JP3357868B2 - Weft insertion nozzle selection device for fluid jet loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft insertion nozzle selection device for a fluid jet loom used for switching a plurality of nozzles to perform multicolor weft insertion.

[0002]

2. Description of the Related Art A nozzle changing device for multi-color weft insertion in a fluid jet loom that selects and uses a plurality of nozzles has been proposed (Japanese Patent Laid-Open No. 61-47552).

[0003] This apparatus is provided with a plurality of nozzles mounted on a nozzle holding member, and a motor for driving the nozzle holding member to rotate.
Both are mounted on the locking shaft. Therefore,
Each nozzle can be moved to a predetermined weft insertion position by rotating a nozzle holding member via a motor in the weft insertion order. However, the nozzles are arranged in a circle with respect to the nozzle holding member. Further, the nozzle holding member may be configured such that a plurality of nozzles are linearly arranged, and the rotation of the motor is changed to the linear motion of the nozzle holding member to move each nozzle to the weft insertion position.

[0004] The weft insertion position referred to here is, for example, a position where the tip of the nozzle is correctly oriented with respect to the flight path of the weft formed on the reed, and is a position suitable for weft insertion.

[0005]

In the prior art, since the motor is mounted on the locking shaft, the bearing for supporting the rotor of the motor is provided when the rocking shaft reciprocates right and left by beating movement. However, there is a problem that an excessive alternating load is applied to the bearing and the bearing is damaged at an early stage. Further, when the operating speed of the loom is increased, the alternating load is further increased, and the durability of the motor is remarkably impaired, and stable weaving may be difficult.

In view of the above-mentioned problems of the prior art, an object of the present invention is to eliminate the alternating load applied to the motor by assembling the motor with the frame of the loom, thereby achieving a stable multicolor weft insertion operation even at high speed operation. An object of the present invention is to provide a weft insertion nozzle selection device for a fluid jet loom which can be easily realized.

[0007]

According to a first aspect of the present invention, there is provided a motor mounted on a frame of a loom, assembled on a locking shaft, and swung only vertically with respect to the locking shaft. A plurality of possible nozzles, a motion transmission mechanism that uses a motor as a drive source, and swings and drives the nozzles collectively via a connecting rod, and a predetermined nozzle to be used for the next weft insertion by rotating the motor. A drive control device for moving the nozzle to a predetermined position, wherein the drive control device includes a correction unit that stores a correction angle as a function of a crank angle, and corrects a swing of the nozzle accompanying a beating motion to a predetermined nozzle. The gist of the invention is to control the rotation of the motor so as to maintain the position at the weft insertion position.

According to a second aspect of the present invention, there is provided a motor mounted on a frame of a loom, a plurality of nozzles mounted on a locking shaft, and capable of swinging only up and down with respect to the locking shaft, a motor as a driving source, and a connecting rod. A motion transmission mechanism that swings and drives the nozzles collectively, and a drive control device that rotates a motor to move a predetermined nozzle used for the next weft insertion to the weft insertion position. An eccentric member that is rotationally driven by a motor, and a swing lever that swings and is driven by the eccentric member via a connecting member that moves back and forth along a locking axis to drive the connecting rod up and down. The gist is to set the effective length Lb 有効 La to the distance La from the axis of the shaft.

In the first invention, the movement transmitting mechanism may include a crank lever that is driven to rotate by a motor, and a swing lever that is driven to swing by the crank lever and drives the connecting rod up and down.

In the first and second inventions, the drive control device moves a predetermined nozzle to a weft insertion position between the time when the cutter for cutting the currently inserted weft and the start of the next weft insertion. The rotation of the motor can be controlled as described above.

[0011]

According to the first and second aspects of the present invention, the motor is mounted on the frame of the loom, and is connected to the plurality of nozzles via the motion transmitting mechanism and the connecting rod. Therefore, the rotational motion of the motor is converted into a rocking motion of moving the plurality of nozzles up and down via a motion transmitting mechanism and a connecting rod, and moving a predetermined one of the plurality of nozzles to a predetermined weft insertion position. be able to.

Since the motor is mounted on the frame of the loom, there is no possibility that an alternating load due to the beating motion will be applied.

Further, in the first invention, the movement transmitting mechanism having the swing lever can correctly convert the rotation amount of the motor into the swing amount of the nozzle via the swing lever and the connecting rod, and can accurately adjust the nozzle. It can be moved to the weft insertion position.

According to the motion transmitting mechanism of the second invention, the rotational motion of the motor can be transmitted as it is to the eccentric member for driving the connecting rod, and the rotational amount of the motor can be reliably converted into the swing amount of the nozzle and the predetermined amount of rotation can be obtained. Can be moved to the weft insertion position.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

The weft insertion nozzle selecting device of the fluid jet loom comprises a motor 25, a plurality of nozzles 21, 21...
And a motion transmission mechanism 30 (FIG. 1). However, the motor 25 is mounted on a frame of a loom (not shown) via a motor bracket 25b, and the plurality of nozzles 21, 21... Are connected via a base bracket 11, a nozzle bracket 12, a swing plate 14, and a locking shaft RC. Has been assembled.

The rocking shaft RC has a sword S
A lead holder RH is assembled via S, SS,..., A plurality of sub-nozzles SN,
SN and a reed R are held. In FIG. 1, the swords SS, SS,..., Sub-nozzles SN, SN
Are shown only one each. The reed R has a notch formed in the reeds R1, R1,. The rocking shaft RC can perform a beating motion by the reed R by reciprocatingly rotating left and right (in the direction of the arrow Kr in FIG. 1).

The base bracket 11 has a locking shaft R
It is attached to C so that it cannot rotate relatively.

The base bracket 11 is a block that forms a holding portion 11a at the upper rear. A mounting hole 11b through which the locking shaft RC is inserted is formed in the lower part of the base bracket 11 in the front-rear direction. The mounting hole 11b has a key groove 11 for a key mounted on the locking shaft RC.
c is formed. A slot 11d is formed below the mounting hole 11b.
1e ... can be tightened. Holder 11a
On the upper surface, there are formed ridges 11a1 and 11a1 parallel to each other on both left and right sides (FIGS. 1 and 2). A pair of left and right guide blocks 11g is provided on the upper surface of the holding portion 11a.
11g is screwed and erected. However, FIG.
2, only the right side of the guide blocks 11g, 11g is partially cut away.

A lead holder R is provided in front of the holding portion 11a.
H is connected to one end, and the nozzle bracket 12
Has been fixed. However, the lead holder RH does not necessarily need to be connected to the base bracket 11.

The nozzle bracket 12 is formed with a pair of left and right arms 12a, 12a standing on both sides in a U-shape. The arms 12a, 12a are connected in a gate shape via a connection plate 12d at the upper end. Further, the nozzle bracket 12 is fitted between the protrusions 11a1, 11a1 of the base bracket 11 via stepped portions 12b, 12b on the lower surface and left and right, and is screwed to the upper surface of the holding portion 11a via mounting bolts 12e, 12e. . However, the mounting bolt 12
The heads of e and 12e are housed at the bottom of the nozzle bracket 12.

The nozzle bracket 12 has a support shaft 13,
The swing plate 14 is mounted via the holder block 15 and the holder block 15. The oscillating plate 14 is formed of a long cross-shaped plate member having overhang portions on both sides of a rear portion. A rod bracket 16 is screwed to the front end of the swinging plate 14 toward one side, and holder blocks 15, 15 are screwed to the overhanging portion of the rear from the back side. The swing plate 14 includes the arms 12a, 12a of the nozzle bracket 12 and the holder block 1.
The stepped support shafts 13, 13 are coaxially and rotatably inserted into the nozzle brackets 5, 15, respectively.
Are supported so as to be able to swing up and down. In addition, caps 12c that cover the support shaft 13 are attached to the outer sides of the arms 12a of the nozzle bracket 12, respectively.

Each nozzle 21 has a rear nozzle body 21a.
The pipe 21b is connected to the
The tip of b is an ejection port 21c. Nozzle body 2
At 1a, a weft inlet Y and an elbow E connected to an air source (not shown) via a tube E1 are assembled. The nozzles 21, 21,... Are collectively mounted on the swing plate 14 via a nozzle supporter 22 that supports the nozzle body 21a and a pipe supporter 23 that supports an intermediate portion of the pipe 21b. Nozzle supporter 22
Is screwed at the rear end of the swing plate 14 so as to be movable left and right. The pipe supporter 23
At the front end of the oscillating plate 14, it is screwed so as to be movable right and left. The plurality of nozzles 21, 21 ...
Are arranged in two rows and four stages, for example, and are arranged in the longitudinal direction of the swing plate 14 toward the reed groove RD of the reed R.

The motion transmitting mechanism 30 includes a crank lever 31 fixed to an output shaft 25a of the motor 25, and a revolving roller 3 mounted on the tip of the crank lever 31 via a shaft 32a.
2 and a swing lever 33. The swing lever 33 includes a fixed shaft 3 fixed to a frame (not shown).
An intermediate portion is rotatably supported via the base member 4, and a cam surface 33 a that bends smoothly is formed on a downward end portion on the right side, and one end of a connecting rod 27 is formed on a lateral end portion on the left side. Are linked. The turning roller 32 has a cam surface 33.
a.

The upper end of the connecting rod 27 is provided with a self-aligning bearing 27a.
The lower end of the self-aligning bearing 2 is screw-connected to the front end surface of the rod bracket 16 on the swing plate 14 via
7b, it is screwed to the tip of the swing lever 33. The connecting rod 27 is attached to the holding portion 11 of the base bracket 11.
A compression spring 27d is mounted between a washer 27c abutting on the lower surface of the holding portion 11a and a self-aligning bearing 27b, which penetrates vertically through a through hole 11h formed in the front portion of the holding portion 11a.

The drive of the motor 25 is controlled via a drive control device 40 (FIG. 3).

An encoder 40a for detecting the crank angle θ is connected to the main shaft CS of the loom. Encoder 4
0a from the weft selection command device 4
In addition to 0b, it is branched and input to the rotation command means 41 and the correction means 42 of the drive control device 40. The output of the weft selection command device 40b is branched and connected to a rotation command means 41 and a correction means 42. The output of the correction means 42 is connected to the rotation command means 41, and the output of the rotation command means 41 is connected to the motor 25 via the drive control circuit 43. An encoder 40c and a tacho generator 40d are directly connected to the motor 25.
c, the rotation amount X and the rotation speed V of the motor 25 from the tachogenerator 40d together with the current I from the current detector 43a interposed between the drive control circuit 43 and the motor 25,
Each is fed back to the drive control circuit 43.

Now, when the motor 25 is rotated forward and backward,
The swing plate 14 swings up and down about the support shafts 13, 13 via the crank lever 31, the swing lever 33, and the connecting rod 27 (in the direction of arrow K2 in FIG. 1). Therefore, the nozzles 21 and 2 mounted on the swing plate 14 are
.. Swing together integrally with the swing plate 14 only vertically (in the direction of the arrow K1 in the figure). However, the swing plate 14 at this time is guided vertically by the guide blocks 11g on the holding portion 11a.

The nozzles 21, 21 are arranged in two rows and four stages, and the relative relationship between the reed R and the reed groove RD is shown in FIG.
(A) is set. That is, the crank lever 31 rotates in the direction of arrow K3 in FIG.
When the shaft 32a of the revolving roller 32 is at the rotation position B1,
The swing lever 33 is rotated most counterclockwise about the fixed shaft 34 (solid line in FIG. 5), and at this time, the tip of the nozzles 21 and 21 (nozzle numbers A1 and A5) in the uppermost stage are ejected. The outlets 21c, 21c are directed to the reed groove RD of the reed R (FIG. 4).
(A)).

When the crank lever 31 rotates and the shaft 32a moves in the order of the rotational positions B2, B3, and B4 in FIG. 4B, the motor 25
The swing lever 33 is rotated clockwise through the cam surface 33a (two-dot chain line in FIG. 5), and the swing lever 33 is
7. The nozzle numbers (A2, A6
), (A3, A7), and (A4, A8), the nozzles 21 and 21 belonging to the same stage can be directed two by two toward the reed groove RD in order to obtain a predetermined weft insertion position. However, the swing lever 33 is constantly biased counterclockwise via the compression spring 27d, and the swing amount in the counterclockwise direction is regulated via the cam surface 33a and the turning roller 32. Also, the nozzles 21, 21...
When the swing plate 14 is vertically swung up and down and left and right, two of each stage are directed to the reed groove RD.

On the other hand, the swing plate 14, the nozzles 21, 2
1... Swing up and down with the beating movement of the rocking shaft RC even if the swing lever 33 is kept stationary. The front end of the swinging plate 14 is connected to a swinging lever 33 via a connecting rod 27. When the rocking shaft RC reciprocates left and right for a beating movement (in the direction of arrow Kr in FIG. 5), This is because it is driven up and down via the connecting rod 27. Therefore, the drive control device 40 determines that the two nozzles 21 and 2 including the predetermined nozzle number Ai (i = 1, 2,... 8)
1 to the weft insertion position, and corrects the swing of the nozzles 21, 21.
The rotation of the motor 25 can be controlled so that 1 is maintained at the weft insertion position (FIG. 3).

The weft selection command device 40b stores the nozzle numbers Ai of the nozzles 21 used for weft insertion in order for each pick. Therefore, the weft selection command device 40b
Can specify the nozzle number Ai of the nozzle 21 to be used for the next weft insertion at a predetermined crank angle θ = θo based on the crank angle signal S1 from the encoder 40a and output it as the command signal S2. However, the predetermined crank angle θo is a timing immediately after the completion of the weft insertion operation, and it is generally preferable that θo ≧ 290 °.

On the other hand, the rotation command means 41 outputs the nozzle number A
The rotational position Bj (j = 1, 2,...) of the shaft 32a corresponding to i
4) is stored, and when the next nozzle number Ai is designated by the weft selection command device 40b via the command signal S2, the rotational position Bj corresponding to the nozzle number Ai is read out from a memory (not shown), and the current rotational speed is read. The relative movement angle Bx = Bb-Ba corresponding to the difference between the position Bj = Ba and the next rotational position Bj = Bb can be calculated. However, the rotational position Bj indicates the rotational angle position of the output shaft 25a of the motor 25 and the crank lever 31 by an absolute angle with an arbitrary position as the origin. Therefore, the relative movement angle Bx has a positive or negative sign. Shall be.

The correction means 42 supplies the corresponding rotation position Bj as a function of the crank angle θ for each nozzle number Ai.
(I = 1, 2,... 8) are stored. Here, the correction angle δi (θ) is the correction rotation amount of the motor 25 required to maintain the nozzle 21 of the nozzle number Ai at the predetermined weft insertion position regardless of the beating movement by the locking shaft RC. It is. Correction means 42
Is the next nozzle number Ai from the weft selection command device 40b.
Is given, the crank angle θ from the encoder 40a
And the correction angle δ = δi corresponding to the crank angle θ.
(Θ) can always be output to the rotation command means 41.

However, in FIG. 4, the correction angles δi (θ) corresponding to the nozzles 21 and 21 belonging to the same stage have the same contents because the rotation position Bj is common. Therefore, the correction means 42 sets the correction angle δ for each nozzle number Ai.
Instead of storing i (θ), a correction angle δj (θ) (j = 1, 2,... 4) is stored for each rotational position Bj, and when the nozzle 21 of the nozzle number Ai is designated, The rotational position Bj corresponding to the nozzle 21 may be found, and the correction angle δ = δj (θ) may be calculated with reference to the crank angle θ.

Then, the rotation command means 41 calculates a target rotation amount Xo for the motor 25 based on the relative movement angle Bx and the correction angle δ from the correction means 42, and outputs it to the drive control circuit 43 as a target signal S3. can do.
That is, the drive control circuit 43 controls the rotation of the motor 25 so that the rotation amount X = Xo, and the predetermined nozzle number Ai
The nozzle 21 can be moved to the predetermined weft insertion position, and can be properly maintained at the weft insertion position regardless of the beating movement. The rotation amount X from the encoder 40c is for positioning the motor 25, and the rotation speed V from the tacho generator 40d and the current I from the current detector 43a are for improving the responsiveness of the control system. .

When the nozzle 21 of the nozzle number Ai is moved to the weft insertion position for the next weft insertion via the rotation command means 41, the next weft insertion is started after the current weft insertion is completed. And generally, the crank angle θ
It may be in the range of {290} to 70}. However, the timing at which the weft inserted in this time and the weft connected to the nozzle 21 from the cloth fell is cut by the cutter has a crank angle θ ≒ 10
Considering that 時期, the timing for moving the nozzle 21 for the next weft insertion is determined by the crank angle θ {10} to 7
It is preferable that the angle is in the range of 0 °. The rotation command means 41 drives the target rotation amount Xo for the next weft insertion at a predetermined time with reference to the crank angle θ from the encoder 40a in order to appropriately set the timing for moving the nozzle 21. Output to the control circuit 43.

On the other hand, in order to maintain each nozzle 21 at the weft insertion position, the correction means 42 does not always output the correction angle δ, but a minimum range including the weft insertion period by the nozzle 21, that is, the crank angle θ ≒. The correction angle δ may be output within a range of 70 ° to 290 °.

In the above description, the combination of the cam surface 33a of the swing lever 33 and the revolving roller 32 is constituted by a positive cam mechanism such as a grooved cam.
Can be omitted.

When the correction angles δi (θ) and δj (θ) stored in the correction means 42 can be considered to be the same for each nozzle 21, all the nozzles 21, 2
A common correction angle δ (θ) can be applied to 1.

[0041]

[Other Embodiments] In FIG. 1, a plurality of nozzles 21,
The oscillating plate 14 on which 21 are mounted may be omitted (FIG. 6). The nozzle supporter 22 supporting the nozzle body 21a of each nozzle 21 includes left and right support shafts 22a,
2a is protruded coaxially, via the nozzle bracket 12,
It is mounted so as to swing up and down with respect to the locking shaft RC. On the other hand, a projecting piece 23b is provided upright on the pipe supporter 23 holding the pipe 21b of each nozzle 21.
The upper end of the connecting rod 27 is connected to 3b. Therefore, each nozzle 21 is held by the nozzle supporter 22 and the pipe supporter 23, and can be moved to a predetermined weft insertion position by driving the protruding piece 23b up and down via the connecting rod 27. Note that the nozzle supporter 22 and the pipe supporter 23 may be connected via an appropriate reinforcing connecting material.

The motion transmitting mechanism 30 shown in FIG. 1 may be replaced with a motion transmitting mechanism 50 constituted by a crank lever 51, a connecting member 52, and a swing lever 53 (FIG. 7). The crank lever 51 is fixed to the output shaft 25 a of the motor 25, and is connected to the tip of a swing lever 53 via a connecting member 52. The swing lever 53 is rotatably supported by a frame of a loom (not shown) via a fixed shaft 54 at the base, and the lower end of the connecting rod 27 is connected to the intermediate portion.

The motion transmitting mechanism 50 rotates the motor 25 in the forward and reverse directions to thereby rotate the crank lever 51 and the connecting member 5.
2, the nozzle 21 via the swing lever 53 and the connecting rod 27,
21 can be swung up and down to move the predetermined nozzle 21 to the weft insertion position. In addition, the connecting member 52 is
A flexible wire, a chain, or the like may be used to urge the tension state through a tension spring.

The swing lever 53 is mounted on a locking shaft RC (FIGS. 8 and 9), and the connecting member 52 is
It can be arranged parallel to C. The swing lever 53 is
A block 11f screwed to the upper surface of the base bracket 11 on the locking shaft RC is attached via a fixed shaft 54 to be vertically swingable. The lower end of the connecting rod 27 is connected to the rear end of the swing lever 53, and the rear end of the connecting member 52 is screwed to the lower end via a self-aligning bearing 52a. The front end of the connecting member 52 is connected to the motor 2 via a self-aligning bearing 52b.
5 is screwed to an eccentric position of an eccentric member 55 mounted on the output shaft 25a. Adjustment screws 52c, 52c for adjusting the length are attached to both ends of the connecting member 52, and the motor 25 is attached to the frame FM of the loom via the motor brackets 25b, 25g. The effective length Lb 有効 La of the connecting member 52 is set with respect to the distance La from the axis RCa of the locking shaft RC.

When the motor 25 is rotated in the forward and reverse directions, the connecting member 52 moves back and forth along the locking axis RC (in the direction of arrow K4 in FIG. 9), and swings the swing lever 53 up and down (see FIG. 9). Arrow K5 direction), the nozzle 21 via the connecting rod 27,
21 can be moved up and down to move the predetermined nozzles 21, 21 to the weft insertion position. On the other hand, when the rocking shaft RC reciprocates for a beating motion during the weft insertion period, a downward one end of the swing lever 53 is moved to the locking shaft R.
C and the connecting member 52 at this time.
Since the effective length Lb≫La, the swing lever 53 is not unnecessarily swung, and the effect of the beating movement on the nozzles 21 can be substantially ignored.

That is, in FIG.
The vertical swing amount of the nozzles 21, 21,... Due to the reciprocating rotation of C depends on the vertical swing amount of the rear end of the swing lever 53, and the swing amount of the rear end of the swing lever 53 is swingable. It is determined by the lever ratio of the lever 53 and the swing amount before and after the downward one end. The amount of swinging of the downward end of the swing lever 53 is determined by the amount of rotation of the locking shaft RC, the effective length Lb of the connecting member 52, and the axis RCa of the locking shaft RC.
And the distance La of the connecting member 52 from the
The value becomes smaller as / Lb becomes smaller. Therefore, the connecting member 5
The effective length Lb of the nozzle 2 is the amount of vertical swing of the nozzles 21, 21,..., That is, even if the locking shaft RC reciprocates right and left due to beating movement during the weft insertion period.
.. May be set large enough so that the amount of vertical movement of the tips of 1, 21,... Does not affect the weft insertion. At this time, the motor 25 controls the correction by the correction means 42 of FIG. Can be omitted.

In FIGS. 8 and 9, the nozzles 21, 21.
Can be moved to the cutting position of the cutter C after inserting the weft Ya from any of them and then cutting the weft Ya by the cutter C (FIG. 10). However, the figure shows the nozzle number A4 at the bottom.
, A8 nozzles 21, 21 are moved to the weft insertion position,
This shows a state in which the weft Ya from one side is inserted.

In FIG. 10, the specific nozzle 21 for weft insertion of the weft Ya has a reed groove R of the reed R of the flight path of the weft Ya.
Although it is positioned at the weft insertion position where the inclination is sufficiently small with respect to D (the solid line in the figure), its tip position does not always coincide correctly with the extension of the reed groove RD. On the other hand, a cutter C comprising a combination of a fixed blade C1 and a rotary blade C2.
Are disposed between the nozzles 21, 21... And the reed R, and the cutting position of the weft Ya by the cutter C is on the cutting edge of the fixed blade C1 substantially on the extension of the reed groove RD (see FIG. Chain line). However, in FIG. 10, it is assumed that the cutter C is disposed perpendicularly to the plane of the drawing so that the weft Ya from the nozzle 21 can be cut when the reed R has almost advanced to the beating position.

Therefore, the weft Ya from a specific nozzle 21
When the cutter C is actuated as it is when the beet is beaten and beaten, the weft Ya is rotated by the rotation of the cutter C due to the mismatch between the flight path at the time of weft insertion and the cutting position by the cutter C. The blade C2 forcibly bends from the nozzle 21 to the cutter C (dotted line in the figure), causing an excessive tension to cause various troubles.

Therefore, the nozzles 21, 21,..., Between the completion of the weft insertion and the operation of the cutter C, that is, during the crank angle θ {290} to 10 °, apply the weft Ya from the nozzle 21 immediately after the weft insertion. By moving the weft Ya to the cutting position of the weft Ya by the cutter C (two-dot chain line in the figure) and then operating the cutter C, it is possible to effectively prevent the application of excessive tension to the weft Ya. Also,
The correction control of the nozzles 21, 21... Described above can be easily realized by providing a correction means similar to the correction means 42 in FIG.

That is, the necessary correction amount αi (i = 1, 2,..., 8) for each nozzle 21 is uniformly determined by the stage to which the nozzle 21 belongs. The nozzle 21 immediately after weft insertion is specified based on S2, the correction amount αi corresponding to the nozzle 21 is found, and the correction amount α = αi is output to the rotation command means 41 at a predetermined timing. However, the nozzle 21 immediately after weft insertion needs to be moved either upward or downward depending on the stage to which the weft Ya is to be aligned with the cutting position of the cutter C, so that the correction amount αi is positive or negative. Can be taken. Further, the nozzles 21, 21...
After cutting the weft Ya, the predetermined nozzles 21, 21 are moved to the weft insertion position for the next weft insertion until the start of the next weft insertion, that is, during the crank angle θ {10 ° to 70 °}. Shall be allowed.

The nozzles 21, 21... May be driven to swing up and down through another movement transmitting mechanism 60 (FIG. 11). The motion transmission mechanism 60 includes gears 61 and 62 that are driven to rotate by the motor 25, a timing belt 63, and an eccentric member 64. The connecting rod 27 is connected to an eccentric position of the eccentric member 64. The gears 61 and 62 are supported by a bracket 65a, and a timing belt 63
Is connected to the gear 62 and the eccentric member 64 via the bracket 65b.
And are wound around timing pulleys 63a and 63b which are coaxial. The timing pulley 63b, the eccentric member 6
4 is supported by brackets 65b and 65c, and the brackets 65a, 65b and 65c are respectively fixed to frames (not shown).

In order to move the predetermined nozzle 21 to the weft insertion position, the motor 25 is rotated to rotate the eccentric member 64, and the nozzles 21, 21,... . Note that the timing belt 63 may be replaced with a chain, a flat belt, or the like. Also, the gears 61 and 6
2 may be replaced with a timing belt, a chain, a flat belt, or the like.

The nozzles 21, 21,...
(FIG. 12). The motion transmitting mechanism 70 includes a gear 71 driven by the motor 25 and an eccentric member 72 mounted on the locking shaft RC. The gear 71 meshes with a gear 72 a formed on the outer periphery of the eccentric member 72. The eccentric member 72 is relatively rotatably mounted on the locking shaft RC via a bearing 72b, and the connecting rod 27 is connected to an eccentric position of the eccentric member 72 via a connecting member 74.

To move the predetermined nozzle 21 to the weft insertion position, the eccentric member 72 is rotated via the motor 25,
.. May be swung up and down via the connecting rod 27. The eccentric member 72 has a locking shaft RC.
Is mounted on the locking shaft R
With respect to the beating movement by C, the nozzles 21, 21,...

In FIG. 12, the connecting rod 27 may be directly connected to the eccentric member 72 without using the connecting member 74. Further, the motor 25 and the eccentric member 72 are replaced with the gears 71 and 72a,
You may connect via a flat belt etc. Further, in FIGS. 6 to 12, the nozzles 21, 21.
4 can be mounted on the nozzle bracket 12.

In the above description, the correction control of the nozzles 21, 21,... For moving the weft Ya from the nozzle 21 immediately after weft insertion to the cutting position of the cutter C is performed not only by the motion transmitting mechanism 50 of FIGS. , Other motion transmission mechanisms 30, 50,
The present invention can be applied to the case where 60 and 70 are used.
However, the correction amount αi at this time also takes into account the influence of the beating movement by the rocking shaft RC, and when the cutter C is activated, the weft Ya from the nozzle 21 immediately after weft insertion correctly matches the cutting position of the cutter C. Shall be set to

.. May be arranged in m rows and n stages, instead of being arranged in two rows and four stages. However, m and n are arbitrary integers of 1 or more and 2 or more, respectively. Also, the nozzles 21, 21... May be moved up and down in parallel instead of swinging up and down.

The fluid jet loom according to the present invention includes a water jet loom in addition to an air jet loom.

[0060]

As described above, according to the first and second aspects of the present invention, the motor mounted on the frame of the loom and the motor mounted on the locking shaft can swing only up and down with respect to the locking shaft. By combining the plurality of nozzles and the motion transmitting mechanism, the motor can be fixed to the frame and the alternating load due to the beating motion can be prevented from being applied to the motor, so that the durability of the motor is not impaired. Also, even during high-speed operation, there is an excellent effect that the nozzle can be reliably moved to the weft insertion position, and a stable multicolor weft insertion operation can be easily realized.

[Brief description of the drawings]

FIG. 1 is a perspective view of the overall configuration.

FIG. 2 is an enlarged cross-sectional view corresponding to line XX of FIG. 1;

FIG. 3 is a control block diagram.

FIG. 4 is an operation explanatory diagram (1).

FIG. 5 is an operation explanatory view (2).

FIG. 6 is an essential part perspective view showing another embodiment (1).

FIG. 7 is an essential part perspective view showing another embodiment (2).

FIG. 8 is an essential part perspective view showing another embodiment (3).

FIG. 9 is an explanatory front view corresponding to the arrow Y in FIG. 8;

FIG. 10 is an operation explanatory diagram of FIGS. 8 and 9;

FIG. 11 is an essential part perspective view showing another embodiment (4).

FIG. 12 is an essential part perspective view showing another embodiment (5).

[Explanation of symbols]

 Ya ... weft FM ... frame RC ... locking shaft C ... cutter 21 ... nozzle 25 ... motor 27 ... connecting rod 30, 50, 60, 70 ... motion transmission mechanism 31, 51 ... crank lever 33, 53 ... swing lever 40 ... drive Control device 55, 64, 72 ... Eccentric member

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) D03D 47/38 D03D 47/28

Claims (4)

(57) [Claims] A motor mounted on a frame of a loom;
A plurality of nozzles that can be assembled to a locking shaft and swing only up and down with respect to the locking shaft, a motion transmission mechanism that uses the motor as a drive source, and swings and drives the nozzles collectively via a connecting rod; A drive control device for rotating a motor to move a predetermined nozzle used for the next weft insertion to a weft insertion position, the drive control device comprising: a correction unit for storing a correction angle as a function of a crank angle. With
A weft insertion nozzle selection device for a fluid jet loom, wherein the motor is controlled to rotate so as to maintain a predetermined nozzle at a weft insertion position by correcting the swing of the nozzle due to a beating motion. 2. A motor mounted on a frame of a loom;
A plurality of nozzles that can be assembled to a locking shaft and swing only up and down with respect to the locking shaft, a motion transmission mechanism that uses the motor as a drive source, and swings and drives the nozzles collectively via a connecting rod; A drive control device for rotating a motor to move a predetermined nozzle used for the next weft insertion to a weft insertion position, wherein the motion transmission mechanism includes an eccentric member rotationally driven by the motor, and a locking shaft. A swinging lever driven by the eccentric member via a connecting member that moves back and forth along the rocking axis to drive the connecting rod up and down, wherein the connecting member is disposed at a distance La from the axis of the locking shaft. A weft insertion nozzle selection device for a fluid jet loom, wherein the effective length is set to Lb≫La. 3. The motion transmitting mechanism according to claim 1, further comprising a crank lever that is driven to rotate by the motor, and a swing lever that is driven to swing by the crank lever and drives the connecting rod up and down. Item 3. A weft insertion nozzle selection device for a fluid jet loom according to Item 1. 4. The drive control device controls the rotation of the motor so as to move a predetermined nozzle to a weft insertion position between the operation of a cutter for cutting the currently inserted weft and the start of the next weft insertion. The weft insertion nozzle selection device for a fluid jet loom according to any one of claims 1 to 3, characterized in that: