JP3814753B2 - Vertical pump pressing head - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pressing head of a vertical pump.
[0002]
[Prior art]
For example, as disclosed in Japanese Patent Application Laid-Open No. 9-155254, a small cylinder is formed in the upper portion of a vertical pump pressing head, a nozzle hole is formed in the front wall of the small cylinder, and a front end portion is formed in the small cylinder. The piston as the valve body is urged forward and fitted, and the inside of the operating member stem rising from the large cylinder of the vertical pump communicates with the inside of the small cylinder, and the engagement plate with the cam is suspended from the rear of the piston. When the push-down head is lowered, the cam causes the piston to move backward to open the nozzle hole, and then the high-pressure liquid in the large cylinder passes through the stem of the actuating member and the small cylinder. It is known that when the ejection head is released through the nozzle hole and the depression head is released, the depression head as the upper end of the operating member rises and the piston advances to close the nozzle hole. .
[0003]
[Problems to be solved by the invention]
The conventional pressing head sucks liquid into the large cylinder, stem, and small cylinder of the pressing head when the operating member is lifted after the liquid is ejected by pressing the operating member. When the lowering head is pushed down, a force is required, and there is a drawback that it is difficult to push down.
[0004]
The present invention is provided so that it can be pushed down easily.
[0005]
[Means for Solving the Problems]
As a first means, a push-down head 7 fitted to the upper end portion of the operating member stem 5 which is urged upward from the large cylinder of the vertical pump and stands up so that it can be instantaneously raised,
A base cylinder member 11 having a lower half cylinder portion fitted to the outer surface of the upper end portion of the stem 5 and an outward flange 13 attached to the cylinder portion 12;
A covering cylinder 21 having a peripheral wall 23 hanging from the outer periphery of the top plate 22 fitted to the outer surface of the outward flange so as to be able to descend and be elastically restored against urging, and having a second small cylinder 24 in the upper part;
With the sliding rod 41 urged forward and fitted into the second small cylinder 24, the actuating member urging force is made stronger than the covering cylinder urging force,
One of the upper portion of the cylindrical portion 12 and the cylindrical portion that is fitted to the upper portion and hangs down from the lower surface of the second small cylinder 24 has a first small cylinder 31 and the other has a cylindrical piston 27 at the tip. In the second space 45 formed in the leg cylinder 28, the rear portion of the sliding rod 41 located in the second small cylinder 24 is formed in the piston 42, and the inside of the second small cylinder 24 in front of the piston is formed. And the stem 5 communicate with each other through a first space 32 formed by the first small cylinder and the leg tube 28,
Further, a discharge valve 43 is formed by the inner surface of the nozzle hole 25 formed in the second small cylinder front wall 24b and the front end portion of the sliding rod 41 pressed against the inner surface, and more than the volume change amount of the second space 45. The volume change of the first space 32 is large,
Further, when the covering cylinder 21 descends with respect to the base cylinder member 11, a motion direction changing mechanism is provided to retreat the sliding rod 41 against the bias.
[0006]
As a second means, the upper surface of the engaging plate 15 having the first means and the motion direction changing mechanism is raised from the rear portion of the base cylinder member outward flange 13 as an inclined surface 16 obliquely rearward and rearward. A part of the front surface of the large outer diameter portion 46 attached to the rear end of the sliding rod 41 is engaged with the upper portion of the inclined surface.
[0007]
As a third means, the second means is provided, and the front surface of the large outer diameter portion 46 is a rear large diameter tapered surface 47.
[0008]
As a fourth means, the first means is provided and the motion turning mechanism is
The upper part of the elastic engagement plate 15 erected from the rear portion of the base cylinder member outward flange 13 is formed in a bifurcated manner, the rear portion of the sliding rod 41 is inserted between the left and right leg plates 17a, 17a forming the bifurcated portion, and the sliding前面 Engage the front of the large outer diameter part 46 attached to the rear end with the left and right leg plate front,
Further, the upper and rear inclined surfaces 19 are formed on the lower surface of the covering cylinder top plate portion above the engaging plate, and the upper ends of the leg plates 17a and 17a are engaged with the lower portion of the inclined surface.
[0009]
As a fifth means, a vertical pipe having the first means and having an upper end portion of the engagement plate 15 erected from the rear portion of the base member outward flange 13 in the rear portion of the piston 42 of the sliding rod 41 is provided. It is inserted into the lower part of the rear end of the hole 48, and at least one of the upper surface of the engagement plate or the rear surface of the vertical hole 48 is provided with inclined surfaces 16 and 49 downward and rearward, and the upper part of the engagement plate 15 is covered. The interlocking turning mechanism is formed so that it can enter the vertical hole 48 when the tube 21 is lowered.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
First, the first embodiment shown in FIGS. 1 to 3 will be described. Reference numeral 1 denotes almost the entire vertical pump. The pump hangs down a large cylinder 3 that hangs down from the mounting cylinder 2 that is screwed into the container body neck and the like into the container body, and urges the urging member 4 upwardly from the inside of the large cylinder. The operating member erects a stem 5 from a cylindrical piston fitted into a large cylinder, and a push-down head 7 with a nozzle hole is fitted to the upper end of the stem. A suction valve is provided at the bottom of the cylinder so as to communicate with the suction valve hole, the suction pipe is suspended from the lower end of the cylinder, and the first discharge valve 6 is provided in the lower part or upper part of the stem 5 forming a part of the operating member. The liquid in the container is sucked into the large cylinder by the vertical movement of the operating member via the push-down head, and the liquid in the cylinder is ejected from the nozzle hole through the operating member.
[0011]
In the present invention, the pressing head 7 is formed of a base cylinder member, a cover cylinder, and a sliding rod.
[0012]
The base cylinder member 11 has the lower half of the cylinder part 12 fitted to the upper part of the stem 5, and an outward flange 13 is attached to an intermediate part of the cylinder part. An inward flange 14 is attached to the inner surface of the intermediate portion of the cylindrical portion.
[0013]
The covering cylinder 21 has a peripheral wall 23 hanging from the outer periphery of the top plate 22 fitted to the outer surface of the outward flange 13, and the inside of the upper part excluding the rear part serves as a second small cylinder 24 that closes the front surface and the rear surface. As shown in the figure, the second cylinder may be formed of a cylinder 24a having a closed front surface and a front opening, and a nozzle cylinder 24d projecting a fitting cylinder 24c rearward from the outer periphery of the front wall 24b into the front part of the cylinder. A rear hole 24f is formed at the center of the rear wall 24e, and the front wall is formed in a tapered shape having a small diameter at the front, and a nozzle hole 25 is formed at the center thereof.
[0014]
Fits into the upper half of the cylinder portion 12 of the base cylinder member 11 from the lower surface of the second small cylinder 24, in the illustrated example, from the lower surface of the cylinder 26 into which the cylinder is fitted. In combination, a leg cylinder 28 having a cylindrical piston 27 at the lower end is suspended, and a medium-diameter cylinder 29 is suspended around the upper half of the cylinder part.
[0015]
A through hole 30 is formed in the bottom of the second cylinder surrounded by the leg tube so that the inside of the leg tube 28 communicates with the second cylinder. The upper half of the cylindrical portion 12 forms a first small cylinder 31, and a cylindrical piston 27 is provided so as to move up and down in the first small cylinder. In other words, the first cylinder is a leg cylinder with a cylindrical piston, the illustrated leg cylinder 28 is formed in the first cylinder, and the leg cylinder is fitted into the first cylinder. One cylinder may be provided so as to move up and down together with the covering cylinder. The covering cylinder 21 is biased upward by a coil spring 33.
[0016]
The sliding rod 41 has a rear portion penetrating the through hole 24f of the rear wall 24e of the second cylinder and is laterally installed in the upper portion of the covering cylinder 21. A part of the intermediate portion serves as a piston 42 in the second cylinder. Is slidable in the front-rear direction. The front end portion of the sliding rod is tapered with a small diameter at the front portion, and the inner surface of the nozzle hole 25 is sealed at the front end, and the discharge valve 43 is formed by the inner surface of these nozzle holes and the front end portion of the sliding rod. A coil spring 44 is also interposed between the piston 42 and the rear wall 24e to urge the sliding rod 41 forward. A space in the second cylinder in front of the piston is defined as a second space 45. The rear end portion of the sliding rod is a large outer diameter portion 46, and the front surface of the large outer diameter portion is a tapered surface 47 having a small front diameter as shown in FIG.
[0017]
The upper portions of the engagement plates 15 and 15 raised from the rear portion of the base cylinder member outward flange 13 are engaged with the tapered surface. The upper end portions of these engagement plates are formed on the inclined surfaces 16 and 16 to the lower and rear sides, the sliding collar portion immediately before the large outer diameter portion is positioned between the upper end portions of both engagement plates, and the inclination The upper surface is engaged with the front surface of the front portion of the tapered surface.
[0018]
In the first space 32 surrounded by the first small cylinder 31 and the leg cylinder 28, the volume change amount caused by the lowering of the leg cylinder is larger than the volume change quantity caused by the backward movement of the sliding rod 41 in the second cylinder in front of the piston. Also keep it big. The urging force for pushing up the operating member is set larger than the urging force for pushing up the cover tube 21.
[0019]
In the above configuration, when the push-down head 7 is pushed down with a finger, the covering cylinder 21 is lowered with respect to the base cylinder member 11 against the bias of the coil spring 33, and at the same time, the lowering of the sliding rod is greatly reduced. As shown in FIG. 2, the large outer diameter portion 46 is lowered and retracted along the inclined surface 16 at the upper portion of the engagement plate as shown in FIG. 2, and the discharge valve 43 is opened. Subsequently, when the push-down head 7 is pushed down, the entire operating member is lowered, and the inside of the large cylinder 3 is pressurized by the lowering, and the stem 5, the first small cylinder 31, the leg tube 28, and the second small cylinder 24 are moved inside. It ejects from the nozzle hole 25 through.
[0020]
Subsequently, when the pressing head is released, the operating member suddenly rises so that the operating member rises before the finger is removed from the top of the pressing head, and the stem 5 and the base tube member are pressed down after reaching the upper limit. When the finger can be released from the top of the head, the covering cylinder 21 is further raised, and at the same time, the sliding rod 41 is advanced to close the discharge valve 43. Since the volume change amount of the first space 32 described above is larger than the volume change amount of the second space, the first space expansion by the rise of the leg tube 28 is larger than the second space reduction amount by the advancement of the sliding rod 41. The amount of liquid is increased, and a part of the liquid in the second space is drawn back into the first space prior to the closing of the discharge valve. The outside air corresponding to is sucked into the second space. During the outside air suction, the liquid remaining on the inner surface of the nozzle hole is sucked into the second small cylinder.
[0021]
When the pressing head is pushed down next time, an appropriate amount of air is contained in the second cylinder as described above, so that the air in the second cylinder is compressed when the covering cylinder 21 is lowered with respect to the base cylinder member 11. Thus, the covering cylinder 21 is lowered with respect to the base cylinder member, so that the covering cylinder 21 can be easily pushed down.
[0022]
4 and 5 show a second embodiment. The same parts as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted. When only different parts are described, the upward biasing of the cover cylinder 21 with respect to the base cylinder member 11 When an appropriate number of elastic plates 17 are erected from the flange 13, the upper end of the elastic plate is brought into contact with the lower surface of the inclined plate 18 provided on the inner surface of the covering cylinder 21, and the covering cylinder 21 is pushed down, FIG. As described above, the elastic plate is elastically deformed by sliding the upper end of the elastic plate upward on the slope, and the covering cylinder 21 is pushed up by the elastic restoration when the above-mentioned pressing is released.
[0023]
The engaging plate 15 also serves as the elastic plate 17 and has an upper portion formed in a bifurcated portion. The rear portion of the sliding rod 41 is inserted between the left and right leg plates 17a and 17a forming the bifurcated portion, and the upper ends of the left and right leg plates are covered. The top plate portion is engaged with the lower portion of the inclined surface 19 formed on the lower surface of the top plate. The rear end portion of the sliding rod is a flat large outer diameter portion 46, and the rear surfaces of the left and right leg plates 17a, 17a are engaged with the left and right sides of the front surface of the large outer diameter portion. Therefore, when the covering cylinder 21 is pushed down, the engagement plate 15 is elastically deformed rearward as shown in FIG. 5, and the elastic deformation causes the left and right portions of the front surface of the large outer diameter portion 46 attached to the rear end of the sliding rod. Is pushed backward to open the discharge valve 43.
[0024]
6 and 7 show a third embodiment. In this embodiment, a vertical hole 48 is formed in the sliding flange portion behind the piston 42, and the rear surface of the vertical hole is an inclined surface 49 downward and rearward. Further, the upper surface of the engaging plate 15 is inclined downwardly and rearwardly, and the upper end of the engaging plate is inserted into the lower portion of the vertical hole 48 behind the second small cylinder rear wall 24e.
[0025]
When the push-down head 7 is pushed down from this state, as shown in FIG. 7, the lower end portion of the rear surface of the vertical hole descends and slides along the inclined surface 16 of the engagement plate, so that the discharge valve 43 opens, and the push-down head Since the sliding rod 41 is urged forward, the covering cylinder 21 rises as the lower end of the rear surface of the vertical hole slides on the slope of the engagement plate. The inclined surfaces 16 and 49 may be either one. When the inclined surfaces 16 and 49 are provided only on the rear surface of the vertical hole 48, the sliding plate retreats when the upper end of the engaging plate rises along the inclined surface. The upper portion of the inclined surface 49 comes into pressure contact with the rear upper end of the engagement plate and slides, so that the covering cylinder 21 rises. Note that the upward biasing of the covering cylinder 21 may be performed in combination with the coil spring or the elastic plate of the first or second embodiment.
[0026]
【The invention's effect】
The present invention has the above-described configuration. Since the air is contained in the second small cylinder 24 somewhat as in the first aspect, the cover cylinder 21 is compressed by the air being compressed. It is easy to push down, and after the covering cylinder 21 is lowered with respect to the base cylinder member 11, the entire actuating member 4 is pushed down.
[0027]
By making it like Claim 2, it becomes easy to reverse the sliding rod 41 against an urging | biasing.
[0028]
According to the third aspect, the upper surfaces of the inclined surfaces 16 and 16 provided on the upper surfaces of the engaging plates 15 and 15 can be engaged with the left and right side portions of the tapered surface 47. Engagement between the inclined surface and the front surface of the large outer diameter portion can be performed reliably and easily.
[0029]
By making it like Claim 4 or 5, a motion direction change mechanism can be made easy and reliable.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a pressing head of the present invention shown in a state where it is mounted on a vertical pump.
FIG. 2 is a cross-sectional view showing the push-down head in a state in which the cover tube is pushed down with respect to the base tube member.
FIG. 3 is a perspective view of the main part of FIG. 1;
FIG. 4 is a sectional view showing a pressing head according to a second embodiment fitted to a vertical pump.
FIG. 4 is a cross-sectional view showing the pressing head when the covering cylinder is pressed down with respect to the base cylinder member.
FIG. 6 is a sectional view showing a pressing head according to a third embodiment fitted to a vertical pump.
FIG. 6 is a cross-sectional view showing the pressing head when the covering cylinder is pressed down with respect to the base cylinder member.
[Explanation of symbols]
1 ... Vertical pump 7 ... Pressing head
11… Base cylinder 21… Cover cylinder
41 ... Sliding rod

Claims (5)

A pressing head 7 fitted to the upper end portion of the operating member stem 5 that is urged upward from the large cylinder of the vertical pump and stands up so that it can be instantaneously raised,
A base cylinder member 11 in which a lower half cylinder part is fitted to the outer surface of the upper end part of the stem 5 and an outward flange 13 is attached to the cylinder part 12;
A covering cylinder 21 having a peripheral wall 23 hanging from the outer periphery of the top plate 22 fitted to the outer surface of the outward flange so as to be able to descend and be elastically restored against urging, and having a second small cylinder 24 in the upper part;
With the sliding rod 41 biased forward and fitted into the second small cylinder 24, the actuating member biasing force is made stronger than the cover cylinder biasing force,
One of the upper portion of the cylindrical portion 12 and the cylindrical portion that is fitted to the upper portion and hangs down from the lower surface of the second small cylinder 24 has a first small cylinder 31 and the other has a cylindrical piston 27 at the tip. In the second space 45 formed in the leg cylinder 28, the rear portion of the sliding rod 41 located in the second small cylinder 24 is formed in the piston 42, and the inside of the second small cylinder 24 in front of the piston is formed. And the stem 5 communicate with each other through a first space 32 formed by the first small cylinder and the leg tube 28,
Further, a discharge valve 43 is formed by the inner surface of the nozzle hole 25 formed in the second small cylinder front wall 24b and the front end portion of the sliding rod 41 pressed against the inner surface, and more than the volume change amount of the second space 45. The volume change of the first space 32 is large,
A vertical pump pressing head, further comprising a motion turning mechanism for moving the sliding rod 41 backward against the bias when the cover cylinder 21 descends with respect to the base cylinder member 11. The upper surface of the engagement plate 15 raised from the rear portion of the base cylinder member outward flange 13 is the upper surface of the inclined surface 16 and the rear surface of the sliding rod 41 at the rear end of the sliding rod 41. 2. A push-down head for a vertical pump according to claim 1, wherein a part of the front surface of the attached large outer diameter portion is engaged. The front surface of the large outer diameter portion 46 is a rear large diameter tapered surface 47,
3. A pressing head of a vertical pump according to claim 2, wherein The motion turning mechanism is
The upper part of the elastic engagement plate 15 erected from the rear portion of the base cylinder member outward flange 13 is formed in a bifurcated manner, the rear portion of the sliding rod 41 is inserted between the left and right leg plates 17a, 17a forming the bifurcated portion, and the sliding前面 Engage the front of the large outer diameter part 46 attached to the rear end with the left and right leg plate front,
Further, an inclined surface 19 is formed on the lower surface of the covering cylinder top plate part above the engaging plate, and the upper ends of the leg plates 17a, 17a are engaged with the lower portion of the inclined surface. The pressing head of the vertical pump according to claim 1. The upper end portion of the engaging plate 15 raised from the rear portion of the base cylinder member outward flange 13 is inserted into the lower portion of the rear end of the vertical hole 48 formed in the rear portion of the piston 42 of the sliding rod 41, or At least one of the upper surface of the engagement plate or the rear surface of the vertical hole 48 is provided with inclined surfaces 16 and 49 downward and rearward, and the upper portion of the engagement plate 15 can enter the vertical hole 48 when the cover cylinder 21 is lowered. The push-down head of the vertical pump according to claim 1, wherein the interlocking deflection mechanism is formed.

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