JP2001321300A - Nozzle for device of washing floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nozzle for the device of washing floors, which can equalize the suction force at suction holes. SOLUTION: The device is approximately of an isosceles triangle and is in the form of a crushed box. Near the vertical angle inside the nozzle body there is a connector of a suction pump and near the bottom line there is a suction hole of filthy water. A measure for flow control that controls the suction force is set in the channel from the connector of the suction pump to the suction hole of filthy water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle provided in an apparatus for cleaning floors such as carpets and linoleum.
More specifically, the present invention relates to a nozzle configured to adjust a suction pressure.

[0002]

2. Description of the Related Art Conventionally, floor cleaning apparatuses have been widely used for cleaning floors such as carpets and buildings laid on floors of facilities such as hotels. FIG. 8 is a partially cutaway perspective view showing the floor washer A. The floor cleaning machine A can clean the floor by moving the main body in the direction of arrow X in the figure by holding the handle 102 provided above the main body 101 on the floor to be cleaned by the user. Things. Wheels 103 are provided at the lower part of the main body 101 of the floor washer A to facilitate this movement. The floor cleaning machine A is provided with a cleaning water injection nozzle 104 for first spraying cleaning water containing a detergent onto the lower surface in the traveling direction. First, a cleaning water tank (not shown) provided inside the main body passes through a pipe 104a. Cleaning water is sprayed on the floor.

[0003] A rotary brush 107 driven by a motor 107a is provided so as to rub the floor surface. The brush 107 rubs and removes dirt. Further, a high-pressure water injection nozzle 105 for injecting high-temperature high-pressure water is provided, and high-temperature water supplied from a water supply tank (not shown) provided inside the main body through a heater (not shown) and a high-pressure pump through a pipe 105a is supplied. It is sprayed on the floor surface brushed by the rotating brush 107. Finally, a wand nozzle 106 for sucking moisture on the floor surface is provided, and dirt generated by rubbing with the rotating brush 107 and dirty water in which cleaning water and hot water are turbid are drawn through a pipe 106a (not shown). Aspirate with a pump. This completes the cleaning.

[0004]

As shown in FIG. 8, in a floor cleaning apparatus, a wand nozzle having a generally isosceles triangular flat box shape is used as a wand nozzle. In this Wand nozzle, a wide flat rectangular suction port is formed on the bottom surface, and a suction pump connection port is formed near the apex angle formed by the isosceles triangle. Such a shape is convenient because the area capable of sucking the floor surface is large, but there is a problem that the distribution of the suction pressure in the longitudinal direction of the flat rectangular suction port is not constant. That is, the suction pressure is highest in the middle of the suction port and decreases toward both sides. For this reason, the suction of the sewage becomes uneven, and it has been difficult to perform particularly uniform cleaning in cleaning a carpet or the like. The present invention has been made to solve such a problem, and an object of the present invention is to provide a nozzle for a floor cleaning device capable of equalizing the suction pressure of a suction port.

[0005]

In order to solve the above-mentioned problems, a nozzle for a floor cleaning apparatus according to the present invention comprises a substantially isosceles triangular front plate and a substantially two-sided front plate which is in close proximity to the front plate. A flat box-shaped nozzle body formed by an isosceles triangular back plate, a side plate connecting these opposed isosceles, and a nozzle body provided on a vertex side sandwiched by the isosceles of the front plate. A suction pump connection port, a substantially flat rectangular sewage suction port provided on a side of the nozzle body facing the apex of the front plate, and the sewage suction port from the suction pump connection port inside the nozzle body. And a flow rate restricting means for restricting the suction pressure provided on the path up to With such a configuration, the suction pressure can be balanced by providing the flow rate limiting means on the path where the suction pressure is higher than the others, and as a result, the distribution of the suction pressure in the longitudinal direction at the sewage suction port is adjusted. Thus, it can be made substantially uniform. As a result, the floor surface can be washed uniformly, so that the floor surface can be cleaned finely.

It is preferable that the path is the shortest path from the suction pump connection port to the sewage suction port. That is,
Since the shortest path has the least pressure loss, the suction pressure at the sewage suction port is the highest. Therefore, the balance of the suction pressure at the sewage suction port can be most effectively adjusted by suppressing the suction pressure on this path by the flow rate restricting means. It is conceivable to provide an obstacle that blocks the route on the route as the flow rate limiting unit. By providing such an obstacle on the path, the suction pressure is largely suppressed. The use of such an obstacle is also simple in structure, and is robust and desirable.

[0007] The obstacle may be a wall surface whose edges are connected in a substantially rhombic shape, and a pair of opposing vertices of the rhombus may be located on the path. This wall surface may be constituted by an outer surface portion of a plate-like member that can be bent so as to surround a long plate-like member in a diamond shape, or a side edge of a plate formed by cutting a thick plate-like member into a diamond shape. Or can be constituted by a unit. In this way, the obstacles are substantially rhombic, and a set of vertices is located on the route, so that the vertices located on the sewage suction port side and the surface sandwiching the sewage smoothly guide the flow of sewage to both sides. The apex located on the pump connection port side and the surface sandwiching it smoothly return this flow onto the path, suppressing the generation of unnecessary turbulence in the nozzle and increasing the resistance in the nozzle more than necessary That can be avoided.

The flow rate limiting means may be an orifice for reducing the flow rate on the path. That is, instead of completely blocking the flow path with an obstacle, the suction pressure can also be reduced by restricting the flow rate on the path with an orifice.
It is possible to equalize the suction pressure in the longitudinal direction of the sewage suction port. When the nozzle as described above is used in the floor cleaning apparatus, it is possible to uniformly suction the sewage, and thus the floor can be cleaned evenly and cleanly.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view illustrating a nozzle P according to the embodiment. The nozzle P is a wand nozzle used in the floor cleaning apparatus A as shown in FIG.
Similar to a conventional nozzle, a front plate 11 having a substantially isosceles triangular shape is provided.
A flat box-shaped nozzle body 1 formed by a substantially isosceles triangular back plate 12 facing the front plate and a side plate 13 connecting these opposed isosceles.
A suction pump connection port 4 provided on a vertex side of the nozzle body 1 sandwiched between isosceles sides of the front plate; and a substantially flat rectangular shape provided on a side of the nozzle body facing the vertex of the front plate. And a sewage suction port 5. This nozzle P is different from a conventional nozzle in that a straightening plate 6 as a substantially diamond-shaped obstacle is provided inside the nozzle body 1 on a path from the suction pump connection port to the sewage suction port. is there. This current plate acts as a flow rate restricting means for restricting the suction pressure. In the figure, holes are formed in the front plate 11 and the rear plate 12 along the shape of the current plate 6 so that the inner surface of the current plate 6 can be seen from the outside.

First, a method of manufacturing the nozzle P will be described.
Let me explain briefly. FIG. 2 shows an exploded perspective view of the nozzle P. The nozzle P is formed by the front member 50, the back member 60, the current plate 6, and the pump connection port 4. Front member 50
The front plate 1 is formed by bending an isosceles triangular steel plate at a bottom portion and making a hole along the shape of the current plate 6. The rear member 60 is formed by bending a steel plate having a shape in which the shape of the side plate 13 is connected to an equal side of an isosceles triangle so that the side plate 13 is formed, and bending the bottom plate 13 outward. It is bent, and again has holes formed along the shape of the current plate 6, and forms a back plate 12 and a side plate 13. The current plate 6 is formed by bending a long rectangular steel plate into a ring shape so that the edges form a rhombus, and connecting ends of the rings by welding. The pump connection port 4 is a tubular body, and is cut in such a shape that the front end edge thereof matches the shape formed by the upper edge of the side plate 13 and the front edge of the front plate 11. The upper edge of the back plate 12 forms an arc-shaped edge so that the outer circumference of the pump connection port 4 can be justified. A nozzle P as shown in FIG. 1 is formed by joining these four parts by welding. Although a steel plate is used as the material of the nozzle P here, other metal materials such as stainless steel and synthetic resin materials such as vinyl chloride can be widely used.

Next, the operation of the nozzle P having such a configuration will be described. FIG. 3 is a sectional view of the nozzle P taken along line AA in FIG. Considering the route from the pump connection port 4 to the sewage suction port 5, the center of the sewage suction port 5 from the pump connection port 4 ()
Is the shortest. In addition, pump connection port 4
Is the longest route from the end of the sewage suction port 5 to the end (). Therefore, when there is no current plate 6, the fluid passing through the path 1 has the smallest pressure loss, and the fluid passing through the path m has the largest pressure loss. Therefore, in this case, the suction pressure is highest at the center () of the sewage suction port 5 and is lowest at the end (). However, by arranging the rhombic straightening plate 6 so as to close the path 1 as in the present embodiment, a pressure loss can be applied to the fluid sucked from the sewage suction port 5, and suction at the center () is performed. The pressure can be suppressed to balance with the suction pressure at the end (). The rhombic straightening vanes 6 are arranged such that a set of vertices are located on the path l, thereby suppressing generation of unnecessary turbulence.

The balance between the suction pressure at the center () and the suction pressure at the end () can be appropriately adjusted by changing the size of the rhombus of the current plate 6. That is, by providing the rectifying plate 6, the fluid sucked from the center () of the sewage suction port 5 is divided into the paths lr, lr bypassing the rectifying plate 6, and passes through a longer path. The balance between the length of the path lr and the length of the path m of the fluid sucked from the end () is added to the degree of resistance such as turbulence, so that the appropriate position and size of the current plate 6 can be determined. Can be determined. In the present embodiment, the ratio of the rhombic width w of the current plate 6 to the width W of the nozzle body 1 is set to 1: 3, the height h of the rhombic shape of the current plate 6 and the pump connection port 4 side of the current plate 6. From the top to the bottom of the body 1 (sewage suction port 6
The ratio to the distance H to the center ()) is 2: 3. The vertex angle of the isosceles triangle formed by the main body 1 and the angle of the vertex existing on the rhombic path 1 formed by the current plate 6 are the same. With such a configuration, the suction pressure at the center () and the end () of the sewage suction port could be set to be substantially the same.

In the above embodiment, a flow straightening plate 6 as an obstacle is provided on a path passing through the sewage suction port 5 where the suction pressure increases, and the flow path on this path is completely closed. May be provided with an orifice. FIG. 4 is a sectional view showing a case where an orifice having a narrow flow path is provided. In this example, two flow regulating plates 6a, 6a on a rhombus are arranged in parallel as flow rate adjusting means, and a gap between the two is positioned on the shortest flow path l. The gap between the current plates 6a, 6a forms an orifice. By adjusting the interval of the gap, the pressure loss of the fluid passing through the flow path l can be adjusted, and the suction pressure of the sewage suction port 5 can also be made uniform. Further, in this embodiment, the current plate 6 is fixed to the front member 50 and the rear member 60 by welding, but this may be screwed. FIG. 5 shows an exploded perspective view of a nozzle when the current plate is screwed to the front plate and the rear plate. As shown in the figure, when screws are used, a packing 80a made of synthetic rubber is sandwiched between the current plate 6 and the front member 50A for waterproofing. Thereafter, these are integrally fastened by the screw 90a and the nut 90b. Although only one screw 90a, 90b is shown in the figure, screwing is performed on all eight holes shown. The current plate 6 and the back member 60A
In the same manner, screwing is performed after the packing 80b is sandwiched. Finally, if the front member 50A, the rear member 60A and the pump connection port 4 are welded in the same manner as in the above embodiment, a hole having the same shape as the current plate 6 as shown in the perspective view of the nozzle shown in FIG. No nozzle Pa can be obtained.

Further, the nozzle P shown in this embodiment is a wand nozzle used in a floor cleaning apparatus A as shown in FIG. 8, but is different from a hand type floor cleaning apparatus B as shown in FIG. Can also be used. The nozzle Pb shown in the drawing has the same structure as the nozzle P except that the pump connection port 4a is provided slightly upward. Briefly describing the structure of the hand-type floor surface cleaning device B, the pump connection port 4 is connected to the hard pipe 206a,
The other end of the hard pipe 206a is further connected to a flexible hose 206b made of synthetic resin, and the flexible hose 206a is connected to a suction pump (not shown). A hot water spray nozzle 205 for blowing hot water to the floor is provided on the back plate side of the nozzle Pb, and hot water is blown from a hot water tank (not shown) via a pipe 205a. The tile unit 206a
At the upper end of the lever is a lever 2 for controlling the blowing of hot water.
07 is on, and when you hold it, warm water is blown out and it stops when you talk.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a nozzle according to the present embodiment.

FIG. 2 is an exploded perspective view of a nozzle according to the present embodiment.

FIG. 3 shows a nozzle according to the present embodiment,
It is A sectional drawing.

FIG. 4 is a sectional view showing a modified example of the nozzle.

FIG. 5 is an exploded perspective view showing another modified example of the nozzle.

FIG. 6 is a perspective view showing another modified example of the nozzle.

FIG. 7 is a perspective view showing a state in which the nozzle according to the present embodiment is connected to a hand-type floor cleaning device.

FIG. 8 is a partially cutaway perspective view showing the floor cleaning device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nozzle body 11 Front plate 12 Back plate 13 Side plate 14 Pump connection port 15 Sewage suction port 6 Rectification plate

Claims (6)

[Claims] 1. A nozzle for sucking sewage in a floor washing apparatus for spraying washing water onto a floor surface and sucking generated sewage by a suction pump, comprising a front plate having a substantially isosceles triangular shape. A flat box-shaped nozzle body formed by a substantially isosceles triangular back plate facing the front plate, a side plate connecting the opposed isosceles, and the front plate of the nozzle body A suction pump connection port provided on the apex side sandwiched by the isosceles of: a substantially flat rectangular sewage suction port provided on the side of the nozzle body facing the apex of the front plate; and inside the nozzle body. And a flow rate limiting means provided on a path from the suction pump connection port to the sewage suction port to limit suction pressure. 2. The nozzle according to claim 1, wherein the path is a shortest path from the suction pump connection port to the sewage suction port. 3. The nozzle according to claim 1, wherein the flow rate restricting means is an obstacle that blocks a path provided on the path. 4. The nozzle according to claim 3, wherein the obstacle is a wall surface whose edges are connected in a substantially rhombic shape, and a pair of opposing vertices of the rhombus are located on the path. 5. The nozzle according to claim 1, wherein the flow restricting means is an orifice for reducing a flow on the path. 6. A floor cleaning apparatus having a nozzle according to claim 1.