JPS6153453B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a racking device for a flat knitting machine.

Forming knitting can be achieved by increasing or decreasing the stitches of a knitted fabric produced by a flat knitting machine in an arbitrary course. However, when performing this stitch reduction, it is necessary to transfer the stitches. For example, to explain the process of transferring a feather needle, when transferring stitches from the front needle bed to the rear needle bed, as a preparatory operation, one needle bed is first moved by 1/2 pitch. Make sure that the needles on the rear needle bed can penetrate into the blades of the needles on the front needle bed. In other words, before the stitch transfer process, one needle bed is swung to the side by 1/2 pitch so that the needles in the front and rear needle beds are facing each other in a slightly straight line. It is necessary that it be sent. However,
With this positional relationship between the front and rear needle beds, that is, in this state, the knitting operation cannot be performed.

For this reason, in conventional flat knitting machines, stitch transfer was performed in one course of the carriage, and knitting was performed in the next course, but this invention allows The object of the present invention is to provide a racking device for a flat knitting machine that can perform both transfer and knitting operations.

That is, the racking device for a flat knitting machine according to the present invention has a needle bed slidably provided on the main body frame of the flat knitting machine, which is moved laterally in accordance with the rotation angle of the swing motor, and a carriage. A needle pitch detector capable of detecting the moving position on the needle bed as the number of needle grooves or the number of stitches from the end of the needle groove is installed on the carriage, and a needle pitch detector is installed on the carriage to detect the position of the drive command of the swing motor in advance as the number of needle pitches. A swing position designator that can be stored, a swing pitch setter that can store the rotation angle of the swing motor in advance, and a calculation of the stored values of the swing position designator and swing pitch setter and the detected value of the needle pitch detector. The flat knitting machine is characterized in that a control section for controlling the drive circuit of the swing motor is disposed in the flat knitting machine.

To explain the embodiment with reference to the drawings, reference numeral 1 denotes a main body frame, and on the top of the main body frame 1 formed in a chevron shape, needle beds 2 fixed to the main body frame 1 and needle beds 2 fixed to the main body frame 1 are arranged on the top of the main body frame 1 and slidable in the left and right direction. A needle bed 3 movably supported on the main body frame 1 is provided, and the needle bed 3 of this embodiment is slidable in a lateral guide groove 4 formed on the main body 1. It is fixed to a slider 5 fitted into the main body 1, and when the slider 5 is moved left and right, it is made to slide left and right on the main body 1. Reference numeral 7 denotes a presser foot for the slider 5, which is fixed to the main body 1. A window hole 8 is formed in the main body 1 toward the bottom of the guide groove 4, and a bracket 9 is fixed to the lower surface of the slider 5 through this window hole 8.
has been done.

On the other hand, a swing motor 12 is fixed to a proper position of the main body 1 via a reduction gear box 11 fixed thereto, and an output shaft 13 of the swing motor 12 is fixed thereto.
is connected to the ball screw 15, which is its output shaft, via the reduction mechanism 14 in the reduction gear box 11.
is connected to. This ball screw 15
is supported through a radial bearing 16 and thrust bearings 17 and 18 so as to be rotatable but not movable in the left and right direction. The screw member 1 has its flange portion 19a fixedly supported by the bracket 9 and is positioned in a through hole 20 formed in the bracket 9.
9 are screwed together via a ball (not shown).

In the above embodiment, an example was shown in which the screw shaft to be threaded into the threaded member 19 was configured with a ball screw 15, but in other embodiments, this was made into a normal lead screw shape, and the screw shaft was threaded into the threaded member 19. Joining member 19
Of course, it may also be in the form of a nut which is screwed onto it.

In any case, when the needle bed 3 is connected to the swing motor 12, which is its drive source, through the movement mechanism described above, when the swing motor 12 is driven, the ball screw is rotated by an angle corresponding to the rotation angle of the swing motor 12. 15 is rotated in the forward or reverse direction, and therefore, the needle bed 3 can be swung by a desired amount to the left or right depending on the direction and angle of rotation of the swing motor 12. The racking device according to the invention is provided with the following control device for limiting the point in time when the swing motor 12 can be driven.

That is, on the carriage 25 of this flat knitting machine, there is a needle at a suitable position that can detect the position of the carriage 25 while it is moving on the needle bed 2 as the number of needle grooves or the number of stitches from the needle groove end 26a. A needle pitch detector 27 is provided, and this needle pitch detector 27
The detected value, that is, the position of the carriage on the needle bed 2 while it is running, is sent to the main arithmetic circuit 31 of the control section 30 of the racking device according to the present invention via the width shaping circuit 28. It is designed to be input (Figure 4).

Further, the control section 30 of the racking device according to the present invention includes a swing position designator 35 consisting of a swing motor drive position input command section 32 and a drive position point input storage circuit 33, and a swing pitch input command section 3.
6 and a swing pitch setting device 40 consisting of a swing pitch input designation storage circuit 37. The transmission position of the command is stored as the number of needle pitches from the needle groove end 26a.
The stored values stored in the swing position designator 35 and the swing pitch setter 40 are input to the main calculation circuit 31.

In this way, the main arithmetic circuit 31 of the control section 30
The detection value from the needle pitch detector 27 (the number of needle pitches from the needle groove end 26a indicating the position of the carriage 25 during travel) and the memory value of the swing position designator 35 (the number of needle pitches from the swing motor 12 for each course) are included. The drive position point where the drive signal can be inputted is stored as the number of needle pitches) and the value stored in the swing pitch setting device 40 (the number of needle pitches is stored in the swing motor 1).
2) is input and calculated, and according to the calculation, the carriage 2 is moved to the specified drive position point.
5, the swing motor control circuit 41 is driven and controlled as set in the swing pitch setting device 40.

That is, the carriage 25 shown in FIG.
For example, if transfer cams 50 as shown in FIG. However, after the preceding transfer cam 50 acts on one of the knitting needles to complete the stitch transfer, until the following knitting cam 51 acts on that needle, the number of stitches changes. The carriage 25 is moved by a stroke α of many pitches. The latching device according to the present invention is capable of performing the latching operation while the carriage 25 is traveling this stroke α, and the swing position designator 35 is configured to indicate the stroke If one point on α is selected and the selected point is the drive position point of the swing motor 12, that is, the traveling position of the carriage 25 where it is safe to input a drive signal to the swing motor 12, then it is determined that the selected point is the drive position point of the swing motor 12. Even the pitch number is input and stored in advance.

Therefore, according to the racking device of the present invention, even when the carriage 25 is traveling on the needle bed, when the carriage 25 passes the position specified by the swing position designator 35, when the carriage 25 reaches the position, A drive command for the swing motor 12 is input to the swing motor control circuit 41, and the swing motor 1
2 is now being driven.

At that time, the swing motor 12 is driven to rotate at a rotation angle necessary to rack the number of pitches input and stored in the swing pitch setting device 40, but the swing motor 12 includes a pulse motor, Alternatively, a DC servo motor can be used.

That is, when a pulse motor is used as the swing motor 12, the swing motor 12 can be controlled in an open loop as shown in FIG. 5A, and a DC servo motor is used as the swing motor 12. In this case, this can be controlled by a closed loop method as shown in FIG. 5B. That is, according to the illustrated closed-loop control system, a DC servo motor can be rotated by a specified number of pulses in the same manner as a pulse motor.

The example shown in FIG. 4 relates to a case where a DC servo motor is used as the swing motor 12, and a feedback control circuit 42 is shown.

The racking device for a flat knitting machine according to the present invention is configured as described above and can be operated as described above, so that, for example, the racking device of the present invention can perform the following operations. Stitch transfer for reducing stitches during forming and knitting and knitting can be performed in one course of the carriage 25.

That is, in FIG. 6, if 60 ₁ and 60 ₂ are two sleeve parts that are formed and knitted at the same time by one flat knitting machine, then when the carriage 25 is moving to the right, the preceding transfer cam 50 is Before reaching the stiff knitting needles of the left sleeve part ₆₀₁ , the needle bed 3
1/2 pitch to make the front and back knitting needles face the stitch transfer position. This control is carried out by the racking device of the present invention, but its details will become clear from what will be described later, so a description thereof will be omitted. In any case, by first lacing as described above and transferring the stitches using the right transfer cam 50, the left side of the sleeve portion ₆₀₁ is reduced first, and thus the left side of the sleeve portion ₆₀₁ is At a time after the stitches have been transferred to reduce the number of stitches, while the carriage 25 moves through the stroke α until the knitting cam 51 reaches the leftmost stitch of the sleeve portion ₆₀₁ , the carriage 25 moves to this position. The needle pitch detector 27 detects that the vehicle is running. On the other hand, in the control section 30, a predetermined point equal to this stroke α is stored in advance in the swing position designator 35, and a swing pitch of -1/2 pitch is stored in advance in the swing pitch setting device 40. . In this case, while the carriage 25 is traveling the above stroke α, the needle bed 3 is swung back by 1/2 pitch, and the knitting cam 51 of the carriage 25 is moved to the leftmost stitch of the sleeve portion _601. When this is reached, the front and rear needle beds 2, 3 can be moved to maintain the normal knitting position.

Similarly, the knitting cam 51 is connected to the sleeve portion 6.
0 ₁ until the preceding transfer cam 50 reaches the leftmost stitch of the right sleeve portion 60 ₂ , the needle pitch detector detects that the carriage 25 is traveling at that position. 27, the detected value is input to the control unit 30, and the swing position designator 35 and swing pitch setting device 40
If it is stored in advance to cause 1/2 pitch rattling at the position, the left end of the sleeve portion ₆₀₂ can be transferred and reduced by the preceding transfer cam 50.

It will be easily understood from the above description of the sleeve portion ₆₀₁ that the needle bed 3 can then be swung back by 1/2 and the knitting cam 50 can knit the sleeve portion ₆₀₂ in the course.

The above embodiment describes an example in which knitting is performed after transferring stitches in the same course, but according to the racking device of the present invention, knitting is performed using the preceding knitting cam in the same course, then racking is performed, and knitting is performed on the following knitting cam. It is also possible to transfer the stitches using a transfer cam.

In any case, according to the racking device of the present invention, the position of the carriage traveling on the needle bed is detected moment by moment by the needle pitch detector on the carriage as the number of needle pitches from the end of the needle groove, and the detected value is is input to the control unit, and the rucking drive position point at which the needle bed can be rucking is input and stored in the control unit as the number of needle pitches. The drive rotation angle of the swing motor for the swing pitch, that is, the racking drive, is inputted and driven, and the drive point and amount of drive of the swing motor are determined only in accordance with what is calculated by the control section. , since it is controlled in relation to the traveling position of the carriage on the needle bed.
When inputting the required commands in advance to the swing position designator and swing pitch setter of the control section, select a point in time when the transfer cam or knitting cam is not acting on the knitting needles even while the carriage is running. Thus, the needle bed can be driven by a desired amount.

[Brief explanation of the drawing]

The figure shows one embodiment of this invention.
The figure is a front view of the knitting machine showing only the main body frame, needle bed, and carriage, Figure 2 is a vertical cross-sectional front view of the main parts (the cross section is along the - line in Figure 3), and Figure 3 is a vertical cross-sectional side view of the same. (The cross section is along the - line in Figure 2), 4th
The figure is a block diagram of the control circuit of the racking device, Figure 5 is a block diagram of the control circuit of the swing motor, and Figure 6 is a block diagram of the control circuit of the swing motor.
The figure is an explanatory diagram of the latching operation position showing the relationship between the cam device provided on the carriage running on the needle bed and the knitted fabric hanging on the knitting needles on the needle bed. 1...Body frame, 2, 3...Needle bed, 12...
...Swing motor, 25... Carriage, 56a...
Needle groove end, 27... Needle pitch detector, 30... Control unit, 35... Shake position designator, 40... Shake pitch setter.

Claims (1)

[Scope of Claims] 1. A needle bed is slidably provided on the main body frame of a flat knitting machine and is moved laterally according to the rotation angle of the swing motor as the swing motor rotates, and the position of the carriage on the needle bed during movement is provided. A needle pitch detector that can detect the number of needle grooves or stitches from the end of the needle groove is disposed on the carriage, and a swing position designator that can store in advance the transmission position of the drive command of the swing motor as the number of needle pitches. , a swing pitch setting device capable of storing the rotation angle of the swing motor in advance, and a drive circuit for the swing motor by calculating the stored values of the swing position designator and swing pitch setting device and the detected value of the needle pitch detector. A racking device for a flat stockinette knitting machine, characterized in that a control unit for controlling the flat knitting machine is disposed on the flat knitting machine. 2. The racking device for a flat knitting machine according to claim 1, wherein the control section has a feedback control circuit that detects the rotation angle of the swing motor and inputs the detected value to the swing motor control circuit. .