JPS58132135A - Opening apparatus 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 The present invention relates to a shedding device for a rounding loom that weaves a plain weave, which is the most basic weave of textiles.

A conventional opening device of this type includes one shown in FIG. 1, for example. To explain this, the drive shafts 1. A crank 2, τ is attached to the crank 2.r, and the other ends of the connecting rods 3.
The opening shafts 4.4 are pivoted to driven levers 5.5' mounted on the shafts 4', respectively, for reciprocating angular movement of the aperture shafts 4.4. Then, each opening lever 6.6' is attached to the opening shaft 4.4,
By connecting this to the heald frame 8.8' via the opening roleper S, ct't turnbuckle T, τ, the heald frame 8.
．． 8' is moved up and down to perform an opening movement to form a shed.

However, in such a rank-type shedding device, the vertical movement of the heald frame 8.8' has a constant acceleration, so the shedding line becomes close to a sine curve, which is a problem when weaving filament fabrics. However, when it comes to spun fabrics, where the texture and texture greatly affect the quality of the 1 & ragatsu 9 woven fabrics, the opening amount between the upper and lower threads is usually adjusted to the warp tension during reed beating. By varying the tension, it is possible to create a difference in tension, but the crank method cannot do this and is therefore unsuitable for weaving spun fabrics.

In particular, in recent years in the textile industry, there has been an increase in the use of spun looms to weave filament yarns or filament looms to weave spun yarns. It was necessary to be able to change the aperture curve, and to be able to do this change easily and in a short period of time.

For this reason, some heald frames are made to perform shedding motion according to the profile of the shedding cams by using shedding cams equal to the number of heald frames.

However, such a cam-type shedding device has a structure in which 11 shedding cams are provided for one heald frame, so a loom that weaves a plain weave has at least two heald frames (usually 4 sheets), it is necessary to provide the same number of shedding cams, and a mechanism for transmitting the movement of the shedding cams to the heald frame may also be required. For this reason, the manufacturing cost of the shedding device becomes high, and a large space is required to store the shedding device in the loom.As a result, the loom becomes larger, and the installation area of the loom becomes larger. Problems such as a decrease in the number of units and a decrease in production volume were encountered. Furthermore, when adjusting the timing of the opening cams, adjustments must be made for the number of cams, which requires a long adjustment time and is cumbersome.

Therefore, in order to solve these conventional problems, there is a nine-opening device proposed by the present applicant in Utility Application No. 56-21430, but even with these four, at least two opening cams are required. However, there was still room for improvement.

The present invention has been made by focusing on such expressions,
This invention solves the problems of the conventional art by providing an aperture device exclusively for flat tissue that is constructed from a single aperture cam and has an extremely simple structure. That is, a camshaft that rotates 1/2 rotation per one rotation of the main shaft of the loom in conjunction with the loom, an opening cam attached to this camshaft, and a camshaft that is parallel to the camshaft and located at a substantially symmetrical position with respect to the camshaft. Two cam lever shafts are provided, and two cam levers are respectively attached to these cam lever shafts and abut on the opening cam at substantially symmetrical positions and swing as the opening cam rotates, The heald frame is moved up and down by transmitting the rocking movements of these cam levers to the heald frame via respective transmission means.

Hereinafter, the present invention will be explained based on illustrated embodiments.

2 to 4 show an embodiment of the present invention, in which a pair of brackets 12 are provided outwardly of the frame 11 of the loom.
1.12b are fixed by bolts 13 at a constant interval t-S. A hollow cam box 14 is fixed between these brackets (12a, 1, 2t), and a hole 15 is formed approximately in the center of both sides of the cam box 140.
A bearing 16 is fixed to. A camshaft 18 is rotatably supported on this bearing 16 via a bushing 1T such as an oilless bearing.

As shown in FIG. 4, an open cam 1s consisting of a matching cam is fixed in the middle of the camshaft 18, and a toothed pulley 20 fixed to one end of the camshaft 18 and a loom (not shown) are connected to the camshaft 18. A toothed belt (not shown) between the drive pulley and
is wound around the camshaft 18 and the opening cam 1@ to be rotated as the main shaft of the loom rotates. Here, the camshaft 18 is set to rotate 172 times for one rotation of the main shaft of the loom.

In the front, a pair of holes 21a are provided on both side plates of the cam box 140 at substantially symmetrical positions with respect to the axis of the camshaft 18.

21b is formed, and a cam lever shaft 23a is inserted into these holes 211.21b via a bush 22.

2-3b are each rotatably supported. L-shaped cam levers 248*24b are fixed to one ends of the cam lever shafts 23m and 23b in the cam box 14, respectively, and cam followers 25a are provided at both ends of each of these cam levers 24g and 24b.

25b, 25C, and 25d are rotatably mounted.

Here, the cam followers 25a and 254 are in contact with one cam 19 of the open cam 19 at a position offset by approximately 180', and the cam followers 25b and 25C are in contact with the other cam 19.
9t) at a position offset by approximately 180'.

Also, the cam box 1 of the cam lever shafts 23a, 23t)
Links 28g and 7fib are fixed to the other ends of the outside of 4, respectively, and one ends of links 28a and 28b are rotatably connected to the tips of these links 2611 and 266 via a pin 271P. Otori.

The tip of a link 3f11.301) fixed to the opening shaft 29M, 29b, which will be described later, is rotatably connected to the other end of 28b via a bottle 311. Link 30J here
1. Grooves 32 are formed on the tip side of 30b, and by inserting the above-mentioned bottle 31 into these grooves 32 so that the position can be finely adjusted and positioning the bottle 31 at an appropriate position, 33t-tighten the bottle 3.
1 is fixed, and by adjusting the position of the bin 31, the stroke amount (the opening amount of the warp threads) of the heald frame 341.34bC, which will be described later, can be adjusted.

The opening shafts 21a and 29b span both frames 11 of the loom, and are rotatably supported by bearings 35 fixed to the frames 11, respectively. In addition, 7 of the opening shafts 29a and 29b
Opening levers 36 and 36b are fixed on both inner sides of the frame 11, and rod ends 38a and 38b are rotatably connected to the tips of the opening levers 31tm and 31b via pins 3T.

Rod end 38 oh, 38b is connected to turnbuckle 39, 39bt through the other rod F Y40m,
40bvc connected, these rod ends 40a, 40
b) 421.42 via the heald frame platen via the bin 41
b is rotatably connected δ. And these heald frame platen) 47a.

For 42bK, the heald frame 34m and the lower ffi part of 34b are tightened with bolts, respectively. Here, the link 26a.

28b, 281.211b, 30m, 30b, opening lever 3/1.36b and turnbuckle 311J1°39
The transmission means 43a and 43b are composed of the transmission means 43a and 43b.

In FIG. 3, 44 is an E-shaped retaining ring for preventing the bottle 27.31° 41 from coming off, and 45 is a lock nut. Further, 46 is attached to the groove 47 and the nine heald frames 34a, 34b? Guide brackets 48 fixed to both inner surfaces of the frame 11 for vertical guidance are reeds for beating the weft 1 toward the fabric.

The operation of such an opening device will be explained with reference to the essential parts of the opening cam shown in FIG. In this case, at the position of the opening cam 1s shown in FIG. 4, the heald frame 34b connected to the cam lever 24m is in the upward movement position, and the heald frame 34a connected to the cam lever 24b is in the downward movement position. shall be.

When the shedding cam 19t is rotated counterclockwise in the figure as the loom rotates, the cam lever 24b moves the shedding cam 19t.
As a result, the cam lever shaft 23bt is gradually rotated counterclockwise in the drawing. Therefore, on the cam lever shaft 23b,
Link 26b #211b #30 b s opening shaft 251
Transmission means 43b consisting of b s, opening roleper 38b, etc.
t, the connected heald frame 341 moves upward while being guided by the groove 41 of the guide bracket 46.

On the other hand, since the cam lever 2tl rotates clockwise in the drawing to rotate the cam lever shaft 238' clockwise, the heald frame S4b moves downward while being guided by the groove 4T of the guide bracket 46.

Then, when the opening cam 1s rotates half a turn, the heald frame 14a
, 34b reach the upward and downward movement positions, respectively, and in the next half turn, the heald frame S4b moves upward and the heald frame 34 moves downward, and the opening cam 1s rotates once, so that the heald frame 34a1
34b will now move by one stroke.

Therefore, according to this shedding device, the warp threads can be opened by vertically moving the warp thread frames 341 and 34b by one shedding cam 1s, so that this device can be made into a simple structure.
All operations of the heald frame can be performed using the device on the stand.

Therefore, the manufacturing cost of the shedding device can be reduced, and the time required to adjust the warp shedding timing can be shortened. In addition, by simply providing this shedding device compactly on the 1111 side of the frame of the loom, it is possible to increase the production amount of woven fabric in the heald frame.

FIG. 5 shows another embodiment of the present invention, in which the cam lever shafts 23a, 23a and the opening shafts 29a, 2 of the embodiment described above are used.
By directly connecting the cam lever shafts 9b and 9b, the cam lever shaft 4
It is 9 ohtori and 49b.

According to this embodiment, the structure of the shedding device can be simplified compared to the previous embodiment, so that the manufacturing cost of the shedding device can be significantly reduced.

In each of the above embodiments, 15
2, but in the case of 4 sheets, the opening lever 36s.

38b or the cam lever shafts 4fJa, 49b may be extended, and rod ends 38a+, 38b, etc. may be provided on the extended portions to connect the heald frames, respectively.

The present invention is based on the above i! 2. As mentioned above, an open cam is attached to the camshaft that rotates in conjunction with the main shaft of the loom, and a cam lever is attached to each of the two cam lever shafts that are parallel to this camshaft and located approximately symmetrically to the camshaft. The tips of these cam levers are shifted a*i by approximately 180 degrees with respect to the opening cam, and the cam levers are oscillated as the opening cam rotates, and these oscillations are transferred to each heald frame via a transmission means. Since the shedding motion of a plurality of heald frames can be performed by one shedding cam, the structure of the shedding device can be simplified, and the manufacturing cost of the shedding device can be reduced. Since it can be installed compactly on one frame of the loom, the loom itself can be made smaller.

In addition, since there is only one shedding cam, it is easy to adjust the timing of warp shedding, eliminating the hassle of this work and reducing the adjustment time. ! ! It can also be reduced in size.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a conventional shedding device of a loom, FIG. 2 is a flat view showing an embodiment of the present invention, and FIG.
= 1 schematic view from arrow 1, Figure 114 is a view from ff-4 arrow in Figure 2,
FIG. 5 is a schematic diagram of main parts showing another embodiment of the present invention. 11...Frame, 14...Cam box, 1
B...Cam shaft, 19...Opening cam, 21゜23b...Cam lever shaft, 241, 24b...
Cam lever, 29a, 29b...opening shaft, 34a. 34 b...heddle frame, 361, 361) ・
...Open O Reno (-143a, 43b...Transmission means. Patent applicant: Nissan Motor Co., Ltd., agent, patent attorney, Fujio Sasashima)

Claims (1)

[Claims] A camshaft (18) that rotates 1/2 per rotation of the main shaft of the loom in conjunction with the loom, an opening cam (1s) attached to this camshaft (18), and a camshaft (1s) parallel to the camshaft (1B). and two cam lever shafts (231123b) disposed at substantially symmetrical positions with respect to the cam shaft (1B), each attached to these cam lever shafts (21° 23b) and approximately 180 degrees relative to the opening cam (19). Two cam levers (24m, 24b) that abut at shifted positions and swing with the rotation of the opening cam (19), and these cam levers (24a)
, 24b) respectively to the heald frame (348°34b)
Transmission means (43a, 43
b) A shedding device for a loom comprising: