JP6105915B2 - Spraying device - Google Patents

Description

  The present invention relates to a spraying device for spraying a liquid.

  Conventionally, as a spraying device, for example, a sprayer that sprays a chemical solution is known (see, for example, Patent Document 1). The sprayer of Patent Document 1 includes a chemical tank that stores a chemical, a pump that pumps the chemical in the chemical tank to the spray nozzle, a pressure regulating valve that controls the spray pressure, and the like. The pump is connected to the chemical liquid tank by a water absorption pipe, and is fixed by a fastener fixed to the chemical liquid tank by a screw. The pressure regulating valve is connected to the pump by a water discharge pipe and is connected to a chemical liquid tank by a spill pipe, and is supported by these pipes.

Japanese Patent No. 4181474

  In the above-described sprayer, the flow path is longer by the amount of each pipe disposed, and the apparatus is enlarged. In addition, there are locations where the leakage of liquid is confirmed at both ends of each pipe, and management is complicated accordingly. Further, since the fasteners are used for fixing, the number of parts and the number of assembling steps are increased, which may increase the manufacturing cost. Furthermore, it is necessary to form a screw hole for fixing the fastener in the pump, which complicates manufacturing.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a spraying device capable of reducing the size, facilitating management, facilitating manufacturing, and reducing the manufacturing cost. To do.

The spraying device (1) of the present invention is a spraying device (1) for spraying liquid, and includes a tank (2) for storing the liquid and a pump (3) for pumping to spray the liquid in the tank (2). The tank (2) has a supply port (26) for supplying liquid to the pump (3), and the supply port (26) is connected to the supply port (26). (27) is fixed, and the pump (3) has a pump inlet pipe (31) that protrudes outward from the casing (33) of the pump (3) and sucks liquid from the tank (2), pump inlet pipe (31) by being fixed to a water port provided integrally (27a) to the connecting member (27), a pump (3) is fixed to the tank (2).

  In this spraying device (1), the connecting body (27) is fixed to the supply port (26) of the tank (2), and the pump (3) is connected to the pump inlet pipe (31) protruding outward from the casing (33). ) Is fixed to the tank (2) by being fixed to the water absorption port (27a) provided integrally with the connection body (27). For this reason, in addition to the pump inlet pipe (31) and the water absorption port (27a), a member for connecting or fixing the tank (2) and the pump (3) becomes unnecessary, and the size can be reduced. In addition, the number of parts and the number of assembling steps can be reduced, and the manufacturing cost can be reduced. Furthermore, since the connection part of a tank (2) and a pump (3) is collected by the connection body (27), a liquid leak etc. can be confirmed easily and management can be facilitated. In addition, since it is not necessary to provide a screw hole or the like for attaching the pump (3) in the tank (2), the manufacturing can be facilitated.

Here, the connection body (27) may be formed of an elastic body. In this case, since the vibration generated in the pump (3) can be absorbed by the connecting body (27), noise and the like can be suppressed. The pump (3) is provided with a motor (5).

  Further, the pump (3) includes a pressure regulating valve (4) for controlling the pressure of the liquid, and the pressure regulating valve (4) protrudes outward from the casing (44) of the pressure regulating valve (4) to tank excess liquid. It has a spillage pipe (43) to be returned to (2), and the spillage pipe (43) is fixed to a sewage port (27b) provided integrally with the connecting body (27), so that the tank (2 ) May be fixed. In this case, the pump (3) is fixed to the tank (2) by fixing the spill pipe (43) and the sewage port (27b) in addition to fixing the pump inlet pipe (31) and the water absorption port (27a). Therefore, the fixing strength between the pump (3) and the tank (2) can be increased. Furthermore, since the connection part of a tank (2) and a pressure regulation valve (4) is collected by the connection body (27), a liquid leak can be confirmed more easily and management is further facilitated. Can do.

  The connecting body (27) may be provided with a rib (27c) for reinforcing at least one of the water absorption port (27a) and the spillage port (27b). In this case, the strength of the connection body (27) can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the spraying device which can aim at size reduction, easy management, easy manufacture, and reduction of manufacturing cost.

It is a rear view of the spreading device concerning an embodiment of the present invention. It is a right view of the spraying apparatus shown in FIG. It is a perspective view which shows the spreading | diffusion apparatus with which the bracket was removed. It is the rear view to which the A section in FIG. 3 was expanded. It is a disassembled perspective view which shows the chemical | medical solution tank and pump unit in FIG. It is VI-VI arrow line view in FIG. It is a perspective view which shows the pump unit in FIG. It is a disassembled perspective view which shows the pump unit of FIG. It is the IX-IX arrow line view in FIG. FIG. 10 is a perspective view showing a lid in FIG. 9. It is a XI-XI arrow line view in FIG. It is a perspective view which shows the pressure regulation valve in FIG.

  Hereinafter, embodiments of a spraying apparatus according to the present invention will be described with reference to the accompanying drawings. In the following description, the terms “upper” and “lower” and “front” and “backward” are directions with reference to the case of the operator carrying the backpack type power sprayer 1, and the left and right words are the operations carried on the backpack type power sprayer 1. The direction is based on the case where the person is viewed from the front.

  1 is a rear view of a spraying device according to an embodiment of the present invention, FIG. 2 is a right side view of the spraying device shown in FIG. 1, FIG. 3 is a perspective view showing the spraying device with a bracket removed, and FIG. It is the rear view which expanded the A section inside.

  As shown in FIG. 1 to FIG. 4, the backpack-type power sprayer 1 that is a spraying device sprays the chemical liquid (liquid) stored in the chemical liquid tank 2 while the operator carries the chemical liquid tank 2 and the like. belongs to. As shown in FIGS. 3 and 4, the backpack type power sprayer 1 includes a pump unit U having a pump 3 and a motor 5 in addition to the chemical liquid tank 2. In the drawing, the back strap for the operator to carry the chemical tank 2 and the like is removed.

  The chemical tank 2 has a recess 21 in which the pump unit U and the like are disposed. The concave portion 21 is formed in the lower part of the chemical tank 2 and on the outer peripheral surface of the rear part. The recessed portion 21 is opened downward, rearward, and laterally in a state where a bracket 6 described later is removed.

  The chemical liquid tank 2 has a draining portion 23 protruding downward on the bottom surface 22 thereof. The draining portion 23 is provided at a portion where the bottom wall 22 and the wall surface 24 that forms the recess 21 intersect with each other, that is, the rear end portion of the bottom surface 22. The draining portion 23 extends in the left-right direction, and protrudes below the bottom surface 22 in the entire extending direction. The chemical liquid tank 2 has a pair of legs 25 and 25 projecting downward at the lower end thereof. As shown in FIG. 2, a backrest C that is in contact with the operator's back is attached to the front surface of the chemical tank 2.

  As shown in FIGS. 1 and 2, the bracket 6 is attached to the recess 21. The bracket 6 covers the pump unit U from below, rearward, and left and right sides. The bracket 6 has a pair of legs 61 and 61 projecting downward at the lower end thereof. The lower end part of the above-mentioned draining part 23 is located above the lower end part of the leg parts 25 and 25 and the lower end part of the leg parts 61 and 61, for example, when the backpack type power sprayer 1 is grounded, etc. Do not ground. The bracket 6 is provided with a power switch 62 of the backpack type power sprayer 1 and a battery case 63 in which the battery of the motor 5 is accommodated.

  Next, the connection between the medicine tank 2 and the pump unit U will be described in detail.

  5 is an exploded perspective view showing the chemical tank and the pump unit in FIG. 3, FIG. 6 is a view taken along arrow VI-VI in FIG. 4, FIG. 7 is a perspective view showing the pump unit in FIG. 7 is an exploded perspective view showing the pump unit 7, FIG. 9 is a perspective view showing the lid in FIG. 9, FIG. 10 is a perspective view showing the lid in FIG. 9, and FIG. FIG. 12 is a perspective view showing the pressure regulating valve in FIG.

  As shown in FIG. 5, the chemical liquid tank 2 has a supply pipe (supply port) 26 that supplies chemical liquid to the pump 3 on the right side of the wall surface 24 facing rearward. The supply pipe 26 has a cylindrical shape communicating with the inside and outside of the chemical liquid tank 2 and protrudes rearward from the wall surface 24. As shown in FIGS. 5 to 10, a lid (connector) 27 is attached to the supply pipe 26. The lid 27 has a substantially cylindrical shape with one end at the bottom, and is externally inserted into the supply pipe 26. The lid 27 is formed of an elastic body. Specifically, the lid 27 is formed of a material softer than the material forming the chemical liquid tank 2. Specifically, the chemical tank 2 is made of, for example, polyethylene, and the lid 27 is made of, for example, soft vinyl chloride. The lid 27 is fixed to the supply pipe 26 by tightening with a band B1 that is extrapolated to the outer peripheral surface thereof.

  As shown in FIG. 10, the lid 27 is integrally provided with a water absorption port 27 a and a spillage port 27 b. The water absorption port 27a and the surplus water port 27b protrude outward from the end surface of the lid 27 (rearward when the lid 27 is attached to the supply pipe 26). That is, the water absorption port 27a and the surplus water port 27b protrude in the same direction. The water absorption port 27 a is provided in the vicinity of the right end portion of the end surface of the lid 27, and the remaining water port 27 b is provided in the vicinity of the left end portion of the end surface of the lid 27. The water absorption port 27a and the spill water port 27b each have a cylindrical shape, the water absorption port 27a has a first through hole P1 that communicates the inside and outside of the lid 27, and the spill water port 27b is the lid 27 The second through-hole P2 that communicates between the inside and the outside is provided.

  A reinforcing rib 27 c is provided on the end surface of the lid 27. The ribs 27 c protrude outward from the end face of the lid 27 (rearward with the lid 27 attached to the supply pipe 26). The rib 27c has a substantially circular shape when viewed from the axial direction of the lid 27, and the semicircles are provided so as to connect the water absorption port 27a and the spillage port 27b from above and below, respectively. Specifically, the rib 27 c connects the outer peripheral surface of the water absorption port 27 a and the end surface of the lid 27, and connects the outer peripheral surface of the remaining water port 27 b and the end surface of the lid 27. For example, the rib may have a shape extending along the axial direction of the lid 27 so as to connect the outer peripheral surface of the water absorption port 27 a and the cylindrical surface 27 d of the lid 27. Further, the rib may have a shape extending along the axial direction of the lid 27 so as to connect the outer peripheral surface of the spillage port 27b and the cylindrical surface 27d of the lid 27, for example. The point is that the rib may protrude from the outer peripheral surface of at least one of the water absorption port 27a and the spillage port 27b so that at least one of the water absorption port 27a and the spillage port 27b can be reinforced.

  As shown in FIG. 6, the pump 3 pumps the chemical liquid in the chemical liquid tank 2 from a nozzle (not shown), and pumps a pipe inlet pipe 31 (FIG. 8, FIG. 8) that sucks the chemical liquid from the chemical liquid tank 2. 9) and a pump outlet pipe 32 (see FIG. 11) for pumping and sending the chemical solution. Each of the pump inlet pipe 31 and the pump outlet pipe 32 protrudes outward from the casing 33 of the main body of the pump 3 and has a cylindrical shape communicating with the inside and outside of the casing 33.

  As shown in FIGS. 8 and 9, the pump inlet pipe 31 protrudes forward in a state where the pump 3 is fixed to the chemical liquid tank 2. The pump inlet pipe 31 is inserted into the water absorption port 27a from the first through hole P1 opened at the tip of the water absorption port 27a of the lid 27. Between the water absorption port 27a and the pump inlet pipe 31, a water absorption hose H for inhaling the chemical liquid is interposed. The water absorption port 27a, the water absorption hose H, and the pump inlet pipe 31 are tightened together by tightening the band B2 that is externally inserted into the water absorption port 27a, and are fixed to each other. Thereby, the pump 3 is attached to the chemical | medical solution tank 2 without lengthening a flow path. The tip of the water absorption hose H hangs down to the bottom of the chemical tank 2.

  As shown in FIG. 6, the pump 3 includes a pressure regulating valve 4. The pressure regulating valve 4 controls the pressure of the chemical solution sprayed from the nozzle, and is arranged on the downstream side of the main body of the pump 3 in the flow direction of the chemical solution. As shown in FIG. 8, the pressure regulating valve 4 includes a pressure regulating valve inlet pipe 41 that introduces a chemical liquid pumped from the main body of the pump 3, a pressure regulating valve outlet pipe 42 that sends the chemical liquid to the nozzle, and a surplus chemical liquid. And a spill pipe 43 that returns to the chemical tank 2. The pressure regulating valve inlet pipe 41, the pressure regulating valve outlet pipe 42, and the spill pipe 43 project outward from the casing 44 of the pressure regulating valve 4, respectively, and have a cylindrical shape that communicates the inside and outside of the casing 44.

  As shown in FIG. 11, a pump outlet pipe 32 is inserted into the pressure regulating valve inlet pipe 41. Specifically, the pressure regulating valve inlet pipe 41 includes a first part 41a including an inlet into which the pump outlet pipe 32 is inserted, a second part 41b in which the tip of the pump outlet pipe 32 is disposed, and a second part. Between the first portion 41 a and the second portion 41 b in the axial direction of the pressure regulating valve inlet pipe 41, the third portion 41 c that is located behind the portion 41 b and the tip surface of the pump outlet pipe 32 contacts. And a fourth portion 41d on which the O-ring R is disposed.

  The first portion 41a has an inner diameter larger than the inner diameter of the second portion 41b, the inner diameter of the third portion 41c, and the inner diameter of the fourth portion 41d. As shown in FIG. 12, the first portion 41a is formed along the axial direction of the pressure regulating valve inlet pipe 41 from the inlet, and the first slit S1 that communicates the inside and the outside of the first portion 41a, and the first A second slit S2 formed on both sides sandwiching the first slit S1 from the end of the slit S1 along the circumferential direction of the pressure regulating valve inlet pipe 41, and communicating between the inside and the outside of the first portion 41a; Is included.

  As shown in FIG. 11, a cylindrical elastic body E is disposed between the first portion 41 a and the pump outlet pipe 32 in the radial direction of the pressure regulating valve inlet pipe 41. The elastic body E is disposed across both sides of the second slit S2 in the axial direction of the pressure regulating valve inlet pipe 41, and the end thereof is in contact with the step surface of the fourth portion 41d. The elastic body E is formed of a material softer than the material forming the casing 44. Specifically, the casing 44 is made of, for example, nylon, and the elastic body E is made of, for example, nitrile butadiene rubber.

  The first portion 41a includes plate-like tightening portions 41e and 41f that protrude outward in the radial direction from both edges along the axial direction forming the first slit S1. The fastening portions 41e and 41f are separated from each other in the circumferential direction of the pressure regulating valve inlet pipe 41 and fastened to each other by a tapping screw N (see FIG. 12). The inner diameter of the first portion 41a is variable by adjusting the tightening amount of the tapping screw N, and the elastic body E is adjusted by the first portion 41a by adjusting the inner diameter of the first portion 41a. In addition to being tightened, the outer peripheral surface of the pump outlet pipe 32 is tightened. With such a configuration, the pump outlet pipe 32 and the pressure regulating valve inlet pipe 41 are connected to each other without lengthening the flow path, and are fixed to each other.

  The second portion 41b has an inner diameter that is larger than the inner diameter of the third portion 41c and smaller than the inner diameter of the fourth portion 41d, and the tip of the pump outlet pipe 32 is fitted therein. The third portion 41 c has an inner diameter that is smaller than the outer diameter of the tip of the pump outlet pipe 32. A piping (not shown) for sending the chemical solution to the nozzle is connected to the pressure regulating valve outlet pipe 42.

  As shown in FIGS. 7 and 8, the spill pipe 43 protrudes in the same direction (forward) as the above-described pump inlet pipe 31 in a state where the pressure regulating valve 4 is fixed to the chemical liquid tank 2. The spillage pipe 43 is inserted into the spillage port 27b from the second through hole P2 opened at the tip of the spillage port 27b of the lid 27. The spillage port 27b and the spillage pipe 43 are fixed to each other by tightening a band B3 that is extrapolated to the outer peripheral surface of the spillage port 27b. Thereby, the pressure regulation valve 4 is attached to the chemical | medical solution tank 2 without lengthening a flow path. As shown in FIG. 11, a valve seat 45 for allowing excess chemical solution to escape from the flow path connecting the pressure regulating valve inlet pipe 41 and the pressure regulating valve outlet pipe 42 to the residual water pipe 43 is provided inside the pressure regulating valve 4. A valve body 46 and a spring 47 are arranged. The motor 5 is fixed to the main body of the pump 3.

  In the backpack type power sprayer 1 as described above, the chemical liquid in the chemical liquid tank 2 passes through the main body of the pump 3 and the pressure regulating valve 4 due to the pressure of the pump 3 and is sprayed from the nozzle.

  In particular, in the backpack type power sprayer 1, a lid 27 is fixed to the supply port 26 of the tank 2, and the pump 3 has a pump inlet pipe 31 that protrudes outward from a casing 33 of the pump 3 and is integrated with the lid 27. It is fixed to the tank 2 by being fixed to a water absorption port 27a provided in the tank. For this reason, in addition to the pump inlet pipe 31 and the water absorption port 27a, a member for connecting or fixing the tank 2 and the pump 3 such as a clasp is not required, and the size can be reduced. In addition, the number of parts and the number of assembling steps can be reduced, and the manufacturing cost can be reduced. Furthermore, since the connection locations between the tank 2 and the pump 3 are concentrated on the lid 27, it is possible to easily check for liquid leakage and to facilitate management. In addition, since it is not necessary to provide a screw hole or the like for mounting the pump 3 in the tank 2, manufacturing can be facilitated.

  Moreover, since the lid | cover 27 is formed with the elastic body, the vibration which generate | occur | produces with the pump 3 can be absorbed with the lid | cover 27, and a noise etc. can be suppressed.

  Further, the pressure regulating valve 4 is fixed to the tank 2 by fixing a spill pipe 43 protruding outward from the casing 44 of the pressure regulating valve 4 to a sewage port 27 b provided integrally with the lid 27. . Thus, since the pump 3 is fixed to the tank 2 by fixing the spill pipe 43 and the sewage port 27b in addition to fixing the pump inlet pipe 31 and the water absorption port 27a, the pump 3 and the tank 2 The fixing strength of the can be increased. Furthermore, since the connection locations between the tank 2 and the pressure regulating valve 4 are concentrated on the lid 27, it is possible to more easily check for liquid leakage and to further facilitate management.

  Further, since the lid 27 is provided with ribs 27c for reinforcing the water absorption port 27a and the excess water port 27b, the strength of the lid 27 can be improved.

  Moreover, since the main-body part of the pump 3 and the pressure regulation valve 4 are connected without passing through piping, size reduction and reduction of manufacturing cost can further be aimed at. Moreover, since the connection part of the main-body part of the pump 3 and the pressure regulation valve 4 is collected in one place, a liquid leak etc. can be confirmed further easily and management can be further facilitated.

  Further, the first through-hole P1 and the second through-hole P2 of the lid 27 respectively protrude from the end face of the lid 27 in the same direction (rearward with the lid 27 attached to the supply pipe 26). Since the pump inlet pipe 31 and the spillage pipe 43 are inserted into the ports 27a and the spillage port 27b, the water suction port 27a and the pump inlet pipe 31 are assembled, and the spillage port 27b and the spillage pipe 43 are inserted. Assembling with can be performed at the same time. Therefore, assembly can be performed suitably.

  As mentioned above, although this invention was concretely demonstrated based on the embodiment, this invention is not limited to the said embodiment. For example, in the said embodiment, although the spreading | diffusion apparatus is the backpack type power sprayer 1 which sprays a chemical | medical solution, the apparatus which spreads other liquids may be sufficient.

DESCRIPTION OF SYMBOLS 1 ... Back type power sprayer (spreading device), 2 ... Chemical tank, 3 ... Pump, 4 ... Pressure regulating valve, 26 ... Tank supply port, 27 ... Cover, 27c ... Rib, 31 ... Pump inlet pipe, 33 ... Pump , Spillage pipe, 44, pressure regulating valve casing, P 1, first through hole, P 2, second through hole.

Claims (5)

A spraying device (1) for spraying liquid,
A tank (2) for storing the liquid;
A pump (3) for pumping to spray the liquid in the tank (2),
The tank (2) has a supply port (26) for supplying the liquid to the pump (3),
A connection body (27) connected to the supply port (26) is fixed to the supply port (26),
The pump (3) has a pump inlet pipe (31) that protrudes outward from the casing (33) of the pump (3) and sucks the liquid from the tank (2), and the pump inlet pipe (31 ) is, by being fixed to a water port provided integrally (27a) to said connecting member (27), said pump (3) is fixed to said tank (2), spraying device (1).   The spraying device (1) according to claim 1, wherein the connecting body (27) is formed of an elastic body.   The spraying device (1) according to claim 2, wherein the pump (3) is provided with a motor (5). The pump (3) includes a pressure regulating valve (4) for controlling the pressure of the liquid,
The pressure regulating valve (4) has a spill pipe (43) that protrudes outward from the casing (44) of the pressure regulating valve (4) and returns the excess liquid to the tank (2). (43) is being fixed to the said tank (2) by being fixed to the sewage port (27b) integrally provided in the said connection body (27), Any one of Claims 1-3 The spraying device (1) according to item.   The sprinkling device according to claim 4, wherein the connection body (27) is provided with a rib (27c) for reinforcing at least one of the water absorption port (27a) and the remaining water port (27b). 1).

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