JP2006316369A - Roller contact-changing over apparatus of cradle in draft apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roller contact-changing over apparatus capable of simultaneously changing over contact of a cradle with roller in a draft apparatus from a press state to a release state and from the release state to the press state. <P>SOLUTION: In the draft apparatus equipped with a plurality of top rollers and a plurality of bottom rollers corresponding to the top rollers and drafting a sliver by keeping close contact of each top roller with each bottom roller through a contact energizing means, apparatus for changing over contact of the cradle with the rollers in the draft apparatus comprises providing a roller contact changeover means 1 for simultaneously changing over roller contact by the contact energizing means from a press state to a release state and from the release state to the press state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a draft device in a spinning machine, and in particular, a roller contact pressure in which the roller contact pressure of a cradle in the draft device is simultaneously switched from a pressed state to a released state, and from a released state to a pressed state. The present invention relates to a switching device.

As is well known, according to a draft device in a spinning machine, the machine is operated with contact pressure applied to a plurality of pairs of draft rollers composed of a top roller and a bottom roller, but the machine stops. If you do, you must remove this contact pressure. This is due to inconveniences such as rubber deformation if the state where pressure is applied without rotating the roller group.

Conventionally, when removing the roller contact pressure or applying the roller contact pressure, the cradle handle of all the weights must be manually raised and lowered, when starting the machine operation, and The burden on the worker when stopping the operation of the machine was great.

Japanese Utility Model Publication No. 3-74677 Japanese Utility Model Publication No. 5-37977

Therefore, in the draft device in the spinning machine, the roller contact pressure of the cradle in the draft device is changed from the press (pressurization) state to the release (release) state at the start of the machine operation and at the stop of the machine operation. Another object of the present invention is to provide a roller contact pressure switching device for a cradle in a draft device that can be switched simultaneously from a released state to a pressed state.

In order to achieve the above object, the present invention specifically includes a plurality of top rollers and a plurality of bottom rollers corresponding to the top rollers, and the top rollers and the bottom rollers are contacted with each other. In the draft device for drafting the sliver while maintaining the contact pressure state via the biasing means, the roller contact for simultaneously switching the roller contact pressure by the contact pressure biasing means from the press state to the release state and from the release state to the press state. The cradle roller contact pressure switching device in the draft device is provided with a pressure switching means.

Further, in the present invention, the invention according to claim 2 is the cradle roller contact pressure switching device in the draft device according to claim 1, wherein the roller contact pressure switching means includes a cylinder provided for each weight. And a link mechanism that simultaneously switches the roller contact pressure by the contact pressure urging means from the pressed state to the released state and from the released state to the pressed state in response to the output of the cylinder. Is.

Further, in the present invention, the invention described in claim 3 is the cradle roller contact pressure switching device in the draft device according to claim 1 or 2, wherein the cylinder provided for each weight is operated. This is characterized in that the cylinders of all the spindles are simultaneously actuated by operating the valve mechanism.

According to the cradle roller contact pressure switching device in the draft device according to the present invention, the cradle roller contact pressure switching device includes a plurality of top rollers and a plurality of bottom rollers corresponding to the top rollers, and the top rollers and the bottom rollers are contacted with each other. In the draft device that drafts the sliver while maintaining the contact pressure state via the urging means, the roller contact pressure switching means that switches the roller contact pressure by the contact pressure urging means at the same time is provided, so that the machine starts operating. In addition, when the machine is shut down, the roller contact pressure of the cradle in the draft device can be switched simultaneously from the pressed state to the released state, and from the released state to the pressed state, which is extremely effective in terms of labor saving. It can be said that it works.

Hereinafter, a roller contact pressure switching device for a cradle in a draft device according to the present invention will be described in detail based on specific embodiments shown in the drawings. FIG. 1 shows an example of a roller contact pressure switching device for a cradle in a draft device according to the present invention, and is a schematic side sectional view showing a press state in which roller contact pressure is applied between each pair of draft rollers. FIG. 2 is a schematic sectional side view showing a released state with the roller contact pressure removed.

First, a spinning machine to which the present invention is applied will be described. As shown in FIGS. 3 and 4, this spinning machine has a configuration in which a large number of spinning units U are arranged, and a sliver L is sent to a draft device D through a trumpet T and is sent by an air spinning device Sp. After being formed into the spun yarn Y, the spun yarn Y is wound around the winding portion W through the nip roller Rn and the slab catcher Z. Reference symbol P is a piecing device that performs piecing, and is configured to run inside and below the spinning device along the longitudinal direction of the spinning device.

A process until the sliver L is formed into the spun yarn Y and formed in the package will be described with reference to FIGS. The spinning device to which the present invention is applied includes a draft device D and an air spinning device Sp provided on the downstream side of the pair of front rollers Rf2 and Rf3 in the draft device D.

The draft device D in the spinning machine is composed of a plurality of pairs of draft rollers serving as fiber feeding means. The draft roller is for drafting the sliver L, and includes, for example, a front roller Rf, a second roller Rs having an apron e, a third roller Rt, and a back roller Rb, all of which are top rollers Rf2, It is a combination of Rs2, Rt2, Rb2 and bottom rollers Rf3, Rs3, Rt3, Rb3.

The top rollers Rf2, Rs2, Rt2, and Rb2 and the bottom rollers Rf3, Rs3, Rt3, and Rb3 are in contact with each other and rotate in opposite directions. Therefore, the sliver L is guided between the top rollers Rf2, Rs2, Rt2, Rb2 and the bottom rollers Rf3, Rs3, Rt3, Rb3, and the top rollers Rf2, Rs2, Rt2, Rb2 and the bottom rollers Rf3, Rs3, Rt3. The sliver L can be drafted by Rb3, and the drafted fiber bundle is supplied from the front roller pair Rf2, Rf3 of the draft device D to the pneumatic spinning device Sp.

Among the upper and lower rollers, the top rollers Rf2, Rs2, Rt2, and Rb2, which are upper rollers, are supported by a draft cradle DC. The draft cradle DC rotates around the pivot shaft 31. It is configured to move freely. The draft cradle DC includes a cradle handle 32 on the free end side. The cradle handle 32 is rotatable around a pivot point 33, and a hook 34 is provided at one end. The hook 34 is locked by engaging with a stopper 35 fixed to the machine base. The draft cradle DC is provided with a torsion spring on the pivot shaft 31 and opens to a position indicated by an imaginary line when the hook 34 is removed from the stopper 35.

In relation to the draft cradle DC, the top rollers Rf2, Rs2, Rt2, and Rb2 are contacted to urge the top rollers in contact with the bottom rollers Rf3, Rs3, Rt3, and Rb3, respectively. Pressure urging means 36 is provided. The contact pressure biasing means 36 includes a spring box 38 in which a spring 37 is built.

One end 37a of a spring 37 in the contact pressure urging means 36 is fixed to a base portion 38a of a spring box 38, and a contact pressure block 39 is attached to the other end 37b. When each of the top rollers Rf2, Rs2, Rt2, and Rb2 is in contact with the bearing portion and the draft cradle DC is in the closed position (state indicated by a solid line in FIG. 3), the top rollers Rf2, Rs2 , Rt2 and Rb2 are brought into contact with the bottom rollers Rf3, Rs3, Rt3 and Rb3 in an appropriate contact pressure state.

The draft device D is a device that extends the sliver L supplied through the trumpet T to a predetermined thickness, and performs drafting by gradually increasing the rotational speed of each roller. The sliver L drafted to a predetermined fineness is supplied to an air spinning device Sp, which will be described later, and formed on the spun yarn Y in the air spinning device Sp.

An air spinning device Sp is disposed on the downstream side of the draft device D. The pneumatic spinning device Sp has a structure that incorporates a nozzle that enables the generation of a swirling airflow when the fiber bundle delivered from the draft device D passes through the inside.

In this configuration, the present invention is provided with the roller contact pressure switching means 1 for simultaneously switching the roller contact pressure by the contact pressure urging means 36 from the press state to the release state and from the release state to the press state. It consists of things. The roller contact pressure switching means 1 includes a cylinder 2 provided for each weight, and a roller contact pressure by the contact pressure urging means 36 in response to an output of the cylinder 2 from a pressed state to a released state, and in a released state. And a link mechanism 3 for simultaneously switching to a pressed state.

In the present invention, the roller contact pressure switching means 1 is constituted by a combination of a cylinder 2 and a link mechanism 3 operated by a valve mechanism Va as shown in FIGS. 1 and 2, for example, in a specific embodiment. At least two pairs of first and second connection links 5 and 6 are attached to the output shaft 4 of the cylinder 2 so as to be rotatable around a pivot shaft 7. The other end side of each first connection link 5 is connected to a fixed link bar 9 fixed to the machine base of the draft cradle DC via a pivot shaft 8, and each second connection link 6. Is connected to the movable link bar 11 via the pivot shaft 10.

In the present invention, the movable link bar 11 is provided with a plurality of pressure urging means 36 corresponding to the draft roller pair. As shown in FIG. 1B, the pressure biasing means 36 includes a spring box 38 to which the movable link bar 11 is attached, a spring 37 axially stretched inside the spring box 38, and a free end side of the spring 37. And a pressure contact block 39 that contacts the bearing portion 12 of the draft roller.

One end 37a of the spring 37 in the contact pressure urging means 36 is fixed to a base portion 38a of a spring box 38, and the contact pressure block 39 is attached to the other end 37b. The top rollers Rf2, Rs2, Rt2, and Rb2 are in contact with the bearings 12 of the top rollers Rf2, Rs2, Rt2, and Rb2, and the top rollers Rf2, Rs2, Rt2, and Rb2 are moved to the bottoms when the draft cradle DC is in the closed position. The rollers Rf3, Rs3, Rt3, and Rb3 are brought into contact with each other in an appropriate contact pressure state.

According to the roller contact pressure switching means 1 configured as described above, the top roller Rf2 in each draft roller is operated via the cylinder 2, the link mechanism 3, and the pressure contact biasing means 36 by operating the valve mechanism Va. , Rs2, Rt2, and Rb2 are maintained in a pressed state in which contact pressure is applied to each of the bottom rollers Rf3, Rs3, Rt3, and Rb3 as shown in FIG. 1A, or as shown in FIG. The release state can be maintained with the pressure released.

In the present invention, the output line OL of the valve mechanism Va is connected in parallel to the cylinders 2 provided on the respective weights, whereby the top rollers Rf2, Rs2, Rt2, Rb2 in the respective draft rollers for each weight. The contact pressure can be switched simultaneously. In this case, some weights do not need to be pressured, but the weights can be kept free of pressure by not applying the cradle handle as before.

In the present invention, the roller contact pressure switching means 1 may be configured to utilize a rotational motion of a motor or the like in addition to the driving method by the cylinder.

FIG. 1 shows an example of a roller contact pressure switching device for a cradle in a draft device according to the present invention. FIG. 1A is a schematic diagram showing a press state in which roller contact pressure is applied between each pair of draft rollers. FIG. 1B is a schematic cross-sectional side view showing a specific configuration of the pressing and urging means. FIG. 2 is a schematic cross-sectional side view showing a released state in which the roller contact pressure is removed in the cradle roller contact pressure switching device in the draft device. FIG. 3 is a schematic side view showing an outline of a main part of a spinning machine formed by combining a conventional typical draft device. FIG. 4 is a front view showing an entire spinning machine having the present invention applied thereto.

Explanation of symbols

D Draft device Sp Spinning device L Sliver Rf Front roller Rs Second roller Rt Third roller Rb Back roller Rf2, Rs2, Rt2, Rb2 Top roller Rf3, Rs3, Rt3, Rb3 Bottom roller 1 Roller contact pressure switching means Va Valve mechanism OL Valve mechanism Output line 2 cylinder 3 link mechanism 4 cylinder output shaft 5 first connection link 6 second connection link 7 pivot shaft 8 pivot shaft DC draft cradle 9 fixed link bar 10 pivot shaft 11 movable link bar 12 draft Roller bearing portion 36 Contact pressure biasing means 37 Spring 38 Spring box 39 Pressure contact block

Claims (3)

A draft comprising a plurality of top rollers and a plurality of bottom rollers corresponding to the top rollers, and drafting the sliver while maintaining the contact pressure state between the top rollers and the bottom rollers via contact pressure urging means. A roller for a cradle in a drafting device, characterized in that there is provided roller contact pressure switching means for simultaneously switching the roller contact pressure by the contact pressure urging means from the pressed state to the released state and from the released state to the pressed state. Contact pressure switching device. The roller contact pressure switching means includes a cylinder provided for each weight, and in response to an output of the cylinder, the roller contact pressure by the contact pressure urging means is changed from the pressed state to the released state, and from the released state to the pressed state. The cradle roller contact pressure switching device in the draft device according to claim 1, comprising a link mechanism that switches all at once. 3. A valve mechanism for operating a cylinder provided for each of the weights is provided, and the cylinders of all the weights are operated simultaneously by operating the valve mechanism. A roller contact pressure switching device for a cradle in the draft device as described.

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