JPH0748749A - Device for adjusting tension of selvedge yarn of weaving machine - Google Patents

Abstract

PURPOSE:To provide an adjusting device for stably sending out selvedge yarn without being influenced by inertia even in a high-speed operation, capable of preventing wear damage caused by sliding of a hook part caught by a spring. CONSTITUTION:A ratchet 20 is protrusively attached to one end of a base shaft 18 in such a way that the ratchet is geared with a ratchet wheel. A supporting shaft 16 is rotatably equipped with a bracket 21 having a face 23 of a circular arc with the same curvature radius as that of the supporting shaft 16 in part of the outer periphery. The face 23 of a circular arc is protrusively provided with a stopper 23a and cloth 24 is caught by the stopper. A spring 25 is connected to the other end of the cloth 24. The end of the spring 25 is engaged with a hook 26 and the hook 26 is caught by a supporting part 27 protrusively fixed to the interior of a bobbin holder 10. The spring 25 is forced to always stretch the cloth 24 toward the supporting part 27. When a tensor arm 22 is rotated, the spring 25 is moved only in the expansion and contraction direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a selvage yarn tension adjusting device for a loom.

[0002]

2. Description of the Related Art As a device for forming a selvage portion of a loom, a rotary heaping device is generally used in which a pair of bobbin holders having selvage yarn bobbins are arranged at both ends of the loom. This rotary mower has a sun gear equipped with a pair of selvage thread bobbins and a planetary gear arranged on the side surface of the sun gear.The sun gear rotates in a direction opposite to the rotation direction of the planetary gear. It makes an orbital motion and sends out the selvage. The selvage yarn is sent out passively by the ratchet mechanism.

As an example of this device, the actual construction of Shokai 56-15
A selvage yarn feeding device using a bobbin holder disclosed in Japanese Patent No. 1382 is known. This bobbin holder will be described with reference to FIGS. In FIG. 9, the bobbin holder 51
The selvage yarn M sent from the selvage yarn bobbin 52 rotatably attached to the cloud yarn guide 54 is rotatably disposed on the support shaft 53, and the tensor is also rotatably disposed on the support shaft 53. It is arranged via a tensor arm 56 protruding from the arm supporter 55. Tensor arm 56
The selvage yarn M passing through is passed through the binding arm 57 protruding from the bobbin holder 51 and stretched over the selvage of the woven fabric.

A ratchet wheel that rotates integrally with the selvage yarn bobbin 52 meshes with a pawl 58 projecting from the cloud yarn guide 54, and the ratchet wheel and the pawl 58 constitute a ratchet mechanism. Projection 55a of tensor arm supporter 55
A spring 60 is stretched between the supporting portion 55b protruding from the upper end and the supporting portion 59 protruding from the bobbin holder 51. As shown in FIG. 10, hooks 60a and 60b formed at the ends of the spring 60 are hooked on the support portions 55b and 59, respectively.

When the selvage yarn M is pulled in the direction of arrow A in FIG. 9, the tension of the selvage yarn M increases and the tensor arm 56 is pulled toward the binding arm 57. In order to reduce the tension of the selvage yarn M, the tensor arm supporter 55 is rotated in the direction in which the tensor arm 56 is pulled and the spring 60 is pulled. That is, since the tensor arm supporter 55 and the spring 60 move from the position shown by the broken line in FIG. 10 to the position shown by the solid line, the spring 60 is also extended from the length of the broken line to the length of the solid line.

When the spring 60 is extended by a predetermined value or more, the tensor arm 56 presses the cloud yarn guide 54. That is, the tensor arm 56 presses the cloud yarn guide 54 against a certain amount of extension of the spring 60, the pawl 58 is disengaged from the ratchet wheel, and the selvage yarn M is delivered. When the selvage yarn M is delivered by a predetermined amount, the extension force of the spring 60 becomes larger than the tension of the selvage yarn M, and the contracting force of the spring 60 causes the pawl 57 to mesh with the ratchet wheel again. Each time the selvage yarn M is delivered and the spring 60 expands and contracts, the hook 60b slides on the outer peripheral portion of the support portion 59.

[0007]

By the way, the support portion 55b supporting the spring 60 on the tensor arm supporter 55 side is disposed at a position apart from the support shaft 53 which is the rotation center of the tensor arm supporter 55. ing. Therefore,
Each time the tensor arm supporter 55 rotates, the spring 60
In the center of the circle, the support portion 59 is centered in the circumferential direction (see FIG.
In the direction of the arrow), an inertial force other than the stretching direction acts.

This inertial force appears unevenly regardless of the elastic force of the spring 60 and the like. Then, this inertial force is generated by the spring 60.
Acts as a force to bend the spring outward, so that the apparent elastic force of the spring 60 rises unevenly. When the apparent elastic force rises, the amount of extension of the spring 60 with respect to the elastic force also increases nonuniformly, so that the delivery of the selvage yarn M with respect to the tension varies. Since the tension of the selvage yarn M sent out is always larger than the set tension and is unstable, the selvage portion is stronger than the set state, and the selvage is unevenly wrinkled, which causes wrinkles in the selvage portion and deteriorates the quality of the woven fabric. There is a problem of causing it.

Further, this inertial force is equal to the rotational speed of the loom, which is 2
Since it increases in proportion to the power of the power, it appears remarkably especially at high speed operation. The present invention has been made to solve the above problems, and an object thereof is to provide a mooring device capable of stable delivery of selvage yarns without being affected by inertial force even during high speed operation. Especially.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention according to claim 1 fits the selvage thread bobbin in the axial direction in a pair of bobbin holders arranged laterally of the loom. And a support shaft parallel to the axis of the bobbin holder is rotatably disposed, a tension-sensing arm is projectingly provided from the support shaft, and the ratchet wheel is disposed integrally rotatably on the selvage thread bobbin and the support shaft. In a twisting device in which a stop claw that meshes with the ratchet wheel is provided at one end of the shaft, a part of the bobbin holder and the outer periphery of the support shaft are circulated and fixed by an elastic body.

According to a second aspect of the present invention, one end of the flexible connecting member is arranged around the outer periphery of the support shaft, and the other end is an end portion of an elastic body attached to a part of the bobbin holder. Connected with. According to the third aspect of the present invention, a support member having at least a part of the outer periphery of an arc is rotatably disposed on the fixed support shaft, and a tension-sensing arm is projected from the support member. The part and the support member were circulated and connected by an elastic body.

According to a fourth aspect of the present invention, a support member at least a part of the outer periphery of which is arcuate is fixed to the rotatable support shaft, and a tension-sensing arm is projected from the support shaft to form a part of the bobbin holder. And the support member was circulated and connected by an elastic body.

[0013]

Therefore, according to the first aspect of the invention, when the selvage yarn in the bobbin holder is pulled out and the tension increases, the elastic body does not slide at the connecting portion with the connected bobbin holder. Further, since the connecting portion circulated on the support shaft always moves along the peripheral surface, it does not slide like swinging and is stretched in the direction in which the tension of the selvage yarn is reduced in the expansion / contraction direction of the elastic body. . The tension-sensing arm protruding from the support shaft is rotated by the extension of the elastic body. When the support shaft is rotated by a predetermined amount, the pawl disposed on the support shaft is also rotated, the engagement between the pawl and the ratchet wheel is disengaged, and the selvage yarn is delivered so as to have a predetermined tension. . When the tension becomes a predetermined value, the stop claw meshes with the ratchet wheel due to the contraction of the elastic body, and the supply of the selvage yarn is stopped.

According to the second aspect of the invention, the curved surface of the outer periphery of the rotatable support shaft is covered with a flexible connecting member,
The elastic body is always linearly connected between the spindle and the bobbin holder. Therefore, both ends of the elastic body are expanded and contracted in the expansion and contraction direction of the elastic body at the connection portion of the connecting member and the bobbin holder without sliding like swinging. Claim 3
According to the invention described in (1), a rotatable support member having at least a part of its outer circumference is rotatably disposed on the fixed support shaft, and the arc-shaped outer circumference of the support member and one end of the bobbin holder are connected to each other. Since the elastic body is connected, the elastic body is not swung up even if the rotation of the support shaft is small, and is greatly expanded and contracted only in the expansion and contraction direction.

According to the invention described in claim 4, the support member is fixed to the support shaft, and when the support shaft is rotated, the elastic body is expanded and contracted only in the expansion and contraction direction thereof.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment embodying the present invention will now be described with reference to FIGS.
It will be described with reference to FIG. FIG. 1 is a schematic view showing one of the rotary twisting devices arranged one by one on the side surface of the loom.
2 to 4 and 6 show a state in which a spring described later is extended,
Fig. 7 shows the selvage thread bobbin with the ratchet disengaged from the ratchet wheel and the selvage yarn is delivered. Figure 5
Shows a state in which the ratchet meshes with the ratchet wheel with the spring compressed.

In the rotary shedding device 1 shown in FIG. 1, a gear 3 is fitted on a shaft 2 projecting from a frame of a loom.
The gear 3 meshes with the drive gear 4 and is always rotated in the direction of arrow C. The sun gear 5 is fixed to the shaft 2 on the side surface of the gear 3, and the intermediate gear 6 is sandwiched on both sides so as to sandwich the sun gear 5.
Are arranged, and each intermediate gear 6 is meshed with the planetary gear 7. The sun gear 5, the intermediate gear 6, and the planetary gear 7 are rotatably arranged on the side surface of the gear 3. The bobbin holder 10 is fixed to the side surface of the planetary gear 7. Since the sun gear 5 has twice as many teeth as the planet gear 7, when the sun gear 5 makes one rotation in the direction of arrow C, the planet gear 7 makes two rotations in the direction of arrow D. That is, the bobbin holder 10 revolves around its own axis while rotating so that the tension of the selvage yarn M delivered from the selvage yarn bobbin 11 of the bobbin holder 10 becomes constant.

One of the bobbin holders 10 shown in FIG. 1 is shown in FIG.
Shown in. The selvage thread bobbin 11 having a hollow shaft 11 a is mounted on the bobbin holder 10. A leaf spring 12 is provided on one side surface of the bobbin holder 10, and a rod stopper 13 having a key-like stop surface is formed on the opposite side surface of the bobbin holder 10. The rod 14 is the hollow shaft 1 of the selvage thread bobbin 11.
1a is penetrated and abutted against the leaf spring 12, and the rod stopper 1
The head 14a of the rod 14 is locked to the rod 3. In other words, the selvage yarn bobbin 11 is rotatably attached to the bobbin holder 10 by pressing the head portion 14 a against the rod stopper 13 by the elastic force of the leaf spring 12.

When the selvage thread bobbin 11 is mounted on the bobbin holder 10, a ratchet wheel 15 as a ratchet wheel is provided at the end of the selvage thread bobbin 11 on the side where the leaf spring 12 is disposed (right side in FIG. 2). It is integrally formed. In FIG. 2, a cylindrical base shaft 18 is rotatably fitted to a support shaft 16 which is disposed above the rod 14 and penetrates the bobbin holder 10 via two bushes 17, 17. .
The base yarn 18 is integrally formed with a cloud yarn guide 19 having a threading hole 19a formed in an upper portion thereof. On the left side of the cloud yarn guide 19, a protrusion 19b as a locking portion is provided.

At the end of the base shaft 18, a ratchet 20 as a pawl can be engaged with the ratchet wheel 15,
It is projected from the base shaft 18. Furthermore, in FIG.
On the left side of the support shaft 16, there is rotatably provided a resin bracket 21 as an arc-shaped support member having a part of the outer circumference having the same radius of curvature as the support shaft 16. A protrusion 21a is formed on the bracket 21 at a position where it can come into contact with the protrusion 19b. A tenser arm 22 serving as a tension-sensing arm is provided upward with the bracket 21 as a base end.

As described above, the arcuate surface 23 is integrally formed on the outer periphery of the bracket 21. The arcuate surface 23 is provided with a stopper 23a. In addition, a hole 24a formed at one end of the cloth 24 as a flexible connecting member
Is fitted to the stopper 23a, and the cloth 24 is smoothly attached to the arcuate surface 23 in a circular manner. The other end of the cloth 24 has a hole 2
4b is formed, and one end of a tension spring 25 as an elastic body is arranged in the hole 24b. The hook 26 at the other end of the spring 25 is hooked on a support portion 27 projecting from the inner surface of the bobbin holder 10.

Since the cloth 24 is always slid along the arcuate surface 23, it must be flexible, and the repetitive spring 2
Since it receives a tensile force of 5, it is preferable to have a certain strength. In the present embodiment, the cloth 24 using the glass reinforcing fiber using the long fiber is used. The spring 25 is always biased so as to pull the cloth 24 toward the support portion 27. In FIG. 2, a stopper shaft 28 is disposed above the support shaft 16 to restrict the rotation of the tensor arm 22 by the elastic force of the spring 25 when the selvage yarn is cut.

The selvage yarn M wound on the selvage yarn bobbin 11 is guided to the cloud yarn guide 19 via the outer periphery of the base shaft 18, and after the direction is reversed by about 180 degrees by the tensor arm 22, the selvage yarn M is wound from the outer periphery of the bobbin holder 10. It passes through the protruding binding arm 29 and is stretched over the ears of the woven fabric. In the tensor arm 22, the protrusion 21a has a protrusion 19b.
The tension of the selvage yarn M is kept constant by rotating from a position where is pressed to a position where the stopper shaft 28 is not contacted.

Next, the operation of the device configured as described above will be described. Before the machine base is started or immediately after the selvage yarn M is delivered, the elastic force of the spring 25 is the smallest as shown in FIG. 5, so that the tensor arm 22 is arranged at the initial position where it does not come into contact with the stopper shaft 28 and the ratchet 20. Meshes with the ratchet wheel 15. That is, the selvage 11
Is not rotatable and the selvage yarn M is not delivered.

When the selvage yarn M is supplied to the selvages as the weaving progresses, the tension of the selvage yarn M stretched between the selvages of the woven fabric increases. Due to the increased tension of the selvage yarn M, the tensor arm 22 is pulled toward the binding arm 29 against the elastic force of the spring 25. When the tension of the selvage yarn M exceeds the elastic force of the spring 25, the tensor arm 22 resists the elastic force of the spring 25, and the binding force is balanced with the elastic force increased by the rotation of the tensor arm 22. It is rotated in the direction of the arm 29.

At this time, since the cloth 24 pulls the spring 25 while being smoothly wound up along the arcuate surface 23 having the same radius of curvature as the support shaft 16, the spring 25 is steadily moved when the tensor arm 22 is rotated. Since the position of the mechanical locking point does not change, it is not swung in a direction other than the expansion / contraction direction. That is, the spring 25 performs expansion / contraction motion only in the expansion / contraction direction and does not move in other directions, so that the elastic force of the spring 25 is stable. Further, there is no sliding between the hook 26 and the support portion 27.

After the tensor arm 22 is rotated and the projection 21a of the bracket 21 is brought into contact with the projection 19b of the cloud yarn guide 19, when the tensor arm 22 is further rotated, the projection 21a is projected. The cloud yarn guide 19 is also rotated by pressing 19b. When the cloud yarn guide 19 is rotated, the integrally formed base shaft 18 is also rotated. Further, since the ratchet 20 is integrally formed with the base shaft 18, the ratchet 20 is rotated in the direction in which it is disengaged from the ratchet wheel 15 by the rotation of the cloud yarn guide 19, and finally, as shown in FIG. The engagement between 20 and the ratchet wheel 15 is disengaged.

When the engagement of the ratchet 20 is disengaged, the selvage yarn bobbin 11 is rotated in the direction for delivering the selvage yarn M, and the selvage yarn M
Is delivered to the ear. In the present embodiment, the cloth 24 is the arc surface 2
Since the spring 25 is stretched by going around 3, the elastic force of the spring 25 in the extension direction is always stable, and the tension of the selvage yarn M delivered is always stable within a certain range. When the selvage yarn M is delivered and the tension of the selvage yarn M decreases, and the elastic force of the spring 25 becomes larger than the tension of the selvage yarn M, the elastic force causes the tensor arm 22 to rotate again to the initial position.

When the spring 25 returns, the cloth 24 is moved to the circular arc surface 23.
When returned from, the fabric 24 is smoothly disengaged from the arcuate surface 23. When the tensor arm 22 is rotated, the position of the stationary locking point of the spring 25 does not change,
Always shrink only in the shrink direction. That is, since the spring 25 is not swung up in a direction other than the contracting direction and there is no sliding between the hook 26 and the support portion 27, the elastic force of the spring 25 when the tensor arm 22 rotates is always stable. To do.

The expansion / contraction motion of the spring 25 only in the expansion / contraction direction does not change even if the machine base rotates at high speed. Therefore, even during high-speed operation of the machine base, the spring 25 performs a stable expansion / contraction motion, and the squeezing device can perform stable delivery of the selvage yarn. Further, since the spring 25 moves only in the expansion / contraction direction, the hook 26 and the support portion 27 do not slide. Therefore, the hook 26 and the support portion 27 are not worn, and there is no fear that the hook 26 will come off the support portion 27.

The present invention is not limited to the above-mentioned embodiments, and within the scope of the present invention,
For example, you may change as follows. (1) Rubber may be used as the elastic body. (2) As the flexible connecting member, any material may be used as long as it is a material that can withstand the tensile force of the spring 25 that repeatedly acts. For example, a strong cloth, a thin and strong metal, and a reinforcing fiber formed using boron, Kevlar, carbon, or the like can be given.

(3) As the flexible connecting member, a thin material such as a string may be used. Again, cloth 24
Like the above, those having a certain degree of strength are preferable, and examples thereof include thin reinforcing wires and long glass fibers. (4) The cloth 25 may be omitted and the spring 25 may be directly attached to the arc surface 23. In this case, both ends of the spring 25 that are not in a spiral shape are used instead of the cloth 24. That is, at least the end of the spring 25 that may come into contact with the arcuate surface 23 needs to be formed of the end of the spring 25 that is not flexible and has a spiral shape.

(5) As shown in FIG. 8, the arcuate surface 23 may be omitted and the cloth 24 may be disposed directly on the outer periphery of the rotatable support shaft 16. In this case, similarly to the case where the arcuate surface 23 is arranged, the spring 25 does not swing up and does the expansion and contraction motion only in the expansion and contraction direction. However, since the arcuate surface 23 is omitted, the distance from the shaft center of the support shaft 16 is shortened. Therefore, the rotation of the cloud yarn guide 19 is increased or the support shaft 16 is rotated.
Need to be thicker.

The arc 25 and the cloth 24 may be omitted, and the spring 25 may be arranged directly on the rotatable support shaft 16. In this case, as described in (4) above, the spring 25 that may come into contact with at least the outer periphery of the support shaft 16.
The ends of the spring 25 have a flexible non-spiral shape.
Must be formed at the ends of. (6) The bracket 21 and the support shaft 16 are fixed, and the support shaft 1
The configuration of rotating 6 may be adopted.

(7) The tensor arm 22 does not necessarily have to be provided on the bracket 21 and may be provided anywhere on the support shaft 16 which is rotated by the elastic force of the spring 25. (8) A long hole may be formed at one end of the bobbin holder 10 and the support portion 27 may be fixed by tightening the support portion 27 at an arbitrary position with a double nut. In this case, the elastic force of the spring 25 can be arbitrarily changed according to the material of the selvage yarn M.

(9) Without using the stopper 23a, the cloth 24
May be directly attached to the arcuate surface 23 with an adhesive or may be fixed by tightening with a bolt. (10) The cloth 24 and the spring 25 may be attached with an adhesive material or may be fixed by tightening with a bolt. (11) Since the hook 26 does not slide on the support portion 27 even if the spring 25 moves in the expansion / contraction direction, the hook 26 may be fixed to the support portion 27. As an example thereof, as shown in FIG. 7, a method of fastening the hook 26 to the support portion 27 with a bolt 30 and fixing it, and the like can be cited.

(12) Instead of using the hook 26, the spring 25 may be arranged on the support portion 27 by loose fitting.

[0038]

As described in detail above, according to the present invention, there is an excellent effect that the twisting device can deliver the selvage yarn stably without being affected by the inertial force even during high speed operation. .

[Brief description of drawings]

FIG. 1 is a schematic view of a fuzzing device.

FIG. 2 is a schematic side view showing a bobbin holder of the present invention.

3 is a partially cutaway schematic front view taken along the line AA of FIG.

4 is a partially cutaway schematic rear view taken along the line BB in FIG.

5 is a partially cutaway schematic front view taken along the line AA of FIG.

FIG. 6 is a schematic plan view of a main part of the bobbin holder.

FIG. 7 is a schematic plan view of a main part of a bobbin holder according to another example.

FIG. 8 is a schematic plan view of a main part of a bobbin holder according to another example.

FIG. 9 is a schematic front view of a main part of a conventional bobbin holder.

FIG. 10 is a schematic diagram showing swing of a spring stretched between a tensor arm supporter and a support portion.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mooring device, 10 ... Bobbin holder, 11 ... Selvage thread bobbin, 15 ... Ratchet wheel as a ratchet wheel, 16 ... Spindle which at least one part of an outer periphery is an arc-shaped support member, 2
0 ... Ratchet as stop pawl, 22 ... Tensor arm as tension receiving arm, 23 ... Arc surface with at least a part of the outer periphery being a support member having an arc shape, 24 ... Cloth as a flexible connecting member, 25 ... Spring as an elastic body

Claims (4)

[Claims] 1. A selvage thread bobbin is axially fitted in a pair of bobbin holders arranged laterally of a loom, and a spindle parallel to the axis of the bobbin holder is rotatably provided. A twisting device in which a tension receiving arm is provided so as to be integrally rotatable with the selvage thread bobbin, and a stop claw that meshes with the ratchet wheel is provided at one end of the support shaft. Selvage tension adjusting device for a loom, which circulates the outer periphery of the shaft and the support shaft and is fixed by an elastic body. 2. A selvage yarn bobbin is axially fitted in a pair of bobbin holders arranged on the side of the loom, and a spindle parallel to the axis of the bobbin holder is rotatably provided. In a twisting device in which a tension-sensing arm is provided in a protruding manner and a ratchet wheel that is integrally rotatably arranged on the selvage thread bobbin and a stop claw that engages with the ratchet wheel are provided at one end of the support shaft, A selvage yarn tension adjusting device for a loom in which one end of a certain connecting member is arranged around the outer periphery of the support shaft and the other end is connected to an end of an elastic body attached to a part of a bobbin holder. 3. A selvage yarn bobbin is fitted axially in a pair of bobbin holders disposed on the side of the loom, a spindle is disposed parallel to the shaft of the bobbin holder, and integrally rotated with the selvage yarn bobbin. In a knurling device in which a ratchet wheel that is movably disposed and a stop claw that engages with the ratchet wheel are disposed at one end of the support shaft, a support member at least part of the outer periphery of which is arcuate is rotatable on the support shaft. A selvage yarn tension adjusting device for a loom, in which a tension-sensing arm is provided so as to project from the supporting member, and a part of the bobbin holder and the supporting member are circulated and connected by an elastic body. 4. A selvage yarn bobbin is axially fitted in a pair of bobbin holders disposed laterally of the loom, and a spindle parallel to the shaft of the bobbin holder is rotatably disposed. A ratchet wheel that is integrally rotatably disposed on the shaft, and a stop tab that engages with the ratchet wheel at one end of the support shaft.
At least a part of the outer circumference of the support shaft is fixed to the support shaft, a tension-sensing arm is projected from the support shaft, and a part of the bobbin holder and the support member are circulated and connected by an elastic body. Ear thread tension adjusting device.