JPH0238947Y2 - - Google Patents

Description

[Detailed Description of the Invention] Field of Industrial Application The present invention relates to a draft device used in a spinning machine.

〓Prior art〓 A draft device in which a plurality of top and bottom roller pairs are arranged side by side, such as back, middle, and front roller pairs, sequentially increases the number of rotations of each roller pair and passes between the roller pairs. By doing so, the fiber bundle is drafted to a predetermined thickness. By the way, the fiber bundles to be drafted have various fiber lengths depending on the material, etc., and in order to draft fiber bundles with different fiber lengths to a desired thickness at any time, a pair of rollers arranged in parallel according to the fiber length is required. The distance between each pair of rollers must be adjusted accordingly. For this reason, a drafting device with a structure in which the distance between each pair of rollers cannot be adjusted is limited in the types of fibers that can be processed, so a device with a structure in which the middle roller, back roller, etc. can be moved in addition to the top roller is used. It became like that. This conventional device is
For example, when a middle roller is rotatably supported by a support plate, a long hole is provided in the support plate, and the support plate is fixed to a base with screws, the operator measures the insertion position of the screw into the long hole. It had a structure that allowed for

〓Problems to be solved by the invention〓 Conventional drafting equipment, which can freely adjust the distance between the roller pairs according to the fiber length of the fiber bundle to be processed, requires an operator to move the rollers while measuring the distance between the roller pairs. Since the parts were moved and screwed in place, the adjustment work was very troublesome and time consuming, which caused problems in terms of production efficiency.

The present invention relates to a draft device configured to solve this problem.

〓Means for solving the problem〓 In a drafting device in which multiple pairs of rollers such as front, middle, and back rollers are arranged side by side, the other rollers except the front roller can be connected to the previous stage or the rear stage, or even the front and rear stage rollers. They were rotatably supported by support members such as blocks at various intervals.

〓Operation〓 In the case of a three-wire draft device, a back crawler and a middle roller are rotatably supported by a support member and formed into a pair of cassettes, and the back crawler and middle roller supported in this cassette shape are A plurality of models are available with various distances between the two. Therefore, in order to process a fiber bundle with a long fiber length, a fiber bundle with a long distance between the back roller and the middle roller is selected, and this is set on a base and fixed with screws or the like. If the fiber length of the fiber bundle to be processed changes, the optimum one is selected from a set of cross rollers and middle rollers whose spacing is set according to the fiber length, and is replaced as needed.

〓Example〓 An example of the implementation of the draft device of the present invention will be described below with reference to the drawings.

Although not shown, the draft device 1 of the present invention is used in a pneumatic spinning device that produces spun yarn by twisting and binding fiber bundles using one air injection nozzle and an untwisting belt.

The draft device 1 includes three pairs of rollers, a pair of back rollers, a pair of middle rollers, and a pair of front rollers, which are arranged side by side in order from the top to the bottom in FIG. 1 in the traveling direction of the fiber bundle, in this embodiment, In the figure, only the bottom side of the pair of rollers, which form a pair of top and bottom rollers, is shown. The back bottom roller 2 and the middle bottom roller 3 have support shafts 4 and 5 provided integrally with both rollers 2 and 3, which are rotatably supported by bearing boxes 6 and 7, respectively. is supported by a support member 8. The support member 8 is made of a block made of cast metal or the like, and has two through holes 9 and 10 so that the bearing boxes 6 and 7 can be fitted into the through holes 9 and 10, respectively. The support member 8 and the bearing boxes 6, 7 are fastened and fixed by screws 11. Incidentally, although not shown, a plurality of support members 8 are prepared in which the distance L between the center lines 12 and 13 of the through holes 9 and 10 is different, and the distance between the through holes 9 and 10 is varied. By supporting the back bottom roller 2 and the middle bottom roller 3 by the supporting member 8,
The distance between the respective rotation center axes of both rollers is changed. The support member 8 is attached to the base 1
4 with screws 15, and the plurality of supporting members are all provided with screw holes at the same position. The back bottom roller 2 and the middle bottom roller 3 are connected to line shafts 16 and 17 via electromagnetic clutches 18 and 19, respectively, by belts (not shown).
By interposing 8 and 19 in the power transmission mechanism,
The support member 8 can be replaced with an arbitrary one while the line shafts 16 and 17 are rotated. Incidentally, an apron 21 made of an endless annular belt-shaped body is spanned between the middle bottom roller 3 and the tensile bar 20. Like the back bottom roller 2 and middle bottom roller 3, the front bottom roller 22 is cantilevered with a support shaft 24 provided integrally with the front bottom roller 22 rotatably supported by a bearing box 23. The bearing box 23 is connected to the base 14
It is fixed at This front bottom roller 22
is the line shaft 2 at the shaft end of the support shaft 24.
5 by a belt (not shown).

In order to attach the support member 8 to the base 14, the distance between the back bottom roller 2 and the middle bottom roller 3 supported by the support member 8 is suitably adjusted to the fiber length of the fiber bundle to be drafted. Select and fix with screws 15. Thereafter, when processing a fiber bundle with a different fiber length, the support member 8 supporting both rollers 2 and 3 that had been used up until then is removed from the base 14, and the rollers matching the newly selected fiber length are removed. The support member 8 is set and supported at
is attached to the base 14 and drafting is performed. Since the drafting action on the fiber bundle is the same as that of the conventional device, a detailed explanation of the action will be omitted.

〓Effect of the invention〓 The drafting device of the present invention has at least two pairs of rollers supported by supporting members with various distances between each roller pair. Fiber bundles of any fiber length can be processed by simply selecting a support roller with a spacing that matches the fiber length of the fiber bundle to be processed and attaching it to the base, and replacing the support member is extremely easy. so it can be done to
It is possible to replace the spinning machine with one that matches the fiber length at any time without sacrificing productivity, and the spinning machine that employs the device of the present invention can produce high-quality yarn.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the drafting device of the present invention, and FIG. 1 is a side view showing the embodiment implemented in a three-wire drafting device with the top side roller pair omitted, and FIG. 2 shows the main parts. The front view shown in longitudinal section. 1... Draft device, 2... Back bottom roller, 3... Middle bottom roller, 6, 7, 23...
... Bearing box, 8 ... Support member, 14 ... Base, 22 ... Front bottom roller.

Claims (1)

[Scope of utility model registration request] In a drafting device in which multiple pairs of rollers such as front, middle, and back rollers are arranged side by side, other rollers other than the front roller can be used to create blocks, etc. by varying the spacing between the rollers in the previous stage or the rear stage, or even with the rollers in the front and rear stages. A draft device characterized in that it is rotatably supported by a support member.