JP2588171Y2 - Ear thread bobbin holder device for loom - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ear thread bobbin holder device for a planetary gear type ear assembly device of a loom.

[0002]

2. Description of the Related Art Conventionally, there is an ear thread bobbin holder device for a loom as shown in FIGS. 11 and 12 (see Japanese Patent Publication No. 60-24211). This will be described. A U-shaped bobbin holder 101 is fixed to a planetary gear shaft S that rotates while revolving.

A bobbin shaft 102 is detachably mounted on the bobbin holder 101 between a pair of side plates. On this bobbin shaft 102, a bobbin 103 of ear thread is rotatably supported. On one side of the bobbin 103, a ratchet wheel 104 is formed integrally therewith. In FIG. 12, the bobbin 103 and the ratchet wheel 104 are not shown. In addition, the bobbin holder 101 is mounted on the bobbin
105 is fixed. A cylinder 106 is rotatably mounted on the mounting shaft 105, and a stop claw 107 facing the ratchet wheel 104 and a passive arm 108 are integrally formed on the cylinder 106. The passive arm 108 is provided at its tip with an ear thread guide 109 for guiding the ear thread Y drawn from the bobbin 103. Here, the passive arm 108 is urged in the counterclockwise direction in FIG. 11 by the tension of the ear thread Y passed through the ear thread guide 109, whereby the pawl 107 which rotates integrally with the passive arm 108 is driven by a ratchet wheel. The rotation of the bobbin 103 in the ear thread feeding direction is restricted by engaging with the bobbin 103.

The mounting shaft 105 also has a tension sensing arm 110
Are rotatably mounted. The tension sensing arm 110 includes a base 110a and a tip guide 110c attached to the base 110a via a bolt / nut 110b, and is provided between a pin 111 fixed to the base 110a and a pin 112 fixed to the bobbin holder 101. The coil spring 113 is urged in a counterclockwise direction in FIG.

The end guide 110c of the tension sensing arm 110 is provided with ear thread guides 114 and 115. The ear thread Y guided from the ear thread guide 109 of the passive arm 108 is guided by the ear thread guide 114 to be inverted. After being guided by the ear thread guide 115, the guide hole of the yarn guide 116 fixed to the bobbin holder 101
It is derived through 116a. Here, the tension sensing arm 110 receives the tension of the ear thread Y guided by the ear thread guides 114 and 115, and, due to the increase in the tension, rotates clockwise in FIG. 11 against the urging force of the spring 113. ,
At this time, the bolt / nut portion 110b entrains the passive arm 108, and the pawl 107 that rotates integrally with the passive arm 108
4

Accordingly, when the ear yarn Y is pulled from the yarn guide 116 side as the weaving progresses and the tension of the ear yarn Y increases,
The tension sensing arm 110 receiving the tension of the ear thread Y is a spring.
When the tension turns clockwise in FIG. 11 against the urging force of 113, and the tension exceeds a predetermined value, the bolt / nut portion 110b of the tension sensing arm 110 comes into contact with the passive arm 108 and follows it. Then, the pawl 107, which rotates integrally with the passive arm 108, is released from the ratchet wheel 104 by the rotation of the passive arm 108, and the restriction on the bobbin 103 is released. As a result, the bobbin 103 rotates to draw out the ear thread Y, thereby reducing the tension of the ear thread Y. When the tension of the ear thread Y decreases in this manner, the tension sensing arm 110 is returned by the urging force of the spring 113, and the passive arm 108 returns, the pawl 107 engages with the ratchet wheel 104, and the bobbin 103 returns.
Regulate the rotation of By repeating such an operation, the tension of the ear thread Y is maintained in a certain range.

Here, the end of a spring 113 for urging the tension sensing arm 110 is hooked on a pin 112.
Numeral 2 is formed on the head of a screw 117. The screw 117 is inserted into an elongated hole 118 formed in the bobbin holder 101, and a nut 119 is tightened and fixed from the opposite side.
Therefore, the mounting position of the spring 113 can be adjusted, and by this position adjustment, the urging force of the spring 113 can be adjusted so that the tension value when the ear thread Y is fed out can be set to an appropriate value according to the thread type. ing.

[0008]

However, in such a conventional ear thread bobbin holder device, when the mounting position of the spring 113 for urging the tension sensing arm 110 is adjusted, it projects outside the bobbin holder 101. A nut 119 is fastened and fixed to the screw 117, but it is necessary to hold the head of the screw 117 inside the bobbin holder 101 by hand to prevent the screw 117 from rotating, and the bobbin holder 101 is relatively compact. However, since it is installed facing the inside of the loom frame, there is a problem that work is difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide an ear thread bobbin holder device for a loom which can easily adjust the mounting position of a spring for urging a tension sensing arm. I do.

[0010]

SUMMARY OF THE INVENTION For this reason, the present invention provides a bobbin holder integrally mounted on a planetary gear shaft that rotates while revolving, and a rotatable support via a bobbin shaft detachably mounted on the bobbin holder. A bobbin of ear thread, a ratchet that rotates integrally with the bobbin, a pawl that engages with the ratchet and regulates the rotation of the bobbin, and is rotatably mounted on the bobbin holder via a mounting shaft. Then, it is urged in one direction by a spring stretched between the bobbin holder, and rotates in the other direction under the tension of the ear thread pulled out of the bobbin, and at this time, the tension that releases the pawl from the ratchet wheel. In the ear thread bobbin holder device of a loom comprising a sensing arm, the end of the spring is fixed so as to be position-adjustable with a screw and a nut inserted into an elongated hole formed in the bobbin holder. A, is obtained by a configuration in which the detent means on one of said screw and nut.

[0011]

In the above construction, when the end of the spring is fixed so as to be position-adjustable by the screw and the nut inserted into the elongated hole formed in the bobbin holder, the one end of the screw or the nut is prevented from rotating. Is provided, there is no need to support one of the screw and the nut, and loosening for position adjustment and tightening for position fixing can be performed only by the other operation.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. FIG. 1 is an exploded view of the ear thread bobbin holder device according to the present invention, FIG. 2 is a side view of the assembled state of the ear thread bobbin holder device (excluding the bobbin), FIG. 2, FIG. 5 is a view from arrow C in FIG. 2, and FIG. 6 is a schematic view of an ear thread tension adjusting mechanism. 7 is an enlarged plan view of a spring retainer part, FIG. 8 is an enlarged plan view of a spring retainer fixing nut, FIG. 9 is a sectional view taken along line DD of FIG. 7, and FIG. 10 is a sectional view taken along line EE of FIG. is there.

The bobbin holder 1, which is the main body of the ear thread bobbin holder device, has the concave portion 2 formed on the bottom plate 1a thereof aligned with the end (flange portion) of the planetary gear shaft S, and fixed with screws 3. This bobbin holder 1 has a thickness of 0.8
The bottom plate 1a, a pair of side plates 1b, 1b connected to the bottom plate 1a, and a back plate 1c connected to the bottom plate 1a and the side plates 1b, 1b are formed integrally with each other in a box shape by drawing using a plate material of about mm. It is formed integrally. The opposite side of the back plate 1c is also integrally formed by drawing. However, since it is on the side where the ear thread bobbin 9 is put in and taken out, the opening 4 is largely cut out by post-processing, and the rib 1d is left in a U-shape. It is.

Mounting holes 5, 5 are formed in the pair of side plates 1b, 1b of the bobbin holder 1, and bushes 6A, 6B are mounted in these mounting holes 5, 5, respectively. A bobbin shaft 7 is inserted into the bush 6A, 6B from the end of the bush 6A from the bush 6A side.
When the tip of the head reaches the bush 6B, the base head 8
Is locked to the bush 6A.

The bobbin shaft 7 rotatably supports the ear thread bobbin 9 previously inserted through the opening 4 into the bobbin holder 1. On one side of the ear thread bobbin 9, a ratchet wheel 10 is formed integrally therewith. Bobbin shaft 7
The head 8 is pressed by a stopper 12 rotatable around a pin 11 fixed to one side plate 1b of the bobbin holder 1 so as to be prevented from falling off.

Next, detailed structures of the bushes 6A and 6B, the bobbin shaft 7 and the stopper 12 will be described. The bushes 6A and 6B are both made of resin, and have a boss 13 protruding from the center of a mounting surface (outer surface) of the bobbin holder 1 on the inner surface of the side plate 1b to fit into the mounting hole 5 of the side plate 1b. A plurality of screws 14 are inserted around the boss 13 so as to protrude from the mounting surface. Therefore, bush 6
A, 6B are put inside the side plate 1b of the bobbin holder 1,
The boss 13 is fitted into the mounting hole 5 of the side plate 1b,
14 is inserted into the insertion hole 15 of the side plate 1b, and the nut 16 is screwed into the end of the screw 14 from the outside, so that the bushes 6A, 6
B is detachably fixed to the bobbin holder 1.

A bearing hole into which the bobbin shaft 7 is inserted is formed in the center of the boss portion 13, and a bearing 17 made of a wear-resistant member (for example, stainless steel, ceramic or the like) is inserted therein. . In addition, the bush 6A, 6
A guide piece 18 for guiding the ear thread bobbin 9 when the ear thread bobbin 9 is mounted is formed on the inner surface of B so as to protrude in a substantially U-shape.

A projection 19 surrounding the bearing 17 is formed at the center of the boss 13 on the outer surface of the bush 6A, and a hexagonal hole is located at the center of the projection 19 on the inlet side of the bearing 17.
20 are formed (see FIGS. 3 and 2). Further, a flat portion 21 is formed on a part of the outer periphery of the protruding portion 19 (see FIG. 2). The bobbin shaft 7 is made of resin, and its head 8 is formed in a hexagonal shape. This hexagonal head 8 has a bush 6
A fits into the hexagonal hole 20 of A, thereby preventing the bobbin shaft 7 from rotating. A hemispherical concave portion 22 is formed at the center of the end face of the head 8.

The stopper 12 is made of a metal leaf spring.
The base has a hole 23 into which the pin 11 is inserted. A rising portion 24 is formed on one side of the leading end side, which is bent outward to form a handle portion and to ride on the head portion 8 of the bobbin shaft 7, and is formed on the other side of the outer periphery of the projecting portion 19 of the bush 6A. A falling portion 25 bent inward to be locked to the flat portion 21 is formed. Further, a hemispherical convex portion 26 corresponding to the concave portion 22 is formed on a plate surface for holding the end surface of the head 8 of the bobbin shaft 7.

Next, an ear thread tension adjusting mechanism provided in the ear thread bobbin holder device will be described. A mounting shaft 27 is fixed between the side plates 1b, 1b of the bobbin holder 1 so as to be parallel to the bobbin shaft 7. A cylinder 28 formed by rolling a plate material is rotatably mounted on the mounting shaft 27 via bushes 29 press-fitted at both ends thereof.
, A pawl 30 facing the ratchet wheel 10 of the ear thread bobbin 9 and a passive arm 31 are integrally formed.

An end thread guide 32 made of ceramic for guiding the ear thread Y drawn out from the ear thread bobbin 10 is fixedly attached to the distal end side of the passive arm 31. Here, the passive arm 31 is urged in the clockwise direction in FIG. 6 by the tension of the ear thread Y passed through the ear thread guide 32, whereby the pawl 30 that rotates integrally with the passive arm 31 is moved to the ratchet wheel 10. And restricts the rotation of the ear thread bobbin 9 in the ear thread payout direction.

A tension sensing arm 33 is rotatably mounted on the mounting shaft 27. The tension sensing arm 33 is fixed to the mounting shaft 27 via a bush 34, 34 so as to be rotatably fitted to the mounting shaft 27, a projection 36 projecting from the boss 35, and the projection 36. A pin 37 and a rod 38 attached via the pin 37. A ceramic ear thread guide 39 is integrally formed at the tip of the rod 38.

The tension spring 33 is urged clockwise in FIG. 6 by applying a coil spring 40 to the pin 37 of the tension arm 33. Then, when the tension sensing arm 33 rotates counterclockwise in FIG. 6 against the urging force of the coil spring 40, at this time, a part of the protruding piece 36 contacts the passive arm 31 and entrains it, The pawl 30 that rotates integrally with the passive arm 31
The ear thread bobbin 9 is rotatable in the ear thread payout direction by detaching from the ear thread bobbin 9.

To explain the mounting structure of the coil spring 40, a hook 41 is mounted on one end of the coil spring 40, and the hook 41 is hooked on the pin 37 of the tension sensing arm 33. The other end of the coil spring 40 is the bobbin holder 1
Is attached to a locking portion 43 of a spring retainer 42 which is fixed to the outside of the back plate 1c so as to be adjustable in position. Here, the attachment portion of the hook 41 and the locking portion 43 to the coil spring 40 is T
The coil spring 40
Can be engaged with the spiral portion without bending, and the durability can be improved.

The fixing structure of the spring retainer 42 in which the position can be adjusted will be described with reference to FIGS. 7 to 10. Two rows of slits (long holes) 44 and 45 are formed in the back plate 1 c of the bobbin holder 1. ing. In addition, continuous unevenness is formed at the edge of the slit 45, and this can be used as a scale. The spring retainer 42 has a ridge 46 fitted to one slit 44 and a slit 45
And a rectangular projection 47 that fits into the slits 44, whereby the position can be adjusted along the slits 44, 45. Then, a screw 49 is inserted into the insertion hole 48 of the spring retainer 42, an end of the screw 49 is passed through the slit 45, and screwed into a screw hole 51 of a nut 50 applied to the inside of the back plate 1c. The spring retainer 42 is fixed. The nut 50 is formed by embossing a screw hole 51 in a rectangular plate material, a notch 52 is formed on one side thereof, and by engaging the projection 47 of the spring retainer 42 with this notch 52, The rotation of the nut 50 is prevented.

Here, the notch 52 and the projection 47 of the spring retainer 42 which engages with the notch 52 constitute a means for preventing the nut 50 from rotating. A yarn guide 53 for guiding the ear thread to the cloth fell side is fixedly attached to the ear thread bobbin holder device. That is, a substantially L-shaped yarn guide 53 is provided, and one end of the yarn guide 53 is fixed to the side plate 1 b of the bobbin holder 1 by the screw 54 and the nut 55. A ceramic ear thread guide is attached to the other end of the yarn guide 53.
56 is fixedly mounted.

Here, the ear thread Y pulled out from the ear thread bobbin 9 passes through the peripheral surface of the cylinder 28 as shown in FIG.
After being passed through the ear thread guide 32 of the passive arm 31, the tension sensing arm 33
The yarn guide 53 is guided by the
Through the ear thread guide 56 to the cloth fell side. Accordingly, the tension sensing arm 33 receives the tension of the ear thread Y guided by the ear thread guide 39, and, due to the increase in the tension, rotates counterclockwise in FIG. 6 against the urging force of the coil spring 40. At this time, a part of the protruding piece 36 comes into contact with the passive arm 31 to carry it, and the pawl 30 that rotates integrally with the passive arm 31 is disengaged from the ratchet wheel 10 so that the ear thread bobbin 9 Can be rotated in the ear thread payout direction.

Next, the operation will be described. The method of attaching the ear thread bobbin 9 to the bobbin holder 1 will be described. The ear thread bobbin 9 is inserted through the opening 4 between the pair of side plates 1b, 1b of the bobbin holder 1. At this time, both ends of the ear thread bobbin 9 are guided by the guide pieces 18 on the inner surface of the bushes 6A, 6B, and the shaft holes of the ear thread bobbin 9 are inserted into the bushes 6A, 6B.
It is easy to match with the bearings 17 and 17 of FIG.

Next, the bobbin shaft 7 is inserted into the bearing 17 of one bush 6A, and this bobbin shaft 7 is made to pass through the shaft hole of the ear thread bobbin 9, and the bearing 17 of the other bush 6B is inserted.
Insert up to. At this time, the hexagonal head 8 of the bobbin shaft 7 is engaged with the hexagonal hole 20 of the bush 6A to prevent rotation. Such rotation of the bobbin shaft 7 prevents wear of the bobbin shaft 7 due to sliding contact with the bushes 6A and 6B, and improves durability.

Next, the rising portion (handle portion) 24 of the stopper 12
Rotate the stopper 12 around the pin 11 by hand.
Then, the stopper 12 rides on the end face of the head 8 of the bobbin shaft 7 by the rising portion 24. And the falling part
The projection 54 of the bush 6A is locked to the flat surface 21 on the outer periphery of the projection 19, and further rotation is restricted. At this time, the projection 26 of the stopper 12 fits into the recess 22 of the end face of the head 8. In addition, the stopper 12 is prevented from coming off. In this state, the stopper
The stopper 12 presses the end face of the head 8 of the bobbin shaft 7 by the restoring force accompanying the elastic deformation of the 12 to prevent the bobbin shaft 7 from coming off, and the fitting between the convex portion 26 and the concave portion 22 (click action). This prevents the stopper 12 from coming off.

Since the ear thread bobbin 9 is mounted as described above, the ear thread Y from the ear thread bobbin 9 may be passed as shown in FIG. The operation of the ear thread tension adjusting mechanism will be described. When the ear thread Y is pulled from the yarn guide 53 side as the weaving progresses and the tension of the ear thread Y increases, the tension sensing arm 33 receiving the tension of the ear thread Y becomes 6 rotates counterclockwise in FIG. 6 against the coil spring 40, and when the tension exceeds a predetermined value, a part of the protruding piece 36 of the tension sensing arm 33 comes into contact with the passive arm 31 and follows it. Then, the pawl 30 that rotates integrally with the passive arm 31 is released from the ratchet wheel 10 by the rotation of the passive arm 31, and the restriction on the ear thread bobbin 9 is released. As a result, the ear thread bobbin 9 rotates to feed out the ear thread Y, and the tension of the ear thread Y is reduced. When the tension of the ear thread Y decreases in this way, the tension sensing arm 33 is returned by the urging force of the coil spring 40, so that the passive arm 31 returns and the pawl 30 engages with the ratchet wheel 10,
The rotation of the ear thread bobbin 9 is regulated again. By repeating such an operation, the tension of the ear thread Y is maintained in a certain range.

Here, when adjusting the tension of the ear thread Y, the screw 49 fixing the spring retainer 42 is loosened by a screwdriver. At this time, the nut 50 has its notch
Since the projection 52 of the spring retainer 42 is engaged with the projection 52 to prevent rotation, it is not necessary to press the nut 52 by hand. After loosening the screw 49, the spring retainer 42
Is moved along the slits 44 and 45 by the ridges 46 and the projections 47 to adjust the position, and the urging force of the coil spring 40 is adjusted so that the yarn thread does not break and the overrun does not occur. Be appropriate according to

When the position is determined, the screw 49 is tightened by a screwdriver. Also at this time, the nut 50 has its notch 52
As a result, the nut 52 is engaged with the projection 47 of the spring retainer 42 to prevent rotation, so that it is not necessary to press the nut 52 by hand. In this manner, the mounting position of the spring retainer 42 can be easily changed, and thereby the coil spring 40
Can be adjusted, so that the tension of the ear thread Y can be easily adjusted.

In this embodiment, a spring retainer 42 is attached to the outside of the bobbin holder 1, and the coil spring 40 is disposed substantially parallel to the planet gear shaft S.
As a result, the coil spring 40 does not interfere with the ear thread bobbin 9 in the bobbin holder 1, and accordingly, the ear thread bobbin 9 can be increased in the winding width direction, and the winding width of the ear thread bobbin 9 and thus the winding amount can be increased. The replacement frequency can be reduced.

In the present embodiment, the end of the coil spring 40 is screwed into the slit of the bobbin holder 1 with the screw 49 and the nut 50.
To fix the position of the bobbin holder 45 so as to be adjustable, a nut 50 is provided on the nut 50 inside the back plate 1c of the bobbin holder 1. That is, the projection 47 of the spring retainer 42 is engaged with the notch 52 of the nut 50 to prevent rotation, and the head of the screw 49 located outside the back plate 1c is fastened and fixed. However, the present invention is not limited to this. For example, a rotation preventing means may be provided on the screw 49 to fasten and fix the nut 50. In this case, the nut 50 is arranged outside the back plate 1c, The head of the screw 49 is located inside the back plate 1c, and a notch is provided in the head of the screw 49 so that the spring retainer
What is necessary is just to make it engage with 42 projections.

[0036]

As described above, according to the present invention, when adjusting the biasing force by adjusting the mounting position of the spring for biasing the tension sensing arm, the screw for fixing the end of the spring is used. Since one of the nuts and the nut is provided with a detent means, it is not necessary to support one of the nuts, and the other can be adjusted only by tightening and loosening the other, so that the effect of simplifying the operation can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded view of an ear thread bobbin holder device showing an embodiment of the present invention.

FIG. 2 is a side view of the ear thread bobbin holder device of the embodiment.

FIG. 3 is a view taken in the direction of arrow A in FIG. 2;

FIG. 4 is a view taken in the direction of arrow B in FIG. 2;

FIG. 5 is a view taken in the direction of arrow C in FIG. 2;

FIG. 6 is a schematic diagram of an ear thread tension adjusting mechanism.

FIG. 7 is an enlarged plan view of a spring retainer part.

FIG. 8 is an enlarged plan view of a nut.

FIG. 9 is a sectional view taken along the line DD in FIG. 7;

10 is a sectional view taken along line EE in FIG. 7.

FIG. 11 is a side view of an ear thread bobbin holder device showing a conventional example.

FIG. 12 is a front view of the above.

[Explanation of symbols]

 1 bobbin holder 6A, 6B bushing 7 bobbin shaft 9 ear thread bobbin 10 ratchet wheel 12 stopper 27 mounting shaft 30 pawl 31 passive arm 33 tension sensing arm 40 coil spring 42 spring retainer 43 locking part 44, 45 slit (long hole) 46 Ridge 47 protrusion 49 screw 50 nut 52 notch 53 yarn guide

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-321083 (JP, A) JP-B-60-24211 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) D03C 7/08 D03D 47/40

Claims (1)

(57) [Scope of request for utility model registration] 1. A bobbin holder integrally mounted on a planetary gear shaft that rotates while revolving, a bobbin of an ear thread rotatably supported via a bobbin shaft removably mounted on the bobbin holder, and the bobbin. A ratchet wheel that rotates integrally, a stop pawl that engages with the ratchet wheel and regulates the rotation of the bobbin, and a spring that is rotatably mounted on the bobbin holder via a mounting shaft and stretches between the bobbin holder. And a tension sensing arm that rotates in the other direction under the tension of the ear thread pulled out of the bobbin, and at this time releases the pawl from the ratchet wheel. an apparatus, as well as adjustable in position fixed by the screw and nut are inserted the ends of the spring to the long hole formed in the bobbin holder, one of said screw and nut one An ear thread bobbin holder device for a loom, wherein a detent means is provided on one side.