JPH08302536A - Device for selecting warp - Google Patents

Abstract

PURPOSE: To provide the subject device capable of changing only the lift amount of a warp without correcting the lift position of the warp, by moving the connection points of links to arms along circles corresponding to the moving radii of the arms, respectively. CONSTITUTION: An eccentric arm 32 is connected to a first link 33 movably supported on a support point 53 through a link pin 51, and an arm 36 is also linked to the first link 33 through a link pin 61. The arm 36 is connected to a second link. The links 51 and 61 are penetrated through long holes 60 and 66, respectively, and the central lines of the long holes are coincident with the loci of the radii R1 , R2 of the arms. Thus, only the lift amount of the warp can be changed by changing the distances of the link pines 51, 61 from the support 53 without changing the relation of the lift position of a needle driven with a knife with the position of a hook driven with a solenoid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a warp selection device such as a jacquard machine used in a loom.

[0002]

2. Description of the Related Art The formation of a woven pattern in a loom is performed, for example, by forming an opening in a warp and letting a weft pass through the opening. The opening is formed in the warp by pulling up the warp. For this reason, a warp selection device such as a jacquard machine that selects and pulls up a specific warp from a large number of warps according to the weave pattern is provided above the loom body.

The warp selection device is driven integrally with the loom body 3 by a link mechanism shown in FIGS. 3 and 4, for example. That is, the rotation of the main shaft 30 of the main body of the loom shown in FIG. 3 is transmitted to the eccentric arm 32 of the jacquard machine 2 shown in FIG. 4 via the cardan shaft 31 and the shaft 34 to drive the eccentric arm 32 up and down.

In the jacquard machine 2, the vertical movement of the eccentric arm 32 drives the bars 37 and 38 up and down integrally via the link pin 51, the first link 33, the arm 36 and the second link 35. Connecting members 3 on the bars 37 and 38
Numerous knives 7A are connected via 9 and bars 37 and 3
Move up and down together with 8.

In order to move the knife 7B up and down, another set of link mechanisms of the same construction is provided in parallel with these link mechanisms. This link mechanism is configured in the same manner as the above-described link mechanism, but is configured so that only the eccentric position of the eccentric arm differs by 180 degrees and the knives 7A and 7B are alternately moved up and down according to the rotation of the shaft 34.

The individual knives 7A and 7B push up the needles 4A and 4B, respectively, as shown in FIG. One warp 8
Is connected to two needles 4A and 4B via a pulley 52. Then, the hook 4A is engaged with the needle 4A pushed up by the knife 7A in response to the excitation of the solenoid 5, and thereby the needle 4A is engaged.
A is held in the raised position. The next movement causes the other needle 4
When B is pushed up by knife 7B, needles 4A and 4B
Are both in the raised position, and as a result, the warp yarns 8 bound to the lower ends of the needles 4A and 4B are pulled up. In this way, by pulling up the warp yarn 8, an opening is formed in the warp yarn 8 and the weft yarn is inserted into the opening portion.

On the other hand, when the solenoid 5 is not excited, the hook 40 does not engage the needle 4A, and the needle 4A descends together with the knife 7A descending. That is, when the needle 4B rises, the needle 4A descends instead of being replaced, so that the warp 8 cannot be pulled up.

In this way, by selectively exciting the solenoid 5, it is possible to select an arbitrary warp yarn 8 and weave the intended handle.

[0009]

By the way, the opening amount of the warp differs depending on the loom body to be used, and even when the same loom body is used, the required opening amount depends on the type of warp used in the woven fabric and the setting of the tension of the warp. Change. Since the opening amount of the warp yarn corresponds to the lift amount of the warp yarn, that is, the ascending / descending distance of the knife, in order to cope with these differences, for example, the first link 33 is formed with the long hole 52 for engaging the link pin 51, and the link pin is formed. After moving 51 along the long hole 52, it can be fixed to the link 33 by a bolt (not shown). That is, the distance from the swing fulcrum 53 of the link 33 to the link pin 51 is changed by changing the fixed position of the link pin 51 within the range of the long hole 52 according to the required difference in lift amount of the knife 7A (7B). By changing the vertical movement of the eccentric arm 32, the up-and-down distance of the knife 7A (7B) is changed,
The amount of lift of the warp is changed.

However, the center line of the slot 52 and the shaft 34
Since the distance between and increases with increasing distance from the fulcrum 53, when the fixed position of the link pin 51 is moved along the elongated hole 52, the center line position of the elongated hole 52 and the radius R ₁ of the eccentric arm 32 are defined. A deviation occurs from the center position of the pin 51, and a difference occurs in the rotation angle of the first link 33 when the eccentric arm 32 is in the same lowered position, for example. As a result, the positional relationship between the raised positions of the needles 4A and 4B and the hook 40 is deviated, and the hook 40 cannot engage with the needles 4A and 4B. In other words, if the lift amount of the warp yarn is changed, the lift position of the warp yarn also changes, and thus the lift amount cannot be changed as it is.

Therefore, in this warp selection device, the bars 37 and 38 are provided with a length adjusting mechanism to absorb the difference in the rotation angle of the first link 33 due to the movement of the link pin 51, and the needle 4A.
And the positional relationship between the raised position of 4B and the hook 40 is corrected. With this correction, the lift position of the warp can be held at the same position even if the lift amount of the warp is changed.

However, in the case of this apparatus, there are many adjustment points for changing the lift amount, and the adjustment work becomes complicated,
There was a problem that it took time to work. There is also a problem that the configuration of the apparatus becomes complicated by providing a plurality of adjusting mechanisms.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a warp selection device capable of changing only the lift amount of the warp without correcting the lift position of the warp.

[0014]

According to a first aspect of the present invention, a swingably supported arm that reciprocates a predetermined amount in synchronization with the operation of the loom body, and a predetermined fulcrum according to the reciprocating motion of the arm. A link connected to the arm that swings around
A knife that is connected to the link and moves up and down by a distance according to the swing angle of the link, and a unit that moves a connection point between the arm and the link to change the swing angle range of the link with respect to the reciprocating motion of the arm. In the warp selection device, a means for moving the connecting point along an arc corresponding to the swing radius of the arm is provided as the swing angle range changing means.

According to a second aspect of the present invention, in the first aspect of the present invention, the connecting point moving means is provided with a long hole formed along the arc of the link, and the long hole is formed while engaging with the long hole. It is composed of a pin attached to the arm that moves along with it, and means for selectively locking the pin at a plurality of moving positions along the slot.

According to a third aspect of the present invention, the first link, which swings around a predetermined fulcrum in synchronization with the operation of the loom body, and the first link
A second link that is connected to the link via an arm and swings around a predetermined fulcrum according to the swing of the first link;
A knife that is connected to the link and moves up and down by a distance according to the swing angle of the second link, and a swinging angle of the second link with respect to the swing of the first link by moving a connection point between the arm and the first link. In the warp selection device having means for changing the range, as the means for changing the swing angle range, there is provided means for moving the connecting point along an arc corresponding to the swing radius of the arm.

According to a fourth aspect of the present invention, in the second aspect of the present invention, the connecting point moving means has a long hole formed along the circular arc in the first link, and is long while engaging with the long hole. It consists of a pin attached to the arm that moves along the hole, and means for selectively locking the pin at a plurality of movement positions along the slot.

[0018]

According to the invention of claim 1, the moving means moves the connecting point of the arm and the link along an arc corresponding to the swing radius of the arm to change the position of the connecting point to the initial swing position of the link. It is possible to do without changing.

According to the second aspect of the present invention, the pin is moved along the long hole formed along the arc of the link, and the locking means is locked by selecting an arbitrary position from a plurality of moving positions. Therefore, the pin is always located on the arc corresponding to the swing radius of the arm. Therefore, the initial swing position of the link can be maintained constant regardless of the pin locking position.

In the invention of claim 3, the position of the connecting point is changed by the moving means moving the connecting point of the arm and the first link along an arc corresponding to the swing radius of the arm at the initial position of the movement. Can be performed without changing the initial swing position of the second link.

In the invention of claim 4, the pin is moved along the elongated hole formed along the arc in the first link, and the locking means is locked by selecting an arbitrary position from a plurality of moving positions. By doing so, the pin is always located on the arc corresponding to the radius of the arm. Therefore, the initial swing position of the second link can be held constant regardless of the locking position.

[0022]

1 and 2 show an embodiment of the present invention. The structure of the warp selection device other than the link mechanism is the same as that of the conventional example, and thus the description thereof is omitted.

In FIG. 1, the first link 33 is swingably supported on a fulcrum 53 as in the conventional example. An eccentric arm 32 is connected to the first link 33 via a link pin 51. Further, the arm 36 is connected via the link pin 61. The arm 36 is connected to a second link (not shown) having the same structure as the second link 35 of the conventional example.

The link pin 51 is rotatably supported on the upper end of the eccentric arm 36 and penetrates an arc-shaped elongated hole 56 formed in the first link 33. The center line of the long hole 60 is set so as to coincide with the locus of the radius R ₁ of the eccentric arm 32 in the lowered position. A plurality of pairs of bolt holes 62 are formed around the long hole 60. A flange 51A is formed at the tip of the link pin 51, and the link pin 51 passes through the flange 51A and is screwed into a bolt hole 62 as shown in FIG. Locked in.

The link pin 61 is rotatably supported at one end of the arm 36 and penetrates an arc-shaped elongated hole 66 formed in the first link 33. The center line of the long hole 66 is set so as to coincide with the locus of the radius R ₂ of the arm 36 in the raised position of the knife. A plurality of pairs of bolt holes 64 are formed around the elongated hole 66. A flange 61A is formed at the tip of the ring pin 61, and the link pin 61 is shown in FIG.
As shown in FIG.
It is locked at an arbitrary position along the long hole 66 by a bolt 63 that is screwed to the No. 4 screw.

Next, the operation will be described.

When the eccentric arm 32 is in the lowered position, the first link 33 is in the most counterclockwise position and the second link is in the most clockwise position. In this position the knife is in the raised position.

When the ascending / descending distance of the knife is increased, for example, the bolt 55 is first removed and the link pin 51 is attached to the elongated hole 60.
1 to the right side of FIG. 1, and is fixed to the link 22 again by the bolt 55. As a result, the distance between the fulcrum 53 and the link pin 51 is shortened, and the swing angle of the first link 33 with respect to the same vertical movement of the eccentric arm 32 is increased.
This also increases the lifting distance of the knife.

Even if the locking position of the link pin 51 is moved,
Since the ring pin 51 moves along the arc corresponding to the radius of the eccentric arm 32 in the lowered position, the rotation position of the first link 33 in the lowered position of the eccentric arm 32 is unchanged, and that in the raised position of the eccentric arm 32. First link 33
Only the rotation position of moves in the clockwise direction. Therefore, the rising position of the knife does not change, and the lowering position of the knife moves further downward, so that the up-and-down distance of the knife increases. Therefore, the positional relationship between the raised position of the needle driven by the knife and the hook driven by the solenoid does not change,
Without affecting the needle selection operation by the hook,
Only the lift amount of the warp changes.

The same applies to the movement of the locking position of the link pin 61. For example, when the locking position of the link pin 61 is moved upward in FIG. 1, the distance between the fulcrum 53 and the link pin 61 is increased, and the movement distance of the arm 36 is increased with respect to the rotation of the first link 33 in the same range. For this reason,
The rotation range of the second link is also increased, and the up-and-down distance of the knife driven up and down via the second link is increased. However, since the locking position of the link pin 61 moves along the arc corresponding to the radius of the arm 36 corresponding to the rising position of the knife, even if the locking position of the ring pin 1 changes, The rotation angle of the 2 link does not change,
By moving the lowering position of the knife further downward, the lifting distance of the knife increases. Therefore, the positional relationship between the raised position of the needle driven by the knife and the hook driven by the solenoid does not change, and only the lift amount of the warp changes without affecting the needle selection operation by the hook. .

In the warp selection device described above, it is necessary to make the vertical distances of the knife driven by the first link 33 and the knife driven by the second link the same. Therefore, first, by setting the locking position of the link pin 51, the first
The lifting distance of the knife driven by the link 33 is determined, and the locking position of the link pin 61 is determined so that the lifting distance of the knife driven by the second link is the same.

[0032]

As described above, according to the invention of claim 1, the means for moving the connecting point of the arm and the link along the arc corresponding to the swing radius of the arm is provided, so that the position of the connecting point can be changed. It can be performed without changing the initial swing position of the link. Therefore, it is possible to change only the lift amount without changing the lift position of the warp by moving the connecting point,
It is possible to easily change the lift amount of the warp in a shorter time as compared with the conventional device.

According to a second aspect of the invention, in the first aspect of the invention, the pin attached to the arm is moved along the arc-shaped elongated hole and locked at an arbitrary position. The swinging position of the link at the position can always be made constant, and the warp lift amount can be changed with a simple configuration.

According to the third aspect of the present invention, since the means for moving the connecting point of the arm and the first link along the arc corresponding to the swing of the arm is provided, the position of the connecting point is changed by the initial swing of the second link. It can be performed without changing the moving position. Therefore, it is possible to change only the lift amount without changing the lift position of the warp due to the movement of the connecting point, and it is possible to easily change the lift amount of the warp in a shorter time than the conventional device.

According to a fourth aspect of the invention, in the third aspect of the invention, the pin attached to the arm is moved along the arcuate elongated hole and locked at an arbitrary position. The swinging position of the second link at the position can always be made constant, and the warp lift amount can be changed with a simple configuration.

[Brief description of drawings]

FIG. 1 is an enlarged side view of a main part of a link showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view in which the connection points are also enlarged.

FIG. 3 is a schematic front view of a warp selection device and a loom body showing a conventional example.

FIG. 4 is a side view of the link mechanism of the warp selection device.

FIG. 5 is a front view of a knife, a needle and a hook for explaining a warp selection state.

[Explanation of symbols]

 32,36 Arm 33 First link 51,61 Link pin 53 Support point 55,63 Bolt 60,66 Long hole 62,64 Bolt hole

Claims (4)

[Claims] 1. A swingably supported arm that reciprocates a predetermined amount in synchronization with the operation of the loom body, and an arm that swings about a predetermined fulcrum according to the reciprocating motion of the arm. A link, a knife that is connected to the link and moves up and down by a distance according to the swing angle of the link, and a means that moves a connection point between the arm and the link to change the swing angle range of the link with respect to the reciprocating motion of the arm. In the warp selection device including and, as the means for changing the swing angle range,
A warp selecting device comprising means for moving the connecting point along an arc corresponding to the swing radius of the arm. 2. A moving means for moving the connecting point, a long hole formed in the link along the arc, and a pin attached to the arm for moving along the long hole while engaging with the long hole. 2. The warp selection device according to claim 1, further comprising means for selectively locking the pin at a plurality of movement positions along the long hole. 3. A first link that swings around a predetermined fulcrum in synchronization with the operation of the loom main body, and a first link that is connected to the first link via an arm and that is predetermined according to the swing of the first link. A second link that swings around a fulcrum, a knife that is connected to the second link and moves up and down by a distance according to the swing angle of the second link, and a connection point between the arm and the first link are moved. The first
In the warp selecting device including means for changing the swing angle range of the second link with respect to the swing of the link, the connecting point is an arc corresponding to the swing radius of the arm, as the swing angle range changing means. A warp selection device comprising means for moving along. 4. The moving means of the connecting point is attached to an elongated hole formed along the arc in the first link, and an arm that moves along the elongated hole while engaging with the elongated hole. 4. The warp selection device according to claim 3, comprising a pin and means for selectively locking the pin at a plurality of movement positions along the elongated hole.