JPH078042Y2 - Electric backpack type power sprayer - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an electric backpack type power sprayer in which a pump, a motor and a battery are installed on the back-carrying surface side of a blow-molded chemical tank.

[Conventional technology]

Conventionally, as seen in Japanese Patent Application No. 1-87746 filed by the present applicant, the structure is such that a pump motor and a battery are hermetically enclosed in a blow-molded chemical tank.

[Problems to be solved by the device]

This type of motor has a high temperature of 70 degrees during use, so if it is in a sealed state inside the chemical tank as in the conventional type, the motor will remain hot and seizure will occur, causing problems. The problem was that it was easier to do.

[Means for Solving the Problems]

The present invention solves such a problem and enables the heat generating motor to be cooled better by the outside air.
Therefore, a recess that can be closed by a backrest is formed on the back-carrying surface side of the blow-molded chemical tank, and a pump, a motor, and a battery that communicate with the inside of the tank and the spray hose side are installed inside the recess, and the recess is formed. At the location, at least two open passages are provided which are opened laterally or laterally and laterally downward of the medicine tank and through which the motor can be ventilated.

[Action]

Therefore, when carrying out the spraying work while carrying the airframe on the back of the machine, the motor that drives the pump heats up and becomes hot, but it is possible to cool the motor while allowing the outside air to flow through the open passage and into the recess without being disturbed by the operator. become.

〔Example〕

 Next, an embodiment shown in the drawings will be described.

(A) is a drug tank, the cap (9) is fitted on the drug tank (A) is formed by blow molding a synthetic resin material, the back inside the drug tank (A) Recess (2) that opens to the surface side and the outer peripheral surface becomes the inner peripheral surface of the tank
Support pieces (10) that form the and are fixed to the upper part of the carrying surface
The bent portions at both ends of the mountain-shaped hook (11) are rotatably fitted into the hook (10), and the lower portions of both shoulder straps (12) and (12) connected to the hook (11) are supported on the shoulder surface. It is constructed by connecting to both mounting holes (13) (13) on both lower sides of the.

Further, the back support (1) that can be joined to the opening side of the recess (2) to close it is detachably fixed to the lower side of the back support surface via the screws (14) at the four corners. On the inner surface of the backrest (1), there are reinforcing plates (16) which can be engaged at both ends with vertical step portions (15a) (15b) formed on both sides of the opening of the recess (2). It is constructed by joining and fixing.

The battery (6) to be inserted into the recess (2) is fixed to the upper side of the battery (6) through the cushion member (17) and fixed by the support fitting (18). A suction hose having a strainer (19) at its tip is fixed to a side portion in the place (2) by a supporting metal fitting (not shown) which fixes a motor (5) which is vertically connected to a lower portion by directly connecting a pump (4). (20) is connected to the lower side of the pump (4) so as to communicate therewith, and a return hose (22) extending into the tank from a connector (21) lateral to the pump (4) and a spray. A spray hose (3) communicating with the pipe is extended, and a connector (23) for charging and a switch (24) of the motor (5) are attached to the lower lateral side of the drug tank (A). Constitute.

The switch (24) may be arranged on the handle portion of the spray hose (3).

In addition, the recess (2) is opened laterally or laterally and downwardly of the medicine tank (A), and the motor (5) is opened.
At least two open passages (7) that can be ventilated are formed, but the open passages (7) of the embodiment open from the upper inside of the recess (2) to the left and right sides of the drug tank (A), respectively. It is composed of both lateral open passages (7a) (7b) and a vertical open passage (7c) that opens from the lower part inside the recess (2) to the lower side of the drug tank (A), and is not disturbed by the operator. In this way, outside air can enter and exit through each open passage.

Therefore, the pump (4) and the battery (6) can be housed in the recess (2) so that the pump (4) and the battery (6) can be carried on the back without getting wet and can be made compact.

When a worker carries out the control work by carrying the aircraft on his back, the motor (5) for driving the pump (4) heats up to a high temperature. Especially, it is easy for the outside air to enter from the open passage on the windward side. The outside air can flow through the open passages (7a), (7b), (7c) and flow in the recess (2) to cool the motor (5) without being disturbed by the operator.

The open passage (7) is limited to both open passages (7a) and (7b), or only two open passages (7a) and (7b) and the lower open passage (7c). Can be configured as follows.

[Effect of device]

Thus, according to the present invention, the pump (4), the motor (5), and the battery (6) can be installed in the medicine tank (A) in a compact structure without being wet by rain and easily carried on the back. Therefore, even if the motor (5) becomes hot during work, the outside air is circulated in the recess (2) through at least two open passages (7) so as not to be disturbed by a worker carrying the body of the motor. Since (5) can be satisfactorily cooled, it is possible to effectively carry out the control work without causing the trouble such as the seizure of the motor as in the conventional case, and the open passage (7) can be easily formed during blow molding. It has a feature that it can be formed favorably with a simple structure.

[Brief description of drawings]

FIG. 1 is a sectional view taken along the line I--I of FIG. 8, showing a main part of an embodiment of the present invention, FIG. 2 is an overall rear view, FIG. 3 is a side view thereof, and FIG. The figure is a rear view with the backrest removed, FIG. 5 is a front view of the backrest, FIG. 6 is a plan view thereof, FIG. 7 is a side view thereof, and FIG. 8 is a side sectional view of an essential part.
FIG. 9 shows the same side sectional view. (A) ... Medicine tank, (1) ... Back support (2) ... Recesses (2), (3) ... Spraying hose (4) ... Pump, (5) ... Motor (6) ... … Battery, (7) …… Open passage

Claims (1)

[Scope of utility model registration request] 1. A blow molded drug tank (A) is provided with a recess (2) which can be closed by a back support (1) on the back-carrying surface side, and in the recess (2) the inside of the tank and spray are sprayed. A pump (4) communicating with the hose (3) side, a motor (5) and a battery (6) are internally provided, and the recess (2) is provided.
The electric type is characterized in that it is provided with at least two open passages (7) that are opened laterally or laterally and downwardly of the drug tank (A) and allow the motor (5) to be ventilated. A backpack type power sprayer.