JP4120281B2 - Brush support device for cleaning machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a brush support device for a cleaning machine in which a brush grounded on a cleaning surface can follow the unevenness of the cleaning surface and the grounding load of the brush can be adjusted by the unevenness of the cleaning surface and the amount of dust.
[0002]
[Prior art]
A conventional brush support device for a cleaner is disclosed in Japanese Patent Laid-Open No. 10-195836. This includes a brush lift lever that moves the sweeping brush supported on the vehicle body by a brush swing arm so that it can swing up and down in the up and down direction, and a load switching lever for adjusting the ground contact load of the brush. And each. One end of a rod is swingably connected to the brush swing arm, and one end of a lever is swingably connected to the other end of the rod. The other end of the lever is swingably provided on the vehicle body, and the other end of the brush lifting spring with one end hooked on the vehicle body is hooked on the lever. Moreover, the lever is connected with the brush raising / lowering lever through the link member. The load switching lever is pin-connected coaxially with the other end of the lever, and a pressing portion capable of pressing the upper surface of one end of the lever is formed. Further, the other end of the pressurizing spring having one end hooked to the vehicle body is hooked to the load switching lever. The pressurizing spring has a larger elastic force than the brush lifting spring. During heavy cleaning, the load switching lever increases the ground contact load of the brush through the lever, the rod, and the brush swing arm by the pressurizing spring. Further, during normal cleaning, the load switching lever is locked to a load switching lever locking member that positions the load switching lever in a state where the elastic force of the pressure spring does not act on the brush. When lifting the brush, the load switching lever is locked to the load switching lever locking member, and the brush lifting lever is lifted to the brush lifting lever locking member to lift the brush.
[0003]
[Problems to be solved by the invention]
In the prior art, since the brush is lifted and lowered by the brush lifting lever, and the switching of the brush ground load during cleaning is performed by operating the load switching lever, there is a problem that the structure and operation are complicated. Further, since the structure is complicated, there are problems that the types of parts increase and the manufacturing cost increases. Further, when the brush is retracted, when the brush is lifted by the brush lifting lever without locking the load switching lever to the load switching lever locking member, the brush is resisted against the weight of the brush and the pressure applied to the brush. The lifting lever had to be operated, and the operating force of the brush lifting lever was increased.
The subject of this application is providing the brush support apparatus of the cleaner which can perform the raising / lowering operation of a brush and adjustment of a grounding load easily, the operation force at the time of brush raising / lowering operation is small, a structure is simple, and it is cheap.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems , the present invention supports a brush rotatably on a brush swing arm that can swing in the vertical direction with respect to the vehicle body, and connects the brush swing arm to a brush lifting lever via a connecting member. In the brush support device that lifts and lowers the brush by the brush lifting lever, the pressure reducing member that connects the brush swinging arm and the brush lifting lever through a long hole with a connecting member and applies a load to the brush lifting lever in the brush lifting direction. A pressure member that applies a load to the brush swing arm in the brush pressing direction is provided, and the brush lift lever is connected to the brush swing arm via the connecting member in the brush pulling direction. a storage position to raise the brush to the brush storage position by swinging the brush swinging arm brush pulling direction in the load of the connecting member of the pressure reducing member A pressing position for applying a load of brush own weight and the pressure member to the brush is moved to the position not acting on the brush swinging arm, acts on the brush pulling direction a load to the brush swinging arm of the decompression member via a connecting member A lever guide that is positioned at the intermediate position where the brush applies its own weight and a load smaller than the load applied by the pressure member to the brush is provided so that the brush can be moved up and down and the brush grounding load adjusted by operating the brush lift lever. (Claim 1). According to this, since the lifting / lowering operation of the brush and the adjustment of the ground contact load of the brush can be adjusted by the operation of the brush lifting / lowering lever, the operation is easy and the structure is simple and the cost is low because there is one lever.
[0005]
In the present invention, the load of the pressure reducing member acting on the brush is set larger than the load of the pressure member acting on the brush, and the resultant force acting on the brush acts in the brush pulling direction so that the brush is smaller than the weight of the brush itself. The vehicle is grounded on the road surface by a ground load (claim 2). According to this, since the resultant force acts in the direction in which the brush is lifted, the operating force when operating the elevating lever to store the brush is reduced, which is preferable.
[0006]
In addition, the present invention is such that the connecting member is pivotally attached to the brush elevating lever via the storage position adjustment mechanism, and the height of the storage position adjustment mechanism can be adjusted to adjust the brush storage position height. It is characterized (Claim 3). The invention of the present application is characterized in that a long hole for load adjustment capable of adjusting the ground contact load of the brush is provided in the brush swing arm, and a pressure member is attached to the long hole for load adjustment so that the position can be adjusted ( Claim 4). According to this, even if the brush is worn and lightened, the ground load can be adjusted so that the ground can be grounded with a substantially constant ground load.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to FIGS. The brush support device 1 includes a sweeping brush 2, left and right brush swinging arms 3 that support the sweeping brush 2 so as to be swingable in the vertical direction, and moving the sweeping brush 2 up and down in the vertical direction. It is comprised from the brush raising / lowering lever 4 which can adjust a grounding load. In the vehicle body 5 of the cleaner, an arm mounting shaft 6 is pivotally supported by a bearing 7 provided on the vehicle body 5 in the vehicle width direction, and one end side of the brush swing arm 3 is provided at each end of the arm mounting shaft 6. The shaft locking portion 3 a is attached, and the brush swing arm 3 can swing integrally with the arm mounting shaft 6. A sweeping brush 2 is rotatably supported at the other end of the left and right brush swing arms 3. The sweep brush 2 is movable in the vertical direction by swinging the brush swing arm 3 to a storage position P1 indicated by a solid line and a grounding position P2 indicated by a two-dot chain line in FIGS.
[0008]
Further, a pressure member mounting portion 8 is integrally provided on the lower side portion of the brush swinging arm 3 on the brush 2 side, which is swept up from the arm mounting shaft 6. A long hole 9 is formed. A moment adjusting bolt 22 is movably inserted in the load adjusting long hole 9 and is fixed so that the position can be adjusted by screwing a nut (not shown) from the opposite side across the pressing member mounting portion 8. . One end of a pressurizing spring 10 shown as a pressurizing member is hooked on the moment adjusting bolt 22 so that the position of one end of the pressurizing spring 10 can be adjusted along the load adjusting long hole 9. The other end of the pressurizing spring 10 is latched to a spring latching portion 11 of the vehicle body 5. The pressurizing spring 10 is a tension coil spring, and applies an elastic force in the brush pressing direction to one end side of the brush swing arm 3 to increase the ground load of the sweeping brush 2.
[0009]
A connecting pin 12 protrudes from the tip of one end of the brush swing arm 3, and the connecting pin 12 is movably fitted in a long hole 14 formed at one end of the connecting member 13 so as to swing the brush. The moving arm 3 and the connecting member 13 are connected. The other end of the connecting member 13 is pivotally attached to the distal end of the pivot base portion on one end side of the brush elevating lever 4 via the storage position adjusting mechanism 15 so that the brush elevating lever 4 and the brush swing arm 3 are directly connected. As shown in FIG. 3, the storage position adjusting mechanism 15 has a length adjusting bolt 23 welded to the connecting member 13 screwed into the rod end 24, and a screwed length between the length adjusting bolt 23 and the rod end 24. By adjusting the height, the upper end position of the long hole 14 of the connecting member 13 moves up and down, and the movement of the upper end position of the long hole 14 causes the connecting pin 12 at one end of the brush swing arm 3 fitted into the long hole 14 to move. The height position is changed, the other end of the brush swing arm 3 swings, and the retracted position height of the brush 2 is adjusted to an appropriate position. Adjustment of the screwing length between the length adjusting bolt 23 and the rod end 24 is performed by removing the pivot between the rod end 24 and the brush lifting lever 4 and rotating the rod end 24. The brush raising / lowering lever 4 is pivotally supported by a shaft 25 fixed to the vehicle body 5 at a pivot base at one end, and further, one end of a gas spring 16 as a pressure reducing member is rotatable at the tip of the pivot base. It is connected to. The other end of the gas spring 16 is rotatably provided on the vehicle body 5. As will be described later, the gas spring 16 applies a load in the brush lifting direction to the brush swing arm 3 via the brush lifting lever 4 and the connecting member 13 when the brush lifting lever 4 is at the intermediate position A2. The load larger than the elastic force of the pressurizing spring 10 is always applied downward, and the sweeping brush 2 is grounded to the road surface R with a grounding load lighter than its own weight.
[0010]
The other end of the brush elevating lever 4 is in a position where it can be operated at the driver's seat 17 and is guided by a lever guide 18 provided on the vehicle body 5. As shown in FIG. 4, the lever guide 18 has a lever storage position holding portion 19 that holds the brush lifting lever 4 in the retracted position A <b> 1 and a lever pressing position holding that holds the brush lifting lever 4 in the pressing position A <b> 3. A portion 20 is formed, and the brush elevating lever 4 is positioned at the intermediate position A2 in a free state in the middle of the guide groove 21 connecting the lever storage position holding portion 19 and the lever pressurization position holding portion 20.
[0011]
When there is little dust on the road surface R, or during normal cleaning when the road surface R is substantially flat, the operator removes the brush lift lever 4 from the retracted position A1 of the lever guide 18 at the driver's seat 17 and moves to the intermediate position A2. To. Then, the connecting member 13 moves upward, the sweeping brush 2 in the brush storage position moves to the grounding position, and the elastic force of the gas spring 16 is set larger than the elastic force of the pressurizing spring 10. The upper end of the elongated hole 14 of the connecting member 13 pushes the connecting pin 12 downward by the resultant force obtained by subtracting the load of the spring 10 for pressing from the load of the spring 16, so that an upward load acts on the other end of the brush swing arm 3. The sweeping brush 2 contacts the road surface R with a contact load smaller than the weight of the brush itself. In this state, the sweep-up brush 2 rotates, dust on the road surface R is swept up, and charged and collected in a hopper provided on the vehicle body 5 (not shown).
[0012]
When there is a lot of dust on the road surface R or when the unevenness of the road surface R is severe, the brush raising / lowering lever 4 is further pushed down to the pressure position A3. When the brush elevating lever 4 is set to the pressurizing position A3, the brush elevating lever 4 is held by the lever pressurizing position holding unit 20. Further, the connecting member 13 moves upward from the middle position, the pressure contact between the upper end of the long hole 14 and the connecting pin 12 is released, and the connecting pin 12 is positioned at the intermediate position of the long hole 14 as shown in FIG. . As a result, the load of the gas spring 16 does not act on the brush swing arm 3 via the connecting member 13, and the pressurizing member mounting portion 8 of the brush swing arm 3 is moved by the spring retaining portion 11 by the load of the pressurizing spring 10. The other end of the brush swing arm 3 is pushed down, the sweeping brush 2 at the other end of the brush swing arm 3 is pressed, and the load of the pressure spring 10 is further applied to the weight of the brush. It is possible to make contact with the road surface R with a load whose contact load is further increased and to sweep up dust on the road surface R.
[0013]
When the cleaning operation is finished and the cleaning brush 2 is lifted from the ground contact position P2 to the brush storage position P1, when the brush lift lever 4 is operated to the storage position A1, the connecting member 13 moves downward to The upper end presses the connecting pin 12 downward, and one end of the brush swing arm 3 moves downward, the other end moves upward, and the brush 2 rises and is stored in the brush storage position P1. At this time, since the load of the gas spring 16 acts in the direction of pulling up the brush 2, the operating force required for the operator to pull up the brush 2 is small. When the sweeping brush 2 is worn by cleaning and the ground load of the brush 2 is reduced, the moment adjusting bolt 22 fixed to the upper end of the load adjusting slot 9 shown in FIGS. By moving to the lower end side of the adjustment long hole 9, the distance from the arm mounting shaft at one end position of the pressurizing spring 10 is increased, the moment to the brush swing arm 3 by the pressurizing spring 10 is increased, and the sweeping brush By increasing the pressing force to 2, the ground load of the sweeping brush 2 is made substantially constant.
[0014]
The link member provided at one end of the connecting member 13 and one end of the brush swing arm 3 may be connected. In this case, the link swing member 3 and the link member are connected to the brush swing arm 3 and the brush. It becomes a connecting member that directly connects the lifting lever 3. Further, the other end of the pressurizing spring 10 may be hooked on the connecting member 13. Further, although the pressurizing spring 10 is used as the pressurizing member, the pressurizing member may be a gas spring (cylinder) or a weight. When the weight is used, for example, it is provided on a shaft member that supports the brush 2. Of course, the pressure reducing member may be a spring or the like.
[0015]
【The invention's effect】
As described above, according to the present invention, the brush swing arm and the brush lifting lever are connected to each other through the elongated hole by the connecting member, and the pressure reducing member for applying a load in the brush lifting direction to the brush lifting lever is provided. A pressure swinging member that applies a load to the moving arm in the direction of pressing the brush is provided, and the brush swinging arm is operated with the brush lifting lever acting on the brush swinging arm in the brush lifting direction via the connecting member. Is moved to the brush retracted position by swinging the brush in the brush pulling direction, and the connecting member is moved to a position where the load of the pressure reducing member does not act on the brush swinging arm, so that the weight of the brush itself and the pressure member are loaded. Pressure applied to the brush, and the load of the decompression member via the connecting member is applied to the brush swinging arm in the brush pulling direction so that the weight of the brush and the pressure unit In the lever guide is provided to position and an intermediate position for applying a smaller load than the load on the brush, since the allow the lifting operation and the ground contact load adjustment of the brush of the brush by the operation of the brush lifting levers, one brush lift lever In addition, the brush lifting operation and the brush ground load adjustment operation can be easily performed, and the structure can be simplified and the cost can be reduced. Further , according to the present invention, the load of the pressure reducing member acting on the brush is set larger than the load of the pressure member acting on the brush, and the resultant force acting on the brush acts in the brush pulling direction and is smaller than the weight of the brush itself. Since the brush is grounded with a load, the brush lifting lever can be operated with a small operating force when storing the brush. Further, according to the present invention, the connecting member is pivotally attached to the brush lifting lever via the storage position adjusting mechanism, and the height of the storage position of the brush can be adjusted by adjusting the length of the storage position adjusting mechanism. Therefore, the storage position height of the brush can be adjusted to an appropriate position. Further, according to the present invention, the brush swing arm is provided with a load adjusting long hole capable of adjusting the ground contact load of the brush, and the pressure member is attached to the load adjusting long hole so that the position of the brush can be adjusted. Even if the ground load changes due to wear, the ground load can be adjusted to a substantially constant level.
[Brief description of the drawings]
FIG. 1 is a side view showing an outline of a brush support device according to the present invention.
FIG. 2 is an enlarged side view of a brush.
FIG. 3 is an enlarged view of a part III in FIG. 1;
4 is a view as seen from IV in FIG. 1;
FIG. 5 is an explanatory diagram showing a state at a brush lifting lever pressing position.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Brush support device 2 Sweeping brush 3 Brush swing arm 4 Brush raising / lowering lever 5 Car body 9 Load adjusting long hole 10 Pressurizing spring (pressurizing member)
13 Connecting member 16 Gas spring (pressure reducing member)
18 Lever guide

Claims (4)

A brush that rotatably supports a brush on a brush swinging arm that can swing up and down with respect to the vehicle body, and that connects the brush swinging arm to a brush lift lever via a connecting member, and moves the brush up and down with the brush lift lever. In the support device, the brush swinging arm and the brush lifting lever are connected to each other through a long hole by a connecting member, and a pressure reducing member for applying a load in the brush lifting direction is provided on the brush lifting lever, and the brush pressing direction is applied to the brush swinging arm. A pressure member for applying a load to the brush is provided, and the brush lift lever is swung in the brush pulling direction with the brush lift lever acting on the brush swing arm in the brush pulling direction via the connecting member. a storage position to raise the brush to the brush storage position by moving a position of the connecting member loads the pressure reducing member does not act on the brush swinging arm A pressing position by moving the action of load of the brushes own weight and pressure member to the brush, due to the load of the vacuum member via the connecting member by acting on the brush pulling direction to the brush swinging arm brushes own weight and pressure member A brush for a cleaning machine is provided with a lever guide that is positioned at an intermediate position where a load smaller than the load is applied to the brush, so that the brush can be lifted and adjusted by adjusting the brush lifting lever. Support device. The load of the pressure reducing member acting on the brush is set to be larger than the load of the pressure member acting on the brush, and the resultant force acting on the brush acts in the brush pulling direction so that the brush contacts the road surface with a ground load smaller than the weight of the brush itself. it has to be cleaner brush supporting apparatus according to claim 1, wherein. 2. The height of the retracted position of the brush can be adjusted by pivotally connecting the connecting member to the brush lift lever via the retracted position adjusting mechanism and adjusting the length of the retracted position adjusting mechanism. Or the brush support apparatus of the cleaning machine of 2.   4. A cleaning machine according to claim 3, wherein a long hole for load adjustment capable of adjusting a ground contact load of the brush is provided in the brush swing arm, and a pressure member is attached to the long hole for load adjustment so that the position of the pressure adjustment member can be adjusted. Brush support device.

Images