CN108930084B

CN108930084B - Frame plate and heald frame

Info

Publication number: CN108930084B
Application number: CN201810494873.0A
Authority: CN
Inventors: C.格斯; R.斯玛克; S.凯勒
Original assignee: Groz Beckert KG
Current assignee: Groz Beckert KG
Priority date: 2017-05-22
Filing date: 2018-05-22
Publication date: 2022-03-04
Anticipated expiration: 2038-05-22
Also published as: JP7139149B2; CN108930084A; EP3406772B1; EP3406772A1; JP2018197418A

Abstract

The invention relates to a frame plate for a high-speed weaving machine, which has a main body, a reinforcing bar and a damping band. The frame plate is characterized in that the main body forms, together with the reinforcing bar, an accommodation space in which the fastening elements of the damping band are accommodated.

Description

Frame plate and heald frame

Technical Field

The invention relates to a frame plate for a high-speed weaving machine having a main body, a reinforcing bar and a damping band, a frame plate for a high-speed weaving machine having a main body and a reinforcing bar, and a heald frame having a frame plate.

Background

Many types of frame plates for heald shafts are known. Extruded hollow profile bars made of aluminum are now frequently used as the main body of the frame plate. Additional parts, such as heald carrying bars, guide elements, drive elements, parts for attaching side supports and the like are usually attached to these aluminium profiles. In the case of frame plates for particularly fast weaving machines, stiffening rods, for example carbon fiber rods, and damping strips made of plastic (serving as stop elements for loosely arranged heddles) are also known.

DE 10206130B4 shows a damping strip which is clamped firmly to an aluminum frame plate or another intermediate profile. There are no stiffeners.

DE 19962977a1 shows a damping strip which is fixed, for example, with an adhesive. The reinforcing rods are not shown in this publication.

EP 2669413a1 shows a heddle frame for a high-speed weaving machine, which heddle frame has both a reinforcing rod and a damping strip. The damping band is fitted into or around the reinforcing rod and is held there by a form fit with little play. However, the reinforcing rods and/or dampers shown in EP 2669413a1 are provided with a large number of filaments. Due to their small size and narrow radius, they cannot be manufactured reproducibly or sufficiently reproducibly using conventional methods. In fact, these problems lead in particular to failure of the reinforcing rods or of the damping strips. Due to the limited installation space, no possibility was found for at least one of the two fittings to anchor the two fittings via a positive lock without involving a risk of breakage.

Disclosure of Invention

The object of the invention is to propose a frame plate which has integrated stiffening rods and damping strips in the available installation space and which is sufficiently strong for both.

This object is achieved by means of a frame plate having a main body, a reinforcing bar and a damping band, the main body together with the reinforcing bar forming an accommodation space in which fastening elements of the damping band are accommodated. The accommodation space, which is bounded together by the body and by the reinforcing rods, makes the most possible use of the available installation space. As defined in the present invention, a stiffener is an element attached to a body, the main function of which is to increase the bending stiffness of the body. The heddle support bar also tends to increase the bending stiffness of the main body considerably, but the main function of the heddle support bar is to hold the heddle frame. For this reason, only very wear-resistant materials can be used for the heddle support bar, and these materials are usually made of hardened steel. From the prior art, for example, harness carrying bar fastening elements are known which, as a side effect, can increase the bending stiffness of the body. Such elements are also not reinforcing rods in the sense of the present invention, but they are also made of a material different from that of the reinforcing rods.

The body of the frame plate is preferably an extruded hollow profile bar made of aluminium and/or light metal alloys having various functions. For example, the harness support bar may be attached to a cavity-free extension of the main body. The connection to the side support may be received within the lumen at both ends of the side support. All elements for fulfilling this basic function form a body, also in the case of a multi-part embodiment. The body configured as a frame plate according to the invention makes it possible to attach stiffening rods that increase the bending stiffness of the plate and to form, together with such stiffening rods, an accommodation space for the damping band.

Hitherto, the reinforcing rods have been geometrically configured to be easily attachable to the body in a manner that is most conducive to increasing the bending stiffness of the body and as described, for example, in EP 2669413a 1. As will be described in detail later, the reinforcing bar also has geometrical features, such as projections, by means of which an accommodation space for the damping band is formed. In addition to its main function of increasing the bending stiffness of the frame plate, the reinforcing bar has the additional function of forming, together with the main body, an accommodation space for the damping band. In particular, the stiffening rod is preferably not intended for fastening the heddle support bar to the main body. The damping strip is preferably an extruded plastic profile. In an advantageous embodiment, the main body, the reinforcing bars and preferably also the damping strips extend over the entire length of the frame plate.

The installation space available for the heddle frames is limited in the transverse direction by the pitch of the heddle frames in the weaving machine, which is typically 12mm per heddle frame. For this reason, the main body of the frame plate typically has a maximum extension in this direction of about 10mm or less. The hollow cavity profile of the body, which is extruded in most cases, defines the directions on the body and the frame plate as follows: the direction of extension of the constant section of the hollow cavity profile produced by the extrusion die is the longitudinal direction; at right angles to the longitudinal direction, the extension of the profile in the transverse direction is limited to a maximum of about 10 mm. The direction perpendicular to both of the above directions is the height direction. Due to the optimum utilization of the installation space, a receiving space is formed into which the fastening elements of the damping band fit, which are both strong and reproducibly manufactured. Furthermore, the reinforcing profile can be constructed with fewer filaments than in the prior art and is therefore also sufficiently strong.

The fastening means are preferably held in the receiving space by means of a form fit, so that an additional element for fastening the damping band to the frame plate becomes unnecessary.

The fastening element is preferably accommodated in the accommodation space with play. This enables the damping strip to be easily sucked into the receiving space, for example from the side, in the longitudinal direction.

In an advantageous embodiment, the receiving space has an opening through which the fastening element of the damping strip can be interlocked with the receiving space. Furthermore, it is preferred if the inner width of the opening is smaller than the inner width of the interior of the receiving space, wherein according to the invention both the inner width of the opening and the inner width of the receiving space are defined, one inner width being defined by the main body and the other by the reinforcing bar. The undercut for the fastening element can be formed in this way. The undercut is typically a design feature: i.e. prevented from separating from the second part by means of a projection or enlargement on one part, because the second part surrounds an open cavity or accessible space in which the projection or enlargement of the first part cannot be removed from the open cavity or accessible space without damage or deformation. The fastening elements may then interact with the undercuts, thereby attaching the damping strip to the frame plate. For this purpose, the fastening element can be constructed with a curvature, the wall thickness of which remains approximately the same. Its angular configuration makes the fastening element wider compared to its simple wall thickness. This prevents it from falling out of the receiving space, since the fastening element is wider than the inner width of the opening of the receiving space due to its angular configuration. The undercut may also be formed by the design of the reinforcing bar, by the shape of the body, or by both. For example, the body may be provided with a protrusion by means of which the inner width of the opening is reduced compared to the inner width of the receiving space. At least a part of such a protrusion will extend in the lateral direction against the extension of the body in the height direction. Similarly, the projections extending like this may additionally or only be present on the reinforcing bar.

The receiving space may have at least one boundary surface extending at an acute angle with respect to a height direction of the body and a lateral direction thereof. Such a boundary surface enables the damping band to assume a preferred orientation relative to the frame plate even if the fastening means are accommodated with play in the accommodation space.

The boundary surface for the receiving space formed by the body may extend only in the height direction, so that the body has a maximum weight-saving configuration.

A frame plate for a high-speed loom has a main body and a reinforcing bar. The frame plate is characterized in that the body forms, together with the reinforcing bar, an accommodation space in which the fastening elements of the damping band can be accommodated. A suitably adapted damping band can be introduced reversibly or be replaced if necessary and replaced with a new damping band.

The reinforcing rods may be constructed of a material having a higher bending stiffness than aluminum or its alloys; preference is given to using fibrous materials, particularly preferably carbon fibers, which are incorporated in a matrix. Each material having a higher bending stiffness than the body is preferably lower in density than the body and may be firmly joined to the body, for example by bonding, which may be advantageous to use. In particular, the reinforcing rod is not an intermediate profile which is used only for fastening the damping element but which does not meet the aforementioned reinforcement requirements. With respect to these requirements, the nature and manner of attachment to the body is also important. In the case of the preferred embodiment, a large-area, at least double-sided, bonded joint is present in the cavity of the body.

Drawings

Fig. 1 shows a sectional view parallel to the longitudinal direction of an embodiment of a frame plate.

Fig. 2 shows an enlarged detail from fig. 1.

Fig. 3 shows a sectional view from fig. 2, in which the damping strip has been displaced in the height direction.

Fig. 4 shows a further embodiment of the frame plate in a view similar to fig. 1.

Detailed Description

Fig. 1 shows a sectional view parallel to the longitudinal direction L of an embodiment of a frame plate 1. Apart from the heddle support rail, no parts which are of no importance for the invention, such as guide elements, are shown in this sectional view. Only glue lines are shown at the bonding sites and a further simplification is made that do not directly interact with the invention. The stiffening rod 3 and the damping strip 4 have been attached to the body 2 close to the heddle support bar.

Fig. 2 shows an enlarged detail from fig. 1. The reinforcing rods 3 and the damping strips 4 are particularly well recognized here. For its extension, the reinforcing bar 3 is surrounded by the body 2 from three sides. At its lower end, the reinforcing bar 3 has a transverse projection. The damping strip 4 has a hollow body portion and extends therefrom with a fastening element 6, which extends substantially in the shape of the number "7". The fastening element 6 is thus widened in the transverse direction Q and is held in the receiving space 5 in a form-fitting manner. The projections on the reinforcing bars 3 form acute angles with the height direction H and the transverse direction Q. The fastening elements 6 extending from the damping strip 4 are in contact with the respective inclined surfaces and with the boundary wall extending in the height direction H formed by the body 2. It is evident that in this view there is still a space above the fastening element 6 in the receiving space 5. In other words, the fastening element 6 is accommodated in the accommodation space 5 with some free play. It is also evident that the fastening element 6 is held in the receiving space 5 by means of a positive fit and cannot fall down from the receiving space 5 in this figure. Due to its curved shape, the fastening element 6 is wider than the internal width W of the opening 7 of the receiving space 5.

The opening 7 of the accommodating space 5, the inner width of the opening 7, and the inner width Wa inside the accommodating space 5 are more easily recognized in fig. 3. For giving a better view, fig. 3 shows a detail of fig. 2, but with the damping strip 4 displaced downwards in the height direction H. The internal width W of the opening 7 and the internal width Wa inside the accommodating space 5 are indicated by arrows. It is apparent that the arrow representing the inner width Wa inside the accommodating space 5 is longer than the arrow representing the inner width W of the opening 7. In this way undercuts are produced by the projections on the reinforcing bars and the body of the frame plate, thereby enabling the damping band 4 to be attached by means of its fastening elements 6.

Fig. 4 shows a view of another embodiment of the frame plate 1, which view is similar to the view of fig. 1. Unlike the first embodiment, all boundary walls of the accommodation space 5 extend in the height direction H or the lateral direction Q. Here too the damping band has a hollow body part. The fastening elements extend at an angle of about 90 °. The angled part of the fastening element 6 is held in the receiving space 5 by means of a positive fit.

Claims

1. A frame plate (1) for a high-speed weaving machine having a main body (2) and a reinforcing bar (3), characterized in that the main body (2) forms together with the reinforcing bar (3) an accommodation space (5) in which a fastening element (6) of a damping strip (4) can be accommodated, the fastening element (6) being held in the accommodation space (5) by means of a form fit.

2. The frame plate (1) according to claim 1, characterized in that the frame plate (1) also has a damping band (4).

3. Frame plate (1) according to any of the preceding claims, characterized in that the fastening element (6) is held with play in the accommodation space (5).

4. The frame plate (1) according to claim 1 or 2, characterized in that the internal width (W) of the opening (7) of the housing space (5) is smaller than the internal width (Wa) inside the housing space (5), thereby forming an undercut for the fastening element (6).

5. Frame plate (1) according to claim 1 or 2, characterized in that the fastening elements (6) are configured with a curvature, the wall thickness of which remains substantially the same.

6. The frame plate (1) according to claim 1 or 2, characterized in that the receiving space (5) has at least one boundary surface extending at an acute angle with respect to the height direction (H) of the body (2) and with respect to the transverse direction (Q).

7. The frame plate (1) according to claim 6, characterized in that the boundary surface for the receiving space (5) formed by the main body (2) extends only in the height direction (H).

8. Heald frame with a frame plate according to any one of the preceding claims.