JPH0531760U - Safety device for floor cleaner - Google Patents

Abstract

(57) [Summary] [Purpose] The motor of the floor cleaning machine should not rotate even if the starting lever is rotated unless the safety stopper is unlocked. [Structure] When the starting lever 8L or 8R is gripped and rotated,
In a floor cleaning machine configured so that the limit switch 16 is turned on and the motor of the cleaning machine is driven, the starting pin is normally engaged with the locking pins 8c of the starting levers 8L and 8R. When the rotation of 8L and 8R is stopped and pushed and bent, the locking hole 10b is removed from the locking pin 8c and the starting lever 8
Safety stopper 1 made of leaf spring that enables rotation of L and 8R
Set 0.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is to clean a floor surface by rotating a cleaning pad with a motor and, if necessary, rotating wheels to clean the floor surface, or to clean or polish the floor surface. The present invention relates to a safety device that is used in the technical field of a cleaning device (hereinafter, simply referred to as a floor cleaning device), and is specifically suitable for a starting lever of the floor cleaning device.

[0002]

[Prior Art]

 A conventional floor cleaning machine that cleans the floor while running by rotating a pad with a motor is, for example, an upper end of a handle pipe provided at the rear of the machine body as seen in the application of Japanese Patent Application No. 1-222391. Attach the operating box to the operating box, attach the handle rod and the starting lever (operating lever) to the left and right sides of the operating box, turn on the power switch, and then grasp either the starting lever upward to rotate it. The limit switch attached to the inside of the operation box is turned on and the motor is driven, and the cleaning pad is rotated at high speed to clean and polish the floor surface, and a relatively large self-propelled walker. In the case of a cleaning floor cleaner, the above motor rotates both the pad and the wheel as necessary to clean the floor while the cleaner is running.

[0003]

[Problems to be solved by the device]

 However, in the conventional floor cleaning machine configured as described above, since the safety device (lock device) is not provided at the starting lever part, when the power switch is turned on, if the starting lever is grasped, The pad rotates instantly, and in the case of the self-propelled type, the wheels suddenly rotate and start traveling, so there is a problem that erroneously causes an incorrect operation such as mistaken steering wheel operation or wrong switch operation. Also, if you accidentally touch the starter lever while the power switch is still turned on, the motor will suddenly rotate, causing the pad to rotate and the cleaner to run, which is extremely dangerous. There was a problem with safety.

Therefore, the technical problem of the present invention is to install a safety device devised so that the motor does not drive only by turning the starting lever even if the power switch is turned on, to make the floor cleaning machine safe. Moreover, it is to be able to operate with good operability.

[0005]

[Means for Solving the Problems]

 Means taken in the present invention to solve the above technical problems are as follows. When the start lever attached to the operation box is rotated, the limit switch turns on and the motor drives and rotates, so that the cleaning machine starts cleaning the floor surface.

(1) The start levers are rotatably attached to both the left and right sides of the operation box so that the limit switch of the motor can be turned on by rotating either the left or right start lever. In addition to the above, a pulling spring that acts to always pull back both start levers is stretched between the locking pins attached to the root end side of each start lever. , The above locking pins are fitted into the left and right locking holes to stop the rotation of each starting lever, and when pushed and bent, the above locking holes are removed from the locking pins to allow the rotation operation of the starting lever. Install a leaf spring safety stopper that enables it.

(2) When the safety stopper is pushed and bent to remove the locking hole from the locking pin, and then the starting lever is rotated, the tip of the locking pin removed from the locking hole comes to the inner surface of the safety stopper. The safety stopper should be configured to support the spring in a bent state against the restoring force of the spring, and the tip of the locking pin should be pointed conically or spherically.

(3) The respective mounting shafts in which the left and right starting levers are rotatably supported on the operation box side are movably fitted into the oblong holes bored horizontally on the operation box side, respectively, and Between these two mounting shafts, insert a compression spring that elastically springs both mounting shafts in opposite directions.

[0009]

[Operation] The above means operates as follows. In the element of (1) above, the limit switch of the motor is turned on regardless of which of the left and right start levers is rotated. Therefore, if any of the start levers is operated, the motor is turned on and the cleaner is placed on the floor. In the case of a washing machine, the cleaning pad rotates at high speed to clean the floor surface, and in the case of a floor polishing machine, the polishing pad rotates at high speed to polish the floor surface, and further cleaning In the case of a machine, various cleaning work can be performed by rotating the cleaning brush to sweep out dust, and in the case of a self-propelled cleaning machine, the wheels can be rotated to clean the floor surface while traveling. However, since the safety stopper normally engages the lock pins of both start levers with the lock holes to prevent the rotation of both start levers, the start lever was grasped or the start lever was accidentally touched. However, the start lever will not rotate unless the safety stopper is pushed and bent to disengage. Therefore, it is necessary to push and bend the safety stopper to unlock the starter lever each time when operating, thus preventing accidental rotation of the motor and enabling safe operation of the cleaner. To do.

In the element (2), when the safety stopper is unlocked and either the left or right starting lever is rotated, the motor is driven and the cleaning machine performs the cleaning operation. Since the locking pin of the starting lever keeps the safety stopper pushed and bent, that is, the lock is released, if you hold the other starting lever that is not rotating in that state, Coupled with the pointed tip of the stop pin, the other starting lever can be rotated smoothly without being locked by the safety stopper. While driving, you can freely move it to either the left or right hand to continue the cleaning operation.

The element of the above (3) is that when the starting lever is grasped without unlocking the safety stopper, the mounting shaft supporting the starting lever is axially compressed while compressing the compression spring along the long hole. Since it is moved and released, it is possible to prevent damage due to an excessive grip and rotation of the starting lever. 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]

【Example】

 Hereinafter, a preferred embodiment of the safety device for a floor cleaner according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing an example of a floor cleaning machine equipped with a safety device according to the present invention. The floor cleaning machine generally designated by reference numeral 1 has a motor (not shown) inside. A pad (not shown) that is rotated at a high speed by the above-mentioned motor inside the airframe 2 that has been housed, wheels 3 for traveling, and a dust-scattering protection cover 4, and a pad through the hose 5a. And a tank 5 for supplying the cleaning liquid to the ground contact surface of.

A handle pipe 6 is connected to the frame pipe 2a at the rear portion of the machine body 2, and handle rods 7L and 7R for driving are provided on both left and right sides at the upper end of the handle pipe 6 and the above-mentioned motor is started. The operating box 7 having the starting levers 8L and 8R for operating is attached, and when either of the starting levers 8L and 8R is gripped and rotated, either the left or right installed inside the operating box 7 is operated. Limit switches 16 and 16 (see FIGS. 3 and 4) are turned on to drive the above motor.

In FIG. 1, a walk-behind floor cleaning machine is shown as a cleaning machine, but this is an example of implementation, and it is called, for example, a floor polisher or a floor cleaning machine. As described above, another cleaning device may be used, and as described above, a self-propelled walking type cleaning device in which the motor 3 rotates the wheels 3 to travel may be used.

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 operating box 7, and 8b and 8b are the root ends of the starting levers 8L and 8R. The mounting shafts for rotatably supporting the parts 8a, 8a on the frame plate 11 mounted in the operation box 7 are shown, and these mounting shafts 8b, 8b are bored in the frame plate 11 in a lateral direction. The compression springs 14 are movably fitted in the long holes 7a, 7a and are normally interposed between the spring retainers 13, 13 mounted on the mounting shafts 8b, 8b. Direction, that is, it is not pressed and moved in the outer end direction of each of the long holes 7a, 7a. It

Further, 8c and 8c are locking pins mounted on the root ends 8a and 8a of the starting levers 8L and 8R, respectively, and the starting lever 8L is located between these locking pins 8c and 8c. , 8R are pulled by a pulling spring 15 which exerts a pulling action for returning the pulling levers 8R to the starting position shown in FIG. 3, and the tips 8c1 of the two locking pins 8c, 8c are respectively arranged as shown in FIGS. It projects through the starting levers 8L and 8R to the back surface side, and each tip 8c1 is pointed conically or spherically as shown in FIG. The elastic force of the compression spring 14 is stronger than the traction force of the traction spring 15.

The left and right limit switches 16 and 16 attached to the frame plate 11 of the operation box 7 are provided with lock pins for both the starting levers 8L and 8R, which are the actuators 16a and 16a as shown in FIGS. 3 and 4. 8c and 8c are elastically pressed against the heads to keep the switches 16 and 16 in the off state. For example, when the right start lever 8R is gripped and rotated upward as shown in FIG. Since the entire starting lever 8R is rotated counterclockwise in the drawing about the mounting shaft 8b as a fulcrum, the locking pin 8c is moved and rotated to release the pressing force on the actuator 16a. The switch 16 can be turned on to drive the above-mentioned motor. Further, when the starting lever 8L on the left side in the drawing is gripped and turned upward, the left limit switch 16 is turned on as well. It is designed to drive the motor.

Next, in each of the drawings shown in FIGS. 1 to 7, reference numeral 10 designates an entire L-shape formed by using a leaf spring, and the tip portion of the operation box 7 is opened from the window hole 7b. It projects to the front surface side, the root end side is inserted between the left and right starting levers 8L and 8R so as to be along the back surface side of the frame plate 11, and the lower end portion 10a side thereof is fixed to the frame plate 11 with a screw 12. As shown in FIG. 5 and FIG. 6, the safety stopper is a locking member that is fitted with the tips 8c1 and 8c1 of the locking pins 8c and 8c described above at the substantially T-shaped protruding portions on both right and left sides thereof. Stop holes 10b, 10b are provided, and the starting levers 8L, 8R cannot be rotated unless the locking pins 8c, 8c are removed from the locking holes 10b, 10b. In addition, reference numeral 9 in the drawing denotes a lead wire connecting between the above-described limit switches 16 and 16 and the motor.

Since the safety device for a floor cleaning device according to the present invention has the above-described structure, it is possible to grasp the starting lever 8L or 8R without releasing the lock of the safety stopper 10 and to rotate the starting lever 8L or 8R. Also, since the locking pins 8c, 8c engage the locking holes 10b, 10b to prevent the start levers 8L, 8R from rotating, the limit switches 16, 16 can be turned on to rotate the motor. In addition, if an attempt is made to rotate the starting levers 8L and 8R by further applying a force in this locked state, the mounting shaft of the starting lever (the left lever 8L in the case of the drawing) to which a force is applied as shown in FIG. 8 is attached. Since 8b laterally moves in the elongated hole 7a while compressing the compression spring 14 to release the pressure, it is possible to prevent the starter levers 8L and 8R from being damaged by excessive pressure.

When the limit switch 16 is turned on to drive the motor, as shown in FIG. 7, the safety stopper 10 is bent obliquely upward against the elasticity of the leaf spring, and the locking hole 10b is locked by the locking pin 8c. When the start lever 8L or 8R is removed, the start lever 8L or 8R can be freely grasped and rotated to turn on the limit switches 16 and 16. However, when the start lever 8L or 8R is rotated, the compression is performed. Since the elastic force of the spring 14 is configured to be stronger than the traction force of the traction spring 15, the starting lever 8L or 8R can be smoothly rotated without moving the mounting shaft 8b inward along the elongated hole 7a. Thus, the limit switch 16 can be reliably turned on.

Further, in this ON state, the locking pin 8c of the rotated starting lever 8L or 8R moves laterally out of the locking hole 10b as shown in FIG. 6, and its tip 8c1 is pushed. In order to keep the safety stopper 10 in a bent state by hitting the inner surface of the bent safety stopper 10, the safety stopper 10 is pushed and bent (unless the hand of the grasped starting lever 8L or 8R is released and returned to its original state). (Unlocked state) is maintained as it is. Further, when the hand is changed during operation to switch one of the starting levers 8L that is rotating to the other starting lever 8R to continue the rotation of the motor, the safety stopper 10 is Since the push-bend state is maintained and the tip 8c1 of the locking pin 8c is sharpened, the starting lever 8R of the switching side is set to the tip 8c1 of the locking pin 8c in the locking hole 10b. You can smoothly switch and rotate without hooking.

Further, in order to stop the rotation of the motor, if the hand of the grasped starting lever 8L or 8R is released, each of the starting levers 8L and 8R receives the pulling action of the pulling spring 15 and returns to the original starting position, At the same time, since the tips 8c1 of the respective locking pins 8c are engaged with the respective locking holes 10b, 10b of the safety stopper 10, the respective locking pins 8c, 8c press the actuators 16a, 16a again and the respective limits are reached. The switches 16 and 16 can be turned off to stop the motor.

[0023]

[Effect of the device]

 The safety device for a floor cleaner according to the present invention is as described above, and neither the left or right starting lever can be rotated unless the safety stopper is unlocked. It is possible to prevent various accidents caused by gripping, immediately such as collisions caused by sudden rotation of pads or sudden rotation of wheels to start traveling, and at the same time while driving. Since the operation of the starting lever can be easily and smoothly transferred to either the left or right hand without switching the safety stopper, it can be used for a long time or when performing another work with one hand. It is extremely convenient and can improve work efficiency.In addition, even if the starting lever is forcibly grasped and rotated while the safety stopper is locked, the mounting shaft is moved to move the starting lever or safety stopper. Be one that can exhibit the advantage of damage can be prevented, it is to Makoto implemented in various floor cleaning machine operating as Dogen drive motor having a high practicality.

[Brief description of drawings]

FIG. 1 is an external perspective view of a floor cleaning machine in which a safety device according to the present invention is implemented.

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

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

4 is a partially cutaway configuration diagram showing the internal structure of the front side of the operation box when the starting lever is rotated and the limit switch is turned on, as viewed from the direction A in FIG. 2. FIG.

FIG. 5 is a configuration diagram showing the internal structure of the back side of the operation box from the view B of FIG.

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

FIG. 7 is a side view illustrating a pushing and bending state of the safety stopper.

FIG. 8 shows the internal structure of the front side of the operation box when the starting lever is rotated without unlocking the safety stopper.
It is a partially broken block diagram shown from the A view.

[Explanation of symbols]

 2 Airframe 3 Wheels 6 Handle pipe 7 Operating box 7L, 7R Handle rod 8L, 8R Starting lever 8a Root end 8b Mounting shaft 8c Locking pin 8c1 Sharp tip 10 Safety stopper 10b Locking hole 11 Frame plate 14 Compression spring 15 Traction spring 16 Limit switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Eiji Nagayama 8123, Kiga, Hosoe-cho, Inasa-gun, Shizuoka Prefecture Amano Hosoe Works

Claims (3)

[Scope of utility model registration request] 1. A floor cleaning machine configured such that when a start lever attached to an operation box is rotated, a limit switch is turned on, a motor is driven and rotated, and a cleaning machine starts cleaning a floor. In this case, the start levers are rotatably attached to both the left and right sides of the operation box, and the limit switch of the motor can be turned on by rotating either the left or right start levers. A pulling spring that acts in the direction to always pull back both start levers is stretched between the lock pins attached to the root end side of each start lever, and the above-mentioned lock pins are attached to the operation box. Made of a leaf spring that fits into the left and right locking holes to stop the rotation of each starting lever, and when pushed and bent, removes the locking hole from the locking pin to enable the rotation operation of the starting lever. Having a safety stopper Safety device for floor cleaning machines. 2. The safety stopper is pushed and bent to disengage the locking hole from the locking pin, and then the starter lever is rotated to bring the tip of the locking pin out of the locking hole into contact with the inner surface of the safety stopper. The safety stopper is configured to be supported in a bent state against the restoring force of the spring, and the tip of the locking pin is pointed in a conical or spherical shape. Safety device for the floor cleaner described. 3. The mounting shafts in which the left and right starter levers are rotatably supported on the operation box side are movably fitted in the oblong holes bored horizontally on the operation box side, respectively. 2. The safety device for a floor cleaning machine according to claim 1, wherein a compression spring that elastically springs the two mounting shafts in opposite directions is interposed between the two mounting shafts.