JP2002166204A - Depression head of vertical pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to remove the drawback that a depression head for use in a vertical pump equipped with a pestle for automatic opening and closing of a nozzle becomes uneasy and unfeasible in depression movement. SOLUTION: A depression head 7 is formed with a base cylinder member 11 fitted to the top end of a stem 5, a cover cylinder 21 fitted to the base cylinder member 11 in a manner vertically movable over a certain stroke and upward reboundable, and a sliding pestle 41 housed in a forward reboundable manner inside a second small cylinder 24 formed in the upper portion, exclusive of the upper rear portion, of the cover cylinder 21; the volume change in a first space 32, constituted by a first small cylinder 31 formed by the upper portion of the base cylinder member 11 and a foot cylinder 28 which is hung from the bottom surface of the second small cylinder 24 down into the interior of the first small cylinder 31 and the lower end of which makes a cylindrical piston 27, is made to be larger than the volume change in a second space 45 extending in front of a piston 42 formed by a portion of a sliding pestle in the second small cylinder 24; the stem 5 and the second space 45 are communicatively connected through the first space 32, and a discharge valve is constituted by the front end of the sliding pestle and a nozzle hole 25 in the front wall of the second small cylinder 24; and a movement turning mechanism is provided which makes the sliding pestle retreat when the cover cylinder 21 comes down.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressing head of a vertical pump.

[0002]

2. Description of the Related Art For example, as disclosed in Japanese Patent Application Laid-Open No. 9-155254,
A small cylinder is formed in the upper part of the press-down head of the vertical pump, a nozzle hole is formed in the front wall of the small cylinder, and a piston having a front end as a valve body is biased forward and fitted into the small cylinder. When the push-down head is lowered by connecting the inside of the operating member stem that rises from the inside of the large cylinder of the vertical pump to the inside of the small cylinder and dropping the engaging plate with the cam from the rear of the piston, Causes the valve body to open the nozzle hole by retracting the piston, and then the high-pressure liquid in the large cylinder passes through the stem of the operating member, and also squirts from the nozzle hole through the small cylinder to push down the press-down head. It is known that when released, a push-down head as an upper end of an actuating member rises and a piston advances to close a nozzle hole.

[0003]

When the operating member is lifted after the liquid is ejected by the pressing of the operating member, the conventional pressing head moves the liquid into the large cylinder, the stem, and the small cylinder of the pressing head of the vertical pump. Therefore, there is a drawback that a force is required when the press-down head is pressed down again, and it is difficult to press down.

The present invention is provided so that the pressing can be easily performed.

[0005]

As a first means, a press-down head 7 fitted to the upper end of an operating member stem 5 which is urged upward from the inside of a large cylinder of a vertical pump to be able to rise instantaneously is provided. A base cylinder member 11 having a lower half cylindrical portion fitted to the outer surface of the upper end portion of the stem 5 and an outward flange 13 attached to the cylindrical portion 12; Are fitted so as to be able to descend and resiliently recover against the biasing, and are fitted to the covering cylinder 21 whose upper part is a second small cylinder 24 by being biased forward into the second small cylinder 24. With the sliding punch 41 made, the urging force of the operating member is formed stronger than the urging force of the closed cylinder, and the upper part of the cylindrical portion 12,
One of the cylindrical portion fitted to the upper portion and hanging down from the lower surface of the second small cylinder 24 is formed on the first small cylinder 31, and the other is formed on the leg tube 28 having the cylindrical piston 27 at the tip end.
The rear part of the sliding punch 41 located in the second small cylinder 24 is formed in the piston 42, and the second space 45 formed in the second small cylinder 24 in front of the piston and the stem 5 1
A front end of a sliding punch 41 that is in communication with the inside of the small cylinder and the inside of the leg cylinder 28 through a first space 32 and that is in contact with the inner surface of the nozzle hole 25 formed in the second small cylinder front wall 24b and the inner surface. The discharge valve 43 is formed by the first portion 32 and the volume change amount of the first space 32 is made larger than the volume change amount of the second space 45.
When the cover cylinder 21 descends, a movement changing mechanism for retracting the sliding punch 41 against the bias is provided.

[0006] As a second means, the above-mentioned first means is provided, and the motion diverting mechanism is provided with an outwardly directed flange of the base cylinder member.
The upper surface of the engaging plate 15 raised from the rear of the rear part 13 is defined as an inclined surface 16 inclined downward and rearward, and a part of the front surface of the large outer diameter portion 46 attached to the rear end of the sliding punch 41 is attached to the upper part of the inclined surface. They were formed together.

As a third means, there is provided the above-mentioned second means, and the front surface of the large outer diameter portion 46 is provided with a rear large diameter tapered surface 47.
And

As a fourth means, the above-mentioned first means is provided and the movement diverting mechanism is provided with a base member outwardly facing flange.
The upper portion of the elastic engagement plate 15 raised from the rear of the fork 13 is bifurcated to form a sliding punch 41 between the left and right leg plates 17a, 17a forming the bifurcation.
Large outside diameter part inserted through the rear part and attached to the rear end of the sliding punch
The front surface of the left and right leg plates is engaged with the front surfaces of the left and right leg plates. Was formed by engagement.

As a fifth means, the first means is provided, and the upper end of the engaging plate 15 rising from the rear of the outwardly directed flange 13 of the base member is punched in a portion of the sliding punch 41 behind the piston 42. Into the lower end of the rear end of the vertical hole 48
At least one of the upper surface of the engaging plate and the rear surface of the vertical hole 48 is provided with inclined surfaces 16 and 49 extending downward and rearward, and the upper portion of the engaging plate 15 enters the vertical hole 48 when the covering cylinder 21 is lowered. If possible, the above-mentioned interlocking turning mechanism is formed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment shown in FIGS. 1 to 3 will be described. Reference numeral 1 denotes substantially the whole vertical pump. The pump droops a large cylinder 3 drooping into the container body from a mounting cylinder 2 screwed to the mouth and neck of the container body and the like,
The operating member 4 is erected by being urged upward from inside the large cylinder. The operating member raises a stem 5 from a cylindrical piston fitted into a large cylinder, and fits a pressing head 7 having a nozzle hole at the upper end of the stem. A suction valve is provided at the bottom of the cylinder, a suction pipe is suspended from the lower end of the cylinder in communication with the suction valve hole, and a first discharge valve 6 is provided in the lower 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 up and down movement of the operating member via the pressing head, and the liquid in the cylinder is ejected from the nozzle hole through the inside of the operating member.

In the present invention, the press-down head 7 is formed by a base cylinder member, a wrapping cylinder, and a sliding punch.

The base cylinder member 11 has a cylindrical portion
Fit the lower half of the 12
13 is attached. An inward flange 14 is provided on the inner surface of the intermediate portion of the cylindrical portion.

The covering cylinder 21 has a peripheral wall hanging down from the outer periphery of the top plate 22.
23 is fitted to the outer surface of the outward flange 13 and the inside of the upper part except the rear part is a second small cylinder 24 whose front and rear surfaces are closed. As shown in the figure, the second cylinder may be formed of a cylinder 24a having a rear surface closed and a front opening, and a nozzle cylinder 24d which projects into the front part of the cylinder from the outer periphery of a front wall 24b with a fitting cylinder 24c projecting rearward. The rear wall 24e has a through hole 24f at the center, and the front wall has a small diameter tapered front portion and a nozzle hole 25 is formed at the center thereof.

From the lower surface of the second small cylinder 24, in the illustrated example, the upper half of the cylindrical portion 12 of the base cylindrical member 11, A leg cylinder 28 having a cylindrical piston 27 at its lower end is hung down, and a middle diameter cylinder 29 is hung around the upper half of the cylinder.

A through-hole 30 is formed in the bottom of the second cylinder surrounded by the leg cylinder to communicate the interior of the leg cylinder 28 with the interior of the second cylinder.
The upper half of the cylindrical portion 12 forms a first small cylinder 31,
A cylindrical piston 27 is provided so as to move up and down in the first small cylinder, and the inside thereof is defined as a first space 32. On the contrary, the first cylinder is a leg cylinder with a cylindrical piston, the leg cylinder 28 shown 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 urged upward by a coil spring 33.

The sliding punch 41 is a through hole formed in the rear wall 24e of the second cylinder.
The rear part is penetrated through 24f and is laterally provided inside the upper part of the covering cylinder 21. A part of the intermediate part is used as a piston 42 so as to be slidable in the front and rear directions in the second cylinder. The front end of the sliding punch is tapered with a small diameter at the front to seal the inner surface of the nozzle hole 25 at the front end, and a discharge valve 43 is formed by the inner surface of the nozzle hole and the front end of the sliding punch. A coil spring 44 is also interposed between the piston 42 and the rear wall 24e to urge the sliding punch 41 forward. The space inside the second cylinder in front of the piston is referred to as a second space 45. The rear end of the sliding punch has a large outer diameter portion 46, and the front surface of the large outer diameter portion has a front small diameter tapered surface 47 as shown in FIG.

The upper portions of the engagement plates 15, 15 raised from the rear of the outwardly directed flange 13 of the base cylinder member are engaged with the tapered surface. The upper end of each of these engagement plates has a downwardly inclined surface.
The sliding punch portion immediately before the large outer diameter portion is located between the upper end portions of the engaging plates, and the upper portion of the inclined surface is engaged with the front surface of the front portion of the tapered surface.

Note that the first space 32 surrounded by the first small cylinder 31 and the leg cylinder 28 has a volume change caused by the downward movement of the leg cylinder. It should be larger than the amount of change. Further, the urging force for pushing up the operating member is set to be larger than the urging force for pushing up the covering cylinder 21.

In the above configuration, when the pressing head 7 is pressed down by 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 sliding punch is As shown in FIG. 2, the large outer diameter portion 46 moves downward and backward along the inclined surface 16 above the engagement plate, and the discharge valve 43 is opened by the sliding punch retreating. Subsequently, by pushing down the push-down head 7, the entire operation member is lowered,
Due to the lowering, the inside of the large cylinder 3 is pressurized and passes through the stem 5, the first small cylinder 31, the leg cylinder 28, and the second small cylinder 24 and is ejected from the nozzle hole 25.

Subsequently, when the pressing head is released, the operating member rises immediately before the finger is removed from the pressing head because the operating member suddenly rises, and the stem 5 and the base cylinder member reach the upper limit. Later, the finger can be released from above the pressing head, and the covering cylinder 21 further rises, and at the same time, the sliding punch 41 advances to close the discharge valve 43. Since the volume change of the first space 32 is larger than the volume change of the second space,
The first space enlargement amount by the rise of the leg cylinder 28 becomes larger than the second space narrowing amount by the advancement of the sliding punch 41, and a part of the liquid in the second space enters the first space before the discharge valve is closed. As a result, the outside air corresponding to the difference between the two volume changes is sucked into the second space through the nozzle hole 25 due to the negative pressure. The liquid remaining on the inner surface of the nozzle hole during the suction of the outside air is sucked into the second small cylinder.

At the time of the next press down of the press-down head, the appropriate amount of air is contained in the second cylinder as described above. By being compressed, it is easy to push down the covering cylinder 21 by lowering the covering cylinder with respect to the base cylinder member.

FIGS. 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 will be omitted. Only the different parts will be described. Raise an appropriate number of elastic plates 17 from the flange 13,
When the upper end of the elastic plate is brought into contact with the lower part of the slope of the inclined plate 18 attached to the inner surface of the covering cylinder 21 and the covering cylinder 21 is pushed down, the upper end of the elastic plate slides upward as shown in FIG. Then, the elastic plate is elastically deformed, and the cover cylinder 21 is pushed up by the elastic restoration when the pushing down is released.

The engaging plate 15 also serves as the elastic plate 17 and has an upper portion formed in a forked portion, and left and right leg plates 17a, 17a,
The rear part of the sliding punch 41 is inserted between 17a, and the upper end of the left and right leg plates is engaged with the lower part of the upper and lower inclined surface 19 formed on the lower surface of the covering cylinder top plate. The rear end of the sliding punch is a flat large-diameter part 46
The left and right leg plates 17a, 17
a rear surface is engaged. 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 front and rear portions of the large outer diameter portion 46 attached to the rear end of the sliding punch. Is pushed backward, the discharge valve 43 opens.

FIGS. 6 and 7 show a third embodiment. In this embodiment, a vertical hole 48 is formed in the sliding punch portion behind the piston 42, and the rear surface of the vertical hole is a downwardly inclined surface 49. The upper surface of the engagement plate 15 is formed as a downwardly inclined surface 16 and the upper end of the engagement plate 15 is formed in a vertical hole rearward of the rear wall 24e of the second small cylinder.
48 Inserted into the lower part.

When the pressing head 7 is pressed down from this state, the lower end of the rear surface of the vertical hole slides down along the inclined surface 16 of the engagement plate as shown in FIG. When the pressing head is released, the sliding punch 41 is urged forward, so that the lower end of the rear surface of the vertical hole slides on the slope of the engaging plate, whereby the covering cylinder 21 is raised. Note that either of the inclined surfaces 16, 49 may be either one, and if the inclined surface is provided only on the rear surface of the vertical hole 48, the sliding punch is retracted by raising the rear end of the upper end of the engagement plate along the inclined surface, and When the upper part of the inclined surface 49 is pressed against the rear end of the upper end of the engagement plate and slides, the covering cylinder 21 moves up. In addition, wrapping cylinder 21
May be used together with the coil spring and the elastic plate of the first or second embodiment.

[0026]

According to the present invention, since the second small cylinder 24 contains some air, the air is compressed. This makes it easier to push down the covering cylinder 21, and the covering cylinder 21 is
After that, the entire operation member 4 is pushed down, so that it is easy to push down.

According to the second aspect, the sliding punch 41 can easily be retracted against the bias.

According to the third aspect, the engagement plates 15, 1
5 as a pair of left and right inclined surfaces provided on the upper surface of both engagement plates
The upper portions can be engaged with the left and right sides of the tapered surface 47, so that the inclined surface and the large-diameter portion front surface can be reliably and easily engaged.

According to the fourth or fifth aspect, the motion diverting mechanism can be easily and reliably performed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a pressing head according to the present invention, which is mounted on a vertical pump.

FIG. 2 is a cross-sectional view showing the pressing head in FIG. 1 in a state in which a wrapping cylinder is pressed down with respect to a base cylinder member.

FIG. 3 is a perspective view of a main part of FIG. 1;

FIG. 4 is a cross-sectional view showing a press-down head according to a second embodiment fitted to a vertical pump.

FIG. 5 is a cross-sectional view showing the push-down head by pushing down the covering cylinder with respect to the base cylinder member.

FIG. 6 is a cross-sectional view showing a press-down head according to a third embodiment fitted to a vertical pump.

FIG. 7 is a cross-sectional view showing the pressing head shown in FIG. 6 when the covering cylinder is pressed down with respect to the base cylinder member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Vertical pump 7 ... Push-down head 11 ... Base cylinder member 21 ... Backing cylinder 41 ... Sliding punch

Continuation of the front page F term (reference) 3E084 AA04 AA12 AB01 BA02 CA01 DA01 DB12 FA09 FB01 GA04 GB04 KA01 KB01 LC01 LC06 LD22 LD25 LD26

Claims (5)

[Claims] 1. A press-down head 7 fitted to the upper end of an operating member stem 5 which is urged upward from the inside of a large cylinder of a vertical pump and rises so as to be able to rise instantaneously, is moved to the outer surface of the upper end of the stem 5. The base cylinder member 11 in which the lower half cylindrical portion is fitted and the outward flange 13 is attached to the cylindrical portion 12, and the peripheral wall 23 hanging down from the outer periphery of the top plate 22 to the outer surface of the outward flange, descends against the bias. And a cover cylinder 21 having a second small cylinder 24 inside.
And a sliding punch 41 fitted forward by being urged into the second small cylinder 24 to form the operating member urging force stronger than the overlying cylinder urging force. And one of a cylindrical portion fitted to the upper portion and hanging down from the lower surface of the second small cylinder 24 and the first small cylinder 31.
And the other, a leg cylinder having a cylindrical piston 27 at the tip
28, and a rear portion of the sliding punch 41 located in the second small cylinder 24 is formed in the piston 42 to form a second space 45 formed in the second small cylinder 24 in front of the piston and a stem. 5 is communicated through a first space 32 formed by the inside of the first small cylinder and the inside of the leg cylinder 28, and is pressed against the inside of the nozzle hole 25 formed in the front wall 24b of the second small cylinder and the inside. A discharge valve 43 is formed with the front end of the sliding punch 41 and the first space 32 is larger than the volume change amount of the second space 45.
A large amount of change in the volume of the base cylinder member 11, and furthermore, when the covering cylinder 21 is lowered with respect to the base cylinder member 11, a movement changing mechanism for retracting the sliding punch 41 against the bias is provided. Vertical pump depressing head. 2. The above-mentioned motion diverting mechanism is slid to the upper part of the inclined surface with the upper surface of the engaging plate 15 raised from the rear part of the outward flange 13 of the base cylindrical member as an inclined surface 16 inclined downward and rearward. 2. The vertical pump press-down head according to claim 1, wherein a part of a front surface of a large outer diameter portion provided at a rear end of the punch is engaged with the punch. 3. The press-down head of a vertical pump according to claim 2, wherein a front surface of said large outer diameter portion is a tapered surface having a rear large diameter. 4. The movement deflecting mechanism is formed by sliding an upper portion of an elastic engagement plate 15 rising from a rear portion of a base member outward flange 13 into two forks and sliding between left and right leg plates 17a, 17a forming the forked portions. The rear part of the moving punch 41 is inserted, and the front surface of the large outer diameter part 46 attached to the rear end of the sliding punch is engaged with the front surfaces of the left and right leg plates. Slope
2. The vertical pump push-down head according to claim 1, wherein the lower end of the leg plate is engaged with the upper end of each of the two leg plates. 5. An upper end portion of the engaging plate 15 raised from a rear portion of the base member outward flange 13 is inserted into a lower portion of a rear end of a vertical hole 48 formed in a portion of the sliding punch 41 behind the piston 42. At least one of the upper surface of the engaging plate and the rear surface of the vertical hole 48 is provided with inclined surfaces 16, 49 downward and rearward, and the upper portion of the engaging plate 15 is further provided with a vertical hole when the covering cylinder 21 is lowered. The vertical pump press-down head according to claim 1, wherein the interlocking diverting mechanism is formed so as to be able to enter the inside of the pump.