JPS63158032A - Moving working vehicle with cord reel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention enables tasks such as cleaning, floor polishing, and transporting parts to be carried out using a cord reel by connecting it to a power supply part (for example, an outlet) formed on a room wall, etc. Regarding mobile work vehicles.

(b) Prior Art Various types of self-propelled mobile work vehicles have been invented to perform various tasks, and have been implemented as parts transport vehicles, golf carts, and self-propelled vacuum cleaners. In this technical field, mobile work vehicles can be roughly divided into four types. First of all,
There is a type that uses a built-in storage battery to drive travel and operation of the working part, as typified by Japanese Patent Application Laid-open No. 1-9047, Japanese Utility Model Application Publication No. 55-146042, and Japanese Patent Application Publication No. 58-149742. This type requires a large-capacity storage battery when working for long periods of time, making the work vehicle larger and heavier, making it unsuitable as a mobile work vehicle that is designed to be compact and work for long periods of time. .

Next, there is a mobile work vehicle that performs all operations using power supplied from a power supply unit such as a Hunsento. This mobile work vehicle is suitable for a single narrow area of work, such as continuous shooting of a certain area in a factory, by constantly dragging the power cord for the required length within the moving range, but it can also be used to cover a wide area. It is not suitable for mobile work. As an improvement on this point, there is a mobile work vehicle that has a power supply line etc. installed in the working range and supplies power from the power line with a sliding contact piece at any location in the mobile working range, but it is not necessary for the work range to be determined. It is limited to a range along a route, and requires wiring for the supply tm, making it suitable only for use in limited situations, for example, within a factory.

In addition, as a mobile work vehicle that can be used as a combination of various hojos, Japanese Patent Application Laid-Open No. 60-106302 and Japanese Patent Application Laid-Open No. 59-201115
There is something shown in the publication. The mobile work vehicle is driven by an on-board storage battery when moving from one workplace to another, and at the workplace, it is connected to a power supply such as an outlet.
It is used for both work and charging. the result,
Although the movement range can be expanded and the working time can be extended, the working position is the same as fixed, and the working range is narrow.

(c) Problems to be Solved by the Invention The present invention provides a mobile work vehicle that can expand the range of work in a workplace, lengthen the working time, and be more compact.

(d) Means for solving the problems The present invention divides a mobile work vehicle into upper, middle, and lower parts, forming wheels and an electric motor in the lower part, forming a working part in the upper part, and forming a working part in the middle part. At least a cord reel for a power cord for driving the working part is provided at the center of rotation of this cord reel, forming a passage connecting the upper and lower layers, and the length of the power cord being drawn out as the mobile work vehicle moves. Adjustments are made using a cord reel, and a wire is passed through the passage in the middle layer.

(E) Function The present invention is powered by a power supply unit formed on the room wall, etc., during work, so that work can be carried out for long periods of time. can perform a wide range of work without being blocked by the power cord. In addition, the upper and lower parts are connected to each other in the center of rotation of the two-to-one reel, and a passage for passing the electric wire is provided, so the cord outlet of the cord reel can be freely rotatable, allowing the work vehicle to No cords get tangled, making work more efficient.

Example) The present invention will be explained using a mobile work vehicle 1 that performs cleaning as shown in the figure as an example.

FIG. 1 is a longitudinal cross-sectional view of a mobile work vehicle 1 of the present invention, which is composed of an upper layer section 2, a middle layer section 3, and a lower layer section 4. Figures 2, 3 and 4
The figure and Figure 5 are the ■-■, m-m, IV-
FIG. 4 is a cross-sectional view taken along section IV, v-v. 6 is a right side view of the mobile work vehicle 1, FIG. 7 is a plan view of the mobile work vehicle 1 facing left, and FIG. 8 is an exploded longitudinal sectional view. 9th
The figure is a block circuit diagram of the mobile work vehicle 1.

As shown in FIGS. 1 and 2, the lower part 4 of the mobile work vehicle 1 includes a chassis plate 5 and support columns 6 erected on the chassis plate 5.
The lower substrate 7 is supported by the lower substrate 7. As shown in FIGS. 1 and 3.4, the middle layer section 3 has an upper substrate 9 connected to the upper end of a cylindrical column 8 that stands in the substantially central opening of the lower substrate 7, and connects the upper and lower substrates 9.7 to the upper end of the cylindrical column 8. It can be formed between. The chassis plate 5 and the L lower substrate 9.7 are molded from sheet metal, the cylindrical support 8 is formed from a metal tube, and the support pillar 6 is formed from a metal rod. The upper layer part 2 is formed on the upper surface side of the upper substrate 9, and covers the chassis plate 5 and the upper and lower substrates 9.7. It is formed by an exterior case 10 made by tlWfI. As shown in FIG. 7, the mobile work vehicle 1 has a square front half and a semicircular rear half, and the chassis plate 5 and upper and lower substrates 9.7 are also shaped accordingly. . The cylindrical support 8 is located at the center of the semicircular rear half portion of the supplementary upper and lower substrates 9.7.

A right wheel 11 and a left wheel 1 are installed in both hot parts of the chassis plate 5.
A right wheel electric motor 13 and a left wheel electric motor 14 that drive the wheels 2 are fixed. The right wheel electric motor 13 and the left wheel electric motor 14
is formed such that its rotating shaft 15,115 is located approximately in the radial direction passing through the center of the semicircular portion of the rear half of the chassis plate 5. The right wheel electric motor 13 and the left wheel electric motor 14
A right wheel position detecting section 17 and a left wheel position detecting section 18 are formed to detect the rotational positions of the right wheel 11 and the left wheel 12, and the rotation speed thereof. A front swivel wheel 19 extends forward and backward passing through the center of the semicircular portion of the rear half of the shear plate 5.
and form a rear swivel wheel 20. An integrated bumper 21 is formed at the front of the chassis plate 5 and extends around the front and both sides of the underlined portion of the exterior case 10. A collision detection section 22 is formed in the bumper unit 21. The collision detection section 22 is formed by being divided into front, left, and right parts, and its structure may be a pressure switch, contact switch, microswitch, etc. A pair of linear contact pieces are arranged, and the bumper unit 21 is formed to be detected by contact with the contact pieces that deform when pressure is applied thereto. Collision detection unit 22 by embedding a linear contact piece
By forming this, it is possible to create a collision in a wide area such as the front part with a single switch, and by dividing it, the left and right parts can be made into independent switches. Further, in this embodiment, the collision detection parts 22 are formed only on both sides of the front part, but by forming them on the lower edge of the rear part, it is also possible to detect a collision when reversing. Furthermore, by forming it in the upper and middle portions, it is possible to cope with collisions with the ceiling when passing through a tunnel-shaped portion. A suction tool 23 in the form of a brush that slides into contact with the floor F is formed on the lower front surface of the chassis plate 5. A cylindrical connecting portion 24 of the suction tool 23 protrudes into the chassis plate 5, and connects a pipe body 25 to the cylindrical connecting portion 24. The pipe body 25 is connected to the lower end of a suction ventilation pipe body 26 which is inserted into the cylindrical column 8 and fixed therein. The suction ventilation pipe body 26 is piped near the rear of the cylindrical support 8, and forms a space within the cylindrical support 8 that communicates the upper part 2 and the lower part 4, and connects the source cord or the upper part and the lower part. Wires such as control lines or signal lines to connect 2
7 passages. The chassis plate 5 includes a storage battery 28 that supplies power to the left and right wheel electric motors 13 and 14, and receives No. 18 from each pole detection unit such as the collision detection unit 22 and the left and right wheel position detection units 17 and 18. A control circuit 29 for controlling the mobile work vehicle 1 is installed. The storage battery 28 may be a lead-acid battery or a nickel-cadmium battery.In order to supply the drive voltage of 12V to the left and right wheels electric @ 13.14, 6V batteries are connected in series and distributed to the left and right. , evenly distributing the weight.

An obstacle detection section 30 is formed in the front part of the upper layer 2 of the E-fertilization substrate 9 to detect obstacles located in the front direction and left and right directions of the traveling mobile work vehicle 1. The obstacle detection section 30 measures the distance to obstacles (walls, desks, chairs, etc.), and uses an ultrasonic distance measuring device in this embodiment. Various devices can be used to measure distance, but when considering use at night or in a room with glass walls, it is best to use ultrasonic waves. In addition, it recognizes the shape of an object located in front of it, and runs in a way that is suitable for it.For example, when it recognizes a desk and cleans underneath it, in that case, by comparing it with a pre-memorized model pattern, Obstacles need to be recognized. In this case, it is necessary to use a distance measuring device. A reel motor j1132 for driving a cord reel 31, which will be described later, is formed on the −1° plane of the E board 9. A control plate section 34 having an opening/closing lid 33 is formed on the upper front surface of the exterior case 10. A switch formed on the control plate section 34 serves as a signal input section 35 to control and set the mobile work vehicle 1. A working section is formed at the rear of the exterior housing 10, and consists of a dust collecting section 36 and an electric blower section 37 in this embodiment. The dust collecting section 36 is housed in a housing section 38 formed at the rear of the exterior case 10. The dust collecting section 36 includes a dust collecting case 39 and a filter body 40. The upper end of the suction ventilation pipe body 26 protrudes from the bottom of the storage portion 38 and is fitted into the bottom suction port 41 of the dust collection case 39 . A valve body 42 is attached to the suction port 41. The electric blower section 37 is connected to the outer case IO so as to open and close the storage section 38.
The clamp body 43 is used to connect the clamp body 43. Said T.I.
An electric blower 44 is installed inside the moving blower section 37 . By operating the electric blower 44, dust is sucked from the suction tool 23 through the pipe body 25 and the suction ventilation pipe body 26 into the dust collecting section 36, and: The air from which dust has been removed is exhausted from the exhaust air ρ45 by the electric blower 44.A filter body 46 is also attached to the exhaust air 45.The electric blower +1244 is used for the left and right wheels when the mobile work vehicle 1 is in use. 11. The center of gravity is located at the rear of the center of 12, and when the dynamic blower section 37 is opened, the center of gravity is located at the front.

At the rear of the outer case 10 of the layer section 2, the back wall forms a groove 47 extending in the left-right direction and having a curved surface diameter larger than the curved surface diameter of the outer case 10. The center portion of the groove portion 47, that is, the rearmost portion shown in FIG. Although not included, it forms a coupling part for the external TL source connection part 48. The connection part 4
Reference numeral 8 is formed of a plug, and power is supplied by connecting the connecting portion 48 to a power feeding portion 49 formed on a wall of the chamber or the like. The connecting portion 48 is coupled to the coupling portion freely with respect to movement of the connecting portion 48 in the direction along the groove portion 47;
It is fixed against movement in the rear direction or in the direction perpendicular to the groove portion 47 while connected to the coupling portion. The connection part 4
(to the connection with the power supply section 49 of 8 and the connection section of the connection section 48) tu+t is the connection with the power supply section 49 of the
This is done at 0. The positioning of the connection part 48 with respect to the power supply part 49 is performed by using a Funcent position detection part 52 in which a signal from a Funcent position detection part 51 that notifies the position of the power supply part 49 is formed in the groove part 47 or near the connection part 48. Detection is performed by moving the mobile work vehicle 1.

A cylindrical intermediate rotating shaft 53 driven by the reel motor 32 is pivotally supported on the outside of the cylindrical support 8, and a cord reel 31 is pivotally supported on the outside thereof. A rotary support member 56 having an outlet S5 for the power cord 54 is disposed between the upper surface of the lower substrate 7 and the cord reel 31, and the rotary support member 56 is pivotally supported on the cylindrical support 8. . Bearing bodies 57, 58, 59, 6 are provided between the cylindrical support 8, the intermediate rotation shaft 53, the cord reel 31, the rotation support member 56, and the lower substrate 7.
0 is intervening. A gear 62 that meshes with a gear 61 of the reel motor 32 is provided on the upper outer periphery of the intermediate rotating shaft 53;
A clutch gear 64 that engages with a clutch claw body 63 formed on the cord reel 31 is formed. The clutch pawl body 63 is always biased in the direction of contacting the clutch gear 64.

In this embodiment, the gear 61 is
When the is rotated clockwise, the intermediate rotation shaft 53 is fully driven to the left, and the clutch gear 64 is rotated to the left, engaging the clutch claw body 63, and the cord reel 31 is driven to the left. When the cord reel 31 is rotated to the left, the 'W! ,
The m-cord 54 is wound up. When the gear 61 is rotated to the left by the reel motor 32, the intermediate rotating shaft 53 is rotated to the right, and the clutch gear 64 and the clutch pawl body 63 are engaged with each other as the clutch pawl body 63 is pushed outward by the clutch gear 64. First, the cord reel 31 does not rotate. Also,
While the reel motor 32 is stopped, when the power cord 54 is pulled by an external force, the cord reel 31 tries to rotate clockwise, but the clutch pawl 63 engages the clutch gear 64, causing the cord reel 31 to rotate clockwise. Not possible, said power cord 5
4, the reel motor 32 rotates the gear 61 to the left, rotates the intermediate rotating shaft 53 to the right, and rotates the cord reel 31 to the left to rotate the clutch gear 6 of the clutch pawl body 63.
This is done by disabling the power cord 54 from being engaged with the power cord 54 and pulling out the power cord 54 using an external force.

A roller body 65 is formed in the outlet portion 55 for smooth extraction, and a t-source cord slack detector 6G and a power cord length detector 67 (not shown) are formed in the outlet portion 55. The rotary support member 56 is formed in a cylindrical shape with a bottom, and one half of the side wall portion forming the outlet portion 55 is exposed so as to close a notch formed in the exterior case 10. The rotation support member 56 can be rotated regardless of the position of the cord reel 31, and the position of the drawer portion 55 with respect to the outer case 10 can be adjusted within an opening angle range of 180 degrees or f.
This can be freely changed within the angular range of the entire circumference (360 degrees) of the work vehicle, and the drawer portion 55 can be directed toward the source power supply portion 49 regardless of the orientation of the mobile work vehicle 1. The shortest length of the power cord 54 can be obtained, especially when the power cord 54 can be pulled out all the way around the work vehicle.
If the angle of the work vehicle can be changed freely, even if there are obstacles in the work area and the work vehicle moves in multiple directions, the
There is no risk that the source cord will wrap around the vehicle and restrict the operation of the vehicle. Power is supplied from the power cord 54 by bringing a contact piece 69 into contact with a sliding ring 68 formed on the top surface of the cord reel 31.The tS cord slack detection section 66 is formed of a microswitch.
The power cord length detection section 67 is formed by a rotation speed detection device linked to a roller, and signals from each detection section 66 and 67 are transmitted through a sliding ring formed on the rotation support member 56 and a contact piece formed on the lower substrate 7. 69 and sent to the control section 70.

Next, the operation of the mobile work vehicle 1 will be explained based on the electric circuit shown in No. 9188v.

The entire operation of the mobile work vehicle 1 is controlled by a vehicle drive control section 70 for controlling movement and a cleaner control drive section 71 for controlling work. The vehicle drive control section 70 and the vacuum cleaner control/drive section 71 are formed of a "ficrocomputer" in the wooden embodiment, and can easily provide high functionality.

The main input signal generating units to the vehicle drive control unit 70 are a signal input unit 35 formed on the control plate unit 34 and a tR cord length that detects the state of the power cord 54 being pulled out from the electric cord reel 31. A detection unit 67, an electric fi-cord slack detection unit 66, an obstacle detection unit 30 that detects obstacles in front of you during movement, a collision detection unit 22, and a single-source power supply unit that connects the power cord 54 to supply power in the workplace. 49, an outlet position detection section 52 and a Funcent plug connection detection section 50, and a right wheel position detection section 17 and a right wheel position detection section 18, which detect the positions and travel distances of the left and right wheels 11 and 12. and a floor condition detection unit 7 that detects the condition of the floor F on which the left and right heavy wheels 11 and 12 run and the suction tool 23 comes into sliding contact.
2, and a vacuum cleaner control/drive section 71. Control signals from the vehicle drive control section 70 are sent to a display section 73 that indicates the operating status and abnormality of the mobile work vehicle I, a notification section 74 that indicates the abnormality with light or sound, etc., and an electric cord reel 31, 32. A reel motor drive section 75 that stops the forward and reverse rotation of the left and right wheel motors 13 and 14, and a wheel motor drive section 7 that stops the forward and reverse rotation of the left and right wheel motors 13 and 14.
6 and storage batteries 28 to each electric motor 13, 14, 32, 44
Alternatively, it is output to the motor supply 11 source switching unit 77 that switches between power supply from the power supply unit 49 and power supply to the charging unit 78, and the sweeper control/drive unit 71.

If all the machinery of the mobile work vehicle 1 is operated fully automatically, the signal input section 35 may include a simple stop switch and a manual operation switch for smooth movement between work sites or during transportation. However, in order to adapt to various workplaces, it is necessary to increase the degree of freedom of movement and work by making it possible to change the program, and the structure for this purpose is a 10-kilometre part, an IC card input section, and a ROM. By forming the program change section, which may include a cartridge connection section, a floppy disk insertion/reading section, an external input/output terminal, etc., it is possible to change the movement route between work stations, the arrangement of work stations,
The shape and the position of the power supply section 49 can be memorized as appropriate, and accordingly, the movement and work of the mobile work vehicle 1 can be made smoother.

The display unit 73 and the notification unit 74 display and notify various operating states and abnormalities of the mobile work vehicle 1. For example, the display unit 73 and the notification unit 74 display and notify various operating states and abnormalities of the mobile work vehicle 1. Dislodging during work with the vehicle, falling off the bicycle, blocking movement due to unavoidable obstacles (door 1 stairs, etc.), collecting section 3
Displays the amount of collected dust, the time of disposal, the part of the work completed, and the end of the work as described in 6. Moreover, the mobile work vehicle 1 of the present invention
By supplying power from the power supply unit (for example, commercial power supply? j It is something. In the case of control using the power 8wI power transmission type, the signal input unit 35 requires a control judgment unit for that purpose, and the external power supply unit 49 is connected to the power supply unit 49 even during each moving operation t (10 while parking in the garage). It is necessary to connect the section 48.

The mobile work vehicle 1 is moved from the garage to the workshop and from one workshop to another using the motor supply 1i source switching unit 77 at N7F.
1 battery 28 is selected, and the storage battery 28 is connected to the wheel motor drive unit 76.
Pay from! The wheel electric motor drive unit 7
6 and make it run. When the left and right wheel electric motors 13 and 14 rotate in the same direction and at the same speed, the vehicle moves forward or backward; when the speeds are different, the vehicle turns to the right or left; and when it rotates in the opposite direction, the vehicle changes direction at that location. Since the positions of the front adjustable wheel 19 and the rear adjustable wheel 20 with respect to the left and right wheels 11, 12 are the same, the vehicle can move forward and backward in the same manner, and the travel trajectory can be the same.

When arriving at the work site, the mobile work vehicle 1 receives a signal (infrared signal) from the outlet position notifying unit 51 at the outlet position notifying unit 52 formed at the rear thereof, and receives 'Il! , source power supply section 49
While determining the position of the
is connected to the power supply section 49. The external power supply connection section 4B
When the power supply unit 49 contacts the power supply unit 49, the outlet/plug connection detection unit 50 detects the power supply, detects that there has been an initial contact, and starts the mobile work vehicle 70 using a signal from the vehicle drive control unit 70. It is moved straight back toward the power supply section 49 to completely read the external N/source connection section 48 to the power supply section 49 . When the external power supply connection section 48 and the power supply section 49 are completely connected, the outlet/plug connection detection section 5 formed by the switch built into the external X source connection section 48
0 component detects complete connection and inputs it to the vehicle drive control section 70, and an output signal based on it from the vehicle drive control section 70 is inputted to the electric motor supply source switching section 77, which switches the power supply from the storage battery. is switched to the power supply from the external 11L source connection section 48. When the power supply is switched, the same 12V DC power as that of the storage battery 28 is supplied to drive the wheel TGL1 and the leaf 1. Electric motor drive section 75 and vacuum cleaner control/drive section 7
The input AC 100V from the external power supply connection section 48 to the power storage/1h28 is supplied to the charging section 78 for the power storage/1h28. By supplying power to the charging group 78, the amount of power consumed by the storage battery 28 is replenished, and when the replenishment is completed, the charging section automatically stops.

When the mobile work vehicle 1 moves to the work start position and stops, a signal from the vehicle drive control section 70 is input to the vacuum cleaner control/drive section 71, and power supply to the electric blower 44 starts to start cleaning. The work start position in the example is 'w1. RF
f@ This is the position facing in the direction in which clockwise movement along the chamber wall in which the electrical part 49 is formed begins. Said external t/f! The separation of the X-connection part 48 from the joint part of the groove part 47 is caused by the connection in the direction along the groove part 47 due to rotation of the mobile work vehicle 1.
This is done by moving the number 8. When the external power supply connection part 48 is separated from the groove part 47 and the mobile work vehicle 1 starts traveling, a power cord 54 corresponding to the distance traveled is pulled out from the cord reel 31. The left and right wheel position detectors 17 and 113 and the power cord length detector 6 also detect the amount of travel, the travel direction, the pullout μ and the slack of the t-source cord 54.
7 and the power cord slack detection section 66 detects it, and the vehicle drive control section 70 determines that the power cord 54 is properly pulled out and slackened by the reel loosening machine drive section 7.
At 5, the signal is output from the vehicle drive control section 70.

The heavy crime transfer work vehicle 1 starts work, and there are various patterns for the route. The most traditional route is
1 in parallel to the chamber wall that formed the source power supply part 49, and when it collides with or is close to the adjacent chamber wall, changes direction by 180 degrees and works parallel to the chamber wall again. The route is to face the wall, work one after another, and end the work when you can no longer turn around. This route is used as one basic pattern, and if there is an obstacle along the movement, it is detected by the obstacle detection section 30 and the collision detection section 22 1, and the direction is changed appropriately to perform the work. Another route is to move clockwise while working along the room wall, change direction at the starting point, move counterclockwise, and return to the starting point. It is also conceivable to memorize a map and perform work based on that map. In this case, it is conceivable that there are many obstacles in the workplace and the power supply 1-1'54 will be wound up and become unable to move, so 1! It is best to do this without connecting the power cord 54 to the power supply TA power supply section 49;
L8I! It can also be used to detect 49. For example, upon arriving at the workplace, the mobile work vehicle 1 moves along the wall of the workplace to the right or left while detecting the signal from the detection unit 51 for the power supply unit 49 . Then, by always passing near the Hunsento position reporting unit 51 while moving, the position where the most received signal is played is stored in the map being created, and the map is created by going around the workshop once. After that, it moves to the location of the outlet position notification unit 51 stored on the district, detects the accurate position with the outlet position detection unit 52 from a nearby position, and connects the external power supply reading unit 48 to the power supply unit 49. .

During the work of the mobile work vehicle 1, the floor condition detection unit 72 detects the floor F.
For example, the state of the wooden floor, concrete floor, tatami, carpet, etc. is detected, and the traveling speed of the mobile work vehicle 1 and the vacuum cleaner control/drive unit 71 are controlled to determine the suction power of the electric blower 44 and the suction tool. Switching the suction tool 23 to a suction tool suitable for the floor F, switching the suction tool 23 by moving the sliding brush in and out, and stopping the turbine brush suitable for the jutan are orthodox switching.

When the mobile work vehicle 1 finishes working in the workshop, the electric blower 44 stops, and while winding the TM cord 54 onto the cord reel 31,
9 and connect the external power supply connection part 48 to the coupling part of the groove part 47. When connection to the joint is detected,
By inputting a signal to the motor supply power supply switching section 77, the power supply is switched to the storage battery 28, the mobile work vehicle 1 is moved forward, and the connection between the external power supply connection section 48 and the Tv and fA power supply section 49 is released. and move on to the next work area.

In the present invention, by forming the cord reel 31 in the middle layer part 3, it is possible to accurately detect the slack in the electric mock 154, and it is possible to reduce the possibility that the cord 54 gets caught on other floor objects due to the slack caused by pulling out the cord 54. This improves the stability of the mobile work vehicle 1. That is, the cord reel 3 is attached to the lower layer 4.
If the cord reel 31 is formed on the upper layer 2, the slack will not be detected accurately when the power cord 54 is pulled out in a large amount. Although this can be done, the length of the hanging cord becomes longer, and the power cord 54 moves due to the weight of the power cord 54 itself due to the forward and backward movement of the mobile work vehicle 1, and is often caught on unloaded objects. In addition, an accident may occur in which the power cord 54 is wired on a low object, and a situation may occur in which slack cannot be detected at all.

It should be noted that the present invention is not limited to the above-described embodiments, but can be implemented in various structures having the structure of the present invention without departing from the operational effects.
The working part is formed by the dust collecting part 36 and the electric blower part 37, but when working as a floor polisher,
A rotating brush may be provided on the lower surface of the chassis plate 5, and an electric motor for driving the rotating brush may be provided in the upper layer. Further, when the electric motor is disposed in the lower part, the upper part becomes a storage part for cleaning wax, brushes, etc. for floor polishing. Therefore, the working section may be a storage section for various parts necessary for carrying out the work, or may be a loading platform for a mobile work vehicle for transporting assembled parts. 32, but even a spring-type cord reel with a spring body for rewinding has the same effect, and in this case, the mechanism is a T8I-type stopper that prevents the spring from rewinding. It is formed by a one-sided clutch body with a lock, and the drawer can be freely drawn out with a one-way launch, and the clutch body can be removed and rewinding can be performed using a spring.

(G) Effects of the Invention The present invention has a cord reel for adjusting the draw-out length of the electric/y Bactization can be achieved. In addition, since the upper and lower parts are connected to each other in the center of rotation of the cord reel, and a passage is provided for passing the electric wire through, the cord reel can be provided with a cord outlet that can be freely rotated, allowing the work vehicle to It allows you to handle complex work areas without tangled code.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view;
Figure 2 is a sectional view taken from ■-■ in Figure 1, and Figure 3 is a cross-sectional view taken from ■-■ in Figure 1.
■ Cross-sectional view, Figure 4 is a cross-sectional view taken along The figure is an exploded longitudinal sectional view, and FIG. 9 is a block diagram. DESCRIPTION OF SYMBOLS 1... Mobile work vehicle, 2... Upper layer part, 3... Middle layer part, 4... Lower layer part, 5... Chassis plate, 7... Lower board, 8... Cylindrical branch, 9... Upper substrate, 11.12.
... Wheels, 13.14 ... Wheel electric motor, 23 ... Suction tool, 31 ... Cord reel, 32 ... Reel electric motor, 54 ... Power cord, 36 ... Dust collection part, 37・
・・Electric blower section

Claims (1)

[Scope of Claims] 1. A lower part that includes a self-propelled wheel and an electric motor that drives the wheel, and a cord reel that has an external power supply connection section at its tip and adjusts the length of the power cord as it moves. an upper layer forming a working part driven by feeding from the power cord; a passage provided at the center of rotation of the cord reel and communicating the upper and lower parts; A mobile work vehicle with a cord reel consisting of an electric wire passed through. 2. The mobile work vehicle with a cord reel according to claim 1, wherein the cord reel is electric. 3. The mobile work vehicle with a cord reel according to claim 1 or 2, wherein the working section is formed of a dust collection section and an electric blower, and a suction device is formed on the lower surface of the lower layer. 4. Claims 1 to 3, wherein a pair of substrates partitioning the middle layer and the lower layer and the middle layer and the upper layer are supported by a cylindrical support, and a cord reel is pivotally supported on the cylindrical support. A mobile work vehicle with a cord reel as described in Section 2.