JP5057381B2 - Pump pressing head - Google Patents

Description

  The present invention relates to a pump pressing head, and more particularly, to an improvement of a pump pressing head that is easy to run out of liquid after jetting liquid, is free from clogging in the head, and can be easily pushed down during jetting of liquid.

  As a pump pressing head, there is known a pumping head that is used by being fitted to the upper end of a stem protruding so as to be pushed in an upward biased state. These are configured so that the liquid in the container mounted by pushing is ejected from the ejection port via the stem. In a general pressing head, a vertical cylinder fitted to the stem and a base end on the upper part of the vertical cylinder are arranged. And a horizontal tube that communicates with the jet outlet at the tip. Further, there has been proposed an improvement of such a simple configuration, including a valve member urged by an elastic body so as to close the ejection port, and configured so that the ejection port is opened when pressed. . (For example, see Patent Document 1)

This pressing head is used by being fitted to the stem of the pump, and a mounting cylinder member provided with a sliding cylinder communicating with the inside of the stem, and a horizontal cylinder above the cylinder fitted to the mounting cylinder member. A main body provided, a valve member that closes the jet port in a forward biased state, defines a flow path from the communication port communicating with the inside of the cylinder to the jet port, and the rear side through the window hole in the rear wall of the horizontal cylinder The upper end is linked to the rear end of the valve member that protrudes toward the top, and the lower end is brought into contact with and locked to the top surface of the top plate. And a pivot member attached to the stem, and the body has a lower pressing force against the stem than that of the stem itself.
JP 2004-000834 A

  The above conventional pressing head can always stably eject the liquid, has good liquid drainage, has excellent sealing performance of the ejection port, can be easily pushed down, and can be used with any pump. Can be used, and the liquid can be ejected sufficiently stably even for long-term use. On the other hand, there is a possibility that it may come off the stem during the handling operation. In particular, in the case of a configuration including a stem that is biased upward by a coil spring disposed on the outer periphery, the mounting cylinder of the mounting cylinder member must be configured to be fitted and fixed in the stem. As the diameter becomes smaller, these members, which are generally formed of a synthetic resin, have a tendency to bend slightly. In addition, this type of pressing head has a spring receiver for locking the upper end of the coil spring fitted to the upper end of the outer periphery of the stem, and engages a protrusion protruding from the mounting cylinder member on the flange of the spring receiver. Thus, it serves as one end for preventing the mounting cylinder member from coming out, and this engagement tends to be weak against lateral force.

  On the other hand, there is a type in which the stem is biased upward by a coil spring interposed in the lower part of the stem, and the mounting cylinder of the mounting cylinder member is fitted to the outer periphery of the stem. In this case, the diameter of the mounting cylinder is also large. Since the undercut engagement is made between the outer surface of the stem and the inner surface of the mounting cylinder, there is almost no inconvenience that the pressing head comes off during the handling operation.

  There are two types of forms in which the conventional pressing head is detached from the stem. One is when the mounting cylinder member is detached from the stem, and the other is when the main body is detached from the mounting cylinder member. Therefore, in order to prevent the pressing head from being detached from the main body, the problem can be solved by increasing both the fitting strength and the locking strength. However, since the main body moves up and down with respect to the mounting cylinder member, as a means for preventing the main body from coming out of the mounting member, for example, a locking ridge protruding from the inner peripheral lower portion of the peripheral wall of the main body is applied to the lower peripheral edge of the mounting cylindrical member. Even if it is considered that the locking protrusion is forced to get over the peripheral portion of the mounting cylinder member, it is difficult to make the engagement strength particularly large.

  On the other hand, when fitting the mounting cylinder member to the stem, it is possible to obtain a large fitting strength in consideration of fitting and fixing the mounting cylinder member to the stem. However, if the main body is detached while the mounting cylinder member remains on the stem, it becomes extremely difficult for the consumer to restore the original state due to the complicated structure inside. Therefore, even if the pressing head may come off from the stem, in that case, it is preferable to remove it from the portion of the mounting cylinder member.

  Further, when the pressing head is detached, particularly when the mounting cylinder member is detached from the stem, the influence of the lateral force is large. For example, when removing the overcap that covers the pressing head and is detachably fitted. In some cases, the overcap is tilted off and a lateral force is applied, and the pressing head is released.

  The present invention has been made in view of the above points, and there is very little possibility of detachment from the stem during normal handling operations, and in addition, a pump that can exhibit the above-described unique effects can be obtained. Propose pressing head.

  In order to solve the above problems, the inventors of the present invention pay particular attention to the fact that when the overcap is removed, the main body is tilted by removing the overcap diagonally, and the push-down head may come off accordingly. Focusing on identifying the relationship between the inner diameter of the stem and the length of the mounting cylinder of the mounting cylinder member. At this time, the engagement between the main body and the mounting cylinder member is, for example, the engagement between the protrusion protruding from the peripheral wall of the main body and the protrusion protruding from the outer periphery of the mounting cylinder member, or the protrusion protruding from the peripheral wall of the main body. And a general engagement state of engagement with the outer peripheral lower surface of the mounting cylinder member. In any of these cases, the protrusion width of the protrusion must be within a certain range because the protrusion of the main body must be forced over the protrusion of the mounting cylinder member or the outer periphery of the mounting cylinder member. For example, in the case of mutual protrusions, the protrusion width of the protrusion on the main body side is about 0.1 mm to 0.2 mm, and the protrusion width of the protrusion on the mounting cylinder member side is similarly 0.1 mm to When the object is about 0.2 mm and the ridge is locked to the lower surface of the guide cylinder, the gap between the guide cylinder and the peripheral wall of the main body is about 0.1 mm to 0.2 mm. A general engagement state of a kind of pressing head is adopted.

On the other hand, when the ratio of the stem diameter L ₁ and the length of the mounting cylinder L ₂ is selected and removed while tilting the overcap, if L ₂ / L ₁ is less than 2.2, it is mounted The cylinder member is easily detached from the stem, and when L ₂ / L ₁ exceeds 4.0, the attachment cylinder member is hardly detached, and the main body may be detached from the attachment cylinder member due to the overcap's exit angle or the like. It was.

The first means is configured as follows. That is, a pressing head that is mounted on a pump that is erected so as to be able to push in a stem 2 that is biased upward by a coil spring s ₁ disposed on the outer periphery, and that is mounted on the inner peripheral upper end of the stem 2. Is mounted from the bottom surface of the top plate 11 and a mounting cylinder member A in which a sliding cylinder 12 communicating with the inside of the stem 2 is erected above the top plate 11 and a cylinder fitted to the outer periphery of the sliding cylinder 12 so as to be slidable and descendable. 23. A main body B provided with a valve chamber R having a spout 30 opened at the tip and provided so as to be able to be pushed down with respect to the mounting cylinder member A, and a spout in a forward biased state in the valve chamber R The upper end is linked to the valve member D, which forms a flow path from the inside of the cylinder 23 to the outlet 30 and the rear end portion of the valve member D, and the lower end portion is contacted with the upper surface of the top plate 11. The valve member D is pulled backward when the main body B is pushed down against the mounting cylinder member A. And an eaves member E pivotally attached to the main body B so as to swing out. The pressing force of the main body against the stem 2 is smaller than the pressing resistance of the stem itself, the inner diameter of the stem 2 is L ₁ , and satisfies the _{2.2 ≦ L 2 / L 1 ≦} 4.0 when the L ₂ a of.

The second means is configured as follows. That is, in the first means, the pump is provided with a spring receiver 3 having a flange 5 extending outward from the upper end of the fitting cylinder 4 fitted to the upper end of the outer periphery of the stem 2, and the spring receiver 3, the upper end of the coil spring s ₁ is locked to the lower surface of the flange 5 to bias the stem 2 upward.

  The pressing head according to the present invention can more reliably prevent the inconvenience of being disengaged from the stem 2 during the handling operation, and can be easily restored even if such an inconvenience occurs. . Further, the following effects are exhibited in the same manner as the conventional pressing head of this type. The liquid breaks off after the liquid is ejected, and it is possible to prevent inadvertent liquid ejection at the time of ejection, there is no risk of clogging or solidification in the head, and the push-down is hard despite the ejection port being blocked. It can be easily pushed down and ejected without becoming. Moreover, since it can be used regardless of the form of the pump, etc., it is excellent in versatility and can be applied to many types of pumps. Further, since the valve member is opened and closed by the eaves member, it is excellent in durability and can always be operated stably over a long period of time.

The pump is provided with a spring receiver 3 having a flange 5 extending outward from the upper end of the fitting cylinder 4 fitted to the upper end of the outer periphery of the stem 2, and the coil spring s ₁ is provided on the lower surface of the flange 5 of the spring receiver 3. In the case where the upper end is locked and the stem 2 is biased upward, the force of the coil spring s ₁ is not applied in the pulling-out direction of the mounting cylinder member A. Can prevent inconvenience such as slackening due to the coil spring s ₁ , and in turn helps prevent the pressing head from coming out more reliably.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The pressing head 1 of the present invention is used by being fitted to the upper end of the pump stem 2. The form of the pump to be installed can be adopted as long as the liquid in the pump is ejected from the stem by pushing down the stem, for example, a pump having a general pump structure including a cylinder and a piston, Or an aerosol type thing etc. are employable. In the illustrated example, the stem 2 is always urged upward by a coil spring s ₁ interposed between a spring receiver 3 fitted to the upper end of the outer periphery and the upper surface of the pump. The spring receiver 3 is configured by extending a flange 5 outward from the upper end edge of the fitting cylinder 4 fitted to the outer peripheral upper end of the stem 2, and the upper end of the coil spring s ₁ is locked to the lower surface of the flange 5. Yes.

  The pressing head 1 according to the present invention includes a mounting cylinder member A, a main body B, a spout member C, a valve member D, and a flange member E.

  The mounting cylinder member A has a mounting cylinder 10 fitted to the inner peripheral upper end of the stem 2 suspended from the back surface of the top plate 11 and a sliding cylinder 12 communicating with the inside of the stem 2 is erected at the center of the top plate 11. ing. Further, a guide tube 13 is suspended downward from the peripheral edge of the top plate 11. In addition, a locking plate 14 is extended for the purpose of extending vertically on both sides of the top plate 11 and preventing the main body B from wobbling.

  The main body B is connected to the stem 2 via a mounting cylinder member A so as to be able to be pushed down. The main body B has a top-bottomed cylindrical shape with a top wall 21 extending from the upper edge of the peripheral wall 20, and the front part of the peripheral wall 20 A horizontal cylinder 22 having an opening at the front end is projected rearward, and a cylinder 23 is suspended from the lower surface of the horizontal cylinder 22. Further, a cylinder 23 is fitted to the sliding cylinder 12 so as to be able to slide down, and a peripheral wall 20 is vertically mounted on the outer periphery of the guide cylinder 13 so as to be movable up and down. In addition, an engagement protrusion 24 projecting from the lower end portion of the inner periphery of the peripheral wall 20 is engaged with the lower end of the guide tube 13 to prevent upward slipping. In the figure, reference numeral 25 denotes a metal cover.

  The horizontal cylinder 22 has spaces on both sides and in the rear for accommodating the upper portion of the flange member E and the locking plate 14, and a window hole is formed in the center of the rear wall 22a. A seal cylinder 26 is projected further forward, and a communication port 27 communicating with the inside of the cylinder 23 is provided at the lower part. Further, on both sides of the peripheral wall 20, a pair of engaging protrusions 28 that engage with the engaging grooves 15 on the outer surface of the locking plate 14 are provided vertically.

  The spout member C is fitted into the horizontal cylinder 22 to define a valve chamber R inside the horizontal cylinder 22. In addition, the rear part is fitted in a liquid-tight manner to the front part in the horizontal cylinder 22, and the front part is tapered so as to open the jet port 30 at the tip thereof. Further, an annular protrusion protruding from the outer surface is brought into contact with and locked to the front surface of the main body B, and a plurality of circumferential ribs 31 are protruded inside.

The valve member D fits the inner periphery of the seal cylinder 26 so that the outer periphery of the rear part is slidable, and defines a flow path from the communication port 27 to the outlet 30 by closing the outlet 30 in the forward biased state. ing. In the illustrated example, it has a horizontal bar shape, and the skirt-like portion 40 extends backward from the middle portion in the longitudinal direction of the outer periphery, and the outer peripheral edge of the reverse skirt-like portion 41 turned back from the rear edge of the skirt-like portion 40 The periphery is slidably fitted. Moreover, it is closed by pressing the front end and urged forward to spout 30 by the coil spring s ₂ which is interposed a branch portion of the wall 22a front and skirt portion 40 after the transverse tube 22. Further, the rear end is protruded from the window hole of the rear wall 22a, and an annular recess 42 for engaging the flange member is provided in the protruding portion. As a result, a liquid flow path from the inside of the cylinder 23 through the communication port 27 to the jet outlet 30 through the inside of the horizontal cylinder 22 is defined.

  The flange member E has an upper end linked to a rear end portion of the valve member D protruding rearward through a window hole of the horizontal cylinder rear wall 22a, and a lower end portion abutted and locked to the upper surface of the top plate 11, and The valve member D is pivotably pivoted so that the valve member D is pulled out rearward when the main body B is pushed down with respect to the mounting cylinder member A. The eaves member E extends a bifurcated inclined plate portion 51 that descends forward from a lower end portion of the vertical plate portion 50 whose upper end portion is linked to the rear end portion of the valve member D, and slides the lower end portion of each inclined plate portion 51. The top surface of the top plate 11 on both sides of the moving cylinder 12 is abutted and locked. In this embodiment, the collar member E and the valve member D are linked by fitting the annular recess 42 of the valve member D into the notch 52 provided at the center of the upper end of the vertical plate portion 50. Further, the pivot shafts 53 projecting on both sides of the refracting portion are rotatably fitted to a pair of vertically suspended bearings 60 at a predetermined interval from the rear surface of the lower surface of the mounting plate F fitted just below the horizontal cylinder 22. ing.

The valve member D urged forward by the coil spring s ₂ always urges the linked portion of the upper part of the vertical plate portion 50 forward, and the top plate 11 of the mounting cylinder member A is inclined by pushing down the main body B. by rotating the lever member E pushes up the unit 51, are configured as pull out the valve member D rearwardly against the forward biasing force of the coil spring s _2. In the figure, G indicates an overcap.

  In the present invention, in such a pressing head, the pressing force of the main body B against the stem 2 is configured to be smaller than the pressing force of the stem itself. For this configuration, basically, if the elastic force of the elastic material for urging the valve member D forward is selected smaller than the elastic material for urging the stem of the pump to be mounted upward, In addition, these may be selected in consideration of the frictional force between the sliding cylinder and the cylinder, the frictional force when the saddle member swings, and the like.

Further, in the present invention, when the inner diameter of the stem 2 is L ₁ and the length of the mounting cylinder 10 is L ₂ , the relationship between the two is specified such that 2.2 ≦ L ₂ / L ₁ ≦ 4.0. . This more reliably prevents the pressing head 1 from coming out of the stem 2. When the ratio is less than 2.2, the mounting cylinder member A is easily detached from the stem 2. On the other hand, if the ratio exceeds 4.0, the main body B is easily detached from the mounting cylinder member A when the pressing head 1 is removed. It should be noted that the engagement strength between the main body B and the mounting cylinder member A is the relationship between the ridge used in the conventional pressing head of this type and the ridge configured to move up and down over the ridge. Or a case where a conventional engagement form such as engagement with a ridge configured to move up and down by forcibly moving over the downward step and the downward step is used.

When the detachment test of the pressing head 1 in the example of FIG. 1 was performed, the following results were obtained. As a test method, using a push-pull gauge, the pump equipped with the pressing head 1 is laid down and fixed, the side of the pressing head 1 is pressed from above at a speed of 100 mm / min, and the pressing force when the pressing head 1 is released is measured. It was measured. The measurement was performed 4 times, and the results are shown below. At this time, L ₁ = 4.4 mm and L ₂ = 12.5 mm of the pressing head, and L ₂ / L ₁ = 2.84.

  The results were as follows: 1st time: 22.2N (Newton), 2nd time: 23.0N, 3rd time: 25.0N, 4th time: 22.2N, and an average value of 23.1N was obtained. In this case, all of the pressing heads 1 were detached from the mounting cylinder member A. At this time, the test of the vertical pull-out strength was performed at the same time, but the pressing head 1 was detached at an average value of 35.7 N.

  Prior to this, it was used as a year-round product, and there was almost no accident that the pressing head was detached, except that a coil spring was built under the stem and a mounting cylinder member was fitted to the outer surface of the stem of FIG. Similar tests were performed using a press head of approximately the same type as the example. The results were 1st: 23.6N, 2nd: 21.08N, 3rd: 22.72N, 4th: 23.4N, and an average value of 22.7N was obtained. Therefore, it can be seen that the value of 23.1N is a value that the pressing head does not come off during normal use.

For comparison, a similar test was performed using the same pressing head as in the example of FIG. 1 except that L ₁ = 4.4 mm, L ₂ = 7.5 mm, and L ₂ / L ₁ = 1.70. The results were as follows: 1st time: 9.62N, 2nd time: 10.15N, 3rd time: 9.21N, 4th time: 9.78N, and an average value of 9.69N was obtained. A similar test was performed using the same pressing head as in the example of FIG. 1 except that L ₁ = 4.4 mm, L ₂ = 9.5 mm, and L ₂ / L ₁ = 2.16. In this case, three tests were performed. The results were as follows: 1st time: 14.5N, 2nd time: 16.0N, 3rd time: 19.0N, and an average value of 16.5N was obtained.

In the pressing head 1 configured as described above, when the pressing head 1 is pushed down from the state of FIG. 1, since the pressing drag of the stem 2 itself is larger than the pressing drag on the stem 2 of the main body B, the first stem 2 does not drop, The main body B descends with respect to the mounting cylinder member A. At this time, the lower end portion of the flange member E is pushed up to the upper surface of the top plate 11 of the mounting cylinder member A and pivots about the pivot shaft 53, and the upper end portion pivots rearward so that the valve member D is coiled. _The nozzle 30 is moved backward against the resilience of No. ₂ , and the spout 30 is opened. Next, the stem 2 descends, and as the stem descends, the liquid in the pump passes from the stem 2 through the cylinder 23 and is ejected from the communication port 27 to the outside through the flow outlet 30 through the flow path.

Next, when the pressing of the pressing head 1 is released, the head is raised by the upward biasing force of the stem first. At this time, for example, the stem is raised before the hand pressing the upper surface of the pressing head 1 is released, and the ejection port 30 is kept open. Therefore, at this time, the inside of the horizontal cylinder 22 is in a negative pressure state. Next, there is room for releasing the hand, and the valve member D moves forward by the elastic force of the coil spring s ₂ to close the ejection port 30, and accordingly, the main body B is attached to the mounting cylinder member A by the flange member E. Push up to return to the original state.

  In addition, each said member is mainly formed with a synthetic resin unless there is particular notice, and can be formed using a metal, an elastomer, etc. together as needed.

It is a longitudinal cross-sectional view of a pressing head. Example 1 It is a half sectional view of a pressing head. Example 1 It is a cross-sectional view of a stem portion. Example 1

Explanation of symbols

1 ... Pressing head A ... Installation cylinder member
10 ... Installation cylinder, 11 ... Top plate, 12 ... Sliding cylinder, 13 ... Guide cylinder, 14 ... Locking plate, 15 ... Engaging groove B ... Main body
20 ... peripheral wall, 21 ... top wall, 22 ... horizontal tube, 22a ... rear wall, 23 ... cylinder, 24 ... engaging ridge,
25 ... Cover, 26 ... Seal tube, 27 ... Communication port, 28 ... Engagement ridge, R ... Valve chamber C ... Outlet member
30 ... Jet, 31 ... Rib D ... Valve member
40 ... Skirt-shaped part, 41 ... Reverse skirt-shaped part, 42 ... Ring-shaped recess, s ₂ ... Coil spring E ... Scissors member
50 ... Vertical plate, 51 ... Inclined plate, 52 ... Notch, 53 ... Pivoting shaft F ... Mounting plate
60 ... bearing G ... overcap 2 ... stem, 3 ... spring receiving, 4 ... fitting tube, 5 ... flange, s ₁ ... coil spring

Claims (2)

A pressing head that is mounted on a pump that is erected so as to be able to push in a stem 2 that is biased upward by a coil spring s ₁ disposed on the outer periphery, and that has a mounting plate 10 that is fitted to the upper end of the inner periphery of the stem 2 11 Mounted from the bottom surface and mounted cylinder member A in which a sliding cylinder 12 communicating with the inside of the stem 2 is erected above the top plate 11 and above the cylinder 23 fitted to the outer periphery of the sliding cylinder 12 so as to be slidable and descendable And a main body B provided with a valve chamber R having a spout 30 opened at the tip thereof and capable of being pushed down with respect to the mounting cylinder member A, and the spout 30 in the valve chamber R in a forward-biased state. The upper end is linked to the valve member D, which is closed and defines a flow path from the inside of the cylinder 23 to the jet port 30, and the rear end of the valve member D, and the lower end is brought into contact with the upper surface of the top plate 11 The valve member D is pulled out rearward when the main body B is pressed down against the mounting cylinder member A. And an eaves member E pivotally attached to the main body B, the pressing force of the main body against the stem 2 is smaller than the pressing force of the stem itself, the inner diameter of the stem 2 is L ₁ , and the length of the mounting cylinder 10 A pump pressing head characterized by satisfying 2.2 ≦ L ₂ / L ₁ ≦ 4.0 when L ₂ is L ₂ . The pump is provided with a spring receiver 3 having a flange 5 extending outward from the upper end of the fitting cylinder 4 fitted to the upper end of the outer periphery of the stem 2, and the coil spring s ₁ is provided on the lower surface of the flange 5 of the spring receiver 3. 2. The pump pressing head according to claim 1, wherein the upper end is locked and the stem 2 is biased upward.