JPH0441194Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a positioning device for a doffing truck of a yarn false twisting machine, and in particular, the present invention relates to a positioning device for a doffing truck of a yarn false twisting machine, and in particular, a system for temporarily stopping the doffing truck at a predetermined position by a stop sensor or the like. The present invention relates to a positioning device for a doffing truck of a yarn false twisting machine, which can guide and stop the doffing truck at a more accurate stop position after the doffing truck is stopped.

[Prior Art] A yarn false twisting machine generally has a structure as shown in FIG.

The filament yarn Y fed out from the yarn feeding package P ₁ of the creel stand a is false-twisted through the first heater b, yarn cooling plate c, false twisting device d, and second heater e in order, and then wound in the winding device f. It is adapted to be wound up into a take-up package _P2 . A peg stand h having a plurality of pegs g supporting an empty bobbin B is arranged at a position facing the winding device f. Then, between the winding device f and the peg stand h, the winding package P ₂ , which has been fully wound by the winding device f, is doffed and placed on the peg stand h.
A doffing cart i is arranged for automatically exchanging the empty bobbin B above for doffing work. Note that this trolley i is self-propelled and is provided with a drive device (not shown) for self-propulsion.

The doffing truck i must stop at an accurate position relative to each winding device f in order to perform doffing work for each winding device f.

Conventionally, as a running stop positioning device, as shown in FIG. 8, a doffing truck i is provided with a deceleration sensor m and a stop sensor n toward the winding device f side at the lower part thereof. On the side of the winding device f above the rail j that guides the roller k of the doffing truck i, positioning blocks o are provided at predetermined intervals for each doffing work position. This block o functions as a sensed object for the deceleration sensor m and stop sensor n to sense and stop the doffing truck i at a predetermined position.

When stopping the self-propelled doffing truck i at a predetermined position, first
Direction) The front deceleration sensor m senses the positioning block o and decelerates the truck i, and then when the stop sensor n senses the block o, the truck i is stopped.

[Problems to be solved by the invention] By the way, when doffing truck i is stopped by controlling the drive device built into this truck i with two sensors m and n, Slight deviations occur in the stopping position due to various conditions such as differences in running speed.

In this way, if the stop position of the doffing cart i shifts, the handling mechanisms (not shown) such as the thread hooking device, package takeout device, and bobbin insertion device equipped on the doffing cart i will be slightly shifted. However, there was a problem that seriously hindered its operation.

This invention was made in consideration of the above circumstances,
The purpose is to provide a doffing truck positioning device for a yarn false twisting machine that can accurately position the doffing truck at a predetermined stop position for doffing operations.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a positioning block at each stop position along the running direction of the doffing truck, and the doffing truck senses the blocks. In the positioning device for a doffing cart of a yarn false twisting machine, which is provided with a sensor for stopping the doffing cart, an opening for supplying compressed air for driving a mechanism mounted on the cart is provided at the tip of the block. A supply side of a pneumatic coupling device having a valve energized to close the doffing truck is provided, and a bracket is provided on the doffing truck so as to be able to move in and out of the block, and the block is attached to the tip of the bracket in the direction of travel. A pair of rollers are installed so as to sandwich the block from the front and back, and a valve holder is provided between these rollers to open the supply side valve when the rollers are extended while sandwiching the block. The system is equipped with a receiving side of a compressed air coupling device that introduces compressed air into the doffing truck.

[Operation] When the sensor detects the positioning block and temporarily stops the doffing truck, the bracket is extended and the roller at the tip of the bracket pushes the corner of the positioning block, which causes the doffing truck to move. is moved along the direction. When the doffing truck is guided to a predetermined position, a pair of rollers engage to sandwich the positioning block, thereby restricting movement of the doffing truck. Then, the receiving side of the compressed air coupling device moves further forward, and the valve holding part presses the valve on the supply side to open, and the receiving side and the supply side of the compressed air coupling device are connected, and the compressed air is supplied to the doffing truck side. is introduced and doffing work is carried out.

[Example] An example of the present invention will be described below based on the accompanying drawings.

First, the overall configuration of the yarn false twisting machine according to the present invention will be outlined.

As shown in FIG. 5, a long first heater 2 is provided upright on one side of the working space 1, and a plurality of winding devices 3 are provided on the other side. Further, a creel stand 4 supporting a large number of yarn supply packages P ₁ is arranged at the back of the first heater 2, and a second heater 5 is arranged at the back of the winding device 3. A yarn cooling plate 6, a yarn guide device 7, and a false twisting device 8 are arranged in this order above the work space 1, and feed rollers 9, 10, 11 are provided below the first heater 2 and above and below the second heater 5, respectively. will be placed. The yarn Y pulled out from the yarn feeding package P ₁ passes through the first feed roller 9, passes through the first heater 2 from bottom to top, and diagonally downwards along the rear yarn cooling plate 6 bent by guide pins 12 and 13. The yarn travels and is further introduced into a false twisting device 8 via a yarn guide device 7 . The yarn Y coming out of the false twisting device 8 is bent downward by the guide pin 14 and
After passing through the feed roller 10 and descending inside the second heater 5, the third feed roller 11 and the yarn guide 1
5 and is wound up by a winding device 3 to form a winding package _P2 . The winding device 3 is vertically 3
A total of 12 cradle arms 1 are provided in 4 rows in the front and back direction of the page, supporting the winding package P ₂ .
6. Friction roller 17 that rotationally drives the winding package P ₂ and yarn guide 18 that guides the yarn Y.
It is composed of other parts.

A flat peg stand 20 is arranged in front of the first heater 2 in the work space 1 . The peg stand 20 is made to be able to run in the front and back direction of the paper in Figure 5 by having rollers 21 provided on its lower surface slide on rails 22 laid on the ground, and is normally connected to the winding device by a stopper (not shown). 3
is fixed in a position facing the In addition, on the side of the peg stand 20 facing the winding device 3, there are three stages vertically.
A total of 12 pegs 23 are planted horizontally in four rows in the front and back direction of the paper at equal intervals vertically and front and back, and each peg 23 is fitted with an empty bobbin B, respectively.

A plurality of the winding devices 3 and the peg stands 20 are arranged side by side and adjacent to each other, and a plurality of rows of these are provided. FIG. 6 shows a plan view of two rows of winding devices 3 arranged back to back.

Between the row of winding devices 3 and the row of peg stands 20, a fully wound package P ₂ supported by the winding device 3 is doffed and placed on a peg stand 20.
A doffing cart 25 having a handling mechanism (not shown) for doffing to replace the empty bobbin B supported by the bobbin B is movably provided on the floor surface 24. The winding device 3 side wheels 27 of the doffing truck 25 run on guide rails 28 provided on the frame (not shown) of the winding device 3, and also run on the peg stand 20.
The side wheels 29 run along guide rails 30 provided on the floor 24 (see FIG. 5). Note that the wheels 29 may be replaced with tires and run directly on the ground.

A positioning device is provided between the doffing truck 25 and the winding device 3 for stopping the doffing truck 25 at a predetermined position. next,
This positioning device will be described in detail.

In the doffing truck 25, as shown in FIG. 4, a deceleration sensor 33 and a stop sensor 34 facing toward the winding device 3 are installed in series in front and rear in the direction in which the doffing truck 25 moves. Further, on the winding device 3 side, a predetermined interval (in this embodiment) is provided along the guide rail 28.
A plurality of positioning and fixing blocks 3 are used as objects to be sensed by the two sensors 33 and 34 at intervals of 360 mm).
5 are arranged. The arrangement position of this block 35 is such that the doffing cart 25, which has stopped due to block detection by the sensors 33 and 34, is located at each of the winding device 3 and the pegs 23 of the peg stand 20, which are arranged at intervals of 360 mm. It is in the corresponding position.

The doffing cart 25 has two blocks 35a and 35.
When the block 35a facing forward in the running direction becomes the object to be sensed by the sensors 33 and 34, this block 35b faces the block 35b corresponding to the winding device 3 that performs doffing A truck positioning and fixing device 37 is provided which engages with the truck 25 to guide and fix the truck 25 to an accurate doffing work position.

The carriage positioning and fixing device 37 is designed as shown in FIGS. 1 to 3.

In the figure, reference numerals 40 and 41 indicate fixed positioning rollers, and these two rollers 40 and 41 are provided on the bracket 42 so as to grip the block 35 from the front and rear in the direction in which the carriage 25 moves. Bracket 4
2 is attached to a shaft 44 provided by a bearing 43 so as to be freely retractable toward the block 35 side. The shaft 44 is connected to a screw jack 45 for causing the shaft 44 to move in and out of the block 35 side. This jack 45 is connected to a drive motor 46 that drives it.

A movement control device 48 for controlling the movement range of the bracket 42 supported by the shaft 44 is arranged in parallel with the shaft 44. This control device 48 is fixed to the bracket 42 and
A camshaft 49 that moves with the movement of this bracket 42, an operating cam 50 attached to this camshaft 49, and an operating cam 50 that is provided along the camshaft 49 and connected to the drive motor 46, and that is switched by the cam 50. It is composed of two changeover switches 51 and 52 that control the drive motor 46.

Furthermore, the positioning and fixing block 35 includes:
A supply side 55a (see FIG. 1) of a compressed air connection device 55 for supplying compressed air for the doffing operation of the doffing truck 25 is provided, and the bracket 42 is provided with a supply side 55a (see FIG. 1) connected to the supply side 55a. A receiving side 55b of the compressed air coupling device 55 for sending compressed air into the truck 25 is provided. The supply side 55a of the compressed air coupling device 55 includes a cylindrical body portion 57 having an opening 56 at its tip, a valve 58 that opens and closes the opening 56 from the inside thereof, and a valve 58 that urges the valve 58 toward the opening 56. It consists of a spring 59 and a support plate 60 for the spring 59. The receiving side 55b of the compressed air coupling device 55 pushes the valve 58 and opens the opening 56.
Consisting of a valve holding part 62 that opens, and a receiving side opening (not shown) that sends compressed air from the opening 56 to the truck 25 side piping 63 when it comes into close contact with the cylindrical part 57 of the supply side 55a. has been done.

Furthermore, a self-propelled motor (not shown) for self-propelling the doffing truck 25 is incorporated in the doffing truck 25.
7 drive motor 46 and handling mechanism, etc.
A control unit (not shown) is incorporated which is controlled by signals from the deceleration sensor 33, stop sensor 34, two switch switches 51, 52 of the movement control device 48, etc.

Next, the effect will be explained.

When performing doffing work, first, the doffing cart 25 that has been kept on standby is driven by itself and moved to the doffing work position. Then, when the trolley 25 approaches the working position,
The deceleration sensor 33 senses a block 35a (see FIG. 4) in front of the doffing position, and the control unit decelerates the running speed of the truck 25 based on the signal from this sensor 33. Next, the stop sensor 34 senses the block 35a, and the control unit stops the truck 25 based on the signal from the sensor 34, and drives the drive motor 46 of the truck positioning and fixing device 37 to ensure that the bracket 42 is on the ball. Block 35a corresponding to the winding device 3 for lifting work (see Fig. 4)
Extend to.

When the truck 25 has stopped exactly at the doffing position, the bracket 42 extends to the block 35 and moves the positioning fixed rollers 40, 41 to the block 35.
The carriage 25 is engaged so as to be gripped from both sides of the carriage 25.
and the supply side 5 of the pneumatic coupling device 55.
5a and the receiving side 55b are combined. At this time, the changeover switch 51 of the movement control device 48 switches between the supply side 55a and the reception side 55b of the compressed air coupling device 55.
The drive motor 46 is disposed so as to be disconnected by the cam 50 at the position where the two are connected, and the drive motor 46 is turned off by the changeover switch 51 when the supply side 55a and the reception side 55b of the pneumatic coupling device 55 are securely connected. be cut off.

The trolley 25 is slightly (several mm) relative to the doffing work position.
If the bracket 42 shifts toward the block 35 and stops, the carriage 25 is moved along the guide rail 28 while pushing the corner of the block 35 with one of its positioning fixed rollers 40 and 41. When the truck 25 is guided to the correct doffing position, the rollers 40 and 41 engage the block 35 from both sides to fix the truck 25, and the pneumatic coupling device 55
The supply side 55a and the receiving side 55b of are coupled. At this point, the changeover switch 51 of the movement control device 48 is turned off by the cam 50, the drive motor 46 is stopped, and the bracket 42 is moved to the screw jack 4.
5 is pressed against the block 35.

Then, the control unit receives the switching signal from the changeover switch 51 and operates the handling mechanism to perform the doffing operation. When the doffing operation is completed, in response to this, the control unit controls the drive motor 46 of the bogie positioning and fixing device 37.
is driven to store the bracket 42 on the cart 25 side. At this time, the changeover switch 52 switches the cam 5 when the bracket 42 is retracted to the trolley 25 side.
At that point, the selector switch 52 is turned off and the drive motor 4 is turned off.
Stop 6.

Next, the control unit drives the self-propelled motor (not shown) of the doffing truck 25 based on the switching signal from the changeover switch 52, and moves the doffing truck 25 to the next doffing work position.

Then, repeat the above steps.

The series of controls in the above steps is incorporated into the control unit as one pattern.

As described above, the deceleration sensor 33 and the stop sensor 3
4, the doffing cart 25 is once stopped at the doffing work position, and the doffing cart 25 is guided to the correct working position and fixed by the doffing device 37, so that the doffing work by the doffing cart 25 can be performed reliably without any hindrance. can be done.

Further, in the cart positioning and fixing device 37, the block 35 is held between a pair of rollers 20 and 21 to position the doffing cart 25.
Since the receiving side 55b of the compressed air connecting device 55 between the blocks 35 and 21 is connected to the supplying side 55a at the tip of the block 35 to introduce compressed air, the supply side 55 of the compressed air connecting device 55
5a and the receiving side 55b can be connected accurately and reliably, and the doffing operation can be performed reliably without causing any displacement of the cart 25 during this connection. Furthermore, the pneumatic coupling device 5
5 is connected after the doffing cart 25 is guided and adjusted to the correct working position, so doffing work is not performed before the working positioning of the doffing cart 25 is completed, making the doffing work more reliable and safe. It can be made into something.

[Effects of the invention] In summary, the invention provides the following effects.

(1) The doffing cart, which has been temporarily stopped by the sensor, is further guided to a stop using a pair of rollers and a positioning block, so the doffing cart can always be stopped at an accurate position. , Doffing work can be performed without any trouble.

(2) Moreover, the supply side of the compressed air coupling device is provided at the tip of the positioning block, and the receiving side is provided between both rollers at the tip of the bracket, and these supply and receiving sides are connected with the block being held between the rollers. Since they are connected, the supply side and the receiving side of the compressed air connection device can be connected accurately and reliably without causing any positional deviation of the cart, and from this point of view as well, doffing work can be performed smoothly.

(3) The supply side and the receiving side of the pneumatic coupling device are connected after the doffing truck has been stopped at the correct position, so doffing work will not be performed by mistake before the doffing truck has been positioned. , doffing work can be performed safely and reliably.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the main parts of the doffing cart positioning device of the yarn false twisting machine of the present invention, Fig. 2 is a side view of Fig. 1, and Fig. 3 is the doffing cart positioning device of the present invention. A plan view, Figure 4 is an enlarged view of the main parts of the doffing cart of the present invention, Figure 5 is a diagram showing the overall structure of the yarn false twister of the present invention, and Figure 6 is a diagram showing the yarn false twister and multiple peg stands. FIG. 7 is a diagram showing the overall structure of a conventional yarn false twisting machine, and FIG. 8 is a diagram showing a conventional traveling stop positioning device. In the figure, 3 is a winding device, 20 is a peg stand, 2
5 is a doffing truck, 35 is a positioning fixing block, 37 is a truck positioning and fixing device, 40 and 41 are positioning fixing rollers, 42 is a bracket, and 55a
55b is the supply side of the pneumatic coupling device, and 55b is the receiving side of the pneumatic coupling device.

Claims (1)

[Scope of utility model registration request] In a positioning device for a doffing truck of a yarn false twisting machine, a positioning block is provided at each stop position along the running direction of the doffing truck, and a sensor is provided on the doffing truck to detect the block and stop the doffing truck. , a supply side of a compressed air coupling device having an opening for supplying compressed air for driving a mechanism mounted on the truck and a valve energized to close the opening is provided at the tip of the block; A bracket is provided on the doffing truck so that it can freely appear and retract from the block,
A pair of rollers are attached to the tip of the bracket so as to sandwich the block from the front and back in the running direction, and when the rollers are extended while sandwiching the block, the valve on the supply side is opened. 1. A doffing truck positioning device for a yarn false twisting machine, characterized in that it has a valve holding portion and a receiving side of a compressed air coupling device that introduces compressed air from the opening into the truck.