CN1393686A

CN1393686A - Apparatus for measuring improvement of yarn mechanical tension in equipment of weaving system, etc.

Info

Publication number: CN1393686A
Application number: CN 02118583
Authority: CN
Inventors: R·卡斯泰利
Original assignee: LGL Electronics SpA
Current assignee: LGL Electronics SpA
Priority date: 2001-04-27
Filing date: 2002-04-26
Publication date: 2003-01-29
Anticipated expiration: 2022-04-26
Also published as: DE60207776T2; ITTO20010060U1; DE60207776D1; ITTO20010060V0; EP1253099B1; CN1211649C; EP1253099A2; EP1253099A3

Abstract

The device comprises a couple of thread guide eyelets that are spaced on a rectilinear support (X) and a sensor (S) placed between said eyelets, external to the rectilinear support, under the pressure of the yarn running from one eyelet to the other, thereby defining two path segments reciprocally inclined at a predetermined angle ( alpha ). The thread guide eyelets (O'1-O'2) are inclined in opposite directions with respect to the rectilinear support (X), so that the yarn (F) passes diagonally through the eye of each thread guide eyelet; and the inclination of the eyelets with respect to the support (X) is chosen so that contact arises between the yarn and two points (C1-C2) of each eyelet, whereby the inclination of the path segments (T1-T2) of the yarn in the spans between the eyelets and the sensor (S') is kept constant.

Description

The improved device of the mechanical tension of the yarn of measurement in equipment such as weaving system

Technical field

The present invention relates to the improved device of the mechanical tension of the yarn of a kind of measurement in equipment such as weaving system, relate in particular to a kind of can the generation and the measurement mechanism that acts on the proportional simulating signal of mechanical tension on the monitored yarn.This analog passband signal is commonly used for the feedback in the control circuit of thread brake, thereby makes the mechanical tension in the yarn keep constant.

Background technology

In order to measure the mechanical tension of yarn, known and used various devices, they comprise sensor or the piezoelectric sensor of being made up of strain gauge usually, the yarn of straining between two yarn guides is exerted pressure to sensor, yarn guide appropriate intervals on a linear support part is left, and described sensor is between two yarn guides.

Fig. 1 in the accompanying drawing has clearly illustrated a kind of known measurement mechanism, and a sensor S is positioned at the outside on plane, linear bearings X place, two yarn guide O ₁And O ₂Be bearing on the linear bearings X, yarn F leans against on the described sensor and departs from a straight line path, also forms its summit and leans against dog leg path on the sensor S, and at sensor S place, adjacent route segment forms an angle α.

In order correctly to measure the mechanical tension in the yarn, the described angle α at place, thread path summit has predetermined value, and this is worth from yarn and yarn guide O ₁And O ₂Some a and the tangential of b contact.In addition, this value must be constant during work at device, yet, because unexpected move or incorrect layout makes yarn be moved upward to an A and B with contacting of yarn guide, thereby change described angle α.

Summary of the invention

Fundamental purpose of the present invention is the known devices of improving among Fig. 1, prevent that yarn from leaning against any change of the angle α that forms on the sensor, and provide a kind of to the correct of the mechanical tension in the yarn with measure reliably, and irrelevant with deliberate reason with the anything unexpected of not wishing the variation that occurs or wrong deflection that may cause angle α.

In fact, the present invention is based on a kind of like this innovation thinking: two relative linear bearings of yarn guide are tilted along opposite direction, thereby make the yarn hole by each yarn guide diagonally, keep in touch along the opposite point of diametric(al) with two of the centrosymmetric yarn guide of relative yarn guide simultaneously.The inclination of described route segment preferably equals cornerwise inclination in the hole on the corresponding yarn guide, and diagonal line connects described yarn contact point.

The objective of the invention is to be achieved through the following technical solutions, the device of the mechanical tension of the yarn of a kind of measurement in equipment such as weaving system is provided, it comprises apart from one another by ground and is arranged on a pair of yarn guide and the sensor between described yarn guide on the linear support part, described sensor is outside linear bearings, when yarn sensor when a yarn guide moves to another yarn guide is subjected to the pressure of yarn, and yarn is defined as two route segments that are inclined to a predetermined angle α in opposite direction, wherein, the relative linear bearings of described yarn guide tilts in opposite direction, passes the hole of each yarn guide with making the yarn diagonal line; Wherein, select the inclination of the relative supporting member of yarn guide, make yarn and each yarn guide along 2 opposite contacts of diametric(al), the center of these 2 relative yarn guides is symmetrical, the inclination of the route segment of the yarn in the scope between each yarn guide and sensor keeps constant thus, therefore, the angle α between the described route segment also remains unchanged, and with in the introducing of the yarn of described yarn guide upstream and downstream with draw orientation independent.

In described device, the pitch angle of each route segment equals cornerwise pitch angle in the hole of corresponding yarn guide, and this diagonal line connects described two contact points of yarn and yarn guide.

In described device, described each yarn guide is connected with described linear bearings by each locking hinge, thereby allows the pitch angle of the described relatively supporting member of described yarn guide to be conditioned.

Description of drawings

In addition, by following detailed introduction with can more clearly understand purpose and advantage with reference to the accompanying drawings, wherein according to modifying device of the present invention:

Fig. 1 is the synoptic diagram of described known devices;

Fig. 2 is the synoptic diagram that is similar to Fig. 1, and it has shown the improved device as the object of the invention;

Fig. 3 is the partial enlarged drawing of Fig. 2.

Embodiment

As shown in Figure 1, pass two yarn guide O of known devices D ₁And O ₂Yarn F abut against on the sensor S between the described yarn guide, thereby form the route segment T comprise two inclinations ₁And T ₂The broken line path, this two route segment and some a and b in each yarn guide that tilts is tangent, and in the connection of sensor S place, thus formation angle α.

Fig. 1 can see by examination, if the contact region of route segment and each yarn guide moves to the some A and the B of yarn guide in the device course of work, no matter is to be unexpectedly unexpectedly or not, described route segment will with corresponding phantom line segments T ₁' and T ₂' alignment, thus angle α, the corresponding change of the measuring-signal se of sensor S generation then caused.

For fear of this defective, the invention provides a kind of modifying device D ' as shown in Figure 2, it comprises the yarn guide O of two relative linear bearings X inclined in opposite directions ₁' and O ₂', like this, yarn passes the hole of each yarn guide along diagonal line, keep simultaneously on centrosymmetric, the yarn guide with relative yarn guide along 2 opposite C of diametric(al) ₁And C ₂Contact (Fig. 3).The inclination of the relative supporting member X of yarn guide preferably can be passed through each lockable articulated linkage CE ₁And CE ₂Regulate, and can select, so that described some C in yarn and the yarn guide ₁And C ₂Contact.Its starting point is to remain on the thread path section T in the scope between each yarn guide and the sensor S ' ₁And T ₂Inclination constant.In addition, described route segment T ₁And T ₂Inclination preferably equal the inclination (Fig. 3) of diagonal line d in the hole of corresponding yarn guide, this diagonal line connects described contact point C ₁And C ₂

By such layout, can obtain two thread path section T in the scope between sensor S ' and two yarn guides according to described purpose ₁And T ₂Constant pitch angle, and with the yarn guide upstream and downstream, with the slip of yarn relevant yarn introducing and draw orientation independent.

Certainly, the effect of this pattern may extend to can reach same effect with the pattern of using identical innovation thinking.

Claims

1. the device of the mechanical tension of the yarn of a measurement in equipment such as weaving system, comprise apart from one another by ground and be arranged on a pair of yarn guide and the sensor between described yarn guide (S ') on the linear support part (X), described sensor is outside linear bearings, when yarn sensor when a yarn guide moves to another yarn guide is subjected to the pressure of yarn, and yarn is defined as two route segments that are inclined to a predetermined angle α in opposite direction, it is characterized in that described yarn guide (O ₁', O ₂') relatively linear bearings (X) tilt in opposite direction, pass the hole of each yarn guide with making yarn (F) diagonal line; Wherein, select the inclination of the relative supporting member of yarn guide (X), make yarn and each yarn guide along two opposite point (C of diametric(al) ₁, C ₂) contact, this 2 point (C ₁, C ₂) relatively the center of yarn guide be symmetrical, the route segment (T of the yarn in the scope between each yarn guide and sensor (S ') thus ₁, T ₂) inclination keep constant, therefore, the angle d between the described route segment also remains unchanged, and with at described yarn guide (O ₁', O ₂') introducing of the yarn of upstream and downstream and draw orientation independent.

2. device as claimed in claim 1 is characterized in that, each route segment (T ₁, T ₂) the pitch angle equal the pitch angle of diagonal line (d) in the hole of corresponding yarn guide, this diagonal line connects the described two contact point (C of yarn and yarn guide ₁, C ₂).

3. device as claimed in claim 1 or 2 is characterized in that, described each yarn guide (O ₁', O ₂') by each locking hinge (CE ₁, CE ₂) be connected with described linear bearings (X), thereby allow the pitch angle of the described relatively supporting member of described yarn guide (X) to be conditioned.