JPH0346574B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weft storage device for a shuttleless loom.

Generally, a rotationally blocked weft storage drum;
A winding guide is provided that revolves around the storage drum and winds the weft from the yarn supply bobbin onto the storage drum, and the weft that has been wound into a coil around the storage drum is wound back to perform weft insertion. In such a shuttleless loom, the outer circumferential surface of the storage drum is simply formed into a cylindrical shape, so when the weft is unwound from the storage drum, the entire weft comes into sliding contact with the outer circumferential surface of the storage drum, and therefore the winding is prevented. The defect was that the return resistance was large, leading to weft insertion errors. (Refer to Japanese Patent Publication No. 46-4872.) An object of the present invention is to arrange a plurality of protrusions on the outer circumferential surface of a storage drum so as to wind the weft yarn in a state of local contact so that the weft yarn is unwinded. As a result, the contact area between the storage drum and the weft yarn can be reduced to reduce frictional resistance during unwinding, the weft insertion operation can be performed reliably, and the positions of all the plurality of protrusions can be adjusted at the same time. When the diameter of the storage drum is changed in order to adjust the length of the weft wound on the storage drum, the adjustment operation can be performed extremely easily and accurately. The purpose of the present invention is to provide a storage device.

Hereinafter, an embodiment embodying the present invention will be explained with reference to the drawings. In the drawings, 1 is a frame located on the side of the machine, and 2 is a bearing 3 for the frame 1.
A rotary support shaft is rotatably supported in the weft insertion direction (right side in Figure 1) through the weaving shaft, and a pulley 4 is fitted and secured to the rear end of this shaft with a key, and synchronized with the weaving operation. The timing belt 5 rotates actively.

6 is a first sun gear fitted into the frame 1 so as to support the support shaft 2 and the bearing 3 and fixed with a bolt 7; 8 is a gear in a stationary state via a pair of metals 9 in the middle of the support shaft 2; The second sun gears 10 and 11 supported by the second sun gears 10 and 11 are a pair of second sun gears 10 and 11 that are keyed to both ends of a connecting shaft 14 that is rotatably supported via a metal 13 to a support plate 12 that is fitted and fixed to the support shaft 2. These are planetary gears, and are meshed with the first and second sun gears 6 and 8, respectively. The first and second sun gears 6, 8 and the planetary gears 10, 11 have the same number of teeth, respectively, and the connection shaft 14 and the planetary gears 10, 11 are connected by the support plate 12 on which the support shaft 2 is rotated. Even if the second sun gear 8 is rotated, the second sun gear 8 is always kept stationary.

15 is a horizontal cylindrical mechanism storage case fixed to the front side of the second sun gear 8 by bolts 16 and held in a stationary position, and a flange portion 15a is integrally formed at the rear end of the outer periphery. formed,
As shown in FIGS. 2 and 3, long arc-shaped holes 15b are formed in the upper portions of the left and right sides of this flange portion, respectively. Reference numeral 17 denotes a pair of support pins into which the rectangular column portion 17a at the base end is fitted in the pair of elongated holes 15b so as to be adjustable in position as shown in FIG. A horizontal cylindrical weft storage drum in which a cylindrical portion 19a is fitted onto the pair of support pins 17 and caulked,
A plurality of tapered protrusions 19b are formed at equal intervals on the outer peripheral surface of the supporting body 19c, which is made of a steel plate or the like and is formed to be elastically deformable. The contact area with the weft yarn Y is made small to reduce the frictional resistance when the weft yarn is unwound. Further, when the mounting position of the support pin 17 with respect to the long hole 15b is changed, the support body 19c of the weft storage drum 19 is elastically deformed, and as a result, the diameter between the protrusions 19b is changed.

20 is a flange portion 15a of the storage case 15;
There are four weft storage rods whose base ends are inserted and locked in the upper part, and which complement the notches of the storage drum 19 that project parallel to each other forward. The weft is bent obliquely toward the outer circumferential surface of the storage drum 19 so that the distance from the center of the storage drum 19 becomes shorter toward the front, thereby forming an inclined portion 20a that allows the weft to be slid forward.

As shown in FIG. 1, reference numeral 21 denotes a thread guide tube inserted and fixed obliquely so as to communicate with the hollow portion 2a of the support shaft 2, and reference numeral 22 is attached to a support arm 23 fixed to the tip of the thread guide tube 21. When the support shaft 2 is rotated, it revolves around the storage drum 19 and the storage rod 20 by the yarn guide tube 21 and the support arm 23, and the support shaft Thread supply bobbin 24 installed behind 2
The weft yarn passing through the hollow portion 2a of the support shaft 2, the yarn guide tube 21, and the ring 25 fixed to the support arm 23 is wound around the storage drum 19 and the storage rod 20 into a coil shape.

Next, the length of the weft that is installed in the storage case 15 and wound up on the storage drum 19 and the storage rod 20 is measured by the length required for one weft insertion, and during that time, the measured weft is To explain the support and drive mechanism of the pair of length measurement control pins 31 and rewind control pins 32, 26 is a pair of left and right pins whose proximal ends are fixed to the bottom plate part 15c of the storage case 15, as shown in FIG. A pair of support shafts, 27 and 28 are both support shafts 26
A pair of fork-shaped actuating levers rotatably supported at the tips of the levers, the lower lever portion 2 of which is
As shown in FIGS. 1 and 2, cam followers 29 and 30 that come into rolling contact with first and second cam plates 41 and 42, respectively, which will be described later, are rotatably supported on 7a and 28a.

Reference numeral 31 denotes a length measurement control pin which is erected so as to be retractable from the upper lever 27b of the one operating lever 27 through the through hole 15d of the storage case 15 to a position corresponding to the inclined portion 20a of the storage rod 20. The weft yarn Y, which is let out from the winding guide 22 in a state of being projected upward by the inclined part 20a (see FIGS. 5b, c, and d), is wound onto the upper side of the inclined part 20a. Then, when the length measurement control pin 31 retracts downward from the inclined part 20a (see FIGS. 1 and 5a), the inclined part 20a
The weft Y is caused to slide down to the front horizontal portion 20b along the weft 0a due to its winding tension.

32 is a through hole 15d of the storage case 15 for the upper lever portion 28b of the other operating lever 28.
It is a weft rewinding control pin that is installed so as to be able to come out and go out through the storage rod 20 to a position corresponding to the front horizontal part 20b of the storage rod 20, and is in a state that projects upward from the horizontal part 20b (FIGS. 1 and 5). a, b, d), the unwinding of the weft yarn Y wound onto the horizontal portion 20b is restricted, and when it is retracted downward from the horizontal portion 20b (see Fig. 5 c), the weft yarn is restricted. It is unraveled and its unwinding is performed.

33 has one end attached to the support shaft 26 as shown in FIG.
The middle part is wrapped around the supporting shaft 26, and the other end is connected to the operating lever 27,
A pair of biasing springs are respectively engaged with the upper lever portions 27b and 28b of 28, and bias the length measurement and rewinding control pins 31 and 32 in the retracting direction.

35 is a drive gear key-fitted onto the support shaft 2 inserted into the storage case 15 as shown in FIG. 1, and 36 is also rotatable relative to the tip of the support shaft 2 via a metal 37. The driven gear 38 supported on the storage case 15 is a reduction gear fitted on an intermediate portion 40 rotatably supported via a bearing 39 on the bottom plate portion 15c of the storage case 15,
The large gear 38a is meshed with the drive gear 35,
A small gear 38b is meshed with the driven gear 36.

41 and 42 are fitted so as to be rotatable relative to the support tube 36a integrally formed on the front side of the driven gear 36, and are tightened and fixed to the gear 36 by bolts 43, so as to reciprocate the cam followers 29 and 30 in the vertical direction. The first and second cam plates are movable, and the insertion holes for the bolts 43 are elongated holes 41a, 42a, so that the mounting position relative to the driven gear 36 can be adjusted.

By the way, the winding guide 22, which revolves integrally with the support shaft 2, rotates an appropriate number of times during one weft insertion operation and wraps one weft on the storage drum 19 and the storage rod 20.
The weft is wound into a coil with a length required for one weft insertion. During this time, the driving gear 35 and the deceleration The number of teeth of the gear 38 and the driven gear 36 is determined.

Moreover, while these cam plates 41 and 42 rotate once, the length measurement control pin 31 and the rewind control pin 3
The shapes of the cam surfaces of both cam plates 41 and 42 are set such that each of the cam plates 41 and 42 alternately moves in and out of the storage rod 20 once. That is, the first cam plate 4
1, the formation angle α of the peak portion 41b is as shown in FIG.
220 degrees, the formation angle β of the valley portion 41c is 140 degrees, and the peak portion 42b and the valley portion 42 of the second cam plate 42
c is the peak portion 41b and valley portion 4 of the first cam plate 41;
It is formed completely opposite to 1c.

In addition, 44 is the planetary gear 1 as shown in FIG.
0, 11, a cover attached to the frame 1 so as to cover the thread guide tube 21 or the support arm 23, etc.;
45 is a lid plate that is fitted and fixed to cover the front of the storage case 15, 46 is a lid plate that is also fixed to the rear surface of the flange portion 15a of the storage case 15, and 47 is provided at a fixed position in front of the storage drum 19. It is a guide ring for the weft yarn, and in front of it there is an air flow (not shown).
A weft insertion means using water or a gripper is provided.

Next, the operation of the weft length measuring device configured as described above will be explained.

Now, in FIGS. 1, 2, and 5a, the length measurement control pin 31 is retracted from the inclined part 20a of the storage rod 20, and the rewinding control pin 32 protrudes above the horizontal part 20b to wind it onto the storage drum 19. 14 shows a state in the middle of a weft length measuring operation in which unwinding of the weft Y that has been stopped is regulated. In this state, the length of weft required for one weft insertion has not yet been wound, and winding is being carried out by the winding guide 22 revolving around the storage drum 19. , second cam plate 4
1 and 42 are rotated in the direction of the arrow in FIG. 2 and the end point P of the valley 41c of the first cam plate 41 is moved to the cam follower 29, the length measurement control pin 31 protrudes as shown in FIG. 6P. When the start point Q of the peak portion 41b pushes the cam follower 29, the length measurement control pin 3
1 becomes fully protruded as shown in FIG. 5B and FIG. The weft is wound onto the upper (left side) inclined portion 20a, and between the two pins 31 and 32 which are in a fully protruding state, a weft of a length necessary for one weft insertion is wound.

When the starting point Q of the peak 41b of the first cam plate 41 corresponds to the cam follower 29, the end point Q' of the peak 42b of the second cam plate 42 is pushing the cam follower 30, so rewinding control is performed. pin 32
As described above, the cam plates 41 and 42 are held in the fully protruding state, and the cam plates 41 and 42 are further rotated so that the second cam plate 42
When the starting point R of the trough 42c corresponds to the cam follower 30, the rewinding control pin 32 moves as shown in FIGS.
As shown in FIG. Weft insertion is performed while being twisted and rewound.

When the weft insertion operation is completed as shown in Z in FIG.
The weft yarn stored on top 9 is completely rewound.
After that, the valley portion 42 of the second cam plate 42 shown in FIG.
When the end point S of c pushes the cam follower 30, the sixth
As shown in FIG.
0, the control pin 32 will move to the positions shown in FIGS.
As shown in Figure T, the end point T' of the peak 41b of the first cam plate 41 corresponds to the cam follower 29, and then the starting point U of the valley 41c of the cam plate 41 corresponds to the follower 29. When pressed,
The length measurement control pin 31 is completely retracted as shown in FIG. 5a and FIG. , held by a protruding rewind control pin 32. Thereafter, both control pins 31 and 3 are operated in exactly the same manner as described above.
2 moves in and out to measure the length of the weft and insert the weft.

In this way, according to the weft length measuring device, 1
It is possible to accurately measure the length of the weft yarn required for the second weft insertion, and perform the weft insertion while rewinding the already measured weft yarn. A plurality of protrusions 19b are formed on the outer circumferential surface of the weft 19c at equal intervals and parallel to each other toward the weft unwinding side, so that the weft wound onto the storage drum 19 will not pass through the protrusions 19b.
By only partially contacting the weft with b, the contact friction becomes small, and the resistance when unwinding the weft becomes small, so that the weft can be rewinded reliably by a weft insertion device (not shown) using an air flow or a gripper. Weft insertion can be performed.

Further, in the embodiment of the present invention, the protrusion 19b is formed in a tapered shape such that the distance from the center axis of the storage drum 19 becomes smaller toward the unwinding side, but in this case, the resistance when the weft is unwinded is further reduced. This allows the weft insertion operation to be performed more reliably.

Moreover, in the embodiment of the present invention, a plurality of protrusions 19
By integrating the ridges 19b and making the positions adjustable at the same time, when changing the diameter of the storage drum 19 in order to adjust the length of the weft wound onto the storage drum 19, all the protrusions 19b of the storage drum 19 can be adjusted at the same time. Since the position can be changed, the weft length adjustment operation becomes extremely easy and can be performed accurately.

Note that the present invention can also be embodied in the following embodiments.

(1) In the above embodiment, the support body 19 of the storage drum 19
Although the protrusion 19b is squeezed and molded on c by a press or the like, this protrusion is formed separately and fixed to the support 19c.

(2) As shown in FIG. 7, between the first and second connecting rings 48 and 49 made of wire, both ends of a protrusion 50 made of wire are connected to form the storage drum 1.
9'.

(3) As shown by the two-dot chain line in FIG. 7, the protrusions 50 of the above alternative example (2) are connected obliquely along the weft unwinding direction (see arrow).

(4) The second connecting ring 49 is omitted from the storage drum 19' shown in FIG. 7, and one end of each protrusion 50 is connected only by the first connecting ring 48.

As described in detail above, the present invention can reduce the contact area between the wound weft and the weft storage drum by using the plurality of protrusions distributed in the outer peripheral area of the weft storage drum. By reducing the frictional resistance during unwinding, the weft insertion operation can be performed smoothly and reliably.

In addition, by forming each of the protrusions in a tapered shape such that the distance from the center of the weft storage drum decreases toward the weft unwinding side, the contact frictional resistance when unwinding the weft can be further reduced, and the weft insertion The operation can be performed more reliably.

Furthermore, since the plurality of protrusions are integrated into the elastically deformable support, when the diameter of the weft storage drum is changed in order to adjust the length of the weft wound onto the weft storage drum, the support The position of each protrusion can be changed at the same time by simply changing and adjusting the mounting position by deforming the body in the radial direction, and the weft length adjustment operation can be performed extremely easily and accurately.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the weft storage device of the present invention, FIG. 2 is a partially omitted front view of FIG. 1,
Fig. 3 is an enlarged perspective view of the vicinity of the storage drum, Fig. 4 is a plan view showing the mounting structure of the length measurement control pin and rewinding control pin, and Figs. 5 a to d are weft length measurement and rewinding control operations, respectively. FIG. 6 is a graph similarly showing the operating state, and FIG. 7 is a perspective view showing another embodiment of the present invention. Weft storage drum...19, 19', protrusion...1
9b, 50, support body...19c, winding guide...22, thread supply bobbin...24, length measurement control pin...31.

Claims (1)

[Claims] 1. Winding the weft yarn around the weft storage drum in conjunction with a weft storage drum whose rotation is prevented and a length measurement control pin that revolves around the storage drum and reciprocates the weft from the yarn supply bobbin in the radial direction of the weft storage drum. In the shuttleless loom, the shuttleless loom is equipped with a winding guide configured to take the weft yarn in a coiled manner on the weft storage drum, and to insert the weft by unwinding the weft yarn wound into a coil shape on the weft storage drum, the weft yarn storage drum is in a state where the weft yarn is in local contact with the weft yarn. The structure includes a plurality of protrusions extending toward the unwinding side of the weft for winding the weft, and an elastically deformable support that supports the protrusions, and the protrusions are used for at least the winding of the weft by the winding guide. They are formed in a tapered shape such that the distance from the center of the weft storage drum decreases toward the weft unwinding side at the take-up position, and are distributed in the outer peripheral area of the weft storage drum, and are further integrated with the support body. 1. A weft storage device for a shuttleless loom, characterized in that the weft storage device is configured such that each protrusion can be adjusted in position at the same time.