JP2564577Y2 - Safety device for floor cleaning machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cleaning device for rotating a cleaning pad with a motor and, if necessary, rotating a wheel to clean a floor surface or to clean or polish a floor surface. It is used in the technical field of various floor cleaning machines (hereinafter, simply referred to as floor cleaning machines) for performing the above-described operations. More specifically, the present invention is suitably applied to a starting lever of a floor cleaning machine. Related to safety devices.

[0002]

2. Description of the Related Art A conventional floor cleaning apparatus for cleaning a floor while rotating a pad by a motor and running the same is provided at the rear of the body, for example, as disclosed in Japanese Patent Application No. 1-22391. Attach the operating box to the upper end of the handle pipe, attach the handlebar and the start lever (operating lever) to the left and right sides of the operating box, turn on the power switch, and then squeeze either the left or right start lever upward. When turned, the limit switch mounted inside the operation box is turned on, the motor is driven, the cleaning pad rotates at high speed to clean or polishes the floor surface, and a relatively large self-propelled In the case of a walking floor cleaning machine, the above-described motor rotates both the pad and the wheels as necessary, and cleans the floor while running the cleaning machine.

[0003]

However, in the conventional floor cleaning machine constructed as described above, the safety switch (locking device) is not provided at the start lever portion, so that the power switch is turned on. In this case, the pad rotates immediately when the start lever is depressed, and in the case of a self-propelled type, the wheels suddenly rotate and start running, so erroneous operation such as erroneously operating the steering wheel or mistakenly switching the switch If you accidentally touch the starting lever while the power switch is on, the motor will suddenly drive to rotate the pad or run the cleaner. Therefore, there was a very dangerous and safety problem.

Accordingly, the technical problem of the present invention is to provide a safety device designed to prevent the motor from being driven only by turning the start lever even when the power switch is turned on, thereby making the floor cleaning machine safe. In addition, it is to enable driving with good operability.

[0005]

Means taken by the present invention to solve the above technical problems are as follows. When the start lever attached to the operation box is turned,
In the floor cleaning machine configured such that the limit switch is turned on and the motor is driven to rotate, and the cleaning machine starts cleaning the floor.

(1) The start lever is rotatably mounted on each of the left and right sides of the operation box so that the limit switch of the motor can be turned on by turning either the left or right start lever. At the same time, a traction spring is provided between the locking pins attached to the root end of each starting lever, and a traction spring that acts to always pull back both starting levers is provided. A plate that locks the locking pins into the left and right locking holes to restrain the rotation of each starting lever, and when pressed and bent, releases the locking holes from the locking pins to enable the rotation of the starting lever. Attach a spring safety stopper.

(2) After the safety stopper is pushed and bent to remove the locking hole from the locking pin, when the starting lever is rotated, the tip of the locking pin released from the locking hole is placed on the inner surface of the safety stopper. The safety stopper is supported so as to be pressed and bent against the restoring force of the spring, and the tip of the locking pin is pointed in a conical or spherical shape.

(3) The respective mounting shafts, which rotatably support the left and right starting levers on the operation box side, are movably fitted respectively into elongated holes formed in the operation box side in a horizontally long state, and Between these two mounting shafts, there should be interposed a compression spring which always repels both mounting shafts in opposite directions.

[0009]

The above means operates as follows. In the element (1), since the limit switch of the motor is turned on even when the start lever is rotated left or right, the motor is turned on by operating one of the start levers, and the cleaner is a floor cleaning machine. In the case of, the cleaning pad rotates at a high speed to clean the floor, and in the case of a floor polisher, the polishing pad rotates at a high speed and polishes the floor, and in the case of a vacuum cleaner Can rotate the cleaning brush to perform various cleaning operations to sweep dust, and in the case of a self-propelled cleaning machine, it can rotate the wheels to clean the floor surface while traveling, but always The safety stopper engages the locking pins of both start levers with the lock holes to prevent the rotation of both start levers, so even if the start lever is gripped or accidentally touched, The starting lever will not rotate unless you push and bend to disengage Therefore, it is necessary to release the lock of the starting lever by pressing and bending the safety stopper each time the operation is performed, so that careless rotation of the motor can be prevented and the cleaner can be operated safely. .

In the element (2), when the safety stopper is unlocked and one of the right and left start levers is turned, the motor is driven to perform the cleaning operation. At this time, the turning operation is performed. Since the locking pin of the starting lever keeps the state in which the safety stopper is pressed and bent, that is, in the unlocked state, if the other starting lever that is not rotating in the same state is grasped, the locking pin is locked. In combination with the pointed tip, the other starting lever can be smoothly rotated without being locked by the safety stopper. The cleaning operation can be continued by freely transferring to the left or right hand.

The element (3) is characterized in that when the starting lever is grasped without releasing the lock of the safety stopper, the mounting shaft supporting the starting lever is axially compressed while compressing the compression spring along the elongated hole. Since the starting lever is moved and released, it is possible to prevent the starting lever from being damaged by forcible turning. As described above, the technical problems described above can be solved by the above means, and the problems of the conventional technology can be solved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the safety device for a floor cleaning machine according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing an example of a floor washer provided with a safety device according to the present invention. The floor washer generally denoted by reference numeral 1 has a motor (not shown) therein. The loaded body 2, running wheels 3, and dust scattering prevention protective cover 4.
And a pad (not shown) which is rotated at a high speed by the motor described above to clean the floor surface, and a tank 5 for supplying a cleaning liquid to the ground surface of the pad via a hose 5a.

A frame pipe 2a at the rear of the body 2
On the upper end of the handle pipe 6, driving handle bars 7L, 7 are provided on both left and right sides.
R and a starting lever 8 for starting the motor described above.
L and 8R are mounted on the operation box 7, and when one of these starting levers 8L and 8R is gripped and rotated, one of the left and right limit switches 16 and 16 mounted inside the operation box 7 is operated. (See FIG. 3 and FIG. 4) is turned on to form a mechanism for driving the motor.

Although FIG. 1 shows a walking hand-operated type floor cleaning machine as a cleaning machine, this is an example of an embodiment, and is, for example, a floor polishing machine or a floor cleaning machine. As described above, the cleaning device may be a self-propelled walking-type cleaning device that runs by rotating the wheels 3 with a motor, as described above.

FIG. 2 is an enlarged sectional view taken along line XX in FIG. 1, and FIGS. 3 and 4 are front views showing the internal structure of the operation box 7. In these drawings, 8a and 8a are the root ends of the left and right starting levers 8L and 8R inserted inside the left and right sides of the operation box 7, and 8b and 8b are the root ends of the starting levers 8L and 8R. Part 8
frame plate 1 in which a and 8a are mounted in operation box 7
Reference numeral 1 denotes a mounting shaft rotatably supported, and these mounting shafts 8b, 8b are movably fitted into elongated holes 7a, 7a formed in the frame plate 11 in a horizontally long manner. Normally, it is pressed in the opposite direction due to the resilience of the compression spring 14 interposed between the spring retainers 13 attached to the both attachment shafts 8b, ie, toward the outer ends of the long holes 7a. Have been moved.

Also, 8c and 8c are the two starting levers 8 similarly.
L, 8R are locking pins attached to the root ends 8a, 8a. Between these locking pins 8c, 8c, the two starting levers 8L, 8R are pulled back to the starting position shown in FIG. A towing spring 15 that exerts a towing action is stretched, and the tips 8c1 of the locking pins 8c, 8c protrude to the back side through the starting levers 8L, 8R as shown in FIGS. Further, each tip 8c1 is pointed in a conical or spherical shape as shown in FIG. The resilient force of the compression spring 14 is configured to be stronger than the traction force of the traction spring 15.

The right and left limit switches 16, 16 mounted on the frame plate 11 of the operation box 7 are shown in FIGS.
As shown in the figure, the actuators 16a, 16a are elastically pressed against the respective heads of the locking pins 8c, 8c of the above-mentioned starting levers 8L, 8R to keep the switches 16, 16 in the off state. For example, when the right start lever 8R is squeezed upward and rotated as shown in FIG.
Because the whole is rotated counterclockwise in the drawing with the mounting shaft 8b as a fulcrum, the locking pin 8c moves and turns to release the pressing on the actuator 16a, so the right limit switch 16 is turned on. When the start lever 8L on the left side of the drawing is grasped upward and turned, the left limit switch 1
6 turns on to drive the motor.

Next, in each of the figures shown in FIGS. 1 to 7, reference numeral 10 designates a generally L-shaped member formed by using a leaf spring, and the front end of which is formed through a window hole 7b. It protrudes to the front side, the root end is inserted between the left and right starting levers 8L, 8R, along the back side of the frame plate 11, and the lower end 10a side is fixed to the frame plate 11 with screws 12. 5 and 6, locking portions for fitting the tips 8 c 1, 8 c 1 of the locking pins 8 c, 8 c described above into portions that are substantially T-shaped projecting on the right and left sides thereof as shown in FIGS. 5 and 6. Holes 10b, 10b are drilled, and this locking hole 1
Unless the locking pins 8c, 8c are removed from 0b, 10b,
The starting levers 8L and 8R are configured not to rotate. In the figure, 9 is the limit switch 16 described above,
This is a lead wire connecting between the motor 16 and the motor.

Since the safety device for a floor cleaning machine according to the present invention has the above-described configuration, even if the starting lever 8L or 8R is gripped and turned without releasing the lock of the safety stopper 10, the safety device can be used. Stop pins 8c, 8c are engaged with locking holes 10b, 10
b, the rotation of the starting levers 8L, 8R is inhibited, so that the limit switches 16, 16 cannot be turned on to rotate the motor. In this locked state, additional force is applied to start the motor. When the levers 8L and 8R are to be turned, the mounting shaft 8b of the starting lever (left lever 8L in the drawing) to which a force is applied as shown in FIG. To move and release the pressure,
The starting levers 8L and 8R can be prevented from being damaged by excessive pressurization.

When the limit switch 16 is turned on and the motor is driven, the safety stopper 10 is bent obliquely upward against the elasticity of the leaf spring as shown in FIG.
If the b is removed from the tip 8c1 of the locking pin 8c, the start lever 8L or 8R can be freely gripped and turned to turn on each of the limit switches 16 and 16. However, when the start lever 8L or 8R is turned. In this case, since the elastic force of the compression spring 14 is configured to be stronger than the traction force of the traction spring 15, the rotation of the starting lever 8L or 8R is
b is smoothly moved without moving inward along the long hole 7a, and the limit switch 16 can be reliably turned on.

In the on state, the locking pin 8c of the rotated starting lever 8L or 8R is engaged with the locking hole 1 as shown in FIG.
0b and moves in the lateral direction, and its tip 8c1
Is pressed against the inner surface of the bent safety stopper 10 to keep the safety stopper 10 in a bent state, unless the hand of the gripping lever 8L or 8R is released and returned. State (unlocked state)
Is maintained as it is, and the user changes his / her hand during operation, for example, by turning one of the starting levers 8L during rotation into the other starting lever 8R.
When the rotation of the motor is to be continued and the rotation of the motor is continued, the safety stopper 10 is maintained in the pushing and bending state. It is possible to smoothly switch and rotate without locking the tip 8c1 of the locking pin 8c in the locking hole 10b.

To stop the rotation of the motor, release the gripping lever 8L or 8R.
L and 8R receive the traction action of the traction spring 15 and return to the original starting position. At the same time, the tips 8c1 of the locking pins 8c are engaged with the locking holes 10b and 10b of the safety stopper 10. Again, the locking pins 8c, 8c press the actuators 16a, 16a again, and the limit switches 1
6, 16 can be turned off and the motor can be stopped.

[0023]

[Effect of the Invention] The safety device for a floor cleaning machine according to the present invention is as described above. Neither the right or left starting lever can rotate unless the safety stopper is unlocked. In addition to various accidents caused by holding the starting lever, that is, accidents such as collisions caused by the sudden rotation of the pad or the sudden rotation of the wheels to start running can be prevented beforehand,
The operation of the starting lever during driving can be easily and smoothly transferred to the left or right hand without switching the safety stopper, so when driving for a long time or performing another work with one hand, etc. It is very convenient and can improve work efficiency.In addition, even when the start lever is forcibly squeezed and rotated with the safety stopper locked, the mounting shaft is moved to prevent damage to the start lever and the safety stopper The present invention can exhibit the advantages that can be achieved, and is extremely practical when applied to various floor cleaning machines that operate using a motor as a drive source.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a floor washer implementing a safety device according to the present invention.

FIG. 2 is an enlarged sectional view taken along line XX of FIG.

FIG. 3 is a partially cutaway configuration view showing the internal structure on the front side of the operation box, which is a main part of the present invention, as viewed from the direction of arrow A in FIG. 2;

FIG. 4 is a partially cut-away configuration view showing the internal structure on the front side of the operation box when the starting lever is turned and the limit switch is turned on, as viewed in the direction of A in FIG. 2;

5 is a configuration diagram showing the internal structure on the back side of the operation box from the direction of B in FIG. 2;

6 is a configuration diagram showing the internal structure on the back side of the operation box when the starting lever is rotated, as viewed from the direction B in FIG. 2;

FIG. 7 is a side view illustrating a state in which the safety stopper is pushed and bent.

FIG. 8 shows the internal structure on the front side of the operation box when the starting lever is turned without releasing the lock of the safety stopper.
FIG. 2 is a partially cutaway configuration view shown from the A direction.

[Explanation of symbols]

 2 Body 3 Wheel 6 Handle pipe 7 Operation box 7L, 7R Handle rod 8L, 8R Starting lever 8a Root end 8b Mounting shaft 8c Locking pin 8c1 Sharpened tip 10 Safety stopper 10b Locking hole 11 Frame plate 14 Compression spring 15 Towing spring 16 Limit switch

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Eiji Nagayama 8123 Kiga, Hosoe-cho, Husa-gun, Shizuoka Prefecture Inside the Hosoe Office of Amano Corporation (56) References JP-A-2-291829 (JP, A) -16035 (JP, U) Japanese Utility Model 60-148369 (JP, U) Japanese Utility Model 63-139858 (JP, U) Japanese Utility Model Utility Model 2-112241 (JP, U) Japanese Utility Model 62-65941 (JP, Y2) ) Jingu Hei 3-27100 (JP, Y2)

Claims (3)

(57) [Scope of request for utility model registration] When a start lever attached to an operation box is rotated, a limit switch is turned on, a motor is driven to rotate, and a cleaner starts cleaning the floor. In this case, the start lever is rotatably mounted on the left and right sides of the operation box so that the limit switch of the motor can be turned on by turning either the left or right start lever. Between the locking pins attached to the root end side of each starting lever, a traction spring that works in the direction in which both starting levers are always pulled back is stretched, and the operating box is provided with each of the locking pins described above. Are inserted into the left and right locking holes to stop the rotation of each starting lever, and when pressed and bent, release the locking holes from the locking pins to enable the turning operation of the starting lever. Safety stopper installed A safety device for a floor cleaner. 2. After the safety stopper is pushed and bent to remove the locking hole from the locking pin, when the start lever is rotated, the tip of the locking pin released from the locking hole abuts the inner surface of the safety stopper. 2. The device according to claim 1, wherein the safety stopper is supported so as to be pressed and bent against the restoring force of the spring, and the tip of the locking pin is pointed conically or spherically. The safety device for a floor cleaner according to the above. 3. Each of the mounting shafts rotatably supporting the left and right starting levers on the operation box side is movably fitted into an elongated hole formed in the operation box side in a horizontally long state, respectively. 2. A safety device for a floor cleaning machine according to claim 1, wherein a compression spring is provided between said two mounting shafts so as to always repel the two mounting shafts in opposite directions.