JPS61296170A - Clip chain link of fabric tenter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The invention relates to a flap with an edge mounted pivotably relative to a clip table fixed to the clip body, and a detection device coupled to the flap. A clip chain link for a fabric presenter, comprising a roller and a locking pawl arranged on the clip body and having a protrusion 2 projecting in the direction of the flap, the flap being arranged on the upper section of said protrusion. of a type configured to support an appendage of.

PRIOR ART The term "weaving machine" in the context of the present invention refers to a span-and-reckmaschne machine for processing all kinds of textile fabrics and sheets.
).

German Patent Application No. 30 26 910 (2003) describes a clip for a drawer, in which a pin bar for pin bar operation and a detection roller with a flap for clip operation are also provided. There is. In order to avoid undesirable effects of mechanical vibrations on the flap edges and flap bearings during pin operation or during return travel during clip operation,
In this known design, the locking pawl is in the form of an arcuate part with a projection projecting in the direction of the flap, such that the flap is locked in the upper section of the projection with the boss of the additional part, in particular the assigned detection roller. It is considered that the clip table is placed between the clip table and the wall of the clip body.

The generally inelastic locking pawl known from DE 30 26 910 mentioned above is elastically supported, so that when the flap is pivoted together with the extension, the upper section of the projection is It can be locked with some engagement on top, but unlocking requires a special auxiliary roller acting on the locking pawl. Another disadvantage of the known device is that the locking stability of the working position of the flap is only sufficient if the pin bar is swiveled into the non-active position, i.e. in the feed run in clipping operation, and the clipping During the return run during operation, consideration is given to a significantly weaker lock in order to facilitate unlocking when transitioning from the return run to the forward drive stage. Therefore, slight manufacturing errors in the shape and/or fixation of the locking pawl can lead to unintentional release of the lock, which can lead to severe damage to the edge, since the duration of the clip in the working position during clip operation This is because the driving time also lasts longer than the - driving time.

The flap with edges is supported on the tension clip in such a way that the flap tends to fall towards the clip table only under its own weight. If the falling velocity in each case is too low for timely fixing of the fabric selvedge inserted between the flap and the table, the flap may additionally be fitted with, for example, a pressure spring (see German Patent Application No. It may be advantageous to apply a preload in the direction of the clip table with the help of a 2767091 patent. The locking pawl known from German Patent Application No. 3,026,910 mentioned above is non-elastic and, because of its shape and fixing type, can at the same time be constructed as a member which preloads the flap in the direction of the clip table. Can not.

Problem to be Solved by the Invention It is an object of the invention to be constructed of as few individual parts as possible without interfering with the movement of the flaps located close to the clip table or in the closing direction of the clip. A slight pressing force can be applied to the flap, ensuring locking and unlocking without the need for special auxiliary parts related to use in clipping and locking operations, and low friction even in the locking range. It is an object of the present invention to provide a locking device for the flap in the working position, which ensures operation.

Means for Solving the Problem The means of the present invention for solving the above-mentioned problems is such that a lock pawl in the form of a leaf spring having a protrusion is fixed to the clip body only at the end opposite to the clip table. and the other free end of the leaf spring that comes into contact with the clip body when the leaf spring is pressed down is configured to be pivotable relative to the stopper. .

Embodiment In order for the leaf spring to perform its predetermined function, the rest position of the leaf spring is the amount that the flattened attachment part is inserted into the virtual turning circular orbit so that the clip overlaps the free end of the leaf spring. It is advantageous if consideration is given to making it smaller than This ensures that when the protrusion is pushed down for locking, the free end of the leaf spring exerts maximum restoring force against the stopper location on the clip body, and the leaf spring exerts maximum restoring force against the additional part that presses down on the protrusion. abutment is achieved such that unlocking is possible only by applying this large force. The same spring therefore exerts a comparatively small restoring force on the flap when the flap has a small displacement, and a several times greater restoring force in connection with locking and unlocking when the flap has a large displacement. In other words, the flap can be moved relatively easily against the spring force in the range close to the tightening position, but can only be moved beyond the protrusion apex by using significant force in the locking range. Can be rotated.

When the flap pivots against the spring force, a certain amount of friction occurs between the flap extension and the leaf spring. lJ
In the clip operation of the unloading machine, each clip must be locked and unlocked once each time the chain circulates, so the rotation speed is 200 m/min (target) and the machine length is 20 m1, or the chain length is approximately 43 m. In this case, an opening/closing movement of 5 degrees per minute takes place, ie the extension of the flap passes over the protrusion of the leaf spring 10 times per minute. In two-shift operation, the bridge passes approximately 100[]O times a day, or approximately 2,000,000 times a year. It is clear that unless measures are taken to reduce the friction, wear will occur in this location I in a short time. According to another embodiment of the invention, the friction between the appendage of the flap and the protrusion of the leaf spring is such that during the pivoting movement the flap hits the leaf spring with the rotating boss of the wheel β or the detection roller. This can be reduced by doing this.

The clip chain link according to the invention can have, in addition to an edged flap with detection rollers for clipping operation, a pin bar for pimping operation. In clip operation, the flaps are locked or unlocked once per cycle, but in pin operation, the flaps only need to be locked and unlocked once at the start and end of the operating state.

(9) ・
- An exemplary embodiment The tensioning clip shown in FIG. 1 consists of a clip body 1 having a clip table 2 fixedly attached thereto and a support arm 3 for an edged flap 5; It is equipped with The flap 5 is mounted on the support arm 3 so as to be pivotable about the axis 4 . The clip body 1 consists of a chain (
(not shown) in sliding bearings 8, 9 by two sliding plates 6, 7. In addition, a roller 10 supported by a ball bearing is fixed to the clip body.
The rollers 10 are displaced along the guide rail 13 under the effect of the tension in the direction indicated by the arrow 12, which is exerted by the tightened fabric 11 during the feed run of the chain. The guide rail 13, like the sliding bearings 8 and 9, is fixed to the machine frame within a holding member 14. In the clip operation, the fabric 11 is clamped between the edge 15 of the flap 5 and the clip table 2, and in the pin operation, it is pierced by the pin 16 of the pimper 17, which is pivoted forward from a ready position below the chrysozotable. It looks like this.

Furthermore, the flap 5 supports a detection roller 18 rotatably mounted at its lower end. The detection roller 18 is arranged in a conventional manner on the side of the edge 15 opposite to the woven fabric 11.
placed at a distance from. According to FIG. 4, the detection roller 18 consists, for example, of a rotatably mounted hub 19 and two wheels 20 fixed thereto.

Opposite the two wheels 20, the clip table 2 is each provided with a slit in a known manner, so that when there is no part of the fabric 11 to be processed between the wheels 20 and the clip table 2, The wheels can project into the clip table as shown in dotted lines in FIG. Woven fabric 11 placed on clip table 2
Grasping of the flap 5 by the edge 15 with approximately the same line width is achieved in a conventional manner by means of a detection roller.

According to the invention, the leaf spring 21 is fixed to the clip body 1 with one end 22. The clip body 1 is usually made from a light metal, for example aluminum, whereas the leaf spring 21 is of course made from steel. In the exemplary embodiment, the plate extends from the fixed end 22 essentially from top to bottom in the direction of the clip table 2. The leaf spring 21 has a projection 23 in the central region which, in the relaxed state of the leaf spring, is drawn by the detection roller 18 and the boss 19 when the flap 5 pivots about the axis 4. The vehicle is entering the virtual turning orbit.

Details will be explained with reference to FIGS. 2, 3, and 4. The leaf spring 21 has an upper section 25 of a projection 23 fixedly connected to the clip body 1 at a fixed end 22;
It consists of a top and a lower section 27 terminating in a free end 26 .

The leaf spring first extends in the upper section 25 from the fixed end 26 to approximately the edge 1 of the clip table 2 and the flap 5.
5 extends in the direction of area 28. The leaf spring has an angle of the order of 90° in the relaxed state at the projection 23 such that the lower section 27 is in the relaxed state and the clamping of the clip table is directed towards the trailing edge 29 opposite the area 28.
It has a curved part. The free end 2 of the leaf spring hits the stop area 30 of the clip body 1 when the leaf spring is pressed down.
6 may be bent.

When the flap 5 is in the working position according to FIG. 1, the leaf spring 21 has no influence on the operation. However, when the flap 5 is lifted from the clip table 2 to remove the tightened fabric 11 or to pinch the fabric 11, the movement of the flap 5 can be selectively controlled by the clips as shown in FIG. Either within a range generally sufficient to pinch the leaf spring 21, and also without influence from the leaf spring 21, or within the same range, as shown in FIG. can be applied to the flap. To do this, the lower section of the projection must be bent in such a way that it does not come into contact with the corresponding abutment on the flap side within the above-mentioned slight swiveling range, or the lower section must be bent so that it does not come into contact with the corresponding abutment on the flap side even within this swiveling range. As shown in Figure 3, bend it so that it touches the above contact part. The theoretical relaxed state of the lower section is shown in FIG. 3 at 27'.

In clip operation, the flap 5 must be locked at a distance from the clip table 2 during return travel, and generally in pin operation, the edge 15 and the tightening area 28 must be locked at a distance so that a collision with the area 28 never occurs. The flap 5 is moved by a force exerted from the outside, for example via a slide rail, in such a way that the leaf spring 21 and in particular the projection 23 are pushed back a certain distance in the direction of the clip body 1 and the leaf spring is then tightened. It is rotated about a shaft 4 supported by a support arm 3. When the flap passes upwardly over the projection 23, the leaf spring 21 relaxes again and returns until the upper section 25 is firmly in contact with the abutted extension of the flap 5. In this movement, the leaf spring 21, both in the configuration of FIG. 2 and in the configuration of FIG. 3, initially exhibits a relatively small resistance to the pivoting movement. After the free end 26 abuts the clip body 1, the situation changes. From this point on, the free end 26 can no longer be seen as completely freely movable, and the spring properties are equal to that of a spring that is tightened on one side and loosely in contact on the other end.

In the case of FIG. 3, even in the operating position the free end 26 or the lower section 27, which is pressed against the extension of the flap, exerts a force on the flap 5 in the direction of the tightening area 28. The force of gravity, which is often used for closing, is supported by this spring force.

According to FIG. 4, which is a schematic cross-sectional view taken along the line AB in FIG. 1, the leaf spring 21 comes into contact with the wheel 20 of the detection roller 18 or the boss 19. In both cases, when the flap 5 pivots into contact with or away from the leaf spring, it moves along the leaf spring 21, in particular on the protrusion 2.
3, for which the detection roller 18
There is relatively little wear.

Since the boss 19 of the detection roller 18 does not need to have exact dimensions for other operations, it is advantageous if the boss 19 rather than the running surface of the wheel 200 rolls along the leaf spring 21 when turning.

According to the invention, all the means for locking and optionally pushing the flap consist of a single, modified, leaf spring which is fixed to the clip body only at one end.

The leaf spring has an approximately nose-shaped projection in cross section and is connected to the clip body only at the upper end of the upper section of the projection, for example by a screw. Starting from the fixed end, the upper section first extends to the top of the projection approximately in the direction of the part of the clip table with which the edge contacts, as the case may be. At this point, the leaf spring has a relatively strong curvature (small radius of curvature), and the clamping of the clip table generally extends in the direction of the clip body part adjacent to the rear end on the opposite side of the range. There is. At this free end, the leaf spring can be bent. The shape of the leaf spring and especially the shape of the protrusion as well as the elasticity and stability of the leaf spring are determined by
When the locking extension of the flap is pivoted into contact with or away from the leaf spring, the leaf spring is pressed down under the action of a force such as a push rod acting on the flap and thus passes through the projection. It must be selected such that it can be held in a locking position on the upper section sufficiently and without the application of special forces. Stability is also ensured at the point of change of direction of the clip chain at the longitudinal end of the drawer, where a relatively large centrifugal force acts on the flap, but the lock does not accidentally come off. It must be sized like this.

According to the invention, the lower free end of the leaf spring is placed against the point on the clip body against which the free end is pressed when the protrusion of the leaf spring is pressed down, i.e. when locking and unlocking. In the relaxed state, they are located at a fixed distance. Therefore, the free end of the plate has a relatively small restoring force unless it is in contact with the clip body,
In addition, in approximately this state, a correspondingly small pressing force is exerted on the additional portion of the flap that is in contact with the leaf spring. This small spring force does not become an impediment when the selvage of the fabric is pinched or removed, and can be used to support the closing movement of the flap when pinching the fabric. Therefore, in conventionally known clips, two devices are required for this purpose:
That is, regarding the two functions required by the lock pawl and the push spring, the leaf spring according to the invention fulfills these two functions at the same time.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a cross-sectional view of the drawer clip according to the present invention;
3 and 3 respectively show two embodiments of leaf springs disposed opposite to the detection roller, and FIG. 4 is a longitudinal sectional view of the detection roller. 1...Clip body, 2...Clip table, 3
... Support arm, 4... Axis, 5... Flap, 6
゜7... Sliding plate, 8, 9... Sliding bearing, 10
...Roller, 11...Woven cloth, 12...Arrow, 13
...Guide rail, 14...Holding member, 15...Edge, 16...Bin, 17...Pimper, 18...
・Detection roller, 19...Boss, 20...Wheel, 21
... leaf spring, 22 ... end, 23 ... protrusion, 2
4... Virtual turning circular orbit, 25... Upper section, 26.
... End, 27 ... Lower section, 28 ... Tightening range, 29 ... Trailing edge, 30 ... Stopper range.

Claims (1)

[Claims] 1. A clip table (1) fixed to the clip body (1);
a flap (5) with an edge, pivotably supported relative to 2), a detection roller (18) connected to the flap (5), and arranged on the clip body (1); A clip chain link for a fabric cloth drawer, comprising a locking pawl with a projection projecting in the direction of the flap (5), such that the extension of the flap is supported on the upper section of said projection. In the constructed version, a locking pawl in the form of a leaf spring (21) with a projection (23) is located at the end (2) opposite the clip table (2).
The other leaf spring (21) is fixed to the clip body (1) only at 2) and comes into contact with the clip body (1) when the leaf spring (21) is pressed down. A clip chain link of a textile cloth centering machine, characterized in that the free end (26) is configured to be pivotable relative to the stop. 2. The distance between the free end (26) of the leaf spring (21) in the relaxed position and the stopper location on the clip body (1) is such that the protrusion (23) of the leaf spring (21) in the relaxed position is close to the flap (5). )
Clip chain link according to claim 1, which extends radially into the maximum orbit (24) of the appendage when it pivots. 3. The free end (26) of the leaf spring (21)
2. A clip chain link according to claim 1, wherein the clip chain link is configured to press against the appendage of the flap in the tightened position of the clip. 4. Detection roller (18) as an additional part of the flap (5)
) is provided opposite to the leaf spring (21) so that the peripheral surface of the leaf spring (21) rolls along the protrusion (23) of the leaf spring (21);
A clip chain link according to any one of claims 1 to 3.