GB2139253A - Weaving machine frame - Google Patents

Abstract

A weaving machine frame consists of two side walls (1, 2) which are interconnected by at least three tubular braces (3) which may be in parts so as to allow for the machine to be easily made wider said parts being connected by members (4, 5). The warp beam may be removably and adjustably fixed by brackets to the side frames 1, 2. <IMAGE>

Description

SPECIFICATION Weaving machine frame The present invention relates to a weaving machine frame.

The frames of known weaving machines are formed as two stationary cast side wall components interconnected by a cast main beam.

The basic structure is reinforced by two welded frames, on which is mounted either the dobby, or the eccentric shed forming mechanism.

A further known weaving machine frame consists of two side wall components formed from precision castings, which are interconnected by four beams formed from 'U'-section steel. The disadvantage of those frames is that if it required to increase the working width of the weaving machine the construction is insufficiently variable. The assembly cannot be made wider so that it is necessary to exchange the interconnecting beams. Upon increasing width of the machine, the reactive forces of the movable machine parts are increased and the frame intended to retain those reactions has to be reinforced either by increasing the dimensions of its parts, or by adding auxiliary frames for the separate mechanisms. Moreover, upon extending the width of the beat-up mechanism, its stiffness is decreased.The decreased stiffness of the beat-up mechanism affects the technological applicability of the weaving machine, particularly at high setts and upon weaving heavyweight fabrics. The disadvantage of adapting the known arrangements is in the considerable articulation and intricacy of the frames and in this increased total mass. This latter is disadvantageous not only from the point of manufacturing and material cost, but also because of the necessity of increasing the strength and load carrying capacity of the weaving mill floors. For the same reason this prevents such machines from being mounted in multi-story buildings.

A weaving machine frame according to the present invention comprises two side walls, fixable at their bottom sides to a floor, the side walls being mutually interconnected by at least three tubular braces, the frame including a main drive shaft and a rocking shaft of a beat-up mechanism, each side wall having a warp beam bracket.

The advantage of the frame according to the present invention consists mainly in its assembly arrangement. By providing tubular braces, which are suitably in parts interconnected by connecting parts, a simple and light-weight arrangement of the frame is obtained which is also sufficiently stiff. The force reactions of the beat-up mechanism are spread by the braces to the other parts of the frame in which they are attenuated. In this manner, a high stiffness of the beat-up mechanism is achieved even with wide machine widths, without the necessity of changing the design of the beat-up mechanism, so that the diameter of the rocking shaft need not be enlarged. When the machine has to be repaired only the defective part need be dismounted and replaced by a new one.It is possible to proceed in a similar manner when extending or possibly reducing the width of the machine by adding or removing the separate parts.

An embodiment of the present invention will now be described by way of example with reference to the accompanying drawings in which Figure 1 is a front view of a weaving machine frame according to the invention, Figure 2 is a cross sectional side view of Fig. 1, Figure 3 is a front view of part of a further frame according to the present invention, and Figure 4 is a cross sectional side view of Fig. 3.

In the left side wall 1, a not represented gear box with the drive for the main operating mechanisms is mounted. The right side wall 2 is made in the form of a housing. Both side walls 1, 2 are mutually interconnected by three tubular braces 3. The upper brace 3 comprises one integral part and the two lower braces consist of several parts. The first parts of the lower braces 3 are fixed at one end in the left side wall 1 and at the other end in the first connecting part 4. The second parts of the lower braces 3 are fixed each at one end to the first connecting part 4 and at the other one to the second connecting part 5. The third parts of the lower braces 3 are fixed at one end in the second connecting part 5, and at the other end in the right side wall 2.The number of the connecting parts 4, 5 and thus also that of the lower braces 3 is determined by the necessary width of the frame. If the frame is only to be narrow, the connecting parts are not necessary, as the braces are formed by only a single part. The housings for the beat-up mechanism 6 are mounted in the upper parts of side walls 1, 2, inside which the rocking shaft 7 of the beat-up mechanism is mounted. The main shaft 8 passes throughout the whole width of the machine. Shafts 7 and 8 are provided with bearings 9, where they pass through the connecting parts 4 and 5. On the rocking shaft 7 is fixed the not shown beat-up mechanism, which consists of an underslay mounted on the rocking shaft 7, on which the slay arms with the reed are fixed. On the side walls 1, 2 are mounted brackets 10 for a warp beam (not shown).

When using a sectional warp beam, one connecting part 4 is mounted in the centre of the frame, and the central bracket 10 of the warp beam is fixed thereto. If it is required to narrow the width of the fabric, the central connecting part is omitted, and a pair of auxiliary beams 11 is mounted between the connecting parts 4, 5 near to the centre of the frame centre. The bracket 10 of the warp beam is then mounted displaceably in an adjustable manner on the auxiliarly beams (Fig. 3).

In a further embodiment of the frame of a single auxiliarly beam 11 is mounted between connecting parts 4, 5 to which bracket 10 is fixed by its upper part. The lower part of bracket 10 is then fixed displaceably to the lower brace 3.

It is advantageous for the lowermost brace to be of a greater diameter than the other traces, thus becoming the main brace so that the mechanical stresses are best resisted. In the further embodiment each brace comprises several parts, e.g. the first, second or the third part. All first, second or third parts of braces 3 are called partial.

Claims (9)

1. A weaving machine frame provided with a main mechanism drive gearbox, the frame comprising two side walls, fixable at their bottom sides to a floor, the side walls being mutually interconnected by at least three tubular braces, the frame including a main drive shaft and a rocking shaft of a beatup mechanism, each side wall having a warp beam bracket.

2. A frame as claimed in Claim 1, at least one brace comprises two parts mutually interconnected by means of at least one connecting part, which is provided with bearings for both the main shaft and the rocking shaft.

3. A frame as claimed in Claim 2, wherein the parts of the braces are mutually interconnected by at least one connecting part.

4. A frame as claimed in any one of Claims 1 to 3, wherein the rocking shaft is mounted with its ends in housing for the beatup mechanism, which housings are mounted externally on the inner sides of the side walls.

5. A frame as claimed in Claim 2 or 3, wherein a bracket for the warp beam is mounted on the or each connecting part.

6. A frame as claimed in Claim 2 or 3, wherein at least one auxiliarly beam is mounted on the or each connecting part to which auxiliary beam or beams a mounting bracket for the warp beam is displacably and adjustably mounted.

7. A frame as claimed in Claim 2, wherein the or each connecting part is fixable at its bottom to the floor.

8. A weaving machine frame substantially as described with reference to Figs. 1 and 2 of the accompanying drawings.

9. A weaving machine frame substantially as described with reference to Figs. 3 and 4 of the accompanying drawings.