JP4324801B2 - Suction duct switching device for cleaning machine - Google Patents

Description

  The present invention relates to a suction duct switching device of a cleaning machine that switches opening and closing of a suction duct that connects a filter chamber and a blower in a cleaning machine.

A conventional suction duct switching device for a cleaner is disclosed in Patent Document 1. The suction duct connecting the filter chamber and the blower is provided with a valve member for opening and closing the suction duct. An operation member is connected to the valve member via a link member. The operating member is rotatable from the first position to the third position, the valve member is opened at the first position, the valve member is closed at the second position, and the valve member is closed at the third position. A switch for operating the dust removing device can be turned on, and the opening and closing of the valve member and the switch operation of the dust removing device can be performed with one operation member. The link member includes a first spring and a second spring. The second spring biases the valve member to open when the operating member is in the first position, and biases the valve member to close when the operating member is in the second position. The first spring maintains a certain length when the operating member is in the range between the first position and the second position, expands when the operating member is in the third position, and returns the operating member to the second position. Energize in the direction.
JP-A-11-93128

In the suction duct opening / closing device of the cleaning machine disclosed in Patent Document 1, when the operating member is rotated from the first position to the second position in order to open or close the suction duct, it is erroneously rotated to the third position. There is a problem of turning on the switch, and there is a problem of operating the dust removal device even when the operation of the dust removal device is unnecessary when temporarily stopping the suction of dust such as during transport. Further, when the operating member is rotated to the third position, the first spring is extended. However, since the first spring is set to be equal to or higher than the tension of the second spring, a large operating force is required when operating the operating member. There was a problem we needed. Further, the valve member opens and closes the suction duct, and connects and disconnects the filter chamber and the blower. If the sealing performance by the valve member of the suction duct is poor when it is not connected, the suction duct and the valve member Since air is sucked from the filter chamber through the gap, there is a problem that the noise caused by the sucked airflow is large and noisy. In addition, since the air in the filter chamber is sucked from the gap, even if the dust removal device is operated and the dust is dropped from the filter, the dropped dust is sucked and reattached to the filter, which reduces the dust removal effect. It was.
According to the present invention, the operation member can be surely positioned at the operation position where the valve member is in the communication state or the non-communication state, the malfunction of the dust removing device can be prevented when the operation member is operated, and the operation member can be manually operated easily The present invention provides a suction duct switching device for a cleaning machine that can be easily used.

  The suction duct switching device of the cleaning machine of the present invention sucks the air in the hopper chamber through the filter and the suction duct with the blower, removes dust in the air with the filter, and shakes off the dust adhering to the filter with the dust removing device. In the cleaning machine configured as described above, a valve member that switches between a communication state in which the blower communicates with the filter chamber and a non-communication state in which the blower does not communicate with the filter chamber, and can be manually switched between the first position and the second position. And an operation member provided so as to be tiltable to a second position and a third position. The operation member and the valve member are in communication with each other at the first position of the operation member, and the second of the operation member A position return member for connecting the valve member so as to be in a non-communication state at a position, and automatically returning the operation member from the third position to the second position and holding the posture at the second position; And a switch for operating the dust removal device when the operation member is located at the third position, and the operation member is tilted to the third position at the second position in a direction perpendicular to the rotation direction to operate the dust removal device. It is characterized by doing so.

  Preferably, the valve body connected to the suction duct is provided with a hole communicating with the atmosphere and a hole communicating with the filter chamber, and is supported by a valve member that selectively opens and closes the two holes.

  Further preferably, a support hole provided in the operation member is inserted into the support shaft so that the operation member is rotatably supported by the support shaft, and the operation member is tilted in a direction perpendicular to the rotation direction. The posture return member is configured by forming a larger diameter than the support shaft diameter so that the operation shaft is pressed against the posture holding member provided on the support shaft and returning the posture to the support shaft. It is characterized by.

  Further, the present invention is characterized in that a play that allows tilting of the operating member is provided in the connecting portion between the operating member and the link member and the connecting portion between the link member and the valve member.

  According to the invention of the present application, the operation member is supported so as to be able to be switched between the first position and the second position, and can be tilted in the rotation direction and the orthogonal direction of the operation member between the second position and the third position. By switching the rotation between the first position and the second position, the suction duct is switched between the communication state and the non-communication state by the valve member connected to the operation member, and the tilt switching is performed between the second position and the third position. Since the switch for operating the dust removal device is turned on and off, that is, the operation direction between the first position and the second position of the operation member and the operation direction between the second position and the third position are different by 90 °. As described in the problem to be solved by the present invention at the time of the rotation operation, it is possible to prevent the dust removing device from being erroneously operated, and it is possible to reliably switch each operation by the operation member.

  Further, the operation member at the third position is automatically returned to the second position by the posture return member and is held at the second position. This automatic return is performed by the posture holding member being urged by the posture holding member, but the urging force of the return spring may be a small force that can press the operation member against the posture holding member. It can be operated with a manual operation.

  In addition, the valve member selectively opens and closes the hole that communicates the suction duct with the atmosphere and the hole that communicates with the filter chamber. Therefore, when the filter chamber and the blower are closed by the valve member, the suction duct communicates with the atmosphere. Even if the sealing performance of the suction duct by the member is not high, air is preferentially sucked from the hole communicating with the suction duct into the atmosphere, so the hole communicating with the filter chamber is not sealed by the valve member and formed between them. No noise is generated when air is sucked from a narrow gap, and no suction airflow from the filter chamber to the blower is generated, so that dust dropped from the filter by the dust removing device is prevented from adhering to the filter again. Can be removed and has good dust removal effect.

  Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an overall configuration of a road cleaning vehicle 1 as a cleaning machine. The road cleaning vehicle 1 is provided with a front wheel 3 and a rear wheel 4 before and after a vehicle body 2, a side brush 5 for scavenging dust is provided on the side of the front wheel 3, A sweeping device 10 is provided that sweeps and collects dust collected by the side brush 5 into a hopper chamber (dust collecting chamber) 9 of a hopper 8 at the rear of the vehicle body by a main brush 6 and an elevator 7. The hopper 8 has a filter chamber 11 above the hopper chamber 9, and the filter chamber 11 communicates with the blower 13 through a suction duct 12. The filter chamber 11 is provided with a filter device 16 including a filter 14 and a dust removing device 15. The filter device 16 has substantially the same configuration as that disclosed in JP-A-2002-95615. The filter 14 removes dust in the polluted air in the hopper chamber 9 sucked by the blower 13. The dust removing device 15 rotates an eccentric weight by a motor to vibrate the bracket, and vibrates the entire filter to shake off dust adhering to the filter.

  Further, the road cleaning vehicle 1 is provided with a suction duct switching device 17 shown in FIG. 2 and subsequent figures. Next, the suction duct switching device 17 will be described. As shown in FIGS. 1 and 2, the suction duct 12 and the filter chamber 11 are connected via a valve body 18. As shown in FIG. 4, a hole 20 communicating with the suction duct 12 is formed in the duct connecting portion 19 of the valve body 18, and a hole 22 communicating with the filter chamber 11 is formed in the hopper connecting portion 21. The front surface of the valve body 18 in the front-rear direction of the vehicle body 2 is open, and is formed with a hole 23 communicating with the atmosphere substantially perpendicular to the hole 22 communicating with the filter chamber 11. In the valve body 18, the hopper connecting portion 21 is connected to the filter chamber 11 in a state where the duct connecting portion 19 is connected to the suction duct 12 and the suction port 25 of the hopper 8 is pressed into contact with the seal member 24 attached to the hopper connecting portion 21. The suction duct 12 and the filter chamber 11 are communicated with each other. The valve body 18 is screwed to a bracket 26 erected on the vehicle body 2 so as to be position-adjustable through a long hole 27 of the bracket 26 (FIG. 4).

  As shown in FIG. 5, a pivot shaft 29 is pivotally supported on the valve body 18 between both side walls 28, 28 in the vehicle width direction. As shown in FIG. As shown in FIG. 4, one end of the swing member 30 is fixed to one end of the rotating shaft 29. A connecting bolt 32 as a connecting shaft to which one end of the position holding spring 31 is connected is screwed to the other end of the swing member 30. A connecting bolt 33 to which the other end of the position holding spring 31 is connected is screwed to the partition wall 46. A position holding spring 31 is stretched between the connection bolts 32 and 33, and the position holding spring 31 holds an operation member 34 (described later) in either the first position A or the second position B via the valve member 35. To do. The upper end portion of the inner plate 36 of the valve member 35 is welded to the rotation shaft 29, and the valve member 35 rotates about the rotation shaft 29 so that the hole 23 and the filter chamber 11 communicate with the atmosphere. The communicating hole 22 can be selectively opened and closed. As shown in FIG. 4, the valve member 35 has a rubber seal member 38 sandwiched between an inner plate 36 and an outer plate 37 and is screwed by a plurality of clamping bolts 39.

  The outer peripheral portion of the seal member 38 extends to the outer side from the outer periphery of the outer plates 36 and 37, and the valve member 35 opens the hole 22 communicating with the filter chamber 11 of the valve body 18 as shown in FIG. When the hole 23 communicating therewith is closed, the outer peripheral portion of the seal member 38 is in pressure contact with the inner peripheral surface of the hole 23 communicating with the atmosphere of the valve body 18 so that the valve member 35 is sealed. The suction duct 12 is shut off from the atmosphere, and the valve member 35 closes the hole 22 communicating with the filter chamber 11 of the valve body 18 as shown in FIG. 3 and opens the hole 23 communicating with the atmosphere. In some cases, the seal member 38 closes the hole 22 communicating with the filter chamber 11, and the valve member 35 is configured to block the suction duct 12 from the filter chamber 11. The inner side surface of the upper end portion of the inner plate 36 is welded to the rotating shaft 29, and the connecting member 40 is suspended from the outer side surface, and is inserted through the square holes 41 and 42 formed in the seal member 38 and the outer plate 37. is doing. The connecting member 40 is connected to one end of the first link 44 included in the link member 43 so as to be relatively rotatable.

  As shown in FIG. 1, an operation member (operation lever) 34 is provided in the vicinity of the driver's seat 45 of the road cleaning vehicle 1. As shown in FIGS. 7 to 9, one end of a support shaft 47 is fixed to the partition wall 46. A posture holding member 48 is provided at the other end of the support shaft 47, and the posture holding member 48 is formed to have a larger diameter than the support shaft 47 and includes a flange portion 49. The operation member 34 is formed with a support hole 50 having a diameter larger than the outer diameter of the support shaft 47 at an intermediate portion, and is supported rotatably by the support shaft 47 by inserting the support hole 50 into the support shaft 47. . The support hole 50 allows the operation member 34 to tilt in a direction orthogonal to the rotation direction of the operation member 34 (that is, the vehicle width direction). A return spring 51 is externally mounted on the support shaft 47 so as to be positioned between the partition wall 46 and the operation member 34. The return spring 51 is for returning the posture by pressing the operating member 34 tilted in the direction orthogonal to the rotation direction to the flange portion 49 of the posture holding member 48. The posture holding member 48 is used to return the posture return member 52. It is composed. The lower end of the operation member 34 is coupled to one end of the second link 53 included in the link member 43 so as to be rotatable. The other end of the second link 53 is connected to a long hole 54 at the other end of the first link 44 so that the position of the second link 53 can be adjusted in the longitudinal direction of the link member. The connecting portion between the operating member 34 and the second link 53 and the connecting portion between the first link 44 and the connecting member 40 or the connecting portion between the operating member 34 and the second link 53 or the connecting portion between the first link 44 and the connecting member 40. One of them is provided with a play that allows tilting of the operation member 34, that is, a play.

  With the above-described structure, the operation member 34 is connected to the valve member 35 via the link member 43, thereby closing the hole 23 that allows the valve member 35 to communicate with the atmosphere as shown in FIG. The first position A is switched to a communication state where the blower 13 and the filter chamber 11 are communicated with each other, and the hole 23 communicating the valve member 35 with the atmosphere is opened as shown in FIG. 11 can be turned to a second position B where the hole 22 communicating with 11 is closed and the blower 13 and the filter chamber 11 are not communicated. Further, the operation member 34 resists the urging force of the return spring 51 and pushes the actuator 56 of the switch 55 for operating the dust removing device 15 from the second position B as shown by a two-dot chain line in FIG. It can be tilted to the third position C, and is automatically returned from the third position C to the second position B by the return spring 51, and the posture is brought to the second position B by the return spring 51 and the posture holding member 48. Retained.

  A guide member 57 is provided on the partition wall 46. As shown in FIG. 6, the switch 55 is provided on the lower surface of the guide member 57. As shown in FIGS. 7 and 8, the guide member 57 is formed with a guide hole 58, and the guide hole 58 has a first position A and a second position B in the rotational direction of the operation member 34. Between the second position B and the third position C in a direction perpendicular to the rotation direction. And a tilt direction guide portion 60 for guiding. When the operation member 34 is manually operated to the first position A, the second position B, and the third position C by the guide hole 58, the operation member 34 is connected to the first position side end 59a and the second position side end of the guide hole 58. The rotation and tilting are restricted by 59b and the third position side end 60a.

  As shown in FIG. 2, when the operation member 34 is manually operated to the first position A, the valve member 35 is in a communication state. At this time, the position holding spring 31 urges the swing member 30 from the position beyond the dead point in the direction of the hole 23 (clockwise direction) communicating with the atmosphere in FIG. 23, the operation member 34 is urged toward the first position side end 59a of the rotation direction guide portion 59, and the operation member 34 abuts on the first position side end 59a to contact the valve member 35. Is kept in communication. In this state, the air in the hopper chamber 9 is sucked by the operation of the blower 13.

  Next, when the operation member 34 is manually rotated from the first position A to the second position B, the valve member 35 is in a non-communication state. At this time, the position holding spring 31 urges the oscillating member 30 from the position beyond the dead point in the direction of the hole 22 (counterclockwise) communicating with the filter chamber 11 in FIG. The operation member 34 is urged toward the second position side end 59b of the rotation direction guide portion 59, and the valve member 35 is held in a non-communication state. In this state, the blower 13 sucks the air preferentially from the hole 23 communicating with the air, so that the air in the hopper chamber 9 is not sucked and the air flow in the hopper chamber 9 becomes stationary. When the operating member 34 is manually tilted from the second position B to the third position C, the operating member 34 pushes the actuator 56 and turns on the switch 55 to activate the dust dropping device 15 to efficiently remove dust from the filter 14. Shake off. When the operation member 34 is released, the operation member 34 is automatically returned from the third position C to the second position B by the posture return member 52 and the posture is held at the second position B, and the operation member 34 is separated from the actuator 56. As a result, the switch 55 is turned off and the dust removing device 15 is stopped.

It is explanatory drawing which shows the road surface cleaning vehicle provided with the suction duct switching apparatus of this invention. It is a side view which shows a suction duct switching device in a communication state. It is a side view which shows a suction duct switching apparatus in a non-communication state. It is a side view which shows a valve main body. It is a top view which shows a valve main body. It is a side view which shows an operation member. FIG. 7 is a VII view of FIG. 6. It is a top view which made the operation member the 2nd position. It is an enlarged plan view which made the operation member the 3rd position.

Explanation of symbols

1 Road sweeper (cleaning machine)
DESCRIPTION OF SYMBOLS 9 Hopper chamber 11 Filter chamber 12 Suction duct 13 Blower 14 Filter 15 Dust removal device 17 Suction duct switching device 18 Valve body 22 Hole communicating with filter chamber 23 Hole communicating with air 34 Operation member 35 Valve member 43 Link member 47 Support Shaft 48 Posture holding member 50 Support hole 51 Return spring 52 Posture return member 55 Switch A 1st position B 2nd position C 3rd position

Claims (4)

In a cleaner configured to suck air in a hopper chamber through a filter and a suction duct with a blower, remove dust in the air with the filter, and shake off dust adhering to the filter with a dust removing device. A valve member for switching between a communication state for communication with the filter chamber and a non-communication state for disconnecting the blower from the filter chamber, and a shaft member that is pivotally switchable between the first position and the second position manually, and the second position and the third position. An operation member provided so as to be tiltable, and the valve member is in communication with the operation member and the valve member at the first position of the operation member, and the valve member is in non-communication at the second position of the operation member. A link return member is provided to provide a posture return member for automatically returning the operation member from the third position to the second position and holding the posture at the second position, and when the operation member is located at the third position. A suction duct for a cleaning machine comprising a switch for operating the dropping device, wherein the dusting device is operated by tilting the operating member at the second position to the third position in a direction perpendicular to the rotation direction. Switching device. The valve body connected to the suction duct is provided with a hole communicating with the atmosphere and a hole communicating with the filter chamber, and a valve member for selectively opening and closing the two holes is pivotally supported. A suction duct switching device for a cleaning machine as described. A support hole provided in the operation member is inserted into the support shaft, and the operation member is rotatably supported by the support shaft. The support hole of the operation member is supported so that the operation member can be tilted in a direction perpendicular to the rotation direction. A posture return member is formed by mounting a return spring on the support shaft, which is formed to have a larger diameter than the shaft diameter and presses the operating member against a posture holding member provided on the support shaft to return the posture. Item 3. A suction duct switching device for a cleaning machine according to item 1 or 2. The suction duct of the cleaning machine according to any one of claims 1 to 3, wherein a play allowing the tilting of the operation member is provided at a connection portion between the operation member and the link member and a connection portion between the link member and the valve member. Switching device.

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