JPS6133003Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a drafting device in which a front top roller, a middle top roller, and a back top roller are pressed against a bottom roller by a weighting arm. The present invention relates to a drafting device in which a middle top roller first comes into contact with a bottom roller when the rod is moved from a fully lifted state to an intermediate indirect pressure state.

(Prior Art) In recent years, a waiting method in which a top roller is pressed against a bottom roller by a waiting arm has been preferred in terms of operability and pressing force.

However, according to the currently used waiting method, when the operating rod is used to move the waiting arm from the fully lifted state to the intermediate indirect pressure state, the front top roller first comes into contact with the front bottom roller. and start rotating. However, the rotational speed of the front roller during levering is more than 10 times the rotational speed if the non-rotating back roller were to rotate. For this reason, when the roving is pulled out onto the front roller during the roving work, it causes the roving to break. Therefore, it is necessary to train the front top roller, the middle top roller, and the back top roller to press the bottom rollers simultaneously using both hands, which is not only uneconomical but also extremely dangerous. It was accompanied by In addition, when stopping the roving thread from reaching the middle roller in order to prevent the above-mentioned roving thread breakage, the collector may come off or the thread may come off.
Workability also becomes difficult.

(Problems to be Solved by the Invention) An object of the present invention is to provide a drafting device that eliminates the drawbacks of the above-mentioned weighting arm system.

(Means for Solving the Problems) The present invention has the following configuration to achieve the above object. That is, the present invention provides a drafting device in which a front top roller, a middle top roller, and a back bottom roller provided on a weighting arm are crimped to each bottom roller. This drafting device is characterized in that the thickness of the contact pressure order adjusting section 12 and/or the length of the spring 13 are thicker or longer than those attached to the front top roller and the back top roller.

The present invention will be explained below based on embodiments shown in the drawings. FIG. 1 is a perspective view of the drafting device, and in FIG. 1, A shows the operating rod in a fully lifted state, and B shows its intermediate indirect pressure state. In state A, the front top roller, middle top roller, and back top roller do not contact each bottom roller. Here, the term "middle top roller" includes both a cradle type and a simple roller type. The waiting arm 2 includes a loading device 10 for pressing the back bottom roller 4, middle top roller 6, and front top roller 8 onto the back bottom roller 5, middle bottom roller 7, and front bottom roller 9, respectively. They are provided at positions corresponding to the back roller, middle roller, and front roller. For installation, the fixed guide 11 of the loading device 10 fits into a hole (not shown) in the waiting arm 2, and bars on both sides of the fixed guide 11 prevent it from falling downward. The loading device 10 includes a fixed guide 11, a contact pressure order adjustment section 12, a spring 13,
The spring guide part 16 and the arbor mounting part 14 are provided in this order, and the space between them is fixed.

Here, the above-mentioned intermediate indirect pressure state B refers to the state before the operating rod 1 is pushed down and finally pressurized by the action of the spring 13 of the loading device 10. The arbor mounting portion 14 is the same for all top rollers, and as shown in FIGS. 1 and 2, the shafts of the front top roller, middle top roller, and back top roller, that is,
It is removably provided in such a way that it wraps around 5. The intermediate indirect pressure state can be achieved by using the same spring 13 as shown in FIG. In addition, by making only the spring 13 in the middle roller longer than the other rollers, the combined length of the contact pressure order adjusting section 12 and the spring 13 in the middle roller is made longer than that in the other rollers. This is achieved by: Here 3 is the axis.

Now, the operation of the drafting device of the present invention will be explained. When the operating rod 1 is lowered to enter the intermediate indirect pressure state B, the middle top roller 6 comes into contact with the middle bottom roller 7. However, at the time of levering, the front top roller 8 and the back top roller 4 are
They are not in contact with the front bottom roller 9 and back bottom roller 5, respectively. Therefore, the roving Y is only pulled forward by the middle rollers 6 and 7;
Since the rotational speed of the roller 7 is approximately as low as that of the back rollers 4 and 5, the course of the roving can be easily corrected. Further, by bringing only the middle top roller into contact with the middle bottom roller, the load on the machine can not be increased at once. When the operating rod 1 is further pushed down to bring it into a state of complete contact, each top roller will come into contact with each bottom roller.

(Effects of the invention) In this way, the present invention is configured such that only the middle top roller contacts the bottom roller in the intermediate indirect pressure state, so there is no breakage of the roving thread, and the operating rod can be lowered in stages, so the roving can be lowered in stages. The course of the thread can be corrected with one hand, and the pressure work is simple.Compared to conventional devices that apply pressure in an instant, the impact of the shot on other attached devices is minimal, and this invention is extremely effective. This is a useful idea.

[Brief explanation of the drawing]

The figures relate to the present invention; FIG. 1 is a perspective view of a drafting device, and FIG. 2 is a perspective view of a loading device. 1... Operating rod, 2... Waiting arm, 1
0...Loading device, 12...Contact pressure order adjustment section, 13
...Spring, 15...Arbor.

Claims (1)

[Scope of utility model registration request] In a drafting device configured to press a front top roller, a middle top roller, and a back top roller provided on a weighting arm to each bottom roller, a contact pressure order adjustment unit attached to the middle top roller in an intermediate pressure state A drafting device characterized in that the thickness of the spring 12 and/or the length of the spring 13 are thicker or longer than those attached to the front top roller and the back top roller.