JPS594063Y2 - Box front evacuation device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a box front retracting device, and particularly to a box front retracting device for a beat-type loom that temporarily stops the rotation of the loom during changing.

Figure 1 schematically shows the surroundings of the box during batting.

During the changing operation, each part is operated by a series of cams driven by a changing gear motor at predetermined timings during one rotation of each cam.

That is, first, the box front defining the front of the box) B
F is retracted from the illustrated position in an appropriate direction, the ejection lever DL advances through the box back BB, pushes the traveling ST on the sled S forward and ejects it from the box, and the new guide FG protrudes. to place the new line in the correct position in the box, and then the box front (BF) returns to its original position to define the front of the box.

By the way, there have conventionally been two types of methods for retracting the box fluorocarbon BF: a method in which it is pulled up almost vertically, and a method in which it is pulled down vertically downward.

An example of a type in which the lever is pulled up vertically is disclosed in Japanese Utility Model Application No. 52-38266.

By the way, if the ejection operation is incompletely completed for some reason, the rotating rod may remain in the box without being ejected.

After this, when new shuttles are supplied, there will be two old and new shuttles lined up in the box.

In this state, if the box front that was pulled up earlier comes down to return to its original position, it will clip the new line, not only damaging the shuttle but also causing damage to the area around the box front. .

To avoid such inconvenience, for example, the patent application filed in 1973
The invention of No. 65356 proposes a type in which the box front is vertically pulled down.

By the way, the shuttle inside the box is always pressed against the front of the box by the shell.

Therefore, at the moment when the box front begins to descend and loses its ability to catch the front of the shuttle, the shuttle is thrown forward by the pressing force of the shell, its posture becomes abnormal, and the shuttle is ejected. tends to be incomplete.

In order to prevent this, in the invention of the above-mentioned patent application, a method is adopted in which the pressing force of the shell is released at the time of refilling.

However, in this case, the structure around the box becomes more complex and the number of parts increases.

This invention aims to provide a box front retracting device that completely ensures the ejection of the shuttle during reversing and is structurally simpler than conventional ones.

That is, the gist of this invention is to retract the box front toward the front and obliquely downward when changing pitches.

In the above-mentioned retraction forward and downward, the box front is moved almost horizontally forward at the beginning of the retraction, and after a certain point, the amount of downward movement is increased.

This invention will be explained in more detail below with reference to the accompanying drawings.

FIGS. 2A and 3 show the device of this invention in an inoperative state, that is, in a state in which the box front is not retracted.

The device is broadly divided into a box front BF, its drive source, and a group of intermediate links that connect these two.

1 fixed to the sled S at the inner and outer end positions of the shuttle box
The pair of brackets 1 each have one downwardly extending portion 1a, and between the ends of these downwardly extending portions 1a, the support shaft 3 extends horizontally and parallel to the box front (BF) so that the support shaft 3 can rotate. is supported by

The bracket 1 on the outer end side of the shuttle box further has a front extension part 1b, and a lower end of an arm 7 is loosely fitted into a pin 5 horizontally installed at the end of the front extension part 1b.

The upper end of this arm 7 is loosely fitted into a pin 9 horizontally installed in the box front (BF).

The box front (BF) has a pair of extensions extending forward and downward, and the upper end of an L-shaped bar 13 is loosely fitted into a pin 11 horizontally installed at the end of the extension.

Further, the lower end of this L-shaped bar 13 is tightly fitted to the above-mentioned support shaft 3.

Adjustment screws 15 are provided in the downward extension of the box front BF, and the tips of these adjustment screws 15 are in contact with the front surface of the sley S in the illustrated state.

By adjusting the adjustment screw 15, the state of close contact of the box front BF to the front surface of the sled can be adjusted as appropriate.

The front end of a lever 17 is further firmly fitted to the support shaft 3, and the upper end of a drive rod 21 is loosely fitted to a pin 19 disposed horizontally at the rear end of the lever 17.

This drive rod 21 is operatively connected to a cam (not shown) that completes one cycle by rotating once only when changing the shuttle, and is constantly pulled downward.
When changing the shuttle, it goes up and down at a predetermined timing.

By the way, the area around the shuttle box swings back and forth around the locking shaft, but the box front (BF) must remain in close contact with the front surface of the sled S even during this swinging.

That is, the intermediate link group interlocking with the box front (BF) needs to be arranged so as not to be affected by the above-mentioned rocking motion.

For this reason, the center of the lower end of the drive rod 21 (for example, the axis of the pin connection point with the lever) must be placed in line with the axis of the locking shaft.

(However, this does not mean that the lower end of the drive rod 21 is placed on the locking axis.

) Next, the operation of the device of this invention having the above structure will be explained by comparing FIGS. 2A and 2B.

When the timing for changing the shuttle comes, the drive source starts (for example, a cam starts rotating), and the drive rod 21 rises.

As a result, the levers 13 and 17 rotate in the counterclockwise direction in the figure around the support shaft 3, and the box front BF is moved around the arm 7.
It moves forward and downward around the pin 5 at the lower end of the sled, separating it from the front surface of the sled S.

That is, since the shuttle ST on the sled S loses its front support, it is pushed by the swell and moves slightly forward, away from the box back BB, and becomes in a state suitable for ejection by the ejection lever.

By the way, if the movement of the above-mentioned box fluorocarbon BF is graphically analyzed, it will be as shown in FIG.

That is, arm 7 and box front) BF and L-shaped bar 1
3 constitutes one set of links.

The front end of the box front) BF runs along the circumference around the lower end pin 13 of the lever 13, and the rear end runs along the arm 7.
They each move on the circumference centered on the lower end pin 5.

Therefore, the rear surface of box flon 1-BF (shuttle box defining surface) P
If this is expressed by the upper end pin 9 of the arm 7, 9 in the figure will be obtained for the same rotation angle of the arm 7 and the lever 13.
The trajectory is 1→92→93→...

That is, the box front rear surface P faces forward and approximately horizontally at the beginning of the movement, and after a certain point, it faces forward and downward and increases the degree of descent.

The distance of the above-mentioned substantially horizontal movement can be freely set by appropriately combining the dimensional relationships of each part in the link group.

Box Freon) As the BF moves forward, the shuttle ST is pushed by the well and moves forward in the shuttle box, but since the swell is usually equipped with a stopper, there is a limit to the distance the swell can push out.

Therefore, if the maximum extrusion distance by the slew and the above-mentioned approximately horizontal movement distance of the box front are set to be approximately equal (or the latter is made slightly thicker), the shuttle ST will be able to move the sleel while pressing its front surface against the rear surface P of the box front. Since the shuttle ST is pushed out by

By the way, assume that there are two old and new shuttles lined up in a shuttle box due to defective shuttle ejection.

At this time, when the box front (BF) attempts to return to its original position, its movement direction will be rearward and upward.

Therefore, the new line on the front side is pushed up by the upper surface Q of the box front and leaves the shuttle box, and only the new line on the rear side remains in the shuttle box and its front side is restrained by the box front (BF) which has returned to its original position. Ru.

The new line that was pushed up falls into the ejection path.

Therefore, when the loom is restarted, since the rotation is shuttled, a command to replace the shuttle is immediately issued, and the loom is stopped again, but there is no problem such as damage to the loom.

As is clear from the above, according to this invention, there is no need to complicate the structure by providing a shell release mechanism etc. around the shuttle box.
The shuttle is placed in a stable ejection position while suppressing the movement of the shuttle, and even if two shuttles remain in the shuttle box due to poor ejection, only one of them can be rotated reliably and automatically. It is possible to re-bind the loom and restart the loom.

Therefore, the occurrence of defective ejection rods is suppressed, and even if ejection rod defects occur, the troubles caused by the ejection rod defects are automatically cured, improving weaving efficiency, reducing parts damage and yarn damage, and improving product quality. significantly improve.

[Brief explanation of drawings]

FIG. 1: A simplified perspective view showing the area around the shuttle box. FIG. 2A: A side view showing the main parts of the device of this invention in a non-operating state. FIG. 2B: A side view also shown in the operating state. Fig. 3; also a partially cutaway front view. FIG. 4; Analysis diagram of the retraction movement trajectory. BF...Box front, DL...
Shuttle lever S...Sleigh, 5-chop...Shuttle, FG...Shingan guide, 3...Spindle,
7...Arm, 13...L-shaped bar 1
7... Lever, 21... Drive rod.

Claims (1)

[Claims for Utility Model Registration] The box front) BF and its drive source 21 are connected by an intermediate link group 13. A box front evacuation device is installed on a sleigh for movement, and when a drive source is started at the time of change, the box front reciprocates a predetermined distance along the circumference.