JPS632447Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field This invention relates to a selvage forming device, and in particular, when forming the selvage of a woven fabric using four spools, the held eye for distributing the selvage is placed on a horizontal plane. The present invention relates to a device for driving an aperture with a predetermined phase difference.

Prior Art An example of the above-mentioned ear rim forming device is the one proposed by the present applicant in Utility Model Application No. 1983-78616.
In the device of this prior application, the first and second heald frames connected to open the flat are arranged in parallel in the front and back, and the rear part of the second heald frame is arranged such that the second heald frame moves when the opening is opened. A heald eye for distributing thread warp is provided which moves up and down with a phase difference with respect to the first heald frame, and upper and lower needles each having a thread guiding hole for ground warp are fixed to the first heald frame. The 2-heald frame has a pair of upper and lower thread guide diagonal grooves formed therethrough, and when the shed is completely closed, these thread guide diagonal grooves extend to the left and right of the needle. It is structured like this.

At the time of opening, due to the phase difference movement between the second heald frame and the heald eye for distributing the stroke, the yarn is guided by the diagonal groove of the second heald frame and is restrained by the needle of the first heald frame. It is divided into the left and right sides of the geology.

By the way, in connection with this distribution work, it is desirable that the heald eye for strain distribution be as close to the second heald frame as possible. This is because if the two are far apart, even if the heald eye makes a phase difference movement with respect to the second heald frame, the heel meridian will be guided by the thread guide diagonal groove and will not move reliably. Therefore, the distribution work tends to be uncertain. This is the same reason that warp shedding cannot be performed reliably if the heald frame is far from the most retracted position of the reed.

Even so, it is possible to ensure the sorting work by increasing the opening amount (movement distance) of the heald eye, but this is not preferable as it puts strain on the thread.

It is possible to increase the phase difference in the movement of the heald eye, that is, to increase the leading angle or the trailing angle, but this would increase the bending of the yarn between the yarn guide diagonal groove of the second heald frame and the heald eye. This is also undesirable as it puts strain on the warp threads.

After all, in order to reliably perform the retrieval warp distribution work without putting strain on the yarn with the above-mentioned device, it is a prerequisite that the retrieval warp distribution heald eye be brought as close to the second heald frame as possible.

By the way, in the above-mentioned application, as methods for imparting phase difference motion to the heald eye for strain distribution, (i) a method in which the heald eye is supported by a third heald frame, (ii) a method in which the heald eye is supported by a rotating disk,
(iii) A method in which the hell eye is supported by a mechanism including a planetary gear, and (iv) A method in which the hell eye is supported by an arm connected to a cam operation.

When using the third heald frame, it is conceivable that the third heald frame is placed in the third frame from the viewpoint of ease of threading the thread and space considerations. In this case, the heald frame for the warp (ground thread) of the actual woven fabric will be the fourth frame or later, and will be located far from the woven fabric. This is not desirable from the point of view of opening movement. Therefore, the third heald frame has to be the farthest frame from the fabric. However, if you place the third heald frame in such a position,
Naturally, the heald eye for heald warp distribution and the thread guiding oblique groove of the second heald frame will be separated by a large distance.
As mentioned above, the distribution work becomes uncertain. Furthermore, the crank flat-opening mechanism has the disadvantage that the third heald frame has a leading angle and is separated from the third heald frame. If you use a cam opening mechanism, you can set a leading angle, but changing the leading angle is cumbersome. This is because a changing mechanism for moving a heavy object such as a heald frame needs to have a more rigid structure.

Next, in the case of using a rotating disk, as mentioned above, it is preferable to provide the heald frame near the most retracted position of the reed in order to ensure the warp shedding. Therefore, the rotating disk must be provided far behind the second frame. This is because if the rotating disk is brought close to the weft, it will collide with parts of the weft beating mechanism such as the reed. Therefore, in this case as well, the heald eye for heel distribution, which is supported by the rotating disk, and the yarn guide diagonal groove of the second heald frame are separated by a large distance.
As mentioned above, it is inevitable that the distribution work will be uncertain.

Although the mechanism including the planetary gear is an improvement on the system using a rotating disk, it is completely common in that it must be provided at a distance to the rear of the second frame. Therefore, it still has the disadvantage that the distribution work is not reliable.

Summary of the invention The purpose of this invention was to form the selvage of a woven fabric using a four-pole structure, without putting strain on the threads or making it difficult to change the phase difference, and in addition, to reduce the thread vibration. The goal is to ensure that each minute's work is done reliably.

In this invention, a heald eye for heel distribution, which is supported by one end of the swinging arm, is located immediately behind the diagonal groove for guiding the yarn in the stay of the second heald frame,
The arm is made to swing in substantially the same direction as the stay, and a fastening element that can change the fastening position is interposed in the rotation transmission system between the drive shaft from the loom and the heald eye. be.

Embodiment FIG. 1 shows one embodiment of the selvedge forming device of this invention, and is the one on the left side when viewed from the front of the loom. The one on the right side has substantially the same configuration except that the left and right sides are reversed, so a description thereof will be omitted.

The device of this invention is constructed in association with two pairs of front and rear heald frames 1 and 2 and a heald eye E for distributing the strokes provided on the rear side. The first and second heald frames 1 and 2 are connected to form a flat opening. That is, if the first heald frame 1 goes up, the second heald frame 2 goes down. Further, the heald eye E moves in advance or in a backward motion in substantially the same direction as the second heald frame 2 with a certain phase angle (crank angle) difference.

A pair of upper and lower support rods 10 and 11 are provided horizontally across the entire width of the first heald frame 1, and fixedly support support blocks 12 and 13, respectively. Needles 14 and 15 extend coaxially in the vertical direction from these support blocks 12 and 13, respectively, and their ends are opposed to each other at a distance from each other approximately in the center between the top and bottom. In addition, ground warp thread guide holes 141 and 151 are formed in the end portion so as to be vertically aligned. A stay 16 fixed between the upper and lower support blocks 12 and 13 has a pair of upper and lower thread guide holes 161 and 162 formed approximately in the center thereof.
Further, yarn guide pins 121 and 131 are fixed to the front surfaces of the upper and lower blocks 12 and 13.

A pair of upper and lower support rods 20 and 21 are provided horizontally across the entire width of the second heald frame 2, and fixedly support support blocks 22 and 23, respectively. At approximately the vertical center of the stay 24 fixed between the upper and lower support blocks 22 and 23, a pair of diagonal grooves 241 and 242 are formed so as to pass through from the front and back, spaced apart from each other. These thread guiding oblique holes 24
No. 1,242 is inclined in the opposite direction when viewed from the front. Note that when the shed is completely closed, the yarn guide oblique grooves 241 and 242 on the stay 24 extend to the left and right of the upper and lower needles 14 and 15.

The heald eye E for strain distribution is driven to move up and down by a swing arm 31 which is a part of the drive mechanism shown in FIG.

The ground warp g connected to the selvedge of the woven fabric is the yarn guiding hole 161,1
62, passes through the thread guide pins 121, 131, reaches the needle thread guide holes 141, 151, and runs to the weaving opening. Similarly, the thread t runs from the heald eye E to the weaving opening via the yarn guide diagonal grooves 241 and 242.

Next, as shown in Figure 2, hold the held eye E for distribution.
A driving mechanism was established.

A gear 37 tightly fitted to a rotating shaft 35 supported by a bearing 33 is rotationally driven by a drive shaft (not shown) of the loom. A main shaft 39 is further rotatably supported on the bearing 33, and a gear 41 tightly fitted to one end of the main shaft 39 meshes with the gear 37 described above.

A gear 45 is fixed to the other end of the main shaft 39 by a fastening element 43 so that its phase with respect to the crank angle can be changed. In the illustrated example, the fastening element is a half boss.

Slide base 4 extending in the same direction as the main shaft 39
A bearing 49 is fixed to 7 so that its position can be changed depending on the position of the ear. A slave shaft 51 parallel to the main shaft 39 rotatably supported by this bearing 49
A gear 53 is firmly fitted in the . This gear 53 meshes with a gear 45 on the main shaft 39. Further, the bearing 49 supports the central portion of the swing arm 31 .

An eccentric cam is integrally provided on the back side of the gear 53, which does not appear in the drawing, and a collar 55 fitted into the eccentric cam is connected to the lower end of the rod 57.

As mentioned above, the heald eye E is supported at the other end of the swing arm 31. Only one held eye E may be used to pass two sutras together as shown in Figure 1, or two Held Eyes can be used as shown in Figure 2.
It is also possible to use them individually to pass one sutra each. The other end of the swing arm 31 is connected to the rod 57.
Connect to the top of the .

In the initial setting, for example, the drive shaft of the loom is set to a crank angle of 0, the gear 45 is released from the main shaft 39 by the fastening element 43, and the main shaft 39 is turned by an angle corresponding to the desired phase difference (plus/minus). , the gear 45 is again fastened to the main shaft 39 by the fastening element 43. As a result, the rotation transmission system after the gear 53 is of course also initialized.

Therefore, when the drive shaft of the loom is rotated, the second heald frame 2 having the yarn guide diagonal grooves 241 and 242 naturally moves up and down in the same phase, while the swing arm 3
The heald eye E supported by the heald eye 1 moves up and down with a set phase difference relative to it. As a result of such a phase difference movement, the stroke meridian t is naturally distributed to the left and right sides of the earth meridian g.

Similar to the initial setting, changing the phase difference is performed by loosening the fastening element 43.

As described above, according to this invention, the swing arm 31
Heldeye E is operatively connected to the cam via. In this case, since the load applied to the swinging arm 31 is only the weight of the two winding warps, this can be made thinner.
There is no problem in installing it very close to 2. Therefore, the work of sorting out the sutras becomes reliable. Further, the phase difference can be changed extremely easily by simply loosening the fastening elements.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the ear rim forming device of this invention, and FIG. 2 is a perspective view showing its heald eye drive mechanism. 1...First heald frame, 141, 151...
...Ground warp thread guide hole, 2...Second heald frame, 24
1,242... Diagonal groove for guiding yarn for retraction warp distribution, E... Heald eye for retraction warp distribution, 31... Swinging arm, 4
3... Concluding element, g... Geo-kei, t... Umi-kyo.

Claims (1)

[Claims for Utility Model Registration] First and second heald frames 1 and 2 connected to form a flat opening are arranged in parallel in the front and back, and on the first heald frame, there is a thread guiding hole for ground warp, On the second heald frame, there is a diagonal groove 24 for guiding threads.
1,242 are provided in each pair, and when the shed is completely closed, the yarn guiding groove extends to the left and right of the yarn guiding hole for the ground warp, and the yarn guiding groove is immediately adjacent to the yarn guiding groove. At the rear, a heald eye E for weaving is supported on a swinging arm 31 that moves up and down with a predetermined phase difference in substantially the same direction as the second heald frame, and the swinging arm and the drive shaft of the loom are supported. A fastening element 43 for changing the above-mentioned phase difference in the rotation transmission system between
An ear rim forming device characterized by being provided with.