JPS5853095B2 - Weft storage device for shuttleless looms - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drum-type weft storage device, and particularly to a device that allows the storage amount to be easily changed.

In order to solve the problem in the process of transitioning from free flying to length measuring flying during weft insertion, the following weft storage device has been proposed by the applicant (Japanese Patent Application No. 1011-1982).
74).

That is, a drum that is arranged between the yarn feeding means and the weft insertion means and rotates is formed with a tapered portion whose diameter gradually decreases toward the weft insertion means and a straight portion connected to the tapered portion, and the tapered portion and the straight portion are connected to each other. A first locking portion for locking the weft on the drum at least during the weft insertion period in relation to the loom, and a first locking portion for locking the weft on the drum at least during the weft insertion period in connection with the loom, and a first locking portion for locking the weft on the drum at least during the weft insertion period in connection with the loom. A locking device each having a second locking portion for locking the weft is provided, and the weft is wound around the straight portion between the first and second locking portions for the weft insertion length before weft insertion. It is something.

According to such a weft storage device, the weft wound around the straight part of the drum becomes the weft insertion length, so there is no process of transition from free flight to length measurement flight as in the conventional case, and there is no possibility of yarn breakage etc. due to this. This has the advantage of preventing problems.

However, when changing the weft insertion length (weaving width), it is necessary to remove the locking device inside the drum, its driving gear, etc., and then replace the drum with a drum of a different diameter, which is cumbersome.

Furthermore, there is a problem in that preparing the entire drum for replacement increases costs.

The present invention has been made with the aim of solving these problems, and includes a cylindrical drum main body having, on the outer periphery, a protrusion portion and a flat button portion corresponding to the tapered portion and the straight portion. The drum is constructed by attaching or fitting members and fixing them with fixing means as necessary, so that only the outer circumferential member needs to be replaced.

The present invention will be explained below based on the drawings.

1 to 4 show an embodiment of a weft storage device according to the present invention.

On the bracket 2 fixed to the outer surface of the frame 1 of the loom,
A lower end portion of a bracket 3 whose upper end portion is formed as a bearing portion 3a is fixed, and an intermediate portion of a hollow shaft 5 is rotatably supported within the bearing portion 3a via a ball bearing 4.

A toothed pulley 7 is fixed to the rear end of the hollow shaft 5 by a key 6, and a belt 8 with teeth f1 is wound between this pulley 7 and a driving pulley (not shown) of the loom. , the hollow shaft 5 is adapted to be rotated in conjunction with the loom.

Hereinafter, a case will be described in which the hollow shaft 5 rotates three times per one rotation of the loom.

A support ring 9 having a sliding portion 9a is fitted onto the front end of the hollow shaft 5 and is held and fixed by a fastener 11.
A length measurement storage drum 12 is attached to the lunge 10.

That is, the flange 51a of the main body 51 of the drum 12 is inserted between the base plate 13 on the front side of the flange 10, and these are fixed together with bolts 14.

An annular outer circumferential member 52 made of plastic is fitted onto the outer circumference of the cylindrical drum main body 51, and the outer circumferential surface of the outer circumferential member 52 is thickened from the rear end side to the front end side, and the outer diameter gradually decreases. The first tapered tapered portion 52a and its seedlings...
A gradually increasing taper part 521 whose outer diameter gradually increases after being connected to the α part (which has a larger diameter than the straight part 52d described later), and a second gradually decreasing taper part 52 whose outer diameter gradually decreases from the maximum diameter part.
c, and a relatively wide straight portion 52d having the same diameter and extending to the smallest diameter portion thereof.

Further, four portions 60 are formed at appropriate intervals in the circumferential direction on the gradually increasing taper portion 52b of the outer peripheral member 52, and screws 63 are inserted into the insertion holes 61 of the recesses 60 and the insertion holes 62 of the drum body 51. A nut 64 is screwed onto this screw 63 from inside the drum body 51 to fix the outer peripheral member 52 to the drum body 51 7.
These constitute the drum 12.

- On the other hand, a fixed shaft 15 is passed through the hollow shaft j5 so as to be able to rotate freely relative to the hollow shaft j5, and a boss portion 17a is attached to the rear end with a screw 16.
The tip of the lever 17, which is pressed and fixed, and the bracket 3 are connected and fixed by the stand 18, and this shaft 15
It is fixed to prevent it from rotating.

The front end of the fixing #315 passes through the center of the base plate 13, and the gear 20 is fixed to the front end with the key 19.

The gear 20 meshes with a gear 22 rotatably pivoted on a shaft 21 protruding from the base plate 13, and the gear 22 meshes with a gear 24 rotatably pivoted on a shaft 23 protruding from the base plate 13. ing.

Here, the reduction ratio between gear 20 and gear 24 is 1:3 and L7
For each revolution of the drum 12, the gear 24 revolves three times, and therefore, the gear 24 rotates once for each revolution of the loom.

A cam 25 is fixed to the side surface of the gear 24 by a stud 26, and two cam plates 27 are attached to this stand 26.
Constructed by overlapping a t 27 b a1. The cam 27 is fixed with screws 28.

The cam 25 has a high part 25A and a low part 25B, and the cam 21 has a high part 27A and a high part 27A, the phase of which can be adjusted by adjusting the overlapping position of two cam plates 27a + 27b.
and a lower portion 27B are formed.

On the other hand, a fixed shaft 29 is provided protruding from the base plate 13, and the proximal end portions of first and second hooks 30 and 31 having the same shape are movably pivoted to the fixed shaft 29.

Cam rollers 32 and 33 are attached to the intermediate portions of the first and second hooks 30 and 31.
Springs 3γ and 38 are stretched between the bolts 34 and 35 fixed at 0.31 mm and the bolt 36 fixed to the base plate 13 to bias the first and second hooks 30 and 31, and the cam rollers are 32 degrees 33 are brought into contact with the cams 25 and 27, respectively.

A first engaging part 30' and a second engaging part 31' are formed at the tips of the first and second hooks 30, 310, and a second gradually decreasing taper part of the drum 12 is formed. 52c and the straight portion 52d, and each face a transparent window (not shown) that is bored side by side in the straight portion 52d.

And the high parts 25A and 27A of the cams 25 and 27, respectively.
When the cam rollers 32 and 33 come into contact with each other, the first and second
Part 1) 1 part 30', 31' protrudes above the drum 12,
Cams 25, 270 lower parts 25B, 27B and cam roller 32
．． 33, the first and second engagements II-.

The parts 30', 31' are adapted to be drawn into the drum 12.

Of these, the cam 25, the second hook 30 with the first locking part 30' formed at the tip, the cam row 232, and the spring 37 constitute a first locking device.
A second hook 31 with a zero locking portion 31'. The cam row 233 and the spring 38 constitute a second locking device.

Reference numeral 39 is a rod-shaped guide formed with at least two grooves 39a and 39b, and is fixed to the tip of the stay 40 fixed to the bracket 3, and its axis is arranged parallel to the axis of the drum 12.

Here, the weft yarn 41 is pulled out from a yarn feeder (not shown) and passed through a tensor, and then engaged with the groove 39a of the guide 39 to be gradually tapered from the first gradually decreasing taper part 52a of the drum 12 (outer peripheral member 52). part 52b, and then engaged with the groove 39b of the guide 39 and wound around the second gradually decreasing taper part 52c and the straight part 52d of the drum 12. Locking part 30
It is inserted into the guide 42 by being engaged with at least one of ', 31'.

This guide 42 is attached to a bracket 45 fixed to a support 44 of a weft gripper 43, and is arranged in front of the drum 12 on an extension of its axis.

Then, the weft 41 is transferred from this guide 42 to a weft gripper 43.
, through the air injection nozzle 46.

In addition, the weft thread gripper 43 releases the weft thread 41 at the time of weft insertion,
The weft yarn 41 is gripped at other times, but the gripping force is weakened during beating so that the weft yarn 41 is pulled out.

47 is a warp.

To explain the operation, during the rotation of the drum 12, the weft yarn 41 is
is continuously drawn out from a yarn feeder (not shown), and the drawn-out weft yarn 41 is again wound around the second gradually decreasing taper portion 52c of the drum 12 via the guide 39.

Then, when weft insertion is completed, the first locking portion 30/
The weft yarn 41 is locked to the locking part 30' and extends over the shortest distance from there to the guide 42, and in this state, the second gradually decreasing taper part 52c
It is wrapped around the side almost once.

Immediately after this, the 20th locking portion 31' is attached to the drum 12.
As the tenth locking part 30' projects upward, the tenth locking part 30' retracts into the drum 12, and the weft yarn 41, which was wound around the second gradually decreasing taper part 52c, slides down due to its own tension and becomes the straight part 5.
2d, the locking portion changes to a second locking portion 31'.

As the beating progresses in parallel with this change in the locking portion, the weft 41 becomes tense between the second locking portion 31' and the weave edge, and at this time, the gripping force of the weft gripper 43 becomes slightly weak. Therefore, the slight slack caused by changing the locking part is removed and beaten, and then after three turns of weft are wound around the straight part 52d, the first locking part 30' protrudes and locks. Get into a standstill position.

When inserting the weft, the first and second locking parts 30',
There are approximately 3 wefts 41 in the straight part 52d between 31'
At this time, the weft gripper 43 opens to release the weft 41, and in synchronization with this, the second locking part 31/ is retracted into the drum 12, starting just before the weft gripper 43 opens. The weft yarn 41 is
is pulled out from the straight portion 52d and inserted into the opening of the warp threads 47.

Then, as described above, the weft yarn 41 extends through the shortest distance from the tenth locking portion 30' to the guide 42, and returns to its original state.

In such a weft storage device, the length of the weft 8 that is wound three times around the straight portion 52d of the outer circumferential member 52 of the first and second locking portions 30 and 31' and stored before weft insertion is 1. Since this is the weft insertion length per turn, by changing the diameter, the storage amount and therefore the weft insertion length can be changed.

That is, the outer circumferential member 52 of the drum 12 may be replaced with one having a different diameter. When replacing the outer peripheral member 52, the first and second locking portions 30' are loosened by loosening the screws 28 and shifting the cam plate 27a or 27b. , 31' are pulled into the drum 12, then loosen the nut 64 and remove the screw 63.

Thereafter, the outer circumferential member 52 is removed from the drum body 51 and replaced with another one, which is then fixed with the screws 63 and nuts 64, and the cam 27a or 27b is returned to its original state.

Therefore, compared to a system in which the entire drum 12 is replaced, replacement can be performed much more easily, and since it is only necessary to prepare several types of outer peripheral members 52, the cost does not increase so much.

5 to 9 show other embodiments of the weft storage device according to the present invention.

In this embodiment, the same parts as in the previous embodiment are given the same reference numerals, and only the different parts will be explained.

The drum 12' consists of a cylindrical drum main body 51 and a band-shaped outer peripheral member 53 made of flexible plastic and fixed to the outer periphery of the drum main body 51.

Similarly, this outer peripheral member 53 has a first gradually decreasing taper portion 53a1.
A gradually increasing taper part 53b, a second gradually decreasing taper part 53c, and a straight part 53d are formed, but the tapered part 53a
Cutout portions 53e (approximately the same diameter as the straight portion 53d) are formed at predetermined intervals in the longitudinal direction (circumferential direction 9) at t 53 b and 53 a.

The drum main body 51 and the outer circumferential member 53 are arranged such that the outer circumferential member 53 is wound around the outer circumference of the drum main body 51, and the outer circumferential member 530 is
Both ends are brought together and fixed by screwing a screw 63 into a female screw hole 64 formed in the drum body 51.

Note that there may be a gap between the abutting portions.

Furthermore, as a storage amount adjustment means, as shown in FIGS.
As shown in the figure, an adjustment body 70 formed of a round rod is inserted into an arbitrary cutout portion 53e.

The adjusting body 70 protrudes toward the straight portion 53d, and its front end is bent beyond the straight portion 53d, and its tip γOa is inserted into the insertion hole 71 in the front edge of the drum body 51.

Further, the rear end of the adjustment body 70 has a male thread γO formed therein.
b is inserted into the elongated insertion hole γ5 of the bracket 74 fixed to the flange 10 of the support ring 9 with bolts 73.
6.76' are screwed together and fixed.

When installing the outer peripheral member 53, first fix one end of it to the drum body 51 with a bolt 63 and a nut 64, and then
Wrap it around the drum body 51, and sequentially tighten the bolt 63 and throat 6.
4, but since there is a cutout part 53e at this time,
Since it is easy to bend in that part, it is easy to wrap it around the outer periphery of the drum body 51.

Therefore, if several types of outer circumferential members 53 having different thicknesses are provided, the storage amount can be easily changed by replacing them.

Alternatively, the outer circumferential member 53 may be of one type and its diameter may be changed by wrapping, for example, a thin cloth on the drum body 51 to an appropriate thickness.

In addition, by forming such an outer circumferential member 53 to a predetermined length during manufacturing, if the diameter of the drum body 51 changes but becomes smaller, a part of it can be cut and used. There are advantages.

Furthermore, this embodiment has the advantage that it is not necessary to adjust the cam plate 27a or 27b when attaching or detaching the outer circumferential member 53, making the operation simple.

Moreover, when changing the storage amount to a small or medium level, the number of adjusting bodies 70 may be increased or decreased.

This is because the weft yarn 41 is wound around the outer circumferential member 53 and the adjustment body 70 and stored, so the storage length becomes longer as the number of adjustment bodies 70 increases.

In the embodiment shown in FIGS. 1 to 4, the outer circumferential member 52 is made of rubber and its inner diameter is smaller than the outer diameter of the drum body 51, and the elastic force of the rubber allows the outer circumferential member 52 to be attached to the drum body 51. It may be fixed to

In this case, if a cutout part 53e is formed in a part of the taper as in the embodiment shown in FIG. This has the effect of making it easier to attach the adjustment body 70.

As explained above, according to the present invention, there is no need to replace the entire drum when changing the storage amount, and only the outer peripheral member needs to be replaced, making the replacement work extremely easy. You only need to prepare several types, so the cost won't be too high.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, FIG. 1 is a front view, FIG. 2 is a front view of the main part with the drum removed, and FIG. 3 is a front vertical sectional view of the main part. , Figure 4 is a right side view of the main part, Figure 5
9 to 9 show other embodiments of the present invention, FIG. 5 is a front view, FIG. 6 is a front vertical sectional view of the main part, FIG. 7 is a right side view of the main part, and FIGS. The figures are a front longitudinal sectional view and a right side view of the main part showing how the storage amount is changed in the same way. 12.12'...Drum, 30'...10th locking part, 31'...20th locking part, 41...Weft, 51...
...Drum body, 52, 53...Outer peripheral member, 52c
, 53c...Tapered part, 52d, 53cl=Straight part, 53e... Cutting part, 70... Adjustment body.

Claims (1)

[Scope of Claims] 1. A rotating drum disposed between a yarn feeding means and a weft insertion means is provided with a tapered portion whose diameter gradually decreases toward the weft insertion means and a straight portion connected to the tapered portion, A tenth locking portion is provided near the boundary between the tapered portion and the straight portion to lock the weft on the drum at least during the weft insertion period in association with the loom, and a tenth locking portion is provided in the straight portion in connection with the loom at least except during the weft insertion period. In a weft storage device for a shuttleless loom, the drum is provided with a locking device each having a second locking portion for locking a weft on the drum, and the drum is detachably attached to a cylindrical drum body and its outer periphery. What is claimed is: 1. A weft storage device comprising: an outer circumferential member fixed to the weft portion to form the tapered portion and the straight portion; 2. The weft storage device according to claim 1, wherein the outer peripheral member is annular and is fitted and fixed to the drum body. 3. The weft storage device according to claim 1, wherein the outer circumferential member is band-shaped and is wound and fixed around the drum body. 4. Cutting portions are formed in the tapered portion of the outer circumferential member at appropriate intervals in the circumferential direction, and a rod-shaped adjustment body is provided in any of the cutting portions and protrudes toward the straight portion.
The weft storage device according to any one of items 1 to 3.