JP2006314662A - Squeegee for floor washer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a squeegee for a floor washer with high dust collection performance, capable of improving the instable slop and dust scraping power caused by the difference of the grounding angle by eliminating the difference of the grounding state of a flexible blade according to the difference in level or unevenness of a floor surface, and improving the following capability of the flexible blade to the floor surface, the stability of the grounding angle of the flexible blade at the distal end of the squeegee to the floor surface and the following capability of a guide wheel to the squeegee. <P>SOLUTION: The whole body of the squeegee 10 for absorbing washing slops from the floor surface FL is arch-shaped, and the lower end side of a rear side flexible blade 13 constituting the squeegee 10 is bent in the direction of traveling of the squeegee 10 so that the interior angle between an edge 13T and the floor surface FL is 20°-65° when the blade 13 is grounded to the floor surface FL. A vent 11R opened on the upper surface of the center of the squeegee 10 is located on the line connecting the centers of the left and right guide wheels 16 and 16 (axles 15a and 15a). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  INDUSTRIAL APPLICABILITY The present invention is suitable for use in a floor cleaning machine (scrubber) that cleans a floor surface by rotating a pad or a rotating brush while traveling, a dedicated sewage recovery machine that recovers cleaning sewage on the floor surface while traveling, and the like. It relates to squeegees.

  The “squeegee for floor cleaning machine” described in Patent Document 1 describes a squeegee that is bent and formed into a substantially bow shape as a whole.

As described above, the squeegee formed as a whole in the shape of a bow is used to suck and collect the cleaning wastewater and dust remaining on the floor surface after the pad or the rotating brush is cleaned by collecting and collecting near the center. Compared with the conventional general squeegee that is formed linearly as a whole, it has an advantage that the washing sewage and dust can be sucked up reliably and efficiently.
JP-A-9-206263

  However, the squeegee having a substantially bow shape described in Patent Document 1 has the following drawbacks because it is formed in a bow shape.

  That is, for example, when the squeegee moves up and down due to a level difference on the floor surface or partial unevenness of the floor surface during the cleaning operation, the width of the squeegee vertical movement between the center of the squeegee and the end (both ends) of the squeegee Therefore, there is a problem that the ground contact state of the flexible blade (squeegee rubber) with respect to the floor surface is different.

  FIG. 10 shows the relationship between the height of the flexible blade (squeegee rubber) at the center and the end of a substantially bow-shaped squeegee (curved squeegee). When the squeegee reaches a stepped or uneven floor surface, an unevenness difference (h) occurs between the flexible blade X1 at the center of the squeegee and the flexible blade X2 at the end, and the flexible blade Since the contact angle between X1 and X2 is different, there is a difference in the suction force between the center and end of the squeegee, and the action of collecting cleaning sewage and dust (scratching force) is not constant, and the floor surface There was a problem that sewage leaked from the suction.

  In addition, since the flexible blade used in the squeegee described in Patent Document 1 is configured to have a shape that forms a part of a conical shape, its rigidity is high and lacks buckling. When the flexible blade is pressed against the floor surface, it is difficult to bend and cannot follow the unevenness or level difference of the floor surface uniformly and flexibly. As a result, sewage leaking from the floor remains on the floor surface. There was also a problem.

  Further, as shown in FIGS. 2 and 3, the squeegee described in Patent Document 1 has left and right guide wheels attached to the rear portions on both sides of the squeegee. The vertical position of the squeegee does not match the vertical distance of the guide wheel, and as a result, according to the vertical operation amount of the guide wheel. There has been a problem that the suction performance varies due to variations in the contact state between the squeegee and the floor surface. In addition, if there is a step on the floor surface, the contact state of the squeegee with respect to the floor surface with respect to the vertical change of the guide wheel causes a greater change, resulting in failure to maintain normal suction operation.

  The present invention has been made in order to eliminate the drawbacks of the squeegee formed in the above-mentioned substantially arcuate shape, and its technical problem is to determine the ground contact state of the flexible blade against the level difference and unevenness of the floor surface. By eliminating the difference and improving the followability of the flexible blade to the floor, the stability of the contact angle with the floor of the flexible blade at the tip of the squeegee, and the followability of the guide wheel to the squeegee, An object is to provide a squeegee for a floor cleaning machine or the like with high recovery performance by improving the squeezing force of unstable sewage and dust caused by the difference in contact angle.

(1) In order to solve the above technical problem, the floor squeegee for squeegee according to claim 1 of the present invention is configured to suck up the floor cleaning sewage and dust by the suction force of the blower. A squeegee for a floor cleaning machine or the like, which is bent and formed into a substantially bow shape so that cleaning sewage can be collected in the central part in the traveling direction of the entire squeegee, and includes two front and rear flexible blades attached to the squeegee Among these, when at least the lower end side of the rear flexible blade is grounded to the floor surface, the angle between the edge of the blade lower end portion and the floor surface is 20 ° to 65 °. It is characterized by being curved toward the traveling direction of the squeegee so as to be within the range of.

(2) Further, in the squeegee for a floor cleaning machine according to claim 2 of the present invention, the radius of the lower end side curved shape of the rear flexible blade is 4 to 4 mm of the thickness of the flexible blade. It is characterized by being 7 times larger.

(3) Further, in the squeegee for a floor cleaning machine or the like according to claim 3 of the present invention, the squeegee has a substantially bow shape as a whole, a cross-sectional shape formed in a substantially concave shape, and a substantially bow shape. The squeegee body that has a plurality of clip protrusions spaced apart in the longitudinal direction on both the front and rear sides that are curved into the mold, and the clip holes that are spaced apart in the longitudinal direction of the side faces, respectively. Each of the front and rear flexible blades attached to the front and rear sides of the squeegee main body by inserting a child, and each clip hole formed as a whole and spaced apart in the longitudinal direction of the side surface Further, it is constituted by two front and rear press plates that can be attached to both the front and rear side surfaces of the squeegee body with the respective flexible blades sandwiched between them by fitting the respective clip protrusions. That It is a symptom.

(4) Further, in the squeegee for a floor cleaning machine according to claim 4 of the present invention, the curved shape formed on the lower end side of the rear flexible blade is the upper end of the rear flexible blade. It is also characterized by being formed symmetrically on the part side.

(5) Further, in the squeegee for a floor cleaning machine according to claim 5 of the present invention, left and right guide wheels for supporting the squeegee are attached to the rear portions of the right and left sides of the squeegee bent and formed in the substantially bow shape, The suction vent of the blower opened at the center of the upper surface of the squeegee is located on a line connecting the centers of the left and right guide wheels.

  According to the means described in the above (1), when the squeegee is moved while the edge portion of the flexible blade is grounded to the floor surface, even if there is a step or unevenness on the floor surface, the rear flexible blade The curved portion provided on the lower end side of the squeegee, that is, the curved portion curved in the direction in which the squeegee moves, bends following these steps and unevenness, and is cushioned by the bending of the curved portion to the floor surface. The ground contact angle of the tip edge portion of the rear flexible blade is not greatly changed, and the inner angle can be maintained within the range of 20 ° to 65 °, so that the flexible blade can stably wash sewage and dust. It is possible to rake and suck in the state.

  Further, according to the means described in the above (2), the rear flexible blade of the squeegee is elastically grounded while being bent with respect to the floor surface due to its curved shape and its plate thickness. Since the ground contact angle of the rear flexible blade (edge) with respect to the floor surface can be maintained within a predetermined range, the rear flexible blade stably follows the floor surface with a step or uneven surface. It can exhibit excellent sewage and dust recovery performance by exhibiting the properties and scraping performance.

  Further, according to the means described in the above (3) and (4), the replacement work of the flexible blade with respect to the squeegee main body can be performed very simply and efficiently only by attaching and detaching the two front and rear press plates. When the rear flexible blade is worn out by use, the rear flexible blade can be removed by simply attaching and detaching the presser plate and reattaching the rear flexible blade upside down. It is possible to reuse the blade.

  Further, according to the means described in the above (5), the guide wheel is vertically changed by the unevenness of the floor surface by synchronizing the vertical change of the guide wheel and the vertical change of the squeegee with respect to the unevenness (upward and downward change) of the floor surface. Even if it does, the contact state to the floor surface of a squeegee does not change by it, and it becomes possible to always maintain a uniform suction state.

  As described above, according to the squeegee for a floor cleaning machine and the like according to the present invention, it is possible to overcome the drawbacks of the conventional substantially bow-shaped squeegee, and to follow the floor surface of the flexible blade, and the squeegee tip. The stability of the ground contact state on the floor surface and the followability of the guide wheel to the squeegee can be enhanced, respectively, and an excellent ability to collect sewage and dust can be demonstrated on the floor surface with steps and irregularities, Combined with the convenience of being able to easily replace the flexible blade and the economics of being able to reuse the rear flexible blade, the floor cleaning machine and dedicated sewage collection machine It is a useful thing to be used for such as.

  The embodiment of the squeegee for floor cleaning machine according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view illustrating the internal structure of the floor cleaning machine in which the squeegee according to the present invention is implemented. FIGS. 2A and 2B are plan views thereof. In these drawings, 1 is the body of the washing machine, 1a is a handle for driving, 1b and 1c are driving wheels and front wheels, and 2 is rotated by a motor 2M. Pads or rotating brushes for cleaning the floor surface, 3 and 4 are tanks for clean liquid or detergent CW and sewage DW tanks installed in the body 1, and 5 is taken in from the intake 5a by the action of the pump 5T. The liquid supply pipe which supplies the said clear liquid or detergent liquid CW to said pad or the rotating brush 2 is shown.

  Reference numeral 10 generally denotes a squeegee according to the present invention which is formed in a substantially arcuate shape as a whole. The squeegee 10 connected to the rear part of the machine body 1 is connected to a sewage tank through a suction pipe 6. The suction force of the blower 6T acting in the inside 4 is exerted through the vacuum hose 9 from the tip opening 9a, and the sewage remaining on the floor surface by the cleaning rotation of the pad or the rotating brush 2 with this suction force is removed from the vacuum hose 9. It is constituted so that it may be sucked and collected in the sewage tank 4 through. A suction port 6a with a float valve is provided at the upper end of the suction pipe 6 described above.

  Further, in the figure, 7 is a substrate attached to the center of the upper surface of the squeegee 10, 7H is a connecting plate for connecting the squeegee 10 to the rear portion of the machine body 1, 7T is an attaching shaft for connecting the connecting shaft 7K of the connecting plate 7, 1, 2, and FIG. 3, FIG. 4, and FIG. 5, an enlarged plan view, a front view, and a bottom view, 11 is a squeegee having a substantially bow shape constituting the squeegee 10. In the main body, the squeegee main body 11 is formed in a substantially sectional concave shape. 11S and 11T are front and rear side surfaces of the squeegee body 11, and 12 and 13 are front and rear flexible blades attached to the front side surface 11S and the rear side surface 11T respectively with a front and rear space therebetween. The interval between the front and rear flexible blades 12 and 13 suspended below the bottom surface of the main body 11 constitutes a squeegee chamber 11W (see FIG. 5).

  14A and 14B are press plates for attaching the two flexible blades 12 and 13 to the front side surface 11S and the rear side surface 11T of the squeegee main body 11, and 11A... 11B are front and rear side surfaces 11S of the squeegee main body 11. , 11T projecting at intervals in the longitudinal direction, and the vertical width of each holding plate 14A, 14B is about 1/3 of the vertical width of the flexible blades 12, 13 as shown in the figure. The whole is configured to be elongated.

  The clip protrusions 11A, 11B, and the like are elastically fitted into the front and rear flexible blades 12, 13 and the front and rear press plates 14A, 14B, which are formed as a whole. Catch clip type clip holes (not shown) are provided at intervals in the longitudinal direction, and each clip hole is fitted into each of the clip protrusions 11A, 11 ... B. After the flexible blades 12 and 13 are attached, the presser plates 14A and 14B are attached so as to hold the flexible blades 12 and 13 from above, so that the flexible blades 12 and 13 are attached to the squeegee body. 11 can be attached to the front and back side surfaces 11S and 11T, and the two flexible blades 12 and 13 can be easily attached and detached (replaced) by removing the holding plates 14A and 14B. It is made to that mechanism.

  The flexible blades 12 and 13 are made of, for example, polyether urethane rubber having excellent durability and flexibility, and the press plates 11S and 11T are metal plates (for example, spring plates) having elasticity. Of course, any of these materials is an example of implementation.

  Further, in the figure, reference numerals 15 and 15 denote wheel covers which are rotatably attached to the rear portions of the left and right ends of the squeegee 10 using bolts 15b and 15b. The left and right guide wheels 16 and 16 that support the squeegee 10 are rotatably mounted by 15a. Reference numerals 17 and 17 are left and right guide wheels, 7X and 7X are bolts for attaching the above-described substrate 7 to the central portion of the squeegee 10, and 8 is a cylinder through which the above-described vacuum hose 9 is connected. The suction force of the blower 6T is passed through the vent 11R opened in the upper surface of the central portion of the squeegee body 11 from the through cylinder 8 and into the space between the front and rear flexible blades 12, 13, that is, into the squeegee chamber 11W. It is structured to reach.

  In the present invention, the air vent 11R opened on the upper surface of the central portion of the squeegee main body 11 is positioned on the line connecting the centers of the left and right guide wheels 16 and 16 (axles 15a and 15a). Even if the guide wheels 16 and 16 change up and down due to the unevenness of the floor surface by synchronizing the up and down changes of the guide wheels 16 and 16 and the up and down change of the squeegee 10 with respect to the change (up and down change), to the floor surface of the squeegee 10. Thus, the contact state does not change accordingly, and a uniform suction state can always be maintained.

  Next, FIG. 6 is an enlarged cross-sectional view showing the main part of the present invention, in which 13A indicates a curved portion formed at the lower end portion of the rear flexible blade 13. The curved portion 13A is configured by bending (bending) its lower end toward the traveling direction of the squeegee 10, and further, the rear flexible blade 13 is bent with respect to the floor surface FL as illustrated. The grounding angle (inner angle) between the edge 13T on the inner side of the tip and the floor surface FL is set within a range of 20 ° to 65 ° when it is grounded in a bent state. The radius of the curved shape (circular shape) formed is configured to be 4 to 7 times the plate thickness of the flexible blade 13.

  FIG. 7 shows a squeegee grounding angle in a dust collection experiment using a fiber sample as model dirt, that is, a grounding angle with the lower edge 13T of the rear flexible blade 13 with respect to the floor surface FL, and the remaining number of fibers as dust. From the experimental data shown in the figure, it has been found that dust (washed sewage) can be collected from the floor surface FL in a state where the contact angle is most stable at 20 ° to 65 °.

  Next, FIG. 8 shows the change in the contact angle of the squeegee rubber (flexible blade) with respect to the unevenness of the floor surface FL, based on the measurement by experiment, with the distance (mm) from the center of the squeegee rubber as the horizontal axis, In the figure, E1 has a curved portion 13A as described above and has a radius that is 4 to 7 times the plate thickness when the floor surface FL is concave. The change in the contact angle of the curved rubber of the present invention (rear flexible blade 13) is shown, and E2 shows the change in the contact angle of the curved rubber of the present invention when the floor surface FL is a convex portion. . F1 indicates a change in the contact angle of the conventional straight rubber when the floor surface FL is a concave portion, and F2 indicates a contact angle of the direct rubber when the floor surface FL is a convex portion.

  FIG. 9 specifically illustrates changes in the contact angle of the squeegee rubber at points A, B, C, and D in FIG. 8 and the center of the squeegee. As a result, when designed with a contact angle of about 45 °, the squeegee using the curved rear flexible blade 13 having the curved portion 13A of the present invention with respect to the unevenness of the floor surface FL of ± 2 mm, While it was possible to follow the contact angle range of 52 ° to 39 °, it was found that the contact angle greatly changed from 65 ° to 15 ° in the squeegee using the conventional direct rubber.

The perspective view explaining the internal structure of the floor washing machine provided with the squeegee which concerns on this invention. The top view of the floor surface washing machine shown in FIG. The top view which expanded and showed the squeegee which concerns on this invention. The front view which expanded and showed the squeegee which concerns on this invention. The bottom view which expanded and showed the squeegee which concerns on this invention. Sectional drawing which expanded and showed the principal part of the squeegee which concerns on this invention. The graph which showed the data of the collection experiment of garbage which used model dirt. The graph which showed the contact angle of the squeegee rubber (flexible braid | blade) based on this invention measured by experiment, and the conventional squeegee rubber. Explanatory drawing which showed the change of the squeegee contact angle with respect to the unevenness | corrugation of the floor surface in each point of A, B, C, D shown in FIG. 8, and a squeegee center part. Explanatory drawing explaining the change of the conventional squeegee rubber height.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floor washing machine body 6T Blower 10 Squeegee of substantially bow shape 11 Squeegee body 11A, 11B Clip protrusion 11R Vent 12 Front flexible blade 13 Rear flexible blade 13A Curved portion 13T Edge 14A, 14B Presser foot Board 15a Axle 16 Guide wheel FL Floor

Claims (5)

Floor cleaning machine that is bent and formed into a generally arcuate shape so that cleaning sewage can be collected at the center in the direction of travel, etc. A squeegee,
Of the two front and rear flexible blades attached to the squeegee, when at least the lower end of the rear flexible blade is grounded to the floor, the lower end of the rear flexible blade A squeegee for a floor cleaning machine or the like, wherein the squeegee is curved toward the traveling direction of the squeegee so that the angle between the edge and the floor is in the range of 20 ° to 65 °.   2. The floor according to claim 1, wherein a radius of a curved shape on a lower end side of the rear flexible blade is configured to be 4 to 7 times as large as a thickness of the flexible blade. Squeegee for face washing machines. The squeegee is
A squeegee that has a generally arcuate shape as a whole, a cross-sectional shape that is substantially concave, and a plurality of clip protrusions protruding in the longitudinal direction of both front and rear sides curved in a generally arcuate shape. The body,
Two front and rear flexible blades attached to the front and rear sides of the squeegee body by fitting the clip protrusions into the clip holes provided at intervals in the longitudinal direction of the side surfaces;
Each of the flexible blades is sandwiched in the middle by inserting each of the clip protrusions into each of the clip holes that are formed in an elongated shape and spaced apart in the longitudinal direction of the side surface. The squeegee for a floor cleaning machine or the like according to claim 1 or 2, wherein the squeegee is constituted by two front and rear press plates that can be attached to both front and rear side surfaces of the squeegee body in a state.   The curved shape formed on the lower end side of the rear flexible blade is also formed symmetrically on the upper end side of the flexible blade. The squeegee for a floor cleaning machine or the like according to 3.   Left and right guide wheels that support the squeegee are attached to the left and right rear portions of the squeegee that is bent into a substantially arcuate shape, and the suction vent of the blower that opens at the center of the upper surface of the squeegee 5. The squeegee for a floor cleaning machine or the like according to claim 1, wherein the squeegee is located on a line connecting the centers of the guide wheels.

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