JPS599029Y2 - Weft mixing device in shuttleless loom - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a weft mixing device for a rapier type loom.

Conventionally, in a weft mixing device of a rapier loom, as shown in FIG. 1, two sets of selection levers 2 supported on a fixed shaft 1 are used.
, 3 are pressed against cam disks 7, 8 fixed to a cam shaft 6 by tension springs 9, 10, and weft guides 11. 12 are provided.

Two weft supply bobbins 1 arranged on the outside of the fabric 13
The weft threads 16.17 drawn out from the weft threads 4.15 are each passed through the weft guide holes 11.12.

The figure shows that the weft guide hole 11 of the selection lever 2 is lowered and the weft 1
6 to the delivery position, the weft insertion carrier 18 inserts the weft 16
The figure shows the state on the verge of grasping.

Further, as the cam disks 2 and 3 rotate, the weft guide hole 11 rises to the position 11a, and at the same time, the weft guide hole 12 of the swing lever 3 descends to guide the weft 17 to the weft transfer position. Met.

The weft mixing device constructed as described above guides the weft threaded through the weft guide holes of the two selection levers to a delivery position by means of two cam discs fixed to a cam shaft.

If these two cam disks are used to continuously use two types of fabric with the same weft loading ratio, there is no need to replace the two cam disks, but the fabric using this device Usually, many types are produced in small quantities, so when weaving by changing the weft loading ratio of two types, it takes time and effort to replace both cam disks, and it is necessary to replace two cam disks of many types. It costs a lot of money to constantly prepare and stock the boards, and if storage management is not carried out correctly so that they can be used at any time, the time when the loom is stopped for replacement increases, which tends to reduce work efficiency.

In order to solve the above-mentioned drawbacks, the present invention has been developed to provide a weft mixing device for a rapier loom with one cam device fixed to a camshaft and two swing levers attached to one fixed shaft. Attach a selection lever with a weft guide to the
Connecting one end of the connecting plate to a fulcrum provided on the swing lever,
The other end is connected to a reciprocating cam pressing member having a follower that contacts the one cam device, and one of the two wefts pulled out from the two weft supply bobbins is connected to The present invention provides a weft mixing device for a shuttleless loom that guides the weft to a weft delivery position in accordance with the weft insertion rate.

Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In a weft mixing device of a rapier loom, one cam disk 21 is attached to a camshaft which is transmitted from the drive shaft of the loom as shown in FIG. A follower 22 that is fixed and contacts the cam disc 21 is rotatably attached to a pressing member 23 that reciprocates back and forth, and this pressing member 23 is connected to the fixed holder 2.
It is loosely fitted into a hole 25 provided in 4.

On the other hand, two swing levers 27 are swingably attached to one fixed shaft 26. 28 are respectively provided with fulcrums 29 and 30, the fulcrums 29 are located at the lower part of the mounting hole of the fixed shaft 26 to which the swinging lever 27 is attached, and one of the fulcrums 30 is located at the bottom of the mounting hole of the fixed shaft 26 to which the swinging lever 27 is attached. It is provided above the attachment hole of the fixed shaft 26 to which the fixing shaft 26 is attached.

One end of a connecting plate 31.32 is connected to one end of the pressure contact member 23, and the other end is connected to the supporting point 29.30, respectively.

The lower ends of the swing levers 27 and 28 have weft guide holes 33 at their tips, respectively. Weft selection levers 35 and 36 having 34 are respectively fixed, and the follower 22 is pressed against the cam disk 21 by a tension spring 38 stretched between the upper end of the swing lever 28 and a fixed part 37. ing.

The operation of the above structure will be explained below. When the cam disk 21 fixed to the camshaft 20 which is transmitted from the drive shaft of the loom rotates, the tension spring 38 whose one end is attached to the swinging lever 28 causes the cam to be rotated. A pressing member 23 to which a follower 22 which is pressed against a disc 21 is attached loosely fits into a hole 25 provided in a holder 24 and reciprocates from side to side.

As shown in the figure, when the follower 22 is in contact with the smallest diameter part of the cam disc 21, the pressure member 23 moves to the left, and the connecting plate 31 attached to it moves to the fixed shaft 26.
The selection lever 35 fixed to the lower end of the swing lever 27 is rotated clockwise about the fixed shaft 26, and the tip of the selection lever 35 is pulled to the left. A weft guide hole 33 provided in the weft thread guide hole 33 descends to guide the weft drawn out from the weft supply bobbin to a weft delivery position, and then delivers the weft to the weft insertion carrier.

Further, the connecting plate 32 attached to the pressure contact member 23 pulls the swing lever 28, rotates the selection lever 36 fixed to the lower end of the swing lever 28, and opens the weft guide hole 34 provided at the tip. In order to raise this weft thread guide 3
The weft thread drawn out from the other weft supply bobbin 4 is located away from the weft delivery position.

On the other hand, when the follower 22 is in contact with the maximum diameter part of the cam disc, the pressure contact member 23 is pushed and moved to the right, and the connecting plate 31 attached to it is moved to the fixed shaft 2.
In order to rotate the swinging lever 27 counterclockwise using the selection lever 35 as a fulcrum, the weft thread guide hole 33 provided at the tip of the selection lever 35 is raised, and the sewing thread that has been pulled through is moved to a position away from the weft delivery position. At the same time, the swing lever 28 is pushed by the connecting plate 32 and rotates clockwise about the fixed shaft 26, and the selection lever 36 fixed to the lower end of the swing lever 28 is moved. The weft guide hole 34 provided at the tip portion descends and guides the weft drawn out from another weft supply bobbin to a weft delivery position and delivers it to the weft insertion carrier.

FIG. 3 shows another embodiment, in which a pressure contact member 23 loosely fits into a hole 25 provided in the holder 24 of FIG. 2 and slides from side to side.
Instead, a press member 23a is provided which is supported by a fulcrum 24a and is swingable.

A rotatable follower 22 is provided at the tip of the pressure contact member 23a.
is attached to the fulcrum 2 which also connects the connecting plates 31 and 32.
3b is provided.

A tension spring 38 stretched between the pressure contact member 23a and the fixed part 37 moves the follower 22 to the cam disk 2.
1, and press the selection lever 35.1 as described above. The weft guide holes 33 and 34 provided in each of the weft threads 36 and 36 are alternately lowered to guide the drawn weft thread to the weft delivery position.

Furthermore, in the embodiment shown in FIG. 4, instead of the cam device using one cam disk 21 shown in FIG. 2, a sphere rocket 21a is fixed to the cam shaft 20 and an endless chain 21b is attached. A cam device is provided on the endless chain 21b in which a cam plate 21C is combined and fixed so as to drive the two types of weft threads at an arbitrary ratio.
It is capable of guiding different types of weft yarns to the weft transfer position at any desired rate, and there is no need to constantly stock multiple types of cam plates.
The cost is low and inventory management is easy.

As described in detail above, the present invention provides a weft mixing device in which:
By being equipped with two cam devices, when changing the weft loading ratio of two types, there is no need to replace two cam discs as in the past, and it can be done by replacing one cam disc. Replacement work is easy, and even if you always keep a large variety of cam discs in stock for high-mix, low-volume production, the cost will be cut in half, and inventory management is easy, making it easy to replace cam discs. This has the effect of reducing the stopping time of the loom and improving work efficiency.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a conventional device, Fig. 2 is a side view showing an embodiment of the device of the present invention, and Fig. 3 uses a pressure contact member that makes an oscillating motion instead of a pressure contact member that makes a reciprocating motion. FIG. 4 is a side view showing an embodiment, and FIG. 4 shows a side view of an embodiment in which a cam plate is fixed on an endless chain in place of the cam disk and is rotated by a sphere rocket.

Claims (1)

[Scope of utility model registration request] A rapier-type loom in which two weft selection levers are operated by one cam device to select one of two sewing threads drawn out from two weft supply bobbins and guide it to a weft delivery position. In this weft mixing device, one fixed shaft 26 has two
Attach the swing levers 27 and 28, and install the swing levers 27 and 28.
．． A weft guide hole 33 is provided at the tip of 28. A selection lever 35 with 34. 36 and connect the ends of the two connecting plates 31 and 32 by providing a fulcrum at one end of the pressure contact member 23 that reciprocates back and forth by one cam device,
and the other end is connected to the swing lever 35. The selection lever 35.3 is connected to a fulcrum 29.30 provided at the
6 weft guide hole 33. A weft mixing device for a shuttleless loom, characterized in that the weft threads are alternately lowered to guide the weft threads to a weft delivery position.