JPS6088157A - Traverse knitting machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Object of the Invention) The present invention relates to an improvement in a flat knitting machine, and more particularly to a flat knitting machine in which most of the control device is built into the carriage, eliminating the need for a separate control device.

(Prior Art) Fig. 1 shows an example of a conventional flat knitting machine, in which two needle beds 2.2, front and rear, are arranged on a machine body 1 at an angle in a roof shape.
A carriage 3 driven by a motor reciprocates in the horizontal direction above the needle bed 2. Various yarns of different colors, etc. are supplied to a carrier 5 via a top spring 4 equipped with a yarn breakage and yarn edge detection device, and a switching unit 6 provided on the carriage 3 selects a desired carrier 5. do.

A comb-shaped scale 7 is provided on the machine body 1 in parallel with the needle bed 2, and a photoelectric position detector 8 attached to the carriage 3 detects this to detect the current position of the carriage 3. A cam provided on the bottom surface of the carriage 3 acts on a group of knitting needles 9 and a group of jacks 10 provided on the needle bed 2 to obtain a desired knitted fabric. The knitted fabric is appropriately pulled and unwound by the winding section 11. These operations are controlled by a separate control device 12. The control device 12 includes a central processing unit (CPU) composed of a microprocessor and the like.
) Built-in RAM or ROM storage device, input/output interface circuit, cam solenoid drive circuit, power supply circuit, all other necessary electrical circuits, keyboard, display device, optical character reader (OCR), etc. A large number of signal lines and power lines are connected between the control device 12 and the carriage 3, ceiling spring 4, etc. When using this conventional flat knitting machine, data on a paper tape created in advance is read into the control device 12 via OCR so that a desired knitted fabric can be obtained.

In the conventional flat knitting machine described above, the amount of electric wires between the control device 12 and each operating device, especially the carriage 3 having a large number of cam solenoids, is enormous, and at the same time the carriage 3 moves back and forth. This makes it even more difficult to handle the electric wires, and a great deal of cost and labor is spent on these wiring operations.

Further, it has disadvantages such as the need to consider the influence of noise due to long wiring and the risk of frequent failures due to disconnection.

(Object of the Invention) The present invention has been made in view of the above-mentioned difficulties, and most of the control device is built into the carriage, thereby significantly reducing the large amount of connecting wires that were conventionally required. The purpose is to facilitate wiring work and reduce failures due to disconnections.

(Technical Means of the Invention) The present invention provides a group of cams that reciprocate horizontally above a needle bed and act on a large number of knitting needles and jacks disposed on the needle bed, and a large number of cams that drive the cam group. In a flat knitting machine having a carriage provided with a solenoid, the carriage includes a control unit including at least a central processing unit, a storage device, an input/output interface circuit, and a solenoid drive circuit for controlling the solenoid; The device is characterized in that it is equipped with an operation section including at least a keyboard and a display device.

(Example) Hereinafter, the present invention will be described by way of an example with reference to the drawings.

In FIGS. 2A and 2B, two needle beds 14.14, front and rear, are arranged on the machine body 13, and the carriage 15 is placed very close above the needle bed 14 along the rail 16.16. It is possible to move back and forth in the horizontal direction. Carriage 15
consists of two box-shaped bodies 15a and 15b, and a body 1.
It consists of an arch-shaped connecting member 15c that connects between 5a and 15b. A photoelectric position detector 17 is attached to one main body 15a, and detects the current position of the carriage 15 by detecting a comb-shaped scale I8 provided parallel to the rail 16. An arm 19 extending horizontally backward protrudes from the other main body 15b, and a connecting piece 20 at the middle of the arm 19 is circulated by a motor 21 via a chain 22a1, a small sprocket 22b, and two large sprockets 22c, 22c. The carriage 15 is reciprocated by engaging with a driven drive chain 23 in a well-known manner, and a control cable 24 is led out from the tip of the arm 19.
4 is suspended in a spiral from a large number of pulleys 26 sliding on rails 25 fixedly stretched over the fuselage 13, and is connected to the fuselage 13 for signals and power.

Two poles 26, 26 are vertically provided on the left and right sides of the machine body 13, and a bar 29b is used to attach a stand 28 for placing the winding thread 27 on the ball 26 and a top spring 29. is installed. The top spring 29 is of a well-known type and has a device 29a for detecting thread breakage, thread binding, etc. On the other hand, above the center of the needle bed 14, there are many rails 30,
... is installed, and a well-known carrier 31 ... is movable along the rail 30, and the thread 27a from the winding thread 27 is transferred to the needle bed 14 by the carrier 31 via the above-mentioned ceiling spring 29. It is supplied to the provided knitting needles 43a. The above-mentioned connecting member 15c is connected to the carriage 15 by selecting a necessary carrier 31 from among these carriers 31.
A conversion section 32 is provided for reciprocating the movement.

A rotation bar 33 provided on the front surface of the body 13 is gripped by hand and rotated to operate a switch 34 for turning on and off the travel of the carriage 15. Reference numeral 35 denotes a winding device for winding up the knitted fabric A, which is rotationally driven by a torque motor, and the winding strength is adjusted by controlling the voltage supplied to the torque motor. 35a is an adjuster for manually adjusting the winding strength. 36 is a counter for counting and displaying the number of knitted fabrics A, 23a is a handle for manually moving the carriage I5, and 37 is a power board for controlling the motor 21 and the like and supplying power.

In FIGS. 3A to 3C, the main body 15a of the carriage 15
has a box shape in which an upper box 38 and a lower box 39 are stacked one on top of the other. The upper box 38 is provided with a recess 38a and has a generally concave shape when viewed from above, and the above-mentioned connecting member 15c is connected to the recess 38a.
8a and is attached to the upper surface of the lower box 39 with bolts. On the top surface of the upper box 38, there is a keyboard 40C including a numeric keypad, function keys, etc.
An operating section 40 is provided, which includes a display device 40b including a numerical display and a blinking display, etc., and a changeover switch 40a for temporarily interrupting the operation of the flat knitting machine. A data recorder 41 for storing or reading data on a magnetic tape regarding the knitting method to obtain the above is inserted from above into a slide fitting 42, 42 having a slit attached to the upper surface of the upper box 38, and the installation is performed as follows. It is designed to be removable. Inside the upper box 38, a control section 55, which will be described in detail later, is constructed using a printed circuit board or the like and is accommodated. Further, on the lower surface of the lower box 39, a first cam group 44 and a second cam group are provided for respectively operating a needle group 43 consisting of a large number of knitting needles 43a, a middle jack 43b, and a pit jack 43c provided on the needle bed 14. Cam group 44.45.4 consisting of cam group 45 and third cam group 46
A solenoid 47a and a pulse motor 47b for driving these cam groups 44, 45, 46 are housed inside the lower box 39. The third cam group 46 includes initializing cams 46a for lifting and aligning the lower end of the focusing jack 43c above the needle bed 14.
A pit jack cam 46b for selectively pushing down the pit jack 43C into the needle bed 14 by acting on the butt 43d of the pit jack 43c, and a pit jack cam 46b acting on the pit jack 43c that has not been pushed down toward the tip end. There are push-up cams 46c, 46c, etc. for simultaneously pushing up the middle jack 43b and knitting needle 43a, and the second cam group 45 includes a tuck/transfer cam 45a.
, 45a.

Tank cam 45b, 45b, and knit cam 45C
The first cam group 44 includes a transfer cam 44a, a transfer cam 44b, a dowel cam 44c, and the like. Among these cams, the rotation cam 44C is driven by a pulse motor 47b, and the others are driven by a solenoid 47a.

A ventilation window 48 is provided on the side surface of the upper box 38 and the lower box 39 in the running direction, and a punched metal 48a having a large number of holes is stretched over the top of the window 48. 49 is a roller. The other main body 15b of the carriage 15 is configured symmetrically with the main body 15a and is integrally connected by a connecting member 15c, but in this embodiment, the control section 55, the operating section 40, etc. are provided only on the front main body 15a. The rear main body 15b
It is not provided. However, these main bodies 15a, 15
It is possible to appropriately distribute and store it in B.

Now, FIG. 4 is a block diagram showing the control circuit of this flat knitting machine, which includes a central processing unit 50 composed of a microprocessor, etc., a storage device 51 composed of RAM 51a and ROM 51b, and an input/output interface circuit 52. .52
, a display output circuit 53 that drives the display device 40b, and drive circuits 54a and 54b that drive the solenoid 47a and pulse motor 47b.
The aforementioned keyboard 40c, changeover switch 40a, position detector 17 for the carriage 15, and detection device 29 for the top spring 29
A, a data recorder 41, etc. (not shown), a switch 34 turned on and off by a rotating bar 33, a power board 37, etc. are connected via an input/output interface circuit 52 or other suitable interface circuit.

One of the features of this embodiment is that the control unit 55 is housed within the main body 15a, and this is possible because the drive circuit 54a of the solenoid 47a has been improved. That is, in the past, due to the need to operate the cam group 44, 45, 46 at high speed, a large solenoid with strong suction force was used, or a large capacitor or resistor was combined to increase the activation force of the solenoid. Due to their large size and the need to provide sufficient space to prevent temperature rise due to heat generated by solenoids, resistors, etc., these were not installed in a carriage that moved back and forth. It had not been thought of to store it. However, in this embodiment, both the drive circuit 54a and the solenoid 47a are miniaturized, and the control unit 55 is housed in the carriage 15 by using the drive circuit 54a, which can operate the solenoid at high speed and generates less heat. This made it possible.

FIG. 5 shows the main part of the drive circuit 54a, and the solenoid 47a is connected in series with the emitter and collector of a holding transistor TI and an accelerating transistor T2, respectively, and connected to a high-voltage accelerating power source E2. A low-voltage holding power source E1 is connected to a connection point between both transistors TI and T2 via a diode DI for preventing backflow. Each transistor T
The base of I, T2 has photocouplers Pct, PC
2 outputs are connected, photocoupler PCI,
The input side of PC2 is the holding input Inl and the acceleration input In.
2. Although not shown, solenoid 4
The signal for activating 7a is connected to be input to the holding input Inl, and when this signal is input, the output signal of a one-shot multivibrator that emits a signal only for a certain period of time is the acceleration input. It is connected to be input to In2. D2 is a commutation diode.

To explain the operation of the drive circuit 54a, for example, the rated voltage 2
For the solenoid 47a of 4V, the holding power supply E1 is 16.
If you set the voltage to 5V and the acceleration power supply E2 to 40.5V,
A voltage of about 16 V is applied to the solenoid 47a when only the transistor Tl is on, and about 40 V when the transistors TI and T2 are on.

Referring also to FIG. 6, when the solenoid drive signal is input at t=tl, this signal is input to both the holding input 1nl and the acceleration input In2 for about 5 m2 sec, and the transistors TI and T2 are inputted. When the solenoid 47a is turned on, a voltage of approximately 40V is applied to the solenoid 47a. As a result, a current larger than the rated current flows through the solenoid 47a, generating a strong starting force, which accelerates the cam and causes it to operate at high speed. When approximately 5111 seconds have elapsed and the acceleration input In2 is no longer input, the transistor T2 is turned off and a voltage of approximately 16V is applied to the solenoid 47a. Although the holding current at this time is lower than the rated current, it is sufficiently possible to maintain the operating state of the solenoid 47a by adjusting the load force applied to the solenoid 47a appropriately. a certain period of time, e.g. 20
When the input to the holding input 1nl disappears after m sec, the solenoid 47a returns to the non-operating state.

FIG. 7 is a diagram illustrating the operating mechanism of the pit jack cam 46b as an example of a cam. The pit jack cam 46b rotates around a shaft 56 and has some play with the tip of the plunger 57 of the solenoid 47a. connected. When the solenoid 47a is turned on, the plunger 57 is attracted against the spring 58, and the pit jack cam 46b is rotated to the right in the figure to the position shown by the dashed line. When the solenoid 47a is turned off, it is returned by the spring 58. When the solenoid 47a is turned on, the pit jack cam 46b does not come into contact with the butt 43d of the pit jack 43c, so the pit jack cam 46b is not pushed down, and the pit jack cam 46b is selected and the push-up cam 46C acts next. That will happen. Since the force pushing down the pan 43d of the bit jack 43C is received by the shaft 56, the solenoid 47
It is sufficient for a to generate enough force to simply rotate the pit jack cam 46b, and even a small solenoid 47a can perform high-speed operation.

In FIGS. 3A and 3B, 24a is a cable,
This cable 24a connects signals and power between the control unit 55 and the fuselage 13 side such as the detection device 29a of the ceiling spring 29, the switch 34, and the power panel 37, as well as the necessary wiring connections within the carriage 15. It is.

The storage device 51 of the control unit 55 stores the four basic operating numbers ζ of the flat knitting machine, and the data for controlling the knitting needles 43a to obtain individual knitted fabrics is stored in the display device 40b. Operate keyboard 40C while looking at R.
It is designed to be created on the A M51a. Once the data is created, it can be executed immediately, but it is stored on a magnetic tape by the data recorder 41 for data preservation. Therefore, from the next time onwards, if data is loaded from the magnetic tape to the RAM 51a, it can be executed immediately. The display device 40b displays data related to the edited content, input from the keyboard 40c, error messages, and the like.

The knitting speed is determined by changing the speed of the motor 21 that drives the carriage 15.

In the flat knitting machine configured as described above, since the control section 55 and the operation section 40 are installed in the main body 15a of the carriage 15, a large number of solenoids 47'a and pulse motors 47
b can be made within the carriage 15, and the number of core wires of the cable 24 for connection to the body 13 side can be significantly reduced. Since ventilation windows 48 are provided on the sides of the upper box 38 and lower box 39 in the running direction of the main bodies 15a and 15b, ventilation is automatically generated as the carriage 15 moves, and a cooling effect can be obtained. A special fan for cooling section 55 can be omitted.

Edit data can be easily created using the operating section 40 provided on the carriage 15, and data can also be easily loaded and stored using the data recorder 41.

(Effects of the Invention) According to the present invention, since the control unit and operation unit are provided within the carriage, the large amount of connecting wires that were conventionally required can be significantly reduced, facilitating wiring work and reducing failures due to disconnection. can be achieved. Furthermore, if the carriage is provided with a window for ventilation, the control section will be cooled by the ventilation automatically as the carriage runs, making it possible to omit a cooling fan.

[Brief explanation of drawings]

FIG. 1 is a front view schematically showing a conventional flat knitting machine, FIGS. 2 to 7 show an embodiment of the present invention, FIG. 2A is a front view of the flat knitting machine, and FIG. 2B is a front view of the flat knitting machine. ■B5 1■B1l1t sectional view of Figure 2A, Figure 3A is a front view of the vicinity of the carriage, Figure 3B is a side view of the same, Figure 3C is a bottom view of the main body of the carriage, Figure 4 is the control section. Fig. 5 is an electric circuit diagram showing the main parts of the drive circuit, Fig. 6 is a timing diagram to explain the operating state of the drive circuit, and Fig. 7 is an enlarged cross-section showing the vicinity of the pit jack cam. FIG. 14... Needle bed, 15... Carriage, 15a, 15
b...Main body, 40...Operation unit, 40b...Display unit, 40C...Keyboard, 43a...Knitting needle, 43b
...Medium jack (jack), 43c...Bit jack (jack), 44...7th cam group (cam group), 45...2nd cam group (cam group), 46...No. 3 cam group (cam group), 47a... solenoid, 48.
... window, 50... central processing unit, 51... storage device, 52... input/output interface circuit, 54a...
Drive circuit (solenoid drive circuit), 55...control unit. - Applicant Imaizumi Seisakusho Co., Ltd. 7 6 Figure 4 Figure 5 401- Figure 6 Figure 1 Figure 7

Claims (1)

[Claims] / A cam group that reciprocates horizontally above the needle bed and acts on a large number of knitting needles and jacks disposed on the needle bed, and a large number of solenoids that drive the cam group. In the flat knitting machine, the carriage includes a control section including at least a central processing unit, a storage device, an input/output interface circuit, and a solenoid drive circuit for controlling the solenoid, and at least a keyboard and a display device. A flat knitting machine characterized by being equipped with an operation section including: 2. The carriage has a box-shaped main body, the cam group and the solenoid are on the bottom of the main body, and the control section is inside the main body and above the solenoid.
Claim 1, wherein the operating units are arranged on the upper surface of the main body, and a ventilation window is provided on a side surface of the main body in the running direction. Flat knitting machine.