JPS6183353A - Warp yarn tension regulator of loom - 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 Industrial Application] The present invention relates to a device for adjusting fluctuations in tension generated in warp threads due to opening/closing movements of warp thread rows.

[Conventional technology]

When the warp threads are interlocked to open and close, there is a non-adjustable method for weaving to deal with fluctuations in warp tension that occur in response to changes in the path length. An easing method is adopted in which the tension is changed by displacing the backrest roller for deflecting the warp threads toward the weaving section in synchronization with the opening/closing movement, thereby reducing the IJ. This easing method is broadly divided into passive easing and active easing.The former is a method in which the supporting arm of the bank crest roller is elastically held by an easing spring to cause the roller itself to respond to H force fluctuations, and the latter is a cam , the support arm is forcibly swung using a reciprocating drive mechanism such as a crank.

The passive easing method can achieve a good tension adjustment function by appropriately selecting the spring characteristics of the easing spring, but as the rotation speed of the loom increases, it becomes difficult to achieve synchronization with the opening and closing movement. , active easing methods are being adopted in high-speed looms. However, since there is no buffer member such as an easing spring in the active easing method, warp threads with a small elongation rate may break, or the quality of the woven fabric may be impaired. A semi-aggressive easing method that combines both of these methods may be used.

〔problem〕

As mentioned above, it is ideal to select the appropriate easing method depending on the requirements such as the number of turns of stones set on the loom, the type of warp used, or the quality level required for the woven fabric. Since conventional looms are designed for one method, it is not easy to change this.

Therefore, an object of the present invention is to provide a tension adjusting device that can be easily changed between the above-mentioned methods.

[Means of invention]

The means of the present invention that solves the above problems constitutes a drive system that provides easing interlocking to the backrest roller from a rotary shaft that rotates in synchronization with the loom through a reciprocating drive mechanism and a link interlocking mechanism, and The stroke of the mechanism can be adjusted within a predetermined range from zero, and an easing spring can be interposed in one link element in the link interlocking mechanism.

[Effect]

According to the above means, each of the above methods can be easily selected.

That is, when the stroke of the reciprocating drive mechanism is adjusted to zero, the mechanism does not take any part in the easing movement, so a passive easing method using only the easing spring is configured, and when the stroke is adjusted to an appropriate value, the reciprocating interlocking movement is combined. A semi-aggressive easing method will be applied according to the above value. In this state, if the one link element is changed to a rigid one, the function of the easing spring is lost and a positive easing method is configured, and if the stroke is further reduced to zero, the above-mentioned no-adjustment method is obtained. .

〔Example〕

In Fig. 1, there is a backrest base attached to the rear and upper part of the frame of the 1-keel loom and the frame of the 2-keel loom, and 3 is the backrest holder attached to the inner surface of this base.
．． 2.3 are located on the left and right sides of the loom and form a pair. Reference numeral 4 denotes a yarn beam driven from the main shaft of the loom via a continuously variable transmission 5, and the warp yarns W sent out from the yarn beam 4 are guided by a guide roller 6 and then engaged with the backrest toe rough. After deflecting, the weft threads are driven in by the reed 9 while opening and closing are interlocked by the heddles 8 to form the woven fabric C, which is rolled up by the brace F roller 10 and wound around a cross roller (not shown).

Referring also to FIG. 2, reference numeral 20 denotes a cranking device as a reciprocating drive mechanism, the configuration of which will be described in detail later, and a connecting rod 21 of this device reciprocates in synchronization with the rotation of the loom. The length of the connecting rod can be adjusted using a turnbuckle.

31 is a transmission shaft supported by a pair of left and right frames 1, 32 is a first lever fixed to one end of this transmission shaft,
The tip of the connecting rod 21 is connected to the pin 32a at the free end. Therefore, the first lever 32 swings in synchronization with the rotation of the loom, causing the transmission shaft 31 to reciprocate. 33
A pair of left and right second levers are fixed upwardly to the transmission shaft 31, and these levers 33 are used to symmetrically configure the link system described below. , 34 has a core shaft 7 of the backrest roller 7 at one end thereof.
a backrest support arm fitted with a, 35 support shafts rotatably supported on the backrest holder 3, 36;
37 is a fork fixed to the inner end of this support shaft, and 37 is a connecting pin that connects the free end of this fork to the other end of the backrest support arm 34.
6 and the support arm type are connected in a chevron shape. Reference numeral 38 denotes a third lever branched downward from the backrest support arm 34, and a pin 38a at the free end of the lever 38 and a pin 33a at the free end of the second lever 33 are connected to an easing box 41. They are connected by a connecting rod 40.

Reference numeral 11 denotes a gear shift lever fixed to the outer end of the support shaft 35.
In conjunction with the speed selection lever 5a of the continuously variable transmission 5, a known tension sensing type warp feed 111 speed adjustment device is constructed.

FIGS. 3 and 4 show details of the cranking device 20, in which 22 is a rotary shaft that is rotated from the main shaft of the loom at the same speed as the main shaft of the loom, and a disc formed at the end of the rotary shaft. A shaft head 24, a screw hole formed axially symmetrically on one diameter line of the shaft head 24, a hole 25 is a disc-shaped crank board, a crank pin protruding from the center of this board, 27 and 27 are T slots formed along one diameter line of the substrate, and 28 and 28 are fastening bolts screwed into the screw holes 24 and 24 from these T slots.

The base end of the connecting rod 21 is supported by a crank pin 26 and held by a crank bin cover 29.

With the above configuration, the crank board 6 can be fastened to the shaft head B at any position on the 11h radius line, so (the eccentricity of the crank pin 26 with respect to the jj1 rolling shaft 22, and therefore the connecting rod The stroke to be applied to 21 can be adjusted within a predetermined range from zero.

FIG. 5 shows details of the connecting rod 40 of the easing box 41 (tl17), in which the connecting rod 40 is divided into members 40a and 40b, and the easing box 41 is constructed between these members.

In this easing box, 42 is a disk-shaped plunger that is apertured to the end of member 40a, and 43 is member 40b.
It is an integrated spring case.

This spring case has a cylindrical shape with a bottom, and slits (44) of a required length are symmetrically formed at the mouth of the spring case, and the plunger 42 is inserted into this mouth so as to face the bottom surface of the spring case 43. An easing spring 45 is interposed in the opposing portion.

46 and 46 are blades that are symmetrically protruded from the plunger 42 and pass through the slits 44 and 44 to the case 43.
It sticks out to the outside. 47, 47 are brackets protruding from the spring case 43 in correspondence with these blades, and the pair of blades 46 and brackets 47
Connect bolt nuts 49 and 4 through the connecting member 48.
9 allows for a rigid connection.

The embodiment is as described above, and the easing box 4
1 is made rigid as described above, the left and right second shafts l<-33 swing with the reciprocating rotation of the transmission shaft 31, and this swinging motion causes the connecting rod 40 and the third Lever 38
is transmitted to the backrest support arm 34 via the fork 36, which drives the support arm to swing around the connecting pin 37, displacing the backrest roller 7 diagonally up and down, thereby achieving an active easing method. be done. In this case, as shown in FIG. 1, when the opening amount of the warp threads W is maximum, the backrest roller 7 is displaced to the lowest position. The eccentric direction is determined.

In this state, the connecting member 4 of the easing box 41
If 8 is removed, the spring motion of the easing spring 45 is combined to obtain a semi-positive easing method, and in each of the above methods, if the rotation center of the crank pin 26 of the cranking device is made to coincide with that of the rotating shaft 22, each method is eliminated. A regulating scheme and a passive easing scheme are achieved.

In the embodiment, the connecting member 48 is used to make the connecting rod 40 rigid, but it is also possible to separately prepare a simple, rigid connecting rod that does not include an easing box and replace it with the connecting rod 40. You can also do this.

〔effect〕

As explained above, according to the present invention, each type of easing movement can be imparted by the simple operation of adjusting the stroke of the reciprocating drive mechanism and operating one link element, so that the rotational speed of the loom can be adjusted Optimal easing conditions can be set extremely easily depending on the species, etc.

[Brief explanation of drawings]

Fig. 1 is a side view of a loom to which one embodiment of the present invention is applied, Fig. 2 is an enlarged plan view taken along the line - - in Fig. 1, Fig. 3 is an enlarged sectional view of the main part of Fig. 1, and Fig. 4 5 is an enlarged cross-sectional view of another essential part of FIG. 1. FIG. 4... Yarn beam, 7... Backrest roller, Add... Reciprocating drive mechanism (cranking device), 2
1... Connecting rod, 22... Rotating shaft, 2
5... Crank group W, 26... Crank pin, 27
... T slot, 28 ... Fastening bolt, 31-40
... Link interlocking mechanism, 40... One link element (connection rondo) in the link interlocking mechanism, 41... Easing box, 45... Easing spring, 4
8... Connection member, 49... Connection bolt/nut,
W...Warp, C...Woven fabric.

Claims (1)

[Claims] A drive system is constructed that imparts easing motion to the backrest roller from a rotary shaft that rotates in synchronization with the loom through a reciprocating drive mechanism and a link interlocking mechanism, and the stroke of the reciprocating drive mechanism can be adjusted within a predetermined range from zero. Tonashi,
A warp tension adjustment device for a loom in which an easing spring can be interposed in one link element in a link interlocking mechanism.