JPS6021413Y2 - Drum stationary device for drum-type weft storage device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a drum-type weft storage device for a shuttleless loom, and in particular to a device that holds the drum stationary and stores the weft yarn by wrapping it around the circumference of the drum using a thread guide that rotates around the drum. This invention relates to a drum stationary device.

Conventionally, in this type of weft storage device, the drum cannot be directly fixed because the yarn path rotates around the drum due to its structure. After fitting the drum to the rotating shaft so that it can rotate freely, a shaft is provided that revolves around the drum integrally with the rotating shaft for the thread guide and can be rotated on its own, and a pair of planetary gears are fixed to this shaft. One of the planetary gears is meshed with a fixed gear provided on the bearing of the rotating shaft for the thread guide, and the other planetary gear is meshed with a gear provided integrally on the drum. Some drums are designed to keep the drum stationary even when the rotating shaft is rotated by the action of the planetary gears.

However, when gears are used in this way, lubricating oil is required, and as the gears rotate, this oil scatters onto the threads, staining the threads and causing stains on the fabric being woven. There was a problem.

The present invention was developed with the aim of solving these conventional problems. By using a wrap-around transmission device using pulleys and belts instead of gears, lubricating oil is not required and the thread is free from dirt. This is to prevent it from happening.

The present invention will be explained below based on an illustrated embodiment.

In the figure, 1 is the frame of the loom, 2 is a weft insertion air injection nozzle held in a nozzle holder 3 installed upright on the frame 1, and 4 is attached to a top stay 5 fixed to the nozzle holder 3, behind the axis of the nozzle 2. This is a guide placed on the left side in the figure.

A weft 6 led from a drum-type weft storage device to be described later is guided by a guide 4 and passed through a nozzle 2, and is inserted by air jetted from the nozzle 2 during weft insertion.

To explain the drum type weft storage device, frame 1
A bracket 8 having a bearing portion 8a is fixed with a bolt 7, and the axis of the bearing portion 8a is substantially aligned with the axis of the guide 4.

The rotating shaft 1 is connected to the bearing portion 8a via a ball bearing 11.
2 is rotatably supported, and a toothed belt 14 is wound between a toothed pulley 13 fixed to the rear end of the rotating shaft 12 and a drive pulley (not shown) of the loom, and the loom rotates once. For example, the rotating shaft 12 is rotated three times per rotation.

A drum support 16 is fitted to the small diameter portion 12a at the front end of the rotating shaft 12 via a ball bearing 15, and a washer 6
1 and a nut 62, and are supported so as to be relatively rotatable.
It is fixed.

The circumferential surface of the drum 18 is formed with a tapered portion 18a whose outer diameter gradually decreases from the rear end side toward the front end side, and a substantially straight portion 18b continuous with the minimum diameter portion and having the same diameter.

In addition, a thread guiding hole 20 is provided at the axis of the rotating shaft 12 and opens at the rear end surface.
is formed, and a pull-out hole 21 is opened on the circumferential surface of the rotating shaft 12, so that the inner part of the yarn guiding hole 20 and the pull-out hole 21 are communicated with each other.

A support rod 22 is erected on the front side of the pull-out hole 21 of the rotating shaft 12, and a thread guide 23 having two guide portions 23a and 23b is fixed to an intermediate portion of the support rod 22.

To explain the device for stopping the drum 18, an intermediate portion of a shaft 30 is rotatably supported by a bearing portion 22a formed at the tip of a support rod 22.
It is placed parallel to 2.

A toothed pulley 31 is provided at the front end and rear end of the shaft 30 (the left side in the figure is the front end and the right side is the rear end).
, 32 are fixed.

Further, a stepped disc-shaped holder 33 is fixed to the rear end surface of the bearing portion 8a of the bracket 8 with a bolt 34, and a toothed pulley 35 is fixed to this holder 33 with a bolt 36.

Here, a toothed belt 37 is wound between the toothed pulleys 31 and 35.

Furthermore, a toothed pulley 38 is integrally formed on the rear end side of the drum 18.

Here, a toothed belt 39 is wound between the toothed boob J32 and 38.

Furthermore, by making the toothed pulleys 31 and 32 the same diameter, and by making the toothed pulleys 35 and 38 the same diameter, the transmission ratio between the toothed pulleys 35 and 38 is set to 1:1. .

Next, the effect will be explained.

The rotating shaft 1 is connected to the rotating shaft 1 via the toothed pulley 13 by the toothed belt 14.
2 is rotated three times per rotation of the loom, and the thread guide 23 is rotated together with the support rod 22.

The shaft 30 also revolves together with the support rod 22, and the toothed pulley 31 rotates while revolving around the toothed pulley 35 to which the toothed pulley 31 is fixed.
2 also rotates on its own axis while revolving around the toothed pulley 38 on the side of the drum 18. In this way, the toothed pulley 32 rotates on its own axis while revolving around the toothed pulley 38. As a result, the toothed pulley 38 and therefore the drum 18 become stationary.

In this way, as the rotation shaft 12 rotates, the yarn guide 23 rotates around the stationary drum 18, and as a result, the yarn guide 23 is pulled out from the yarn feeder (not shown) and the yarn guide hole 2 of the rotation shaft 12 is rotated.
The weft yarn 6 guided through the weft thread 0 and the pull-out hole 21 is wound around the drum 18, and is retained by a locking body (not shown) formed on the drum 18.

As explained above, according to the present invention, since pulleys and belts are used, lubricating oil is not required unlike when gears are used, and therefore, the drum can be reliably moved without causing contamination of the threads with oil. This gives you the effect of being able to stand still.

[Brief explanation of the drawing]

The figure is a front vertical sectional view of a weft storage device showing an embodiment of the present invention. 6... Weft, 12... Rotation shaft, 18.
...Drum, 23...Thread guide, 31,
32, 35. 38... Toothed pulley, 37, 39
...Toothed belt.

Claims (1)

[Scope of utility model registration request] The drum 18 is supported on the rotating shaft 12 to hold the drum 18 in a stationary state, and a thread guide 23 attached to the rotating shaft 12
In a drum-type weft storage device for a shuttleless loom in which the weft 6 is wound around the circumferential surface of a drum 18 and stored, a pulley 31 that is driven from a rotating shaft 12 and revolves integrally,
A belt 37° 39 is wound between the pulleys 31 and 32, a fixed pulley 35 provided around the rotating shaft 18, and a pulley 38 provided integrally with the drum 18, respectively. A drum stationary device characterized in that the drum 18 is held stationary by setting the transmission ratio between the pulley 35 and the pulley 38 on the side of the drum 18 to be 1:1.