JPS6249377B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an independent drive device for an inside tappet device in a weaving machine for shedding using an inside tappet device.

In general, in a loom having a passive inside tappet shedding device, if a weft insertion error occurs during weaving, it is necessary to remove the incorrect weft yarn and align the weft ends. However, as the weave structure becomes more complex, the number of shedding operations required to complete the weaving cycle increases, making the process extremely complicated. In addition, since shedding is accompanied by dry reed beating, there is a disadvantage that the reed feathers promote fuzzing of the warp threads and warp thread breakage, and since the shedding device is connected to the start of the loom, the dry reed beating is The warp threads advance by a certain amount, and it is extremely difficult even for a skilled person to return the warp yarns to their original position by the amount of advance, and this is a major cause of the occurrence of corrugated weaves in this area, which deteriorates the quality of the fabric. In order to overcome these drawbacks of the conventional device, a tapepet cam reversing device has been proposed, as shown in, for example, Japanese Patent Application Laid-open No. 52-148260, but in this known technology, the transmission between the intershaft and the tapepet cam shaft is cut off. However, since it has a structure in which a clutch is provided for each, it has a major drawback that if the rotation speed of the ground weaving tapepet and the selvedge weaving tapepet differ depending on the fabric structure, the selvedge weaving tapepet cannot be driven independently. At the same time, it had to be structurally complex.

The present invention overcomes the above-mentioned drawbacks and provides an independent drive device for a tappet device which is simple in structure and easy to operate.

Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In a passive inside tappet device of a loom, a main shaft 1 is rotatably supported by a machine frame 2, and power is transmitted from a starter motor (not shown). The rotation speed is synchronized with the weft thread driving. A gear 5 meshing with a gear 4 fixed to the main shaft 1 with a key 3 is fixed to one end of a clutch button 6 with a key 7,
A clutch shaft 8 is loosely fitted into the inner diameter of the clutch bush 6, and the outer diameter is supported by the machine frame 2 via a bearing 9. At the other end of the clutch bush 6, a protruding clutch 10 having a phase difference of 180° is provided.
is provided. A spline 12 is formed on the clutch shaft 8 and is loosely fitted to the switching clutch 11.
A clutch groove 13 and a protrusion 14 having a phase difference of 180 degrees are formed, and the protrusion 10 of the clutch bush 6 and the clutch groove 13 are connected to a spline 15 installed on a thrust bearing 17 buried in the side surface of the worm wheel 16 during normal operation. The clutch shaft 8 is rotated by constant engagement due to pressure. A gear 18 fixed to one end of the clutch shaft 8 meshes with a gear 19 to rotate the fabric tappet 21 on the fabric tappet shaft 20 in the forward direction, and a gear 22 fixed to the other end meshes with a gear 23a to rotate the fabric tappet 21 on the fabric tappet shaft 20. The selvage tapepet 23b integrally formed with the selvedge tapepet 23b is mounted on the ground tapepet shaft 20 via a bearing 24 and rotates in the normal direction, and its position is regulated by set collars 25, 25.

On the other hand, a foot lever (not shown) is attached to one end of the connecting rope 26, and a guide roller 27 is attached to the other end.
It is connected to a bifurcated switching lever 29 supported by a pin 28 via a pin 28, and a roller 30 is rotatably attached to the tip thereof and is fitted into a groove 31 of the switching clutch 11. The worm wheel 1
A thrust bearing 32 is provided between the clutch shaft 6 and the gear 18, and a set collar 33 is fixed on the clutch shaft 8 in contact with the clutch side of the clutch button 6. The worm wheel 1
Reference numeral 6 is rotatably mounted on the clutch shaft 8 and meshes with the worm 34, and is connected to a tappet drive motor 38 via bevel gears 36 and 37 mounted on the shaft 35.

In short, the device of the present invention moves the switching clutch 11 to cut off the power transmission from the main shaft 1, and reversely rotates the weave tapepet and the selvage tapepet mounted on the weave tapepet shaft 20 by the tapepet drive motor 38. It was designed so that

The operation of the above configuration will be described below. In the reversing device of a passive inside tappet device of a loom, the main shaft 1 is supported by the machine frame 2 and is driven to rotate by being decelerated from the starting motor via the power transmission means. This rotational speed and weft thread driving are generally synchronized, and one rotation of the main shaft 1 causes one weft thread driving. During normal operation of the loom, the rotation of the main shaft 1 causes the fixed gear 4 to
The rotation is transmitted via the gear 5 to the clutch button 6 which is loosely fitted into the clutch shaft 8. A clutch protrusion 10 provided at the other end of the clutch button 6
Since the groove 13 of the switching clutch 11 is pressed and engaged by the pressure of the spring 15, the spline 1 formed on the clutch shaft 8
The switching clutch 11, which is loosely fitted into the clutch shaft 8, rotates together with the clutch shaft 8. Also, a gear 1 fixed to one end of the clutch shaft 8
8 is a ground tapepet shaft 20 via a gear 19.
The gears 18 and 18 are rotated at a required number of revolutions adapted to the textile structure, and the determination of this required number of revolutions is done by the gears 18 and 18.
19, and the fixed gear 22 attached to the other end meshes with the gear 23a formed integrally with the selvedge tapepet 23b, and the set collar 2
The integrally formed gear 23a and tapered tappet 23b whose positions are regulated by the bearing 2
The protrusion 14 of the switching clutch 11 is connected to a clutch provided on the side surface of the worm wheel 16. It does not mesh with the groove 39.

On the other hand, if it is necessary to align the weft ends due to a weft insertion error, stop the operation of the loom and step on the foot lever to switch the forked switch lever 29 attached to the support shaft 28 via the connecting rope 26. A roller 30 mounted at the upper end presses the switching clutch 11 and compresses the spring 15,
In the case of the example shown in FIG. 1, the switching clutch 11 fitted on the spline 12 is slid to the right to
3 and the protrusion 10 and the connection with the main shaft 1 is interrupted, and at the same time, the protrusion 14 of the switching clutch 11 engages the worm wheel 16.
It meshes with the groove 39 of. When the foot lever is released from the foot lever simultaneously with this engagement, the worm 34 rotates the worm wheel 16 from the tappet drive motor 38 via power transmission means such as bevel gears 37 and 36.
The worm wheel 16 transmits power via splines 12 of the switching clutch 11 to a clutch shaft 8 in mesh with the clutch shaft 8, and a gear 18 fixed to one end of the clutch shaft 8 is mounted via a gear 19 on a tapepet shaft 20. The ground weave tapepet 21 is rotated in the opposite direction by one weft, and the gear 22 attached to the other end meshes with the gear 23a formed integrally with the selvage tapepet 23b, and the left and right positions are adjusted using the set collars 25, 25. Regulated gear 23
The heald frame is operated by rotating the heald tapepet a and the selvage tapepet 23b in the opposite direction by one weft thread on the ground tapepet shaft 20 via the bearing 24.

However, as mentioned above, main shaft 1
The weft thread is driven through the rotation, and the rotation ratio between the fixed gear 4 and the gear 5 is 2:1, and the clutch groove and protrusion are formed with a 180 degree phase shift through the axis. , when the switching clutch 11 rotates half a turn, the protrusion 14 of the switching clutch 11 is moved by the reaction force of the pressing spring 15.
releases the engagement with the groove 39 of the worm wheel 16, and the groove 13 engages with the protrusion 10 of the clutch button 6.
By automatically returning to the position, one rotation of the main shaft 1 can reversely rotate the ground weave tapepet 21 and the selvage tapepet 23b by one weft.

Further, by continuously depressing the foot lever, the ground weave tapepet 21 and the selvage tapepet 23b can be continuously moved in reverse. Further, the tapepet device drive motor 38 may be driven each time before performing the weave matching work, and when it is necessary to move the ground weave tapepet 21 and the selvage tapepet 23b in the forward or reverse direction during the weave face matching work. By using a phase changeover switch for the input power source of the motor 38, forward and reverse rotation can be easily performed.

As described in detail above, when performing weft alignment due to a weft insertion error, the device of the present invention operates the foot lever to switch the switching clutch while the loom is stopped, and transfers power from the main shaft. It is possible to operate the heald frame by blocking the ground weave tapepet and the selvage tapepet at a rotation speed corresponding to the rotation of the main shaft in the forward or reverse direction.The mechanism is simple and the operation is reliable, and it also prevents unauthorized use. Weft removal and weaving work can be done easily and reliably, and there is no need to run the reed or operate the weft delivery device or winding device, which may cause damage to the weaving or warp threads. This has the effect of improving textile quality and production efficiency without any problems.

Although the switching lever 29 of the clutch and the foot lever are connected by the connecting rope 26, it is also possible to use a link mechanism instead of this rope.

[Brief explanation of the drawing]

The figures show an embodiment of the device of the present invention, in which Fig. 1 is a plan cross-sectional view of the tappet device when it is reversed, Fig. 2 is a partial cross-sectional side view showing the gear transmission relationship, and Fig. 3 is an implementation of the switching lever. It is a side view which shows an example. DESCRIPTION OF SYMBOLS 1... Main shaft, 6... Clutch button, 8... Clutch shaft, 11... Switching clutch, 16... Worm wheel, 20... Plain tapepet shaft, 21... Plain tapet, 23
b...Ear woven tapepet.

Claims (1)

[Claims] 1. A main shaft rotated by a starting motor for driving the loom, a tapepet shaft for ground weaving and a clutch shaft for driving the ground weaving tapepet and the selvage tapepet are disposed, and on the clutch shaft,
A gear wheel capable of engaging and disengaging a clutch device, which is slidable in the axial direction and is rotatable integrally with the clutch shaft, is provided and connected to the main shaft, and each gear on the clutch shaft is connected to the main shaft. The ground weave tapepet and the selvage tapepet are connected through a gear group that can be set to a required rotation ratio for forward rotation, and furthermore, the gear that can be engaged with and disengaged from the clutch device on the clutch shaft and rotatable on the clutch shaft is provided. What is claimed is: 1. An independent drive device for a tapepet device in a loom, characterized in that it is connected to a separately provided tapepet device drive motor to enable reverse rotation of a ground weave tapepet and a selvage tapepet.