JPH076284U - Knitting machine gripper drive wheel - Google Patents

Abstract

(57) [Abstract] [Purpose] In the process of driving the gripper belt,
(EN) A gripper drive wheel for a knitting machine having a longer contact life with a more reliable contact with the gripper belt, dispersing the force received by the convex teeth, eliminating the phenomenon of stress concentration on the convex teeth, and extending the service life. To aim. A gripper drive wheel peripheral surface provided with a plurality of convex teeth (32) at appropriate equal intervals corresponding to a plurality of engaging holes (121) provided on the bottom surface of the gripper belt (12) at appropriate equal intervals. Formed in (31) are concave grooves (33) that are connected to each other along the roots of both sides of each convex tooth (32) to improve the tooth contact when the gripper belt and the wheel peripheral surface are engaged. Is configured to.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a knitting machine, and more particularly to a gripper drive wheel in the knitting machine.

[0002]

[Prior art]

 As shown in FIG. 3, the knitting machine 10 mainly knits a cloth or the like by intersecting warp threads and weft threads. The gripper drive wheels 11 provided at both ends of the shed (opening) in the machine body are repeatedly rotated, and the gripper belt 12 having the gripper 13 attached to the tip is interlocked along the shed. As shown in FIG. 5, the gripper drive wheel 11 has a plurality of convex teeth 111 provided on the wheel peripheral surface 112 at appropriate equal intervals, and the gripper belt 12 has a rear surface (as shown in FIG. 4) on the back surface thereof. A plurality of engaging holes 121, which mesh with each other in correspondence with the convex teeth 111 of the drive wheel 11, are arranged at equal intervals in a splot shape. During knitting, when the gripper drive wheel 11 is repeatedly rotated as shown in FIGS. 5 (a), 5 (b) and 5 (c), first, as shown in FIG. 5 (a), one gripper 13 is moved from one end of the opening. The weft thread 17 is fed to the center position of the opening between the two drive wheels 11 (the space between the two gripper drive wheels 11 is the space for stretching the warp thread), and further, as shown in FIG. As shown in Fig. 5 (c), the weft thread 17 is hooked, and the weft thread 17 is handed to the other end of the opening, and the warp thread and the weft thread are knitted while repeating the reciprocating operation in this way to make a cloth. .

FIG. 6 is a schematic view showing a partially enlarged structure of the gripper drive wheel 11 and a driving state of the gripper belt 12 at present. The knitting machine reciprocates the gripper belt 12 along the shed of the warp opening to hook the weft thread and knit a cloth or the like at a high speed. Therefore, when the gripper belt 12 is fed out, the roots of the convex teeth 111 exert a considerably strong stress. receive. In particular, the convex tooth 111 at the uppermost position of the gripper drive wheel 11 receives a greater force at both ends of the convex tooth in the figure when the gripper belt 12 is driven, and the convex tooth 111 of the gripper drive wheel 11 is used for a long period of time. May be broken. Therefore, in the structure of the conventional gripper drive wheel 11, for the convenience of manufacturing, in order to prevent stress from concentrating on both roots of the convex teeth 111 during use, loose circles 115 are formed on both lower ends of the convex teeth 111. Take on. However, when this is done, the gripper belt 12 that has been bitten between the convex teeth 111 and the convex teeth 111 floats in the air and the teeth do not hit well, and the gripper belt 12 comes into contact with the wheel peripheral surface 116 and is not supported. Since only the convex teeth 111 on both sides are directly supported, the gripper belt 12 during driving rises, the contact with the wheel peripheral surface 116 is unstable, and there is a risk of slipping off. Therefore, it is inconvenient to use because it is necessary to provide a guide cover along the tooth tips to prevent the gripper belt 12 from coming off during use.

FIG. 7 is a schematic view showing another conventional gripper belt and a gripper driving wheel in an engaged state. By forming both sides of the convex tooth 111 in a right angle 117 shape, the gripper belt 12 is brought into full contact with the wheel peripheral surface 116 to improve the tooth contact, and the phenomenon that the gripper belt 12 rises and comes off It can be improved. However, as described above, stress concentration points are generated at the lower end corners of both sides of the convex tooth 111, the roots of both sides of the convex tooth 111 are more easily fatigued and more likely to be broken, and the lower ends of both sides of the convex tooth 111 are bent at right angles. It is extremely difficult to finish it in manufacturing.

Further, as shown in FIG. 8, if the conventional gripper drive wheel as shown in FIG. 6 drives the gripper belt, the gripper belt is prevented from floating and detaching from the wheel peripheral surface 116. Therefore, if the convex tooth 111 is made slightly tapered and further protruded to improve the tooth contact with the gripper belt, there is a problem that the gripper belt may slip off and the stress may be concentrated on both sides of the convex tooth. Can be resolved. However, in this case, when the gripper belt 12 is driven, the gripper belt is strongly pushed downward by the amount of deeper engagement with the convex tooth, and the smoothness when the two are separated is lacked. Become. Therefore, this kind of structure is not ideal, and the contact between the gripper belt 12 and the wheel peripheral surface 116 is still not perfect, and the tooth contact is evenly distributed on the wheel peripheral surface 116 so that the load on the convex teeth 111 is increased. It cannot be reduced.

[0006]

[Problems to be solved by the device]

 In view of the problem of the gripper drive wheel in the above-mentioned conventional knitting machine, in the process of driving the gripper belt, the present invention ensures more reliable contact with the gripper belt, disperses the force received by the convex teeth, and causes the convex teeth to move. It is an object to eliminate the phenomenon of stress concentration and provide a gripper drive wheel for a knitting machine that has a long service life.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a plurality of convex teeth on the peripheral surface of the gripper drive wheel at predetermined equal intervals corresponding to a plurality of engaging holes provided at the bottom surface of the gripper belt at predetermined equal intervals, Further, it is characterized in that concave grooves are formed in the wheel circumferential surface so as to be connected along the roots of both sides of each of the convex teeth, whereby the tooth contact at the time of biting between the gripper belt and the wheel circumferential surface is further improved. Improve

In this case, it is preferable that the connecting wall surface of the concave groove and the roots on both sides of the convex tooth be formed into an arc surface. Further, when the distance between the convex teeth is 12.7 mm, it is more preferable to design the radius of the arc surface to be 1.3 mm.

[0009]

[Action]

 As described above, according to the present invention, the plurality of convex teeth are provided on the wheel peripheral surface at appropriate equal intervals in correspondence with the plurality of engaging holes provided at appropriate intervals on the bottom surface of the gripper belt. A concave groove that is connected to both roots of each convex tooth is formed in the wheel peripheral surface, and preferably, a connecting wall surface between the concave groove and both roots of the convex tooth is formed in an arc surface. Therefore, when the gripper belt and the wheel peripheral surface are engaged and reciprocally driven, a better contact effect between each convex tooth and each engagement hole can be obtained, and each gripper belt can be operated according to the operating force of the gripper belt. The stress generated on the roots of both sides of the convex tooth is widely distributed by the arcuate surface, eliminating the phenomenon of stress concentration on the roots of both sides of the conventional convex tooth. Prolongs. In particular, when the distance between the convex teeth is 12.7 mm, the stress applied to the convex teeth can be more ideally distributed by setting the radius of the arc surface to 1.3 mm.

The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description of the embodiments with reference to the drawings.

[0011]

【Example】

 As shown in FIG. 1, the gripper drive wheel in the knitting machine of the present invention has a plurality of convex teeth 32 provided on the wheel peripheral surface 31 at appropriate equal intervals. A concave groove 33 is provided on the wheel peripheral surface 31 so as to be connected to the base of the lower end of the tooth 32, and a connecting wall surface between the concave groove 33 and the convex tooth 32 is formed as an arc surface 331. The half diameter of the arc surface 331 is preferably 1.3 mm, for example, when the distance between the convex teeth 32 is 12.7 mm. With this configuration, the phenomenon of stress concentration on the roots of both sides of each convex tooth 32 during use does not occur, and good resistance can be applied to the lower bottom.

As shown in FIG. 2, the gripper belt 12 is provided with a plurality of engagement holes 121 on the back surface of the gripper belt 12 so as to mesh with the convex teeth 32 of the wheel peripheral surface 31. When occluded on the peripheral surface 31, concave grooves 33 are provided so as to be connected to both roots of each convex tooth 32, and outwardly extending arcuate surfaces 3 31 of both roots of each convex tooth 32 are recessed. Since it is formed in the groove 33, the engaging hole 121 of the gripper belt and the convex tooth 32 mesh with each other with good tooth contact, and the protrusion between the engaging hole 121 and the engaging hole 121 of the gripper belt 12 is the wheel. It surely contacts the peripheral surface 31. Therefore, the phenomenon in which the gripper belt 12 is lifted up and displaced does not occur, and the arcuate surfaces 331 positioned in the concave groove 33 form the roots on both sides of the convex tooth 32. The stress is not concentrated, the stress distribution is widened, and the convex teeth 32 are not easily broken. That is, the design of the wheel peripheral surface 31 according to the present invention ensures that the gripper belt and the gripper drive wheel are properly meshed with each other without causing tooth contact, and the stress is not concentrated in one place, so that the use efficiency is improved and the gripper drive wheel is driven. Since the service life of the wheel is extended and the concave groove 33 having the arcuate surface 331 can be manufactured very easily, there is no technical difficulty in manufacturing.

Finally, the comparison experiment of the gripper drive wheel of the present invention and the conventional gripper drive wheel having convex teeth whose both roots are right-angled by the Finite Element Analysis method is mentioned. To do. In the experiment, a gripper belt with a gripper of 215 grams was used, and the turning power of the gripper drive wheel was set to 600 Newton. As a result of analyzing a conventional gripper drive wheel having convex teeth with double-sided roots at right angles, the force received by the convex tooth at the uppermost end of the gripper drive wheel is the highest, and the corners of the roots of both sides of the convex tooth are the highest. It was seen that a reaction concentration phenomenon occurred. As the gripper drive wheel of the present invention, the one in which the distance between the convex teeth 32 and the convex teeth 32 is 12.7 mm and the radius of the arc surface 331 in the concave groove 33 is 1.3 mm is used. As a result, it was confirmed that the stresses on both sides of the convex tooth of the present invention were relatively dispersed. That is, according to the design of the present invention, it was confirmed by experiments that the force exerted by the convex teeth during the driving of the gripper belt is minimal and the service life of the gripper driving wheel can be extended.

[0014]

[Effect of device]

 The structural features of the present invention can completely solve a number of problems that occur when a conventional gripper drive wheel drives a gripper belt. That is, the engaging hole of the gripper belt and the convex tooth of the gripper drive wheel are engaged with each other in a state of good tooth contact, and the stress generated on both sides of the convex tooth by the action force of the gripper belt at the time of use is in one place. It will be distributed over a wide area without concentrating, thus prolonging the service life of the whole gripper drive wheel without breaking the convex teeth as easily as in the past.

[Brief description of drawings]

FIG. 1 is a partial side view of a wheel peripheral surface of a gripper drive wheel of the present invention.

FIG. 2 is a display view showing an engagement state between a convex tooth and an engagement hole in the gripper drive wheel of the present invention.

FIG. 3 is an external structural view of a conventional knitting machine.

FIG. 4 is a stereoscopic view of a gripper belt in a conventional knitting machine.

5 (a), (b) and (c) are side views showing structures and operating states of a gripper belt and a gripper drive wheel in a conventional knitting machine.

FIG. 6 is a display diagram showing an engaged state of a gripper belt and a gripper drive wheel in a conventional knitting machine.

FIG. 7 is a view showing a state in which the gripper belt and the gripper drive wheel are engaged with each other in another conventional knitting machine.

FIG. 8 is a display diagram showing an occlusal state in another conventional gripper drive wheel.

[Explanation of symbols]

 12 ... Gripper belt 121 ... Engagement hole 31 ... Wheel peripheral surface 32 ... Convex tooth 33 ... Recessed groove 331 ... Arc surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hoan Shushi Taiwan Taipei Couriertier 9 Cian 6 How (72) Inventor Son Morto Taiwan Taipei Pay Nimbochi 12 How 9 Low Two 3

Claims (3)

[Scope of utility model registration request] 1. Corresponding to a plurality of engaging holes (121) provided on the bottom surface of the gripper belt (12) at predetermined equal intervals,
A plurality of convex teeth (32) are provided on the peripheral surface (31) of the gripper drive wheel at predetermined equal intervals, and the plurality of convex teeth (32) are engaged with the plurality of engagement holes (121) to gripper the belt (1).
In a gripper drive wheel of a knitting machine that reciprocally drives 2); each convex tooth (3) in the wheel peripheral surface (31).
The concave grooves (33) are provided so as to be connected along the roots of both sides of 2) so that a better tooth contact can be obtained when the gripper belt (12) is engaged with the wheel peripheral surface (31). A gripper drive wheel for a knitting machine. 2. The gripper drive wheel for a knitting machine according to claim 1, wherein the connecting wall surface between the concave groove (33) and the roots on both sides of the convex tooth (32) is formed into an arc surface (331). . 3. The distance between the convex teeth (32) is 12.7.
and the radius of the circular arc surface (331) is 1.3,
The gripper drive wheel of the knitting machine according to claim 2, wherein the gripper drive wheel is mm.