JPWO2012032586A1 - Spraying equipment - Google Patents

Abstract

A pump provided outside the tank is supported with a simple structure. A tank (10) for storing a spray liquid, a piston pump (40) for applying pressure to the inside of the tank (10), and spraying the spray liquid in the tank (10) with the pressure of the piston pump (40) Spray gun (60). The tank (10) is provided with a recess (27) extending in the height direction on the outer peripheral portion, and the piston pump (40) is fitted into the recess (27) from the outside of the tank (10). Furthermore, the lower part (11D) of the tank (10) and the cylinder lower part (40E) of the piston type pump (40) are connected by a tank base (15), and the top part (11A) of the tank (10) and the piston type pump ( The cylinder upper part (40D) of 40) was connected with the upper cap (14).

Description

  The present invention relates to a spraying device for spraying a spray liquid in a tank by applying pressure of a pump.

  2. Description of the Related Art Conventionally, in a spraying device, a replenishing port of a tank for storing spray liquid is covered with a lid, and a pump for pressurizing the inside of the tank is provided outside the replenishing port. 1). In the configuration of Patent Document 1, since the pump is provided outside the tank and the pump is not exposed to the spray liquid, the pump can be prevented from being affected by corrosion or the like by the spray liquid. In addition, a configuration in which the pump and the lid are integrally formed and the pump is provided in the tank is conceivable. In this case, it is necessary to remove the pump together with the lid when the spray liquid is replenished, and the spray attached to the pump. There is a risk that the liquid may drip around. However, according to the configuration of Patent Document 1, since the pump is located outside the tank separately from the replenishing port, and it is not necessary to remove the pump when replenishing the spray liquid, it is possible to prevent dripping of the spray liquid. it can.

Utility Model Registration No. 2518285

  However, in Patent Document 1, the pump is placed upright on a tank cradle that supports the lower part of the tank, and is attached to the side surface of the tank via a plurality of connecting fittings provided on the side surface of the pump. As the number of parts increased, the structure became complicated. In particular, by manufacturing the tank and the pump by resin molding, the cost can be reduced and the weight can be reduced by the integral molding. In this case, it is necessary to provide a coupling bracket receiver between the coupling bracket and the pump. Yes, by providing this receiver, the pump is likely to be closed during resin molding. Since the inner diameter portion of the pump on which the piston slides is required to have high accuracy, the structure of the pump has to be made in consideration of the countermeasure against the closing, and there is a problem that the structure becomes complicated.

  This invention is made | formed in view of the situation mentioned above, and it aims at providing the spray apparatus which can support the pump provided in the outer side of the tank with a simple structure.

In order to achieve the above object, the present invention provides a tank for storing a spray liquid, a piston type pump that applies pressure to the inside of the tank, and a spray that discharges and sprays the spray liquid in the tank with the pressure of the piston type pump. Means, and the tank includes a hollow portion extending in a height direction on an outer peripheral portion, the piston pump extends at substantially the same height as the tank, and the hollow portion extends from the outside of the tank. A spraying device is provided, wherein the lower part of the tank and the lower part of the piston type pump are connected by a pedestal, and the upper part of the tank and the upper part of the piston type pump are connected by a cap.
According to this configuration, the piston-type pump extending at substantially the same height as the tank is fitted from the outside to the hollow portion extending in the height direction on the outer peripheral portion of the tank, and the lower portion of the tank and the piston-type pump The upper part of the tank and the upper part of the piston pump are connected by a cap. Thereby, the spray apparatus which can support the piston type pump provided in the outer side of the tank with a simple structure without using a connection metal fitting etc. can be provided.

Further, in the above-described configuration, the hollow portion is formed so that the inner end side in the radial direction of the tank is narrower than the outer side, and the piston type pump includes a cylinder in which the piston slides, and extends substantially parallel to the cylinder. A tube that pumps out the gas pushed out by the piston, the tube is formed to have a smaller diameter than the cylinder, and the piston pump is in a direction in which the tube is positioned on the inner end side of the recess. It is good also as a structure fitted by the said hollow part.
In this case, in the piston type pump, the tube having a smaller diameter than the cylinder is fitted into the recess portion in such a direction that the inner end side is positioned on the inner end side of the recess portion formed narrower than the outer side. For this reason, the piston pump can be positioned with a simple configuration.

The cylinder and the tube may be integrally manufactured by resin extrusion.
In this case, the piston-type pump has a cylinder and a tube extending substantially parallel to the cylinder, and the cylinder and the tube are integrally manufactured by extrusion molding of resin, so that the piston-type pump can be easily manufactured.

The top of the tank and the upper end of the tube may be connected, and a check valve may be provided at the upper end.
In this case, a check valve is provided at the upper end of the tube of the piston pump provided outside the tank, and the check valve can be prevented from being exposed to the spray liquid in the tank. It is possible to prevent the function from being affected by the spray liquid.
Furthermore, it is good also as a structure with which the said piston type pump was integrally provided with the cover which covers the said hollow part of the said tank.
In this case, by covering the dent portion with a cover integral with the piston pump, the piston pump can be protected from external force with a simple structure, and the dent portion can be hidden to improve the appearance.

Further, a replenishing port for replenishing the spray liquid may be provided at the top of the tank, the replenishing port may be covered with a lid, and a safety valve may be provided on the lid.
In this case, the spray liquid can be replenished from the replenishing port at the top of the tank without removing the piston pump, and the safety valve can be provided with a simple structure by providing the safety valve on the lid.
Moreover, you may accommodate the pipe | tube which connects the top part of the said tank, and the said upper end of the said tube in the said cap.
In this case, since the tube is not exposed to the outside, the tube can be protected by the cap and the appearance can be clearly shown.

  ADVANTAGE OF THE INVENTION According to this invention, the spraying apparatus which can support the pump provided in the outer side of the tank with a simple structure can be provided.

It is a disassembled perspective view of the spraying apparatus which concerns on embodiment of this invention. It is the top view which looked at the spraying apparatus from the upper part. It is III-III sectional drawing in FIG. It is a top view of an upper cap. It is side surface sectional drawing of a piston type pump. It is a plane sectional view of a piston type pump.

Hereinafter, a spray device according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view of a spray device according to an embodiment of the present invention.
The spray device 1 includes a tank 10 for storing a spray liquid, a piston pump 40 that applies pressure to the inside of the tank 10, and a spray gun 60 that discharges and sprays the spray liquid in the tank 10 with the pressure of the piston pump 40 ( Spraying means).

The tank 10 is a hollow container, and the tank main body 11 formed in a cylindrical shape, the replenishing port 12 for the spray liquid formed on the top 11A of the tank main body 11, and the circular opening of the replenishing port 12 are closed openably. A lid 13, an upper cap 14 (cap) that covers the upper part of the tank body 11, and a tank pedestal 15 (pedestal) that covers the lower part of the tank body 11 are configured.
Further, the outer peripheral surface 11B (outer peripheral portion) of the tank body 11 is formed with a recessed portion 27 in which the outer peripheral surface 11B is recessed inward.

The piston pump 40 is connected to the cylindrical cylinder 41 extending in the vertical direction, the piston 42 sliding in the cylinder 41 (see FIG. 2), and the piston 42, and used for the operation of moving the piston 42 up and down. A handle 43 and a tube 44 communicating with the cylinder 41 and extending vertically in parallel with the cylinder 41 are provided. The handle 43 is connected to the piston 42 by a piston shaft 42 </ b> A extending in the cylinder 41.
The piston pump 40 is accommodated in the recess 27 of the tank body 11.

  The spray gun 60 includes a cylindrical spray device main body 61 held by a worker who performs a spray operation, an operation lever 62 provided on the spray device main body 61, a liquid feed pipe 63 extending from the spray device main body 61, and a liquid feed. It has a nozzle 64 provided at the tip of the pipe 63 to atomize the spray liquid. The operator can switch the discharge of the spray liquid and adjust the discharge amount by operating the operation lever 62. Further, the spray form is changed by adjusting the nozzle 64.

FIG. 2 is a plan view of the spray device 1 as viewed from above. 3 is a cross-sectional view taken along the line III-III in FIG.
As shown in FIGS. 1 to 3, the top portion 11 </ b> A (upper portion of the tank) of the tank body 11 is formed so that the central portion where the replenishing port 12 is formed is the highest, and is downward from the replenishing port 12 toward the outer peripheral surface 11 </ b> B. It is inclined to. The replenishing port 12 is formed in an annular shape protruding upward, and a stepped upper edge step portion 12A extending upward toward the outer peripheral side is provided on the upper edge of the replenishing port 12. Here, the upper edge step portion 12A is provided in two steps. Further, a screw portion 12B into which the lid 13 is tightened is formed on the inner peripheral surface of the replenishing port 12.
A safety valve 13 </ b> A is provided on the upper surface of the lid 13. The safety valve 13A is activated when the pressure in the tank main body 11 becomes higher than a predetermined pressure, and releases the pressure to make the pressure in the tank main body 11 appropriate.

  A pump connection portion 16 and a spray gun connection portion 17 projecting upward are formed on the outer peripheral surface 11B side of the top portion 11A of the tank body 11. The pump connection part 16 and the spray gun connection part 17 are arranged on a straight line passing through the center of the tank body 11 in plan view, and face each other across the replenishing port 12.

A hose connector 18A is provided at an end of the pump connection hose 18 (pipe) connecting the piston pump 40 and the tank body 11 on the tank body 11 side, and the pump connection hose 18 is pumped via the hose connector 18A. Connected to the connection unit 16.
A hose connector 19A is provided at an end of the gun connecting hose 19 connected to the spray gun 60 on the tank body 11 side, and the gun connecting hose 19 is connected to the spray gun connecting portion 17 via the hose connector 19A. . Specifically, the hose connectors 18A and 19A are screwed into thread portions formed on the outer peripheral surfaces of the pump connection portion 16 and the spray gun connection portion 17, respectively. The lower end of the gun connection hose 19 reaches the bottom in the tank body 11.

  In addition, belt connection portions 20 and 20 projecting adjacent to the pump connection portion 16 and the spray gun connection portion 17 are formed on the top portion 11A. Both ends of a belt (not shown) used when an operator holds the spraying device 1 on the shoulder are connected to the belt connecting portions 20 and 20, respectively.

In the outer peripheral surface 11B of the tank main body 11, a groove portion 21 is provided at a boundary portion with the top portion 11A so as to substantially go around the outer peripheral surface 11B along the boundary portion. The upper cap 14 is fixed to the tank body 11 by engaging with the groove portion 21.
The lower surface 11C of the tank body 11 has a curved surface shape with the central portion protruding most downward, and a plurality of base connection protrusions 22 (see FIG. 3) protruding downward are formed on the outer peripheral surface 11B side of the lower surface 11C. Yes. Further, a stepped portion 23 recessed inward of the tank main body 11 is formed on the lower portion 11D (the lower portion of the tank) of the outer peripheral surface 11B so as to make a round around the outer peripheral surface 11B.

The tank pedestal 15 that supports the tank body 11 from below is formed in a cylindrical shape having substantially the same outer shape as the outer peripheral surface 11B, and its upper and lower surfaces are open. A plurality of support protrusions 24 projecting inward are formed on the inner peripheral surface 15 </ b> A of the tank base 15. Further, a pump support base 25 protruding inward is formed on the inner peripheral surface 15A.
The tank pedestal 15 is made of resin and is integrally molded by injection molding (extrusion molding).

  The support protrusion 24 is formed with an engagement hole 24 </ b> A for engaging each pedestal connection protrusion 22 of the tank body 11. The upper part of the tank pedestal 15 is an engagement wall 26 that engages with the step part 23 of the tank body 11 over the entire circumference. That is, the tank pedestal 15 is assembled so as to be pressed against the lower surface 11 </ b> C from below the tank body 11, and the engagement holes 24 </ b> A and the engagement walls 26 engage with the pedestal coupling protrusions 22 and the step portions 23 of the tank body 11. It is fixed by that.

FIG. 4 is a plan view of the upper cap 14.
As shown in FIGS. 1 to 4, the upper cap 14 is formed in a disk shape and covers the top portion 11 </ b> A of the tank body 11 from above.
The upper cap 14 includes a disk-shaped disk portion 14A having substantially the same diameter as the outer peripheral surface 11B, an annular side wall portion 14B extending downward from the peripheral edge of the disk portion 14A, and the center of the disk portion 14A. And a funnel portion 28 protruding upward.
The upper cap 14 is made of resin and is integrally formed by injection molding.

  The funnel portion 28 includes an annular wall portion 28A that protrudes upward from the radial intermediate portion of the circular plate portion 14A, and an inclined plate portion that is inclined downward from the upper edge of the annular wall portion 28A toward the inside in the radial direction. 28B and an opening 28D serving as an inlet for the spray liquid. Since the funnel portion 28 is formed in a plate shape and protrudes upward, a space S surrounding the replenishing port 12 is formed between the funnel portion 28 and the top portion 11 </ b> A of the tank body 11.

When replenishing the tank body 11 with the spray solution, the spray solution can be easily replenished because the spray solution can flow to the refill port 12 along the inclined plate portion 28B.
The lower portion of the inclined plate portion 28B has a stepped funnel side step portion 28C formed in substantially the same shape as the stepped upper edge step portion 12A of the replenishing port 12, and the upper edge step portion 12A and the funnel side step. The part 28 </ b> C is assembled in a contact state so that there is almost no gap between them. In this way, the upper edge step 12A and the funnel side step 28C are formed in a plurality of steps and brought into contact with each other, thereby preventing liquid from passing between the upper edge step 12A and the funnel side step 28C. The spray liquid can be prevented from dripping from the replenishing port 12 to the outside.

  The disc part 14A of the upper cap 14 has a relief hole 29A through which the pump connection part 16 of the top part 11A penetrates, a 29B through which the spray gun connection part 17 penetrates, and a cylinder holding hole through which the cylinder 41 of the piston pump 40 penetrates. 30 is formed. Further, the escape holes 31, 31 through which the belt connecting portions 20, 20 pass are formed adjacent to the escape holes 29A, 29B.

In the annular wall portion 28A, in the vicinity of the escape hole 29A, a hose through hole 32 for communicating the space S to the outside is formed.
An annular convex portion 14C (see FIG. 3) protruding radially inward is formed on the lower edge of the side wall portion 14B of the upper cap 14, and the annular convex portion 14C of the upper cap 14 has an outer peripheral surface 11B. It is fixed to the tank body 11 by being fitted in the groove portion 21 at the top of the tank.

As shown in FIGS. 1 to 3, the outer peripheral surface 11 </ b> B of the tank main body 11 is formed with a recessed portion 27 in which a part of the outer peripheral surface 11 </ b> B is recessed inward toward the central portion of the tank main body 11. The recess 27 extends in the height direction of the tank body 11 and penetrates the tank body 11 in the vertical direction. Further, the inner end surface 27 </ b> A (inner end) of the recessed portion 27 is recessed to a position near the outer peripheral surface of the replenishing port 12 in the radial direction of the tank body 11. The tank body 11 is made of resin and is formed hollow by blow molding. The depression 27 is formed during blow molding and can be easily provided.
A piston type pump 40 fitted from the outside of the tank body 11 is accommodated in the recess 27.

  FIG. 5 is a side sectional view of the piston pump 40. 6 is a plan sectional view of the piston type pump 40. FIG. 6 (A) is a VI-VI sectional view, FIG. 6 (B) is a VII-VII sectional view, and FIG. 6 (C) is a VIII-VIII sectional view. It is. Here, in FIG.5 and FIG.6, the state where the piston 42 is not provided is shown. Further, in FIG. 6, illustration of a check valve 51 described later is omitted.

As shown in FIGS. 3, 5, and 6, the cylinder 41 and the tube 44 extend vertically in parallel with each other, and are integrally connected by a connecting rib 45 that extends between the outer peripheral surfaces of the cylinder 41 and the tube 44. Has been. The connecting ribs 45 are formed in a plate shape orthogonal to the axial direction of the cylinder 41, and a plurality of the connecting ribs 45 are formed side by side in the axial direction at intervals. The outer diameter of the tube 44 is formed to be smaller than the outer diameter of the cylinder 41, and the width of the connecting rib 45 is formed so as to taper toward the tube 44 side.
The cylinder 41 and the tube 44 are also connected by a connecting portion 46 formed at the lower end. The connecting portion 46 is formed with a communication passage 47 that allows the cylinder chamber 41C in the cylinder 41 and the internal passage 44A in the tube 44 to communicate with each other. Has been. The connecting portion 46 has a cap attachment portion 46 </ b> A that extends in the radial direction from the lower end of the tube 44.

  As shown in FIG. 1, FIG. 6 (A) and FIG. 6 (B), the portion on the opposite side of the tube 44 on the outer peripheral surface of the cylinder 41 is covered with the recess 27 while being set in the recess 27. A cover plate 55 (cover) is formed so as to protrude from the top. The cover plate 55 is generally provided continuously above and below the cylinder 41, but is not provided in a portion that overlaps the upper cap 14 and the tank base 15 when set in the recessed portion 27. That is, the cover plate 55 is provided so as to cover the recess 27 so as to connect the side wall 14B of the upper cap 14 and the outer peripheral surface 15B of the tank pedestal 15, so that the recess 27 is difficult to be seen from the outside. . Further, the side wall portion 14B, the outer peripheral surface 15B, and the cover plate 55 are provided so as to be substantially flush with each other, so that the appearance is good and the catch is hardly generated.

  As shown in FIG. 6C, a rib 56 is formed on the bottom of the cylinder 41 so as to project in an arc shape from the outer peripheral surface of the cylinder 41 outward in the radial direction. The rib 56 is formed continuously with the connecting portion 46, is formed in a substantially half region in the circumferential direction on the outer peripheral surface of the cylinder 41, and has a semicircular shape.

  The piston pump 40 is made of resin and is formed by injection molding. Specifically, the cylinder 41, the tube 44, the connecting rib 45, and the connecting portion 46 are integrally formed by injection molding, and the cylinder 41 and the tube 44 are formed hollow at the time of injection molding. The communication passage 47 formed in the connecting portion 46 is orthogonal to the axial direction of the cylinder 41 and the tube 44, and if formed by injection molding, the mold for injection molding becomes complicated. For this reason, the communication path 47 is formed by machining with a drill inserted from the end of the cap attachment portion 46A after injection molding. The hole formed in the cap attachment portion 46A by machining is closed by a closing cap 48 (see FIG. 3) that is screwed into a screw portion formed in the cap attachment portion 46A.

Thus, since the cylinder 41 and the tube 44 extending in parallel with each other are integrally formed by injection molding, the piston pump 40 can be easily manufactured.
Further, the plate thickness of each connecting rib 45 is set to a sufficiently thin plate thickness that does not cause resin molding shrinkage on the inner peripheral surface 41 </ b> A of the cylinder 41. For this reason, the airtightness between the cylinder 41 and the piston 42 can be ensured.

As shown in FIGS. 3 and 5, a threaded portion 41B is formed on the outer peripheral surface of the upper end of the cylinder 41, and a cylinder lid 49 that seals the cylinder 41 is screwed into the threaded portion 41B. The cylinder lid 49 slidably supports the piston shaft 42A. In addition, a flange portion 50 protruding outward in the radial direction is formed in the upper portion of the cylinder 41 below the screw portion 41B.
The piston-type pump 40 extends to the same height as the tank body 11 including the height of the handle 43, and the cylinder lid 49 and the flange portion 50 of the cylinder 41 are located above the top portion 11A.

At the upper end of the tube 44, a tube side hose connection portion 53 (upper end) to which the end of the pump connection hose 18 on the piston pump 40 side is connected is formed. Specifically, the pump connection hose 18 is connected to the tube 44 by the hose connector 54 provided at the end of the pump connection hose 18 being screwed into the threaded portion of the outer peripheral surface of the tube side hose connection portion 53. .
The tube side hose connection part 53 and the hose connection tool 54 are located in the recessed part 27 below the top part 11 </ b> A of the tank body 11.

  As shown in FIGS. 2 and 3, the pump connection hose 18 connected to the tube side hose connection portion 53 extends upward to enter the space S of the upper cap 14, passes through the space S, and goes outside the hose through hole 32. And connected to the pump connector 16 via the hose connector 18A. Thus, since the pump connection hose 18 passes through the inside of the upper cap 14 and most of the pump connection hose 18 is not exposed to the outside, the pump connection hose 18 can be protected and the appearance can be improved.

  As shown in FIGS. 3 and 5, a valve accommodating chamber 52 that accommodates the check valve 51 is formed inside the tube side hose connection portion 53. The check valve 51 includes a shaft portion 51A inserted into the internal passage 44A of the tube 44, a flange portion 51B that regulates the position of the check valve 51, and an O-ring 51C that is pressed against the flange portion 51B. ing. The check valve 51 is movable up and down in the valve storage chamber 52, permits the flow of air (gas) flowing from the piston pump 40 into the tank body 11, and passes from the tank body 11 to the piston pump 40. Regulate the flow of backflowing air and spray.

  A plurality of protrusions are provided on the peripheral edge of the upper surface of the flange portion 51B at intervals in the circumferential direction, so that air holes 51D are formed between the protrusions. Air from the tube 44 passes through the air holes 51D. Pass through to the pump connection hose 18. A plurality of inner peripheral ribs 52 </ b> A for guiding the flange portion 51 </ b> B are formed on the inner peripheral surface of the valve storage chamber 52.

The piston-type pump 40 is accommodated in the recess 27 so that the tube 44 faces the inner end surface 27A of the recess 27, and the cylinder lower part 40E (lower part of the piston-type pump) in the vicinity of the communication path 47 is the pump of the tank base 15. A cylinder upper part 40D (upper part of the piston type pump) in the vicinity of the flange part 50 is supported by the support base 25, and is supported by the upper cap 14.
The recess 27 is formed in a shape corresponding to the piston type pump 40, and is formed so that the width becomes narrower toward the inner end face 27A (see FIG. 2). Thus, since the hollow part 27 has a shape corresponding to the piston type pump 40, the rotation in the hollow part 27 of the piston type pump 40 can be controlled.

Specifically, the cylinder lower portion 40E is fitted between the recess 27 and the inner peripheral surface 15A of the tank base 15 while being supported by the pump support base 25 from below, and the radial direction of the tank body 11 In addition, movement in the circumferential direction is restricted.
The cylinder upper portion 40 </ b> D is supported by being inserted into the cylinder holding hole 30 of the upper cap 14 fixed to the tank body 11. The peripheral position 30 </ b> A (see FIG. 3) of the cylinder holding hole 30 is restricted in the upward position by a cylinder lid 49 positioned above. The lower surface of the peripheral portion 30A is in contact with the upper surface of the flange portion 50 and presses the cylinder 41 against the pump support base 25 side. That is, the position of the cylinder 41 in the vertical direction is regulated so as to be sandwiched between the lower surface of the peripheral portion 30A and the pump support base 25. Further, the cylinder upper portion 40 </ b> D is regulated in the radial direction and the circumferential direction position of the tank body 11 by the outer peripheral surface coming into contact with the peripheral portion 30 </ b> A of the cylinder holding hole 30.

Next, a procedure for assembling the piston pump 40 to the tank body 11 will be described.
First, the tank base 15 is assembled to the tank body 11. Here, each support protrusion 24 of the tank pedestal 15 is arranged so that the pump support pedestal 25 is positioned below the recess 27 when the tank pedestal 15 is assembled.
Next, the piston type pump 40 is fitted into the recess 27 and the cylinder lower part 40E is placed on the pump support 25.

  Thereafter, the piston pump 40 is in a state in which the cylinder lid 49 and the handle 43 are removed, and the upper cap 14 is assembled to the tank body 11 in this state. Specifically, the upper cap 14 is positioned at the top 11A by the escape holes 29A, 29B, 31 and the cylinder holding hole 30 being inserted into the pump connection part 16, the spray gun connection part 17, the belt connection part 20 and the cylinder upper part 40D. Then, the annular convex portion 14 </ b> C is fixed by being engaged with the groove portion 21. As shown in FIGS. 2 and 3, the upper cap 14 includes, in addition to the peripheral portion 30A of the cylinder holding hole 30, peripheral portions of the escape holes 29A and 29B of the disc portion 14A, the pump connecting portion 16 and The position in the vertical direction is regulated so as to be pressed from above by the hose connectors 18A and 19A that are fastened to the spray gun connection part 17, respectively. Thus, since the cylinder lid 49 and the hose connectors 18A and 19A regulate the position of the upper cap 14 in the vertical direction, the upper cap 14 can be reliably fixed.

In the present embodiment, the recessed portion 27 is formed at the time of blow molding of the tank body 11, the piston pump 40 is accommodated in the recessed portion 27, and the cylinder upper portion 40D and the cylinder lower portion 40E of the piston pump 40 are molded by injection molding. Since the upper cap 14 and the tank pedestal 15 attached to the tank body 11 are supported by the upper cap 14 and the tank pedestal 15, respectively, it is not necessary to form a complicated shaped member for supporting the piston pump 40 in the tank body 11 by blow molding. The main body 11 can be easily manufactured.
In addition, since the piston pump 40 is accommodated in the recess 27 and supported by the upper cap 14 and the tank base 15, there is no need to provide a member for attaching the piston pump 40 to the tank body 11 in the piston pump 40. The cylinder 41 can have a simple structure. For this reason, it is possible to prevent the inner peripheral surface 41 </ b> A of the cylinder 41, which requires high accuracy, from shrinkage during injection molding.

  Further, since the piston pump 40 is provided not in the tank main body 11 but in the outer depression 27, the outer peripheral surface of the cylinder 41 is not compressed by the pressure in the tank main body 11. For this reason, the thickness of the cylinder 41 can be reduced and the weight can be reduced.

When the inside of the tank body 11 is pressurized during the spraying operation, the piston 42 is moved up and down through the handle 43, and the air pushed out by the piston 42 is pumped through the tube 44, and the check valve 51 and the pump It is supplied into the tank body 11 through the connection hose 18. The outlet of the pump connection hose 18 in the tank main body 11 is located above the tank main body 11 and is provided above the highest level of the spray liquid stored in the tank main body 11. For this reason, it is difficult for the spray liquid in the tank main body 11 to flow backward to the piston pump 40 side.
Further, the check valve 51 is provided in the tube 44 outside the tank body 11, and the check valve 51 is not immersed in the spray liquid, and the check valve 51 is prevented from being exposed to a large amount of the spray liquid. Therefore, it is possible to reduce the influence of the check valve 51 sticking or corrosion due to contact with the spray liquid.

  When refilling the tank body 11 with the spray liquid, the lid 13 can be removed and the spray liquid can be replenished from the refill port 12. That is, since the piston pump 40 is not provided in the replenishing port 12 and is provided outside the tank main body 11, it is not necessary to remove the piston pump 40 when replenishing the tank main body 11 with the spray liquid. Easily replenished with spray solution and good workability. Further, in the case where the piston pump 40 is provided in the tank main body 11, when the piston pump 40 is removed, the spray liquid may drip from the piston pump 40, but in this embodiment, the lid 13 Since the tank body 11 can be accessed simply by removing the, the dripping of the spray liquid can be prevented.

  As described above, according to the embodiment to which the present invention is applied, the piston pump 40 that extends at substantially the same height as the tank body 11 extends in the height direction on the outer peripheral surface 11B of the tank body 11. The recessed portion 27 is fitted from the outside, the lower portion 11D of the tank body 11 and the cylinder lower portion 40E are connected by the tank base 15, and the top portion 11A of the tank body 11 and the cylinder upper portion 40D are connected by the upper cap 14. . Thereby, the spray apparatus which can support the piston type pump 40 provided in the outer side of the tank main body 11 with a simple structure, without using a connection metal fitting etc. can be provided.

Further, the piston type pump 40 has a tube 44 smaller in diameter than the cylinder 41 fitted in the recess 27 in such a direction that the inner end surface 27A is positioned on the inner end surface 27A side of the recess 27 formed narrower than the outer side. Match. Thereby, the rotation of the piston pump 40 in the axial direction can be restricted by the recess 27, and the piston pump 40 can be positioned with a simple configuration.
Further, the piston pump 40 has a cylinder 41 and a tube 44 extending substantially parallel to the cylinder 41, and the cylinder 41 and the tube 44 are integrally manufactured by resin injection molding. Easy to manufacture.
Further, a check valve 51 is provided at the upper end of the tube 44 of the piston pump 40 provided outside the tank main body 11, and the check valve 51 is prevented from being exposed to the spray liquid in the tank main body 11. Therefore, the function of the check valve 51 can be prevented from being affected by the spray liquid.

Furthermore, by covering the recess 27 with the cover plate 55 integral with the piston pump 40, the piston pump 40 can be protected from external force with a simple structure, and the recess 27 can be hidden to improve the appearance. .
Furthermore, the spray liquid can be replenished from the replenishment port 12 of the top 11A of the tank body 11 without removing the piston pump 40, and the safety valve 13A can be provided with a simple structure by providing the lid 13 with the safety valve 13A. .
Further, since the pump connection hose 18 that connects the pump connection portion 16 at the top portion 11A of the tank body 11 and the tube side hose connection portion 53 at the upper end of the tube 44 is accommodated in the space S in the upper cap 14, the pump connection hose 18 is Not exposed to the outside. For this reason, while being able to protect the pump connection hose 18 with the upper cap 14, the external appearance of the spraying apparatus 1 can be shown clearly.

In addition, the said embodiment shows the one aspect | mode which applied this invention, Comprising: This invention is not limited to the said embodiment.
In the above embodiment, the cylinder lower portion 40E is described as being fitted between the recess 27 and the inner peripheral surface 15A of the tank pedestal 15 while being supported by the pump support base 25 from below. The present invention is not limited to this. For example, the cylinder lower portion 40E may be supported by providing the pump support base 25 with an engaging portion that engages the rib 56 and the connecting portion 46 of the cylinder lower portion 40E. . Moreover, it is needless to say that other detailed configurations of the spray device 1 can be arbitrarily changed.

1 Spraying device 10 Tank 11A Top (upper part of tank)
11D Lower part (lower part of tank)
12 Replenishment port 13 Lid 13A Safety valve 14 Upper cap (cap)
15 Tank pedestal (pedestal)
18 Pump connection hose (pipe)
27 Indentation 27A Inner end face (inner end)
40 Piston pump 40D Cylinder top (top of piston pump)
40E Lower cylinder (lower piston pump)
41 Cylinder 42 Piston 44 Tube 51 Check valve 55 Cover plate (cover)
60 Spray gun (spraying means)

Claims (7)

A tank that stores the spray liquid, a piston pump that applies pressure to the inside of the tank, and a spray means that discharges and sprays the spray liquid in the tank at the pressure of the piston pump.
The tank includes a hollow portion extending in the height direction on the outer peripheral portion,
The piston-type pump extends at substantially the same height as the tank, is fitted into the recess from the outside of the tank, and connects the lower portion of the tank and the lower portion of the piston-type pump with a pedestal, A spraying apparatus characterized in that an upper part of a tank and an upper part of the piston type pump are connected by a cap. The hollow portion is formed such that the inner end side in the radial direction of the tank is narrower than the outer side,
The piston type pump has a cylinder in which the piston slides, and a tube that extends substantially in parallel with the cylinder and pumps the gas pushed out by the piston,
The said tube is formed in a diameter smaller than the said cylinder, and the said piston type pump is fitted by the said hollow part in the direction in which the said tube is located in the inner end side of the said hollow part. Spraying equipment.   The spray device according to claim 2, wherein the cylinder and the tube are integrally manufactured by resin extrusion molding.   The spray device according to claim 2 or 3, wherein a top portion of the tank and an upper end of the tube are connected, and a check valve is provided at the upper end.   The spray device according to any one of claims 1 to 4, wherein the piston pump is integrally provided with a cover that covers the hollow portion of the tank.   The spraying device according to any one of claims 1 to 5, wherein a replenishing port for replenishing the spray liquid is provided at the top of the tank, the replenishing port is covered with a lid, and a safety valve is provided on the lid.   The spraying device according to claim 4, wherein a pipe connecting the top of the tank and the upper end of the tube is accommodated in the cap.

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