JP2693240B2 - Loom opening forming device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement of an opening forming device of a loom, particularly a jacquard machine.

(Prior Art) In a Jacquard machine, a reciprocating knife is engaged with a needle that is tricked, and when the knife is raised, the needle is selectively engaged with the needle holder to open (open) ) Is formed.

The engagement of the needle with the needle holder when forming the opening often utilizes the attracting force of the electromagnet (see, for example, JP-A-61-2253).
43, JP 59-199833, JP 62-62945
JP, JP-A-59-26543, etc.).

(Problems to be solved by the invention) By the way, in all of these, the needle is smoothly engaged with the needle holder, and the attraction force of the electromagnet is reduced as much as possible. The needle is guided to be forced to bend toward the cage.

However, forcibly bending or rubbing in the process of moving the needle up and down to form the opening, especially in a high-speed loom, by repeating these movements at a very high speed continuously, This causes problems such as wear and damage of the components of the needle and the needle holder, and creates the cause of impairing the reliability of the opening forming device.

 The present invention aims to solve these problems.

(Means for Solving the Problem) Therefore, the present invention provides a solenoid that is energized in a reversible direction, a magnetized oscillating pendulum that is reversibly oscillated and adsorbed in response to energization of the solenoid, and an oscillating pendulum. A pair of locking claws that are rotated to the projecting position corresponding to the swinging direction of the, a spring that urges the locking claws to the retracted position, and a pair of locking claws that are arranged corresponding to the pair of locking claws. And a pair of knives that reciprocate reciprocally with each other and that engage with the needle and raise it when rising.

(Function) When the solenoid is energized from one direction in the vicinity of the top dead center of one knife, the swing pendulum swings in the corresponding direction, and one locking claw rotates to the protruding position to engage the needle. To do. After that, even if the knife descends and the energization is released, the tension applied to the needle keeps the needle engaged with the locking claw and held in the raised position.

When the solenoid is not energized (or energized in the opposite direction), the pawl is held in the retracted position by the spring, in which case the raised needle is lowered again with the knife.

When the other knife rises, the solenoid is energized in the opposite direction to swing the swinging pendulum to the opposite side, and the locking claw engages with the needle as described above. When the power is not supplied, the needle descends with the knife.

By controlling the energization and energization direction of the solenoid in this manner, the movement of the needle is controlled, and the opening (opening) is formed accordingly.

(Example) An example shown in FIGS. 1 to 3 will be described.

The needle holder 20 selectively holds the needles 2A and 2B at the top dead center position, and includes a solenoid 5 whose polarity is reversed according to the energizing direction and a magnetized magnet which selectively swings and attracts correspondingly. The swing pendulum 4 and a pair of locking claws 6A and 6B which are operated by the swing pendulum 4 are provided, and these are attached to the substrate 10 via the case 7.

A needle guide member 3 for slidingly guiding the needles 2A, 2B which are engaged with the knives 1A, 1B and move up and down is arranged below the needle holder 20.

The solenoid 5 of the needle holder 20 has a center and two side magnetic poles 5a, 5b and 5c, and the magnetism of the central magnetic pole 5a and the side magnetic poles 5b and 5c depends on the energizing direction of the solenoid 5. Inverted (in FIG. 2, the center is an S pole and both sides are N poles, and in FIG. 3, the center is an N pole and both sides are S poles).

The oscillating pendulum 4 is supported by a support shaft 4b such that a U-shaped branch portion 4a is swingable between a central magnetic pole portion 5a and side magnetic pole portions 5b, 5c, and at the base of the branch portion 4a. By the attached permanent magnet 4c, one of the branch portions 4a is magnetized so that one of them has an N pole and the other has an S pole.

The other end of the swing pendulum 4 is extended as a drive rod 4d, and a pair of locking claws 6A and 6B are arranged so as to sandwich the drive rod 4d from both sides.

The locking claws 6A and 6B are arranged so as to face each other, and are supported rotatably on the rotary shaft 6c, respectively, and
Claws 6a that engage with the locking holes 2a of the needles 2A and 2B are formed at the rotation tips of the A and 6B, while the other end of rotation is a driven portion 6b that contacts the drive rod 4d. Then, the locking claws 6A, 6
In B, the claw portion 6a is retracted by the spring 8, that is, the driven portion 6a.
The b is urged in the direction of coming into contact with the drive rod 4d.

In order to guide the needles 2A, 2B to the pair of locking claws 6A, 6B, the guide member 3 is formed with a pair of guide grooves 3a.
Guides the needles 2A and 2B straightly and freely in a vertical direction without bending them.

Knives 1A and 1B are arranged on both sides of the needles 2A and 2B, and the needles 2A and 2B have projections 2c that engage with the knives 1A and 1B, respectively.
Is provided.

In addition, tricks 2b are tied to the lower ends of the needles 2A and 2B,
By moving up and down together with the needles 2A and 2B, an opening (opening) is formed.

In this case, the pair of knives 1A and 1B move up and down reciprocally and synchronously.

By the way, this figure shows a part of the loom for convenience of explanation, and in reality, the needle holder 20, the needles 2A, 2B, the knives 1A, 1B, etc. are set as one set, and a large number of sets are arranged in parallel. .

It is configured as described above, and the operation will be described below.

FIG. 1 shows a case in which the needles 2A and 2B are not engaged with the needle holder 20, and the needle 2A rises together with the knife 1A, and the locking hole 2a of the needle 2A has a locking claw near the top dead center thereof. Come to the 6A position. However, if the solenoid 5 is not energized,
The springs 8 hold the neutral position, and the respective locking claws 6A, 6B that follow the springs 8 are at positions retracted from the reciprocating track of the needles 2A, 2B and do not engage with the needles 2A.
The needle 2A also descends as 1A descends.

On the other hand, as shown in FIG. 2, the solenoid 5 is energized from a predetermined direction at a predetermined timing when the needle 2A arrives near the top dead center, and the central magnetic pole portion 5a is the S pole and the side magnetic pole portion 5b. ,Five
When c is made to be the N pole, the vibrating pendulum 4 in which the U-shaped branch portion 4a is magnetized to the N pole and the S pole is rotated in the clockwise direction by the attraction and repulsion action of these. It is attracted to the magnetic pole.

As a result, one locking claw 6A rotates through the drive rod 4d against the spring 8, and the claw portion 6a projects on the track of the needle 2A and projects into the locking hole 2a. It should be noted that when the locking claws 6A, 6B are inserted, they are surely engaged with the needles 2A, 2B, and when retracted, the needles 2A, 2B.
It is set in advance to maintain a predetermined interval so as not to interfere with 2B.

The locking claw 6B on the opposite side is pushed by the spring 8 and held in the retracted position.

Next, when the knife 1A descends from the top dead center position, the needle
2A engages the locking pawl 6A and stays in that position, knife 1A
Only descend.

After the needle 2A is thus engaged with the locking claw 6A, the energization of the solenoid 5 is stopped. Needle 2A and special measures for locking claw 6A
Since the tension of 2b is applied, even if the energization is stopped, the engaged state is maintained as it is as shown in the figure.

FIG. 3 shows a state in which the needle 2B on the opposite side is engaged with the locking claw 6B.

By reversing the energization direction to the solenoid 5, the polarity of each magnetic pole part is reversed, and the central magnetic pole part 5a is the N pole,
The side magnetic pole portions 5b and 5c become S poles.

Therefore, this time, the suction and repulsion directions of the respective branch portions 4a of the swing pendulum 4 are reversed, and the pendulum 4 rotates counterclockwise to drive the locking claw 6B against the spring 8 in the protruding direction. .
As a result, the needle 2B engages with the locking claw 6B near the top dead center, and is held at that position despite the lowering of the knife 1B. When the knife 1B descends, the energization of the solenoid 5 is stopped, but the engagement with the locking claw 6B continues due to the tension applied to the needle 2B as described above.

The needle 2A in FIG. 3 shows just this state, and the engagement with the locking claw 6A is maintained even when the knife 1A descends.

The engagement between the needles 2A, 2B and the engaging claws 6A, 6B is released by the knife 1A, 1
This is done by stopping the power supply to the solenoid 5 when B rises to near the top dead center. When the needles 2A and 2B are slightly pulled up near the top dead center due to the rise of the knives 1A and 1B, the pulling force applied to the locking claws 6A and 6B is released, so that the locking claws 6A and 6B move to the spring 8 Repulsive force of locking hole 2
It retreats from a and the state shown in FIG. Therefore, the released needles 2A and 2B move down together with the lowering of the knives 1A and 1B.

On the other hand, in order to continue the engagement between the needles 2A, 2B and the locking claws 6A, 6B, when the knives 1A, 1B are raised to the vicinity of the top dead center, electricity is applied from the direction corresponding to the solenoid 5 and the vibration pendulum is generated. Adsorb 4 In this case, even if the load on the needles 2A, 2B is released, the engagement with the needles 2A, 2B is still maintained because the locking claws 6A, 6B are in the protruding position.

Therefore, even if the knives 1A and 1B descend, the needles 2A and 2B remain,
Even if the energization of the solenoid 5 is stopped after this, the needles 2A and 2B are held in the raised position similarly to the above.

As a result, if the movement of the solenoid 5 is controlled by a computer or the like according to a preset program, a predetermined opening (opening) is formed based on the movement of the detailed measure 2b connected to the needles 2A and 2B. .

By the way, during these series of movements, the needles 2A and 2B only repeat up and down movements along the guide groove 3a of the guide member 3 and are not forcibly bent or rubbed in the direction of the electromagnet unlike the conventional case. Therefore, the problems of wear and damage of the needles 2A and 2B are significantly reduced even at high speed operation.

In addition, one solenoid 5 and vibration pendulum 4
Since the two locking claws 6A and 6B can be selectively operated to independently control the movements of the needles 2A and 2B, it is possible to form a highly precise and dense opening.

Further, since the printed wiring is provided on the substrate 10 and the needle holder 20 is attached thereto, the attachment / detachment to / from the substrate 10 can be easily performed.
The needle holder 20 can be removed and replaced.

(Effects of the Invention) As described above, according to the present invention, bending and rubbing force do not act on the needle during its reciprocating motion, so that there is little wear and damage, and durability and reliability are significantly improved. can do.

Further, the two needles can be controlled independently of each other by one solenoid and the vibrating pendulum, so that it is possible to form a more dense and highly flexible opening.

[Brief description of the drawings]

FIG. 1 is a front view of essential parts of an embodiment of the present invention, and FIGS. 2 and 3 are front views showing operating states. 1A, 1B ... Knife, 2A, 2B ... Needle, 3 ... Guide member, 3a ...
… Guide groove, 4… Swing pendulum, 5… Solenoid, 6A, 6B
…… Locking claws, 8 …… Springs, 10 …… Boards, 20 …… Needle holders.

Claims (1)

(57) [Claims] 1. A solenoid that is energized in a reversible direction, a magnetized oscillating pendulum that is reversibly oscillated and attracted in response to energization of the solenoid, and a protrusion that corresponds to the oscillating direction of the oscillating pendulum. A pair of locking claws that are rotated to a position, a spring that urges the locking claws to the retracted position, and a pair of needles that are arranged corresponding to these pair of locking claws are slidably guided. An opening forming device for a loom, comprising: a guide member and a pair of knives that reciprocate reciprocally with each other and engage with a needle to raise the needle when the needle rises.