JP3127565B2 - Floor sweeper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor cleaning vehicle for cleaning floors, roads, and the like (hereinafter referred to simply as floors), and more particularly to a negative pressure chamber for applying a negative pressure to a dust box. The present invention relates to a floor cleaning vehicle having the same.

[0002]

2. Description of the Related Art As shown in FIG. 7, a floor cleaning truck of this type is provided with a dust box 51 on the front side of a vehicle 50.
A main brush 53 is accommodated in a main brush chamber 52 provided at the center of the bottom of the vehicle 50. Dust box 5
1 is formed in a substantially L-shaped side surface, and is rotatably supported on a shaft 54 at an upper portion thereof. The cylinder 55 is moved to a cleaning operation position shown in FIG. 7 by a function of the cylinder 55, and is moved to a dust discharge position rotated clockwise by approximately 90 degrees from the state shown in FIG.

An opening 51 is provided above the dust box 51.
a is formed, and a filter 57 having a shaker motor 56 is provided in the opening 51a. A negative pressure chamber 5 is provided outside the dust box 51 at a position corresponding to the filter 57.
8, a box-shaped cover 59 is provided. The cover 59 is detachably fixed by bolts 60 so that the cover 59 can be detached during maintenance of the shaker motor 56 and the filter 57. A pipe (not shown) to which a negative pressure acts when a blower motor (not shown) is driven is connected to the negative pressure chamber 58, and a suction airflow from the inlet 51 b of the dust box 51 toward the inside of the dust box 51 is generated when the blower motor is driven. ing. The dust on the floor surface is swept up toward the dust box 51 with the rotation of the main brush 53, and is collected in the dust box 51 by the action of the suction airflow.

[0004]

However, in the above-mentioned conventional structure, the cover 59 forming the negative pressure chamber 58 is provided with the bolt 6.
0 is fixed to the dust box 51. Therefore, when the cover 59 is removed from the dust box 51 during maintenance of the shaker motor 56 and the filter 57, it is necessary to secure a place where the cover 59 is placed.
In addition, a large number of bolts 60 are required in order to ensure the sealing property between the cover 59 and the dust box 51, and there is a problem that removal and attachment are troublesome.

The present invention has been made in view of the above problems, and an object of the present invention is to easily open and close a cover constituting a negative pressure chamber during maintenance of a filter and a shaker motor provided in a dust box. It is an object of the present invention to provide a floor cleaning vehicle which does not need to secure a place for a cover during maintenance work.

[0006]

According to the present invention, there is provided a main brush which rotates at the bottom of a vehicle and sweeps dust on a floor surface into a dust box mounted on a front side of the vehicle. In a floor cleaning vehicle, a cover that covers the front surface of the dust box is rotatably supported by the dust box, and an opening end of a passage communicating with an intake source when the cover is disposed inside the cover at the closed position; and a filter unit. , A partition for forming a negative pressure chamber surrounding the cover, open holding means for holding the cover in an open position, and closed holding means for holding the cover in a closed position.

[0007]

When the cover is placed in the closed position, the partition wall surrounds the opening end of the passage communicating with the intake air source and the filter portion, and a negative pressure chamber is formed. The cover is held at the position by the operation of the holding means. Then, the seal provided at the tip of the partition is pressed against the dust box, and the airtightness between the partition and the dust box is maintained. Then, the negative pressure of the intake source acts on the inside of the cover from the open end of the passage communicating with the intake source, and the negative pressure acts on the inside of the dust box via the filter unit. When the operation of the closing and holding means is released and the cover is opened, the cover is held at the open position by the action of the opening and holding means, and the filter section is opened.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIGS.
This will be described with reference to FIG. As shown in FIG. 1, a dust box 2 is provided on a front surface of a vehicle 1 of a floor cleaning vehicle,
A main brush 4 is accommodated in a main brush chamber 3 provided at the center of the bottom of the main brush. Dust box 2 is almost L on the side
It is formed in a character shape, and is rotatably supported by a shaft 5 at an upper portion thereof. The cylinder is moved to a cleaning operation position shown in FIG. 1 by a function of a cylinder (not shown) and a dust discharge position rotated substantially 90 degrees clockwise from the state shown in FIG.

A square opening 2a is formed in the upper front surface of the dust box 2, and a filter 6 is provided in the opening 2a. On the filter 6, a shaker motor 6a for applying vibration to the filter 6 is provided. A filter section is constituted by the filter 6 and the shaker motor 6a. As shown in FIG. 2, a hose connecting portion 7 is formed in the dust box 2 at a position outside the opening 2a. The hose connecting portion 7 is a passage whose communication with the inside of the dust box 2 is cut off by an annular wall surface. The blower 8 (shown in FIG. 1) as an intake source is a dust box 2
One end of a hose (not shown), which is fixed so as not to be able to rotate integrally and forms a passage communicating with the intake source, is connected to the blower 8. The other end of the hose is connected to the hose connection portion 7 when the dust box 2 is located at the cleaning operation position, and is disconnected from the hose connection portion 7 when the dust box 2 is rotated from the cleaning operation position to the dust discharge position. It has become. A lip 9 is provided below the entrance 2b of the dust box 2 along the width direction, and the tip of the lip 9 slides on the floor surface.

A cover 10 for covering the upper portion of the dust box 2 is rotatably supported on the upper portion of the dust box 2 via a support shaft 11 at a support portion 10a formed on the upper portion. Inside cover 10 is cover 1
0 is in the closed position, the hose connection 7
A partition wall 12 is provided so as to surround the opening end of the filter 6 and the filter 6. As shown in FIG. 6, a flange 13 having a trapezoidal outer shape is formed around the partition 12, and a sealing member made of, for example, urethane foam resin is formed on the lower surface of the flange 13 along the periphery of the partition 12. The sealing portion 14 is formed by being fixed. When the cover 10 is in the closed position, the seal portion 14 is pressed against the front surface of the dust box 2.

The flange 13 has brackets 1 on both left and right sides.
5 is protruded, and a bracket 15 is connected to a piston rod 16a of a cylinder 16 as an open holding means by a pin. The base end of the cylinder 16 is rotatably supported by a bracket provided on the upper part of the dust box 2 via pins (both not shown). Cylinder 16
Is configured to generate a protruding output by pushing the piston rod 16a into the cylinder 16. And
The cylinder 16 is arranged such that the projecting output of the cylinder 16 urges the cover 10 to the open side from the state in which the cover 10 is rotated from the closed position to the open side by a predetermined angle.

As shown in FIGS. 1 to 3, a pair of left and right support pieces 17 project from the lower end of the cover 10, and a through hole (not shown) is formed in the support piece 17. In the dust box 2, a screw hole 18 (shown in FIG. 2) is provided at a position facing the through hole 17a in a state where the cover 10 is disposed at the closed position.
Are formed. And screw 19 with knob
Are screwed into the screw holes 18 while passing through the through holes. The screw hole 18 and the screw 19 constitute a closed holding means for holding the cover 10 in the closed position.

Next, the operation of the floor cleaning vehicle configured as described above will be described. During the cleaning operation, the cover 10 is arranged at the closed position, the screws 19 are screwed into the screw holes 18, and the cover 10 is held at the closed position. In this state, the seal portion 14 is pressed against the dust box 2 and the seal portion 1 is pressed.
An airtightness between the dust box 4 and the dust box 2 is maintained, and a negative pressure chamber 20 covering the filter 6 and the open end 7a of the hose connection part 7 is constituted by the cover 10, the partition wall 12, and the seal part 14.
Then, the blower 8 is driven, a negative pressure is applied to the negative pressure chamber 20 via the hose and the hose connecting portion 7, and a negative pressure is applied to the inside of the dust box 2 via the filter 6.
Even when vibration is applied to the cover 10 during running or the like, the cover 10 is held at the closed position by the action of the screw 19.

When the vehicle 1 is run by rotating the main brush 4 in this state, dust on the floor passes under the lip 9 and is guided into the main brush chamber 3. The dust is swept up into the dust box 2 from the inlet 2b by the main brush 4 and collected. Further, the inside of the dust box 2 becomes negative pressure by driving the blower 8, and a suction airflow from the inlet 2b toward the inside of the dust box 2 is generated. And
Dust generated by rotation of the main brush 4 is sucked into the dust box 2, and dust floating in the dust box 2 is attached to the filter 6 by the action of the negative pressure chamber 20. Then, the shaker motor 6a is appropriately driven, and the dust attached to the filter 6 is dropped into the dust box 2 in a state of growing.

When performing maintenance work on the filter 6 and the shaker motor 6a, the screws 19 are loosened, and then the lower side of the cover 10 is lifted. When the cover 10 is rotated from the closed position to the predetermined position, the cover 10 is automatically rotated to the open position shown in FIGS. 1 and 2 by the operation of the cylinder 16 and is held at that position. Cover 10
Is located at the open position, the filter 6 and the shaker motor 6a can be maintained. That is, unlike the conventional device in which the cover is fixed by a large number of bolts, the maintenance work of the filter 6 and the shaker motor 6a can be performed only by loosening a small number (two in this embodiment) of the screws 19 and lifting the cover 10. Becomes possible. Further, since the cover 10 is supported by the dust box 2, the cover 1 is
There is no need to secure a place for zero.

When the cover 10 in the open state is arranged at the closed position, the cover 1
Press 0 down. After the cover 10 is rotated to a predetermined position, the protruding output of the cylinder 16 acts in a direction to push the cover 10 down. Then, after turning to the closing position, the screw 19 is screwed into the screw hole 18 and tightened. as a result,
Cover 10 is held in the closed position.

In this embodiment, since the cover 10 is supported by the support shaft 11 at its upper end, the seal portion 14 is pressed against the dust box 2 by its own weight when the cover 10 is disposed at the closed position. . Also, cover 1
Since the mounting position of the screw 19 for tightening and fixing 0 to the closed position is provided at a position far from the center of rotation of the cover 10, the seal portion 14 is securely pressed against the dust box 2 even with a weak tightening force. Further, the cylinder 16 as the open holding means urges the cover 10 to the closing side when the cover 10 is located at the closed position, and thus also serves as the closed holding means. Therefore, it is not necessary to increase the tightening force of the screw 19.

The present invention is not limited to the above-described embodiment. For example, a single screw 19 or a hook or the like provided on one of the cover 10 and the vehicle 1 as a closing and holding means may be used. A combination of a locking member and a locked portion such as a pin or a hole for locking the locking member provided on the other side may be employed. Further, a magnet may be fixed at a position where the cover 10 and the vehicle 1 are opposed to each other in a state where the polarities are opposite to each other, or one of the magnets may be an iron plate instead of the magnet. Further, the cover 1 disposed at the open position instead of the cylinder 16 as the open holding means.
0 may be provided. Also, cover 1
Instead of the configuration in which 0 is opened upward, the cover 10 may be rotatably supported on the dust box 2 at its side and open to the side. Further, the blower 8 may be fixed so as to be integrally movable with the dust box 2, and the other end of the hose connected to the blower 8 may be always connected to the hose connecting portion 7.

[0019]

As described in detail above, according to the present invention, the cover constituting the negative pressure chamber can be easily opened and closed during maintenance of the filter and the shaker motor provided in the dust box, and the work efficiency is improved. improves. Further, since it is not necessary to secure a place for placing the cover during the maintenance work, the cover can be opened at an arbitrary position.

[Brief description of the drawings]

FIG. 1 is a partially broken schematic side view showing a state where a cover of a floor cleaning truck according to an embodiment of the present invention is opened.

FIG. 2 is a schematic front view of the same.

FIG. 3 is a front view showing a state in which a cover is closed.

FIG. 4 is a side view of the same.

5A is a side sectional view of a cover, and FIG. 5B is a plan view of the cover.

6 is a view of the cover as viewed from the direction of arrow B in FIG. 5 (a).

FIG. 7 is a partially broken schematic side view showing a conventional floor cleaning truck.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Dust box, 4 ... Main brush, 6
.., A filter constituting a filter portion, 6a a shaker motor, 7 a hose connecting portion constituting a passage, 7a an open end, 8 a blower as an intake source, 10 a cover,
... partition wall, 14 ... seal part, 16 ... cylinder as open holding means, 18 ... screw hole constituting closed holding means, 19
... Similar screws, 20 ... Negative pressure chamber.

Claims (1)

(57) [Claims] 1. A floor cleaning vehicle having a main brush which rotates at the bottom of a vehicle and sweeps up dust on a floor surface into a dust box mounted on a front side of the vehicle, wherein a cover covering a front surface of the dust box is attached to the dust box. A partition wall that rotatably supports, forms a negative pressure chamber around an opening end of the passage communicating with the intake source and the filter portion when the cover is disposed at the closed position inside the cover, and the cover. A floor cleaning vehicle provided with an open holding means for holding an open position and a closed holding means for holding a cover at a closed position.