JP3202468B2 - Floor polisher with dust blowing prevention function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in the technical field of a floor polisher for polishing a floor by rotating a pad at a high speed with a motor while running the body. Has a dust spill prevention function that enables the polishing work to proceed without scattering the various types of dust such as pad debris and dust on the floor surface generated when polishing the pad by rotating the pad at high speed. The present invention relates to a floor polisher provided with the above.

[0002]

2. Description of the Related Art In a conventional floor polisher in which a pad is rotated at a high speed by a motor while an operator operates an operating handle to move the machine to polish the floor, for example, a conventional flat polisher 4 is used.
As disclosed in Japanese Patent Application Laid-Open No. 1-116941, by covering the periphery of the pad with a pad cover, various types of dust generated when the pad rotates are prevented from scattering around.

However, since the scattering of dust cannot be completely prevented only by covering the periphery of the pad with the pad cover, conventionally, as shown in FIG. R, or as shown in Japanese Utility Model Laid-Open No. 5-39456 and FIG. 8, a ring-shaped core Y is inserted into the lower end of the pad cover K using a clamp Ka, and By attaching a synthetic resin skirt X whose peripheral surface is covered with a molding Z, the adhesion and followability to the floor surface are improved, and even if the pad P attached to the pad base PD rotates at high speed, dust is not removed. The device was devised so as not to leak out of the cover K.

[0004]

However, in the case of the rubber skirt R shown in FIG. 7, it is necessary to adjust the height of the skirt R at the time of assembling because the seal is incomplete and there is a lot of leakage. Since the skirt R is constantly in contact with the floor, the skirt R is severely damaged. Replacement is troublesome due to the large number of mounting screws N. There were various problems.

In the case of the synthetic resin skirt X shown in FIG. 8, the sealing performance is slightly improved as compared with the rubber skirt R shown in FIG. 7, but the durability of the skirt X is uneasy. Or, it is not possible to sufficiently follow the unevenness of the floor surface, and there is dust leakage. Since the clamp Ka must be removed one by one, replacement of the skirt X is troublesome. There have been various problems, and improvements have been desired.

[0006] Therefore, a technical problem of the present invention is that the seal skirt attached to the pad cover surely follows irregularities on the floor surface and exhibits excellent sealing performance, so that dust is leaked around the pad cover. And to improve the slidability and durability of the seal skirt and make it extremely easy to replace the seal skirt.

[0007]

Means taken by the present invention to solve the above-mentioned technical problems are as follows.

[0008] In a floor polisher for polishing a floor by rotating a pad mounted in a pad cover at a high speed by a motor while running the machine,

(1) Under the pad cover, a lower end side in contact with the floor surface is bent inward along the floor surface, and a lower end side bent inward is formed. Attach a soft rubber seal skirt integrally formed with a nodular thick part.

[0010] (2) The bulky thick portion integrally formed at the lower end side end of the seal skirt is formed in a substantially triangular cross section.

(3) A member having excellent slidability is fitted or coated on the lower surface of the seal skirt in contact with the floor surface.

(4) A fitting groove is formed at the lower end of the pad cover, while a fitting portion is formed at the upper end of the seal skirt so as to be elastically fittable into the fitting groove by the elasticity of the material itself. Then, the entire seal skirt is configured to be detachable from the pad cover.

[0013]

The means (1), (2), (3) and (4) described above operate as follows.

According to the means described in the above (1), the bottom surface on the lower end side of the inwardly bent seal skirt is in wide and elastic contact with the floor surface, while the reaction pressure of the dynamic pressure (speed pressure) is high. A downward force is applied to the thick-walled portion integrally formed at the tip portion, and furthermore, the pressure distribution at the outer portion of the pad rotating at high speed, that is, at the bent lower inner portion of the seal skirt is changed to the atmospheric pressure. Since the pressure increases downward due to the influence of the air current acting in the centrifugal direction and the downward direction, a self-sealing effect is exerted on the lower end side of the seal skirt by a synergistic effect of these. Therefore, it is possible to further improve the sealing performance on the floor surface and eliminate dust leakage.

According to the means described in the above (2), the dynamic pressure (fast dynamic pressure) effectively acts on the tip inclined surface of the thick portion formed in a substantially triangular cross section, and the reaction of the dynamic pressure is prevented. Accordingly, a downward force in the floor surface direction is more effectively applied to the thick portion, whereby higher sealing performance can be exhibited, and a space formed inside the thick portion having a substantially triangular cross section. Since a high static pressure is generated, the above-mentioned self-sealing effect is further improved, and an excellent sealing action can be exhibited.

According to the means described in the above (3), when the seal skirt moves while being in contact with the floor surface, ordinary soft rubber is hard to slip and the skirt is turned up, so that the original sealing function cannot be exhibited. The seal skirt can be smoothly slid by the member having excellent slidability that is fitted or coated on the lower end surface of the seal skirt so as to exhibit the original sealing function.

According to the means described in (4) above, the seal skirt is attached to the pad cover by utilizing the elasticity of the material of the seal skirt itself without using a clamp or the like. Can be performed very easily.

As described above, the above-mentioned technical problems can be solved by the above-described means, and the problems of the conventional technology can be solved.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the above-mentioned floor polisher having a function of preventing dust leakage according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a side view showing a cross-section of a main part of a floor polisher having a dust blowing prevention function according to the present invention. In the figure, reference numeral 1 denotes a body of the floor polisher. Reference numerals 2 and 3 denote traveling wheels, reference numerals 4 and 5 denote batteries mounted as power sources in the body 1, M denotes a motor serving as a driving source, Ma denotes a rotating shaft of the motor M, and 18 denotes a high-speed rotation by the motor. Reference numeral 17 denotes a pad mounting base for mounting the pad 18 to the rotating shaft Ma of the motor M.

Further, in FIG. 1, the reference numeral 10 generally designates a rotation mechanism of the pad 18, and the above-mentioned rotation axis Ma passes downward through the fixed frame 11 attached to the body 1. And a pad mount 17 at its lower end.
Is fixed using screws.

Reference numerals 15a... Denote a plurality of fans (rotating blades) radially formed on the upper surface of the central portion 15 of the pad mounting base 17, and 16 denotes a nut (not shown) provided at the center of the bottom surface of the pad mounting base 17. 4) shows a pad mounting screw for fixing the pad 18 to the bottom surface of the pad mounting base 17 by screwing into and tightening the pad.

Next, 13 is a pad cover mounted on the bottom surface of the fixed frame 11 via a telescopic bellows 12 with an adjusting screw, and 14 is a mounting edge 14c formed on the upper end edge as shown in FIG. A fitting groove 13a formed in the lower edge of the pad cover 13 by the elasticity of the material itself.
A soft rubber seal skirt removably attached to the lower portion of the pad cover 13 by being elastically fitted into the inside of the pad cover 13 in a rotating chamber formed by the pad cover 13 and the seal skirt 14. Reference numeral 18 is a mechanism that is rotated at a high speed by the motor M.

Reference numeral 19 denotes a guide cover frame attached to the bottom surface of the fixed frame 11 so as to surround the above-mentioned fans 15a. The outside of the guide cover frame 19 is formed by the rotation of the fans 15a. The swirling airflow is compressed into a jet stream and blows at a fixed angle to the inner wall surface of the pad cover 13 so that the airflow generated by the rotation of each fan 15a is dust. Are swirled along the inner wall surfaces of the seal skirt 14 and the pad cover 13 with enthusiasm.

In FIG. 1, reference numeral 21 denotes a paper pack filter which is exchangeably mounted in a dedicated box provided in the machine body 1. The inlet 22 of the filter 21 has a duct or a hose through a hose. The pad cover 13 is connected to an air supply port 23 opened on the outer upper surface, and
The exhaust port side is also provided with an intake port 24 protruding from the upper surface near the center of the pad cover 13 via a duct or a hose.
And connects the rotating chamber and the filter 21 by a so-called circulation path.

Further, in the drawing, reference numeral 6 denotes a mounting frame for the above-described motor M. Each support plate 6a of the frame 6 is attached to a total of three columns 7 (one omitted) mounted on the fixed frame 11 side. Are supported movably up and down via springs 7S. When the pad 18 rotates at high speed by the rotation of the motor M, the motor M is lowered by the negative pressure generated in the rotating chamber, and the pad 18 is placed on the floor. It is designed to rotate at high speed in the state of close contact.

In the floor polishing machine configured as described above,
In the present invention, in particular, the lower end side of the above-mentioned seal skirt 14 is bent inward along the floor surface as shown in the sectional view of FIG.
In addition, by forming integrally with the thickened portion 14a having a substantially triangular cross section at the bent tip portion, excellent sealing properties can be exhibited.

As described above, the dynamic pressure (speed pressure) acts on the inclined surface of the thick portion 14a formed in a substantially triangular section as shown in FIG. However, a downward force is similarly applied to the thick portion 14a by the reaction of the dynamic pressure, thereby ensuring the sealing performance.

Further, as shown in FIG. 4, the pressure distribution on the outer side of the pad 18 rotating at a high speed, that is, on the inner portion 14b of the seal skirt 14, which is entirely bent to have a substantially L-shaped cross section (downward), is large. Since the pressure becomes higher than the atmospheric pressure and the downward pressure rises under the influence of the swirling airflow, a self-sealing effect is exerted on the seal skirt 14 by the synergistic effect of these, and the pressure on the floor surface is increased. A more advanced sealing action can be exhibited.

FIG. 5 shows that the seal skirt 14 which has a large contact area with the floor surface and is entirely made of soft rubber lacking in slidability is recessed on the bottom surface thereof in order to exhibit excellent slidability. FIG. 6 shows a state in which a sliding plate 14S made of a material having good sliding properties such as ultra-high molecular weight polyethylene or ethylene tetrafluoride resin (Teflon) is fitted into the mounting groove 14d. The above material is coated on the bottom surface of the seal skirt 14 to form the smooth surface layer 1.
This shows a state where 4T is formed.

Since the floor polisher having the function of preventing dust leakage according to the present invention has the above-described configuration, when the body 1 runs while the pad 18 is rotated at a high speed by the motor M, the pad 18 The floor surface can be polished, and dust generated in the rotating chamber composed of the pad cover 13 and the seal skirt 14 due to the high-speed rotation of the pad 18, that is, polishing, is generated by the rotation of the fans 15a. An air supply port 23 provided outside of the pad cover 13 rides on the swirling airflow compressed by the guide cover frame 19 and vigorously injected into the rotation chamber.
From the paper pack filter 21 through a duct or hose
After being filtered here, the exhaust gas is again circulated through the duct or hose toward the center of the pad cover 13, and by repeating this circulating operation continuously, various types of glazing caused by polishing are performed. Dust can be sequentially collected in the paper pack filter 21.

When the pad 18 is polished by high-speed rotation, the lower end of the seal skirt 14 can be brought into close contact with the floor surface by the self-sealing action of the seal skirt 14, so that the floor surface has some irregularities or steps. However, since the seal skirt 14 follows the seal skirt 14 and does not leave a gap between the seal skirt 14 and the floor surface, the bottom surface can be extremely hygienicly polished without blowing out dust to the surroundings.

Further, frictional resistance is generated between the seal skirt 14 and the floor surface due to the high self-sealing action of the seal skirt 14. This problem is caused by the fact that the slide plate 14S made of a material having good slipperiness is formed on the bottom surface of the seal skirt 14. The seal skirt 14 can be eliminated by fitting or providing the smooth surface layer 14T by coating. Further, the replacement of the seal skirt 14 can be performed by using the elasticity of the material (soft rubber) itself of the mounting edge 14c of the seal skirt 14. The pad cover 13 is fitted in the fitting groove 13a so that the pad cover 13 can be attached by one-touch operation without using any tools such as screws.

[0034]

As described above, according to the floor polisher having the function of preventing dust from leaking out according to the present invention, various dusts generated by the polishing operation by the high-speed rotation of the pad can remove the dust from the pad cover. Although it is possible to prevent the air from leaking out, in the present invention, in particular, the self-sealing function is exerted on the seal skirt attached to the dust cover, so that the seal skirt is configured to follow irregularities or steps on the floor surface.
There is no danger of dust leaking out during the polishing operation, and the polishing operation can be performed in a sanitary manner.Therefore, it can be used safely in a clean environment such as a hospital or food department. In addition to the fact that the bottom surface of the seal skirt has sliding properties, and that the seal skirt can be easily replaced with one touch, it is a revolutionary floor polisher. Things.

[Brief description of the drawings]

FIG. 1 is a side view showing a cross section of a main part of a floor polisher having a dust blowing leakage prevention function according to the present invention.

FIG. 2 is an enlarged sectional view showing a main part of the present invention.

FIG. 3 is a cross-sectional view of a main part illustrating a state where dynamic pressure is applied to a seal skirt portion according to the present invention.

FIG. 4 is a cross-sectional view of a main part, similarly illustrating a state where a high static pressure is generated in a seal skirt portion.

FIG. 5 is a cross-sectional view showing a state in which a sliding plate is attached to the bottom surface of the seal skirt.

FIG. 6 is a sectional view showing a state in which a sliding material is coated on the bottom surface of the seal skirt.

FIG. 7 is an enlarged sectional view showing a main part of a conventional example.

FIG. 8 is an enlarged cross-sectional view showing a main part of another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body of a polisher M Motor 13 Pad cover 13a Fitting groove 14 Seal skirt 14a Thick part 14c Mounting edge 14d Mounting groove 14S Sliding plate 14T Smooth surface layer 18 Pad

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A47L 11/40 A47L 11/164 A47L 11/19

Claims (4)

(57) [Claims] 1. A floor polishing machine for rotating a pad mounted in a pad cover at a high speed by a motor while running the body to polish the floor, wherein the whole surface is provided under the pad cover. Form a ring, and
A flexible rubber seal skirt in which a lower end side in contact with the floor surface is bent inward along the floor surface, and a lump-shaped thick portion is integrally formed at the tip of the lower end side bent inward. Floor polishing machine with a feature of preventing dust leakage. 2. A floor provided with a function for preventing dust leakage as claimed in claim 1, wherein the thickened portion of the lumps formed integrally with the lower end of the seal skirt has a substantially triangular cross section. Surface polishing machine. 3. A dust spill prevention function according to claim 1, wherein a member having excellent slidability is fitted or coated on the lower surface of the seal skirt in contact with the floor surface. Floor polishing machine. 4. A fitting groove is formed at a lower end portion of the pad cover, and a fitting portion is formed at an upper end portion of the seal skirt so as to be elastically fittable into the fitting groove by the elasticity of the material itself. 2. The floor polishing machine according to claim 1, wherein the entire seal skirt is detachably attached to the pad cover.