JP5521588B2 - Water injection device for water jet loom - Google Patents

Description

  The present invention relates to a water jet device in a water jet loom equipped with a pump for supplying jet water to a weft insertion nozzle.

As a water jet device in a conventional water jet loom, for example, there is a weft insertion pump device for a water jet loom disclosed in Patent Document 1.
This weft insertion pump device stores the spring by displacing the plunger against the elasticity of the spring in the plunger suction process, and performs the plunger discharge process with the stored spring, to the weft insertion nozzle. Supply jet water.
In this weft insertion pump device, a plurality of springs are provided in a double concentric manner in a spring case, and these springs are configured to act as a plurality of springs having different natural frequencies.
The weft insertion pump device disclosed in Patent Document 1 suppresses the resonance between the vibration of the spring and the pressure fluctuation of the jet water and the vibration of the pump drive system, and reduces the pressure pulsation of the jet water.

JP 2002-235261 A

However, in the weft insertion pump device disclosed in Patent Document 1, since a plurality of coil springs (springs) are housed in the spring case, there is a problem that it is difficult to assemble the coil springs.
Further, in the weft insertion pump device disclosed in Patent Document 1, since the spring force of the two coil springs is concentrated on the connecting portion between the lever that operates the plunger and the pump, the strength of the connecting portion must be sufficiently ensured. I must.
Furthermore, since a plurality of coil springs are collected in the spring case, there is a problem that the selection range of the coil springs is restricted by the installation space of the coil springs.

  The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to easily assemble each coil spring, to distribute the spring force to the connecting portion, and to freely select the coil spring. It is in providing the water-injection apparatus in a water-jet type loom with a high degree.

  In order to solve the above-described problems, the present invention provides a weft insertion nozzle for weft insertion with jet water, a weft insertion pump for pumping water to the weft insertion nozzle, and a pump housing of the weft insertion pump. A plunger that moves, a first coil spring that is provided in the pump housing and biases the plunger in the backward movement direction, a cam mechanism that drives the plunger in the forward movement direction, and a cam lever that the cam mechanism has, A first link that connects the cam lever and the plunger, a second coil spring mechanism that biases the cam lever in the backward movement direction, a second coil spring that the second coil spring mechanism has, the cam lever, and the second And a second link for connecting the coil spring mechanism.

  According to the present invention, since it is not necessary to provide both the first coil spring and the second coil spring in the pump housing, the first coil spring and the second coil spring can be assembled separately. Assembling becomes easy. Further, since the spring force of the first coil spring is distributed to the first link and the spring force of the second coil spring is distributed to the second link, the configuration of each link can be simplified, and the reliability of the water injection device can be improved. Durability is improved.

  According to the present invention, in the water injection device in the water jet loom, the first spring force adjusting means for adjusting the urging force of the first coil spring and the second urging force of the second coil spring are adjusted. Spring force adjusting means, and the first spring force adjusting means and the second spring force adjusting means may independently adjust the spring force of the first coil spring and the second coil spring.

In this case, adjustment of the biasing force of the first coil spring and the second coil spring with respect to the plunger is performed by independently adjusting the first coil spring force adjusting means and the second coil spring force adjusting means.
Since the first coil spring and the second coil spring are provided at different positions, and the adjustment position of the spring force of each coil spring is also at a different position, adjustment of the urging force with respect to the plunger is easier than before.

  According to the present invention, in the water injection device in the water injection loom, the second coil spring is a compression spring, and the second coil spring mechanism is installed on the opposite side of the cam lever from the weft insertion pump. The center line of the first coil spring and the center line of the second coil spring may cross each other.

  In this case, since the center line of the first coil spring and the center line of the second coil spring cross each other, the center line of the first coil spring and the center line of the second coil spring coincide with each other. The amount of movement of each link interposed between the cam lever that swings, the plunger that moves linearly, and the second coil spring mechanism can be reduced. Thereby, the load concerning each link is reduced and the reliability and durability of a water-injection apparatus improve.

  According to the present invention, in the water injection device in the water injection loom, the spring constant of the first coil spring may be set larger than the spring constant of the second coil spring.

  In this case, by adjusting the spring force of the second coil spring having a smaller spring constant than that of the first coil spring, fine adjustment of the urging force with respect to the plunger can be performed with higher accuracy than before.

  The present invention provides a water injection device in a water injection loom with the above-described configuration, in which each coil spring is easily assembled, the spring force is distributed to the connecting portion, and the degree of freedom of selection of the coil spring is high. can do.

It is a schematic side view of the water injection apparatus in the water injection type loom according to the first embodiment. It is sectional drawing of the weft insertion pump which concerns on 1st Embodiment. It is sectional drawing of the 2nd coil spring mechanism which concerns on 1st Embodiment. It is a schematic side view of the water-injection apparatus in the water-injection type loom according to the second embodiment. It is a schematic side view of the water-injection apparatus in the water-injection type loom according to the third embodiment. It is sectional drawing of the 2nd coil spring mechanism which concerns on 4th Embodiment.

(First embodiment)
Hereinafter, a water injection device (hereinafter referred to as “water injection device”) in a water injection loom according to a first embodiment will be described with reference to the drawings.
The water injection device shown in FIG. 1 is connected to a weft insertion nozzle 11 that wefts Y into the weft Y by the injection water, a cam mechanism 13, a weft insertion pump 12 that pumps water to the weft insertion nozzle 11, and a cam mechanism 13. And a second coil spring mechanism 14 to be connected.

The weft insertion pump 12 includes a pump housing 15 that is fixed to a machine base of a water jet loom (hereinafter referred to as “loom”).
As shown in FIG. 2, a suction port 16 and a discharge port 17 are formed in the pump housing 15. A water storage chamber 18 is formed between the suction port 16 and the discharge port 17 in the pump housing 15. A check valve 19 is provided between the suction port 16 and the water storage chamber 18, and another check valve 20 is provided between the water storage chamber 18 and the discharge port 17. One end of a suction pipe 21 is connected to the suction port 16, and the other end of the suction pipe 21 communicates with a water storage container 22. One end of a discharge pipe 23 is connected to the discharge port 17, and the other end of the discharge pipe 23 communicates with the weft insertion nozzle 11.

A cylindrical portion 24 is formed in the pump housing 15, and a bottomed cylindrical spring cap 26 is screwed to the cylindrical portion 24. A female screw portion 25 is formed on the inner peripheral surface of the cylindrical portion 24, and a male screw portion 27 is formed on the outer peripheral surface of the spring cap 26, so that the spring cap 26 can be screwed from the end of the cylindrical portion 24. It is said. The spring cap 26 is fixed to the pump housing 15 by tightening the lock nut 31 screwed into the male thread portion 27 of the spring cap 26.
A first coil spring 30 is accommodated in the spring cap 26. A through hole 28 is formed at the bottom of the spring cap 26, and a cap-side spring seat 29 is formed at the bottom.

The first cylinder 32 is fixed to the pump housing 15 so as to be positioned at the center in the cylindrical portion 24 of the pump housing 15. A plunger 33 slidable with respect to the first cylinder 32 is accommodated in the first cylinder 32.
The direction in which the plunger 33 moves away from the water storage chamber 18 is the forward movement direction of the plunger 33, and the direction in which the plunger 33 approaches the water storage chamber 18 is the backward movement direction of the plunger 33. That is, the plunger 33 reciprocates in the pump housing 15.

One end face of the plunger 33 faces the water storage chamber 18. The volume of the water storage chamber 18 varies due to the reciprocating motion of the plunger 33. One end of a connecting shaft 34 that is coaxial with the plunger 33 is connected to the other end surface of the plunger 33.
The other end of the connecting shaft 34 is provided with a connecting portion 35 that is connected to the cam mechanism 13. The connecting shaft 34 is located outside the first cylinder 32, the connecting shaft 34 passes through a bottomed cylindrical spring seat 36, and the connecting shaft 34 and the spring seat 36 are fixed to each other.
The spring seat 36 is formed in a cylindrical shape having an open end, the spring seat 36 is slidable with respect to the first cylinder 32 located inside, and the open end of the spring seat 36 extends in the radial direction. A seat-side spring seat 37 is provided.

A first coil spring 30 is interposed between the cap side spring seat 29 and the seat side spring seat 37, and the spring seat 36 is inserted through the inside of the first coil spring 30. By interposing the first coil spring 30, the first coil spring 30 biases the plunger 33 through the spring seat 36 in the backward movement direction.
Adjustment of the urging force by the first coil spring 30 is performed by changing the screwing position of the spring cap 26 with respect to the pump housing 15. When the spring cap 26 is screwed deeply into the pump housing 15, the spring force of the first coil spring 30 becomes strong and the urging force against the plunger 33 increases. On the contrary, if the spring cap 26 is shallowly screwed into the pump housing 15, the spring force of the first coil spring 30 becomes weak and the urging force against the plunger 33 decreases.
In this embodiment, the spring cap 26 and the pump housing 15 correspond to first spring force adjusting means.

Next, the cam mechanism 13 will be described. The cam mechanism 13 includes a cam lever 41. The cam lever 41 is formed in an L-shaped bent shape, extends to the weft insertion pump 12 side, a cam side arm portion 43 provided with a cam follower 42, and an extending direction of the cam side arm portion 43 And a link side arm portion 44 extending in a substantially right angle direction. A rotation shaft 45 serving as a rotation fulcrum is provided at the center of the cam lever 41.
The cam follower 42 of the cam side arm portion 43 can be freely contacted and separated from the cam 40 that rotates at a constant angular velocity in synchronization with the driving of the loom. A first link 46 that connects the weft insertion pump 12 and the cam lever 41 is connected to the link side arm portion 44.

  The first link 46 includes a link plate 47 and two connecting pins 48 and 49 provided on both ends of the link plate 47. One connecting pin 48 of the first link 46 is pivotally attached to the connecting portion 35 of the weft insertion pump 12, and the other connecting pin 49 of the first link 46 is pivotally attached to the link side arm portion 44. The weft insertion pump 12 and the cam mechanism 13 are connected via 46. The first link 46 is rotatable with respect to the cam lever 41 and the weft insertion pump 12. Since the cam lever 41 and the weft insertion pump 12 are connected by the first link 46, the rotation of the cam lever 41 is converted into the reciprocation of the plunger 33 of the weft insertion pump 12.

In this embodiment, the weft insertion pump 12 is installed on the return side of the link side arm portion 44 of the cam lever 41 (the side corresponding to the return direction of the plunger 33), and the second coil spring mechanism 14 is connected to the link side arm. It is installed on the forward movement side of the portion 44 (the side corresponding to the forward movement direction of the plunger 33).
The second coil spring mechanism 14 is a mechanism including a second coil spring 63 provided separately from the first coil spring 30 of the weft insertion pump 12.
As shown in FIG. 3, the second coil spring mechanism 14 includes a cylindrical housing 54, and the housing 54 is inserted through a through hole 51 of a bracket 50 that is fixed to a machine base of the loom. A male screw portion 55 is formed on the outer peripheral surface of the housing 54, and the two lock nuts 52 screwed into the male screw portion 55 are brought into contact with the bracket 50, whereby the housing 54 is fixed to the bracket 50. .

  A second cylinder 57 is provided inside the housing 54, and the second cylinder 57 is fixed to the housing 54 via a cylinder fixing member 56. A guide rod 59 slidable with respect to the second cylinder 57 is accommodated in the second cylinder 57. Regarding the sliding direction of the guide rod 59, the direction corresponding to the forward movement direction of the cam lever 41 is defined as the forward movement direction of the guide rod 59, and the direction corresponding to the backward movement direction of the cam lever 41 is defined as the backward movement direction of the guide rod 59. . The second cylinder 57 is formed with an annular spring seat 58 that is formed radially outward from the outer peripheral surface.

A connecting portion 60 is provided at the end of the guide rod 59 on the cam lever 41 side, and a grease nipple 61 for injecting grease is provided at the other end of the guide rod 59. The grease injected into the grease nipple 61 makes the slide of the guide rod 59 with respect to the second cylinder 57 smooth, and prevents the second cylinder 57 and the guide rod 59 from seizing.
A disc-shaped spring seat plate 62 is attached to the guide rod 59 near the cam lever 41, and a second coil spring 63 is interposed between the spring seat plate 62 and the spring seat 58. The second coil spring 63 housed in the housing 54 urges the guide rod 59 in the backward movement direction through the spring seat plate 62. In this embodiment, the ratio of the spring constants of the first coil spring 30 and the second coil spring 63 is set to 2: 1.

  As shown in FIG. 1, a second link 64 that connects between the connecting portion 60 of the second coil spring mechanism 14 and the link side arm portion 44 of the cam lever 41 is provided. The second link 64 includes a link plate 65 and two connecting pins 66 and 67 provided on both ends of the link plate 65. One connecting pin 66 of the second link 64 is pivotally attached to the link side arm portion 44, and the other connecting pin 67 of the second link 64 is pivotally attached to the connecting portion 60 of the second coil spring mechanism 14. The second coil spring mechanism 14 and the cam mechanism 13 are connected via the two links 64. The second link 64 is rotatable with respect to the cam lever 41 and the second coil spring mechanism 14, and transmits the urging force of the second coil spring 63 to the cam lever 41. Since the cam lever 41 and the second coil spring mechanism 14 are connected by the second link 64, the rotation of the cam lever 41 is converted into the reciprocating motion of the guide rod 59 of the second coil spring mechanism 14.

  The connecting pin 49 of the first link 46 and the connecting pin 66 of the second link 64 are individually pivotally attached to the link side arm portion 44. The distance between the shaft centers of the connection pin 66 of the second link 64 and the rotation shaft 45 is set equal to the distance between the shaft centers of the rotation shaft 45 and the connection pin 49 of the first link 46. In this embodiment, the weft insertion pump 12 and the second coil spring mechanism 14 have a positional relationship with respect to the cam mechanism 13 so that the center line M1 of the first coil spring 30 and the center line M2 of the second coil spring 63 cross each other. Have. Thereby, the movement range of the first link 46 and the second link 64 accompanying the rotation of the cam lever 41 is compared with the case where the center line M1 of the first coil spring 30 and the center line M2 of the second coil spring 63 do not cross each other. And set small.

Adjustment of the spring force of the second coil spring 63 is performed by changing the fixing position of the housing 54 with respect to the bracket 50. When the housing 54 is moved and fixed in the forward movement direction with respect to the bracket 50, the distance between the spring seat plate 62 and the spring seat 58 is reduced, the spring force of the second coil spring 63 is increased, and the guide rod 59 is increased. The urging force against increases. On the other hand, when the housing 54 is moved in the backward movement direction and fixed to the bracket 50, the distance between the spring seat plate 62 and the spring seat 58 is increased, and the spring force of the second coil spring 63 is weakened and the guide rod is reduced. The biasing force against 59 decreases.
In this embodiment, the housing 54, the bracket 50, and the lock nut 52 correspond to the second spring force adjusting means.

  The loom base is provided with a stopper 68 for defining a moving range of the plunger 33 provided in the weft insertion pump 12 in the backward movement direction. The stopper 68 is provided at a position facing the link side arm portion 44 of the cam lever 41, and includes an adjustment body 69 that can come into contact with the cam lever 41. The rotation range of the cam lever 41 is defined by adjusting the amount of advancement / retraction of the adjusting body 69 relative to the cam lever 41, and the movement range of the plunger 33 in the backward movement direction is defined by defining the rotation range of the cam lever 41 in the backward movement direction.

Next, the operation of this water injection device will be described.
When the cam 40 is rotated at a constant angular speed in synchronization with the operation of the loom, the cam lever 41 rotates about the rotation shaft 45 by the cooperation of the cam 40, the cam follower 42 and the first coil spring 30.
When the link arm 44 of the cam lever 41 is rotated away from the weft insertion pump 12 by the rotation of the cam 40, the plunger 33 and the spring seat 36 move against the urging force of the first coil spring 30. To do. The spring seat 36 compresses the first coil spring 30 by the forward movement, and the plunger 33 sucks a certain amount of water from the water storage container 22 through the suction pipe 21 into the water storage chamber 18 by the forward movement. During the forward movement of the plunger 33 for sucking water, the check valve 19 on the suction port 16 side is in an open state, the check valve 20 on the discharge port 17 side is closed, and water in the discharge pipe 23 is discharged. There is no backflow to the water storage chamber 18 side. The urging force of the first coil spring 30 increases in the forward movement of the plunger 33, but is transmitted to the cam lever 41 through the plunger 33 and the first link 46.

  In the second coil spring mechanism 14, when the link side arm portion 44 of the cam lever 41 is rotated away from the weft insertion pump 12 by the rotation of the cam 40, the guide rod 59 and the spring seat plate 62 are moved to the second coil spring 63. It moves forward against the urging force. The forward movement of the spring seat plate 62 compresses the second coil spring 63 because the distance between the spring seat plate 62 and the spring seat 58 is reduced. The biasing force of the second coil spring 63 increases in the forward movement of the guide rod 59, but is transmitted to the cam lever 41 through the guide rod 59 and the second link 64. The second coil spring 63 biases the guide rod 59 of the second coil spring mechanism 14 in the backward movement direction. The urging force of the second coil spring 63 urges the plunger 33 of the weft insertion pump 12 in the backward movement direction together with the urging force of the first coil spring 30 via the cam mechanism 13.

  When the cam follower 42 passes the position of the maximum diameter of the cam 40 due to the rotation of the cam 40, the cam follower 42 is separated from the cam 40. The plunger 33 receives the biasing force of the first coil spring 30 and the second coil spring 63 stored by compression, and the plunger 33 starts the forward movement by the biasing force when the cam follower 42 is separated from the cam 40. Performs backward movement to move to the position.

The plunger 33 pressurizes the water in the water storage chamber 18 by a backward movement operation. When the water in the water storage chamber 18 is pressurized by the plunger 33, the check valve 20 on the discharge port 17 side opens, and the pressurized water in the water storage chamber 18 is pumped to the weft insertion nozzle 11 through the discharge pipe 23. . When the plunger 33 moves backward, the check valve 19 on the suction port 16 side is closed, and the water in the water storage chamber 18 does not flow back to the suction pipe 21.
The water pressure-fed to the weft insertion nozzle 11 is ejected from the weft insertion nozzle 11, and the weft Y is inserted into the warp opening by this injection water. One cycle of water injection is terminated when the cam follower 42 that has been separated from the cam 40 contacts the cam 40 or the cam lever 41 contacts the stopper 68.
The solid line in FIG. 1 indicates the position of the cam lever 41 when the weft pump 12 and the plunger 33 and the guide rod 59 of the second coil spring mechanism 14 complete the forward movement, and the two-dot chain line in FIG. The position of the cam lever 41 when the plunger 33 and the guide rod 59 complete the backward movement operation is shown.

  In the water injection device of this embodiment, adjustment of the urging force with respect to the plunger 33 of the weft insertion pump 12 can be performed in each of the weft insertion pump 12 and the second coil spring mechanism 14. In the weft insertion pump 12, the biasing force of the first coil spring 30 can be adjusted by adjusting the spring force of the first coil spring 30. The spring force of the first coil spring 30 is adjusted by changing the screwing position of the spring cap 26 with respect to the pump housing 15. As the spring cap 26 is screwed deeply into the pump housing 15, the biasing force of the first coil spring 30 against the plunger 33 increases. Conversely, as the screw cap of the spring cap 26 into the pump housing 15 is made shallower, the biasing force of the first coil spring 30 against the plunger 33 decreases.

  In the second coil spring mechanism 14, the biasing force of the second coil spring 63 can be adjusted by adjusting the adjustment of the spring force of the second coil spring 63. When the housing 54 is moved and fixed in the forward movement direction with respect to the bracket 50, the distance between the spring seat plate 62 and the spring seat 58 is reduced, and the urging force of the second coil spring 63 against the guide rod 59 is increased. . On the other hand, when the housing 54 is moved and fixed in the backward movement direction, the distance between the spring seat plate 62 and the spring seat 58 is increased, and the spring force of the second coil spring 63 is weakened and attached to the guide rod 59. The power decreases.

According to this embodiment, the following effects can be obtained.
(1) Adjustment of the urging force with respect to the plunger 33 by the first coil spring 30 and the second coil spring 63 is performed by adjusting the first coil spring force adjusting means and the second coil spring force adjusting means, respectively. Since the first coil spring 30 and the second coil spring 63 are provided at different positions, and the adjustment points of the spring force of the coil springs 30 and 63 are also different positions, adjustment of the urging force with respect to the plunger 33 is conventionally performed. Easier than that. Moreover, since it is not necessary to provide both the first coil spring 30 and the second coil spring 63 in the pump housing 15, the first coil spring 30 and the second coil spring 63 can be assembled separately, which is more than conventional. Assembling of the coil springs 30 and 63 is facilitated. Further, since the spring force of the first coil spring 30 is applied to the first link 46 and the spring force of the second coil spring 63 is applied to the second link 64, the configuration of each link 46, 64 can be simplified. The reliability and durability of the water injection device are improved.
(2) The first coil spring 30 is a compression spring, and the same compression spring as the first coil spring 30 can be used as the second coil spring 63.

(3) Since the center line M1 of the first coil spring 30 and the center line M2 of the second coil spring 63 cross each other, the center line M1 of the first coil spring 30 and the center line M1 of the second coil spring 63 are Compared to the case where they match, the amount of movement of the first link 46 and the second link 64 interposed between the cam lever 41 that swings and the plunger 33 and the guide rod 59 that move linearly can be reduced. Thereby, the load concerning each link 46 and 64 is reduced, and the reliability and durability of a water-injection apparatus improve.
(4) The first coil spring 30 and the second coil spring 63 are provided at different positions, and the adjustment points of the spring force of the coil springs 30 and 63 are also different positions. The spring constant of the first coil spring 30 is The spring constant of the second coil spring 63 is set larger. Therefore, by adjusting the spring force of the second coil spring 63 having a smaller spring constant than the first coil spring 30, fine adjustment of the urging force with respect to the plunger 33 can be performed with higher accuracy than before.

(5) Since the first link 46 and the second link 64 are connected to the cam lever 41 via connection pins 49 and 66 that are individually provided, the urging force of the first coil spring 30 is the connection pin of the first link 64. 49, the urging force of the second coil spring 63 acts on the connecting pin 66 of the second link 64. For this reason, the biasing force of the first coil spring 30 and the second coil spring 63 does not concentrate on the specific coupling pin, and wear and deformation of the coupling pins 49 and 66 and the cam lever 41 due to excessive concentration of the biasing force are prevented. Can be suppressed.
(6) Since the first coil spring 30 and the second coil spring 63 are provided, the springs of the first coil spring 30 and the second coil spring 63 are prevented so as to prevent a resonance phenomenon called surging when the weft insertion pump 12 is operated. A constant can be set.

(Second Embodiment)
Next, the water injection device according to the second embodiment will be described.
The second embodiment is an example in which a tension spring is used for the second coil spring mechanism. In the second embodiment, the same or similar elements as those in the first embodiment are used in common, and the description of the first embodiment is used.

The water injection device shown in FIG. 4 includes a weft insertion nozzle 11, a weft insertion pump 12, a cam mechanism 71, and a second coil spring mechanism 72. The cam mechanism 71 includes a cam 40, a cam lever 73, a cam follower 74, and a first link 46.
The cam lever 73 includes a cam side arm portion 75 including a cam follower 74 and a link side arm portion 76 to which the first link 46 is coupled. An extended arm portion 77 is further provided at the distal end portion of the cam side arm portion 75 including the cam follower 74, and a second link 64 is connected to the distal end portion of the extended arm portion 77. Yes. The second link 64 has the same configuration as that of the first embodiment, and the connecting pin 66 of the second link 64 is pivotally attached to the extending arm portion 77. The second link 64 is connected to the extended arm portion 77 and the second coil spring mechanism 72.

  The second coil spring mechanism 72 includes a second coil spring 78, one end of the second coil spring 78 is connected to the connection pin 67 of the second link 64, and the other end is connected to the fixing member 79. And is fixed to the loom base. The second coil spring 78 is a tension spring, and is stored by the extension of the second coil spring 78, and the biasing force generated by the tension of the second coil spring 78 is transmitted to the cam lever 73. The position of the other end of the second coil spring 78 can be changed with respect to the extending and contracting direction of the second coil spring 78 by changing the position of the fixing member 79 relative to the machine base of the loom.

The biasing force of the second coil spring 78 can be adjusted by changing the fixing position of the fixing member 79 relative to the loom base. When the fixing member 79 is fixed away from the cam lever 73, the biasing force in the backward movement direction with respect to the plunger 33 increases. Conversely, when the fixing member 79 is moved closer to the cam lever 73 and fixed, the biasing force in the backward movement direction with respect to the plunger 33 decreases.
The solid line in FIG. 4 indicates the position of the cam lever 73 when the plunger 33 and the guide rod 59 of the weft insertion pump 12 and the second coil spring mechanism 14 complete the forward movement, and the two-dot chain line in FIG. The position of the cam lever 73 when the plunger 33 and the guide rod 59 complete the backward movement operation is shown.
According to this embodiment, since a tension coil spring can be used as the second coil spring 78, the coil spring that can be used in the water injection device is not limited to a compression spring.

(Third embodiment)
Next, a water injection device according to a third embodiment will be described.
The third embodiment is an example in which the center line of the first coil spring in the weft insertion pump is matched with the center line of the second coil spring in the second coil spring mechanism. In the third embodiment, the same or similar elements as those in the first embodiment are used in common, and the description of the first embodiment is used.

The water injection device shown in FIG. 5 includes a weft insertion nozzle 11, a weft insertion pump 12, a cam mechanism 81, and a second coil spring mechanism 14. Each configuration of the weft insertion nozzle 11, the weft insertion pump 12, and the second coil spring mechanism 14 is the same as that of the first embodiment.
The cam mechanism 81 includes a cam 40, a cam lever 41, a first link 46 and a second link 64. The weft insertion pump 12 and the second coil spring mechanism 14 are disposed so as to face each other so that the axis of the plunger 33 and the axis of the guide rod 59 coincide with each other, and between the weft insertion pump 12 and the second coil spring mechanism 14. The link side arm portion 44 of the cam lever 41 is located. Since the axial center of the plunger 33 of the weft insertion pump 12 and the axial center of the guide rod 59 of the second coil spring mechanism 14 are arranged opposite to each other, the center line M1 of the first coil spring 30 and the second coil The center line M2 of the spring 63 coincides.

The first link 46 and the second link 64 are provided in the link side arm portion 44, the first link 46 connects the cam mechanism 81 and the weft insertion pump 12, and the second link 64 connects the second coil spring mechanism 14 and the cam mechanism. 81 is connected.
The solid line in FIG. 5 indicates the position of the cam lever 41 when the weft pump 12 and the plunger 33 of the second coil spring mechanism 14 and the guide rod 59 complete the forward movement, and the two-dot chain line in FIG. The position of the cam lever 41 when the plunger 33 and the guide rod 59 complete the backward movement operation is shown. In the state of the cam lever 41 at the time when the plunger 33 and the guide rod 59 complete the forward movement, the axis of each of the connecting pins 48, 49, 66, 67 is the center line M 1 of the first coil spring 30 and the second coil spring 63. , M2, and the first link 46 and the second link 64 are linearly arranged.

  In the state of the cam lever 41 at the time when the backward movement of the plunger 33 and the guide rod 59 is completed, the axis of the connecting pin 66 of the second link 64 pivotally attached to the cam lever 41 is the center line M1 of the first coil spring 30. Also, the center line M2 of the second coil spring 63 does not match. At this time, since the second link 64 is inclined, the guide rod 59 of the second coil spring mechanism 14 is not inclined.

In this embodiment, the cam lever 41 in which the first link 46 and the second link 64 are linearly arranged with each other when the forward movement of the plunger 33 and the guide rod 59 of the weft insertion pump 12 and the second coil spring mechanism 14 is completed. The configuration is as follows. Not limited to this configuration, for example, a configuration of a cam lever in which the first link 46 and the second link 64 are linearly arranged with each other when the backward movement of the plunger 33 and the guide rod 59 is completed may be employed.
According to 3rd Embodiment, there exists an effect other than (3) among effect (1)-(6) of 1st Embodiment.

(Fourth embodiment)
Next, a water injection device according to a fourth embodiment will be described.
The fourth embodiment is an example in which the configuration of the second coil spring force adjusting means of the second coil spring mechanism is different from the first embodiment. In the fourth embodiment, the same or similar elements as those in the first embodiment are used in common, and the description of the first embodiment is used.

  As shown in FIG. 6, the second coil spring mechanism 91 includes a bottomed cylindrical housing 92 that is fixed to the machine base of the loom via bolts (not shown). A screw hole 93 is formed in the bottom of the housing 92, and a cylindrical cylinder fixing member 94 is screwed into the screw hole 93. A male screw portion 95 is formed on the outer periphery of the cylinder fixing member 94, and the male screw portion 95 is screwed into the screw hole 93. The cylinder fixing member 94 is fixed to the housing 92 by a lock nut 96 screwed into the male screw portion 95 of the cylinder fixing member 94 being brought into contact with the housing 92.

  A second cylinder 57 is attached to the end of the cylinder fixing member 94 in the housing 92, and a guide rod 59 slidable with respect to the second cylinder 57 is accommodated in the second cylinder 57. Yes. Regarding the sliding direction of the guide rod 59, the direction corresponding to the forward movement direction of the cam lever 41 is defined as the forward movement direction of the guide rod 59, and the direction corresponding to the backward movement direction of the cam lever 41 is defined as the backward movement direction of the guide rod 59. . The second cylinder 57 is formed with an annular spring seat 58 that is formed radially outward from the outer peripheral surface.

  A connecting portion 60 is provided at the end of the guide rod 59 on the cam lever 41 side, and a grease nipple 61 is provided at the other end of the guide rod 59. A disc-shaped spring seat plate 62 is attached near the connecting portion 60 of the guide rod 59, and a second coil spring 63 is interposed between the spring seat plate 62 and the spring seat 58. The second coil spring 63 urges the guide rod 59 in the forward direction through the spring seat plate 62.

In this embodiment, the spring force of the second coil spring 63 can be adjusted by changing the position of the cylinder fixing member 94 with respect to the housing 92. Therefore, in this embodiment, the housing 92 and the cylinder fixing member 94 correspond to the first spring force adjusting means.
For this reason, the spring force of the second coil spring 63 can be adjusted after the housing 92 of the second coil spring mechanism 91 is fixed to the machine base of the loom, and the spring force is adjusted rather than the adjustment of the spring force that changes the position of the housing. The adjustment work becomes easier.

The water injection device according to the above embodiment shows an embodiment of the present invention, and the present invention is not limited to the above embodiment, and the scope of the gist of the invention is as follows. Various modifications can be made within.
In the above first to fourth embodiments, the ratio of the spring constants of the first coil spring and the second coil spring is 2: 1, but the ratio of the spring constants of the first coil spring and the second coil spring is It is possible to set suitably according to conditions, without being limited to 2: 1. For example, the first coil spring and the second coil spring may be the same coil spring.
In the second embodiment described above, the second coil spring, which is a tension spring, is provided at the distal end portion where the cam side arm portion of the cam lever is extended. However, the present invention is not limited to this example. A tension spring may be provided near the stopper of the second coil spring. Alternatively, it is also possible to provide a tension coil spring at a position that functions as a second coil spring by providing a cam side arm part and a link side arm part in the cam lever.

11 Weft insertion nozzle 12 Weft insertion pump 13, 71, 81 Cam mechanism 14, 72, 91 Second coil spring mechanism 15 Pump housing 18 Water storage chamber 26 Spring cap 30 First coil spring 32 First cylinder 33 Plunger 35, 60 Connecting portion 40 Cam 41, 73 Cam lever 45 Rotating shaft 46 First link 54 Housing 57 Second cylinder 59 Guide rod 60 Connecting portion 63, 78 Second coil spring 64 Second link 77 Extension arm portion 79 Fixing member Y Wefts M1, M2 Center line

Claims (4)

A weft insertion nozzle for weft insertion with jet water,
A weft insertion pump for pumping water to the weft insertion nozzle;
A plunger that reciprocates in the pump housing of the weft insertion pump;
A first coil spring provided in the pump housing and biasing the plunger in the backward movement direction;
A cam mechanism for driving the plunger in the forward movement direction;
A cam lever of the cam mechanism;
A first link connecting the cam lever and the plunger;
A second coil spring mechanism for urging the cam lever in the backward movement direction;
A second coil spring included in the second coil spring mechanism;
A water injection device for a water injection loom, comprising: the cam lever; and a second link connecting the second coil spring mechanism.   A first spring force adjusting means for adjusting an urging force of the first coil spring; and a second spring force adjusting means for adjusting an urging force of the second coil spring, the first spring force adjusting means and the first spring force adjusting means. 2. The water jet device in the water jet loom according to claim 1, wherein the two spring force adjusting means can independently adjust the spring force of the first coil spring and the second coil spring. The second coil spring is a compression spring, and the second coil spring mechanism is installed on the side of the cam lever opposite to the weft insertion pump,
The water jet apparatus in the water jet loom according to claim 1 or 2, wherein a center line of the first coil spring and a center line of the second coil spring are obliquely crossed.   4. The water ejection device for a water ejection loom according to claim 1, wherein a spring constant of the first coil spring is set larger than a spring constant of the second coil spring.