JPH0262613B2 - - Google Patents

Description

[Detailed description of the invention] Depending on the type of twist of the selvage thread used in the shuttleless planetary gear type selvage assembly device, the selvage thread itself may be S-twisted or Z-twisted when the selvage thread is unwound from the bobbin. It is important to select the optimal twist between twisted and non-twisted to make the selvage strong, but this invention allows you to easily select between these three types of twisting, and also allows you to control the number of twists. This is a mechanism that allows changes. The selvage bobbin holding part is connected to a yarn guide that guides the selvage yarn unwound from the selvage yarn bobbin in the weaving direction while rotating on a rotating disc for shedding in order to equalize the selvage yarn tension. In a planetary gear type selvage tying device, which rotates independently and is further provided with a forward/reverse device, a mechanism for stopping the drive, and a change gear mechanism that can change the number of twists in the rotation drive part of the selvage bobbin holding part. This invention relates to a selvage thread twisting mechanism.

In this type of conventional planetary gear type selvage assembly device, as shown in FIGS. 1a to 1e, yarn guides 1,
1' is designed to move the selvage yarn up and down on a substantially straight line in order to minimize fluctuations in the selvage tension due to the revolution of the yarn guide itself. The gears 3 and 3' to which the bobbin is attached rotate twice. In such a device, (1) In a system in which the selvage bobbin rotates together with the yarn guide, when the shedding turntable rotates once so that one twist is applied between two selvage threads, the selvage thread itself is always twisted. Each thread is twisted twice, and the direction of twisting is determined by the direction of rotation of the shedding rotary disk. Therefore, in this method, the direction of twisting can be freely selected by changing the direction of rotation of the shedding rotary disk, but it has the disadvantage that the number of twists cannot be changed.

(2) In the system in which the selvage bobbin holding part is rotated by the shedding rotary disk, the selvage bobbin does not rotate even if the shedding rotary disk rotates once, so the selvage yarn itself is not twisted. Therefore, it is only necessary that the selvage yarn itself has an appropriate twist, but if the selvage thread itself is not twisted, the selvage portion will not be formed satisfactorily.

The purpose of this invention is: (1) By making it possible to freely change the twisting direction of the selvage yarn itself, it is possible to prevent thread breakage by twisting the selvage yarn of Ispan (in the untwisting direction, (b) Giving the selvage yarn itself a twist that matches the entanglement direction, that is, twisting the selvage yarn in an appropriate direction, usually in the opposite direction to the two twisting directions. By twisting, the torque generated by twisting the two selvage threads can be eliminated and the selvage can be made neatly.

(2) By providing a mechanism that applies an appropriate number of twists to the selvage yarn itself, (a) no twist is applied if the selvage yarn already has an appropriate twist; and (b) by twisting of the selvage yarn. The number of twists is applied so that the resulting torque is reduced. For example, the ear thread is S.
When twisting into a twist, the selvage thread itself should undergo approximately one Z twist for each twist of the selvage thread (for double threads such as sewing thread, the direction of the lower twist and upper twist is It is based on the same principle as applying approximately the same number of twists to eliminate the torque).
etc.

Next, to describe the mechanism of this invention in detail, FIG. 2 shows it, and an opening rotary disk 2 having a gear E on the circumferential side is rotatably attached to a rotary pin P, and this gear E is connected to a drive gear D. driven by. S is its drive shaft. A fixed gear A is fixed to this fixed pin P as a sun gear, and an idle gear is symmetrically engaged with the fixed gear A from both sides, as shown in FIG. B ₁ and B ₂ are rotatably provided by separate fixed pins, and gears C ₁ and C ₂ become planetary gears with respect to fixed gear A in a state in which they mesh with these idle gears B ₁ and B _2. It is attached so that it can rotate.

The bobbin holder shafts S ₁ and S ₂ pass through the shedding rotary disk 2 and are rotatably supported by the shedding rotary disk 2 by bearings b and b'.
Gears H ₁ and H 2 are fixed to one end of the bobbin holder shafts S ₁ and S ₂ , and these gears H ₁ and _{H 2 are} used for opening by a combination of gears shown in FIGS. 4 and 5, which will be described later. It is rotated by the rotation of the rotary disk 2.

Again, in FIG. 2, bobbin holders 4 and 4' are fixed to the other ends of the bobbin holder shafts S ₁ and S ₂ , which hold bobbins 3a and 3a' for the selvage threads, and increase the tension of the selvage threads. As a result, the selvage thread bobbins 3a, 3a' are rotated, and the selvage thread y is let out. Gears C ₁ and C 2 are connected to bearings b ₁ and _{2 on the bobbin holder side of bobbin holder shafts S 1 and S 2 , respectively} .
Bobbin holder shaft S ₁ through b ₂ , b ₁ ′, b ₂ ′,
Yarn guides ₁ and 1' are rotatably supported on gears C ₁ and C ₂ and are fixed to the gears C 1 and C 2 for shedding movement of the selvage yarn y by rotation of the shedding rotary disk (second The figure is a cross section taken along the line -' in FIG. 3, so bearings b', _b1 ', _b2 ', bobbin 3a' for selvage yarn, and bobbin holder 4' are not shown.)

The gear arrangement that drives the yarn guides 1 and 1' is shown in Figure 3, where the number of teeth of gears C ₁ and C ₂ is half the number of teeth of fixed gear A, and the number of teeth of gears C 1 and C ₂ is half that of fixed gear A. ，
By engaging the idle gears B ₁ and B ₂ between the yarn guides 1 and C ₂ , the yarn guides 1 and 1' can move approximately in a straight line as described in the explanation of FIGS. 1a to 1e.

On the other hand, the device for rotating the bobbin holders 4, 4' in order to change the direction in which the selvedge yarn y is twisted has a rotating gear F as a sun gear fixed to a fixed pin P, and a rotary gear F as a sun gear is fixed to a fixed pin P, and a rotary gear F as a sun gear is fixed to a fixed pin P. The freely attached bobbin holder shafts S ₁ and S ₂ have gears.
H ₁ and H ₂ are fixed.

First, when changing the twist direction and applying an S twist to the selvedge yarn, as shown in Fig. 4, the fixed gear F and the gear H ₁ ,
Connect the twist direction changing gears G ₁ and G ₂ between H ₂ and Z to the selvage thread.
When twisting, as shown in Fig. 5, twist direction changing gears G 1 and G 2 are engaged between fixed gear F and gears H _{1 and} H ₂ via idle gears J ₁ and _{J 2 .} Change the twist direction by In addition, if the number of twists is not changed, the twist direction changing gears G ₁ and G ₂ gears H ₁ and H ₂
Alternatively, completely disengage the idle gears J ₁ and J ₂ , and insert pins a and a' into the opening rotary disk 2 to completely prevent the rotation of the gears H ₁ and H ₂ .
It meshes with the teeth of gears H ₁ and H ₂ to prevent rotation. (Figure 6). Furthermore, in order to change the number of twists, the device for changing the rotation speed of the bobbin holders 4, 4' is a cylindrical part centered on the rotation axis of the shedding rotary disk 2, as shown in FIGS. 7 and 8. A rotatable chain gear arm 5 is inserted as a guide surface.
This change gear arm 5 has slots 10, 10', 8, 8' drilled symmetrically with respect to its center point in the circumferential direction at the tip and in the radial direction at the arm. , long holes 10, 10' are set bolts 9,
9', and the elongated holes 8 and 8' have twist direction changing gears G ₁ and G ₂
The sliding pin 7 rotatably supports the
7' are inserted through each.

When changing the number of twists, use the set bolt 9,
9' and nuts 6, 6' and remove the twist direction changing gear.
Disengage the gears G ₁ and G ₂ from other gears, replace the fixed gear F with the number of teeth that matches the number of twists, and replace the twist direction changing gears G ₁ and G ₂ with the gears F and H ₁ again.
H ₂ and tighten the nuts 6, 6' and set bolts 9, 9' to fix it to the opening rotary disk 2 (corresponding to applying S twist).

In addition, the circumferential length of the elongated holes 10 and 10' is
The twist direction changing gears G ₁ and G ₂ can also be used as a twist direction changing mechanism by making the dimensions necessary for movement to mesh with the gears H ₁ and H ₂ or the idle gears J ₂ and J ₂ , respectively.

The present invention has the following effects due to the above-described structure and operation. First, since the twist direction and number of twists of the selvage threads can be arbitrarily selected, the conditions for the number of twists of the selvage threads on both sides of the fabric can be made the same, and since both selvages are of the same quality, even after the finishing process of the fabric is completed, the left and right sides can be The quality of the selvage portions becomes the same, which makes it possible to produce high-quality cloth. In addition, it can be twisted if necessary, so cotton yarn is especially useful for selvedge yarns (required for cotton fabrics).
When used, strong selvage thread can be obtained and a firm selvage can be made.

[Brief explanation of the drawing]

FIGS. 1 a to 1 e are explanatory diagrams showing the operation of the conventional device;
FIG. 2 is a longitudinal cross-sectional view of the device according to the invention (partly taken along the -' section in FIG. 3 and partly taken along the -' section in FIG. Fig. 3 is a side view as seen from the right side of Fig. 2, showing the arrangement of the gears that drive the yarn guide, and Fig. 4 is a side view as seen from the left side of Fig. 2, showing the arrangement of the gears that drive the yarn guide. Figure 5 is a side view from the left side of Figure 2, which shows the gear layout that drives the bobbin holder shaft when applying a Z twist to the selvage yarn. , Figure 6 is a gear arrangement diagram when the bobbin holder shaft is not rotated and the selvedge yarn itself is not twisted, Figure 7 is a diagram with a chain gear arm attached to change the number of twists and the direction of twist. FIG. 8 is a sectional view taken along the line -' of FIG. 7. 1, 1'... Yarn guide, P... Fixing pin,
2... Opening rotary disk, A, F... Fixed gear, C ₁ ,
C ₂ ′... (planetary) gear, S ₁ , S ₂ ... bobbin holder shaft, 3a, 3a'... bobbin for selvage thread, y...
Selvage thread, G ₁ , G ₂ ... Twisting direction changing gear, a, a'...
Pin, 5...Change gear arm.

Claims (1)

[Scope of Claims] 1. A planetary gear type selvage assembly device for a shuttleless loom having a yarn guide that guides the selvage yarn unwound from the selvage yarn bobbin in the direction of the weaving front while rotating on a rotating disc for shedding, The selvage yarn bobbin is mounted on a bobbin holder shaft supported by the shedding disk, and the yarn guide is rotated by a planetary gear loosely fitted to the bobbin holder shaft and fixed to the bobbin holder shaft. A selvage assembly device characterized in that a rotation transmission mechanism having a reversal mechanism and a change gear mechanism is provided between the gear and the sun gear fixed to a fixing pin that pivotally supports the rotary disc for opening. 2. The selvage assembly device according to claim 1, wherein the rotation transmission mechanism includes a transmission interrupting mechanism and a mechanism for locking rotation of the bobbin holder shaft.