JPH0339502Y2 - - Google Patents

Description

[Detailed explanation of the idea] "Industrial application field" The present invention relates to a needle selection device for a hand knitting machine.

``Prior Art'' As a conventional needle selection device for a hand knitting machine, the following one is well known, for example.

Depending on whether the protrusion of the touch lever enters the hole of the punch card, which is a pattern card, or is blocked by the part without a hole, whether or not the touch lever rotates is controlled, and accordingly, the needle selection is performed. A purely mechanical so-called drum needle selection type in which needle selection pieces mounted radially on a drum are switched between two positions by a touch lever, and knitting needles are selected back and forth by the needle selection pieces.

A needle selection member magnetized by a solenoid is installed on the back of the carriage, and the magnetic force of the needle selection member is directly applied to the butt of knitting needles one by one to select needles.

``Problem to be solved by the invention'' In the conventional drum needle selection type mentioned above, the needle selection piece is actuated via a touch lever, so the pattern cards that can be used are punch cards that express patterns by the presence or absence of holes. However, the number of knitting units is limited depending on the width of the punched card.

In addition, the magnetic direct action needle selection type does not have this drawback, but there is a limit to the speed at which it can select needles.
If the carriage speed increases, needle selection will be defective, and if a solenoid with good response is used to avoid this problem, it has the disadvantage of being extremely expensive.

In view of these conventional drawbacks, the present invention aims to increase the needle selection speed by using an ordinary solenoid.

``Means for Solving the Problems'' Therefore, the present invention provides a drum needle selection type with a response piece that corresponds to the needle selection piece in a one-to-one relationship.
At least a part of the needle selection drum has a predetermined number of steps in its axial direction, and is displaceably mounted so that the steps are repeated in the circumferential direction, and the operation is individually operated by a solenoid. In order to transmit the operating force to the needle selection piece via the reaction piece, the same number of plates as the number of steps of the reaction piece are arranged corresponding to the steps.

"Operation" According to this configuration, a large number of needle selection pieces correspond to the same solenoid and actuating piece at intervals equal to the number of stages of the response piece, and each solenoid selects a large number of needle selection pieces at intervals of the number of stages of the response piece. Switching operation is performed via the actuation plate and response piece.

"Embodiment" An embodiment of the present invention will be described below in detail based on the drawings.

As shown in FIGS. 1 to 3, the entire needle selection device is mounted on a carriage 1, and its needle selection drum 2
is rotatably supported on a support shaft 3 and obliquely mounted on the carriage base plate 3 by a mounting plate 4. In this needle selection drum 2, a large number of needle selection pieces 5 are installed in grooves so as to be able to switch and rotate radially and individually at regular intervals as in the conventional case, and the needle selection protrusions 6 are , protrudes from the lower end peripheral edge of the outer peripheral surface of the needle selection drum 2.

A driven gear 7 is provided around the lower end of the needle selection drum 2, and the driven gear 7 meshes with a speed controlling gear 8 rotatably supported on the carriage base plate 3.
Since the regulating gear 8 is integrated with a pinion 10 that meshes with a rack 9 provided on the vertical rear wall of the needle bed 8, the needle selection drum 2 rotates when the carriage 1 travels.

As shown in FIGS. 3 to 5, the needle selection drum 2 also has the same number of responsive pieces 11 that correspond to the needle selection pieces 5 in a one-to-one relationship. is also mounted in the groove so as to be slidable in the radial direction.

Each of the responsive pieces 11 individually has an engaging protrusion 12 that protrudes from the outer peripheral surface of the needle selection drum 2, but the protruding height of each engaging protrusion 12 is 4 in the illustrated example.
Each needle is different in four stages, and this is repeated at four intervals in the circumferential direction of the needle selection drum 2. Also,
Each response piece 11 has a recess 14 on its lower edge that fits into the convex part 13 at the upper end of each needle selection piece 5, and has two positioning recesses 15 on its upper edge. Each response piece 11 is connected to a plate spring 17 via a ball 16 that engages with its positioning recess 15.
It is pressed downward by the needle selection drum 2, and can be slid in two positions, front and rear, relative to the needle selection drum 2.
When the responsive piece 11 is switched and slid back and forth in this manner, the corresponding needle selection piece 5 is switched and rotated up and down by the responsive piece 11. The leaf spring 17 is attached to the upper surface of the needle selection drum 2 and covered with an upper lid 18.

On the other hand, four solenoids 20 and the same number of operating plates 21 are attached to the frame 19 which is extended and fixed from the carriage base plate 3 as follows.

That is, the four solenoids 20 are connected to the frame 1.
9 are fixed side by side on the left and right, and four actuating plates 2
1 is fitted into the front and rear guide frame pieces 22 in a tilted manner so as to be slidable back and forth and in a hierarchical manner corresponding to the step of the engagement protrusion 12 of the response piece 11. and,
The plungers 22 of these four solenoids 20 and the four actuating plates 21 are individually arranged in one-to-one correspondence by four cranks 24 rotatably supported on a common shaft 23. is connected to.
As shown in FIG. 6, each operating plate 21 has one short slit 26 that engages with the free end 25 of the corresponding crank 24, and the free ends 25 of the other three cranks 24 are inserted therethrough. 3 long slits 27
The movement of each crank 24 is transmitted only to the corresponding one of the actuating plates 21. A return spring 28 is hung on the base end of each actuating plate 21, and the distal edges of the four actuating plates 21 can be engaged with the engaging protrusions 12 of each stage of the response piece 11 in a one-to-one relationship. , usually facing it at its closest position.

Therefore, the four solenoids 20 are connected to the response piece 11.
The solenoid 20 corresponds one-to-one to each stage of the four stages of engagement protrusions 12, and when a certain solenoid 20 is energized, the crank 24 connected to the plunger 22 moves to the first solenoid. It is rotated as shown by the chain line in the figure, and the corresponding actuating plate 21 is advanced toward the needle selection drum 2, that is, to the position where it engages with the engaging protrusion 12 of the corresponding stage of the responsive piece 11. As the needle selection drum 2 rotates, the engagement protrusion 12 of that stage
When engaged with the advanced actuating plate 11, the response piece 11 protruding from the engaging protrusion 12 is slid backward inward of the needle selection drum 2 as shown by the chain line in FIG. The needle piece 5 is rotated so that its needle selection protrusion 6 is displaced from the lower position to the upper position.
The responsive piece 11 is held in the retracted position by the ball 16, and therefore the needle selection piece 5 is also held in the upper position, and in this state, the needle selection piece 5 moves to the needle selection position as the needle selection drum 2 rotates. and will be forwarded.

On the other hand, for the solenoid 20 that is not energized, the crank 24 is not rotated, so the actuating plate 21 of the corresponding stage does not engage with the engagement protrusion 12 of the response piece 11. The needle selection piece 5 corresponding to the needle selection piece 5 is sent to the needle selection position with its needle selection protrusion 6 positioned downward.

In this way, the large number of needle selection pieces 5 mounted radially on the needle selection drum 2 are shared by the four solenoids 20, and each solenoid 20 is displaced every fourth depending on whether it is turned on or off. -In order to receive non-displacement control, each solenoid 20
The needle selection drum 2 may be responsive enough to be switched on and off while the rotational speed of the needle selection drum 2 is being forwarded by the pitch of four needle selection pieces 5.

The needle selection piece 5, which has been rotated to the upper position as described above by the response piece 11, is sent to the needle selection position and then rotated by the return cam 29 to rotate the needle selection drum 2 in the same manner as before. Along with this, the response piece 11 is mechanically rotated back to the lower position, and the response piece 11 is also manually slid back outward.

The on/off control of the four solenoids 20 is performed by the CPU 30, ROM 31, and RAM as shown in Figure 7.
32, an I/O port 33, and the like. In addition to the solenoid 20, the I/O port 33 has four cams 34 disposed on each of the left and right ends of the rack 9 (FIG. 3) of the needle bed 8, which rotate together with the pinion 10.
a carriage clock pulse generator 37 which optically scans the linear encoder 36 on the lower side of the rack 9 as the carriage 1 travels to generate carriage clock pulses;
A scanning member 38 that optically scans a pattern card (not shown) and reads it as a digital electric signal in a known manner, a scanning member drive motor 39 that linearly drives the scanning member 38, a card drive motor 40 that transports the pattern card, etc. is connected.

By the way, this hand knitting machine does not have a dedicated sampling pulse generator for sampling electrical signals as the sending member 38 scans, but sampling is also performed using the carriage clock pulses of the carriage clock pulse generator 37. It's getting old. When the carriage 1 travels and a carriage clock pulse is generated, the scanning member drive motor 39 operates, the scanning member 38 scans the pattern card, and the electrical signal is sampled according to the carriage clock pulse and stored in the RAM 32. be done.

FIG. 8 shows the flow of on/off control of the solenoid 20 based on the input of pattern data and its output. In the figure, after initialization is performed in step 100, data is inputted to the four switches 35 on the left or right side in step 101. Here, data input to the switch 35 is performed because the response piece 11 of the needle selection drum 2 is
Since the needle selection drum 2 is arranged in tiers, the needle bed 8
After exiting from the range where the needle grooves are arranged, when re-entering the range, the operation timing of the four stages of actuation plates 21 operated as described above by the four solenoids 20 and the response of the corresponding stage. This is to prevent the possibility that the phase of the piece 11 may shift.
Thereafter, in step 102, it is determined whether the carriage 1 has advanced by one pitch or not, depending on whether a pulse is output from the carriage clock pulse generator 37. If it has advanced, in step 103, the scanning member 38 is Pattern data is input by scanning. Next, in step 104, it is determined whether or not the data relates to needle selection. If the data is needle selection data, the process proceeds to step 105, where the corresponding solenoid 20 is turned on, and then the process proceeds to step 10.
6, the solenoid 20 is turned off. After this,
At step 107, it is determined whether or not one line (one formation stage) of data has ended, depending on whether or not the rising direction of the carriage clock pulse has been reversed. When the data has ended, the process returns to step 101. When the direction of travel of the carriage 1 is reversed, the scanning member drive motor 39 is also reversed.

In addition, although the needle selection piece 5 and the response piece 11 are separated in the above embodiment, they may be provided integrally.

``Effects of the invention'' The present invention divides a large number of needle selection pieces by the same number of solenoids as the number of stages of response pieces attached to the needle selection drum, and switches them via the response pieces and the actuating plate. Therefore, each solenoid switches a large number of needle selection pieces at intervals of the number of stages of the response piece, and can accurately switch a large number of needle selection pieces without using expensive quick-response solenoids. can.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a perspective view, Fig. 2 is a plan view, Fig. 3 is a sectional view, Fig. 4 is a partially cutaway enlarged side view, and Fig. 5 is a plan view of the same. , FIG. 6 is an enlarged perspective view showing the relationship between the actuating plate and the crank, FIG. 7 is a block diagram, and FIG. 8 is a flow chart. 1... Carriage, 2... Needle selection drum, 5... Needle selection piece, 11... Response piece, 20... Solenoid, 2
1... Operating plate.

Claims (1)

[Claims for Utility Model Registration] 1. A large number of needle selection pieces for selecting knitting needles in two predetermined positions in front and back as the drum rotates are attached to a needle selection drum rotatably supported on a carriage. In a needle selection device for a hand knitting machine that is mounted radially at predetermined intervals in the circumferential direction, response pieces corresponding to the needle selection pieces in a one-to-one relationship are mounted on the needle selection drum at least in the axial direction thereof. The actuating plates are arranged so that some of them are arranged in a stepped manner with a predetermined number of steps, and are displaceable so that the steps are repeated in the circumferential direction, and are actuated individually by solenoids.
A needle selection device for a hand knitting machine, characterized in that the same number of response pieces as the number of stages of the response pieces are arranged corresponding to the step difference in order to transmit operating force to the needle selection pieces via the response pieces. 2. The needle selection device for a hand knitting machine according to claim 1, wherein the response piece is separated from the needle selection piece and is mounted so as to be displaceable in the radial direction of the rotating drum.