JP2010075529A - Device for connection of squeegee used for floor washer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for connection of a squeegee used for a floor washer, which prevents the damage of the squeegee, a wall surface, or the like by absorbing an impact on the squeegee even if the squeegee contacts the wall surface, an obstacle, or the like during the traveling of the floor washer and is devised so as to demonstrate stable water absorption performance without making the adjusting even if the height adjustment of the squeegee is needed by the causes of the wear of a traveling wheel and the cleansing of the rugged floor. <P>SOLUTION: The back part of the car body 1 of the floor washer and the squeegee 10 are connected using connecting bars 20, which are elastic and have universal joints 21 and 21 in both-end linking parts, and a centering mechanism, which consists of a tensile spring 23 and a spring lever 22, is established in the connecting bar 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention belongs to the technical field of a floor cleaning machine (scrubber) that cleans a floor surface by rotating a cleaning brush or a pad while traveling, and specifically after being cleaned by a cleaning brush or the like. The present invention relates to a squeegee connecting device that connects between a squeegee that sucks and collects sewage remaining on a floor surface into a sewage tank and a vehicle body side of the floor cleaning machine.

For example, as shown in Patent Document 1, for example, a squeegee that sucks sewage remaining on the floor after cleaning and collects it in a sewage tank is connected to a conventional general floor cleaning machine. The squeegee moves while rotating in the horizontal direction with the connecting shaft as a fulcrum according to the running of the floor cleaning machine, and sucks up the sewage on the floor.
JP-A-9-94207

  However, the squeegee connecting device used in the conventional floor cleaning machine has the following problems.

(1) Problems when the squeegee comes into contact with the wall or obstacles;
In the conventional squeegee coupling device, when the squeegee comes into contact with a wall surface or an obstacle during traveling, the coupling rod that couples the squeegee and the vehicle body has no means for absorbing the impact, so the impact is directly transmitted to the squeegee. Problems such as damage to the wall and damage to the wall occurred.
For this reason, the conventional floor cleaning machine added reinforcement or increased strength to the squeegee, but if these measures were taken, the mass of the squeegee would become very heavy, making it difficult to handle during user maintenance. There was a voice of dissatisfaction.

(2) Problems when running wheels are worn;
Normally, the floor cleaner has a heavy mass, and the running wheel wears in proportion to the distance traveled, so the squeegee tilts forward and the squeegee rubber wears abnormally and sewage is left behind. . In particular, in the case of a boarding type floor cleaning machine, since the mass is as heavy as several hundred kg, a load is applied to the wheel, and tire wear tends to be remarkable. For this reason, conventionally, a squeegee height adjustment mechanism is provided at the squeegee connecting portion, and the user adjusts the height of the squeegee when abnormal wear of the squeegee rubber or sewage spillage occurs.
However, since the user is unfamiliar with the adjustment, it is difficult to make an appropriate adjustment, and it is troublesome and troublesome. Therefore, due to poor squeegee rubber height adjustment, abnormal wear due to one piece of squeegee rubber occurs and the service life is shortened, or a gap is created between the squeegee rubber and the floor surface, so that sufficient suction performance cannot be secured, and sewage water Still remained on the floor.

(3) Problems when cleaning rough floors;
If the floor surface is flat, the squeegee rubber always maintains the proper contact angle with the floor surface, so there is no effect on the sewage suction performance. There was a problem that the proper contact angle with the floor surface could not be maintained, the sewage suction performance was lowered, and the sewage remained on the floor surface. Incidentally, it is known that the proper contact angle of the squeegee rubber can maintain a stable water absorption performance when the rubber tip is in contact with the floor surface at about 45 degrees when viewed from the side.

  Therefore, the technical problem of the present invention is to absorb the impact on the squeegee even if the squeegee comes into contact with the wall surface or obstacles while the floor cleaning machine is running, and prevent damage to the squeegee and the wall surface. Even if it is necessary to adjust the height of the squeegee due to the wear of the running wheels and the cleaning of the floor with many undulations, the squeegee for the floor cleaning machine has been devised to provide stable water absorption performance without adjustment. It is to provide a coupling device.

(1) In order to solve the above technical problem, a squeegee coupling device for a floor cleaning machine according to claim 1 of the present invention cleans the floor surface by rotating a cleaning brush or a pad while supplying cleaning water. In a floor cleaning machine configured to suck up sewage remaining on the floor after cleaning with a squeegee connected to the rear of the vehicle body of the cleaning machine and collect it in the sewage tank, the squeegee is disposed between the rear of the vehicle body and the squeegee. Stretchable structure that expands in the longitudinal direction when a certain load is applied to the side, and contracts to the original length when this load is released, and is provided with a universal joint that can be rotated in any direction at both ends. And a centering function for supporting the connecting rod in a neutral position with respect to the vehicle body of the washing machine.

(2) Moreover, the squeegee connecting device for a floor cleaning machine according to claim 2 of the present invention includes an elastic member that is pulled back when the connecting rod extends in the longitudinal direction on the connecting rod configured to be stretchable and an impact. It is characterized in that a buffer mechanism for relaxing is provided.

(3) Further, in the squeegee coupling device for a floor cleaning machine according to claim 3 of the present invention, the centering function is constituted by a pair of left and right tension springs that urge the rotation of the coupling rod toward one side. It is characterized by being.

(4) Further, in the squeegee connecting device for a floor cleaning machine according to claim 4 of the present invention, two connecting rods for connecting the rear part of the vehicle body of the cleaning machine and the squeegee are provided side by side. The left and right tension springs are individually attached to two connecting rods.

(5) Moreover, the squeegee connecting device for a floor cleaning machine according to claim 5 of the present invention is a vehicle body of the cleaning machine among universal joints provided at both ends of the two connecting bars arranged side by side. A spring lever is attached to each of the universal joints attached to the rear side, and one end of each of the pair of left and right tension springs that urges each of these spring levers against rotation in one direction of the connecting rod. It is characterized by having attached.

(6) Furthermore, the squeegee coupling device for a floor cleaning machine according to claim 6 of the present invention is characterized in that squeegee rollers that rotate while following the floor surface when the squeegee moves are provided on both the front and rear sides of the squeegee. It is said.

  As a result of the above configuration, according to the means according to claims 1 and 2 described in the above (1) and (2), the squeegee comes into contact with the wall surface and the obstacle while traveling and a certain load is applied. Even so, the expansion and contraction function and buffering function of the connecting rod that connects the squeegee and the vehicle body can alleviate the impact the squeegee receives, thus preventing problems such as squeegee damage and wall damage. It becomes.

  Moreover, according to each means concerning Claim 1, 3, 5 described in said (1), (3), (5), the universal joint of both ends of a connecting rod also in the floor surface with much wear and undulation of a running wheel By swinging up and down, it is possible to keep the squeegee always in proper condition with the floor surface, and furthermore, a centering function consisting of a pair of left and right tension springs is provided between the connecting rod and the vehicle body. Even when the posture of the squeegee is biased, the posture of the squeegee returns to the neutral position with respect to the vehicle body.

  According to the means according to claims 4 and 5 described in the above (4) and (5), since the squeegee is connected by the four-bar parallel link, the posture of the squeegee is not biased with respect to the traveling direction when moving forward, Even when the vehicle is moving backward, it does not tilt to one side due to friction with the floor surface, and can always maintain a neutral position. In addition, the squeegee keeps a proper posture as much as possible and does not tilt greatly, so that it is possible to reliably suck up the sewage on the floor surface.

  Further, according to the means according to claim 5 described in the above (5), even if the posture is biased or inclined due to the squeegee coming into contact with the wall surface or an obstacle during traveling, it is attached to the left and right spring levers. Due to the tension spring, the squeegee can change its position from side to side only when a certain load is applied, and then return the squeegee to the neutral position reliably. Thus, the posture of the squeegee is further stabilized, and the sewage suction action by the squeegee can be further stabilized.

  According to the means according to claim 6 described in the above (6), the squeegee roller attached to the squeegee stabilizes without tilting the squeegee, and the squeegee follows the floor surface while tracing the floor surface. Even on a floor with many irregularities, it is possible to maintain a proper contact angle and prevent sewage from being left behind.

  As described above, according to the squeegee connecting device for a floor cleaning machine according to the present invention, even when the squeegee comes into contact with a wall surface or an obstacle during traveling, the squeegee breaks down due to the structure that reduces the impact received. In addition, the squeegee's posture can be quickly returned to the neutral position by the centering mechanism, so there is little sewage left on the floor surface and an excellent sewage suction effect. It can be demonstrated.

  Furthermore, in the present invention, even when the traveling wheel is worn or when the floor surface with many undulations is washed, the squeegee rubber always maintains an appropriate contact angle with the floor surface, so that dirty water may remain on the floor surface. The squeegee rubber height adjustment mechanism does not exist (no adjustment), and it is extremely easy to use. In addition, the structure that reduces the impact is more than necessary. Since there is no need to increase the strength, the number of components is reduced, and the economy can be provided at a relatively low cost.

  Hereinafter, the embodiment of the squeegee connecting device for a floor cleaning machine according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing the configuration of the floor cleaning machine in which the present invention is implemented. In the figure, reference numeral 1 denotes a vehicle body of a floor cleaning machine, 2A and 2B are front and rear wheels for traveling, and 3 is a cleaning brush that is rotated by a motor (not shown). Reference numeral 4 denotes a brush cover that covers the periphery of the cleaning brush 3. Reference numeral 10 generally denotes a squeegee connected to the rear portion of the vehicle body 1.

  FIG. 2 is a rear view illustrating the configuration of the floor cleaning machine in which the squeegee coupling device according to the present invention is implemented. In the figure, reference numeral 5 denotes a suction hose for connecting the squeegee 10 and a sewage tank (not shown), 11. Indicates a connection port for connecting the lower end port of the suction hose 5 protruding from the center of the upper surface of the squeegee 10.

  In addition, the squeegee 10 sucks sewage on the floor surface FR by applying a suction action of a suction blower (not shown) sent through the suction hose 5 connected to the connection port 11 to the sewage tank. The connecting device according to the present invention is for connecting the squeegee 10 to the rear side of the vehicle body 1.

  FIG. 3 shows a detailed view of the squeegee 10 and the periphery of the connecting rod constituting the connecting device according to the present invention. The squeegee 10 has an elongated cover body (shown in the figure) with an open portion facing downward. The inner and outer squeegee rubbers 12A and 12B, which are restrained by a supporter (not shown), are attached to the connection port 11 projecting from the upper surface through the cover body. By connecting the lower end opening of the suction hose 5 described above, the suction force of the blower is exerted between the squeegee rubbers 12A and 12B of the squeegee 10, and the sewage after brush cleaning is sucked and collected in the sewage tank. Has been.

  A reinforcing plate 10X is attached to the upper part of the cover body. Also, near the center of the upper surface of the plate 10X, a U-shaped handle 13 formed so that the operator can hold the squeegee 10, and the squeegee 10 is removed during storage. The hook 14 for hanging is attached so that it can be hooked on the Furthermore, one guide roller 15 is attached to each of both ends of the upper surface of the plate 10X.

The guide rollers 15 and 15 at both ends of the squeegee 10 are rollers that protect both when the squeegee 10 comes into contact with a wall surface or an obstacle. Furthermore, U-shaped squeegee roller frames 16 and 16 are attached inside the guide rollers 15 and 15 so as to straddle the upper surface of the plate 10X.

  Further, one squeegee roller 17 is attached to each squeegee roller frame 16, 16 at the front and rear of the squeegee 10 so as to be rotatable by a squeegee roller shaft 17T. As the rollers 17 rotate while tracing the floor surface FR, the posture of the squeegee 10 is stably supported without being inclined with respect to the floor surface FR. The squeegee connecting plate 18 is fastened to the lower portion of the plate 10X by two squeegee connecting plate fixing knob bolts 19, 19.

  As shown in FIGS. 3 and 5, the left and right connecting rods 20, 20 connected in parallel in the vicinity of the center of the squeegee 10 are provided between the squeegee connecting plate 18 and the vehicle body connecting plate 1 </ b> Z. Universal joints 21 are attached to both ends (connection portions between the squeegee connection plate 18 and the vehicle body connection plate 1Z). Between the vehicle body connecting plate 1Z and the universal joints 21 and 21 of both the connecting rods 20 and 20, spring levers 22 and 22 are mounted on the universal joint mounting shafts 21W and 21W, which will be described later, as shown in FIGS. It is pivotally attached. The spring levers 22 and 22 are positioned inside the connecting rods 20 and 20 and are provided at the front ends 22T and 22T formed by bending one end upward and the side surfaces of the vehicle body chassis 1K and 1K. Centering tension springs 23 and 23 are respectively mounted between the spring hook mounting plates 1R and 1R. Further, cylindrical stopper portions 22H and 22H for the spring levers 22 and 22 are attached to the vehicle body connecting plate 1Z.

  As shown in FIG. 5, in the state where the squeegee 10 is in the neutral position, the spring levers 22 and 22 are pulled by applying a loose tension that does not cause the tension springs 23 and 23 to come off, and come into contact with the stopper portions 22H and 22H, respectively. ing. The vehicle body connecting plate 1Z described above is fixed by bolts between the lower body chassis 1K and 1K as shown in FIG.

  4 (1) is a perspective view of the connecting rod 20 described above, (2) is a cross-sectional view thereof, (3) is a cross-sectional view showing an extended state, and is connected in the perspective view of FIG. 4 (1). The rod 20 includes a pipe 20P that forms the outer side of the main body, and universal joints 21 and 21 are fastened to the both ends by nuts 21N and 21N, respectively, and project from the bottom surfaces of the universal joints 21 and 21. The respective attachment shafts 21W and 21W are fixed to the squeegee connecting plate 18 and the vehicle body connecting plate 1Z described above. 4 (2), the connecting rod 20 includes a shaft 20K penetrating the inside of the pipe 20P, and a shock absorber (shown as a compression spring 20S in the figure) built in the outside of the shaft 20K. Resin washers 20W and 20W attached to both ends of the compression spring 20S and excellent in slidability, snap rings 20E and 20F (stop rings) attached to the outside of the resin washers 20W and 20W, and free at both ends The ball portions 21R, 21R formed by the nuts 21N, 21N for fixing the joints 21, 21 are formed at the upper ends of the mounting shafts 21W, 21W described above, and are rotatable inside the universal joints 21, 21. That is, it is fitted so as to be rotatable in both the vertical and horizontal directions.

  In the cross-sectional view of FIG. 4 (2), a snap ring 20E (retaining ring) is fitted in the groove cut at the tip of the shaft 20K on the inner surface of the pipe 20P on the vehicle body side (left side in the figure), so that the resin washer 20W is fitted. And one end of the compression spring 20S is stopped. On the squeegee side (right side in the figure), a groove is cut in the inner surface of the pipe 20P, and the other end of the resin washer 20W and the compression spring 20S is stopped by fitting a snap ring 20F (retaining ring) into the groove. ing. On the other hand, from the end surface of the pipe 20P on the vehicle body side (left side in the figure), a connecting pin 21X having a male screw 21B cut out is welded to the pipe 20P and is fitted to the inner peripheral surface of the universal joint 21. The screw 21A is cut and fastened to the shaft 20K via a nut 21N. A rotatable metal hollow collar 21C is placed on the base peripheral surface of the connecting pin 21X. When the squeegee 10 is tilted in contact with an obstacle, the obstacle-side spring lever 22 pushes the collar 21C. By sliding, it has a mechanism that allows smooth swinging.

  A shaft 20X protrudes from the end surface (right side in the drawing) of the pipe 20P on the other squeegee 10 side, and a male screw 20B is cut at the tip of the shaft 20X. Further, a female screw 21D is cut in the universal joint 21 on the right side in the drawing, and is structured to be fastened through a nut 21N.

  Next, a state diagram in which the connecting rod 20 is extended will be described with reference to FIG. That is, the extension of the connecting rod 20 indicates a state where the shaft 20K incorporated in the pipe 20P is pulled out from the pipe 20P. The shaft 20K is not tilted while being supported by the respective resin washers 20W, 20W, and is pulled out horizontally in the right direction in the drawing while contracting the compression spring 20S. The connecting rod 20 has a mechanism that extends when the squeegee 10 is caught by a partial obstacle WT and a load exceeding a certain level is applied (see FIG. 7). With the return force of 20S, the shaft 20K is pulled back into the pipe 20P to the original state of FIG. With the above structure, the connecting rod 20 expands and contracts. The shock absorber in the connecting rod 20 is exemplified by the compression spring 20S. However, it may be a shock absorber provided with a shock absorber such as a damper.

Next, a state where the squeegee 10 is in contact with an obstacle W such as a wall surface as shown in FIG. 6 or a partial obstacle WT as shown in FIG. 7 will be described.
In the conventional squeegee coupling mechanism, when the squeegee comes into contact with a wall surface or an obstacle, the squeegee rotates abruptly in the lateral direction with the connecting shaft end as a fulcrum with respect to the direction of the vehicle body. The squeegee was damaged and the wall surface was damaged by the impact of leaving the sewage water and the squeegee contacting the wall surface and obstacles. On the other hand, the squeegee coupling device of the present invention can prevent the occurrence of the above-described problems, and its configuration will be described below with reference to FIGS. 5, 6, and 7.

  FIG. 5 shows a state in a neutral position where the squeegee 11 is not in contact with a wall surface or an obstacle. FIGS. 6 and 7 show the squeegee 10 in contact with an obstacle W such as a wall surface or a partial obstacle WT. Indicates the state. That is, when the squeegee 10 contacts an obstacle W such as a wall surface, the squeegee 10 is pushed and slides laterally from the neutral position shown in FIG. 5, and the respective connecting rods 20 and 20 are inclined obliquely as shown in FIGS. However, the squeegee 10 is kept in an appropriate posture as much as possible by the two connecting rods 20 and 20, and does not tilt greatly.

  Here, the effect of the two connecting rods 20 and 20 will be described. First, as shown in FIG. 6, when the right connecting rod 20 on the obstacle W side such as a wall is inclined, the right spring lever 22 is rotated clockwise by being pushed by the collar 21C of the connecting rod 20, The right tension spring 23 on the obstacle W side extends. At this time, since the other left spring lever 22 is not pushed by the connecting rod 20, the left tension spring 23 does not extend. However, since the squeegee 10 always tries to return to the neutral position by the tension of the tension spring 23 only on the obstacle W side at this time, the return force is strong, and the posture does not tilt greatly in the state of sliding in the lateral direction. Less sewage is left on the surface FR.

  Thereafter, when the squeegee 10 avoids the obstacle W, the right spring lever 22 pushes the collar 21C of the connecting rod 20 by the tension of the left tension spring 23 on the obstacle W side, and quickly returns to the neutral position. (State in FIG. 5) The vehicle body connecting plate 1Z is provided with a stopper portion 22H of the spring lever 22. When the squeegee 10 is in the neutral position, the spring lever 22 is in contact with the stopper portion 22H. A collar 21C is placed at the base of the connecting pin 21X, and when the squeegee 10 contacts the obstacle W and slides in the lateral direction, the spring lever 22 on the right side on the obstacle W side rubs against the collar 21C, so that smooth Can be rotated. Furthermore, when the state of the floor surface FR with many undulations overlaps, the squeegee 10 swings up and down, but the spring lever 22 on the obstacle W side can be smoothly rotated by rubbing against the collar 21C. Since the collar 21C is rotatable, even if the spring lever 22 rubs against the collar 21C, it does not bite or become astringent.

FIG. 7 shows a state in which the squeegee 10 is caught by a partial obstacle WT.
As shown in FIG. 7, the posture of the squeegee 10 is inclined by being caught by a partial obstacle WT, and the right connecting rod 20 on the obstacle WT side extends. After avoiding the catch of the obstacle WT, the squeegee 10 can be quickly slid in the lateral direction and returned to the floor surface FR by the tension of the right tension spring 23 on the obstacle WT side (the state shown in FIG. 6). There is no sewage left. Conventionally, troubles such as breakage of the squeegee 10 and damage to the obstacle WT occur due to the impact that has been caught. In the present invention, it is possible to prevent the occurrence of this problem. The extended obstacle side (right side) connecting rod 20 is also returned by the compression spring 20S in the connecting rod 20 after avoiding the catch.

  In addition, if the connecting rod 20 has a buffer function, the connecting rod 20 returns more gently, so that the squeegee 10 can be prevented from being damaged. Thereafter, the squeegee 10 avoiding the obstacle W returns to the neutral position of FIG. 5 from the state of FIG. 6 by the action of the tension spring 23. From the above, the cost of the squeegee 10 can be reduced without increasing the strength of the squeegee 10 more than necessary, and the advantage of being easy to handle during user maintenance can be exhibited.

Next, the state when the traveling wheel is worn will be described.
8 is a cross-sectional side view of the periphery of the connecting rod in a state where the traveling rear wheel 2B is not worn. FIG. 9 is a cross-sectional side view of the periphery of the connecting rod in a state where the traveling rear wheel 2B is worn. FIG.

  Initially, the connecting rod 20 is attached obliquely as shown in FIG. 8, and the traveling rear wheel 2B is not worn, but the traveling rear wheel 2B gradually wears in proportion to the traveling distance. However, even when the rear wheel 2B for traveling is worn, both ends of the connecting rod 20 of the squeegee 10 are constituted by the universal joints 21 and 21, as shown in FIG. The squeegee 10 follows the state of the floor surface FR and can always maintain an appropriate contact angle with the floor surface FR.

  Further, when the squeegee 10 is moved, the squeegee roller 17 provided before and after the squeegee 10 moves the squeegee 10 while following the floor surface FR while tracing the floor surface FR. At the same time, the front of the squeegee rubber 12A bites into the floor surface FR, abnormal wear occurs, or the rear of the ski rubber 12B floats from the floor surface FR. If the height of the squeegee 10 is not adjusted, sewage is generated. It is possible to solve the problem of remaining, and the same effect as described above can be exhibited even when the floor surface FR with many undulations is cleaned.

  The above embodiment is only one of the preferred embodiments, the shock absorber of the connecting rod 20 may be a damper, and the tension spring 23 is an elastic body such as a rubber band. Alternatively, the tension spring 23 may be attached between the outside of the connecting rod 20 and the main body chassis, and any of these selections is arbitrary.

The perspective view which showed the Example of the floor surface washing machine by which the squeegee coupling device which concerns on this invention was mounted. The rear view which looked at the floor surface washing machine shown in FIG. 1 from back. The perspective view explaining the principal part of this invention in detail. (1) is the perspective view which showed the whole connecting rod used by this invention, (2) is the sectional side view, (3) is sectional drawing which showed the state which the shaft expanded. The top view which showed the principal part of this invention at the time of a straight drive. The top view which showed the principal part of this invention in case one end of a squeegee touches obstructions, such as a wall surface. The top view which showed the principal part of this invention in the state in which the end of the squeegee was caught in the partial obstruction. The sectional side view explaining the composition of the connecting rod periphery part in the state where the rear wheel for running is not worn. The sectional side view explaining the composition of the connecting rod peripheral part in the state where the rear wheel for running was worn.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body of floor cleaning machine 1Z Car body connecting plate 2A, 2B Driving front wheel and rear wheel 3 Cleaning brush 5 Suction hose 10 Squeegee 12A, 12B Squeegee rubber 15 Guide roller 17 Squeegee roller 18 Squeegee connecting plate 20 Connecting rod 20K Shaft 20S Compression Spring 20P Pipe 21 Universal joint 21C Color
22 Spring lever 22H Stopper 23 Tension spring FR Floor surface W Wall surface obstacle WT Partial obstacle

Claims (6)

The cleaning brush or pad is rotated while supplying cleaning water to clean the floor, and after cleaning, the sewage remaining on the floor is sucked up by a squeegee connected to the rear of the body of the cleaning machine and collected in the sewage tank. Floor cleaning machine
A stretchable structure that stretches in the longitudinal direction when a load above the squeegee is applied to the squeegee side and contracts to the original length when the load is released. And a centering function for supporting the connecting rod in a neutral position with respect to the vehicle body of the washing machine. Squeegee coupling device for floor cleaning machines.   2. The floor according to claim 1, wherein the connecting rod configured to be stretchable includes an elastic member that is pulled back when the connecting rod extends in the longitudinal direction, and a buffer mechanism for reducing an impact. Connecting device for squeegee.   3. The squeegee connection for a floor cleaning machine according to claim 1, wherein the centering function is constituted by a pair of left and right tension springs that urges the connection rod to rotate toward one side. 4. apparatus.   Two connecting rods for connecting the rear portion of the vehicle body of the washing machine and the squeegee are provided side by side, and the left and right tension springs are individually attached to the two left and right connecting rods. The squeegee coupling device for a floor cleaning machine according to claim 1, 2, or 3.   A spring lever is attached to each of the universal joints attached to the rear side of the vehicle body of the washing machine among the universal joints provided at both ends of the two connecting rods arranged side by side. 5. The squeegee coupling device for a floor cleaning machine according to claim 4, wherein one end of each of a pair of left and right tension springs that urges the coupling rod to rotate in one direction is attached.   6. The squeegee connection for a floor cleaning machine according to claim 1, wherein squeegee rollers are provided on both the front and rear sides of the squeegee to rotate while following the floor surface during movement of the squeegee. apparatus.

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