JP2020033969A - Air compressor - Google Patents

Abstract

To satisfy a requirement that it is preferable that a stationary-type air compressor should be enabled in the supply of compressed air to an external air tool by being operated in only a state that the compressor is installed on a floor, a working table or the like, and also it is preferable that the compressor should be disenabled in the supply of the compressed air from a view point of the necessity for preventing an unintentional operation of the external air tool when the compressor is in transport or the like, and not in an installation state, and to prevent the unintentional operation of the connected external air tool when the DC-type and stationary-type air compressor is in the transport or the like, and not in the installation state.SOLUTION: An air compressor comprises installation detection means 40 for detecting an installation state or a non-installation state of the air compressor 1 with respect to an installation face F. In the non-installation state of the air compressor 1, the push-in of a plunger 44b is stopped due to the separation of a displacement end 41b and a detection part 44a, and a switch 44 detects the non-installation state. When the non-installation state is detected, a function as the air compressor 1 is stopped.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an air compressor for supplying compressed air to tools such as a compressed air driven nail driver and an air tacker, and is a stationary air compressor which is used by being installed on an installation surface such as a floor or a work table. Related to compressors.

  The air compressor described in Patent Document 1 is a DC-type air compressor that uses a rechargeable battery as a power source. The air compressor includes an electric motor, a crank connected to a motor shaft of the electric motor, and a piston connected to the crank and reciprocally movable in a cylinder. Electric power is supplied from a battery to an electric motor, and the electric motor generates compressed air by reciprocating a piston in a cylinder via a crank. The generated compressed air is supplied to tools such as a compressed air driven nail driver and an air tacker. In recent years, due to improvements in the performance of batteries and electric motors, DC-type and stationary air compressors that store compressed air in tanks and are used by being installed on an installation surface such as a floor or a work table have been provided.

JP 2012-112282 A

  It is desirable that the stationary air compressor described above is operated only in a state where the air compressor is installed on a floor or a workbench or the like so that compressed air can be supplied to an external air tool. It is desirable to prevent compressed air from being supplied because it is necessary to prevent inadvertent operation of an external air tool.

  SUMMARY OF THE INVENTION An object of the present invention is to prevent a careless operation of a connected external air tool in a DC-type and stationary-type air compressor when it is carried or the like and is not in an installed state.

  A first invention is a stationary air compressor that supplies compressed air generated by being operated on an installation surface to an external air tool. The first invention includes an electric motor that is a drive source of a compressed air generation unit that generates compressed air, and an installation detection unit that detects an installation state or a non-installation state of the air compressor with respect to the installation surface. In the first invention, the electric motor is supplied with power from a rechargeable battery. In the first invention, when the installation detecting means detects the non-installation state, the function as the air compressor is stopped. Here, the function as an air compressor includes a power supply function from a battery to an electric motor, a compressed air generating function in a compressed air generating unit driven by an electric motor, a function of storing generated compressed air, and a function of generating compressed air. It includes a series of functions from the supply of power to the supply of compressed air to the external air tool, such as the function of supplying compressed air to an external air tool.A part or one of these functions is performed. By stopping, the function as the air compressor can be stopped.

  According to the first invention, when the air compressor is not installed, such as when the user is carrying the air compressor, by stopping the function as the air compressor, careless operation or connection of the compressed air generation unit is prevented. Inadvertent operation of the external air tool is prevented.

  According to a second invention, in the first invention, when the installation detecting means detects the non-installation state, the power supply to the electric motor is cut off to stop the operation of the compressed air generation unit.

  According to the second aspect, the power supply to the electric motor is cut off and the compressed air generation unit is stopped, so that the function as the air compressor is stopped.

  A third invention is an air compressor including a tank for storing compressed air generated by a compressed air generator in the first or second invention. In the third invention, when the installation detecting means detects the non-installation state, the compressed air in the tank is released to the atmosphere.

  According to the third aspect, the function as the air compressor is stopped by releasing the compressed air in the tank to the atmosphere.

  A fourth invention is the air compressor according to any one of the first to third inventions, further comprising a notifying unit for notifying the user of the non-installation state when the installation detection unit detects the non-installation state. .

  According to the fourth invention, it is possible to easily inform the user whether the air compressor can or cannot function. Further, according to the fourth aspect, the user can easily confirm the installation state of the air compressor.

  A fifth invention is the air compressor according to any one of the first to fourth inventions, wherein the air compressor is provided with a handle serving as a grip portion when the user carries it. In the fifth invention, the installation detecting means detects the state of the force applied to the steering wheel to determine the installation state and the non-installation state.

  According to the fifth aspect, in particular, the state of the force applied to the handle gripped when the air compressor is carried by the user (the presence or absence of the force applied to the handle) is detected to determine the installed state or the non-installed state of the air compressor. I do. Thus, the installed state or the non-installed state can be detected relatively accurately.

  A sixth invention is the air compressor according to the fifth invention, wherein the air compressor is provided with a handle, which is a grip portion when carried by a user. In the sixth invention, the installation detecting means detects the displacement of the handle.

  According to the sixth aspect, the displacement of the handle indicating the change in the state of the force applied to the handle is detected by the installation detection unit. Thus, the installed state or the non-installed state can be relatively accurately detected with a simpler configuration.

  A seventh invention is the air compressor according to the sixth invention, wherein one end of the handle is supported so as to be vertically tiltable, and the other end is vertically displaceable. In the seventh invention, the installation detecting means detects the vertical displacement of the other end.

  According to the seventh aspect, the holding section can include the installation detection unit while maintaining the strength for supporting the air compressor. Further, according to the seventh aspect, it is possible to detect the air compressor as being in the non-installed state including the middle stage of lifting and the middle stage of lowering the air compressor on the installation surface.

  An eighth invention is the air compressor according to the seventh invention, wherein a shoulder belt can be attached to at least the other end of the handle. In the eighth invention, the installation detecting means detects a vertical displacement of the other end caused by the user carrying with the shoulder belt.

  According to the eighth aspect, even when the air compressor is carried using the shoulder belt, the installation detecting means provided on the handle can be operated as it is.

  A ninth invention is the air compressor according to any one of the first to eighth inventions, further comprising a power control unit that controls an on / off state of power supply from a battery. In the ninth invention, when the installation detecting unit detects the non-installation state, the power supply control unit turns off the power supply.

  According to the ninth aspect, when the power is not supplied to the power supply control unit in the non-installation state, the generation of the compressed air in the compressed air generation unit 20 is stopped. Therefore, the function as the air compressor 1 is stopped.

  A tenth invention is the air compressor according to any one of the first to ninth inventions, wherein the installation detection means includes a detection member at a position facing the installation surface. In the tenth aspect, when the detection member is close to the installation surface at a certain distance or less, the installation state is detected, and when the detection member is separated from the installation surface by a certain distance or more, Detect non-installation state. The case where the detection member is close to the installation surface at a distance equal to or less than a certain distance includes, for example, the case where the detection member is in contact with the installation surface.

  According to the tenth aspect, the installation state or the non-installation state is determined based on the distance between the detection member and the installation surface.

1 is an overall perspective view of an air compressor according to the present invention. It is the perspective view which removed the housing of the air compressor which concerns on 1st Embodiment. FIG. 2 is a right side view in a mounted state of the air compressor according to the first embodiment, and is a partial longitudinal sectional view. FIG. 4 is an enlarged view of a portion IV in FIG. 3. FIG. 2 is a right side view of the air compressor according to the first embodiment in a transport state, and is a partial vertical cross-sectional view. FIG. 6 is an enlarged view of a portion VI in FIG. 5. It is the perspective view which removed the housing of the air compressor which concerns on 2nd Embodiment. FIG. 6 is a right side view in a mounted state of an air compressor according to a second embodiment, and is a partial longitudinal sectional view. It is a front view in a mounting state of an air compressor concerning a 2nd embodiment, and is a partial longitudinal section. It is a right view in the conveyance state of the air compressor which concerns on 2nd Embodiment, Comprising: It is a one part longitudinal cross-sectional view. It is a front view in the conveyance state of the air compressor which concerns on 2nd Embodiment, and is a partial longitudinal cross-sectional view.

  Next, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 to 3, the stationary air compressor 1 includes a housing 2 that covers the whole, and a horizontally long tank 4 that can store compressed air. On the lower surface side of the tank 4, legs 3 are provided at both ends in the longitudinal direction of the tank 4, and a total of four legs 3 are provided. When the air compressor 1 is installed on an installation surface F such as a floor or a work table, the air compressor is supported by four legs 3. Above the tank 4, a discharge port 34 communicating with the tank 4 is provided. An air hose can be connected to the discharge port 34. Compressed air can be supplied from the tank 4 to a tool driven by compressed air, such as a nailer, via the connected air hose. In the following description, the vertical direction is defined by the posture in which the air compressor 1 is installed with the leg 3 down. The front, rear, left, and right directions are defined with the ejection port 34 as the front side, with reference to the user as viewed from the front side.

  As shown in FIGS. 2 and 3, the air compressor 1 includes a compressed air generation unit 20 above the tank 4. The compressed air generator 20 includes an electric motor 16 as a drive source and a piston 24 for compressing the intake air. The electric motor 16 is housed in the motor housing 15 with the motor shaft 16a extending forward. A drive gear 16b and a cooling fan 16c are integrally mounted on the motor shaft 16a. A driven gear 18b of the reduction unit 18 housed in the gear housing 17 meshes with the drive gear 16b. The driven gear 18b is provided integrally with the output shaft 18a rotatably supported by the gear housing 17. The front part of the output shaft 18a enters the crank housing 21, and a crank disk 22 is attached to the front part. The crank disk 22 is provided with a crank shaft 22a that is eccentric with respect to the output shaft 18a. A base end of a crank rod 23 is supported on the crank shaft 22a so as to be relatively rotatable. A piston 24 is attached to the tip of the crank rod 23. A cylinder 25 extending vertically is hermetically attached to an upper portion of the crank housing 21. The piston 24 is supported so as to reciprocate in a cylinder 25 in an airtight manner. The upper piston chamber above the cylinder 25 communicates with the ventilation pipe 26. The ventilation pipe 26 communicates with the inside of the tank 4.

  When the electric motor 16 starts, the rotational output of the electric motor 16 is reduced by the engagement of the driving gear 16b and the driven gear 18b. The reduced rotation output rotates the crank disk 22 via the output shaft 18a. When the crank disk 22 rotates, the crankshaft 22a revolves around the output shaft 18a. Thereby, the crank rod 23 moves up and down, and the piston 24 reciprocates up and down inside the cylinder 25. External air is supplied to the upper chamber of the cylinder 25 by the reciprocating motion of the piston 24 to generate compressed air. The generated compressed air is supplied into the tank 4 through the ventilation pipe 26.

  As shown in FIGS. 2 and 3, a compressed air supply unit 30 is provided at the front of the air compressor 1. The compressed air supply unit 30 includes a pressure adjustment unit 31, a pressure adjustment dial 32, a meter 33, and a discharge port. The pressure adjustment dial 32 and the meter 33 are exposed at the top. The pressure adjustment dial 32 is supported so that a user can rotate the pressure adjustment dial 32. The discharge port 34 protrudes forward from the front end of the housing 2. The pressure adjusting unit 31 is provided in the middle of a path where the inside of the tank 4 and the discharge port 34 communicate with each other. When the pressure adjustment dial 32 is rotated, the pressure adjustment unit 31 can reduce the pressure of the compressed air in the tank 4 and supply the compressed air to the discharge port 34. The pressure of the compressed air reduced by the pressure adjusting unit 31 is displayed on the meter 33.

  As shown in FIGS. 2 and 3, a battery mounting portion 12 to which a battery 13 for supplying power to the electric motor 16 can be attached and detached is provided at a rear portion of the air compressor 1. The battery 13 can be used repeatedly by removing it from the battery mounting part 12 and charging it with a separately prepared charger. The battery 13 can be re-used as a power source with other rechargeable power tools such as screwdrivers and electric drills. The power supply from the battery 13 attached to the battery attachment unit 12 to the electric motor 16 is controlled by the power supply control unit 10 and the controller 14.

  As shown in FIGS. 1 and 2, the power supply control unit 10 controls power supply from the battery 13 to various electric components such as the electric motor 16, the controller 14, and an electromagnetic valve 51 described later. The power control unit 10 includes a push button 11 that can be pressed from outside the housing 2. By pressing and operating the push button 11 when the power supply from the battery 13 is in the off state, the power supply is switched to the on state. By pressing and operating the push button 11 when the power supply from the battery 13 is on, the power supply is switched to the off state.

  As shown in FIGS. 2 and 3, a controller 14 is housed in the air compressor 1. The controller 14 is covered with a shallow box-shaped rectangular case. The controller 14 mainly has a control circuit and a power supply circuit for controlling the operation of the electric motor 16. The controller 14 is arranged beside the cooling fan 16c. When the motor shaft 16a rotates, the cooling fan 16c rotates, and cooling air is generated. The cooling air cools the controller 14 located downstream of the cooling fan 16c while cooling the electric motor.

  As shown in FIGS. 2 and 3, a pressure sensor 5 is provided on a side of the tank 4. The pressure sensor 5 detects whether the pressure in the tank 4 has reached the set pressure and is in a full state or less than the set pressure. When detecting that the pressure in the tank 4 has reached the set pressure, the controller 14 stops the electric motor 16. When detecting that the pressure in the tank 4 is lower than the set pressure, the controller 14 sets the electric motor 16 in a startable state or continues the start state.

  As shown in FIGS. 1 and 2, a drain cock 6 and a drain outlet 6 a are provided in a lower portion of the tank 4. The drain outlet 6a communicates with the inside of the tank 4 and opens slightly downward. The drain cock 6 opens and closes the drain outlet 6a by rotating. When using the air compressor 1, use it with the drain cock 6 closed. When the drain cock 6 is opened, the drain and compressed air accumulated in the tank 4 are discharged from the drain outlet 6a according to the opening amount.

  As shown in FIGS. 2 and 3, a compressed air discharging means 50 is provided at the front of the tank 4. The compressed air discharging means 50 includes an electromagnetic valve 51 and a discharge pipe 52. The discharge pipe 52 communicates with the inside of the tank 4 via the electromagnetic valve 51. The electromagnetic valve 51 is electrically connected to the battery 13 and the controller 14, and opens and closes with electric power supplied from the battery 13 under the control of the controller 14. When the electromagnetic valve 51 is closed, the compressed air in the tank 4 is not discharged from the discharge pipe 52. When the electromagnetic valve 51 is open, the compressed air in the tank 4 is discharged from the discharge pipe 52.

  As shown in FIGS. 1 and 2, a handle 41 is provided above the air compressor 1. The handle 41 has a loop shape projecting upward from the upper surface of the housing 2. The handle 41 is a grip when the user carries the air compressor 1. A shaft hole 41a penetrating in the left-right direction is provided at a front portion of the handle 41. A support shaft 42 is inserted into the shaft hole 41a. Both ends of the support shaft 42 project to the left and right of the handle 41, respectively. The rear lower end of the handle 41 is provided as a displacement end 41b. The displacement end 41b is provided with a substantially elliptical vertically long shaft hole 41c that penetrates in the left-right direction and extends in the up-down direction. The support shaft 43 is inserted into the vertically long shaft hole 41c. Both ends of the support shaft 43 project to the left and right of the handle 41, respectively. The handle 41 is supported on the housing 2 by a support shaft 42 and a support shaft 43.

  As shown in FIGS. 2, 3, and 5, one belt mounting portion 41e is provided on each of the front portion and the rear portion of the handle 41. The belt attaching portion 41e has a concave portion that opens upward, and a column portion that extends in the left-right direction in the concave portion and whose both ends are supported by the handle 41. As shown in FIGS. 3 and 5, a shoulder belt 46 having, for example, annular portions at both ends can be attached to the belt attaching portion 41e. The user can carry the air compressor 1 by hanging the shoulder belt 46 on the shoulder in a state where the shoulder belt 46 is attached to the pair of front and rear belt attachment portions 41e.

  As shown in FIGS. 4 and 6, the support shaft 43 can change its position up and down with respect to the displacement end 41b along the vertically long shaft hole 41c. The support shaft 43 is supported by the housing 2 so as not to be displaced. Therefore, the displacement end 41b is displaced up and down with respect to the housing 2. FIG. 4 shows a state where the displacement end 41b is located at the lower end position. FIG. 6 shows a state where the displacement end 41b is located at the upper end position. As shown in FIGS. 3 and 5, when the displacement end 41b is displaced up and down, the handle 41 rotates around the support shaft.

  As shown in FIGS. 3 to 6, a switch 44 (limit switch) is provided below the displacement end 41b. The installation detecting means 40 mainly includes a displacement end 41b and a switch 44. A spring holding portion 41d protrudes from the rear end of the displacement end 41b. A compression spring 45 is held between the upper surface of the spring holding portion 41d and the lower surface of the upper end of the housing 2. The compression spring 45 urges the displacement end 41b having the spring holding portion 41d downward. As shown in FIGS. 3 and 4, when the air compressor 1 is installed on the installation surface F, the displacement end 41b is biased by the compression spring 45 and is located at the lower end position. As shown in FIGS. 5 and 6, when the user is carrying the air compressor 1 by gripping the handle 41 or hanging a shoulder belt 46 attached to the belt attaching portion 41 e on the shoulder, the displacement end 41 b is compressed. Displaced upward from the lower end position against the urging force of the spring 45.

  Above the switch 44, a plate-shaped detection unit 44a is provided. The detection unit 44a is supported rotatably with respect to the switch 44 about the front end. A plunger 44b is provided below the rear part of the detection unit 44a. The plunger 44b can be pushed downward, and the pushed portion is urged upward. As shown in FIG. 4, when the displacement end 41b is located at the lower end position, the detection unit 44a contacts the lower surface of the displacement end 41b and pushes the plunger 44b downward. When the plunger 44b is pushed, the switch 44 detects the ON state. As shown in FIG. 6, when the displacement end 41b is located above the lower end position, the detection unit 44a stops pushing the plunger 44b to separate from the lower surface of the displacement end 41b. When the plunger 44b is not depressed, the switch 44 detects an off state.

  Therefore, as shown in FIG. 3, when the air compressor 1 is installed on the installation surface F, the switch 44 detects the installation state (ON state). As shown in FIG. 5, when the user is carrying the air compressor 1 by gripping the handle 41 or hanging the shoulder belt 46 attached to the belt attaching portion 41e on the shoulder, the switch 44 is in the non-installed state ( Off state). The air compressor 1 includes one or more components that stop the function as the air compressor 1 when the switch 44 detects the OFF state. Here, the function as the air compressor 1 includes a function of supplying power from the battery 13 to the electric motor 16 via the power control unit 10, a function of the controller 14 controlling the electric motor 16, and a function of driving the electric motor 16. The function of generating compressed air in the compressed air generating unit 20, the function of storing the generated compressed air in the tank 4, and the function of storing the compressed air stored in the tank 4 to an external air tool via the compressed air supply unit 30 It includes a series of functions from supply of power from the battery 13 to supply of compressed air to an external pneumatic tool, such as a supply function of sending, and by stopping a part or one of these functions, The function as the air compressor 1 can be stopped.

  One of the configurations for stopping the function as the air compressor 1 is a configuration for stopping the rotation of the electric motor 16. The switch 44 shown in FIG. 5 is electrically connected to the controller 14 shown in FIG. When the switch 44 detects the OFF state, the controller 14 stops the electric motor 16. Thus, the vertical reciprocation of the piston 24 is stopped, and the generation of compressed air in the compressed air generation unit 20 is stopped.

  One configuration in which the function as the air compressor 1 is stopped is a configuration in which power supply from the battery 13 to the electric motor 16 is cut off. The switch 44 shown in FIG. 5 is electrically connected to the power control unit 10 and the controller 14 shown in FIG. When the switch 44 detects the OFF state, the supply state of the power control unit 10 is switched to the OFF state while the power supply from the battery 13 to the electric motor 16 is shut off. Thereby, the rotation of the electric motor 16 and the vertical reciprocation of the piston 24 are stopped, and the generation of compressed air in the compressed air generation unit 20 is stopped. When the air compressor 1 is again placed on the installation surface F, the supply state of the power control unit 10 is maintained in the off state. Therefore, careless generation of compressed air by the compressed air generation unit 20 when the air compressor 1 in the non-installed state is placed on the installation surface F again is stopped. In this case, generation of the compressed air is restarted by depressing the push button 11 again to restart the compressed air generation unit 20.

  One of the configurations for stopping the function as the air compressor 1 is to open the electromagnetic valve 51 and discharge the compressed air in the tank 4 from the discharge pipe 52 to the atmosphere. The electromagnetic valve 51 shown in FIG. 5 is electrically connected to the battery 13 and the controller 14 shown in FIG. When the switch 44 detects the OFF state, power is supplied from the battery 13 to the electromagnetic valve 51, and the electromagnetic valve 51 opens. When the switch 44 detects the ON state, the power supply from the battery 13 to the electromagnetic valve 51 is stopped, and the electromagnetic valve 51 is closed. Thus, in the non-installed state, the compressed air in the tank 4 is released to the atmosphere from the discharge pipe 52 without being supplied to the compressed air supply unit 30.

  The user is notified of the non-installation state of the air compressor 1 by the notification means 55, and that the function as the air compressor 1 is stopped. As shown in FIG. 5, the notification means 55 is, for example, a buzzer provided inside the controller 14. When the switch 44 detects the OFF state, a sound is generated from the notification unit 55. Thereby, it is possible to inform the user that the air compressor 1 is in the non-installation state where it is separated from the installation surface F and that the function as the air compressor 1 is stopped.

  According to the air compressor 1 described above, the user lifts or carries the air compressor 1 from the installation surface F by gripping the handle 41 or hanging the shoulder belt 46 attached to the belt attachment portion 41e on the shoulder. In this case, the switch 44 detects that the air compressor 1 is not installed on the non-installed surface F. When the switch 44 detects the non-installation state (off state), the function as the air compressor 1 is stopped. This prevents inadvertent operation of the compressed air generation unit 20 and the compressed air supply unit 30 and inadvertent operation of a connected external air tool.

  According to the air compressor 1, when the switch 44 detects the non-installation state, the controller 14 stops the rotation of the electric motor 16. Thus, the vertical reciprocation of the piston 24 is stopped, and the generation of compressed air in the compressed air generation unit 20 is stopped. Therefore, the function as the air compressor 1 is stopped.

  Further, according to the air compressor 1, when the switch 44 detects the non-installation state, the power supply from the battery 13 to the electric motor 16 is cut off. Thus, the rotation of the motor shaft 16a and the vertical reciprocation of the piston 24 are stopped, and the generation of compressed air in the compressed air generation unit 20 is stopped. Therefore, the function as the air compressor 1 is stopped.

  According to the air compressor 1, when the switch 44 detects the non-installation state, power is supplied from the battery 13 to the electromagnetic valve 51 under the control of the controller 14, and the electromagnetic valve 51 is opened. Thereby, the compressed air in the tank 4 is released to the atmosphere from the discharge pipe 52. Therefore, the function as the air compressor 1 is stopped.

  According to the air compressor 1, when the switch 44 detects the non-installation state, the notifying unit 55 notifies the user of the non-installation state. The notification unit 55 is, for example, a buzzer, and generates a sound to notify the user of the non-installation state. Thereby, it is possible to easily inform the user whether the air compressor 1 can or cannot function. The user can easily check the installation state of the air compressor 1.

  Further, according to the compressor 1, the installation detecting means 40 detects the state of the force applied to the handle 41 gripped when the air compressor 1 is carried by the user (the presence or absence of the force applied to the handle 41). The installation state or non-installation state of the compressor 1 is determined. Therefore, the installed state or the non-installed state is determined from the state of the force for gripping the handle 41 and the force applied to the handle 41 from the shoulder belt 46 attached to the belt attachment portion 41e. Thus, the installed state or the non-installed state can be detected relatively accurately.

  Further, according to the air compressor 1, the switch 44 detects the installed state or the non-installed state of the air compressor 1 by detecting the displacement of the displacement end 41b of the handle 41 indicating the change in the state of the force applied to the handle 41. I do. Therefore, since the installed state or the non-installed state of the air compressor 1 can be determined based on the mechanical action, it is possible to relatively accurately detect the air compressor 1 with a simpler configuration.

  Further, according to the air compressor 1, the handle 41 is supported by the support shaft 42 at the front part so as to be tiltable in the vertical direction, and the rear end is provided with the displacement end 41b. The switch 44 detects the installed state or the non-installed state of the air compressor 1 by detecting the vertical displacement of the displacement end 41b. Therefore, the handle 41 can be provided with the installation detecting means 40 while maintaining the strength for supporting the air compressor 1. In addition, when the displacement end 41b is located above the lower end position, that is, when the air compressor 1 is being lifted or lowered on the installation surface, it can be detected as a non-installed state.

  Further, according to the air compressor 1, even when the shoulder belt 46 is attached to the pair of front and rear belt attachment portions 41e, and the air compressor 1 is carried by hanging the shoulder belt 46 on the shoulder, the installation provided on the handle 41 is also provided. The detection means 40 can function as it is.

  Further, according to the air compressor 1, when the switch 44 detects the non-installation state, the power supply state from the battery 13 by the power supply control unit 10 is switched to the off state. Thereby, the rotation of the electric motor 16 and the vertical reciprocation of the piston 24 are stopped, and the generation of compressed air in the compressed air generation unit 20 is stopped. Therefore, the function as the air compressor 1 is stopped. When the air compressor 1 is changed from the non-installed state to the installed state again, the power supply control unit 10 remains off. Therefore, the careless generation of compressed air by the compressed air generation unit 20 when the air compressor 1 in the non-installed state is placed in the installed state again is suppressed.

  Next, a second embodiment of the present invention will be described with reference to FIGS. The stationary air compressor 60 according to the second embodiment includes a housing 61, a handle 62, and an installation detecting unit 65 instead of the housing 2, the handle 41, and the installation detecting unit 40 of the air compressor 1 according to the first embodiment. . The installation detection means 65 is provided at the bottom of the housing 61. The handle 62 is supported by the housing 2 via the support shaft 42 and the support shaft 43 so as not to be displaced without having a configuration that rotates in the vertical direction. Each of the front and rear portions of the handle 62 is provided with one belt mounting portion 62a to which the shoulder belt 46 shown in FIG. 3 can be mounted.

  As shown in FIGS. 7 to 9, a detection member 66 is provided at substantially the center of the bottom of the housing 61 so as to protrude downward. The detection member 66 includes a substantially cylindrical shaft portion 66b extending in the vertical direction, and a contact portion 66c provided below the shaft portion 66b and having a substantially horizontal lower surface. The shaft 66b penetrates the bottom of the housing 61 so as to be movable in the vertical direction. A rod-shaped retaining member 69 penetrates the shaft portion 66b in a posture extending in the left-right direction. Both ends of the retaining member 69 project to the left and right of the shaft portion 66b. The retaining member 69 is inserted into the shaft 66b inside the housing 61 (upper side of the bottom). Therefore, as shown in FIGS. 10 and 11, the retaining member 69 restricts the shaft 66 b from falling off the bottom of the housing 61.

  As shown in FIG. 9, a groove-shaped spring holding portion 61 a that is opened downward is provided around a portion of the bottom of the housing 61 where the shaft portion 66 b is inserted. A groove-shaped spring holding portion 66a that is open upward is provided on the upper surface of the contact portion 66c. A compression spring 68 is mounted between the spring holding part 61a and the spring holding part 66a. The detection member 66 is urged downward with respect to the housing 61 by a compression spring 68.

  As shown in FIGS. 8 and 9, when the air compressor 60 is installed on the installation surface F, the detecting member 66 makes contact with the lower surface of the abutting portion and the installation surface F (a certain amount or less with respect to the installation surface F). (Close to the distance), it is located at the upper end position against the urging force of the compression spring 68. As shown in FIGS. 10 and 11, when the user grips the handle 62 or hangs the shoulder belt attached to the belt attaching portion 62 a on the shoulder and lifts the air compressor 60 from the installation surface F, the detection member 66 becomes , Is located at the lower end position where it is urged by the compression spring 68 and is prevented from falling off by the retaining member 69.

  As shown in FIG. 8, a switch 67 (limit switch) is provided behind the shaft 66b. The switch 67 is fixed to the housing 61, for example. The installation detecting means 65 is mainly constituted by a detecting member 66 and a switch 67. At the front of the switch 67, there is provided a plate-shaped detection portion 67a that can contact the shaft portion 66b. The detection unit 67a is supported rotatably with respect to the switch 67 about the lower end. A plunger 67b is provided on the upper rear side of the detection unit 67a. The plunger 67b can be pushed backward, and the pushed portion is urged forward. As shown in FIG. 8, when the detecting member 66 is located at the upper end position, the detecting portion 67a comes into contact with the shaft portion 66b and pushes the plunger 67b backward. When the plunger 67b is pushed, the switch 67 detects the ON state. As shown in FIG. 10, when the detecting member 66 is located below the upper end position, the detecting portion 67a stops pushing the plunger 67b to separate from the shaft portion 66b. When the plunger 67b is not pushed, the switch 67 detects an off state.

  Therefore, as shown in FIG. 8, when the air compressor 60 is installed on the installation surface F, the switch 67 detects the installation state (ON state). As shown in FIG. 10, when the user grips the handle 62 or hangs the shoulder belt attached to the belt attaching portion 62 a on the shoulder to lift the air compressor 60 from the installation surface F or carry the air compressor 60, the switch 67. Detects a non-installation state (off state). The air compressor 60 has one or more components that stop the function as the air compressor 60 when the switch 67 detects the OFF state. The function as the air compressor 60 includes, similarly to the function as the air compressor 1 according to the first embodiment, a series of functions from receiving power supply from the battery 13 to supplying compressed air to an external air tool. The function as the air compressor 60 can be stopped by stopping some or one of these functions. The configuration for stopping the function as the air compressor 60 is the same as the configuration provided in the air compressor 1 according to the first embodiment.

  According to the air compressor 60 described above, the displacement generated by the contact and separation of the detection member 66 with the installation surface F is detected by the switch 67, and the installation state (ON state) or the non-installation state (OFF state) is determined. Is made. When the switch 67 detects the non-installation state (OFF state), the function as the air compressor 60 is stopped. This prevents inadvertent operation of the compressed air generation unit 20 and the compressed air supply unit 30 and inadvertent operation of a connected external air tool.

  Various changes can be made to the air compressors 1 and 60 of the first and second embodiments described above. For example, a plurality of configurations for stopping the functions of the air compressors 1 and 60 described above can be used alone or in appropriate combination. Instead of the detachable battery 13 and the battery mounting part 12, a built-in battery may be provided. Instead of the installation detecting means 40 for detecting the displacement of the displacement end 41 c of the handle 41, for example, a pressure sensor is provided on the inner lower surface of the handle 41 and an installation detecting means for detecting that a gripping force is applied to the handle 40 is provided. It may be configured. The arrangement location of the installation detecting means is not limited to the illustrated location, but may be a configuration including the installation detecting means at the front end of the handle 41, for example. Instead of the rotary handle 41, for example, the entire handle 41 may be displaceable substantially in parallel to the housing 2. Instead of the integrally formed handle 41, for example, a configuration may be provided in which a portion to be gripped by a user is provided with an installation detection unit using a handle formed in a vertically divided structure. The installation detecting means detects the non-installed state by, for example, the lower grip approaching the upper grip (displaced upward) during lifting.

  Instead of the compressed air discharging means 50 having the electromagnetic valve 51, a compressed air discharging means that opens the valve by mechanically transmitting the displacement of the displacement end 41b or the detecting member 66 may be used. Alternatively, instead of the compressed air discharging means 50, for example, the detection member 66 itself has a role of a valve for sealing the tank 4 in the installed state, and releases the compressed air in the tank 4 in the non-installed state. You may. The notifying unit 55 may be, for example, a light source for visually notifying, instead of a buzzer or the like for notifying by sound.

  Instead of the installation detection means 65 for detecting the displacement of the detection member 66, for example, a pressure sensor is disposed on the lower surface of the contact portion 66c of the detection member 66, and the pressure sensor is disposed on the lower surface of the contact portion 66c by being installed on the installation surface F. It is good also as a structure provided with the installation detection means which detects the applied pressure. In place of the installation detection means 65 for detecting that the installation portion 66c of the detection member 66 is in contact with the installation surface F, for example, a configuration including installation detection means for detecting the distance between the lower surface of the housing 2 and the installation surface F Is also good. In the installation detecting means, for example, the installation state is detected by detecting that the lower surface of the housing 2 is close to a predetermined distance or less from the installation surface F, and the lower surface of the housing 2 is not less than a predetermined distance from the installation surface F. The non-installation state is detected by detecting the separation at a distance.

1. Air compressor (first embodiment)
2 ... Housing 3 ... Leg 4 ... Tank 5 ... Pressure sensor 6 ... Drain cock, 6a ... Drain outlet 10 ... Power control unit 11 ... Push button 12 ... Battery mounting unit 13 ... Battery 14 ... Controller 15 ... Motor housing 16 ... Electric motor 16a Motor shaft 16b Drive gear 16c Cooling fan 17 Gear housing 18 Reduction unit 18a Output shaft 18b Drive gear 20 Compressed air generator 21 Crank housing 22 Crank disk , 22a ... crankshaft 23 ... crank rod 24 ... piston 25 ... cylinder 26 ... ventilation pipe 30 ... compressed air supply unit 31 ... pressure adjustment unit 32 ... pressure adjustment dial 33 ... meter 34 ... discharge port 40 ... installation detecting means 41 ... handle 41a: Shaft hole, 41b: Displacement end, 41c: Longitudinal shaft hole 41d: Spring holder, 41e ... Part 42 ... Support shaft 43 ... Support shaft 44 ... Switch, 44a ... Detector, 44b ... Plunger 45 ... Compression spring 46 ... Shoulder belt 50 ... Compressed air discharge means 51 ... Electromagnetic valve 52 ... Discharge pipe 55 ... Information means 60 ... Air Compressor (second embodiment)
Reference numeral 61: housing, 61a: spring holder 62: handle, 62a: belt mounting part 65: installation detecting means 66: detecting member, 66a: spring holder, shaft part: 66b, contact part: 66c
67 ... Switch, 67a ... Detector, 67b ... Plunger 68 ... Compression spring 69 ... Retaining member F ... Installation surface

Claims (10)

A stationary air compressor that supplies compressed air generated by operating in a state where it is installed on an installation surface to an external air tool,
An electric motor that is a drive source of a compressed air generation unit that generates compressed air, and an installation detection unit that detects an installation state or a non-installation state of the air compressor with respect to an installation surface,
The electric motor is supplied with power from a rechargeable battery,
An air compressor configured to stop functioning as the air compressor when the installation detection unit detects the non-installation state. The air compressor according to claim 1, wherein
An air compressor having a configuration in which when the installation detection unit detects the non-installation state, power supply to the electric motor is shut off to stop the operation of the compressed air generation unit. The air compressor according to claim 1 or 2,
It has a tank for storing the compressed air generated by the compressed air generating unit,
An air compressor that discharges compressed air in the tank to the atmosphere when the installation detection unit detects the non-installation state. The air compressor according to any one of claims 1 to 3,
An air compressor including an informing means for informing the user of the non-installation state when the installation detection means detects the non-installation state. An air compressor according to any one of claims 1 to 4, wherein
There is a handle that is a grip part when the user carries it,
The air compressor, wherein the installation detecting means detects a state of a force applied to the handle to determine the installation state and the non-installation state. The air compressor according to claim 5, wherein
The installation detector is an air compressor that detects displacement of the handle. The air compressor according to claim 6, wherein
One end of the handle is supported so as to be tiltable in the vertical direction, and the other end is displaceable in the vertical direction,
The installation compressor is an air compressor that detects vertical displacement of the other end. The air compressor according to claim 7, wherein
A shoulder belt can be attached to at least the other end of the handle,
The installation compressor is an air compressor that detects vertical displacement of the other end caused by a user carrying the shoulder belt. An air compressor according to any one of claims 1 to 8,
A power control unit that controls an on / off state of power supply from the battery,
An air compressor configured to turn off the power supply when the installation detection unit detects the non-installation state; An air compressor according to any one of claims 1 to 9,
The installation detection means includes a detection member at a position facing the installation surface,
When the detection member is close to a fixed distance or less with respect to the installation surface, the installation state is detected, and when the detection member is separated from the installation surface by a certain distance or more, the non-installation state is detected. Air compressor that detects the condition.

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