JPH0441745A - Weft insertion pump of water jet loom - Google Patents

Abstract

PURPOSE:To readily change the injection timing of pressured water during operation of a waving machine by engaging a main shaft-side gear having a tooth trace inclined to the axial direction with a gear having a tooth trace also inclined to the axial direction on the side of a driven shaft pivoting a cam for driving a plunger of a pump, and changing the mutual rotational phase. CONSTITUTION:In a pump 1 for weft insertion where a plunger is moved back and force by engaging a main shaft 41-side gear 42, having a tooth trace inclined to the shaft direction with a driven shaft 43-side gear 44 having a tooth trace also inclined to the shaft direction and actuating a lever 16 shaken by rotation of a cam 19 attached to the driven shaft 43, a rack 48 is moved to the direction of the arrow mark X X through a worm gear 48, attached to a motor shaft 47a, and the driven shaft-side gear 44 is displaced to change the rotational phase between the main shaft 41 and the driven shaft 43, by rotating a pulse motor 47 by a prescribed angle based on a direction from a controller 52. The rotational angle of the cam 19 to the rotational angle of the main shaft is changed thereby and accordingly, thus the discharge timing of the pump 1 is changed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a weft inserting pump installed in a water jet loom of an SIl.

(Prior art) A water jet loom weft insertion device sucks water necessary for one weft insertion from a constant water tank provided below the loom using a plunger bone 1, which is a weft insertion pump.
This water is force-fed to a main nozzle installed close to the warp opening of the machine, and pressurized water is intermittently injected from this main nozzle, causing the weft to fly and weft to the warp opening. I'm trying to get them in.

The plunger pump has conventionally been constructed as shown in FIG. 3. In FIG. 6, the plunger pump 1 has a water inlet 3 and a water outlet 4 on one side of the main body 2 attached to the side of the frame of the loom. A pump chamber 5 is formed in communication between the inlet 3 and the outlet 4. Also, check valves 6 and 7 are provided at the inlet port 3 and the discharge port 4, respectively.
is provided to regulate the flow of water in the direction shown by arrow A.

On the other hand, in the center of the direction perpendicular to the flow path connecting the inflow port 3 and the discharge port 4 of the pump body 2, there is a through hole whose one end communicates with the pump chamber 5 and the other end opens to the outside of the pump body 2. The first through hole 8 in which the number 8 is formed consists of a small diameter part 8a on the side of the pump chamber 5 and a large diameter part 8b on the opening side, and one end of the inner part f19 is fixed to the small diameter part 8a. Further, a plunger 10 is mounted on the inner periphery of the inner cylinder 9 so as to be slidable in an axial direction in a fluid-tight manner, and one end of the plunger 10 projects into the pump chamber 5 . Further, one end of each of a link 11 and an intermediate fl 12 is attached to the other end of the plunger 10,
The intermediate portion 12 extends along the outer periphery of the inner tube 9, and has a flange portion 12a integrally formed at its tip. The flange portion 12a can come into contact with the stepped portion 8C of the through hole 8.

Further, an outer cylinder 13 is fitted into the inner periphery of the large diameter portion 8b of the through hole 8, and is fixed to the pump body 2 with a lock nut 14. Furthermore, a hole 13a is formed concentrically on the end surface of the outer cylinder 13 protruding from the pump body 2.
An intermediate Fj12 is fitted into the hole 13a so as to be slidable in the axial direction. Further, between the inner side of the end surface of the outer cylinder 13 and the flange part 12a of the intermediate part 12, a coil sedge ring 15 is installed along the outer periphery of the intermediate part 1'i12, and the plunger 10 is projected into the pump chamber 5. It is biased in the direction.

One end of the link 11 is rotatably connected to one end of the plunger 10 protruding from the pump body 2.
The other end of the cam lever 16 is rotatably connected to one end of the cam lever 16. The middle portion of the cam lever 16 is rotatably supported by a frame (not shown) via a support shaft 17, and a cam follower is attached to the @ end of the cam lever 16. 18 is rotatably attached. The cam follower 18 is brought into contact with the outer periphery of one drive cam that is rotationally driven in conjunction with the main shaft of the machine A (not shown) by the biasing force of the coil spring 15.

In the weft inserting pump configured as described above, the drive cam 19 rotates once in the direction shown by arrow B for every rotation of the main shaft am. When the cam follower 18 rides on the high part of the cam mountain as one drive cam rotates, the cam lever 16
rotates in the direction shown by the arrow C, the plunger 10 moves in the direction shown by the arrow E17D via the link 11, and the check valve 6
, 7, water is sucked into the pump chamber 5 from the inlet 3.

When the drive cam 19 rotates further and passes the highest part of the cam crest, the plunger 10 rapidly moves in the direction shown by arrow E through the intermediate portion 12 due to the biasing force of the coil spring 15. As a result, pressurized water is force-fed from the discharge port 4 to a main nozzle (not shown). While the loom is continuously rotating, the above movement is repeated every time the weft is inserted.

The technique described above is disclosed in Japanese Patent Laid-Open No. 60-199952, and its basic structure is the same as that described above.

(Problems to be Solved by the Invention) In the conventional cotton filling pump configured as described above, the M moving cam 19 is fixed to a driven shaft that is rotationally driven in conjunction with the main shaft. For this reason, the injection timing of pressurized water injected from the main nozzle was constant with respect to the rotation angle of the main shaft.

However, as AM speeds have increased recently, precise precision of this injection timing is required.

For this reason, in the past, in order to adjust the injection timing, adjustments were made such as stopping the loom and changing the mounting phase of the gear that rotationally drives the drive cam. However, this adjustment requires the skill of the operator and requires a large number of man-hours. Furthermore, all the systems had to be stopped during the adjustment, which had the disadvantage of lowering operating efficiency.

The present invention has been made in view of the above points, and an object of the present invention is to provide a weaving pump for a water jet loom that can easily adjust the injection timing of pressurized water for weft insertion without stopping the loom. purpose.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides se! A driven shaft side gear that meshes with a main shaft side gear, a cam attached to the driven shaft, a lever that is driven to swing by the rotation of the cam, and a plunger that is driven reciprocally by the swing of the lever. In the weft inserting pump of the water jet loom, the tooth traces of the gear on the main shaft side of the loom and the gear on the driven shaft side are formed to be inclined with respect to the axial direction, and the pair of gears are moved relative to each other in the axial direction. The present invention is characterized in that a drive means is provided for changing the rotational phase between the two.

(Function) According to the above configuration, the main shaft side gear and the driven shaft side gear are
Since the gears are engaged through tooth traces formed at an angle with respect to the axial direction, the rotational phase between the gears can be changed by moving the pair of gears relative to each other in the axial direction using a driving means. I can do it. Therefore, the injection timing of the pressurized water injected by the weft insertion pump can be easily changed and adjusted with respect to the rotation angle of the main shaft.

<Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

An embodiment of the present invention is shown in FIGS. 1 and 2. FIG.

In these figures, parts that are the same as or equivalent to those of the conventional example shown in FIG. 3 are designated by the same reference numerals, and their explanations will be omitted.

FIG. 2 is an explanatory diagram showing a schematic configuration of a weft insertion device of a water jet loom of a liquid jet loom to which this embodiment is applied. A constant water level water tank 21 is disposed below the side surface of the frame of the loom, and a pipe 22 connected to a water source is attached to the side wall of the water tank 21. Further, a float 23 is provided at one end of the pipe 22 protruding into the water tank 21 to keep the water level in the water tank 21 constant.

A plunger pump 1 having a configuration similar to that shown in Fig. 3 is attached to the side of the frame, and a pump body 2 is attached.
One end of the water supply pipe 24 is connected to the inlet 3 of the water supply pipe 24 , and the other end of the water supply pipe 24 extends below the water level in the water tank 21 . Further, a drain pipe 25 is connected to the pump body 2 to return the internal drain into the water tank 21.

On the other hand, a main nozzle 26 is provided close to a warp opening (not shown) on the upper surface of the ssi.
A length measuring drum 27 is disposed coaxially on the weft insertion side. Also, between the main nozzle 26 and the length measuring drum 27, there is a main nozzle 26 that is unraveled from the length measuring drum 27.
A gripper 29 is attached to the frame 30 for gripping the weft thread 28 guided thereto. Drive shaft 31 of gripper 29
A cam follower 32 is rotatably mounted on the lower end of the loom, and the cam follower 32 abuts the outer periphery of a drive cam 33 that is driven to rotate in synchronization with the rotation of the main shaft of the loom. The discharge port 4 of the pump body 2 and the main nozzle 26 are connected by a pipe 34.

Note that reference numeral 35 is a yarn guide provided between the length measuring drum 27 and the gripper 29 and guiding the weft 28.

In the weft inserting device configured as described above, the drive cam 33 rotates in synchronization with the rotation of the am main shaft, and the weft is released from the gripper 29 when the warp 28 is at its maximum opening. At the same time, the drive cam 19 also rotates in synchronization, and the plunger pump 1 feeds pressure water to the main nozzle 26 via the water supply pipe 24 and piping 34, and the pressure water is injected from the main nozzle 26. The injected pressurized water causes the weft yarns 28 to fly toward the openings of the warp yarns.

In FIG. 1 showing the drive mechanism of the drive cam 19, which is a feature of this embodiment, a main shaft side gear 42 is fixed to a drive shaft 41 that rotates in synchronization with the main shaft of the loom, and a frame (not shown) A driven shaft gear 44 is attached to a driven shaft 43 rotatably supported parallel to the drive shaft 41 . A key 45 is fixed to the outer periphery of the driven shaft 43 so as to protrude in parallel to the axial direction, and a key 44a formed at the center of the driven shaft side gear 44 is fitted into the key 45.

The driven shaft side gear 44 is attached to the driven shaft 43 so as to be movable in the axial direction and locked against rotation, and is meshed with the main shaft side gear 42. The tooth traces 42a and 44b of both gears 42 and 44 are inclined with respect to the axial direction, and are helical gears.

On the other hand, a motor mounting member 46 is provided on the frame, and a rotating shaft 47a is connected to a driven shaft 43 of the motor mounting member 46.
The pulse motor 47, which is a driving means, is
The zero-rotation shaft 47a to which is fixed is the motor mounting member 46
The worm gear 48 is fixed therethrough. Further, a rack 49 is supported at the lower end of the motor mounting member 46 so as to be freely slidable in a direction parallel to the driven shaft 43, and a worm gear 48 is meshed with the rack 49.

Furthermore, a pair of support shafts 50 are provided on the lower surface of the rack 49 in a right angle direction.
are provided, and a roller 51 is rotatably supported on each support shaft 50. The driven shaft side gear 44 is held between the thresholds of the pair of rollers 51. Note that the rotation of the pulse motor 47 is controlled by a control device 52.

Next, the operation of this embodiment will be explained. When the pulse motor 47 is rotated by a predetermined angle by the control device 52, the rotation axis 4
Rack 49 via worm gear 48 fixed to 7a
moves in the direction of arrow X-X. The driven shaft gear 44 is also moved in the direction of the arrow AB by the pair of rollers 51 supported by the rack 49. As a result, the relative rotational phase of the main shaft side gear 42 and the driven shaft side gear 44, which are meshed with each other via the tooth traces 42a and 44b inclined with respect to the axial direction, can be changed. Then, the rotation angle of the drive cam 19 relative to the rotation angle of the main shaft is changed, and the follower 18 and cam lever 1 are
6. The discharge timing of the plunger pump 1 can be changed via the link 11, and the injection timing of the pressurized water injected from the main nozzle 26 can also be changed.

According to this embodiment, the injection timing of pressurized water injected from the main nozzle 26 can be easily changed by a simple operation of rotating the pulse motor 47. Moreover, since this change can be made without stopping the operation of the ms, work efficiency can be improved.

In the above embodiment, a case has been described in which the pulse motor 47 is used as a driving means for moving the driven shaft side gear 44 along the driven shaft 43. However, the driving means is not limited to the pulse motor 47, and may be a servo motor or the like. Hydraulic pressure, pneumatic pressure, cylinders, etc. may be used, and if the length measuring device has a weft unwinding sensor, a signal emitted from the unwinding sensor or a signal when the weft reaches the side opposite to the cotton insertion side may be used. In conjunction with this, the driving means may be automatically operated to automatically change the injection timing of the pressurized water injected from the main nozzle.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to easily change the rotational phase between the cam that drives the plunger of the pump and the main shaft, and the injection timing of the pressurized water injected from the main nozzle can be adjusted. It can be easily adjusted while the loom is running.

[Brief explanation of drawings]

Fig. 1 is a partially sectional front view showing the main parts of an embodiment of the present invention, Fig. 2 is an explanatory diagram showing the configuration of a weft insertion device to which this embodiment is applied, and Fig. 3 is a conventional weft insertion device. FIG. 2 is a longitudinal cross-sectional view showing an example of a pump. 1...-Insertion pump (plunger pump) 10...
Plunger 16... Lever 19... Cam 28... Weft 1... Drive shaft 2... Main shaft side gear 3... Driven shaft 4... Driven shaft side gears 2a, 44b... Teeth Line 7: Drive means (pulse motor)

Claims (1)

[Claims] The loom includes a driven shaft side gear that meshes with a loom main shaft side gear, a cam attached to the driven shaft, a lever that is driven to swing by the rotation of the cam, and a plunger that is driven back and forth by the swing of the lever. In the weft inserting pump for a water jet loom, the tooth traces of the gear on the main shaft side of the loom and the gear on the driven shaft side are formed to be inclined with respect to the axial direction, and the pair of gears are formed relative to each other in the axial direction. A weft inserting pump for a water jet loom, characterized in that it is provided with a driving means for moving the weft to change the mutual rotational phase.