JPS58214559A - Apparatus for measuring length of weft yarn in fluid jet loom - 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 Technical Field The present invention relates to a weft length measuring device for a fluid jet loom.

Prior Art In general, there is a drum-type weft measuring method in which the weft supplied from a yarn supply bobbin is continuously wound into a coil around the tapered peripheral surface of a weft storage drum, and the wound weft is pulled out during weft insertion. In the long device, the yarn winding tube revolves around a storage drum held stationary to wind the weft around the storage drum, and is capable of alternately appearing and retracting from the circumferential surface of the storage drum. A pair of weft engagement pins arranged in front and behind with respect to the line direction controlled the winding amount of the weft and the movement of the wound weft in the pull-out direction.

In this type of drum-type weft length measuring device, the rotational speed of the thread winding tube is changed to change the weft length measurement interval in response to changes in the weaving width, that is, the weft insertion length, from one weft insertion to the next. There is a method of changing the number of turns of the weft wound on the storage tram during weft insertion 1.

However, with this conventional method, the number of turns of the weft yarn could only be changed in integer units, and the length measurement could not be changed in small increments. -1 Purpose This invention was made to solve the problems in the conventional device, and its purpose is to change the length of the weft by changing the relative rotational speed of the bobbin winding f=J pipe. It is an object of the present invention to provide a weft length measuring device for a fluid injection type loom that can change the length measurement amount in small increments by changing the number of windings in fractional units.

Embodiment Below, an embodiment embodying the present invention will be described with reference to FIGS. 1 to 10.
A bracket 2 is fixed to the bracket 2 with a bolt 3, and a gear 4 is integrally formed on the front side (right side in FIG. 1) of the bracket 2. A support arm 5 having a hanging part 5a facing the bracket 2 is fixed to the upper part of the bracket 2 by a pole 6, and a rotary support shaft 8 having a thread guide hole 7 at its axis is attached to the bracket 2 and the hanging part 58. is rotatably supported via a bearing 9. A bracket 2 is attached to the rotation support shaft 8.
and the hanging portion 5a, the toothed pulley 10 is connected to the key 11. It is fixed by a taper body 7 12 and a NAND 13, and is rotated by a timing belt 14 driven in synchronization with the weaving operation.

The flange 15 formed in the middle part of the rotation support shaft 8 has a
As shown in FIG. 2, a horizontally long support 16 is press-fitted and fixed. A gear 1 is installed in the housing of the tip shaft portion 17 of the rotation support shaft 8.
A bracket 19 having an integrally formed bracket 19 is supported through a pair of bearings 20 so as to be relatively rotatable. As shown in FIG. 2, a rotation support shaft 8 is provided on both sides of the support body 16.
A pair of rotating shafts 21 extending in the axial direction of the bearings 22
They are each rotatably supported via. At both ends of both rotating shafts 210, there are a pair of planetary gears 23.24, 25.2 each meshing with the gear 4.18 as a sun gear.
6 is fixed. Then, the support body 16 rotates as the rotation support shaft 80 rotates, and the planetary gears 23, 24, 25 .
When gear 26 rotates while meshing with gears 4 and 18, the trap also rotates gears 4 and 1 so that gear 1B is always kept stationary.
The date and the number of teeth of the planetary gears 23, 24, 25, and 26 are set. Further, a thread winding tube 27 is fixed to the support ('*16) so as to pass obliquely through the thread guide hole 7 of the rotation support shaft 8.

A storage drum 28 for winding the weft from the bobbin U-tube 27 is fixed to the front side of the bracket 19 at the rear wall 29 as shown in FIG. A front wall portion 31 formed integrally with the surface length measuring portion 30 is rotatably supported via a bearing 32.

The length measuring section 30 includes a steeply sloped taper section 30a and a gently sloped straight section 30b. Through holes 33 and 34 are respectively formed through which weft engagement pins, which will be described later, come in and out.

At an intermediate position of the tip shaft portion 17, a first cam 35 is supported in its support cylinder portion 35aVC so as to be relatively rotatable via a bearing 36°31, and a support cylinder portion 38a is provided on the outer peripheral surface of the support cylinder portion 35a. A second cam 38 having a gear 39 integrally formed therein is fixed to the first cam 35 by a screw 40 so as to be able to rotate together with the first cam 35 . A gear 4 is attached to the tip of the tip shaft portion 17.
1 is fixed by a key 42 so as to be integrally rotatable. A gear 43 having a larger diameter than the gear 41 and meshing with the gear 41 is rotatably mounted on the front wall portion 31 via a bearing 44, and the gear 431'? : A gear 45 meshing with the gear 39 is fixed with a bolt 46. When the gear 41 rotates together with the tip shaft portion 1γ, the gear 43.4
A gear 39 is rotated through the gear 5, and the first cam 35 and the second cam 38 are rotated together with the gear 39.

As shown in FIGS. 3 and 4, support brackets 47 are protruded from the rear wall portion 29 of the storage drum 28 at four locations corresponding to the through holes 33 and 34.
Two guide tubes 48 and 49 are fitted into the length measuring section 7 in a direction perpendicular to the length measuring section 30. Both guide tubes 4B and 49 have
A support plate 50.51 is fixed to the lower end, and a rod 54.55 to which a pin holder 52.53 is fixed to the upper end is slidably inserted. Outside 5 of both guide tubes 4B and 49
5 in the axial direction of the storage drum 28
, 57 are wrapped. Further, the support plate 50.51 is provided with controls for controlling the winding amount of the weft yarn for the cam followers 5B and 5928 that contact the second cam 38 and the first cam 35, respectively, and the movement of the wound weft yarn in the weft pulling direction. (3)) The through hole 3 formed in the length measuring section 30
Weft thread engaging piers AI, A2.3, A2.3, A2.3, A2. A3. A4, Bl, B2p
B3gB4 is fixed. One weft engaging pin Al-A4 that sinks into the length measuring section 30 during weft insertion is connected to the other weft engaging pins Bl to B that protrude to the outer surface of the length measuring section 30 during weft insertion.
4 (to the right in Figure 1.3).

The second cam 3B has four peaks 381 as shown in FIG.
2 and troughs 38G are formed alternately, and the one weft engagement pin Al
- A4 appears and disappears from the length measuring section 30 once. The other weft engagement pin 13. The first cam that drives B4 is also formed in a similar shape to the second force 38, and each time the first cam rotates four times, the other weft engagement pins B1 to B4 move against the length measuring section 30. The monster will appear once.

Regarding the weft sub-length device configured as described above, the case where the winding tube 27 rotates 4.2'5 times during the period from one weft insertion to the next weft insertion size, 1 Jl, that is, 1 pink of the loom, is assumed. The effect will be explained using an example. In this case, while the rotation support shaft 8 rotates 4.25 times, the gear 39
The number of teeth is set at 41, 43.45.

Now, when operating this weft sub-length device, there is no trench,
With one weft engagement pin A+-A4 located on the weft pull-out side of the length measuring section 30 protruding from the outer surface of the length measuring section 30,
The weft yarn supplied from the yarn supply bobbin (not shown) is passed from the yarn guide hole 7 to the outlet of the bobbin winding tube 27, and after being wound around the length measuring section 30 a predetermined number of times, the weft yarn is passed through the weft insertion means via the weft engagement pin A1. Guide the weft thread with a cent. When the loom starts operating in this state, the timing belt 14 is driven in synchronization with the weaving movement. The rotation support shaft 8 is rotated via the toothed pulley 10. When the rotation support shaft B rotates, the support body 16
The planetary gears 2a, 24, 25.
Due to the relationship between the number of teeth of the gears 25, 26 and 4, 18, the gear 18 is always kept stationary even when the planetary gears 23, 24, 25, 26 revolve around the gears 4, 18. Therefore, the storage drum 28 fixed to the bracket 19 formed integrally with the gear 18 is always kept stationary even when the rotation support shaft 8 rotates. On the other hand, since the thread-wrapped tube 27 fixed to the support 1i rotates together with the rotary support shaft 8, its tip revolves around the length-measuring section 300, and the weft is wound around the length-measuring section 30.

One weft engagement pin Al-A4 protrudes into the length measuring section 30,
The first cam 3 is in a state where the weft is being wound.
5. When the second cam 38 rotates and the contact between the trough of the first cam 35 and the cam follower 59 ends, the first cam 35 resists the biasing force of the compression spring 57 and moves the weft engagement pins B1 to B4.
starts pressing the rod 55 in the direction in which it protrudes. The movement is completed when the peak of the first cam 35 comes into contact with the cam follower 59, and the other weft engagement pins Bl to B4, which are fixed to the roid 55 via the pin holder 53, are inserted into the length measuring section 30. The length measuring section 30 changes from a sunken state to a state protruding from the outer surface □, and the weft thread to be wound subsequently by the thread winding tube 27 is reliably separated from the weft thread previously wound around the length measuring section 30. As shown in FIG. 5, in the length measuring section 30, the weft is wound 4.25 times between the weft engagement pins AI and B2.

First cam 35. When the second cam 38 further rotates and the contact between the crest 381 of the second cam 38 and the cam follower 58 ends, the rod 54 is moved to the guide tube 4 by the compression spring 56.
8, one of the weft thread engaging pins A1 to A4 is moved in the retracting direction, and the same weft thread engaging pins A, to A4, which had been held in a protruding state until then, are simultaneously retracted into the length measuring section 30. Start. At the time when the trough 38e of the second cam 38 and the cam follower 58 come into contact, the weft engagement pin A is removed.

~A4 is completely immersed in the length measuring section 30 as shown in FIG.
Weft insertion is started by the weft insertion nozzle 60 while the weft W wound up between I*B2 is being pulled out. The crank angle at this time is approximately 90° as shown in Figure 10.
It is.

The other weft engagement pin B1 to B located on the thread winding W27 side
4 is maintained in a protruding state even during the weft insertion operation, and restricts the weft W wound by the thread winding tube 27 from moving to the drawing side. Weft insertion is completed when the weft W that has been wound up between the weft engagement pins AI and B2 is completely pulled out and its end is caught on the weft engagement pin B2 (FIG. 6).

After that, the first cam 35. The second cam 38 continues to rotate, the crest 381) of the second cam 38 comes into contact with the cam follower 58 again, and the rod 54 slides along the guide tube 48 against the biasing force of the compression spring 56. One weft engagement pin A1
~A4 protrudes from the outer surface of the length measuring section 30. Thereafter, the valley of the first cam 35 comes into contact with the cam follower 59, and the rod 55
is slid along the guide cylinder 49 by the compression spring 51 in the direction in which the other weft thread engaging pins B1 to B4 are retracted, and the weft thread engaging pins B1 to B4 are completely recessed into the length measuring section 30 again. . The weft W, which had been wound around the length measuring section 30 with its movement toward the drawer side being regulated by the weft engagement pin B l-B 4, moves to the drawer side as shown in FIG. The transition is regulated in a state where it is caught on one of the protruding weft engagement pins A2. The crank angle at this time is approximately 310°. Next, the weft yarn W continuing from the weft insertion nozzle 60 to the weft end is passed through a cutter 61 as shown in FIG.
Cut with.

Then, by the action of the first cam 35, when the other weft engagement pin Bl-B4 again protrudes to the outer surface of the length measuring section 30, as shown in FIG. The weft W is wound 4.25 times between. Thereafter, the weft engagement pins A1 to A4 on one side of the rotation are recessed into the length measuring section 30,
As shown in FIG. 9, the next weft insertion is started. In the previous weft insertion, the weft W was wound 4.25 times between the weft engaging pins A1 and B2, whereas this time, the same amount of weft W was wound between the weft engaging pins A2 and B3. is being wound up. In other words, the weft thread engaging pins A, ~A4 that act on the weft thread WIC
, I3+ to B4 are shifted in order for each pick of the loom, but the amount of weft W wound up between both thread engagement pins A1 to A4 degrees 31 to 34 is always 4 degrees and 25 turns.

When changing the storage amount in response to a change in the weft insertion length (weft insertion length, weaving width), for example, the amount of winding of the weft yarn to the length measuring section 30 is set to 4.5.
When changing to winding, the thread winding tube 27 is rotated 4.5 times while the loom is in the l pink position, and the rotation support shaft 8 is rotated 4.5 times.
While the first cam 3.15 rotates 5 times, the gear 39°41.5 rotates so that the second cam 3B rotates 4 times.
Set the number of teeth at 43.45. In this case, one of the weft engagement pins A1 to A4, which acts on the weft WIC, is shifted in order for each pick of the loom as described above, but the other weft engagement pins B1 to B4 are Every other pin that acts on the weft W shifts for each pink. and weft engagement pins A1 to A4. The amount of weft W wound between B and -B4 is always 4.5 turns.

In the device of this embodiment, the number of rotations of the thread-wrapped tube that rotates during one turn of the loom is changed, and the relationship between the numbers of teeth of the gears 39.41 and 43.45 is changed correspondingly. The length measurement amount can be changed within a range of -XN (N is an integer) turns.

Another Embodiment Next, another embodiment of the present invention will be described with reference to FIG. This embodiment differs from the previous embodiment in that an auxiliary adjustment pin 62 for changing the amount of weft yarn storage is provided on the circumferential surface of the storage drum 2B. That is, storage drum 2
8, each weft engagement pin Al-A41 B1 to B
Four recesses 63 extending along the axial direction of the storage drum 28 are provided at each intermediate portion of the protruding and retracting positions of the storage drum 28, and the recesses 63 are bent into a shape corresponding to the outer surface of the length measuring section 3o. The auxiliary adjustment pin 62 is attached by a push screw 64 so as to be adjustable in its movement in the radial direction of the storage drum 2B.

In the apparatus of the above embodiment, the length measurement amount of the weft yarn is changed by 0.
In contrast to this, which could only be carried out in steps of 25 windings, in the apparatus of this embodiment, by adjusting the movement of the auxiliary adjustment pin 62, the length measurement amount can be changed continuously. Furthermore, since the auxiliary adjustment pins 62 are provided at positions that are equiangular to each other with respect to the axis of the storage drum 28, even when the length measurement amount is changed using the auxiliary adjustment pins 62, the weft can be adjusted in a circular manner. It can be wound up in a state close to that of the previous one, and weft insertion is performed well.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, the weft engagement pin may be configured to be driven by a renoid instead of being driven by a cam mechanism. With this configuration, it is possible to eliminate the trouble of changing the number of teeth of the gear in response to a change in the rotational speed of the thread-wound tube. In addition, instead of using a planetary gear mechanism to hold the storage drum 2B in a stationary state, a magnet, a weight, etc. may be used to hold the storage drum 2B in a stationary state.
It is also possible to arbitrarily change the shape, structure, etc. of each part without departing from the spirit of the present invention, such as by holding the weft in a stationary state and winding the weft by rotating the storage drum 2B. It is.

Effects As described in detail above, this invention provides information on the winding amount of the weft yarn and the direction in which the wound weft yarn is pulled out at each position obtained by dividing the circumferential length measuring portion of the storage drum into n equal parts (n is a natural number of 2 or more). In order to control the transition, a pair of weft engaging pins are provided for each of the circumferential length measuring sections that alternately appear and retract. Therefore, by changing the relative rotational speed of the yarn winding tube with respect to the storage drum, the amount of length to be measured can be controlled. When changing, the number of windings of the weft yarn on the storage drum can be changed in fractions, and the length measurement amount can be changed in small increments, which is an excellent effect.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment embodying the present invention, FIG. 2 is a partially cutaway cross-sectional view of a planetary gear portion, and FIG. 3 is a side view showing a drive mechanism of a weft engagement pin. FIG. 4 is a partially cutaway sectional view of the storage drum, FIGS. 5 to 9 are schematic perspective views for explaining the operation of the apparatus of the embodiment, and FIG.
The figure is a diagram showing the movement of the weft engagement pin, and FIG. 11 is a perspective view of the main part showing another embodiment. Rotating support shaft 8, bobbin winding tube 27, storage tram 28, side corner portion 30, weft engagement pins A1 to A4, B+ to B4゜Patent applicant Toyota Industries Corporation Representative Patent attorney On 1) Hiroshi On Figure 6 BI Figure 7 81) Figure 8N Figure 9

Claims (1)

[Scope of Claims] 1. A weft sub-length device for a fluid jet loom, in which a weft supplied from a yarn supply bobbin is wound around a weft storage drum in a coil shape, and the weft is pulled out during weft insertion,
The circumferential surface length measuring section of the storage drum is divided into 11 equal parts (a natural number of IVi2 or more), and the circumferential surface length measuring section is placed at each position to measure the winding amount of the weft yarn and the transition of the wound weft yarn in the pull-out direction. A weft length measuring device for a fluid jet loom, characterized in that a pair of weft engaging pins are provided, each of which alternately appears and retracts from a long portion. 2 The storage drum is provided with a recess extending along the axial direction of the storage drum at an intermediate portion between the protruding and retracting positions of each weft engagement bin, and each recess has an auxiliary adjustment bin extending in the radial direction of the storage drum. The weft length measuring device for a fluid injection type loom according to claim 1, characterized in that the device is equipped to be movable and adjustable.