JPH07327897A - Scrubber - Google Patents

Abstract

PURPOSE:To enable a rotative cleaning implement to be easily detached from a motor adaptor of a scrubber used mainly for cleaning floors. CONSTITUTION:A scrubber is provided with a mechanism serving to setting up cleaning implement by fitting the rotative implement to an axle of a motor adaptor fixed on a motor axle of electric brush motor and rotating the rotative implement in a direction so as to be interlocked and wedged in a direction of circumference of the axle, while releasing the interlock of rotative implement by rotating in the reverse direction. A brush motor 1 of the scrubber has a contact point 10a of a brush rotating switch and a contact point 11a of a brush inverting switch in its driving circuit so that the brush motor may switch rotating direction of the brush into a proper direction or reverse direction. Operating a brush switch 12 causes the brush motor 1 to drive properly or stop, while operating a brush inverting switch 13 causes the brush motor 1 to drive inversely.

Description

Detailed Description of the Invention

The present invention mainly relates to a scrubber used for cleaning a floor, and more specifically, is provided with a cleaning tool attachment / detachment mechanism capable of attaching / detaching a rotary cleaning tool such as a disc brush or a disc pad as needed. Regarding scrubber.

[0002]

2. Description of the Prior Art FIG. 6 schematically shows a scrubber of the type that cleans a floor with a cleaning liquid. The illustrated scrubber is of a self-propelled type, and has a body 31 provided with drive wheels 34 driven by a drive motor 33 using a battery 32 as a power source and driven wheels 35 of a caster type. A disk brush 37 as a rotary cleaning tool driven by an electric brush motor 36 is provided on the front side of the machine body 31, and a cleaning water in a cleaning water tank 38 installed on the top of the machine body 31 is connected to a hose 39. Then, the disc brush 3 is supplied to the disc brush 37.
Rotate 7 horizontally to wash the floor. And the airframe 31
A squeegee 40 for collecting dirty cleaning water after cleaning is provided on the rear side, and the cleaning water is sucked from the squeegee 40 through the vacuum hose 41 and collected in the recovery liquid tank 42. In the figure, 43 is a vacuum motor,
Reference numeral 44 indicates a handle.

FIG. 7 shows a drive circuit for a brush motor 36 which uses the battery 32 as a power source. When the brush switch 45 is turned on, the coil 46 of the brush rotating electromagnetic switch is energized, When the contact 46a is turned on, the brush motor 36 is driven. That is, the conventional motor drive circuit is configured to rotate the brush motor 36 in only one direction.

The disc brush 37 of the scrubber is constructed so that it can be attached to and detached from a motor adapter provided at the tip of the shaft of the brush motor 36 because of the necessity of replacement. As a cleaning tool attaching / detaching mechanism, a clutch plate and a motor adapter are provided. The fitting method is generally used. In this attachment / detachment mechanism, after the clutch plate provided on the disc brush 37 is fitted to the shaft portion of the motor adapter from below, the clutch plate is rotated in the direction opposite to the motor rotation direction and meshed in a wedge shape in the circumferential direction. Therefore, it is attached and detached by rotating it in the opposite direction to that at the time of attachment to release the engagement.

[0005]

By the way, the replacement work of the disc brush 37 is manually performed while the disc brush 37 is floated from the floor surface. That is, the disc brush 37 is exchanged by a procedure of gripping the outer periphery of the disc brush 37 with both hands and rotating the disc brush 37 in the detaching direction so that the disc brush 37 is detached from the motor adapter and then another disc brush to be exchanged is attached. However, when the clutch plate and the motor adapter are firmly bitten or rusted when the disc brush 37 is turned to be removed, the motor adapter will rotate together, so one worker will not be able to circle the disc brush 37. There is a problem that the plate brush 37 cannot be easily removed.

The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to easily remove a rotary cleaning tool for a scrubber from a motor adapter without the need for manual labor. Especially.

[0007]

In order to solve the above problems, the present invention is configured as follows. That is, after fitting the rotary cleaning tool to the motor adapter fixed to the motor shaft of the electric brush motor, rotate it in one direction and engage it in a wedge shape in the circumferential direction to attach it and rotate it in the opposite direction. In the scrubber provided with the cleaning tool attaching / detaching mechanism configured to release the meshing by means of the above, the drive circuit of the motor is configured to be reversible, and the rotation direction of the motor is switchable to the forward or reverse direction. It is characterized by that.

[0008]

In the scrubber according to the present invention configured as described above, when the rotary cleaning tool attached to the motor adapter is removed to replace the rotary cleaning tool,
If the switch is operated with the rotary cleaning tool grounded on the floor to rotate the motor in the direction opposite to the rotation direction during cleaning,
Since the motor adapter rotates in the detaching direction with respect to the rotary cleaning tool, the engagement between the clutch plate and the motor adapter is released. That is, according to the present invention, the rotary cleaning tool can be easily removed from the motor adapter by utilizing its ground resistance. It should be noted that it is possible to realize switching between forward rotation and reverse rotation regardless of whether the switch is a single switch or a plurality of switches. However, a plurality of switches are more convenient in terms of avoiding erroneous operation.

[0009]

As described above, according to the present invention, the rotary cleaning tool can be detached from the motor adapter by a switch operation, so that the operation is extremely simplified as compared with the conventional manual operation. Since the load due to the ground resistance acts on the rotary cleaning tool, it is possible to almost certainly disengage the clutch plate and the motor adapter even if they are firmly meshed with each other.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. The overall structure of the scrubber is the same as that of the conventional one described with reference to FIG. 6, so description thereof will be omitted, and the detaching mechanism of the disc brush as the rotary cleaning tool according to the present invention will be described with reference to FIGS. A description will be given based on FIG.

As shown in FIG. 2, an electric brush motor 1 for driving a brush is mounted upright on a scrubber base via a motor bracket 3 so that the motor shaft 2 faces downward. A brush-attached motor adapter 4 is fixed to the. This motor adapter 4 is formed in a substantially T-shaped cross section having a shaft portion 4b on the lower surface of the disc 4a, and is provided with a plurality of, in this embodiment, three rectangular locking claws 5 on the outer periphery of the shaft portion 4b. ing.

On the other hand, a disk brush 6 as a rotary cleaning tool.
Is a wooden or resin substrate 7 with flocked bottom surface,
It is composed of a substantially downward dish-shaped iron clutch plate 8 fixed to the upper surface of the base plate 7. The clutch plate 8 has a circular through hole 8a into which the shaft portion 4b of the motor adapter 4 can be fitted, and three notches through which the locking claws 5 formed on the peripheral edge of the through hole 8a can pass. Part 8b
And three locking flanges 8c, which are formed so as to extend downward along the peripheral edge surface of the hole and extend between the notches 8b, and to which the locking claws 5 can be locked.

The engaging flange 8c has a gradual increase in the amount of downward projection between the notches 8b from one end to the other end. That is, the lower end surface serving as the locking surface is formed in a curved shape, and the increasing direction thereof is the same as the rotation direction (the P arrow direction in the drawing) during cleaning of the brush motor 1.

In the brush attaching / detaching mechanism constructed as described above, when the disk brush 6 is attached to the motor adapter 4, as shown by phantom lines in FIGS. 3 and 4, the engaging claw 5 and the cutout 8b are provided. Under the condition that they are aligned on the same line, the through hole 8a of the clutch plate 8 is fitted to the shaft portion 4b of the motor adapter 4. At this time, the locking claw 5 passes through the notch 8b and faces the locking surface of the locking flange 8c. After that, when the clutch plate 8 is rotated in the direction opposite to the rotation direction when cleaning the brush motor 1, the locking flanges 8c are locked to the respective locking claws 5 as shown by the phantom lines in the drawing, and the clutch is locked by this locking. An upward force acts on the plate 8 to bring the upper surface of the clutch plate 8 into close contact with the lower surface of the disc 4a of the motor adapter 4.

That is, the clutch plate 8 and the motor adapter 4 are connected by engaging with each other in a wedge shape.
As shown in FIG. 5, the disc brush 6 is attached to the motor adapter 4. If the clutch plate 8 is rotated in the opposite direction to the mounting, that is, in the direction opposite to the rotation direction when cleaning by the brush motor 1, the mesh is released and the disc brush 6 is disengaged from the motor adapter 4.

In this embodiment, however, the disk brush 6 can be removed from the motor adapter 4 by utilizing the reverse rotation of the brush motor 1, which is based on FIG. Explain. FIG. 1 shows a drive circuit of the brush motor 1, in which a coil 10 of an electromagnetic switch for forward brush rotation and a coil 11 of an electromagnetic switch for reverse brush rotation are connected in parallel to a battery 9. A brush switch 12 for switching between driving and stopping of the motor 1 is inserted on the + side of both coils 10 and 11, and a motor is provided between the coil 10 and the brush switch 12 of the forward / reverse brush electromagnetic switch. The brush reverse switch 13 for reverse rotation is inserted.

The brush switch 12 is a c-contact type switch, and the contact is always in contact with the coil 11 side of the brush reverse electromagnetic switch, and the brush reverse switch 13 is an automatic reset type switch. And is always kept off. Therefore, switching of the brush switch 12 to the coil 11 side of the brush reverse electromagnetic switch substantially means switching to the stop side. on the other hand,
In order to switch the energization direction to the brush motor 1, between the battery 9 and each terminal of the brush motor 1, a normally open contact 10a of the brush forward rotation electromagnetic switch and a normally open contact of the brush reverse rotation electromagnetic switch are provided. The contact 11a of the formula is inserted, thus forming a motor drive circuit capable of forward and reverse rotation.

The brush switch 12 and the brush reversing switch 13 are installed at appropriate portions of the scrubber shown in FIG. 6. In this case, the brush switch 12 is installed near the handle 44, which can be easily operated. The brush reversing switch 13 is preferably installed at a position away from the brush switch 12 in order to avoid erroneous operation.

In the motor drive circuit constructed as described above, the brush switch 12 is always operated in the state shown in FIG. 1, that is, the brush reversing switch 13 is held in the off state. The motor 1 is stopped. When the brush switch 12 is operated toward the drive side to drive the disc brush 6 in this state, the coil 10 of the brush forward rotation electromagnetic switch is energized and the contact 10a thereof is turned on, so that the brush motor 1 rotates in the forward direction. Driven in the direction.

As described above, the normal rotation direction of the motor is the direction in which the locking claw 5 of the motor adapter 4 locks with the locking flange 8c of the clutch plate 8.
Therefore, the disc brush 6 is rotated integrally with the motor adapter 4, and the floor surface can be washed. After cleaning the floor surface, if the brush switch 12 is operated to the stop side, the power supply to the brush motor 1 is cut off and the brush motor 1 is stopped.

On the other hand, when the disk brush 6 is to be replaced while the brush motor is stopped, the brush reversing switch 13 is turned on while the disk brush 6 is kept in contact with the floor surface. Since the electromagnetic switch for reverse rotation is operated, the coil 11 of the electromagnetic switch for reverse rotation of the brush is energized and the contact 11a thereof is turned on. Therefore, the energization direction to the brush motor 1 is opposite to that in the normal rotation, and therefore the brush motor 1 is rotated in the reverse direction.

By this reverse rotation, the locking claw 5 of the motor adapter 4 is separated from the locking flange 8c of the clutch plate 8, and the engagement between the clutch plate 8 and the motor adapter 4 is released. At this time, the locking claw 5 comes into contact with the vertical end surface of the adjacent locking flange 8c as shown by the phantom line in FIG. Therefore, the clutch plate 8 is rotated in the reverse direction together with the motor adapter 4, whereby the release of the engagement is recognized.

By the way, when the disc brush 6 is disengaged, the disc brush 6 pressed against the floor is subjected to a load due to the ground resistance with the floor. Even if the motor adapter 4 is firmly meshed with each other, the grounding resistance almost certainly disengages the meshing.
After the engagement is released, if the entire scrubber is tilted or floated up, the locking claw 5 at the position in contact with the vertical end surface of the adjacent locking flange 8c will have the notch 8 in the clutch plate 8.
Since the disc brush 6 is aligned with b, the disc brush 6 is naturally pulled out from the motor adapter 4, and the labor of withdrawing is eliminated.

As described above, according to this embodiment, the disc brush 6 can be removed from the motor adapter 4 almost certainly, and it can be performed by the switch operation. In comparison, the work of removing the disc brush 6 can be simplified. In addition, since the present embodiment is provided with the dedicated switch 13 for the reverse rotation of the brush motor 1, there is also an advantage that an erroneous operation is less likely to occur as compared with the case where the single switch is used to switch between the forward and reverse rotations. is there.

The present invention is not limited to the embodiments shown in the drawings, and various modifications can be made without departing from the gist of the invention, and examples thereof are as follows. (1) In this embodiment, as the rotary cleaning tool, the disk brush 6 used for floor cleaning using a cleaning liquid has been described, but a pad, buff, mop, etc. for wiping or polishing by a dry method is used. But it doesn't matter. (2) The meshing structure between the motor adapter 4 and the clutch plate 8 is not limited to the illustrated type, but may be any wedge type meshing structure. (3) Furthermore, the drive circuit of the brush motor 1 is not limited to the configuration shown in the figure, and can be changed as appropriate, for example, the battery
A circuit for connecting between the brush motor 1 and the brush motor 1 is provided with a start / stop changeover switch, while a circuit for connecting the battery 9 and the coils 10 and 11 of the brush forward / reverse brush electromagnetic switch for forward / reverse switching is provided. A switch may be provided.

[Brief description of drawings]

FIG. 1 is a brush motor drive circuit diagram of a scrubber according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a disc brush attaching / detaching mechanism.

FIG. 3 is a plan view of the same.

FIG. 4 is an explanatory diagram of a meshing structure between a clutch plate and a motor adapter.

FIG. 5 is a side view of the disc brush attached state.

FIG. 6 is an overall view of a scrubber.

FIG. 7 is a conventional brush motor drive circuit diagram.

[Explanation of symbols]

 1 ... Brush motor 4 ... Motor adapter 6 ... Disc brush 8 ... Clutch plate 12 ... Brush switch 13 ... Brush reverse switch

Claims (1)

[Claims] 1. A motor adapter fixed to a motor shaft of an electric brush motor is fitted with a rotary cleaning tool, which is then rotated in one direction to engage in a wedge shape in the circumferential direction, so that the rotary cleaning tool is mounted in the reverse direction. In a scrubber provided with a cleaning tool attaching / detaching mechanism configured to release the meshing by rotating the motor in a forward direction, the drive circuit of the motor is configured to be forward / reverse rotatable, and the rotation direction of the motor is switchable to a forward rotation or a reverse rotation direction. Scrubber with switch.