JPH0252021B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an improvement in a passive double-acting dobby machine that moves a heald frame up and down by engaging or not engaging a pair of hooks and a knife.

<Prior Art> A conventional example of this type of dobby machine is disclosed in Japanese Patent Application Laid-open No. 112532/1983.

This dobby machine used a peg as a reading device, and the selection lever was controlled by pressing the selection lever with the peg. That is, when the peg is in contact with the selection lever, the selection lever tilts and presses the knife toward the hook, causing them to engage. Further, when the peg does not come into contact with the selection lever, the tension coil spring acts to tilt the selection lever to the opposite side. This keeps the knife and hook out of engagement.

When the knife and the hook engage, the heald frame is pulled; when the knife and the hook do not engage, the heald frame is not pulled.

<Problems to be Solved by the Invention> In the dobby machine having the above configuration, the selection lever must be pressed with the peg while the hook and knife are engaged.

Therefore, the reading device must be operated for a certain period of time, which has been an obstacle to increasing the speed of the device.

Further, when reversing the dobby machine, special equipment was required, such as rewinding the peg.

<Means for Solving the Problems> This invention is a dobby machine made for the purpose of solving the above problems, and is controlled by a swinging lever that allows the hook and knife to be relatively close to each other and a reading device that is programmed. a selection hook supported on both ends of the swing lever, or a selection hook supported on both ends of the swing lever.
In a dobby machine that is configured to take two stable positions, when the selection hook is in the stable position, the holding member that engages and holds the selection hook is pivotably mounted, and the holding member is moved in the engaging direction or in the disengaged direction. It is characterized in that a spring that biases in the mating direction is applied to the holding member.

<Operations and Effects of the Invention> According to the dobby machine configured as described above, the selection hook that acts on either the hook or the knife in order to engage the hook and the knife can be controlled in a short time. Therefore, it is possible to cope with high-speed operation of the dobby machine.

Also, the position of the selection hook given by the reading device is held by the holding means. The position of the selection hook is thus maintained even after the short-term action applied by the reading device to the selection hook has ended. Therefore, the Dobby machine can be reversed without being constrained by timing.

<Example> Hereinafter, this invention will be explained in more detail by way of an example.

Figure 1 shows the jack lever 1 connected to the heald frame.
This is a schematic diagram of a dobby machine that pulls up a heald frame by swinging the heald frame at a predetermined timing.Two connecting hooks 3a and 3b are linked to the tip of a jack lever 1 via a parallel rod 2. Two connecting knives 4a and 4b facing the connecting hooks 3a and 3b are pivotally attached to swing shafts 6a and 6b that swing around a virtual axis 5, and are supported by coil springs 7a and 7b, respectively. connected to the frame by.

Note that the tensile strength of the coil springs 7a and 7b is stronger than that of the coil spring 11 described later.

Further, the hook portions of the connecting knives 4a and 4b are connected to connecting hooks 3a and 3 facing outward, respectively.
b. 8a and 8b are shafts 9a
and 9b, and are swingably disposed so that their respective tips come into contact with the inner rear parts of the connecting knives 4a and 4b, and the rear parts of the selection hooks 8a and 8b are connected to coil springs 11. They are mutually urged inwardly and connected. 12a and 12
b is a stopper in contact with the rear inner side of the selection hooks 8a, 8b.

When the selection hooks 8a and 8b come into contact with the connecting knives 4a and 4b, respectively, they are rotated in the direction of stretching the coil spring 11 as shown in the figure (tensile strength of the spring; spring 11<spring 7a, 7b), and one Take a stable position (first stable position). Further, the selection hooks 8a and 8b are connected to the connecting knives 4a and 4b, respectively.
When the coil spring 11 does not abut against the stoppers 12a and 12b, the coil spring 11 causes the rear part thereof to abut against the stoppers 12a and 12b, and assumes the other stable position (second stable position).

A cam 15 is pivotally mounted on the cam shaft 17 and driven to rotate at a speed synchronized with the rotational swing of the virtual shaft 5, and a circumferential cam groove 15a is formed on the upper surface of the cam.
A concave portion and a convex portion are formed in the cam groove 15a at positions of 180 degrees. This cam groove 15a has a cam roller 1
The swing shaft 14 of the pusher 10 is engaged through the cam 15, and the pusher 10 swings its tip in synchronization with the rotation of the cam 15, and pushes the selection hooks 8a and 8b on both sides with the projection on the tip. Selection hooks 8a and 8b are arranged to push and rotate the rear portions of the connecting knives 4a and 4b at a certain timing.

Further, reference numeral 18 denotes a holding member pivotably mounted on the shaft 19, and includes a stepped portion 100 that engages and holds the two selection hooks 8a and 8b at the first stable position described above. This engagement is performed elastically by the action of springs 7a and 7b. The coil spring 20 is the holding member 18
The selection hooks 8a, 8b are biased in the direction of disengaging the stepped portion 100 from each other. A solenoid 21 that pushes the holding member 18 in the engagement direction is disposed on the back surface of the holding member 18, and the pushing operation of the plunger of the solenoid 21 causes the holding member 18 to restrain the movement of the two selection hooks 8a and 8b, and finally The connecting knives 4a, 4b are connected to the connecting hooks 3a, 3b.
act to disengage from the

Since the holding member 18 is stabilized when the stepped portion 100 and the selection hooks 8a, 8b are engaged, the solenoid 21 only needs to be operated for a short time by the reading device.

In the heald frame lifting mechanism having such a configuration, when one dobby machine is equipped with, for example, 16 heald frames, 16 sets are installed for each heald frame,
Each of the 16 solenoids 21 is controlled by a reading device described later.

FIG. 2 is a block diagram showing the configuration of the reading device. Reference numeral 30 is a central processing unit composed of a microprocessor or the like, and the memory 3 is programmed based on a predetermined program stored in a fixed memory 31.
The weaving pattern pattern information stored in 2 is sequentially read out, and drive control is executed for each of the 16 solenoids 21 to operate so as to weave a predetermined weaving pattern. 33 is a proximity switch arranged to correspond to the main shaft of the dobby machine, detect the rotation angle within one rotation, and send the timing signal to the timing detection circuit 37; It is a rotary encoder that outputs a timing signal synchronized with the rotation of the dobby machine to the detection circuit 37, and both are used to extract a timing signal synchronized with the rotation of the dobby machine.
The proximity switch 33 detects the timing from the beginning of rotation of the dobby machine until its main shaft passes the origin, and the rotary encoder 34 detects the timing of the dobby machine after passing the origin. A timing signal from the timing detection circuit 37 is connected to be sent to the central processing unit 30. 3
5 is the operating switch for the dobby machine, which includes a forward/reverse rotation switch, a leveling switch, a plain weave switch,
and a manual switch, etc., and are connected to transmit or output signals to the central processing unit via an I/O interface 38 along with an instruction display lamp 36 that lights up to indicate the operation of the 16 solenoids 21, Placed on the control panel. 39 is an I/O driver connected to the output side of the central processing unit 30 for driving the solenoid, and the buffer circuit 4
0 individual drive outputs via 16 solenoids 2
1, respectively.

On the other hand, 41 is a program loader that creates pattern information based on the weaving pattern and transfers this pattern information to the reading device installed in each dobby machine. This program loader 41 includes a central processing unit 42 consisting of a microprocessor or the like;
Fixed memory 43 and memory 4 for program memory
4, and an operation panel 46 on which are arranged a data switch for inputting pattern information programs, 16 key switches, step switches for inputting signals for each step, and the like. The pattern information program created here is temporarily stored in the memory 4.
When operating the dobby machine, the program loader 41 is connected to the control section of each dobby machine via interfaces 47 and 48, and the program is transferred to the memory 32 of each dobby machine.

Next, the operation of the reading device of the Dobby machine will be explained. As described above, the dobby machine starts operating with the pattern information program created in advance transferred and stored in the memory of the control unit arranged for each dobby machine. When the dobby machine is started and its main shaft rotates, timing signals are sent from the upper and lower proximity switches 33 to the central processing unit 30 via the timing detection circuit 37 until the rotary encoder 34 passes through its preset origin. entered,
Based on this timing signal, the central processing unit 30
Now read the pattern information from the memory 32,
A drive signal is sent to the I/O driver 39 to drive each of the 16 solenoids 21 based on the pattern information. This operation of the central processing unit is performed in the same way based on the timing signal from the rotary encoder 34 even after the main shaft of the dobby machine passes the origin, and the operation of the central processing unit is continued in the same way based on the timing signal from the rotary encoder 34. I'm going to weave it.

Meanwhile, at this time, the heald frame pulling mechanism operates as follows. In the timing chart of FIG. 3, line A shows the movement of the upper connecting knife 4a, and line B shows the movement of the lower connecting knife 4b (actually, it is a sine curve or a deformed trapezoidal curve, but the curved part is abbreviated and drawn as a straight line). Furthermore, C
The line indicates the upward tilting movement of the pusher 10, the D line indicates the downward tilting movement, and E indicates the movement of the solenoid 2.
1 shows a protruding motion. Further, on line A, point A1 is the point where the connecting knife 4a advances to the right and the engagement surfaces with the connecting hook 3a match, and point A2 is the point where the connecting knife 4a advances to the most advanced position and then moves to the left. This is the point at which the engagement surfaces with the connecting hook 3a match again after the knife 4a retreats, and a gap is created between the connecting knife 4a and the connecting hook 3a between A1 and A2. Also in line B, the relationship between the lower connecting knife 4b and the connecting hook 3b is the same between B1 and B2.

Therefore, when the connecting knife 4a reaches point A1, the pusher 10 rotates upward, and the connecting knife 4
When there is a gap between the selection hook 8a and the connecting hook 3a, the selection hook 8a is pushed upward and returned to its original position. Here, since the connecting knife 4a is normally urged to rotate upward by the coil spring 7a, the upper part of the hole 22 provided on the left side of the connecting knife 4a is connected to the stopper inserted therein. 2
3, the connecting knife 4a contacts the connecting hook 3a.
It is in a position where it can be engaged with. And select hook 8
a hits the connecting knife 4a and pushes it up, the connecting knife 4a is rotated clockwise and the connecting hook 3a is rotated.
It will leave the engaged position.

In a device that performs such movements, when the pusher 10 is rotated up and down, the holding member 18 is moved between the selection hooks 8a and 8b by the operation of the solenoid 21.
Depending on whether or not they are engaged and held, the connecting knives 4a, 4b and the connecting hooks 3a, 3b engage or are disengaged, and the jack lever 1 operates to pull up the heald frame. .

First, the solenoid 21 is activated, and the holding member 18
A case will be explained in which the selection hooks 8a and 8b are engaged.

(1) The connecting knife 4a moves forward to the right, and the engaging surface of the connecting knife 4a matches the engaging surface of the connecting hook 3a.

(2) The protrusion of the cam groove 15a of the cam 15 acts on the cam roller to rotate the pusher 10 upward, thereby rotating the selection hook 8a upward.

(3) The tip of the selection hook 8a hits the lower rear end of the connection knife 4a, and the connection knife 4a is rotated clockwise, and the engagement position between the connection knife 4a and the connection hook 3a is released.

(4) The holding member 18 is pushed by the solenoid 21, tilts to the right, engages the selection hooks 8a and 8b, and becomes stationary.

(5) When the pusher 10 returns to its original horizontal position, the solenoid 21 returns with a slight delay, but the holding member 18 and selection hook 8a remain engaged. Therefore, since the selection hook 8a is in the state of pushing the connecting knife 4a, the connecting knife 4a retreats to the left without engaging with the connecting hook 3a.

(6) Then, the pusher 10 again selects the selection hook 8a.
The connecting knife 4a repeats the above operation until the solenoid 21 becomes inactive when .

Next, the solenoid 21 does not operate and the holding member 1
8 does not engage with the selection hooks 8a and 8b.

(1) The connecting knife 4a moves forward to the right, and the engaging surface of the connecting knife 4a matches the engaging surface of the connecting hook 3a.

(2) As the cam 15 rotates, the convex portion of the cam groove 15a acts on the cam roller 16, causing the pusher 10 to rotate upward, thereby rotating the selection hook 8a upward.

(3) The tip of the selection hook 8a hits the lower rear end of the connecting knife 4a, and the connecting knife 4a is rotated clockwise.

(4) When the pusher 10 returns to the horizontal position, the selection hook 8a rotates downward, but remains stationary in a slightly upward direction due to the action of the coil spring 11.

(5) On the other hand, the connecting knife 4a is returned to the horizontal position by the action of the coil spring 7a, but at this time, the tip of the selection hook 8a is
Since the force of the coil spring 7a is stronger than that of the coil spring 11, the connection knife 4a acts to push down the tip of the selection hook 8a, and the connection knife 4a presses down the tip of the selection hook 3a. into the engaged position. And Pushya 1
0 moves from C3 to C4 along line C in FIG. . Note that the engagement state between the connecting knife 4a and the connecting hook 3a is once released when the pusher 10 pushes up the selection hook 8a again, but the solenoid 21
If the push-out operation is not performed, the engaged state will be established again.

In this way, the operating state of the jack lever 1 is controlled by the operation of the solenoid 21, and the heald frame is raised or lowered, but the lower connecting knife 4b
The engagement and disengagement of the connecting hook 3b and the coupling hook 3b are similarly operated and controlled by the operation of the solenoid 21.

Further, when the dobby machine reverses, the same operation is performed. Here, the selection hook 8a,
The first stable position of 8b is maintained by the resilient engagement of the retaining member 18 thereto until further action of the solenoid is applied. Similarly, the second stable position of the selection hooks 8a and 8b is also held by the coil spring 11.
is maintained until the next action of the solenoid is applied. Therefore, there is no particular restriction on the timing of reversal.

In the above embodiment, when the solenoid 21 is pushed out, the connecting knives 4a, 4b are disengaged from the connecting hooks 3a, 3b, and the jack lever 1 is controlled not to operate. Alternatively, the heald frame can be raised or lowered via the jack lever by engaging the connecting knife and the hook when the solenoid is actuated.

Furthermore, by arranging the connecting hook inside the connecting knife, the connecting hook can be the member that receives the command of the selection hook.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a schematic diagram of a dobby machine, FIG. 2 is a block diagram of a reading device, and FIG. 3 is a timing chart showing the operation of a connecting knife, pusher, and solenoid. 3a, 3b...Connection hook (hook), 4a, 4
b... Connection knife (knife), 8a, 8b... Selection hook, 10... Pusher, 18... Holding member.

Claims (1)

[Scope of Claims] 1. A swinging lever L that relatively closes and separates the hooks 3a, 3b and the knives 4a, 4b, and a selection hook 8 controlled by a programmed reading device.
a, 8b, and the selection hooks 8a, 8b take two stable positions with respect to the hooks 3a, 3b or the knives 4a, 4b supported on both ends of the swing lever L. In the dobby machine, when the selection hooks 8a, 8b are in a stable position, a holding member 18 that engages and holds the selection hooks 8a, 8b is pivotably mounted, and the holding member 18
A dobby machine characterized in that a spring is applied to the holding member 18 for biasing the holding member 18 in an engaging direction or a disengaging direction.