JPH0681257A - Lapping-controlling mechanism in raschel knitting machine - Google Patents

Abstract

PURPOSE:To accurately operate a reed by controlling the width of the transverse movement of the transversely moving lever of a lapping mechanism through a communication cylinder. CONSTITUTION:A main cylinder 1 receiving a driven piston 2 contacting or engaging with the transversely moving lever 10 of a raschel movement mechanism is communicated with two sub-cylinders 3, 4 having driving pistons therein, respectively, and the pressure in the cylinders 1, 3, 4 is constantly kept through a pressure regulator 9 disposed in a connecting pipe 8 connecting the main cylinder 1 to an oil tank 7, in the lapping movement of the reed of a raschel knitting machine. The driving pistons 5, 6 are operated on the basis of signals outputted from an electric signal-outputting device, and their projection positions are selectively combined with each other, whereby the movement of the driven piston 2 returned to a base position for each transverse movement of the transversely moving lever 10 is adjusted to control the width of the transverse movement of the transversely moving lever 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Raschel knitting machine having an improved method for controlling the wrapping movement of a reed.

[0002]

[Prior art and its problems] Raschel knitting machine
It is performed by controlling the reed swing that crosses the Bella needle group and the wrapping that occurs before and after the Bella needle. The reed swing is a relatively simple movement performed by a cam or crank, but the wrapping is controlled using a pattern wheel or chain link. The pattern wheel is a wheel in which the radius is changed and the height is changed stepwise around the periphery, and the chain link is a chain in which 47 kinds of pieces with different heights are connected by pins.
By rotating or running these, the wheel fixed to the lateral movement lever is displaced, the lateral movement width of the lever is changed according to the displacement amount, and the pusher rod attached to the wheel causes the reed to perform a lapping motion.

Since the former selects and arranges wheels corresponding to the movement of each reed, it is suitable for mass production of a small variety of products with a relatively small structure and its handling is easy. However, the latter chain link can control the reciprocating movement of each reed,
It is necessary to select and arrange the types of pieces, and depending on the type of handle, the length of each chain may be 20 to 30 m or more.

Therefore, in order to control the movement of the reed using the chain link, it is necessary to connect the chain links with a great deal of labor, which can be said to be a bottleneck in streamlining the knitting process.

In order to solve this problem, the applicant adopted an L-shaped swing lever instead of the lateral movement lever, and combined this with a piezoelectric actuator element to control the movement distance of the pushing rod of the lapping mechanism. Japanese Patent Application for the device 3
-354233. However, in order to accurately control the lever by this mechanism, it is assumed that the quality of the piezoelectric actuator element is constant, and if the quality of this element varies, the device cannot operate correctly. I was left with a problem.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to accurately operate a reed by controlling a lateral movement lever of a lapping motion mechanism in a Raschel knitting machine using a communication cylinder.

[0007]

[Technical Means] Technical means for solving this technical problem are (a) a main cylinder accommodating a driven piston,
(B) Two auxiliary cylinders communicating with the main cylinder,
(C) A drive piston housed in each sub-cylinder, and (d) a constant pressure device for maintaining a constant pressure in the communicating cylinder, and (e) a driven piston is brought into contact with or engaged with a lateral movement lever, (F) The driven piston is operated by advancing and retracting the drive piston and selectively combining the positions thereof,
To control the lateral movement width of the lever.

A second technical means is to control the projecting position of the drive piston by an electric signal output device,
A third technical means is to return the driven piston to its original position after each lateral movement of the lever.

[0009]

[Operation of technical means] Since the main cylinder and the sub cylinder are communicated with each other and the pressure in the front cylinder is kept constant by the constant pressure device, the pistons housed in the respective cylinders are advanced and retracted. Then, the remaining piston will move.

When the pistons housed in the respective sub-cylinders are advanced and retracted and their positions are selectively combined, and when the corresponding positions are interposed, the protrusion length of the driven piston changes corresponding to the positions. . Since the driven piston is brought into contact with or engaged with the lateral movement lever for controlling the lapping motion, the lever is laterally moved, and the pusher rod attached to the lever is advanced and retracted to wrap the reed. The driven piston can be directly engaged with the lateral movement lever, and can be indirectly engaged with another pusher load, a seesaw rod, or the like. As the lateral movement lever, a lever that has been conventionally used may be used as it is.

The chain link is constructed by selectively connecting pieces having different heights in 47 steps. The diameter of the drive piston, the setting of the advancing / retreating distance and the combination thereof, and the mounting position with the lateral movement lever are set. By selecting the diameter of the driven piston, etc., the change in the movement amount of the drive piston can be made to correspond to the movement amount of the driven piston, and the lateral movement width of the lateral movement lever can be changed in the same way as when using a chain link. it can.

Therefore, by moving the driving piston forward and backward, the protruding length of the driven piston can be accurately controlled, and the lateral movement lever can be laterally moved by a desired width. Therefore, the same function as that of the conventional chain link can be achieved. It will be fulfilled.

When the drive piston uses an electric signal output device, the lapping motion mechanism can be electrically controlled. In this case, the electric piston actuates the drive piston via a solenoid, an air cylinder or the like (claim 2). Further, when the driven piston is returned to the original position after each lateral movement of the lever, all the operations are performed with reference to the original position, so that the protruding position of the driven piston can always be controlled accurately.

[0014]

As a result of being able to control the wrapping movement of the reed in the Raschel knitting machine by using the communication cylinder, there is an advantage that the connecting of the pieces becomes unnecessary and the preparation process for the weaving work can be saved. Further, since the control of the advancing / retreating of the piston can be electrically controlled, the input information can be stored in a magnetic tape, a disk, or the like, so that it is not necessary to connect the pieces for each weaving or knitting to form a chain.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific examples of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of a cylinder, in which a sub-hydraulic cylinder 3 is provided at the lower end of the main hydraulic cylinder 1.
4 is fixed in communication with each other, and a driven piston 2 and drive pistons 5 and 6 are respectively inserted therein. The piston 2 is in contact with a traverse lever 10 which constitutes a lapping mechanism of a knitting machine.

The cylinder 1 includes an oil tank 7 and a connecting pipe 8.
The oil is supplied into the cylinder 1 by a motor (not shown). A pressure adjusting valve 9 is arranged in the connecting pipe 8, and the hydraulic pressure in the cylinder 1 is
It is designed to keep constant at all times.

In the present embodiment, each piston has the following design. Outer diameter of drive piston = 10.6 mm Outer diameter of drive piston 6 = 4.0 mm Outer diameter of driven piston 1 = 17.9 mm Moving width of pistons 5 and 6 = 10.0 mm

In this device, the drive pistons 5 and 6 each move in six steps at a pitch of 10.0 mm, and the oil amount in one pitch of the piston 5 is 0.882 cm ^3.
(5.03 ² × π × 1), the amount of oil in one pitch movement of the piston 6 is 0.1256 cm ³ (0.4 ² × π × 1).
It becomes 1). Therefore, if the movement amount of each piston is zero, the pistons 5 and 6 can be combined in 49 ways, and the movement change amount of the driven piston 2 (unit: m
m) is approximately as shown in Table 1 (the length of the driven piston at the starting point is set to 0.5 mm), and the conventional lateral movement lever is moved. It should be noted that the dimensions of the piston and the setting of the moving width are designed as appropriate, and are not limited to the above dimensions.

[0019]

[Table 1]

FIG. 2 shows an example of drive means for moving the drive pistons 5, 6 to a predetermined size. Rods 11 and 11 are arranged coaxially with the respective drive pistons 5 and 6 so as to be able to move forward and backward, and the tips thereof contact the pistons 5 and 6,
The rear end is connected to the select box 13 (in this embodiment, it is connected via the link rod 12).

In the select box 13, six pins 14 and 14 are arranged at a 10.0 mm pitch in a state of being biased to one side edge side at a right angle to the longitudinal direction using a spring 12, and each pin is arranged at a pitch of 10.0 mm. Solenoids 15, 15 are arranged outside the tip of 14 on the same axis as the pin 14. A claw 16 is arranged outside the other side edge of the selected box 13, and reciprocates along the side edge.

The above-mentioned driving means may be installed one for each lever 10, but two or more may be installed. In this case, the step of giving a signal to the remaining driving means to excite the solenoid while the one unit is reciprocating, preparing for the next lapping motion, and the one unit not moving backward. It is possible to move the other drive means forward with
Weaving can be speeded up.

When the solenoids 15, 15 are selectively excited by using an electric signal output device (not shown) and the movable core thereof presses the pin 14, the rear end of the pin 14 projects from the select box 13 and reciprocates. Is engaged with this during forward movement to advance the select box 13, and the rod 11 advances the drive piston. Reference numeral 17 is a guide for moving the select box 13 back and forth.
In this case, since the pins 14 and 14 are arranged at a pitch of 10.0 mm, it is possible to select the projecting position according to the pitch intervals of the drive pistons 5 and 6.

The mechanism for returning the driven piston to the original position for each operation is not shown. A known mechanism may be adopted, such as a locking piece protruding from the advancing / retracting bar being locked to the driven piston and forcibly returning after each operation.

[Brief description of drawings]

FIG. 1 is a schematic mechanism diagram of a communication cylinder.

FIG. 2 is a drive mechanism diagram of a drive piston.

[Explanation of symbols]

1 main cylinder, 2 driven pistons, 3 and 4 sub cylinders, 5 and 6 drive pistons, 10 lateral movement lever,
11 rods, 13 select boxes, 14 pins, 15 solenoids, 16 (reciprocating motion) claws

Claims (3)

[Claims] 1. A main cylinder containing a driven piston, two sub-cylinders communicating with the main cylinder, a drive piston housed in each sub-cylinder, and a constant pressure device for maintaining a constant pressure in the communicating cylinders. The Raschel knitting that controls the lateral movement width of the lever by abutting or engaging the driven piston with the lateral movement lever, advancing and retracting the drive piston, and selectively combining the positions to operate the driven piston. Machine. 2. The Raschel knitting machine according to claim 1, wherein the protruding position of the drive piston is controlled by an electric signal output device. 3. The Raschel knitting machine according to claim 1, wherein the driven piston is returned to the original position after each lateral movement of the lever.