JP2011122249A - Racking device in flat knitting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a racking device in a flat knitting machine, which uses one driving means as a driving source to move front and rear needle beds in mutually opposite directions through a driving force transmission means, thus reducing a racking time and improving knitting efficiency. <P>SOLUTION: The racking device in the flat knitting machine, in which one driving means is disposed; nut members are disposed on the front and rear needle beds, respectively. The nut members are threadedly engaged with a sending screw for the front needle bed and a sending screw for the rear needle bed, respectively, is characterized in that the rotation of the sending nut enables to slide the front and rear needle beds in the right and left directions, respectively, through the driving force transmission means for transmitting the driving force of the driving means. Thereby, the front and rear needle beds are moved in the mutually relatively opposite directions, and the racking can be carried out in a half distance and in a half time in comparison with a conventional racking device using one needling bed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a racking device for a flat knitting machine having at least a pair of front and back needle beds.

  Regarding racking that moves the front and back needle beds of the flat knitting machine to the left and right, Patent Document 1 shows that it can be freely performed with respect to the front and rear needle beds, and increases the length of the flat knitting machine in the horizontal direction. Therefore, the swingable swing amount can be increased without reducing the knitting efficiency.

JP-A-8-13294

  However, in that configuration, the front and rear needle beds are individually swung with a motor.

  An object of the present invention is to provide a racking device in a flat knitting machine that uses a single driving means as a driving source, moves the front and rear needle beds in the reverse direction via the driving force transmission means, and improves the knitting efficiency by reducing the racking time. Is to provide.

  In the present invention, a needle bed in which a plurality of knitting needles are arranged side by side is arranged in at least a pair of front and rear in a state in which the lip of the knitting needle is abutted, and nut members are provided on the front and rear needle beds, respectively, In a racking device of a flat knitting machine that is screwed into a bed feed screw and a back needle bed feed screw, and the front and back needle beds can be slid left and right by rotation of the feed screw, the front and rear needle beds are A drive means for transmitting the drive force of the drive means to one drive means for sliding the drive means and a feed screw provided on each of the front and rear needle beds; The front and rear needle beds slide relative to each other by driving the means.

  According to the present invention, the feed screws provided on the front and rear needle beds have different threading directions, and the feed screws are rotated through the driving force transmitting means for transmitting the driving force of the driving means. It is characterized by rotating in the direction.

  Furthermore, in the present invention, the feed screws provided in the front and rear needle beds have the same threading direction, and the feed screws are transmitted via the drive force transmitting means for transmitting the drive force of the drive means. It is characterized by rotating in different rotation directions.

  In the present invention, by simultaneously rotating the feed screw for moving the front and rear needle beds by the driving force transmitting means for transmitting the driving force of one driving means, and moving each needle bed simultaneously and in the opposite direction, Racking of the front and rear needle beds is possible with a single drive means, and the racking time can be shortened.

  Further, in the present invention, each feed screw corresponding to the front and rear needle beds can be rotated in the same rotational direction by driving one drive means, and the drive force is applied to two feed screws via one drive force transmission means. It can be configured with a simple mechanism that transmits

  Moreover, in this invention, since the threading direction of a feed screw is the same, the kind of a feed screw and a feed nut can be made common.

It is a side view of the racking apparatus in the flat knitting machine of the Example of this invention. FIG. 2 is a schematic plan view of FIG. 1. It is a figure which shows simply the relationship of the pulley of a modification, a driving force transmission means, and a drive means.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In this embodiment, a description will be given using a two-bed machine, but a known four-bed machine or a flat knitting machine having an auxiliary bed on the upper part may be used. The racking device is mainly shown, and the other parts of the flat knitting machine main body are omitted.

  FIG. 1 is a side view of a racking device in a flat knitting machine of the present invention. FIG. 2 is a schematic plan view of FIG. The front and rear needle beds 2 and 3 and the motor 35 are omitted. The flat knitting machine used in this example has a needle bed provided with a large number of knitting needles that are advanced and retracted by a carriage (not shown), arranged in a reverse V shape in the front-rear direction with the mouth of the knitting needles butted. Has been. The front and rear needle beds 2 and 3 are provided on the main body bed 1 so as to be slidable in the left-right direction.

  The racking sliding plates 6 and 7 to which the connecting blocks 10 and 11 to which the feed nuts 12 and 13 are screwed are fixed to the front and rear needle beds 2 and 3. Then, one ball screw 14 and 15 as feed screws is arranged in parallel below the front and rear needle beds 2 and 3, respectively. The ball screws 14 and 15 are supported by a bearing 22 with respect to a bracket 21 screwed to the main body bed 1. By screwing the ball screws 14 and 15 and the feed nuts 12 and 13, the front and rear needle beds 2 and 3 are fed through the racking sliding plates 6 and 7 and the feed nuts 12 and 13 are driven by rotation of the ball screws 14 and 15. Racking is performed in synchronization with the movement.

  Furthermore, pulleys 32 and 33 are arranged at the ends of the ball screws 14 and 15. One servo motor 35 (not shown in FIG. 2) fixed to a motor base 36 screwed to the bracket 21 is arranged so as to be positioned below the ball screws 14 and 15. In this embodiment, a servo motor is used as the driving means, but other types such as a stepping motor may be used.

  Further, as a mechanism for transmitting the driving force (rotation) from the servo motor 35 to the lateral movement of the front and rear needle beds 2, 3, the pulley 34 on the servo motor 35 side and the ends of the ball screws 14, 15 are arranged. Pulleys 32 and 33 fixed so that their positions are not displaced by the locking nut 28 are made to act as an open belt via a timing belt 37 which is a driving force transmission means.

  In this embodiment, ball screws 14 and 15 having different threading directions are used. The driving force (rotation) from the servomotor 35 is transmitted to the pulleys 32 and 33 by the timing belt 37, and the ball screws 14 and 15 rotate in the same direction. The ball screws 14 and 15 are reversely threaded, and the movements of the feed nuts 12 and 13 that are screwed in are relatively opposite to each other. Therefore, the front and rear needle beds 2 and 3 corresponding to the feed nuts 12 and 13 are also moved in the opposite directions, both of which move inward or outward, and are performed simultaneously. Therefore, half the distance and time are sufficient for the conventional racking by one needle bed, and the efficiency can be improved. A screw shaft may be used instead of the ball screw.

  When racking, it is necessary to control the movement (position) of the front and rear needle beds 2 and 3, and not only the rotation of the servo motor 35 but also the movement of the front and rear needle beds 2 and 3 from side to side is detected. (Not shown) is used for control.

  In the first embodiment, the description has been given using the ball screw having a different threading direction. In the second embodiment, the ball screw having the same threading direction is used to rotate each in a different rotation direction. Will be explained. Here, the driving force of the driving means will be described focusing on the mechanism in which the ball screw rotates differently via the driving force transmission means. Other configurations are the same as in the first embodiment.

  FIG. 3 is a diagram schematically showing the relationship among the pulley, the driving force transmission means, and the driving means. In FIG. 3A, the pulleys 41 and 42 are fixed to ball screws 47 and 48 provided for front and rear needle beds (not shown), respectively. The driving force of the servo motor 45 as the driving means is transmitted to the pulleys 41 and 42 via the timing belts 43 and 44 and the pulleys 40, 46 and 49 which are driving force transmitting means. For the timing belt 43, a double-tooth belt is used. By applying the timing belt as shown in the figure, the rotation directions of the pulleys 41 and 42 are reversed. Although the threading directions of the ball screws 47 and 48 fixed to the pulleys are the same, the rotation directions of the pulleys 41 and 42 are opposite to each other, and therefore in this embodiment, the feeding corresponding to the ball screws 47 and 48 is also performed. A nut (not shown) can move in the opposite direction.

  Also in FIG. 3B, the driving force of the servo motor 55 is provided to the front and rear needle beds (not shown) via the timing belts 53 and 54 and the pulleys 50 and 59 which are driving force transmission means. It is transmitted to pulleys 51 and 52 fixed to ball screws 57 and 58. By applying the timing belts 53 and 54 as shown in the figure, the rotation directions of the pulleys 51 and 52 are reversed. In this embodiment, the timing belt 53 spanned between the pulleys 51 and 52 is twisted 180 degrees to form a cross belt as shown in the figure. The driving force of one servo motor 55 corresponds to each ball screw by rotating the ball screws 57 and 58 having the same threading direction fixed to the pulleys 51 and 52 in the opposite directions as in the case (a). A feed nut (not shown) can be moved in the opposite direction.

  In the mechanisms shown in FIGS. 3 (a) and 3 (b), both the front and rear needle beds interlocking with the feed nut are moved inward by the drive of one servo motor, or both are moved outward. Each moves in the opposite direction. Moreover, since it is performed simultaneously, it becomes possible to carry out in half the distance and time with respect to the conventional racking by one needle bed, and efficiency can be achieved.

2 Front needle bed
3 Rear needle bed 14, 15 Ball screw 32, 33, 34, 41, 42, 51, 52 Pulley 35, 45, 55 Servo motor

Claims (3)

A needle bed having a plurality of knitting needles arranged side by side is arranged in at least a pair of front and rear with the lip of the knitting needles butted against each other, and nut members are provided on the front and rear needle beds, respectively, In the racking device of a flat knitting machine that can be screwed into a screw and a feed screw for the back needle bed, and the front and back needle beds can be slid left and right by the rotation of the feed screw,
One drive means for sliding the front and rear needle beds left and right;
Drive force transmission means for transmitting the drive force of the drive means is provided for the feed screws provided in the front and rear needle beds, respectively.
A racking device in a flat knitting machine, wherein the front and back needle beds slide relative to each other by driving of the one driving means.   The feed screws provided in the front and rear needle beds have different threading directions, and rotate the feed screws in the same rotational direction via the driving force transmitting means for transmitting the driving force of the driving means. The racking device for a flat knitting machine according to claim 1. The feed screws provided in the front and rear needle beds have the same threading direction, and rotate the feed screws in different rotational directions via the driving force transmitting means for transmitting the driving force of the driving means. The racking device for a flat knitting machine according to claim 1.

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