JP2595725B2 - Tow ear forming device in loom - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to an apparatus for forming a tearing ear in a loom.

[Background Art] In this type of apparatus disclosed in Japanese Utility Model Laid-Open Publication No. Sho 63-30364, a pair of relay gears and a pair of planetary gears are provided on a side surface of a supporting gear having a rotation center on the same axis as a fixed sun gear. Are rotatably supported, and the relay gear meshes with both the sun gear and the planetary gear. The ratio of the number of teeth between the sun gear and the planetary gear is set to 2: 1, and when the relay gear rotates halfway around the sun gear while meshing around the sun gear, the planetary gear rotates once in the opposite direction on the support gear. I do. That is, when the support gear rotates by half, the planetary gear rotates by half the rotation of the sun gear in the opposite direction. As described above, a bobbin holder is mounted on the shaft of the planetary gear that revolves around the sun gear so that the rotation period and the revolution period coincide with each other, and the ear thread of the bobbin ear bobbin supported by the bobbin holder is formed by a thread tension. It is pulled out of the bobbin and flicked by a half turn of the supporting gear.

In this manner, the ear thread that is twisted is provided with tension while being guided by the tension arm that receives the spring action. When the ear thread is cut, the tension arm is moved from the ear thread guide position by the spring action. Move to an abnormal position. The tension arm that has moved to the abnormal position is detected by the ear thread abnormality detector, whereby the ear thread abnormality can be grasped.

The ear thread abnormality detector also serves as a bobbin mounting abnormality detector. That is, the bobbin is rotatably supported by a support pin which is inserted and supported so as to be able to be pulled out of the bobbin holder, and the support pin is restrained from coming off by a spring-made come-off prevention member. Accordingly, when the escape preventing member is displaced from the stopper position, the support pin comes off from the bobbin holder, and an abnormal mounting of the bobbin occurs, and members around the bobbin are damaged.
Therefore, the detachment of the support pin is detected by the ear thread abnormality detector.

[Problems to be Solved by the Invention] When the loom is continuously rotated in the reverse direction, the front thread of the woven fabric moves backward, so that the ear thread is loosened. Move to. Therefore, the ear thread abnormality detector detects this abnormality, and the loom stops. Therefore, when the loom rotates backward, the ear thread abnormality detector is disabled so that the loom does not stop due to loosening of the ear thread during the slow reverse rotation. However, in this case, for example, when the bobbin is erroneously set so that the slip-out preventing body is forcibly set to the escaping position when the bobbin is replaced, the bobbin mounting error occurs when the loom is slowly reversed for the cloth fell position adjustment. However, there is a problem that members around the bobbin are damaged by the rotation of the kinking ear forming device.

SUMMARY OF THE INVENTION An object of the present invention is to provide a buckling ear forming apparatus capable of solving such a problem at the time of slow reversal of a loom.

Means for Solving the Problems To this end, the present invention incorporates a bobbin installation abnormality detector for detecting the position of a slip-off prevention body that prevents the removal of a support pin for supporting a bobbin, and detects an abnormality of the bobbin installation abnormality detector. The position was set to a position deviating from the revolution trajectory of the tension arm at the abnormal position, and the abnormality detection position of the twisting ear abnormality detector was set to a position deviating from the revolution trajectory of the escape preventing body at the abnormal position.

[Operation] When the loom is rotated in the reverse direction, the ear thread abnormality detector, ie, loose ear thread, is not detected by disabling the ear thread abnormality detector. The bobbin installation abnormality detector is still in operation even when the loom is slowly reversing, and if a bobbin installation error has occurred, it is detected by the bobbin installation abnormality detector. The abnormality detection position of the bobbin mounting abnormality detector is set at a position deviating from the revolution trajectory of the tension arm at the abnormal position, and the abnormality detection position of the twisting ear abnormality detector is determined from the revolution trajectory of the escape prevention body at the abnormal position. Since the position is set to a deviated position, the ear thread abnormality detector does not detect a bobbin installation error, and the bobbin installation abnormality detector does not detect an ear thread abnormality. Therefore, both stoppage of the loom due to loosening of the ear thread at the time of slow reversal of the loom and occurrence of damage due to a bobbin mounting error can be avoided.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a support shaft fixedly mounted on a side frame (not shown) of the loom through the cover 13. The sun gear 2 is fixed to the support shaft 1, and the support gear 3 is rotatably supported. ing. The support gear 3 meshes with a drive gear 17, which is operatively connected to a loom drive motor. The support gear 3 makes a half turn with respect to one turn of the loom.

On the front surface of the supporting gear 3, a pair of relay gears 4A and 4B are rotatably supported at rotationally symmetric positions with an angle difference of 180 °, and a pair of planetary gears 5A and 5B have an angle difference of 180 °. The relay gears 4A and 4B are rotatably supported at the set rotationally symmetric positions, and mesh with both the sun gear 2 and the planetary gears 5A and 5B. Therefore, when the support gear 3 rotates, the relay gear 4
A and 4B revolve while meshing with the sun gear 2, and the rotation of the relay gears 4A and 4B due to the meshing revolution is transmitted to the planetary gears 5A and 5B.

The gear ratio between the sun gear 2 and the planet gears 5A and 5B is set to 2: 1. As a result, when the support gear 3 makes one rotation, the planet gears 5A and 5B make two rotations on the support gear 3 in opposite directions. That is,
When the support gear 3 makes one rotation, the planetary gears 5A and 5B become the sun gear 2
Rotates once in the opposite direction.

Bobbin holders 6A, 6B are attached to the planetary gears 5A, 5B, respectively, and bobbin ears 7A, 7B are rotatably supported on support pins 6b which are provided so as to be able to be pulled out of holding frames 6a. A slide glass 12 is fixed to one side of the holding frame 6a into which the support pins 6b are inserted, and a slide-out stopper 14 is detachably slidably mounted on the slide guide 12. The escape preventing body 14 is slidable between a position indicated by a chain line and a position indicated by a solid line in FIG. 3, and cannot be removed from the slide guide 12. Exit prevention body 14
Is held at a solid line position by a spring action, and the head of the support pin 6b is pressed at this position, thereby preventing the support pin 6b from coming off.

A shaft 8 is rotatably supported by the holding frame 6a.
A guide 8a is fixedly attached to the shaft, and a tension plate 8b is rotatably supported. A tension arm 8c is integrally protruded from the tension plate 8b, and a tension spring 9 is stretched between the tension plate 8b and the holding frame 6a. The ear yarns Ya and Yb pulled out from the bobbins 7A and 7B are brought into sliding contact with the shaft 8, the guide 8a and the tension arm 8c, and are led out of the guide hole 10, and are pulled out of the tension arm 8c.
, The spring force of the tension spring 9 applies tension to the ear yarns Ya and Yb.

A ratchet 11 is fixed to the shaft 8 and a tension spring 9
Ratchet wheel 7 fixed to bobbins 7A and 7B by
Can be engaged with a. When the tension of the ear yarns Ya and Yb increases, the shaft 8 rotates against the tension spring 9, and the ratchet 11 comes off the ratchet wheel 7a, so that the bobbins 7A and 7B can rotate. As a result, the ear yarns Ya and Yb are pulled out of the bobbins 7A and 7B, and the rotation of the support gear 3 causes the ear yarns Ya and Yb to be repelled.

An ear thread abnormality detector 15 is installed on the upper inner surface of the cover 13, and a bobbin mounting abnormality detector is installed on the lower inner surface of the cover 13.
16 are installed. If no thread tension is applied to the tension arm 8c, the tension arm 8c
3, the tip of the detection arm 15a of the ear thread abnormality detector 15 is set on the revolution trajectory of the tension arm 8c at the abnormal position. Also, the detection arm of the bobbin installation abnormality detector 16
Reference numeral 16a is set on the orbit of the escape preventing body 14 at the abnormal position indicated by the chain line. The revolving trajectories of the tension arm 8c and the slip-off prevention member 14 at the abnormal position are shifted in the axial direction of the support shaft 1, and the ear thread abnormality detector 15 does not detect the slip-off prevention member 14 at the abnormal position. The mounting abnormality detector 16 does not detect the tension arm 8c at the abnormal position.

The kinking ear forming apparatus having such a configuration is similarly installed on the other side frame side of the loom.

The curve Ca in FIG. 4 represents the vertical movement curve of one of the torsion ear bobbins 7A, and the curve Cb represents the vertical movement curve of the other torsion ear bobbin 7B. That is, both curves Ca and Cb represent the opening curves of the ear yarns Ya and Yb. The figure below the curves Ca and Cb represents a schematic diagram of the torsion ear forming apparatus, and shows the positional relationship between the bobbin holders 6A and 6B.

If selvage Ya is consumed by the machine base rotation angle represented by the position A _1, the tension arm 8c moved to abnormal position by the consumption selvage abnormal machine stand rotation angle theta ₁ which is represented by the position A ₂ It contacts the detection arm 15a of the detector 15. The loom control computer (not shown) in the normal operation is checked by the machine base rotation angle theta ₃ represented an abnormal signal input whether to be a machine base stop command signal at position A _3, the detection arm 15a and the tension arm 8c abnormality detection signal entry has from selvage anomaly detector 15 due to contact is grasped by the machine base rotation angle theta _3. Thereby machine base rotation angle loom is represented by the position A ₄ theta
Stop at ₂ .

After the loom is stopped, the loom is stopped by throwing forward in the machine stand rotation angle 0 DEG, represented by positions A ₅ by the ON operation of the button for slow forward command. At this stop position, the work of extracting the support pin 6b on the bobbin holder 6A side is easy. Slide-out member 14 is slid to the position shown by the dashed line in FIG.
6b, the replacement of the bobbin 7A, the insertion of the support pin 6b, and the sliding arrangement of the slip-off preventing member 14 to the position indicated by the solid line in FIG. 3 complete the replacement and mounting of the bobbin 7A.

After the replacement of bobbin 7A is completed, turn on the operation start button.
Operated by the loom throws reversed to the machine base rotation angle theta ₂ which is represented by the position A ₇ from the machine base rotation angle of 0 ° for cloth fell position adjustment. If escape inhibiting member 14 is not slid positioned to prevent the escape of the support pin 6b, the middle portion of the machine base rotation angle 0 DEG motor stage rotation angle theta ₂ is evident from Ryakutai view of Figure 4 As described above, the slip-off preventing body 14 on the bobbin holder 6A side faces downward, and the slip-out preventing body 14 comes to the abnormal position. Therefore, exit blocking body 14 contacts with the machine base rotation angle theta ₀ represented by position A ₆ in the middle of the slow reverse rotation of the loom in the detection arm 16a of the bobbin mounting abnormality detector 16. As a result, an abnormality detection signal is output from the bobbin installation abnormality detector 16, and the loom control computer stops the loom based on the abnormality detection signal input. Accordingly, the loom is stopped before the support pin 6b is pulled out due to forgetting to set the slip-out preventing body 14, and damage to members around the bobbin 7A due to bobbin mounting error is avoided.

Further, since the ear thread abnormality detector 15 is deactivated at the time of the reverse rotation, the loosening of the ear thread due to the slow reverse rotation is not detected as the abnormality of the ear thread, and unnecessary stoppage of the loom is avoided.

Performs the analogous bobbin mounting mistakes detected with respect to the other bobbin 7B side, the position B ₁ shown in FIG. 4 is a selvage yarn abnormality occurrence time, position B ₂ are a detection arm 15a of the selvage anomaly detector 15 Tension upon contact with the arm 8c, when the position B ₃ is selvage abnormality presence check, when the position B ₄ looms stop, when the position B ₅ bobbin exchange position B ₆ when the bobbin mounting miss occurs presence check,
Position B ₇ represents a time loom restarting operation.

[Effects of the Invention] As described in detail above, the present invention incorporates a bobbin mounting abnormality detector that detects the position of a slip-off preventing body that prevents the support pin for bobbin support from slipping out, and detects an abnormality of the bobbin mounting abnormality detector. Since the position was set to a position deviating from the revolving locus of the tension arm at the abnormal position, and the abnormal detection position of the grenching ear abnormality detector was set to a position deviating from the revolving locus of the escape preventing body at the abnormal position, Even if the ear thread abnormality detector is inoperative at the time of reverse rotation, the bobbin can be grasped and the loom can be stopped before the bobbin deviates from the normal position, and the loosening of the ear thread due to the slow reversal can be prevented. This provides an excellent effect that damage to the members around the bobbin can be avoided without detecting the occurrence of a failure.

[Brief description of the drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a front view showing a state in which a pair of bobbins are arranged horizontally, FIG. 2 is a front view showing a state in which a pair of bobbins are arranged vertically, FIG. FIG. 3 is a sectional view taken along line AA of FIG. 2, and FIG. 4 is a timing chart. Bobbin holders 6A, 6B, support pins 6b, bobbin ears 7A,
7B, tension arm 8c, tension spring 9, escape prevention body
14, ear thread abnormality detector 15, bobbin installation abnormality detector 16, ear thread
Ya, Yb.

Claims (1)

(57) [Claims] A bobbin holder for detecting a position of a tension arm for detecting a position of a tension arm for applying a tension while guiding the thread ear drawn from a bobbin rotatably supported by a support pin on the bobbin holder; A bobbin mounting for detecting the position of a slip-off prevention body for preventing the support pin from slipping out in a buckle ear forming apparatus having a pull-out mechanism for inserting and supporting the support pin so that the support pin can be pulled out and for preventing the support pin from slipping out. Incorporates an abnormality detector and sets the abnormality detection position of the bobbin mounting abnormality detector to a position off the revolution trajectory of the tension arm in the abnormal position, and prevents the abnormal detection position of the burring ear abnormality detector from being in the abnormal position A twisting ear forming device in a loom set at a position off the orbit of the body.