JPH03220337A - Opening-forming device of loom - Google Patents

Abstract

PURPOSE:To prepare the subject device enabling to simply and readily exchange needles or needle holders with preparatory needles or needle holders by separately unitizing needle-guiding members and the needle holders and fitting an insertion margin into an insertion space to assemble both the units in a separable state. CONSTITUTION:Many needle holders 1 are adjacently disposed on both the sides of a substrate 5 to form an insertion space 6, and many needle-guiding members 3 are also adjacently disposed on both the sides of an attaching plate 7 to form an insertion margin 8, thereby forming the units, respectively. The fitting of the insertion margin into the insertion space in a separable state in both the units permits to exchange the needle holder unit with a preparatory unit or to exchange only a needle with a preparatory needle by removing a fine fiber from the needle and subsequently pulling out the needle from the needle-guiding member.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in shedding forming devices for looms, particularly jacquard looms.

(Prior art) In a jacquard machine, a needle tied with warp threads is engaged with a knife that reciprocates in the vertical direction, and when the knife is raised, the needle is selectively locked with a needle holder. (Japanese Patent Application Laid-Open No. 61-225343, JP-A-59-199833, JP-A-62-62)
No. 945, Japanese Unexamined Patent Publication No. 59-26543).

The needle holder is assembled in a case that is integrated with a needle guide member that guides the vertical movement of the needle, and multiple sets of these together with needles and knives are connected to a board (a plurality of sets are mounted on the support member on the side of the Jacquard machine body). They are arranged in rows (attached in close rows).

(Problem to be Solved by the Invention) In such a conventional device, for example, when the needle or needle holder component requires replacement or repair due to wear or damage, the needle holder and the needle holder are replaced. Since the needle guide member has a one-piece structure, even if the board and needles are to be replaced, it is necessary to remove and connect a large number of needle threads, and if the board is replaced with the needle remaining. However, it is necessary to use a tool to align the remaining needles in preparation for assembly into the needle guide member, which is a very troublesome and difficult task in the limited space inside the Jacquard machine. The problem was that they were forced to.

(Means for Solving the Problems) In order to solve these problems, the present invention provides a needle guide member that slidably supports a needle that is engaged and pulled up when raised by a knife that reciprocates in the vertical direction. In addition, a needle holder that selectively locks the needle near the top dead center is constructed separately, and a number of needle holders are arranged on both sides of the substrate with a predetermined difference between the two holders facing each other with the substrate in between. A unit is created by arranging a large number of needle guide members adjacent to each other so as to form a space for insertion, and a unit is created by arranging a large number of needle guide members adjacent to each other on both sides of the mounting plate so that the upper part of each mounting portion remains as a predetermined insertion type. On the other hand, both units are assembled so that they can be separated by fitting the insertion space and the insertion type.

(Function) For example, if a component of the needle holder is damaged and needs to be replaced, the entire needle holder unit with the needle holder to be replaced may be replaced with a spare one, or the needle to be replaced may be replaced with a spare one. It becomes possible to remove the chisel from the cord, pull it out from the needle guide member, and replace it with a spare one.

(Example) In Figs. 1 to 6, 1 is a needle holder that selectively locks needles 2A and 2B near the top dead center; 3 is a needle 2A that is engaged with knives 4A and 4B and moves up and down; This is a needle guide member that supports 2B in a freely sliding manner, and these are constructed separately.

A large number of needle holders 1 are arranged adjacent to each other on both sides of a printed wiring board 5 so that a predetermined insertion space 6 is formed between both holders 1 facing each other with the board 5 in between. The needle guide member 3 is formed into a unit by arranging the needle guide member 3 adjacent to each other on both sides of the mounting plate 7 so that the upper part of the mounting plate 7 remains as a plug-in type 8. 9 and 10 indicate set screws of the needle holder 1, and 11 and 12 indicate set screws of the needle guide member 3.

The needle guide member units 13 are closely arranged in multiple rows on a supporting member (not shown) on the side of the Jacquard machine body, and the needle holder unit 14 fits the insert type 8 into the insert space 6. It can be assembled by

Inside the case 15 of each needle holder 1, there is a solenoid 16 whose polarity is reversed depending on the energization direction, an oscillating pendulum 17 that selectively oscillates and attracts the solenoid, and is operated by this oscillating pendulum 17. A pair of locking claws 18A and 18B are housed.

The solenoid 16 has a center and two side magnetic pole parts 16A and 16B.
, 16C, and when the current direction is switched, the central magnetic pole part 1
The polarities of 6A and the side magnetic pole parts 16B and 16C are reversed.

In the oscillating pendulum 17, the U-shaped branch portion 17A is connected to the central magnetic pole portion 16.
A and the side magnetic pole parts 16B and 16C are supported by the support shaft 19 so as to be able to freely swing between the branch part 17A and the side magnetic pole parts 16B and 16C.
The permanent magnet 20 attached to the base of the branch part 17A is magnetized so that one side of the branch part 17A becomes a north pole and the other becomes a south pole.

The other end of the oscillating pendulum 17 is extended as a drive rod 17D, and a pair of locking claws 18A and 18B are disposed to sandwich the drive rod 17D from both sides.

The locking claws 18A and 18B are each rotatably supported by a rotation shaft 18C, and the tip ends of the locking claws 18D engage with the locking holes (not shown) of the needles 2A and 2B, and the rear ends of the locking claws 18D connect to the drive rod 17D. The driven portion 18E is formed in contact with the driven portion 18E. 21 is the locking claw 18
A, 18B in the initial position, that is, the claw part 18D is in the needle 2A, 2
The spring shown in FIG.

Each needle guide member 3 is provided with a locking claw 18A of the needle holder 1.
, 18B are formed with guide grooves 3A extending straight in the vertical direction so as to guide the needles 2A, 2B toward the needles 2A, 2B.

Knives 4A and 4B that move up and down reciprocally are assembled on both sides of these needles 2A and 2B.
are provided with protrusions 22 that engage with the knives 4A and 4B, respectively. Note that a fine cord 23 (warp yarn) is tied to the lower ends of the needles 2A, 2B, and moves up and down (opening movement) together with the needles 2A, 2B.

The system is constructed as described above, and its operation will be explained next.

In the state shown in FIG. 1, the needles 2A are in each needle holder 20.

2B is not locked, for example, one knife 4
The needle 2A rises together with A, and the locking hole of the needle 2A reaches the position of the locking claw 6A near the top dead center.

However, if the solenoid 16 is not energized, the oscillating pendulum 1
7 is held in a neutral position by two springs 21, and each locking pawl 18A follows this.

The needle 18B is located at a position retracted from the reciprocating orbit of the needles 2A and 2B, and does not engage with the needle 2A. In this case, the needle 2A also descends as the knife 4A descends.

On the other hand, at a predetermined timing when the needle 2A reaches near the top dead center, the central magnetic pole part 16A is set to the S pole and the side magnetic pole parts 16B and 16C are set to the N pole in the solenoid 5 of the required needle holder 1. When energized, the U-shaped branch 17A connects the N and S poles.
The oscillating pendulum 17 magnetized to the poles rotates clockwise due to attraction and repulsion with these and is attracted to each magnetic pole branch.

As a result, one system pawl 1 is
8A rotates against the spring 21, and its claw portion 18D
protrudes onto the trajectory of the needle 2A and enters the locking hole. Next, when the knife 4A descends from the top dead center position, the needle 2A engages with the locking pawl 18A and remains at that position.
Only A descends.

After the needle 2A is thus engaged with the locking pawl 18A, the energization of the solenoid 16 is stopped. Since the tension of the needle 2A and the fine cord 23 is applied to the locking pawl 18A, the engaged state is maintained as it is even if the electricity supply is stopped.

When the direction of energization to the solenoid 16 is reversed at the same timing as above, the polarity of each magnetic pole section is reversed, and the central magnetic pole section 16
A becomes the north pole, and the side magnetic pole parts 16B and 16C become the south pole.

Therefore, the direction of attraction and repulsion of each branch portion 17A of the swinging pendulum 17 is reversed this time, and the pendulum 17 rotates counterclockwise to drive the locking pawl 18B in the protruding direction against the spring 21. As a result, the needle 2B moves to the locking claw 1 near the top dead center 11.
8B and is held in that position despite the descent of knife 4B.

When the knife 4B descends, the energization to the solenoid 16 is stopped, but the engagement with the locking pawl 18B continues due to the tension applied to the needle 2B as described above.

The engagement between the needles 2A, 2B and the locking claws 18A, 18B is released by stopping the energization to the solenoid 16 when the knives 4A, 4B rise to near the top dead center.
As the knives 4A and 4B rise, the needles 2A and 2 close to the top dead center.
When B is pulled up slightly, the locking claws 18A, 18B
Since the tensile force that was present is eliminated, the locking claw 1
8A.

18B retreats from the locking hole by the repulsive force of the spring 21,
The state shown in Figure 1 will be reached. Therefore, the unrestrained needle 2A
, 2B are lowered together with the lowering of the knives 4A, 4B.

On the other hand, in order to continue the engagement between the needles 2A, 2B and the locking claws 18A, 18B, when the knives 4A, 4B rise to near the top dead center, the solenoid 16 is energized from the corresponding direction, and the solenoid 16 is oscillated. Adsorb pendulum 4.

In this case, even if the load on the needles 2A and 2B is released, the locking claws 18A and 18B remain in the protruding position, so the needles 2A and 2B are still
Maintain engagement with A and 2B.

Therefore, even if the knives 4A, 4B descend, the needles 2A, 2
B remains, and even if the energization to the solenoid 16 is subsequently stopped, the needles 2A and 2B are held at the raised position in the same manner as described above.

As a result, if the movement of the solenoid 16 is controlled by a computer or the like according to a preset program, a predetermined opening is formed based on the movement of the fine cords 23 connected to the needles 2A and 2B. .

By the way, in this case, the needle guide member unit 13 and the needle holder unit 14 are assembled so that they can be separated, so if the needles 2A, 2B or the components of the needle holder 1 are damaged and need to be replaced, for example, they can be replaced. The needle holder unit 14 with the needle holder 1 to be replaced may be replaced with a spare one, or only the needles 2A and 2B to be replaced may be removed from the cord 23 and pulled upward from the needle guide member 3 to replace the needle holder unit 14 with a spare one. Therefore, the needles 2A, 2B, needle holder 1, etc. can be replaced in a short time by simple work without requiring any special tools or techniques.

(Effects of the Invention) In summary, according to the present invention, there is provided a needle guide member that freely slides and supports a needle that is engaged with and pulled up when raised by a knife that reciprocates in the vertical direction, and a needle that is selected near the top dead center. In addition to configuring a separate needle holder that locks the needle, a large number of needle holders are arranged adjacent to each other on both sides of the board so that a predetermined insertion space is formed between the two holders that face each other with the board in between. By arranging a large number of needle guide members adjacent to each other on both sides of the mounting plate so as to leave the upper part of the mounting part as a predetermined insertion allowance, it is possible to form a unit by connecting both units to the insertion space. Since the assembly is separable by fitting with the insertion allowance, an effect can be obtained in that the needle, needle holder, etc. can be easily and easily replaced without requiring any special tools or techniques.

[Brief explanation of drawings]

Figures 1 and 2 show an embodiment of the present invention; a partially cutaway front view and a side view show how the needle holder unit and needle guide member unit are assembled, and Figures 3 and 4 are the same. FIGS. 5 and 6 are partially cutaway front and side views of the needle holder unit, and FIGS. 5 and 6 are also partially cutaway front and side views of the needle guide member unit. DESCRIPTION OF SYMBOLS 1... Needle holder, 2A, 2B... Needle, 3... Needle guide member, 4A, 4B... Knife, 5... Substrate, 6...
...Plug-in space, 7...Mounting plate, 8...Plug-in allowance, 13
... Needle guide member unit, 14... Needle holder unit. Figure 3 Figure 3 Figure 3

Claims (1)

[Claims] 1. A needle guide member that freely slides and supports the needle that is engaged and pulled up when raised by a knife that reciprocates in the vertical direction, and a needle holder that selectively locks the needle near the top dead center are separate. In addition, a large number of needle holders are arranged adjacent to each other on both sides of the board so that a predetermined insertion space is formed between the two holders facing each other with the board in between, thereby forming a unit. While the components are arranged adjacent to each other on both sides of the mounting plate so that the upper part of the mounting part remains as a predetermined insertion allowance, it becomes a unit, while both units can be separated by fitting the insertion space and the insertion allowance. A loom shedding forming device characterized by being assembled.