JPH0144813B2 - - Google Patents

Description

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

Generally, in a jet room, a weft of the length required for one weft insertion is carried in an air flow and stored in a storage pipe in advance, and then this weft is flown again into the warp shedding by the air flow. However, with this so-called pipe-type weft length measuring device, there is a relatively large resistance when pulling out the weft yarn in the storage pipe by air flow during weft insertion, and the weft yarn is not pulled out from inside the storage pipe. Since the insertion of the weft into the weft is also dependent on the airflow, it is difficult to accurately store the length of weft needed for one weft insertion, resulting in unstable weft insertion and the possibility of weft insertion errors. There was a defect.

In order to solve this problem of the pipe-type weft length measuring device, conventionally, for example, as shown in Japanese Patent Publication No. 46-4872, a winding guide is rotated around a weft storage drum whose rotation is blocked, and a yarn supply bobbin is installed. There has been a so-called drum-type weft length measuring device that continuously winds the weft yarn unwound from the storage drum into a coil shape onto the storage drum and then unwinds the weft yarn to perform weft insertion.

However, with the drum length measuring device, the resistance when rewinding the weft from the storage drum during weft insertion is small, so the weft insertion operation is stable, but it is difficult to accurately measure the weft of the length required for one weft insertion. Since it is not possible to measure the length, even if you try to use this in an air jet loom, the amount of unwinding of the weft yarn will be uneven, making it impossible to actually use it.

In order to eliminate the defects of this drum-type length measuring device, as shown in Japanese Patent Publication No. 50-31229, a plurality of endless belts made of timing belts etc. are connected parallel to each other and spaced at equal intervals, front and back ( At the same time, a plurality of length measuring pins are set upright in each of the endless bands, and a weft of the length required for one weft insertion is placed between the successive length measuring pins. A device has also been proposed that sequentially winds up the weft threads and inserts the wound weft threads during this operation.

However, this length measuring device has a drawback in that it is difficult to manufacture, assemble, and maintain and inspect due to the complicated drive devices including a plurality of endless strips, length measuring pins, drives for driving the endless strips, and driven rollers.

The object of the present invention is to provide a pair of length measuring and rewinding control pins that are operated on a weft storage drum, and to move one weft yarn whose length has been measured by the length measuring control pin to the rewinding control pin side. In order to facilitate the transfer of the weft wound onto the storage drum, a weft transfer section that forms a space between the weft storage drum and the wound weft is provided at the control pin operating position on the outer periphery of the weft storage drum. In addition to smoothly rewinding the weft, during this weft insertion operation, the next weft insertion yarn is continuously and accurately wound onto the storage drum, and stable unwinding is performed to ensure the weft insertion operation. In addition to simplifying the structure, manufacturing, assembly, and maintenance can be carried out quickly.
It is an object of the present invention to provide a weft length measuring device for a shuttleless loom that can be easily inspected.

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.
It is a rotary support shaft that is rotatably supported in the weft insertion direction (right side in Figure 1) through the weaving mechanism, and a pulley 4 is fitted and fixed at the rear end with a key, and the shaft is rotated in synchronization with the weaving operation. It is designed to be actively rotated by a rotating timing belt 5.

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. Then, the support shaft 2 is rotated with the first and second sun gears 6, 8 and the planet gears 10, 11 having the same number of teeth, and the connection shaft 14 and the planet gears 10, 11 are rotated by the support plate 12. Even if it 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 columnar portion 17a at the base end is fitted into the pair of elongated holes 15b so as to be adjustable in position as shown in FIG. It is a horizontal cylindrical weft storage drum made of a steel plate or the like in which a cylindrical part 19a is fitted onto the pair of support pins 17 and caulked. A plurality of tapered protrusions 19b are formed at equal intervals, and the drum 1
The contact area between the weft thread Y and the weft thread Y is reduced to reduce frictional resistance when the weft thread is unwound.

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 tape is bent obliquely toward the outer peripheral 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. Therefore, when the weft yarn is wound up, the weft yarn is wound on the storage rod so that it floats above the storage case 15.
A space is formed between the weft storage drum and the weft storage drum.

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 to which the support arm 23 is fixed is wound around the storage drum 19 and the storage rod 20 in 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 that are inserted into the storage case, the left and right pins 26 have their proximal ends penetrated and fixed to the bottom plate portion 15c of the storage case 15, as shown in FIG. A pair of support shafts, 27 and 28 are both support shafts 2
A pair of fork-shaped operating levers are rotatably supported at the tip of the lever 6, and the lower lever portions 27a and 28a have first and second actuation levers as shown in FIGS. Cam followers 29 and 30 are rotatably supported in rolling contact with cam plates 41 and 42, respectively.

31 is a through hole 15d of the storage case 15 for the upper lever portion 27b of the one operating lever 27.
It is a length measurement 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 inclined part 20a.
In FIGS. b, c, and d), the weft yarn Y let out from the winding guide 22 is wound onto the upper side of the inclined portion 20a. Then, when the length measurement control pin 31 retreats downward from the inclined part 20a (see FIGS. 1 and 5a), the inclined part 20a
The weft yarn Y slides down along the front horizontal portion 20b due to the 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. The driven gear 38, which is rotatably supported, is a reduction gear fitted onto an intermediate shaft 40 rotatably supported via a bearing 39 with respect to 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 2 alternately appears and retracts once above the storage rod 20. That is, the first cam plate 4
1, the formation angle a 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 rotate 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 Figure R, the storage rod 20 is completely retracted from the horizontal part 20b, and at this time
Since the operating position of is in the space between the storage rods 20,
The control pin 32 releases the weft thread being wound up without winding it up. Immediately after that, Figure 6
The weft insertion operation is started as shown by , and the weft insertion is performed while the weft on the storage drum 19 is stably rewound by a weft insertion device (not shown).

As shown in FIG. 6 Y, when the weft insertion operation is completed, the storage drum 1 located in front of the length measurement control pin
The weft stored on 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 FIGS. 5A and 6U, and the weft wound on the upper part of the inclined part 20a slides on this inclined part 20a and is moved to the front horizontal part 20b. , is held by the protruding unwinding control pin 32, but in this case as well, since the length measuring control pin 31 operates in the space between the storage rods 20, the length measuring control pin 31 is unwound when the control pin 31 is retracted. This means that the existing weft threads are released without being rolled up. Thereafter, both control pins 31 and 32 are moved in and out in exactly the same manner as described above to measure the length of the weft and insert the weft.

In this way, the length measurement and unwinding operation of the weft yarn is performed. In the embodiment of the present invention, the length measurement control pin 31 capable of measuring the length of the weft yarn is locked with the measured weft yarn until the weft insertion starts. By providing the inclined portion 20a of the storage rod 20 at the operating position with the unwinding control pin 32 for stably transferring the weft wound on the weft storage drum 19 to the unwinding side. Then, a weft transfer section consisting of a space is formed between the storage rod 20 and the weft storage drum,
Since the control pins 31 and 32 are arranged to wind the weft in a floating state at the operating position, the weft of the length required for one weft insertion can be accurately wound onto the weft storage drum 19. The weft wound during this winding operation can be released from the control pin 31 or 32 in a stable state to perform unwinding for weft insertion.

Further, in the embodiment of the present invention, the length measurement control pin 31 and the rewind control pin 32 are made to alternately appear and disappear by means of cam mechanisms such as the operating levers 27 and 28 and the first and second cam plates 41 and 42. Therefore, the structure can be simplified and manufacturing, assembly, and maintenance inspection can be easily performed.

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

(1) Instead of the storage rod 20, use a storage plate (not shown) having the same function as this.

(2) The storage drum 19 is made into a cylindrical shape without a notch, and an inclined part for transferring the weft to the unwinding side is provided on the outer peripheral surface of the drum 19 at a portion corresponding to the length measurement control pin 31.

As described in detail above, the present invention includes a length measurement control pin that operates on the weft storage drum to measure the length of the weft necessary for one weft insertion, and A rewinding control pin is provided for storing the weft yarn in the drum until the weft insertion starts, and a space between the outer peripheral surface of the weft storage drum and the wound weft yarn is provided at a position corresponding to the control pin. By providing a weft transfer section for forming the weft yarn and forming an inclined section that slopes at the same angle in the weft unwinding direction in the entire area of the weft transfer section, 1.
It is possible to accurately wind up the weft yarn of the length required for weft insertion on the weft storage drum, and also to smoothly release the weft yarn that has already been wound up from the control pin in a stable state during this winding operation. This has the advantage of being able to rewind for weft insertion.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the weft length measuring 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. The explanatory diagram of FIG. 6 is a graph similarly showing the operating state. Weft storage drum...19, storage rod...20, inclined part...20a, winding guide...22, yarn supply bobbin...24, operating lever...27, 28,
Cam follower……29,30, length measurement control pin……
31. Rewind control pin...32. First and second cam plates...41, 42.

Claims (1)

[Scope of Claims] 1. A weft storage drum whose rotation is prevented, and a winding guide that revolves around the weft storage drum and winds the weft from the yarn supply bobbin onto the weft storage drum in relation to a control pin. and
In a shuttleless loom in which weft insertion is performed by unwinding the weft wound into a coil around the weft storage drum, a weft of a length necessary for one weft insertion is operated on the weft storage drum. A length measurement control pin for measuring the length of the weft, and a rewinding control pin for storing the weft wound on the storage drum until the start of weft insertion are provided. A weft transfer section is provided to form a space between the outer peripheral surface of the weft storage drum and the wound weft, and an inclined section that is inclined at the same angle in the weft unwinding direction is formed in the entire area of the weft transfer section. A weft length measuring device for a shuttleless loom, characterized by the following. 2. The shuttleless yarn transfer unit according to claim 1, wherein the weft transfer section is a transfer member comprising an inclined section formed on the outer circumferential surface of the storage drum so that the distance from the center of the storage drum becomes smaller toward the unwinding side. Weft length measuring device for looms. 3. The weft transfer member is an inclined part formed by bending a storage rod made of a wire rod constituting a part of the storage drum so that the radius from the center of the storage drum becomes smaller toward the unwinding side.
A weft length measuring device for a shuttleless loom as described in 2. 4. The length measurement control pin and the rewinding control pin are operated by a cam mechanism that alternately moves in and out of the outer circumferential surface of the storage drum. an actuation lever;
The first cam follower is configured to push a cam follower which is rotatably supported relative to the storage drum side end of the rotational support shaft that revolves the winding guide through a reduction gear mechanism and is pivotally supported by the operating levers. A weft length measuring device for a shuttleless loom according to claim 1, comprising a second cam plate and a second cam plate.