JP7795101B2 - Work equipment - Google Patents

Description

The present invention relates to a work machine.

The dust collection device (work machine) described in Patent Document 1 below comprises a dust collector (main body) and a dust bag (dust collection unit) attached to the dust collector. The dust collector has a fan case with an inlet and an outlet, and a motor and fan are housed in the fan case. When the fan is operated by the motor, an airflow is generated that flows from the inlet to the outlet. This allows dust generated during cutting processes, for example, to be sucked into the fan case through a hose connected to the inlet, and then discharged from the outlet into the dust bag, where it is collected.

Japanese Patent Application Publication No. 11-9515

After the dust collection operation is completed, the hose is removed from the dust collector and the dust collection device is stored. At this time, there is a possibility that dust remaining inside the fan case will be discharged outside the fan case through the suction port. In this case, the dust that has been discharged outside the fan case must be collected and disposed of by the worker again. This could result in reduced workability.

In consideration of the above, the present invention aims to provide a work machine that can improve workability.

One or more embodiments of the present invention are a work machine comprising: a main body portion having an air intake port and an exhaust port; a dust collection portion attached to the main body portion and into which the air flow exhausted from the exhaust port flows; and a battery attachment portion to which a battery is attached , wherein the main body portion comprises: a drive unit supplied with power from the battery; a fan that is operated by the driving force of the drive unit and generates the air flow from the air intake port to the exhaust port; a housing that accommodates the drive unit and the fan and has the air intake port and the exhaust port; a hinge portion provided on the housing and constituting a base end; and a cap body connected to the hinge portion, and a movable cap portion configured to be switchable by operation by an operator between an open state in which the air intake port is open and a closed state in which the cap body closes the air intake port.

One or more embodiments of the present invention are a work machine in which a hose that serves as a passageway for the air flow into the air intake is attached to the air intake, the main body is configured to be able to be placed on the ground, the cap body extends downward from the air intake when in the open state and has a grounding portion at its tip , and when the main body is placed on the ground and the movable cap is in the open state, the grounding portion comes into contact with the ground, thereby enabling charged static electricity to be discharged via the movable cap .
In one or more embodiments of the present invention, the cap body is made of a conductive material and is flexible.

One or more embodiments of the present invention relate to a work machine having a cap including a tubular mounting portion, one end of which is attached to the housing and the other end of which the hose is attached, and the movable cap portion, and the extension length of the movable cap portion is longer than the vertical distance between the lower end of the main body portion and the tubular mounting portion.

One or more embodiments of the present invention are work machines in which the cap is constructed from a single member.

One or more embodiments of the present invention are work machines in which the movable cap portion is made of a material in which carbon is mixed with rubber.

One or more embodiments of the present invention are work machines in which the resistance value of the movable cap portion is set to 10^12 ohms or less.

In one or more embodiments of the present invention, the movable cap portion is configured to include a disk-shaped cap body arranged between the hinge portion and the ground portion, and the plate-shaped ground portion that forms the tip of the movable cap portion, and the width dimensions of the hinge portion and the ground portion are smaller than the diameter of the cap body.

One or more embodiments of the present invention are directed to a work machine in which the inner circumferential surface of the hose is made of a conductive material.
One or more embodiments of the present invention include a main body having an air intake port and an exhaust port, and a dust collection unit attached to the main body and into which airflow exhausted from the exhaust port flows, the main body including a drive unit, a fan that is actuated by a driving force of the drive unit and generates the airflow from the air intake port to the exhaust port, a housing that houses the drive unit and the fan and has the air intake port and the exhaust port, and a dust collection unit that is provided in the housing and is switchable between an open state that opens the air intake port and a closed state that closes the air intake port. a movable cap portion attached to the intake port, a hose that serves as a passage for the air flow into the intake port, the main body portion configured to be able to be placed on the ground, the movable cap portion extending downward from the intake port when in the open state, having a grounding portion at its tip and having a cap body that can close the intake port, and when the main body portion is placed on the ground and the movable cap portion is in the open state, the grounding portion comes into contact with the ground, thereby enabling charged static electricity to be discharged via the movable cap portion.

A work machine with the above configuration can improve workability.

1 is a front view showing a dust collecting device according to an embodiment of the present invention; 2 is a cross-sectional view seen from the right side showing a state in which a hose is attached to an intake pipe of the dust collector of the dust collecting device shown in FIG. 1 . FIG. 2 is a perspective view of the dust collector of the dust collecting device shown in FIG. 1, viewed obliquely from above on the right. FIG. FIG. 4 is a partially cutaway front view of the dust collector shown in FIG. 3 as seen from the front side. FIG. 4 is a cross-sectional view showing the inside of the dust collector shown in FIG. 3 as viewed from the right side. 4 is a partially cutaway plan view of the dust collector shown in FIG. 3 as seen from above. FIG. FIG. 4 is a rear view of the dust collector shown in FIG. 3 as seen from the rear side. FIG. 4 is a front view showing the cap of the dust collector shown in FIG. 3 . FIG. 9 is a cross-sectional view of a modified example of the cap shown in FIG. 8 .

The following describes the dust collecting device 1 as a work machine according to this embodiment, using the drawings. Note that the arrows UP, FR, and LH shown as appropriate in the drawings indicate the top, front, and left sides of the dust collecting device 1, respectively. In the following description, when the terms up/down, front/rear, and left/right are used, they refer to the up/down, front/rear, and left/right directions of the dust collecting device 1, unless otherwise specified.

As shown in FIG. 1, the dust collector 1 includes a dust collector 10 as the main body and a dust bag 70 as a dust collection unit attached to the dust collector 10. The dust collector 1 is connected to a cutting machine such as a circular saw by a hose 60 (see FIG. 2) attached to the dust collector 10, for example, and collects dust generated during cutting in the dust bag 70. As shown in FIGS. 3 to 7, the dust collector 10 includes a housing 12, a motor 30 and a fan 38 as a drive unit housed in the housing 12, a battery 22 as a power supply unit that supplies power to the motor 30, and a cap 50 and a hose 60 attached to the housing 12. Each component of the dust collector 10 will be described below.

(Regarding the housing 12)
The housing 12 forms the outer shell of the dust collector 10. The housing 12 is formed in a generally rectangular box shape overall. The housing 12 is made up of multiple housing members that are assembled together. The housing 12 includes a fan housing portion 12A that forms the front end of the housing 12, and a motor housing portion 12B (broadly speaking, an element that can be understood as a drive housing portion) that forms the rear end of the housing 12. The motor housing portion 12B is an example of a drive portion housing portion, and the fan housing portion 12A is an example of a fan housing portion.

The fan housing section 12A has a thickness extending in the front-to-rear direction and is formed in a generally circular shape when viewed from the front. The interior of the fan housing section 12A is configured as a volute chamber 12C for accommodating the fan 38, which will be described later. The volute chamber 12C and the interior of the motor housing section 12B are separated by a partition wall 12D, and a communication hole 12E is formed through the partition wall 12D, connecting the fan housing section 12A and the motor housing section 12B.

An intake pipe 12F serving as an intake section is integrally formed with the fan housing section 12A. The intake pipe 12F is formed in a generally cylindrical shape with its axial direction aligned in the front-to-rear direction and extends forward from approximately the center of the front wall of the fan housing section 12A. As a result, the intake port 12F1, which is the tip opening of the intake pipe 12F, is open to the front, connecting the interior of the intake pipe 12F to the volute chamber 12C. An engagement groove 12F2 is formed on the outer periphery of the tip side of the intake pipe 12F, which engages with the cap 50, described below. The engagement groove 12F2 is formed in a concave shape that opens radially outward from the intake pipe 12F, extends circumferentially around the intake pipe 12F, and is formed around the entire circumference of the intake pipe 12F.

An exhaust pipe 12G serving as an exhaust section is integrally formed with the fan housing section 12A. The exhaust pipe 12G is formed in a generally cylindrical shape with its axis extending in the left-right direction and extends to the left from the upper end of the fan housing section 12A. As a result, the exhaust port 12G1, which is the tip opening of the exhaust pipe 12G, is open to the left, connecting the interior of the exhaust pipe 12G to the volute chamber 12C. A dust bag 70 is attached to the exhaust pipe 12G and is positioned on the left side of the dust collector 10. The dust bag 70 is a flexible bag with a filter or the like inside, and collects dust discharged from the exhaust pipe 12G in the dust bag 70. The dust bag 70 may also be made of hard resin and shaped like a generally rectangular box.

The motor housing portion 12B is formed in a generally rectangular box shape. The vertical dimension of the motor housing portion 12B is smaller than that of the fan housing portion 12A, and the left-right dimension of the motor housing portion 12B is generally the same as that of the fan housing portion 12A. Specifically, the upper end of the motor housing portion 12B is located below the upper end of the fan housing portion 12A, and the lower end of the motor housing portion 12B is located above the lower end of the fan housing portion 12A. That is, an upper step portion 12H is formed at the upper end of the housing 12, rearward of the fan housing portion 12A, and is one step lower than the upper end of the fan housing portion 12A. A lower step portion 12J is formed at the lower end of the housing 12, rearward of the fan housing portion 12A, and is one step higher than the lower end of the fan housing portion 12A. A motor cover portion 12K protruding rearward is provided on the rear wall of the motor housing portion 12B, approximately in the center in the left-right direction. The motor cover portion 12K is formed in a generally cylindrical shape with a bottom that opens to the front.

A battery mounting section 12L (see Figures 5 and 7) is provided at the lower end of the motor housing section 12B. The battery mounting section 12L is formed in a generally U-shape that opens to the rear when viewed from below. A battery terminal 20 (see Figures 5 and 7) is provided in the battery mounting section 12L, and the battery terminal 20 is electrically connected to the controller 36 (described below). A battery 22 serving as a power source is removably attached to the battery mounting section 12L. Specifically, the battery 22 slides from the rear to the front of the battery mounting section 12L to be attached to the battery mounting section 12L. The battery 22 has a connector (not shown) that connects to the battery terminal 20, and power is supplied from the battery 22 to the controller 36 and the motor 30. When the battery 22 is attached, it is positioned below the motor housing section 12B, with the upper part of the battery 22 positioned within the lower step section 12J. That is, the upper part of the battery 22's vertical placement range overlaps with the vertical placement range of the fan housing section 12A. In other words, the upper part of the battery 22 overlaps with the lower end of the fan housing section 12A in a front view. Alternatively, the coordinates at which the battery 22 is positioned in the vertical direction partially overlap with the coordinates at which the fan housing section 12A is positioned in the vertical direction. Furthermore, the lower part of the battery 22 is positioned so that it protrudes downward from the housing 12 (fan housing section 12A).

A frame portion 14 forms the lower side of the housing 12. The frame portion 14 is formed integrally with the motor housing portion 12B. The frame portion 14 includes a frame main body portion 14A and a pair of left and right frame connecting portions 14B. In a plan view, the frame main body portion 14A is formed in a generally U-shape that is open to the rear. Specifically, the frame main body portion 14A includes a pair of left and right side frame portions 14A1 extending in the front-to-rear direction, and a front frame portion 14A2 that connects the front ends of the side frame portions 14A1. The side frame portions 14A1 are positioned on the left-to-right outer sides of the lower portion of the battery 22, and the front frame portion 14A2 is positioned in front of the lower portion of the battery 22. As a result, the frame main body portion 14A surrounds the lower portion of the battery 22 from both the left and right directions and the front.

The frame connecting portion 14B extends upward from the front-to-rear middle of the side frame portion 14A1 and is connected to both left and right sides of the motor housing portion 12B. A mounting portion 14C that protrudes downward is formed at both front-to-rear ends of the side frame portion 14A1. The mounting portion 14C is placed on the ground surface GR when the dust collector 1 is in dust collection operation. The mounting portion 14C is positioned below the battery 22. Therefore, when the mounting portion 14C is placed on the ground surface GR, the battery 22 is positioned above the ground surface GR. The rear end of the motor cover portion 12K, the rear end of the battery 22, and the rear end of the frame portion 14 are positioned so that they are substantially aligned in the front-to-rear direction.

A handle 16 is provided on the upper side of the motor housing portion 12B and is formed integrally with the motor housing portion 12B. That is, the handle 16 is disposed within the upper step portion 12H of the housing 12 and spaced apart from the rear of the fan housing portion 12A. When viewed from the rear, the handle 16 is formed in a generally inverted U shape that opens downward. Specifically, the handle 16 includes a pair of left and right handle connecting portions 16A extending upward from both left and right sides of the motor housing portion 12B, and a grip portion 16B extending laterally and connecting the upper ends of the handle connecting portions 16A. Thus, the grip portion 16B is spaced apart from the upper side of the motor housing portion 12B, and is grasped by the operator when transporting the dust collector 10, for example. The upper end of the handle 16 is located slightly above the upper end of the housing 12 (fan housing portion 12A), and most of the handle's vertical range overlaps with the upper end of the fan housing portion 12A. The entire left-right range of the battery 22 overlaps with the entire grip portion 16B of the handle 16 (see Figure 7). Furthermore, the handle 16 is positioned so that it is located approximately in the center of the battery 22 in the front-to-rear direction when viewed from the left-to-right direction.

An operation panel 18 for operating the dust collector 10 is provided in the middle of the longitudinal direction on the top surface of the grip portion 16B, and is configured to be operable by pressing downward. A switch mechanism (not shown) is provided below the operation panel 18 inside the grip portion 16B, and the switch mechanism has a switch (not shown) that operates when the operation panel 18 is operated. The switch is electrically connected to the controller 36, and when the operation panel 18 is operated, the switch outputs an ON signal to the controller 36.

(Regarding the motor 30)
The motor 30 is housed within the motor housing portion 12B. That is, the motor 30 is disposed above the battery 22 and below the handle 16. More specifically, the motor 30 is disposed in a position where its left-right range overlaps the entire grip portion 16B of the handle 16 (see FIG. 7 ). In other words, the grip portion 16B of the handle 16, the motor 30, and the battery 22 overlap in a plan view. The motor 30 has a drive shaft 30A whose axial direction is the front-to-rear direction. The rear end of the drive shaft 30A is rotatably supported by a bearing 32 held in the motor cover portion 12K, and the front end of the drive shaft 30A is rotatably supported by a bearing 34 held in the partition wall 12D. The drive shaft 30A is positioned approximately coaxially with the intake pipe 12F, and the front end of the drive shaft 30A is inserted through the communication hole 12E and disposed within the volute chamber 12C of the fan housing portion 12A. The motor 30 is electrically connected to a controller 36 (see FIG. 6 ), and is driven under the control of the controller 36. Specifically, when the motor 30 is driven, the drive shaft 30A rotates around its own axis in one direction (the direction of arrow A in FIG. 4 ). The controller 36 is housed in the motor housing portion 12B on the right side of the motor 30.

(About Fan 38)
The fan 38 is housed in the volute chamber 12C of the housing 12. The fan 38 is configured as a so-called centrifugal fan. Specifically, the fan 38 includes a fan base 38A and multiple impellers 38B. The fan base 38A is formed in a generally circular plate shape with its thickness extending in the front-to-rear direction. A mounting boss 38C is formed in the center of the fan base 38A. The mounting boss 38C is formed in a generally cylindrical shape and protrudes forward from the fan base 38A. The drive shaft 30A is inserted into the mounting boss 38C from the rear, and the mounting boss 38C is fixed to the drive shaft 30A by a fixing bolt 40. This connects the fan 38 to the drive shaft 30A so that the fan 38 can rotate integrally with the drive shaft 30A.

The impeller 38B extends radially outward from the mounting boss 38C of the fan base 38A and is formed in the shape of a plate with its thickness aligned with the circumferential direction of the fan base 38A. In other words, the impeller 38B protrudes forward from the fan base 38A. When viewed from the front, the impeller 38B inclines toward the other side of the rotation direction of the drive shaft 30A as it extends radially outward from the fan base 38A and is curved in a generally arc-like shape. Multiple impellers 38B are arranged side by side at predetermined angular intervals around the circumferential direction of the fan base 38A.

Fan 38 is also located below the connection portion of fan housing portion 12A with exhaust pipe 12G. When fan 38 rotates in one direction together with drive shaft 30A of motor 30, rotation of impeller 38B generates airflow AR (see Figure 4) that flows in one circumferential direction of fan 38. Specifically, airflow AR flows into volute chamber 12C from intake port 12F1 of intake pipe 12F, and the airflow AR that has flowed into volute chamber 12C is exhausted from exhaust port 12G1 of exhaust pipe 12G.

(Regarding the cap 50)
2 to 6 and 8, the cap 50 is attached to the intake pipe 12F of the housing 12 and serves as a lid for opening and closing the intake port 12F1. The cap 50 is made of a conductive and flexible material. In this embodiment, the cap 50 is made of conductive rubber (a rubber material (EPDM) mixed with a filler such as carbon black), and the resistance of the cap 50 is set to 10 ohms or less (preferably 10 ohms or less).

The cap 50 includes a mounting tube 52 that is attached to the intake pipe 12F of the housing 12, and a movable cap portion 54 that opens and closes the intake port 12F1 of the intake pipe 12F. The mounting tube 52 is formed in a generally cylindrical shape with its axial direction aligned in the front-to-rear direction. The front portion of the intake pipe 12F is fitted into the rear portion of the mounting tube 52 from the rear side, thereby attaching the mounting tube 52 to the intake pipe 12F. An engagement rib 52A is formed on the inner surface of the rear end of the mounting tube 52. The engagement rib 52A extends circumferentially around the mounting tube 52 and is formed around the entire circumference of the mounting tube 52. The engagement rib 52A is fitted into an engagement groove 12F2 of the intake pipe 12F, and the engagement rib 52A and the engagement groove 12F2 engage in the front-to-rear direction. This limits the movement of the mounting tube 52 in the front-to-rear direction. Additionally, a fixed-side engagement hook 52B that protrudes radially inward is formed on the inner peripheral surface of the front end of the mounting tube 52, and extends around the entire circumference of the mounting tube 52.

The movable cap portion 54 has a cap body 54B that is detachably attached to the front end of the mounting tube portion 52. The state of the cap 50 is changed by attaching or detaching the cap body 54B to or from the mounting tube portion 52. Specifically, by attaching the cap body 54B to the mounting tube portion 52, the cap 50 enters a closed state (the state shown in Figures 3 to 6) that closes the air intake port 12F1. By removing the cap body 54B from the mounting tube portion 52, the cap 50 enters an open state (the state shown in Figures 2 and 8) that opens the air intake port 12F1. The cap 50 is placed in the open state when the dust collector 10 is performing dust collection operations, and in the closed state when the dust collector 10 is being stored after the dust collection operation is completed. The configuration of the movable cap portion 54 will be described below using the cap 50 in the open state.

The movable cap portion 54 extends radially outward (more specifically, downward) from the front end of the mounting tube portion 52. The movable cap portion 54 is composed of a hinge portion 54A that forms the base end of the movable cap portion 54, a cap body 54B that forms the longitudinal middle portion of the movable cap portion 54, and a ground knob portion 54C that serves as a grounding portion that forms the tip end of the movable cap portion 54.

The hinge portion 54A is formed in a generally rectangular plate shape with its width direction in the left-right direction and its length direction in the up-down direction, and extends downward from the front end of the mounting tube portion 52. The cap body 54B is formed in a generally circular plate shape with its thickness direction in the front-to-back direction, and the lower end of the hinge portion 54A is connected to the outer periphery of the upper end of the cap body 54B. The outer diameter of the cap body 54B is generally the same as the outer diameter of the mounting tube portion 52 and is set larger than the width dimension of the hinge portion 54A. A fitting tube portion 54B1 is formed on the outer periphery of the cap body 54B. The fitting tube portion 54B1 is formed in a generally cylindrical shape with its axial direction in the front-to-back direction and protrudes to the front of the cap body 54B. A movable side engagement hook 54B2 protruding radially outward is formed at the tip of the fitting tube portion 54B1, and the movable side engagement hook 54B2 extends around the entire circumference of the fitting tube portion 54B1.

When the cap 50 is in the closed state, the hinge portion 54A is bent upward to form a roughly U-shape in side view, and the cap body 54B is inverted in the front-to-back direction and attached to the front end of the mounting tube portion 52, closing the opening of the mounting tube portion 52. Specifically, the cap body 54B is positioned adjacent to the front side of the mounting tube portion 52, and the mating tube portion 54B1 is fitted into the front end of the mounting tube portion 52. Furthermore, when the cap 50 is in the closed state, the movable side engagement hook 54B2 is positioned adjacent to the rear side of the fixed side engagement hook 52B, and the movable side engagement hook 54B2 and the fixed side engagement hook 52B are engaged in the front-to-back direction. This maintains the cap 50 in the closed state.

Like the hinge portion 54A, the ground knob portion 54C is formed in a generally rectangular plate shape with its width in the left-right direction and its length in the up-down direction, and extends downward from the outer periphery of the lower end of the cap body 54B. The width dimension of the ground knob portion 54C is set to be approximately the same as the width dimension of the hinge portion 54A. When the cap 50 is in the closed state, the ground knob portion 54C protrudes upward from the cap body 54B. This allows the operator to grasp the ground knob portion 54C and switch the cap 50 to its closed state.

Furthermore, the extension length L (see Figures 2 and 8) of the movable cap portion 54 is set to be longer than the vertical separation distance H (see Figure 5) between the mounting tube portion 52 and the lower end of the frame portion 14. Therefore, when the dust collector 10 is placed on the ground GR during dust collection operation, the grounding knob portion 54C of the movable cap portion 54 abuts against the ground GR, so that the cap 50 is grounded to the ground GR (see Figure 2). In other words, the cap 50 is configured to function as an earth member that is grounded to the ground GR.

(Regarding the hose 60)
2, the hose 60 is formed in a generally cylindrical shape with its axial direction extending in the front-to-rear direction. One end of the hose 60 is connected to a cutting machine (not shown), such as a circular saw. The other end of the hose 60 is fitted from the front into the mounting tubular portion 52 of the cap 50 when it is open, and is connected to the cap 50. As a result, airflow AR generated by the rotation of the fan 38 sucks dust generated during cutting from the intake pipe 12F into the volute chamber 12C and discharges it from the exhaust port 12G1 into the dust bag 70.

(Action and effect)
When performing dust collection using the dust collecting device 1 configured as described above, the cap body 54B is removed from the mounting tube 52 to open the cap 50. One end of the hose 60 is attached to a cutting machine such as a circular saw, and the other end of the hose 60 is attached to the mounting tube 52 of the cap 50. Furthermore, a dust bag 70 is attached to the exhaust pipe 12G.

When the operator operates the operation panel 18, the motor 30 is driven, causing the fan 38 to rotate in one direction around the drive shaft 30A. This causes airflow AR to flow from the intake port 12F1 of the intake pipe 12F into the volute chamber 12C. The airflow AR that has flowed into the volute chamber 12C flows circumferentially around the fan 38 as the fan 38 rotates, and is then flowed into the exhaust pipe 12G and blown out from the exhaust port 12G1 of the exhaust pipe 12G into the dust bag 70. This allows dust generated during cutting processes, etc., to be collected in the dust bag 70.

After the dust collection operation using the dust collector 1 is completed, the hose 60 is removed from the dust collector 10, and the dust collector 10 is disconnected from a cutting machine such as a circular saw. At this time, there is a possibility that dust remaining in the volute chamber 12C of the dust collector 10 will be discharged to the outside of the housing 12 through the air intake 12F1. If dust is discharged to the outside of the housing 12 through the air intake 12F1, the worker will need to collect and dispose of the discharged dust again, which reduces workability.

Here, a cap 50 is attached to the intake pipe 12F of the housing 12, and the cap 50 is configured to be switchable between an open state that opens the intake port 12F1 of the intake pipe 12F, and a closed state that closes the intake port 12F1. As a result, after the dust collection operation by the dust collector 1 is completed, the cap 50 is switched to the closed state and the intake port 12F1 is closed with the cap 50, thereby preventing dust remaining in the housing 12 (volute chamber 12C) from flowing out of the housing 12 through the intake port 12F1. This improves workability.

The cap 50 is made of conductive rubber. During dust collection operations, the cap 50 is opened and the frame 14 is placed on the ground (GR). At this time, the grounding knob 54C of the cap 50 abuts the ground (GR). This allows the cap 50 to discharge static electricity that builds up on the dust collector 10 during dust collection operations. During dust collection operations, static electricity is generated due to friction between the hose 60 and the cap 50, and the cap 50 is charged with static electricity. However, as described above, during dust collection operations, the cap 50 is opened and the grounding knob 54C of the cap 50 abuts the ground (GR). This means that the cap 50, made of conductive rubber, is grounded. This allows the cap 50, which closes the air intake 12F1, to discharge static electricity that builds up on the dust collector 10 during dust collection operations. Therefore, static electricity can be discharged without the need for a separate grounding member. This contributes to reducing the cost of the dust collection device 1.

In addition, the cap 50 is made of conductive rubber. This allows the cap 50 to be manufactured relatively inexpensively, further contributing to reducing the cost of the dust collection device 1.

The cap 50 is composed of a mounting tubular portion 52 that is attached to the intake pipe 12F of the housing 12, and a movable cap portion 54 that extends downward from the mounting tubular portion 52 when the cap 50 is in an open state. The extension length L of the movable cap portion 54 is set to be longer than the vertical distance H between the lower end of the frame portion 14 and the mounting tubular portion 52. This allows the movable cap portion 54 to bend and deform while the ground contact knob portion 54C of the movable cap portion 54 abuts the ground surface GR during dust collection operations. Therefore, the movable cap portion 54 can be maintained in good contact with the ground surface GR during dust collection operations.

The cap 50 is also constructed from a single member. That is, the mounting tube portion 52 and the movable cap portion 54 are integrally formed. This allows the cap 50 to be manufactured more inexpensively than if the mounting tube portion 52 and the movable cap portion 54 were constructed as separate bodies. This effectively reduces the cost of the dust collection device 1.

The movable cap portion 54 is composed of a plate-shaped hinge portion 54A that forms the base end of the movable cap portion 54, a plate-shaped ground knob portion 54C that forms the tip end of the movable cap portion 54, and a disk-shaped cap body 54B that is detachably attached to the front end of the mounting tube portion 52. The width dimensions of the hinge portion 54A and the ground knob portion 54C are set smaller than the diameter of the cap body 54B. This allows the hinge portion 54A and the ground knob portion 54C to be flexibly deformed while maintaining the rigidity of the cap body 54B when the cap 50 is open. As a result, when the cap 50 is open, the hinge portion 54A and the ground knob portion 54C can be flexibly deformed to bring the movable cap portion 54 into contact with the ground GR. When the cap 50 is closed, the hinge portion 54A can be bent to attach the cap body 54B to the mounting tube portion 52.

In this embodiment, the mounting tube portion 52 and the movable cap portion 54 of the cap 50 are integrally formed. However, as shown in FIG. 9, the mounting tube portion 52 and the movable cap portion 54 may be formed separately and then connected to form the cap 50 as an integrated unit. In this case, for example, the mounting tube portion 52 may be formed from a conductive resin (a resin material mixed with a filler such as carbon) and the movable cap portion 54 may be formed from a conductive rubber. This may increase the rigidity of the mounting tube portion 52 when attached to the housing 12, for example.

In addition, the inner surface of the hose 60 in this embodiment may be made of a conductive material. As a result, for example, when the hose 60 attached to the mounting tube portion 52 of the cap 50 collects dust that has fallen to the ground GR, the end of the hose 60 comes into contact with the ground GR, thereby discharging static electricity that has accumulated in the hose 60.

1. Dust collector (working machine)
10 Dust collector (main body)
12 Housing 12F1 Intake port 12G1 Exhaust port 30 Motor (drive unit)
38 Fan 50 Cap 52 Mounting tube portion 54 Movable cap portion 54A Hinge portion 54B Cap body 54C Grounding knob portion (grounding portion)
60 Hose 70 Dust bag (dust collection part)
GR: Ground surface H: Distance between the bottom end of the main body and the mounting tube in the vertical direction L: Extension length of the movable cap

Claims (10)

a main body having an intake port and an exhaust port;
a dust collecting unit attached to the main body and into which the airflow exhausted from the exhaust port flows;
a battery mounting section in which a battery is mounted;
Equipped with
The main body portion is
a drive unit to which power is supplied from the battery ;
a fan that is actuated by the driving force of the driving unit and generates the airflow from the intake port to the exhaust port;
a housing that houses the drive unit and the fan and has the intake port and the exhaust port;
a movable cap portion that is provided on the housing and includes a hinge portion that forms a base end portion, and a cap body that is connected to the hinge portion, and that is configured to be switchable by an operator between an open state in which the air intake port is open and a closed state in which the cap body closes the air intake port;
A work machine comprising: a hose that serves as a passage for the air flow flowing into the air intake is attached to the air intake;
The main body is configured to be able to be placed on the ground,
the cap body extends downward from the intake port in the open state and has a grounding portion at a tip end thereof ;
2. The work machine according to claim 1, wherein when the main body is placed on the ground and the movable cap is in the open state, the grounding portion comes into contact with the ground, thereby discharging charged static electricity through the movable cap . The work machine according to claim 2 , wherein the cap body is made of a conductive material and is flexible. a cap including a mounting tube portion, one end of which is mounted to the housing and the other end of which the hose is mounted, and the movable cap portion;
3. The work machine according to claim 2, wherein the extension length of the movable cap portion is longer than the distance between the lower end of the main body portion and the mounting tube portion in the vertical direction. 5. The work machine according to claim 4, wherein the cap is constructed from a single member. 5. The work machine according to claim 4, wherein the movable cap portion is made of a material in which carbon is mixed with rubber. 5. The work machine according to claim 4, wherein the resistance value of the movable cap portion is set to 10 12 ohms or less. The movable cap portion is
the disk-shaped cap body disposed between the hinge portion and the ground portion;
the plate-shaped grounding portion constituting the tip end of the movable cap portion;
It is composed of
The work machine according to claim 4, wherein the width of the hinge portion and the ground contact portion is smaller than the diameter of the cap body. The work machine according to any one of claims 2 to 8, wherein the inner peripheral surface of the hose is made of a conductive material. a main body having an intake port and an exhaust port;
a dust collecting unit attached to the main body and into which the airflow exhausted from the exhaust port flows;
Equipped with
The main body portion is
A drive unit;
a fan that is actuated by the driving force of the driving unit and generates the airflow from the intake port to the exhaust port;
a housing that houses the drive unit and the fan and has the intake port and the exhaust port;
a movable cap portion provided on the housing and configured to be switchable between an open state in which the air intake port is opened and a closed state in which the air intake port is closed;
Including,
a hose that serves as a passage for the air flow flowing into the air intake is attached to the air intake;
The main body is configured to be able to be placed on the ground,
the movable cap portion extends downward from the air intake port in the open state, has a grounding portion at a tip end, and has a cap body that can close the air intake port,
When the main body is placed on the ground and the movable cap is in the open state, the grounding portion comes into contact with the ground, thereby discharging charged static electricity through the movable cap.