JP4954807B2 - Hand pump - Google Patents

Description

  The present invention relates to a hand pump used for supplying a liquid, and particularly to prevention of pinching between a piston rod and a sliding portion.

  Currently, hand pumps are used to pump water from household wells and to supply drinking water during disasters such as earthquakes.

  Such a hand pump is mainly provided with a piston for sucking up water inside a cylinder having one end as a suction side and the other end as a discharge side. The piston is reciprocated via a piston rod. A structure in which a link mechanism is assembled is used.

  As a hand pump having such a structure, there is a promotion-type hand pump having a discharge chamber provided on the discharge side of the cylinder and having a structure in which water is discharged while ensuring a predetermined pressure in the cylinder and the discharge chamber. . In this promotion-type hand pump, the end portion of the piston rod is penetrated outward from a penetration portion provided in a wall portion of the discharge chamber. The penetrating part and the piston rod are sealed with packing, and the inside of the discharge chamber is sealed. A link mechanism portion having an operation lever for reciprocating the piston is connected to the end portion of the penetrated piston rod.

  In such a hand pump, when the operation lever is operated, the piston rod reciprocates in the axial direction via the link mechanism, so that the piston also reciprocates inside the cylinder.

  By the reciprocating motion of the piston, water is sucked into the cylinder from a water source such as a well, and further fed into the discharge chamber while ensuring pressure, and water is supplied downstream from the discharge chamber.

  As such a hand pump, there is also known a pump that prevents water leakage from between the penetrating portion and the piston rod due to piston rod shaking (see, for example, Patent Document 1).

Further, in cold regions, when used in winter, water accumulated in the hand pump is frozen, so that the cylinder and the discharge chamber of the hand pump are prevented from being destroyed. A hand pump having a precipitation function is also known.
JP 2007-64105 A

  The hand pump as described above has the following problems. That is, a gap is formed between the piston rod and the penetrating portion of the discharge chamber so that the piston rod does not interfere with the penetrating portion when the piston rod reciprocates. Since the hand pump is used outdoors, there is a risk that dust or the like enters the gap and the sliding surface of the piston rod is damaged by the reciprocating motion of the piston rod. In particular, since the scratch in the axial direction has the same reciprocating direction and the direction of the scratch, water in the discharge chamber may leak from the scratch during the reciprocating motion (sliding).

  The connecting portion between the piston rod and the link mechanism portion has a receiving portion having a diameter larger than the diameter of the piston rod, and an object or a finger is interposed between the receiving portion and the peripheral portion of the discharge chamber through portion. There was also a risk of pinching them.

  In addition, there are some hand pumps having a precipitation function that can make precipitation by allowing the piston to settle down. In such a hand pump, when the water is pumped up, the piston is accidentally settled down, and the water accumulated in the cylinder and the discharge chamber is precipitated, and the discharge efficiency may be deteriorated.

  Accordingly, an object of the present invention is to provide a hand pump capable of supplying water, which can prevent pinching and prevent erroneous operation during pumping.

  In order to solve the above problems and achieve the object, the hand pump of the present invention is configured as follows.

A cylindrical cylinder having a suction side at the lower end opening and a discharge side at the upper end opening;
A discharge chamber provided on the discharge side of the cylinder and formed with a discharge chamber communicating with the inside of the cylinder, and an outer peripheral portion of the discharge chamber formed to be slidable back and forth on the inner peripheral surface of the cylinder. A piston to be divided, a piston rod that is supported by one end of the piston located in the cylinder, a piston rod that is inserted into and removed from the cylinder, and a fulcrum provided outside the cylinder or the discharge chamber. An operating lever formed to be swingable, and a link mechanism portion that connects one end of the operating lever and the other end of the piston rod, and converts the swinging motion of the operating lever into the reciprocating motion of the piston rod. And the link mechanism which is provided on the outer peripheral surface of the discharge chamber, inserts the outer peripheral surface of the piston rod, and is connected to the piston rod Part characterized in that it comprises a cylindrical ring member of which one end surface is formed at the contact can be an elastic body upon falling of.

  A cylindrical cylinder having a suction side at the lower end opening and a discharge side at the upper end opening, a discharge chamber provided on the discharge side of the cylinder and having a discharge chamber communicating with the inside of the cylinder, and an outer peripheral portion thereof Is formed on the inner circumferential surface of the cylinder so as to be slidable in a reciprocating manner, and the piston is liquid-tightly divided in the cylinder, and is supported by one end of the piston located in the cylinder, and is inserted into and removed from the cylinder. A connecting piston rod, an operating lever swingable around a fulcrum provided outside the cylinder or the discharge chamber, and one end of the operating lever and the other end of the piston rod A link mechanism for converting the swinging motion of the operating lever into the reciprocating motion of the piston rod, and an outer peripheral surface of the discharge chamber, The cylindrical first ring member formed of an elastic body and the end of the link mechanism connected to the piston rod are inserted into the piston rod and connected to the piston rod. A cylindrical second ring member formed of an elastic body so that the end surface of the first ring member and the opposite end surface of the first ring member can come into contact with each other when a part of the link mechanism portion is lowered. It is characterized by.

  According to the present invention, it is possible to provide a hand pump capable of supplying water, which can prevent pinching and prevent erroneous operation during pumping.

  Hereinafter, the hand pump 1 which concerns on the 1st Embodiment of this invention is demonstrated using FIGS.

  FIG. 1 is a perspective view showing an appearance of a hand pump 1 according to a first embodiment of the present invention, FIG. 2 is a partial cross-sectional view schematically showing an internal configuration of the hand pump 1, and FIG. FIG. 4 is a perspective view showing an example of use of the hand pump 1, and FIG. 5 is a partial cross-sectional view schematically showing an example of using the precipitation function of the hand pump 1. FIG. 6 is a perspective view showing a main configuration of the hand pump 1 when using the precipitation function. 1 and 5, E indicates a discharge chamber, and F indicates a suction chamber.

  As shown in FIGS. 1 to 4, the hand pump 1 includes a main body 10 that forms a discharge chamber E and a suction chamber F, a piston member 50 that is reciprocally movable inside the main body 10, and the piston member 50. Are connected to a piston rod 51, which will be described later, and a link mechanism portion 70 that reciprocates the piston member 50, and a ring member 80 that covers a part of the outer peripheral surface of the piston rod 51. The hand pump 1 has a precipitation function due to a first protrusion 30 and a second protrusion 27 described later.

  The main body 10 includes, for example, a cylindrical cylinder 11 provided at a right angle to the water surface by making the lower end portion 11a face the water surface, and a discharge chamber 12 connected to the upper end portion (upper end opening portion) 11b of the cylinder 11. It has. In addition, the cylinder 11 and the discharge chamber 12 which are the main body 10 are connected by the 1st flange part 13, and the discharge chamber E will be formed in those inside.

  The cylinder 11 has a cylindrical member 15 in which a piston 54, which will be described later, is slidable on the inner periphery thereof, and a bowl-shaped suction cover 17 connected to the lower end surface of the cylindrical member 15 via a second flange portion 16. A cover member (second projecting member) 18 provided between the cylindrical member 15 and the suction cover 17, a first valve chamber 19 formed in the suction cover 17, and a first valve chamber 19. A first check valve 20.

  The cylindrical member 15 is formed with a first flange 13a on the upper end side and a second flange 16a on the lower end side, and the inner peripheral surface of the cylindrical member 15 is circular with respect to the surface roughness and its axis. It is formed with high accuracy.

  The suction cover 17 is provided at the second flange 16b provided on the upper end side thereof, the annular groove portion 21 provided on the inner peripheral edge of the second flange 16b, and the lower end on the axis of the suction cover 17. A suction port (lower end opening) 22 and a screw portion 23 that connects to a hose provided in the suction port 22 and disposed in water, for example, are formed.

  The second flange portion 16a is formed by connecting the second flange 16a and the second flange 16b with a bolt 25 via a gasket 24 or the like.

  The cover member 18 is in the shape of a disk, and comes into contact with the lower surface of a second valve body 58, which will be described later, provided in a plurality of holes 26 provided in the disk to form a water flow path. A second protrusion 27, and is provided in the groove 21 of the second flange 16b.

  The first check valve 20 includes a first valve seat 28 provided on the upper surface of the suction port 22, a first valve body 29 whose lower surface abuts on the upper surface of the first valve seat 28, and a first valve body 29. The first protrusion 30 protrudes obliquely from the center of the first protrusion 30 and protrudes from the hole 26 of the cover member 18.

  The discharge chamber 12 includes a discharge port 31 to which the discharge unit 31 a is connected, a through portion 32 provided in the upper wall 12 a of the discharge chamber 12, a first flange 13 b provided at the lower end of the discharge chamber 12, and a discharge And a support portion 33 provided on the outer surface of the chamber 12.

  The first flange 13a and the first flange 13b are connected by a bolt 25 or the like via a gasket 24 or the like, so that the first flange portion 13 is formed.

  The through portion 32 includes a through hole 34 through which the piston rod 51 passes, a seal groove 36 in which the packing member 35 is accommodated, and a guide 37 that covers the upper portion of the packing member 35.

  The packing member 35 is formed in, for example, an annular shape having a reverse Y-shaped cross section, and has a lip portion at the lower end portion on the inner surface side thereof, and is formed so as to be elastically contactable with the sliding surface of the piston rod 51. . The lip portion is in sliding contact with the outer peripheral (sliding) surface of the piston rod 51, thereby sealing between the through hole 34 and the piston rod 51.

  The guide tool 37 has a through hole 38 in the shaft center portion, and is screwed into a screw portion 36 a provided in the upper portion of the seal groove 36, so that the movement of the packing member 35 in the shaft center direction can be restricted. The through hole 38 is formed to have a diameter having a predetermined gap when the piston rod 51 passes through the through hole 38. Further, a ring member 80 is disposed on the upper surface of the guide tool 37 and on the peripheral portion of the through hole 38.

  The piston member 50 includes a piston rod 51 extending from the discharge chamber E to the outside of the main body 10 through the through hole 34, the packing member 35, and the through hole 38, and a piston fixed to the lower end side of the piston rod 51. And a connecting portion 60 provided on the upper end side of the piston rod 51 and formed so as to be connectable to a link member 72 described later.

  The piston rod 51 has a cylindrical shape, and at least a portion of the outer peripheral surface that slides with the packing member 35 has a highly accurate surface roughness.

  The piston part 52 includes, for example, a piston yoke 53 connected to the lower end side of the piston rod 51, a piston 54 provided on the piston yoke 53 so as to be slidable on the inner peripheral surface of the cylinder 11, and the piston 54 as a piston. A piston presser 55 that is fixed to the yoke 53 is provided.

  The piston yoke 53 extends in, for example, four directions around the piston rod 51, and is provided in an arrangement having a space between the piston yokes 53. Thereby, the upper surface of the piston part 52 is located in the discharge chamber E.

  The piston 54 is formed of a resin such as rubber, for example, and is formed so as to be elastically deformable, and is formed so that the inside of the cylinder 11 can be divided by the piston 54.

  The piston retainer 55 fixes the piston 54 to the piston yoke 53 and has an opening 55 a at the center of the piston retainer 55. A second valve seat 56 is formed on the upper end surface of the opening 55a.

  A second valve chamber 57 is formed in the space between the piston yoke 53 and the piston retainer 55 on the center side of the piston 54. In the second valve chamber 57, a second check valve 59 including a second valve body 58 whose lower surface abuts on the second valve seat 56 is provided.

  The connecting portion 60 has a bearing portion 61 in the thickness direction, and is formed so that a connecting shaft 62 to be connected to a link member 72 described later can be inserted.

  The link mechanism unit 70 is connected to a lever member (operation lever) 71 that is rotatably supported around a support unit 33 provided on the outer side of the discharge chamber 12, and is connected to the lever member 71. Two link members 72 connected via a connecting shaft 62 so as to sandwich the portion 60 are provided.

  The lever member 71 is supported by a support shaft 73 inserted into the support portion 33 at the substantial center of the lever member 71. Further, an operating rod 75 is connected to an end portion of the lever member 71 facing the main body 10 side end portion around the support shaft 73 via an insertion-type fastening portion 74.

  The support shaft 73 is inserted into the support portion 33 in a direction orthogonal to the axial direction of the cylinder 11, and is formed so as to be rotatable along the vertical (axial center) direction of the entire lever member 71.

  The fastening portion 74 includes a cylindrical rod insertion portion 74a and a fastening bolt 74b that is screwed into and out of the rod insertion portion 74a. The end of the operation rod 75 is inserted into the rod insertion portion 74a and the fastening bolt 74b is screwed into the operation rod 75 so that the operation rod 75 can be fixed to the fastening portion 74.

  The ring member 80 is formed in a cylindrical shape having an inner diameter slightly larger than the outer diameter of the piston rod 51, and has a slit 81 provided at one location in the radial direction and the axial direction of the ring member 80. The ring member 80 is formed of an elastic member, for example, rubber such as synthetic rubber or natural rubber. In addition, you may form with other resin etc. instead of rubber | gum.

  The ring member 80 is formed so that the inner diameter portion can be opened by widening the slit 81 portions in the separating direction, and is detachably formed on the outer peripheral surface of the piston rod 51.

  In the hand pump 1 configured as described above, in an initial (standby) state in which the hand pump 1 is not used, the lower surface of the connecting portion 60 contacts the upper surface of the ring member 80 as shown in FIG. For this reason, in the initial state, the lever member 71 and the operating rod 75 are inclined about 5 °, for example, in a direction in which the operating rod 75 side is separated from the axis of the cylinder 11. That is, the piston 54 is moved slightly upward from the bottom position (bottom dead center).

Next, the operation in the case of pumping water from a water source such as a well using the hand pump 1 will be described.
First, the user rotates the operation rod 75 downward about the support shaft 73. When the operation rod 75 is rotated downward, the link mechanism moves upward. At this time, as shown in FIG. 4, the piston rod 51 is clamped at two points of the outer diameter of the piston 54, the inner diameter of the cylinder 11, and the penetrating portion 32, and thus moves upward along the axial direction. .

  As the piston rod 51 moves upward, the piston portion 52 also moves upward. When the piston portion 52 moves upward, the volume of the suction chamber F, which is the space on the lower surface of the piston portion 52, the inner peripheral surface of the suction cover 17 and the upper surface of the first check valve 20, increases.

  However, at this time, since the suction port 22 is closed by the first check valve 20, the pressure in the suction chamber F decreases. Accordingly, when the pressure on the lower surface side of the first check valve 20 becomes higher than the pressure in the suction chamber F, the first check valve 20 moves upward and opens the suction port 22. As a result, water flows into the suction chamber F.

  Thus, until the piston part 52 moves to the top dead center, water is sucked into the suction chamber F, and water is pumped into the suction chamber F. At this time, in the second valve body 58 of the second check valve 59, the lower surface of the second valve body 58 contacts the second valve seat 56, that is, the opening 55a of the piston presser 55 is closed. For this reason, water does not move to the discharge chamber E.

  Next, the user rotates the operation rod 75 upward about the support shaft 73. When the operating rod 75 is turned upward, the link mechanism moves downward. At this time, the piston rod 51 moves downward along the axial direction.

  As the piston rod 51 moves downward, the piston portion 52 also moves downward. When the piston portion 52 moves downward, the pressure in the suction chamber F increases, the first check valve 20 is pressed in the closing direction, and the second check valve 59 is pressed in the opening direction. As a result, the water in the suction chamber F is pumped up to the discharge chamber E.

  In this way, by repeating the turning operation of the operating rod 75, the lever member 71 and the link member 72 are expanded and contracted with the support shaft 73 as a fulcrum, and the piston rod 51 is moved up and down (lifted and lowered). As a result, the piston part 52 also moves in the vertical direction. As a result, the first check valve 20 and the second check valve 59 are opened and closed, and water is pumped and discharged from the discharge port 31. At this time, the position where the piston portion 52 moves downward is not the bottom dead center, but the position where the lower surface of the connecting portion 60 contacts the upper surface of the ring member 80.

  When the piston rod 51 is moved up and down, the ring member 80 is formed so that the inner diameter of the ring member 80 is slightly larger than the outer diameter of the piston rod 51. Therefore, as shown in FIG. It will always be on the top surface.

Next, the operation when water collected in the suction chamber F and the discharge chamber E is precipitated after using the hand pump 1 will be described with reference to FIGS. 5 and 6.
First, the ring member 80 is opened from the slit 81 and detached from the upper surface of the guide tool 37. Next, the operating rod 75 is rotated in the axial direction (upward). By this rotation, as shown in FIG. 2, the lever member 71 and the operation rod 75 are inclined by about 5 °, for example, in the direction approaching the axial center.

  Thereby, the lower surface of the connection part 60 contacts the upper surface of the guide tool 37, and the piston part 52 moves to a bottom dead center. When the piston portion 52 moves to the bottom dead center in this way, the lower surface of the second valve body 58 and the second protrusion 27 of the cover member 18, and the lower surface of the piston retainer 55 and the first protrusion of the first valve body 29. 30 are in contact with each other and further pressed.

  When the lower surface of the second valve body 58 is pressed by the second protrusion 27, a flow path is formed between the second valve body 58 and the second valve seat 56, and the discharge chamber E and the suction chamber F are continuous. It becomes space to do.

  Similarly, when the first protrusion 30 of the first valve body 29 is pressed by the piston retainer 55, the first protrusion 30 is pressed downward at a position eccentric from the center of the first valve body 29. The single valve body 29 is separated from the first valve seat 28 except for a part of the lower surface thereof. Thus, the suction chamber F and the suction port 22 are continuous spaces.

  Thus, by opening each of the first valve body 29 and the second valve body 58, one continuous space from the suction port 22 to the discharge chamber E is formed. By being pushed by atmospheric pressure, the inside of the hand pump 1 The water accumulated in the water will flow back to the water source (precipitation).

  After the precipitation is finished, the first valve body 29 and the second valve body 58 respectively close the first valve seat 28 and the second valve seat 56 by arranging the ring member 80 on the upper surface of the guide tool 37 again.

  With the hand pump 1 having such a configuration, the ring member 80 is provided on the upper surface of the guide tool 37, and the upper surface of the ring member 80 and the lower surface of the connecting portion 60 are brought into contact with each other, so When pumping up, the piston part 52 is not moved to the precipitation position. For this reason, it becomes possible to perform pumping efficiently.

  Further, during the rain, it is only necessary to open the ring member 80 from the slit 81 and detach it from the guide tool 37. Since the ring member 80 can be attached and detached efficiently, workability can be improved. it can.

  Further, when the ring member 80 is replaced, it is only necessary to attach and detach the ring member 80, and the ring member 80 can be easily replaced.

  Furthermore, since the ring member 80 is formed of rubber, even if a finger or the like is sandwiched between the ring member 80 and the connecting portion 60, the ring member 80 absorbs an impact and elastically deforms. It will also prevent. In addition, it is possible to prevent the clothing or fingers from being caught in the gap between the piston rod 51 and the guide tool 37.

  Moreover, since it is possible to prevent the dust member and the like from entering the gap between the piston rod 51 and the guide tool 37 by the ring member 80, it is possible to prevent the piston rod 51 and the packing 35 from being damaged. . For this reason, it becomes possible to prevent leakage of water from the sliding surfaces of the piston rod 51 and the packing 35 due to scratches. Thus, it becomes possible to prevent leakage, thereby improving the pumping efficiency of the hand pump 1 and improving reliability.

  As described above, according to the hand pump 1 according to the present embodiment, the efficiency of the pump can be improved and the reliability can be improved by preventing precipitation and leakage due to erroneous operation. In addition, it is possible to prevent the pinching between the connecting portion 60 and the guide 37, and to improve the safety by reducing impact and pressure when a finger or the like is pinched between the lower surface of the connecting portion 60 and the ring member 80. It becomes possible.

Next, a hand pump 1A according to a second embodiment of the present invention will be described with reference to FIG.
FIG. 7 is a perspective view showing the ring member 82 of the hand pump 1A according to the second embodiment of the present invention. In FIG. 7, the same function parts as those in FIGS.

  The ring member 82 of the hand pump 1A includes a first ring member 83 provided on the upper surface of the guide 37, and a second ring member 84 whose upper surface is in contact with the lower surface of the connecting portion 60.

  The first ring member 83 is formed in a cylindrical shape having an inner diameter slightly larger than the outer diameter of the piston rod 51, and has a slit 85 provided at one location in the radial direction and the axial direction of the first ring member 83. . The first ring member 83 is formed of an elastic member such as rubber.

  The second ring member 84 has an inner diameter that is the same as or slightly smaller than the outer diameter of the piston rod 51, and has a slit 86 that is provided at one location in the radial direction and the axial direction of the second ring member 84. . The second ring member 84 is made of rubber.

  According to the hand pump 1A configured in this manner, during the pumping operation, the piston portion 52 moves upward from its bottom dead center by the thickness of the first ring member 83 and the second ring member 84, and slides up and down. Will move. For this reason, when pumping water with the hand pump 1A, it is possible to efficiently pump water without moving the piston portion 52 to the precipitation position.

  Further, when it rains, it is only necessary to open the first and second ring members 83 and 84 from the slits 85 and 86 and to detach them from the guide tool 37, and the workability can be improved.

  Also, when the first and second ring members 83 and 84 are replaced, it is only necessary to attach and detach the first and second ring members 83 and 84, and the first and second ring members 83 and 84 can be easily replaced. It becomes.

  Furthermore, the first and second ring members 83 and 84 are formed of rubber, and even if a finger or the like is sandwiched between the first ring member 83 and the second ring member 84, the first and second ring members 83 and 84 are vertically Because of the two ring members 83 and 84, the impact is absorbed more and injury is prevented by elastic deformation. In addition, it is possible to prevent the clothing or fingers from being caught in the gap between the piston rod 51 and the guide tool 37.

Further, since the first ring member 83 can prevent dust and the like from entering the gap between the piston rod 51 and the guide 37, it is possible to prevent the piston rod 51 and the packing 35 from being damaged. Further, by setting the inner diameter of the second ring member 84 to be the same as or slightly smaller than the outer diameter of the piston rod 51, the second ring member 84 can be fixed to the piston rod 51 by the restoring force of the second ring member 84. For this reason, it is not particularly necessary to provide a mounting member for the second ring member 84, and an increase in cost can be prevented.

  As described above, according to the hand pump 1A according to the present embodiment, the safety can be further improved.

  The present invention is not limited to the above embodiment. For example, although the above-described hand pumps 1 and 1A are configured to have a precipitation function, they can also be applied to a hand pump that does not have this precipitation function. For example, when used in a warm region where there is no risk of freezing, the manufacturing cost of the hand pump can be further reduced.

  Further, the ring member 80, the first and second ring members 83 and 84 described above have the slits 81, 85, and 86, respectively, but these are not provided with a slit and are assembled to the piston rod 51 when the hand pump is assembled. It is good also as such a structure. At this time, when used for a hand pump having a precipitation function, the ring member is elastically deformed by rotating it with a stronger force than usual at the time of rotation of the operation rod 75 in order to cause precipitation. Thin out. Thereby, if the piston part 52 is moved to the position where precipitation is possible, the water in the hand pump can be allowed to rain.

  Further, the above-described ring member 80, first and second ring members 83, 84 are configured not to be provided with a fixing member, but may be fixed with an adhesive, a screw or the like. By fixing, the piston rod 51 can no longer follow the vertical movement of the piston rod 51, so that it is possible to prevent dust from entering between the piston rod 51 and the penetrating portion 32.

  Furthermore, although each of the ring members 80, 83, 84 described above is formed of rubber, this can also be applied to other resin materials having elasticity, and is further covered with a bellows or the like using a spring or the like to prevent pinching. It can also be applied as a configuration.

  Moreover, it is applicable also as a structure which provides a relief valve or a check valve in the discharge port 31 mentioned above. Thereby, it becomes possible to discharge water in a state where the water pressure is further increased. In addition, various modifications can be made without departing from the scope of the present invention.

The perspective view which shows the external appearance of the manual pump which concerns on the 1st Embodiment of this invention. The fragmentary sectional view which shows typically the internal structure of the hand pump. The perspective view which shows the ring member used for the same hand pump. The perspective view which shows an example of use of the hand pump. The fragmentary sectional view which shows typically an example at the time of the precipitation function use of the hand pump. The perspective view which shows the principal part structure at the time of use of the precipitation function of the hand pump. The perspective view which shows the ring member of the hand pump which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 1A ... Hand pump, 10 ... Main body, 11 ... Cylinder, 11a ... Lower end part, 11b ... Upper end part, 12 ... Discharge chamber, 13 ... 1st flange part, 15 ... Cylindrical member, 16 ... 2nd flange part, 17 DESCRIPTION OF SYMBOLS ... Suction cover, 18 ... Cover member, 20 ... 1st check valve, 22 ... Suction port, 27 ... 2nd projection part, 30 ... 1st projection part, 31 ... Discharge port, 32 ... Through part, 34 ... Through-hole 35 ... packing member, 37 ... guide tool, 50 ... piston member, 51 ... piston rod, 52 ... piston part, 53 ... piston yoke, 54 ... piston, 59 ... second check valve, 60 ... coupling part, 70 ... Link mechanism, 71 ... Lever member (operating lever), 72 ... Link member, 75 ... Operating rod, 80 ... Ring member, 81, 85, 86 ... Slit, 82 ... First ring member, 83 ... Second ring member, E ... Discharge chamber, F Suction chamber.

Claims (8)

A cylindrical cylinder having a suction side at the lower end opening and a discharge side at the upper end opening;
A discharge chamber provided on the discharge side of the cylinder and having a discharge chamber communicating with the cylinder;
A piston whose outer peripheral portion is formed so as to be reciprocally slidable on the inner peripheral surface of the cylinder, and in which the inside of the cylinder is liquid-tight;
A piston rod that supports the one end of the piston located in the cylinder and is inserted into and removed from the cylinder;
An operation lever formed to be swingable around a fulcrum provided outside the cylinder or the discharge chamber;
A link mechanism that connects one end of the operating lever and the other end of the piston rod, and converts the swinging motion of the operating lever into the reciprocating motion of the piston rod;
Provided on the outer peripheral surface of the discharge chamber, the piston rod is inserted, and one end surface of the link mechanism portion connected to the piston rod is made of an elastic body so that it can come into contact when the piston mechanism is lowered. A cylindrical ring member formed,
A hand pump characterized by comprising.   The hand pump according to claim 1, wherein the ring member is formed of resin or rubber and has a slit provided from one end surface to the other end surface of the ring member. The cylinder has a first valve chamber at its lower end opening,
The piston has a second valve chamber therein;
A first opening provided in the first valve chamber and forming a flow path for the piston and the lower end opening; provided on the upper end opening side of the first opening; from the piston to the lower end opening. A first check valve having a first valve body formed so as to be able to close the flow path, and a first valve seat provided on a peripheral edge of the first opening to contact the first valve body;
A second opening provided in the second valve chamber and forming a flow path between the lower end opening and the upper end opening via the piston; provided on the upper end opening side of the second opening; A second valve body formed so as to be able to close a flow path from the opening to the lower end opening, and a second valve seat provided at a peripheral edge of the second opening and contacting the second valve body, A second check valve having;
The hand pump according to claim 1 or 2, wherein the hand pump is provided. A first projecting member provided on the first valve body and formed so as to be separated from the first valve seat of the first valve body by contacting the lower surface of the piston;
A second projecting member provided between the piston and the first check valve and formed so as to be able to be separated from the second valve seat by contacting the lower end surface of the second valve body. The hand pump according to claim 3, further comprising: A cylindrical cylinder having a suction side at the lower end opening and a discharge side at the upper end opening;
A discharge chamber provided on the discharge side of the cylinder and having a discharge chamber communicating with the cylinder;
A piston whose outer peripheral portion is formed so as to be reciprocally slidable on the inner peripheral surface of the cylinder, and in which the inside of the cylinder is liquid-tight;
A piston rod that is supported by one end of the piston located in the cylinder and is inserted into and removed from the cylinder;
An operation lever formed to be swingable around a fulcrum provided outside the cylinder or the discharge chamber;
A link mechanism that connects one end of the operating lever and the other end of the piston rod, and converts the swinging motion of the operating lever into the reciprocating motion of the piston rod;
A cylindrical first ring member provided on an outer peripheral surface of the discharge chamber, into which the piston rod is inserted, and formed of an elastic body;
Provided at the end of the link mechanism connected to the piston rod, the piston rod is inserted, and when the part of the link mechanism connected to the piston rod is lowered, the first A cylindrical second ring member formed of an elastic body so that the end surface of the ring member and the opposite end surface thereof can come into contact with each other;
A hand pump characterized by comprising.   6. The manual push according to claim 5, wherein the first ring member and the second ring member are formed of resin or rubber and have a slit provided from one end surface to the other end surface of the ring member. pump. The cylinder has a first valve chamber therein,
The piston has a second valve chamber at its lower end opening,
A first opening provided in the first valve chamber and forming a flow path for the piston and the lower end opening; provided on the upper end opening side of the first opening; from the piston to the lower end opening. A first check valve having a first valve body formed so as to be able to close the flow path, and a first valve seat provided on a peripheral edge of the first opening to contact the first valve body;
A second opening provided in the second valve chamber and forming a flow path between the lower end opening and the upper end opening via the piston; provided on the upper end opening side of the second opening; A second valve body formed so as to be able to close a flow path from the opening to the lower end opening, and a second valve seat provided at a peripheral edge of the second opening and contacting the second valve body, A second check valve having;
The hand pump according to claim 5 or 6, wherein the hand pump is provided. A first projecting member provided on the first valve body and formed so as to be separated from the first valve seat of the first valve body by contacting the lower surface of the piston;
A second projecting member provided between the piston and the first check valve and formed so as to be able to be separated from the second valve seat by contacting the lower end surface of the second valve body. The hand pump according to claim 7, further comprising:

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