Spraying machine

The present invention relates to a sprayer such as a backpack type sprayer or a portable sprayer that can be moved by a small trolley or the like.

Conventionally, the one described in Patent Document 1 is known as an example of a sprayer that performs work while carrying it on its back. This sprayer is a battery-powered power sprayer, and is equipped with a chemical solution tank for storing chemical solutions such as pesticides. In the recess formed on the back surface of the chemical solution tank, a pump that sucks the chemical solution in the chemical solution tank and pumps it to the spray nozzle, an electric motor for driving the pump, and a battery that supplies electric power to the electric motor are provided. Have been placed.

The left and right width dimensions of the chemical solution tank are larger than the front and rear thickness dimensions, and a drain port for discharging the chemical solution in the chemical solution tank is provided at the lower part of the side surface of the chemical solution tank. The drain port is provided in this way in order to discharge and collect the chemical solution remaining in the chemical solution tank after the spraying work is completed.

<p><patcit num="1"><text>Japanese Unexamined Patent Publication No. 2004-68911</text></patcit></p>

<p> By the way, when the chemical solution remaining in the chemical solution tank is discharged from the drain port after the spraying work is completed, the chemical solution tank may be tilted with respect to the horizontal plane. In this case, the lower end edge of the side surface of the chemical solution tank is placed on the mounting surface (ground, upper surface of the workbench, etc.) on which the chemical solution tank is placed, and then the lower end edge of the side surface of the chemical solution tank is used as a fulcrum. As a result, the sides are tilted toward you. Such a chemical discharge operation is an unstable operation because the lower end edge of the side surface of the chemical solution tank receives the full load of the sprayer, but the lower end edge of the side surface is short. On the other hand, if the thickness dimension of the front and back of the chemical solution tank is increased, the length of the part that receives the full load of the sprayer, that is, the lower end edge of the side surface becomes longer, so that the chemical solution can be discharged stably to some extent. When the sprayer is a backpack type or the like, the center of gravity of the sprayer is separated from the body of the person carrying the sprayer, so it is not preferable to increase the thickness dimension in the front and back.</p><p> The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sprayer capable of stably discharging a chemical solution.</p>

<p> In order to achieve the above object, the sprayer of the present invention is a sprayer having a chemical solution tank (1). The left and right width dimensions of the chemical solution tank (1) are larger than the front and rear thickness dimensions. A drain port (10) for discharging the chemical solution in the chemical solution tank (1) is provided in the center of the lower part of the front surface (2) of the chemical solution tank (1).</p><p> In the present invention, in the chemical discharge operation, the lower end edge of the front surface of the chemical liquid tank is placed on a mounting surface (ground, upper surface of a workbench, etc.) on which the chemical liquid tank is placed, and then the chemical liquid tank is discharged. Since the front end is tilted toward you with the lower end edge of the front surface as the fulcrum, the entire load of the sprayer is received at the lower end edge of the front surface of the chemical solution tank. Since the lower end edge of the front surface of the chemical tank is longer than the lower end edge of the side surface, the discharge work is stable and constant as compared with the conventional case where the lower end edge of the side surface receives the full load. In addition, since the movement of the center of gravity when the chemical solution tank is tilted is small, the discharge work is stable in this respect as well.</p><p> In the configuration of the present invention, the lower end of the chemical tank (1) is provided on the pedestal (15). The left and right width dimensions of the pedestal portion (15) are substantially equal to the width dimensions of the chemical solution tank (1). The pedestal portion (15) is provided with two convex portions (15a, 15a) separated from each other on the front side thereof. It is preferable that the concave portion (15b) between the two convex portions (15a, 15a) is located below the drain port (10).</p><p> According to such a configuration, when discharging the chemical solution, the pedestal portion is placed on the mounting surface (ground, upper surface of the workbench, etc.) on which the pedestal portion is placed, and then the pedestal portion is placed. As a fulcrum, the front of the chemical solution tank is tilted toward you, but at this time, the full load of the sprayer is received by the two convex parts of the pedestal, so the discharge work becomes more stable. Further, since the concave portion between the two convex portions is located below the drain port, it is easy to receive the chemical solution discharged from the drain port from below, and the discharge workability is improved. Further, since the two convex portions are provided on the pedestal portion that is substantially equal to the width dimension of the chemical liquid tank, the distance between the convex portions can be widened. Therefore, in this respect as well, the discharge work is stable.</p><p> Further, in the configuration of the present invention, it is preferable that the recess (12) is provided in the lower part of the back surface (6) of the chemical solution tank (1).</p><p> According to such a configuration, since the recess is provided in the lower part of the back surface of the chemical solution tank, the volume in the chemical solution tank is smaller in the lower part than in the upper part. Therefore, even if the amount of the remaining chemical solution is small, the chemical solution can be easily discharged from the drain port during the discharge operation. Further, a pump, an electric motor for driving the pump, a battery for supplying electric power to the electric motor, and the like can be accommodated in a recess at the lower part of the back surface of the chemical solution tank.</p>

<p> According to the present invention, the work of discharging the chemical solution can be stably performed.</p>

<figref num="1">An example of the sprayer according to the present invention is shown, where (a) is a perspective view, (b) is a front view, and (c) is a bottom view.</figref><figref num="2">The same is a perspective view showing a state in which the sprayer is tilted during the chemical discharge operation.</figref><figref num="3">The same is a perspective view of the chemical solution tank.</figref><figref num="4">The same is a side view of the chemical solution tank.</figref>

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an example of a sprayer according to the present embodiment, (a) is a perspective view, (b) is a front view, and (c) is a bottom view.

The sprayer according to the present embodiment is a battery-powered power sprayer, and includes a chemical solution tank 1 for storing chemical solutions such as pesticides. The chemical tank 1 is made of synthetic resin, and as shown in FIGS. 1, 3 and 4, it has a vertically long substantially rectangular shape when viewed from the front. The front surface 2 of the chemical tank 1 is composed of a front upper portion 2a and a front lower portion 2b, and the boundary portion between the front upper portion 2a and the front lower portion 2b projects forward (to the right in FIG. 4). That is, the upper front portion 2a and the lower front portion 2b are inclined in the opposite direction to the vertical plane with the boundary portion in between. Further, a drain port 10 for discharging the chemical solution in the chemical solution tank 1 is provided in the lower center of the front surface of the chemical solution tank 1, that is, the central portion of the lower end edge of the lower front lower portion 2b, and the drain cap 10 is provided with a drain cap 10. 11 is detachably attached.

The side surface 3 of the chemical tank 1 is composed of an upper side surface 3a and a lower side surface 3b, and these upper side surface 3a and the lower side surface 3b form a continuous flat surface. The edge along the back side of the lower side surface 3b is recessed in a substantially arc shape toward the front side 2. As a result, the chemical solution tank 1 has a shape that tapers toward the bottom when viewed from the side. A handle 3c is provided at the upper end of the upper side surface 3a.

The upper surface 4 of the chemical solution tank 1 is composed of a gentle arc surface, and a filling port for filling the chemical solution tank 1 is formed in the central portion thereof, and a lid 7 is detachably attached to this filling port. Has been done. A handle 7a is fixed to the lid 7. Further, the upper surface 4 and the side surface 3 of the chemical tank 1 are continuous by a smooth arc surface. The bottom surface 5 of the chemical solution tank 1 is composed of a substantially semi-cylindrical surface that is long in the left-right width direction of the chemical solution tank 1, and is smoothly connected to the front surface 2 and the back surface 6.

The back surface 6 of the chemical solution tank 1 is composed of an upper back surface 6a and a lower back surface 6b, and the lower rear surface 6b is recessed in a substantially arcuate shape toward the front surface 2 side, whereby the chemical solution tank 1 of the chemical solution tank 1 is formed. A recess 12 is provided at the bottom of the back surface 6. The recess 12 is provided with a chemical liquid supply device 13 having a pump that sucks the chemical liquid in the chemical liquid tank 1 and pumps it to the spray nozzle, an electric motor for driving the pump, a battery that supplies electric power to the electric motor, and the like. Has been done.

The left and right width dimensions of the chemical solution tank 1 having the above configuration are larger than the front and rear thickness dimensions. That is, the width dimension of the front surface 2 and the back surface 6 of the chemical solution tank 1 is larger than the width dimension of the side surface 3. Further, the lower end of the chemical solution tank 1 is provided on the pedestal portion 15, and the left and right width dimensions of the pedestal portion 15 are substantially equal to the left and right width dimensions of the chemical solution tank 1. The pedestal portion 15 is provided with two convex portions 15a and 15a separated from each other on the front side thereof, and the concave portion 15b between the two convex portions 15a and 15a is located below the drain port 10. There is.

The convex portion 15a protrudes from the end portion of the pedestal portion 15 toward the central portion in a substantially arcuate surface shape, and the boundary portion with the concave portion 15b protrudes most forward. Further, the recess 15b is recessed in a substantially arcuate surface shape, and the portion directly below the drain port 10 is the most recessed. The left and right widths of the recess 15b are sufficiently larger than the diameter of the drain port 10, and the depth is almost equal to the length of the drain port 10.

In the sprayer having the above configuration, when the chemical solution remaining in the chemical solution tank 1 is discharged from the drain port 10 after the spraying work is completed, first, the pedestal portion 15 is placed on a mounting surface such as the ground or the upper surface of the workbench. After placing it, remove the drain cap 11 from the drain port 10. Next, as shown in FIG. 2, the front surface 2 of the chemical solution tank 1 is tilted toward you with the pedestal portion 15 as a fulcrum, and the entire sprayer is tilted to discharge the chemical solution from the drain port 10. On the other hand, a container such as a bucket is arranged in the recess 15b of the pedestal portion 15, and the chemical solution discharged from the drain port 10 is received and collected in the container.

In this way, the chemical discharge work is performed by tilting the front surface 2 of the chemical liquid tank 1 toward you with the pedestal portion 15 as a fulcrum. At this time, the sprayer is used at the two convex portions 15a and 15a of the pedestal portion 15. Since the center of gravity does not move much when the chemical tank 1 is tilted, the discharge work becomes more stable. Further, since the recess 15b of the pedestal portion 15 is located below the drain port 10, it is easy to receive the chemical solution discharged from the drain port 10 from below, and the discharge workability is improved. Further, since the two convex portions 15a and 15a are provided on the pedestal portion 15 which is substantially equal to the width dimension of the chemical liquid tank 1, the distance between the convex portions 15a and 15a can be widened. Therefore, in this respect as well, the discharge work is stable. Further, since the recess 12 is provided in the lower part of the back surface 6 of the chemical solution tank 1, the volume of the inside of the chemical solution tank 1 is smaller in the lower part than in the upper part. Therefore, even if the amount of the remaining chemical solution is small, the chemical solution can be easily discharged from the drain port 10 during the discharge operation. Further, the chemical solution supply device 13 such as a pump, an electric motor, and a battery can be accommodated in the recess 12 at the lower part of the back surface 6 of the chemical solution tank 1.

In the present embodiment, the pedestal portion 15 is provided at the lower end portion of the chemical solution tank 1, but the pedestal portion 15 may not be provided. In this case, in the chemical discharge operation, the lower end edge of the front surface of the chemical liquid tank 1 is placed on the mounting surface (ground, upper surface of the workbench, etc.) on which the chemical liquid tank 1 is placed, and then the chemical liquid tank 1 is discharged. The front may be tilted toward you with the lower end edge of the front of 1 as a fulcrum. As a result, the lower edge of the front of the chemical tank 1 receives the full load of the sprayer, but the lower edge of the front of the chemical tank 1 is longer than the lower edge of the side surface, so it is stable. It will be a discharge work.

1 Chemical tank 2 front 3 sides 6 back 10 drain mouth 12 recesses 15 pedestal 15a convex part 15b recess