JP2010029599A - Floor working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working machine including a collection tank freely moved by wheels, an outlet provided at the upper end of the collection tank, a lid body attachable to and detachable from the outlet, a squeegee connected to the collection tank, and an electric vacuum pump provided at the lid body so as to suck air of the collection tank, wherein the vacuum pump is accurately prevented from sucking a collected object, irrespective of the characteristics of the collected object, while preventing an increase in the size of the collection tank, securing a desired collection amount, preventing an increase in trouble when removing the vacuum pump and transporting the collected object. <P>SOLUTION: A full capacity-detecting section 20 for detecting the full capacity of the collection tank 5 includes a sensor electrode 22 provided at the lid body 10 to make contact with the object collected by the collection tank 5, and a detection control portion 21 provided at the lid body 10 while cooperating with the sensor electrode 22. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides a recovery tank that can be transferred by wheels, a discharge port provided at an upper end of the recovery tank, a lid that is detachable from the discharge port, a squeegee that communicates with the recovery tank, and a recovery tank. The present invention relates to a floor working machine including an electric vacuum pump provided on the lid body so as to perform an intake action.

The floor surface work machine described above sucks and discharges the internal air of the recovery tank by an electric vacuum pump to generate a suction force in the recovery tank, and collects collected materials such as sewage and dust generated by floor cleaning and wax peeling treatment. It can be collected from the floor surface by sucking it into a collection tank through a squeegee.
This type of floor work machine can easily remove the electric vacuum pump by simply removing the lid when discarding the collected material from the collection tank, and can transfer the tank to reduce the weight and size. It is. For those using a commercial power supply, the electrical cord can be left with the lid at the work site, and the electrical cord can be removed from the outlet and taken up for carrying around, so that it can be recovered. The work interruption time required for waste disposal can be shortened.

Conventionally, for example, there have been techniques described in Patent Documents 1 and 2 as techniques relating to detection of a full recovery tank.
In what is described in Patent Document 1, four guide portions 45 arranged in a circle below the vent 42 and the communication port 43 that communicate the fan portion 17 of the electric blower 18 and the inside of the water storage container 3; The float 48 is provided inside the four guide portions 45. The float 48 floats along the guide portion 45 when the water level of the water storage container 3 rises. The upper surface of the float 48 that has floated closes the communication port 43. (Each symbol is described in the publication.)

  The device described in Patent Document 2 includes positive and negative electrodes 6P and 6M embedded in the sewage tank 1 with an appropriate interval. Both electrodes 6P and 6M are electrically connected to each other when the collected sewage or bubbles reach the full tank line. (Each symbol is described in the publication.)

JP 2006-204458 A (paragraphs [0021], [0025], [0027], FIGS. 2 and 3) Japanese Utility Model Publication No. 6-34766

  In this type of floor work machine, when collected material such as sewage collected in the collection tank enters the vacuum pump, it is scattered around the work machine due to the exhaust of the vacuum pump, and rust and failure occur in the vacuum pump. Sometimes. This type of floor working machine is configured to detect the fullness of the collection tank so as to avoid the occurrence of the trouble described above.

When the conventional technology described in Patent Document 1 is adopted, it becomes difficult to avoid the suction of the collected material of the vacuum pump, or the recoverable amount of the recovered material is smaller than the size of the recovery tank, or the recovery tank is enlarged. There was a problem that had to be done.
In other words, bubbles may be generated depending on the collected material such as sewage collected when the wax is peeled off or the floor surface is washed with a detergent. In such a recovered material, the generation of bubbles becomes significant due to a decrease in the tank internal pressure due to the suction of the vacuum pump. In this case, even if the bubble reaches the full level, the float does not rise to the full level, the full detection is not performed, and if the vacuum pump is not automatically stopped or manually stopped, the vacuum pump bubble suction will occur. May end up.
When the float is used, dust is easily clogged between the float and the guide member. In this case, even if the float moves poorly and the collected material reaches the full level, full detection is not performed, and the collected material is easily sucked into the vacuum pump.
In addition, when a float is used, a member that enters the recovery tank, such as a guide that supports the float, becomes large, and the space in the tank occupied by this member increases, so that the recoverable amount is larger than the size of the recovery tank. Less. In order to be able to secure a desired recoverable amount, it is necessary to enlarge the recovery tank by the tank capacity occupied by the members entering the recovery tank.

When the prior art described in Patent Document 2 is adopted, the labor required to discard the collected material tends to be large.
That is, the control means provided in the lid for controlling the vacuum pump and the electrode provided in the collection tank are linked by the wiring extending between the lid and the collection tank. Then, when transferring the collection tank to discard the collected material, it is necessary to separate the wiring connecting the detection control unit and the electrode in order to remove the lid and leave the vacuum pump at the work site. Become.

  The object of the present invention is to collect the vacuum pump while securing a desired recoverable amount while preventing an increase in the size of the recovery tank, and preventing an increase in labor when removing the vacuum pump and transporting the collected material. An object of the present invention is to provide a floor work machine capable of accurately avoiding object suction regardless of the characteristics of the collected material.

The first invention includes a collection tank that can be transferred by a wheel, a discharge port provided at an upper end of the collection tank, a lid that is detachable from the discharge port, a squeegee that communicates with the collection tank, and the collection In a floor work machine provided with an electric vacuum pump provided on the lid so as to act as an intake air to the tank,
A fullness detecting means for detecting the fullness of the recovery tank is provided with a sensor electrode provided on the lid so as to contact the collected material by the recovery tank, and a detection provided on the lid in a state linked to the sensor electrode. And a control unit.

  According to the configuration of the first aspect of the present invention, when there are no bubbles in the recovered material, when the recovered material reaches the full level, the sensor electrode and the recovered material come into contact with each other, so that the detection control unit detects and operates to detect fullness. Can be in a detection state. When there are bubbles in the recovered material, when the bubbles reach the full level, the sensor electrode and the bubbles come into contact with each other, so that the detection control unit can perform detection operation so that the full detection means enters the detection state. As a result, even if the sensor electrode or the electrode holder enters the recovery tank, the space in the tank occupied by the sensor electrode and the electrode holder can be made smaller than in the case of using the float, and the lid can be used for linking the sensor electrode and the detection control unit. While the wiring between the body and the recovery tank is unnecessary, it is possible to detect that the recovered material and bubbles have reached the full level while eliminating the occurrence of malfunction due to dust clogging in the case of a float. Then, the detection information by the full detection means knows that the collected material and bubbles have reached the full level, and that the collected material and bubbles are collected or generated exceeding the full level and is sucked into the vacuum pump. In order to avoid this, the electric vacuum pump can be stopped with good timing by automatic operation or manual operation.

Accordingly, it is possible to accurately avoid the collected material and bubbles from being sucked into the electric vacuum pump and to perform the work without the collected material scattering, and to prevent the electric vacuum pump from being deteriorated or broken down due to the collected material suction.
Moreover, when discarding the collected material, the electric vacuum pump can be easily removed by simply removing the lid, and there is no need to separate the sensor electrode from the detection control unit. Can be done.
Furthermore, compared to the case of using float, the amount of space in the tank occupied by the full detection means is reduced, so that the recoverable amount can be increased without increasing the recovery tank, or the desired recovery can be performed while reducing the recovery tank. The floor working machine can be secured in a small amount and easy to handle as compared with the recoverable amount.

  In the second aspect of the present invention, an electrode housing recessed portion into which the sensor electrode has entered is provided.

  According to the configuration of the second invention, in addition to the operations and effects of the configuration of the first invention, the following operations and effects are provided.

  The sensor electrode entering the electrode housing recess prevents the sensor electrode from being applied to the floor surface when the lid is removed, and deterioration or failure due to suction of collected or foam from the electric vacuum pump. In addition to being hard to generate, it is easy to avoid breakage of the sensor electrode, so that a high-quality floor work machine with excellent durability can be obtained.

  In the third invention, the fullness detection means is a capacitance sensor, and a set interval is provided between the inner wall surface of the electrode housing recess and the sensor electrode.

  According to the configuration of the third invention, in addition to the operations and effects of the configuration of the second invention, the following operations and effects are provided.

  By appropriately setting the set interval, the periphery of the sensor electrode is opened, and the sensor electrode can be provided with a contact area that facilitates contact with the recovered material and bubbles. As a result, it is possible to prevent the sensor electrode from colliding and being damaged by the electrode receiving recessed portion, but to prevent contact leakage between the sensor electrode and the collected material or bubbles, and to perform detection accurately.

  In this 4th invention, the said sensor electrode is provided over the exhaust path provided in the said cover body so that the air in a collection tank may be sucked and discharged by the said electric vacuum pump, and the location protruded inside the collection tank from the said exhaust path. It is.

  According to the configuration of the fourth invention, in addition to the operations and effects of the configuration of the third invention, the following operations and effects are provided.

  When the collected material and bubbles reach the full level, the sensor electrode and the collected material and bubbles come into contact with each other at a place where the collected material and bubbles come out from the exhaust path to the inside of the collection tank. If a detection failure occurs due to adhesion of a wax component or the like to the sensor electrode at this location, the recovered material or bubbles are recovered or generated exceeding the full level and enter the exhaust path. In this case, the sensor electrode comes into contact with the collected material and bubbles in the exhaust path. That is, even if a detection failure occurs at the full level, when the collected material or bubbles start to enter the exhaust passage, the detection control unit detects and operates, and the full detection means enters the detection state. The electric vacuum pump can be stopped. As a result, even if the collected material and bubbles are collected or generated above the full level due to the occurrence of a detection failure at the full level, the collected material of the electric vacuum pump is slightly over the full level. It is possible to prevent the suction of bubbles and bubbles, or to keep the amount small, and from this aspect as well, the electric vacuum pump can be effectively prevented from being deteriorated or broken down.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1A is an overall perspective view of a floor working machine according to an embodiment of the present invention. FIG. 2 is a side view of the floor work machine according to the embodiment of the present invention. As shown in these drawings, the floor working machine according to the embodiment of the present invention has a pair of left and right caster-type front wheels 1 and 1, a pair of left and right freely swingable rear wheels 2 and 2, and a handle 3. Cart 4, a collection tank 5 supported by the cart 4, an electric vacuum pump 6 provided inside the lid 10 of the discharge port 5 a located at the upper end of the collection tank 5, and the front end of the cart 4 And a squeegee 7 supported by the section.

  This floor surface working machine performs the operation | work which collect | recovers collection materials, such as washing | cleaning sewage and peeling sewage which generate | occur | produced by carrying out the washing | cleaning process or wax peeling process from a floor surface.

  That is, the electric vacuum pump 6 is connected to a commercial power source by an electric cord 8 (see FIG. 2) extending from the lid 10 and enters a power switch 9 (see FIG. 2) provided on the lid 10. It can be driven by operating. The driven electric vacuum pump 6 sucks into the recovery tank 5, and the suction force generated by the internal pressure drop in the recovery tank 5 communicates the upper part of the internal space of the recovery tank 5 with the squeegee 7. Act on. As a result, when the cart 4 is moved on the floor surface by pushing the handle 3 while driving the electric vacuum pump 6, the squeegee 7 gathers the collected material on the floor surface, and the collection tank 5 collects the collected material collected by the squeegee 7. A thing is sucked and collected through the suction hose 7a.

  FIG. 2 shows a longitudinal sectional structure of the lid body 10. As shown in the figure, the lid 10 includes a head cover 11 and a cover plate 12 connected to the inner surface side of the head cover 11. The lid body 10 includes an attachment portion 13 formed over the entire periphery of the lid body 10 by the peripheral edge portion of the head cover 11 and the peripheral edge portion of the cover plate 12, and the upper end of the collection tank 5 is formed by the attachment portion 13. By fitting it into the part, it can be detachably attached to the discharge port 5a of the recovery tank 5.

  As shown in FIG. 2, the lid body 10 includes an electrode holder 15 supported on the space between the pump mounting plate 14 and the cover plate 12 mounted inside the head cover 11 and the bottom surface side of the cover plate 12. The recovery tank is provided with an exhaust passage 16 formed at the bottom of the lid body 10 with a vertically extending through hole. The space between the pump mounting plate 14 and the cover plate 12 and the through hole of the electrode holder 15 communicate with each other through a communication hole 12 a provided in the cover plate 12. The electrode holder 15 forms an inlet 16 a that opens into the recovery tank of the exhaust passage 16.

  The electric vacuum pump 6 includes an electric motor 6 a housed in a motor chamber 17 formed by the head cover 11 and the pump mounting plate 14, and a blower 6 b disposed in the exhaust passage 16. is there. The electric motor 6 a and the blower 6 b are supported by the pump mounting plate 14.

  In other words, the electric vacuum pump 6 drives the blower 6b by the electric motor 6a and causes the blower 6b to generate conveying air in the exhaust passage 16, thereby sucking and discharging the air in the collection tank to the exhaust passage 16. That is, the air inside the collection tank 5 is sucked into the blower 6b from the inlet 16a of the exhaust passage 16 through the through hole of the electrode holder 15 and the communication hole 12a of the cover plate 12, and from the blower 6b to the cover plate. 12 and the head cover 11 are sent to the periphery of the head cover 11 and discharged to the outside of the lid 10 through the exhaust port 18 located in the periphery.

  Fig. 1 (b) is a perspective view of the floor working machine in a collected material disposal state. As shown in this figure, when discarding the collected material collected in the collection tank 5, the floor work machine is in a collected material disposal state by removing the lid 10, and the discharge port 5 a of the collection tank 5 is disposed. Is opened, the collected matter can be discharged, and the collection tank 5 can be transported by the front wheel 1 and the rear wheel 2 in a lightweight and compact state in which the electric vacuum pump 6 is detached together with the lid 10.

  This floor work machine includes a full detection means 20 having a detection control unit 21 provided on the lid 10 in a state of being supported by a control box 30 located in the motor chamber 17 as shown in FIG. 2, and the detection control. The pump stop control means 31 linked to the section 21 is provided.

FIG. 3 is a perspective view of the full detection means 20 and the electrode holder 15. As shown in FIG. 2 and FIG. 2, the fullness detection means 20 includes the detection control unit 21 and also includes an electric cord-type sensor electrode 22 linked to the detection control unit 21. .
In FIG. 3, the sensor electrode 22 is shown in a state shifted from a predetermined assembly position with respect to the electrode holder 15.

  The detection control unit 21 includes a substrate and an electronic component mounted on the substrate.

  As shown in FIGS. 2 and 3, the sensor electrode 22 is connected to the electrode holder 15 through the wiring hole of the pump mounting plate 14 and the exhaust passage 16 from the detection control unit 21 to the electrode holder 15. 10 is provided. The sensor electrode 22 includes a ground electrode 23 formed by one of a pair of electric cord electrodes and a detection electrode 24 formed by the other. The ground electrode 23 and the detection electrode 24 are maintained in an insulated state over the entire length by an insulator attached to both the electrodes 23 and 24.

  FIG. 4 is a bottom view of the electrode holder 15. FIG. 5 is a longitudinal sectional view of the electrode holder 15. As shown in FIG. 2 and FIG. 2, the sensor electrode 22 includes the bottom electrode 15a of the electrode holder 15 of the ground electrode 23 and the detection electrode 24 (a part that protrudes from the exhaust path 16 to the inside of the recovery tank). ) And a portion of the ground electrode 23 and the detection electrode 24 that is wired to the through-hole of the electrode holder 15 (the location of the exhaust path 16). And a sub-detector 22b. The main detection unit 22a is supported by the electrode holder 15 in a state where it is disposed at the full level L of the collection tank 5. The main detection unit 22a is wired in a circular shape when viewed in the vertical direction of the collection tank, and performs detection in a planar detection target range.

  As shown in FIG. 5, the sub-detecting portion 22 b of the sensor electrode 22 is supported by the electrode holder 15 in a state of being arranged at a level higher than the full level L of the recovery tank 5.

That is, when no bubbles are generated in the recovered material collected in the recovery tank 5, when the recovered material reaches the full level L and contacts the main detection portion 22 a of the sensor electrode 22, the gap between the ground electrode 23 and the detection electrode 24 is reached. The capacitance value changes. When bubbles are generated in the recovered material collected in the recovery tank 5, when the bubbles reach the full level L and come into contact with the main detection portion 22 a of the sensor electrode 22, electrostatic capacitance between the ground electrode 23 and the detection electrode 24 is detected. The capacitance value changes. Even if the recovered material or bubbles come into contact with the main detection unit 22a of the sensor electrode 22, the capacitance value between the ground electrode 23 and the detection electrode 24 is reduced due to adhesion of the wax component on the main detection unit 22a. When the change does not occur or the change is smaller than the set change value, when the collected material or the bubble exceeds the full level L and contacts the sub-detection portion 22b of the sensor electrode 22, the contact between the ground electrode 23 and the detection electrode 24 The capacitance value in between changes.
The full detection means 20 is constituted by a capacitance sensor, and the collected material or bubbles come into contact with the main detection unit 22a or the sub detection unit 22b of the sensor electrode 22, so that the space between the ground electrode 23 and the detection electrode 24 is reached. When the detection control unit 21 detects this and the capacitance value changes, the full detection state is obtained.

  When the fullness detection means 20 is in a full detection state, the pump stop control means 31 sets a pump control circuit that has been turned on by an operation by the power switch 9 based on detection information from the fullness detection means 20. The electric vacuum pump 6 is stopped by switching to the cut-off state.

In other words, when the collection tank 5 is full when the collected material that does not generate bubbles is collected, the bubble is full when the collected material that generates bubbles is collected even if the collection tank 5 is not full. When full, the full detection means 20 enters a full detection state, and the pump stop control means 31 stops the electric vacuum pump 6 based on the detection information from the full detection means 20, and collects and bubbles from the electric vacuum pump 6. Prevent suction.
If the full detection means 20 does not enter the full detection state despite the fact that the recovered material and bubbles have reached the full level L due to adhesion of the wax component at the main detection portion 22a of the sensor electrode 22, the recovered material and bubbles When the full level L is slightly exceeded and the sub-detection unit 22b of the sensor electrode 22 is touched, the full detection means 20 is in a full detection state, and the pump stop control means 31 is based on the detection information from the full detection means 20, and the electric vacuum pump 6 is stopped, and suction of the collected material and bubbles of the electric vacuum pump 6 is prevented.

As shown in FIGS. 3, 4, and 5, a groove-shaped electrode housing recess 32 is provided on the bottom surface 15 a and the inside of the electrode holder 15. The electrode housing recessed portion 32 of the bottom surface 15 a opens toward the inside of the collection tank 5, and the internal electrode housing recessed portion 32 opens toward the exhaust path 16.
That is, when the electrode holder 15 causes the main detection portion 22a and the sub detection portion 22b of the sensor electrode 22 to enter the electrode housing recessed portion 32 and the lid 10 is removed from the collection tank 5, the main detection portion 22a It is prevented from being damaged or broken by hitting the sub-detecting portion 22b against the floor surface or hitting a tool.

FIG. 6 is a cross-sectional view of the electrode housing recess 32. As shown in this figure, the electrode receiving recessed portion 32 includes an inner wall surface 32a of the electrode receiving recessed portion 32 and the sensor electrode 22 on both sides of the main detecting portion 22a and the sub detecting portion 22b of the sensor electrode 22. The main detection unit 22a and the sub detection unit 22b are inserted in a state where the set interval D1 is provided therebetween.
The set interval D1 includes a contact area that opens the periphery of the sensor electrode 22 in the main detection unit 22a and the sub-detection unit 22b, and facilitates contact with the collected material and bubbles on the peripheral surface of the sensor electrode 22. Yes. As the set interval D1, an interval having a size equal to or larger than the outer diameter D2 in the horizontal direction of the sensor electrode 22 is preferably set. The depth D3 of the electrode housing recess 32 is preferably set to a depth equal to or greater than the outer diameter D4 of the sensor electrode 22 in the vertical direction.

  As shown in FIG. 2, the pump mounting plate 14 becomes a shielding member positioned between the motor chamber 17 and the exhaust passage 16, shields the motor chamber 17 from the exhaust passage 16, and collects it in the exhaust passage 16. Even if an object or foam may flow in, the collected object or foam is prevented from entering the control box 30, the detection control unit 21, and the motor stop control means 31.

[Another Example]
FIG. 7 is a cross-sectional view of an electrode housing recess 32 having another embodiment structure. The electrode housing recess 32 includes an electrode holding groove 33 provided on the bottom surface 32b, and the sensor electrode 22 is locked by the electrode holding groove 33 so that the sensor electrode 22 is accurately positioned in the electrode housing recess 32. Yes.

FIG. 8 is a perspective view of an electrode holder 15 having a further implementation structure and a sensor electrode 22 having another implementation structure.
The electrode holder 15 includes a through hole that constitutes the exhaust passage 16 and the inlet 16a of the exhaust passage 16, and an electrode housing recess 32 provided on the bottom surface 15a of the electrode holder 15, and an outer peripheral surface 15b of the electrode holder 15. The electrode receiving recess 32 is provided.

  The sensor electrode 22 includes a main detection portion 22a accommodated in the electrode accommodation recess 32 on the bottom surface 15a of the electrode holder 15, and a sub detection portion 22b accommodated in the electrode accommodation recess 32 on the outer peripheral surface 15b of the electrode holder 15. It has. The main detection unit 22a is arranged at a full level L (see FIG. 2) of the collection tank 5 in a circularly wired state. The sub detection unit 22b is disposed at a level higher than the full level L of the collection tank 5.

FIG. 9 is a perspective view of an electrode holder 15 having a further implementation structure and a sensor electrode 22 having another implementation structure.
The electrode holder 15 includes a through hole that constitutes the exhaust path 16 and the inlet 16 a of the exhaust path 16, and an electrode housing recess 32 provided on the bottom surface 15 a of the electrode holder 15.
The sensor electrode 22 includes a main detection portion 22a housed in the electrode housing recess 32 on the bottom surface 15a of the electrode holder 15, and a sub-detection portion 22b disposed in the through hole that constitutes the exhaust passage 16 of the electrode holder 15. I have. The main detection unit 22a is wired in a circle and is disposed at the full level L (see FIG. 2) of the collection tank 5. The sub-detecting portion 22b is disposed at a level higher than the full level L of the collection tank 5 in a state of being wired along the inner wall surface of the through hole of the electrode holder 15 in a spiral manner.

FIG. 10 is a perspective view of an electrode holder 15 having a further implementation structure and a sensor electrode 22 having another implementation structure.
The electrode holder 15 includes a through hole that constitutes the exhaust passage 16 and the inlet 16a of the exhaust passage 16, and an electrode housing recess 32 provided on the bottom surface 15a of the electrode holder 15, and an outer peripheral surface 15b of the electrode holder 15. The electrode housing recess 32c is provided in a spiral shape.
The sensor electrode 22 includes a main detection portion 22a accommodated in the electrode accommodation recess 32 on the bottom surface 15a of the electrode holder 15 and a sub detection portion 22b disposed in the electrode accommodation recess 32c on the outer peripheral surface of the electrode holder 15. I have. The main detection unit 22a is arranged at the full level L (see FIG. 2) of the collection tank 5 while being wired in a circular shape. The sub-detecting portion 22b is disposed at a level higher than the full level L of the collection tank 5 in a state where the auxiliary detecting portion 22b is spirally wired along the electrode receiving recessed portion 32c on the outer peripheral surface of the electrode holder 15.
The sub-detecting portion 22b of the sensor electrode 22 shown in FIGS. 9 and 10 is detected in a planar detection target range by being spirally wired.

  Instead of the above embodiments, the sensor electrode 22 of the capacitance sensor 20 may be implemented by adopting a configuration in which the main detection unit 22a is wired in a series of spirals with the sub-detection unit 22b. Also in this case, the object of the present invention can be achieved.

  In place of the capacitance sensor 20 of the above-described embodiment, a positive electrode and a negative electrode are provided, and when both electrodes come into contact with the collected material or bubbles that have reached the full level and become conductive, this is detected by the detection control unit. In this case, a configuration in which the full detection state is obtained may be adopted. Even with this configuration, the object of the present invention can be achieved.

  The present invention can also be applied to a floor working machine having a nozzle type configuration in which the squeegee is supported and operated by hand instead of the floor working machine described above. The object of the present invention can be achieved even in a nozzle type floor surface working machine having a squeegee.

(A) is an overall perspective view of the floor work machine, (b) is a perspective view of the floor work machine in a collected material disposal state. Side view of floor working machine Perspective view of full detection means and electrode holder Bottom view of electrode holder Vertical section of electrode holder Cross-sectional view of electrode receiving recess Sectional drawing of the electrode accommodation recessed part provided with another implementation structure The perspective view of the electrode holder provided with another implementation structure, and the sensor electrode provided with another implementation structure, Furthermore, the perspective view of the electrode holder provided with another implementation structure, and the sensor electrode provided with another implementation structure, Furthermore, the perspective view of the electrode holder provided with another implementation structure, and the sensor electrode provided with another implementation structure,

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 Wheel 5 Recovery tank 5a Recovery tank discharge port 6 Electric vacuum pump 7 Squeeze 10 Lid 16 Exhaust path 20 Full detection means 21 Detection control part 22 Sensor electrode 32, 32c Electrode accommodation recessed part 32a Inside of electrode accommodation recessed part Wall D1 setting interval

Claims (4)

A collection tank that is transportable by wheels, a discharge port provided at the upper end of the collection tank, a lid that is detachable from the discharge port, a squeegee that communicates with the collection tank, and an intake action on the collection tank A floor work machine comprising an electric vacuum pump provided on the lid,
A fullness detecting means for detecting the fullness of the recovery tank is provided with a sensor electrode provided on the lid so as to contact the collected material by the recovery tank, and a detection provided on the lid in a state linked to the sensor electrode. A floor work machine comprising a control unit.   The floor work machine according to claim 1, wherein an electrode receiving recessed portion into which the sensor electrode is inserted is provided. The full detection means is a capacitance sensor;
The floor work machine according to claim 2, wherein a set interval is provided between an inner wall surface of the electrode receiving recess and the sensor electrode.   The said sensor electrode is provided over the exhaust path provided in the said cover body so that the air in a collection tank may be sucked and discharged by the said electric vacuum pump, and the location protruded inside the collection tank from the said exhaust path. Floor work machine.

Images