JP6014644B2 - Lever type liquid ejector - Google Patents

Description

  The present invention relates to a lever-type liquid ejecting apparatus that starts and stops liquid spraying only by operating a lever, and changes the spray form (injection angle) of a liquid into a plurality by changing the grip amount of the lever. The present invention relates to a gun-type lever-type liquid ejecting apparatus that facilitates and corrects angle adjustment.

  As a conventional example of the lever-type liquid ejecting apparatus, there is one disclosed in Patent Document 1 below. The lever-type liquid ejecting apparatus described in the same document was developed by the present applicant, and is attached to a main body having a gripping portion, and is operated by operating the lever biased in the return direction by a spring. The spray amount adjusting body built in the main body is operated.

  The lever can be pivoted about a support shaft. By adjusting the amount of grip (rotation amount) of the lever, the operating position of the spray amount adjusting body can be changed to change the lever position from the nozzle at the tip of the main unit. The form (injection angle) of the jet water flow is changed.

  The lever can be locked to the main body step by step at a plurality of positions where the operating positions of the spray amount adjusting body are different, and the locked state at each operation position can be maintained. Holding of the locked state at each operation position of the lever is performed by a multistage locking mechanism provided between the lever and the grip portion.

  The spray amount adjusting body of the lever-type liquid ejecting apparatus described in Patent Document 1 is configured by combining an on-off valve and a rectifying valve.

  The on-off valve is provided with a valve body that is biased in the valve closing direction by a spring on a valve shaft that is pulled by lever operation, and opens and closes the flow path by bringing the valve body into and out of contact with a fixed seat.

  The valve shaft penetrates the rear wall of the linkage that transmits the movement of the lever to the valve shaft, and the adjustment nut is screwed to the rear end that passes through the rear wall, and the adjustment nut is connected to the rear wall of the linkage. It is made to contact.

  The rectifying valve connects a valve body urged in a valve closing direction by a spring to a pull shaft connected to the valve shaft by causing play of axial relative movement, and the valve body is used as a rectifying plate also serving as a valve seat. The opening state of the valve hole provided in the rectifying plate is changed by contacting and separating. In addition to the valve hole, the rectifying plate is provided with a communication hole connected to a normally open spiral groove formed in the rectifying core (which is in the liquid supply path downstream of the rectifying valve).

  The valve hole of the rectifying plate is shaped to prevent complete blockage by the valve body so that a small amount of liquid flows even when the valve body returns to the closed position and is in contact with the rectifying plate. It has become.

  When the lever is pulled, the spray amount adjusting body configured in this way pulls the valve shaft so that the valve body provided on the valve shaft separates from the valve seat and opens the on-off valve.

  However, when the on-off valve begins to open, the valve body of the rectifying valve does not follow the movement of the pull shaft that moves backward together with the valve shaft until there is no axial play with the pull shaft. Therefore, at a stage where the lever operation amount is small, the liquid flowing through the communication hole of the rectifying plate and the spiral groove of the rectifying core and the liquid flowing out from the valve hole which is incompletely blocked are mixed to increase the injection angle. Wide angle injection is made.

  Further, when the lever operation amount increases beyond a predetermined amount, the valve portion of the rectifying plate also opens and the amount of liquid flowing out from the valve hole increases, and the injection angle decreases as the increase amount increases.

Japanese Patent No. 5412659

  In the lever-type liquid ejecting apparatus of Patent Document 1, the lever operation position is held at three positions by the multistage locking mechanism, and the wide-spreading ejection is performed when the ejection mode is the first holding position counted from the lever side. The narrow-angle injection at the holding position, and the injection angle at the third holding position change in the order of direct injection at approximately 0 degrees.

  In this device, when the screwing amount of the adjusting nut screwed into the rear end of the valve shaft is changed, the operation amount (= the valve shaft retraction amount) from the initial lever position to each lever holding position changes. The opening degree of the opening / closing valve when the lever is in each holding position changes.

  On the other hand, the amount of movement of the pull shaft (= the amount of movement of the valve shaft) until the valve body of the rectifying valve moves away from the rectifying plate is always constant regardless of the screwing amount of the adjusting nut.

  For this purpose, the setting of the position at which the lever is held, and the relationship between the opening amount of the on-off valve and the opening amount of the rectifying valve when the lever is held at the second and third holding positions, respectively, It was difficult to adjust accurately.

  That is, the opening amount of the on-off valve when the lever is held at the first to third positions can be adjusted by operating the adjusting nut. In addition, when the lever is held in the first position, the valve body of the rectifying valve is in contact with the rectifying plate. The amount of play in the axial relative movement between the pull shaft and the valve body of the rectifying valve is It can be created by ensuring enough.

  However, the opening amount of the rectifying valve is determined by the retracting amount of the pull shaft (= the retracting amount of the valve shaft) regardless of the opening amount of the on-off valve, so the lever is held at the first and subsequent holding points. It is not easy to adjust the valve opening amount of the rectifying valve at the position to an amount corresponding to the valve opening amount of the on-off valve adjusted by the adjusting nut.

  Optimizing the injection angle when the lever is held at the first and subsequent holding points only by optimizing the amount of play in the axial relative movement between the pull shaft and the valve body of the rectifying valve and adjusting with the adjusting nut. It is difficult to make it.

  The ejection angle also depends on the liquid supply pressure. The valve opening amount of the on-off valve can be adjusted to an optimum value according to the supply pressure of the liquid by the adjusting nut. However, if the valve opening amount of the rectifying valve is not appropriate, the injection angle does not become an ideal angle.

  SUMMARY OF THE INVENTION An object of the present invention is to make it possible to easily and accurately adjust the ejection angle of a lever-type liquid ejecting apparatus.

  In order to solve the above problems, in the present invention, the spray amount adjusting body incorporated in the main body is operated by a lever attached to the main body, and the form of the jet water flow from the nozzle portion at the tip of the main body is set according to the grip amount of the lever The spray amount adjusting body of the lever type liquid ejecting apparatus to be changed is configured as follows.

  That is, the spray amount adjusting body includes a valve seat, a valve body, a hollow valve shaft that is moved backward by a lever operation, and an on-off valve having a spring that biases the valve body in a valve closing direction, It comprised with the rectifier valve arrange | positioned downstream.

Further, the rectifying valve has a valve hole having a recess at the hole edge and a normally open communicating hole connected to a spiral groove downstream of the rectifying valve, and a rectifying plate also serving as a valve seat, and is brought into contact with and separated from the rectifying plate A valve body and a valve having a spring that biases the valve body in the valve closing direction,
The valve body of the rectifying valve is connected to the front end of a pull shaft that is fluid-tightly and slidably passed through the hollow valve shaft, and an adjustment nut is attached to the rear end of the pull shaft that protrudes rearward of the hollow valve shaft. And the gap between the hollow valve shaft and the adjustment nut (the gap is adjusted so that the adjustment nut can be changed by adjusting the screwing amount of the adjustment nut from the rear end of the hollow valve shaft. The rectifying valve is operated by the pull shaft following the movement of the hollow valve shaft from the zero position.

  Such a liquid ejecting apparatus includes a connection point adjusting mechanism for providing a connection for transmitting the movement of the lever to the hollow valve shaft, and changing a connection point of the connection to the hollow valve shaft in an axial direction of the hollow valve shaft. And preferred.

  In the lever-type liquid ejecting apparatus of the present invention, the hollow valve shaft that pulls the valve body of the on-off valve and the pull shaft that pulls the valve body of the rectifying valve are made independent, and the hollow valve shaft and the above-mentioned are adjusted by adjusting the screwing amount of the adjusting nut. The gap between the adjustment nut screwed to the pull shaft can be changed.

  By adjusting the clearance, the relationship between the opening amount of the rectifying valve and the opening amount of the on-off valve can be freely changed, and the follow-up timing of the pull shaft with respect to the pulling movement of the hollow valve shaft can be changed. Can be adjusted accurately.

  Further, since the valve opening amount of the rectifying valve only needs to be adjusted by adjusting the screwing amount of the adjusting nut, the adjusting operation is simple.

FIG. 3 is an enlarged longitudinal sectional view showing an embodiment of the lever type liquid ejecting apparatus according to the present invention when the ejection is stopped. FIG. 2 is a side view of the lever type liquid ejecting apparatus of FIG. 1. FIG. 2 is a plan view of the lever type liquid ejecting apparatus of FIG. 1. It is a longitudinal cross-sectional view which expands and shows the on-off valve and the rectifier valve of the lever-type liquid ejecting apparatus of FIG. It is a front view of the baffle plate contained in the rectifier valve. FIG. 2 is an exploded perspective view of a multistage locking mechanism for holding a switching position of a lever included in the lever type liquid ejecting apparatus of FIG. 1. It is a front view of the multistage locking mechanism of FIG. FIG. 2 is an enlarged longitudinal sectional view of a multistage locking mechanism provided in the lever type liquid ejecting apparatus of FIG. 1. It is sectional drawing which shows the open state {the figure (b)} of the rectifier valve and the open state {the figure (c)} of the on-off valve when the ratchet pawl is in the initial position {the figure (a)}. The open state {the same figure (b)} of the rectifying valve and the open state {the same figure (c)} at the position {the figure (a)} where the ratchet claw is engaged with the first locking claw are shown. It is sectional drawing. The open state of the rectifying valve {FIG. (B)} and the open state of the on-off valve {FIG. (C)} at the position {FIG. (A)} where the ratchet pawl is engaged with the second locking pawl are shown. It is sectional drawing. The open state of the rectifying valve {FIG. (B)} and the open state of the on-off valve {FIG. (C)} at the position {FIG. (A)} where the ratchet pawl is engaged with the third locking pawl are shown. It is sectional drawing. The open state of the rectifying valve {FIG. (B)} and the open state of the on-off valve {FIG. (C)} are shown at the position {FIG. (A)} where the ratchet pawl is engaged with the fourth locking pawl. It is sectional drawing. It is explanatory drawing which decomposes | disassembles and shows the operation | movement process of a ratchet nail | claw in seven steps of I-VII.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  As shown in FIGS. 1 to 3, the exemplary lever-type liquid ejecting apparatus 1 has a nozzle portion 3 at the distal end portion of a main body 2 having a grip portion 2 a.

  The main body 2 has a liquid supply path 4 extending in the axial direction therein, and a spray amount adjusting body that is opened and closed by an operation of a lever 5 attached to the main body 2 is provided in the liquid supply path 4.

  The spray amount adjusting body includes an on-off valve 6 and a rectifying valve 7 disposed downstream of the on-off valve 6 (the side where the nozzle portion is present is downstream).

  The rectifying valve 7 is a valve that opens and closes in conjunction with the opening / closing valve 6, and the opening degree of the rectifying valve 7 can be changed by changing the grip amount of the lever 5. The form of the jet water flow from the nozzle part 3 changes with the change of the opening degree.

  As shown in FIGS. 1 and 2, the main body 2 is connected to a cylindrical main cylinder 2b provided at the rear end with a grip portion 2a projecting obliquely rearward and downward so as to extend to the front end side of the main cylinder 2b. And a cylindrical holder 2c.

  The cylindrical rear part of the holder 2c is fitted on the small diameter part at the tip of the main cylinder 2b, and the main cylinder 2b and the holder 2c are concentrically coupled by a retaining ring 9 of the fitting part. The main cylinder 2b and the holder 2c Is a liquid supply path 4 communicating in the axial direction. The outside of the nozzle portion 3 provided at the tip of the holder 2c is covered with a hood 10.

  A flow path 11 provided in the grip portion 2a communicates with the liquid supply path 4 of the main cylinder 2b, and an on-off valve 6 is provided downstream of the junction of both paths. The rectifying valve 7 is provided in the liquid supply path 4 in the holder 2c.

  The on-off valve 6 is formed by combining a cylindrical valve seat 6a and a valve body 6b. The valve body 6b is provided at the tip of the hollow valve shaft 6c. The valve body 6b is brought into contact with and separated from the valve seat 6a to open and close the valve hole of the valve seat 6a, so that the liquid supply path 4 is connected to and disconnected from the flow path 11.

  A spring presser 12 is fitted on the hollow valve shaft 6c in a liquid-tight and slidable manner. The spring presser 12 is screwed in a liquid-tight manner to the main cylinder 2b so that the rear end of the liquid supply path 4 is sealed. Yes.

  The hollow valve shaft 6 c and the valve body 6 b of the on-off valve 6 provided on the shaft are always urged in the valve closing direction by a spring 6 d that is contracted between the spring presser 12.

  The lever 5 for operating the spray amount adjusting body is formed in a shape having a U-shaped section that is long in the vertical direction and having a clevis portion (bifurcated portion) 5a at the upper end.

  As shown in FIGS. 2 and 3, the clevis portion 5a at the upper end of the lever 5 is inserted into the outer side of the main tube 2b in front of the grip portion 2a and connected to a connecting portion 13 provided on the upper portion of the main tube 2b. They are connected by a shaft 14.

  Thereby, the lever 5 can be rotated in a direction approaching or separating from the grip portion 2a with the connecting shaft 14 as a fulcrum.

  As shown in FIG. 3, a linkage 15 bent into a U-shape in plan view as shown in FIG. 3 is installed outside the main cylinder 2b, and the left and right free ends of the linkage 15 are connected to the lever 5 as shown in FIG. The clevis portion 5a is pivotally connected using a pin 16 in the vicinity of the upper end thereof.

  Further, as shown in FIG. 1, a protruding portion from the spring retainer 12 of the hollow valve shaft 6 c is passed through a through hole provided in the rear end wall of the linkage 15, and the protruding portion is connected to the rear end wall of the linkage 15. It is connected.

  The connection is made by a connection point adjusting mechanism 8. The connecting point adjusting mechanism 8 shown in the figure has two lock nuts 8a and 8a threadedly engaged with a male screw on the outer periphery of the rear part of the hollow valve shaft 6c, and the two lock nuts 8a and 8a serve to connect the rear end wall of the linkage 15. It is to be sandwiched from the front and back.

  According to this connection structure, the connection point of the linkage 15 to the hollow valve shaft 6c is changed in the axial direction of the hollow valve shaft 6c to adjust the valve opening amount of the on-off valve 6 at the position where the lever 5 is held. Therefore, there is a degree of freedom in setting the holding position of the lever 5.

  A pull shaft 18 is passed through the hole of the hollow valve shaft 6c in a fluid-tight and slidable manner, and an adjustment nut 17 for adjusting the valve opening amount of the rectifying valve 7 is attached to the rear end of the pull shaft 18. Has been.

  As shown in FIG. 1, a gap g is formed between the adjusting nut 17 and the rear end of the hollow valve shaft 6c by adjusting the screwing of the adjusting nut 17 when the on-off valve 6 is closed. In addition, by changing the size of the gap g, the relationship between the opening degree of the on-off valve 6 and the rectifying valve 7 can be adjusted.

  The linkage 15 connected to the lever 5 is held in a closed position where the valve body 6b of the on-off valve 6 is in contact with the valve seat 6a when the lever is not operated. Hold in the initial position where it will be in a drooping position.

  When the lever 5 is operated from this initial position and rotated to the grip 2a side, the hollow valve shaft 6c moves rearward while compressing the spring 6d, whereby the valve body 6b opens and closes away from the valve seat 6a. Valve 6 opens.

  When the hollow valve shaft 6c is further retracted from the position where the gap g becomes zero, the pull shaft 18 is pulled and the rectifying valve 7 is operated.

  As shown in FIG. 4, the rectifying valve 7 is provided with a rectifying plate 7a also serving as a valve seat in the middle of the liquid supply path 4 in the holder 2c, and the pulling valve 7 is located upstream of the rectifying plate 7a on the upstream side of the liquid supply path 4. The shaft 18 is incorporated so as to be movable in the axial direction, and a valve body (poppet) 7b for opening and closing the valve hole 7c of the rectifying plate 7a is provided at the tip of the pull shaft 18.

  The rectifying plate 7a is provided with a communication hole 7d (see FIG. 5) connected to a normally open spiral groove (not shown; this is provided in the rectifying core 3a) that generates a spiral flow. Further, the valve hole 7c of the rectifying plate 7a is formed with a recess 19 (see FIG. 5) formed on the inner periphery to avoid complete blockage by the valve body 7b, and the valve body 7b is closed. The liquid flow is generated by the recess 19 also when returning to the position and in contact with the current plate 7a.

  The valve body 7 b is attached to the tip of the pull shaft 18. The valve body 7b is attached with pins 20 projecting radially outward from both ends of the valve body 7b. A spring 7e is contracted between the pin 20 and the main cylinder 2b, and the spring 7e. With this force, the valve body 7b is urged in the valve closing direction (forward) and pressed against the rectifying plate 7a.

  The illustrated structure in which the pin 20 is provided and the force of the spring 7e is applied to the valve body 7b via the pin is preferable because the liquid flow is not hindered.

  As described above, the spray amount adjusting body including the on-off valve 6 and the rectifying valve 7 includes the hollow valve shaft 6c separated from the pull shaft 18, and the movement of the hollow valve shaft 6c starts to move from the initial position. The rectifying valve 7 that opens and closes in synchronism with the on-off valve 6 is constructed by generating a timing shift and transmitted to the pull shaft 18 at the beginning, and when the on-off valve 6 is opened, the valve body 7b is connected to the rectifying plate. The state in contact with 7a can be maintained.

  The nozzle unit 3 inserts a cylindrical rectifying core 3a into the liquid supply path 4 downstream of the rectifying valve 7, and superimposes the ejection plate 3b on the flange at the tip of the rectification core 3a. It is structured to be fastened and fixed with a cap 3c screwed into the holder 2c.

  The rectifying core 3a is provided with the above-described normally open swivel groove (not shown), and a liquid is passed through the groove to generate a spiral flow that flows out of the jet plate 3b.

  The jet plate 3b has a conical shape protruding forward, and sprays or jets liquid from the nozzle hole 3d provided at the tip.

  The structures of the rectifying valve 7 and the nozzle portion 3 are described in detail in Japanese Patent Application Laid-Open No. 2008-110318.

  Between the grip part 2a and the lever 5, the multi-stage locking mechanism 21 that locks the lever 5 that has actuated the on-off valve 6 at a plurality of positions with different opening degrees of the on-off valve 6 and holds them at the respective locking positions. Is provided.

  The multistage locking mechanism 21 includes a plurality of locking claws 22, a ratchet claw 23 that can be engaged with and disengaged from each locking claw 22, and an elastic body that biases the ratchet claw in the locking direction (shown in the figure). It has a wire spring 25). The ratchet claw 23 of the prototype liquid ejecting apparatus is a resin molded product.

  The locking claw 22 is a mountain whose front surface is an inclined surface with the front surface lowered, and the rear surface which is the engagement surface is a standing surface with no inclination. Is provided.

  The four locking claws 22 are arranged at substantially equal pitches, so that the lever-type liquid ejecting apparatus 1 in the illustrated lever-type liquid ejecting apparatus 1 has the latching claw 23 locked on the right side in FIG. The ejection angle of the liquid ejected from the nozzle unit 3 decreases as the distance goes to.

  FIGS. 9 to 13 show the latching position of the ratchet pawl 23 with respect to the latching claw 22 and the opening change state of the rectifying valve 7 and the on-off valve 6 at each locking position at this time. Details of the state of injection in these figures will be described later. 9 to 13 are views in which the recess 19 of the rectifying plate 7a is omitted.

  The locking claw 22 may be three ridges. Although four or more ridges may be provided, the grip amount that the lever 5 can be set, the area of the engaging surface of the locking claw 22 is secured, the locking stability of the ratchet claw with respect to the locking claw, and the diversification of the injection pattern Considering these factors, 4 mountains are optimal.

  The illustrated lever-type liquid ejecting apparatus 1 has a holding claw case 25 made of resin, which is processed separately from the main body 2, attached to the grip portion 2 a and a locking claw 22 is formed in the locking claw case 25. However, the locking claw 22 may be formed directly on the grip portion 2a.

  The ratchet pawl 23 is rotatably attached to the lever 5 using a support shaft (that is, a pin in the drawing) 26 that serves as a rotation fulcrum. The ratchet pawl 23 extends toward the grip portion 2a. A downward claw 23a is provided at the tip of the extended portion, and a stopper 23b for restricting its own return rotation is provided below the lever side end. Is provided.

  Further, a columnar slider 27 is provided on the upper end of the extended portion (see FIGS. 6 and 7). The slider 27 is provided so that a rib 28 having a narrower width than that of the extended portion is provided on the upper surface of the extended portion, and the upper end of the rib 28 protrudes from both sides of the rib to the left and right. Is formed integrally with the ratchet claw 23.

  The claw 23a is pushed up to the front lower front surface of the locking claw 22 when the lever 5 is gripped and operated in the direction in which the on-off valve 6 opens, overcoming the locking claw 22 while elastically deforming the elastic body 24. The elastic body 24 is lowered to the engagement point with the locking claw 22 by the elastic restoring force of the elastic body 24 and is held at the engagement position.

  By increasing the grip amount (rotation amount) of the lever 5, the engagement point of the ratchet claw 23 (claw 23a) with respect to the locking claw 22 becomes the second locking claw, the third locking claw, the fourth engagement. Move in the order of the claws.

  Further, when the lever 5 is further grasped from the position where the ratchet claw 23 is engaged with the fourth locking claw 22, the disengagement mechanism included in the multistage locking mechanism 21 is operated to ratchet the locking claw 22. The claw 23 is disengaged.

  The disengagement mechanism is a mechanism constituted by two members: a cam surface 29 formed on the ratchet claw 23 and a first locking claw 22.

  When the lever 5 is further grasped from the position where the ratchet claw 23 is engaged with the fifth locking claw 22, as shown in FIG. 14 (I), the first locking claw counted by the cam surface 29 from the lever side. The ratchet pawl 23 rotates counterclockwise in FIGS. 1 and 14 when the lever 5 is further gripped as shown in FIG. 14 (II) by the action of the cam surface 29. To do.

  As a result, the ratchet claw 23 is detached from the fourth locking claw 22, and the slider 27 provided on the ratchet claw 23 is guided to the return path 30.

  The multistage locking mechanism 21 also includes a guiding mechanism that guides the slider 27 through the return path 30 to the initial position. The guide mechanism shown in the figure is a combination of a guide 31 provided on the gripping portion 2 a side above the locking claw 22, the slider 27, and a retrograde prevention portion 32 of the ratchet claw 23. .

  The guide 31 is a plate-like member that is long in the front-rear direction, and a passage on the upper surface side of the guide 31 is a return path 30. The two guides 31 are arranged in parallel on two inner surfaces of the engaging claw case 25 facing each other, and the ribs 28 of the ratchet claw 23 pass between the two guides 31, 31. The slider 27 passes over the guide 31.

  The retrograde prevention unit 32 is configured by combining a slider 27, a moving path 33 through which the slider 27 passes, and a stopper 34 provided across the moving path 33 in the longitudinal direction of the moving path. .

  The stopper 34 has an outer peripheral surface having a convex arc shape in a side view, and the stopper 34 protrudes toward the guide 31 to narrow the width of the moving path 33 between the stopper 31. The apex (protrusion end) of the outer circumferential surface of the convex arc of the stopper 34 is at the start end side (on the locking claw 22) of the moving path 33 from the portion where the slider 27 contacts the stopper 34 at the position where the lever 5 is gripped to the maximum. It is arranged on the near side.

  The slider 27 comes into contact with the stopper 34 immediately before the gripping of the lever 5 becomes maximum {see (I) in FIG. 14}. Then, it rides on the stopper 34 by further gripping the lever 5 {see (II) in FIG. 14}. In the guide mechanism of the embodiment, the ratchet pawl 23 is bent by the ride-up, and the stopper 34 is overcome by grasping the lever 5 until the end point of grasping (see (III) in FIG. 14).

  The slider 27 that has passed over the stopper 34 is guided to the outer circumferential surface of the convex arc of the stopper 34 and guided to the return path 30 (see (IV) in FIG. 14).

  In the illustrated anti-reverse unit 32, when the slider 27 gets over the stopper 34, the ratchet pawl 23 is elastically restored and returns to its original shape.

  The slider 27 that has passed over the stopper 34 is prevented from getting over the stopper 34 in the reverse direction because the stopper 34 becomes an obstacle. Thereby, the retrograde (reverse rotation) of the ratchet claw 23 is prevented.

  When the lever 5 is released at the position where the slider 27 moves to the return path 30, the lever 5 is pulled back to the initial position side with the ratchet pawl 23 by the force of the spring 6d (see (V to VII) in FIG. 14). }. Therefore, the slider 27 of the ratchet pawl 23 returns through the return path 30, and the return of the lever 5 to the initial position closes the on-off valve 6 and returns to the spray stop state.

  In addition, the guidance mechanism which guides the ratchet nail | claw 23 to the inward path 30 by preventing a retrograde is not limited to the thing of illustration. It may be as described in the aforementioned Patent Document 1.

  The lever type liquid ejecting apparatus 1 according to the embodiment has the above-described configuration. FIG. 1 shows a state of the apparatus when the liquid is stopped without injecting the liquid. In the initial state where the ratchet claw 23 is not engaged with the locking claw 22, the on-off valve 6 is closed. In the rectifying valve 7, the valve body 7 b is pressed against the rectifying plate 7 a by the force of the spring 7 e. However, since the rectifying valve 7 has the recess 19 on the inner periphery of the valve hole, the liquid can pass through the recess 19. it can.

  However, since the liquid is not introduced into the liquid supply path 4 when the on-off valve 6 is closed, the spraying is stopped. The prototype device has a distance L = 14 mm from the spring retainer 12 to the rear end of the hollow valve shaft 6c at this time.

  Next, when the lever 5 is operated to lock the ratchet pawl 23 with the first pawl 22, the on-off valve 6 is opened. However, at this time, the valve element 7b of the rectifying valve 7 is still pressed against the rectifying plate 7a (see FIG. 10). The prototype is the valve gap of the rectifying valve 7 at this position = 0 mm, and the distance L = 15 mm The valve gap is the axial gap between the valve body and the valve seat).

  For this purpose, the liquid that has flowed into the spiral groove of the rectifying core 3a via the communication hole 7d of the rectifying plate 7a and the liquid that has passed through the recess 19 in the inner periphery of the valve hole join together in the jet plate 3b. It diffuses widely from the nozzle hole 3d and is injected to the outside. The exemplary apparatus has an injection angle of about 70 ° at this time.

  The ejection angle is obtained by visually checking the diffusion state of the liquid ejected from the nozzle portion with the scale of the protractor disposed on the side (the same applies to the following). Since it is difficult to measure the exact angle, the measured value is rough.

  When the lever 5 is grasped and the ratchet claw 23 is engaged with the engagement claw 22 on the second surface, the valve part of the rectifying valve 7 is also slightly opened (the prototype is the valve part gap at this position = 0.15 mm). , The distance L = 15.5 mm). As a result, the flow rate of the straight flow (the liquid passing through the valve portion of the rectifying valve 7 becomes a straight flow) increases, and the spray angle of the liquid sprayed from the nozzle portion 3 changes to about 40 ° (see FIG. 11). ).

  When the ratchet pawl 23 is engaged with the third pawl 22, the valve opening amount of the rectifying valve 7 increases (the valve gap at this position = 0.45 mm, the distance L = 15). 0.9 mm) the flow rate of the straight flow further increases, and the liquid injection angle changes to about 20 ° (see FIG. 12).

  When the ratchet claw 23 is locked to the locking claw 22 on the fourth surface (the valve portion gap at this position = 1.1 mm, the distance L = 16.5 mm), the injection angle is approximately 0 °. It becomes direct shot (see FIG. 13).

  When the lever 5 is further grasped from the direct position, the ratchet claw 23 is disengaged from the locking claw 22 as described above, and the slider 27 of the ratchet claw 23 is moved to the position where the lever 5 is grasped to the maximum. Go over the stopper 34 and move to the return path 30.

  Thereafter, when the lever 5 is released, the lever 5 and the ratchet pawl 23 return to their initial positions and postures. Therefore, it is possible to switch the spray form and hold the switched spray form by operating the lever with one hand.

  As described above, the liquid ejecting apparatus of the present invention has a structure in which the pull shaft 18 is made independent of the hollow valve shaft 6c, and the movement of the hollow valve shaft 6c is transmitted to the pull shaft 18 with a timing shift at the initial stage of lever operation. A spray amount adjusting body is provided. By simply operating the adjusting nut 17 and simply changing the size of the gap g between the hollow valve shaft 6c and the valve opening timing and the valve opening amount, The valve opening timing and valve opening amount of the rectifying valve 7 can be adjusted.

  Accordingly, the injection angle can be accurately adjusted to the best state by changing the follow-up timing of the pull shaft with respect to the pulling of the hollow valve shaft in the opening direction.

DESCRIPTION OF SYMBOLS 1 Lever type | mold liquid injection apparatus 2 Main body 2a Grasp part 2b Main cylinder 2c Holder 3 Nozzle part 3a Flow control core 3b Injection plate 3c Cap 3d Injection hole 4 Liquid supply path 5 Lever 5a Clevis part 6 On-off valve 6a Valve seat 6b Valve body 6c Hollow valve shaft 6d Spring 7 Rectifier valve 7a Rectifier plate 7b Valve body 7c Valve hole 7d Communication hole 7e Spring 8 Connection point adjusting mechanism 8a Lock nut 9 Retaining ring 10 Hood 11 Flow path 12 Spring retainer 13 Connection part 14 Connection shaft 15 Connection杆 16 Pin 17 Adjustment nut 18 Pull shaft 19 Recess 20 Pin 21 Multi-stage locking mechanism 22 Locking claw 23 Ratchet claw 23a Claw 23b Stopper 24 Elastic body 25 Locking claw case 26 Support shaft 27 Slider 28 Rib 29 Cam Surface 30 Return path 31 Guide 32 Anti-reverse part 33 Moving path 34 Stopper g Clearance

Claims (2)

A lever for operating the spray amount adjusting body incorporated in the main body (2) with a lever (5) attached to the main body to change the form of the jet water flow from the nozzle (3) at the tip of the main body according to the grip amount of the lever Type liquid ejecting apparatus,
The spray amount adjusting body is closed with a valve seat (6a), a valve body (6b) that contacts and separates from the valve seat, a hollow valve shaft (6c) that is pulled backward by lever operation, and the valve body (6b). An on-off valve (6) having a spring (6d) biased in the direction, and a rectifying valve (7) arranged downstream of the on-off valve,
The rectifying valve (7) includes a rectifying plate (7a) serving as a valve seat having a valve hole (7c) and a normally open communicating hole (7d) connected to a spiral groove downstream of the rectifying valve, and the rectifying plate. Valve body to be released (7b
And a spring (7e) for urging the valve body in the valve closing direction, and the valve hole (7c) has a hole edge at a position where the valve body (7b) is in contact with the rectifying plate (7a). The valve is processed into a shape that opens the part,
The valve body (7b) of the rectifying valve is connected to the tip of a slidable pull shaft (18) provided through the hollow valve shaft (6c), and the hollow valve shaft (6c) of the pull shaft (18) is connected. ) Is screwed into the rear end protruding backward, and the distance from the rear end of the hollow valve shaft (6c) to the adjustment nut (17) is adjusted by adjusting the screwing amount of the adjustment nut. Further, a linkage (15) for transmitting the movement of the lever (5) to the hollow valve shaft (6c) is provided, and the connection point of the linkage to the hollow valve shaft (6c) is a hollow valve. A lever-type liquid ejecting apparatus including a connection point adjusting mechanism (8) that changes in the axial direction of the shaft . The connection point adjusting mechanism (8) is provided on the outer periphery of the rear portion of the hollow valve shaft (6c), and two lock nuts (8a, 8a) are screwed into a male screw passing through the rear end wall of the linkage (15). The lever type liquid ejecting apparatus according to claim 1 , wherein the lever type liquid ejecting apparatus has a structure in which the rear end wall of the linkage (15) is sandwiched from the front and rear by the two lock nuts (8a, 8a).

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