Hand guide roller

Abstract

To provide a hand guide roller having an extremely reliable safety means with a simple structure.SOLUTION: In a stop mode in which an electric motor is stopped, a position of a travel lever 6 and a situation of a safety lever 7 are monitored, and when the safety lever 7 is operated in a state where the travel lever 6 is at a neutral position, a control mode shifts to a start mode and the electric motor rotates. In the starting mode, the position of the travel lever 6, the state of the safety lever 7, and the number of revolutions of the electric motor are monitored, and when the number of revolutions of the electric motor exceeds a set value while the safety lever 7 is maintained in the operating state, the control mode shifts to the travel mode, and in the travel mode, when the safety lever 7 is maintained in the operating state and the travel lever 6 is set to the forward position, the machine body travels forward, and when the safety lever 7 is set to the backward position, the machine body travels backward, and when the safety lever 7 is in the non-operating state, the electric motor stops and shifts to the stop mode.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vibratory roller used for compacting paved surfaces and ground surfaces, and more particularly to a hand-guided vibratory roller (hand-guided roller). [Background technology]

[0002] A typical hand guide roller is configured so that the forward and backward movement of the machine is controlled by a travel lever located on the operating handle. Specifically, when the travel lever is tilted forward, the machine moves forward; when tilted backward, the machine moves backward; and when the travel lever is set to the neutral position, the machine stops.

[0003] To ensure the safety of the operator, a hand guided roller equipped with a safety device (JIS standard A8508: hold-to-run control device) is also known, which automatically returns the travel lever to a neutral position when the operator lets go of the lever, thereby stopping the machine (Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-240256 [Patent Document 2] Japanese Patent Application Laid-Open No. 2014-163087 [Patent Document 3] Japanese Patent Application Laid-Open No. 2014-136890 [Patent Document 4] Japanese Patent Publication No. 2022-168487 [Patent Document 5] Japanese Patent Publication No. 2024-015536 Summary of the Invention [Problem to be solved by the invention]

[0005] Many conventional safety devices used in hand guide rollers have complex configurations, and are often configured such that when the operator releases the safety lever, a biasing means on the safety device applies a biasing force to the travel lever, returning the travel lever to the neutral position. Therefore, if a malfunction occurs in the safety device, for example, if the biasing force applied to the travel lever is insufficient, the travel lever may not be able to be properly returned to the neutral position.

[0006] The present invention is intended to solve the problems associated with the prior art, and has an object to provide a hand guide roller that has a simple configuration yet is equipped with an extremely reliable safety mechanism. [Means for solving the problem]

[0007] The hand guide roller of the present invention has an electric motor and a battery mounted on the body to supply propulsion to the roller, a travel lever for operating the forward and backward movement of the body, and a safety lever for ensuring the safety of the operator, and the safety lever is biased to rotate or move to one side, and in stop mode where the electric motor is stopped, the position of the travel lever and the status of the safety lever are monitored, and when the safety lever is operated with the travel lever in the neutral position, the control mode shifts to start mode and the electric motor rotates, and in start mode the position of the travel lever, the status of the safety lever, and the number of rotations of the electric motor are monitored, and the travel lever is maintained in the neutral position and the safety lever is biased to rotate to one side. When the rotation speed of the electric motor exceeds a set value while all levers are maintained in an operated state, the control mode switches to a traveling mode, and in the traveling mode, the status of the safety lever is monitored. When the traveling lever is set to the forward position while the safety lever is maintained in an operated state, forward thrust is supplied from the electric motor to the rollers, causing the vehicle to move forward; when the traveling lever is set to the reverse position, backward thrust is supplied to the rollers, causing the vehicle to move backward; and when the traveling lever is set to the neutral position, no thrust is supplied to the rollers, causing the vehicle to stop; and when the safety lever is not operated in the traveling mode, the electric motor stops and the system switches to a stop mode.

[0008] In addition, in the start mode, it is preferable that when the safety lever is released before the rotation speed of the electric motor exceeds a set value, the electric motor is stopped and the mode is changed to the stop mode.

[0009] It is also preferable that the device has a first proximity sensor that can detect when a target approaches within a specified detection range, and that the first proximity sensor is positioned at a position where the target exceeds the boundary of the detection range when the safety lever transitions from a non-operated state to an operated state, and from an operated state to a non-operated state, so that it can detect whether the safety lever is in an operated state or a non-operated state.In this case, it is preferable that an interlocking member is positioned between the first proximity sensor and the safety lever, and that when the safety lever is operated, the interlocking member is pushed toward the first proximity sensor, and the target of the first proximity sensor attached to the tip of the interlocking member is adjusted to be positioned within the detection range of the first proximity sensor.

[0010] The vehicle also preferably has a second proximity sensor that can detect when a target approaches within a specified detection range. The second proximity sensor is preferably positioned so that the target exceeds the boundary of the detection range when the travel lever is shifted from the neutral position to the forward or reverse position, and from the forward or reverse position to the neutral position, so that it can detect whether the travel lever is in the neutral position. In this case, the target of the second proximity sensor is preferably attached to a driven lever that rotates integrally with the travel lever, and is preferably adjusted so that the target is within the detection range of the second proximity sensor when the travel lever is in the neutral position, and is outside the detection range of the second proximity sensor when the travel lever is in the forward or reverse position. [Effects of the Invention]

[0011] The hand guide roller according to the present invention has a simple structure, yet can be expected to have extremely high reliability and safety. More specifically, if the operator accidentally releases his / her hand from the safety lever while the vehicle is traveling, the vehicle can be stopped quickly. Furthermore, even if the operator operates the safety lever when the vehicle is stopped with the travel lever set to the forward or reverse position, the vehicle will remain stopped, thereby avoiding a dangerous situation in which the vehicle starts moving forward or backward against the operator's will the moment the safety lever is operated. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a side view of a hand guide roller 1 according to the present invention. [Figure 2] FIG. 2 is a diagram showing the internal and external structures of the housing 51 of the operating handle 5 shown in FIG. [Figure 3] FIG. 3 is a diagram showing the internal and external structures of the housing 51 of the operating handle 5 shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the "hand guide roller" of the present invention will be described with reference to the accompanying drawings. Fig. 1 is a side view of a hand guide roller 1 according to the present invention. This hand guide roller 1 is used for compacting road pavement surfaces and ground surfaces, and is composed of a machine body 2 equipped with an electric motor (prime mover) and a battery, a pair of front and rear rollers 3, a handle stay 4 attached to the rear side of the machine body 2 (right side in Fig. 1), and an operating handle 5 located at the tip (rear end) of the handle stay 4.

[0014] 2 and 3 are diagrams showing the internal and external structures of the housing 51 of the operating handle 5 shown in Fig. 1. As shown, a travel lever 6 and a safety lever 7 are attached to the housing 51 of the operating handle 5. In addition, a handle grip 8 is arranged so as to surround the front, top, and rear of the housing 51.

[0015] The travel lever 6 is used to operate the forward and backward movement of the machine body 2 (see FIG. 1). Specifically, as shown in FIGS. 2 and 3, a pivot shaft 61 that is rotatably supported and a driven lever 62 that is fixed to the pivot shaft 61 are arranged inside the housing 51 of the operating handle 5. The driven lever 62 is connected to a control means (not shown) of the machine body 2 via a push-pull cable 16. The travel lever 6 is fixed to the pivot shaft 61 on the outside of the housing 51. When the travel lever 6 is rotated, the driven lever 62 rotates integrally inside the housing 51. The movement of the travel lever 6 is transmitted to the control means via the push-pull cable 16, and the machine body 2 can be operated to move forward or backward.

[0016] More specifically, in the "travel mode" described below, when the travel lever 6 is tilted forward (to the position shown by the solid line in FIG. 3) from the position shown in FIG. 2 (neutral position) (set to the forward position), forward thrust is supplied from the electric motor to the rollers 3 (see FIG. 1), causing the machine body 2 to move forward. When the travel lever 6 is tilted to the opposite side (to the position shown by the dashed line in FIG. 3) (set to the reverse position), backward thrust is supplied to the rollers 3, causing the machine body 2 to move backward. Note that when the travel lever 6 is in the neutral position, no thrust is supplied to the rollers 3. Therefore, when the travel lever 6 is set to the neutral position during travel, the machine body 2 stops.

[0017] On the other hand, the safety lever 7 is intended to ensure the safety of the operator, and the machine body 2 can only travel when the safety lever 7 is operated, and is configured so that if the operator releases the safety lever 7 while the machine body 2 is traveling, the machine body 2 will stop (safety mechanism for hand guide roller). The safety mechanism including this safety lever 7 will be described in detail below.

[0018] Two proximity sensors (a first proximity sensor 18 and a second proximity sensor 19) are arranged inside the housing 51 of the operating handle 5. These proximity sensors 18, 19 are connected to the control means via a network (a serial communication protocol such as CAN), and are configured to detect a target (detection object) (an iron member in this embodiment) approaching within a specified detection range (for example, within 5 mm) and become energized, and to become de-energized when a target is not detected within the specified detection range.

[0019] First proximity sensor 18 is fixed on the bottom of housing 51 and is configured to be able to detect the state (operated state / non-operated state) of safety lever 7. More specifically, safety lever 7 is located at the rear outside of housing 51 and is configured so that a grip portion 71 on its upper side and a lower end portion 72 on its lower side can rotate within a predetermined angular range around a pivot point 73. In addition, an interlocking member 9 is disposed between first proximity sensor 18 and safety lever 7.

[0020] The interlocking member 9 is configured to be slidable in the front-to-rear direction of the machine body 2 (left-to-right direction in Figures 2 and 3) on the bottom of the housing 51, and is biased toward the safety lever 7 side (right side in Figures 2 and 3) by a spring 17 (biasing means). A target 92 (iron member) of the first proximity sensor 18 is attached to the tip of the interlocking member 9, and a rear end 93 of the interlocking member 9 is configured to penetrate the housing 51 and protrude outward, coming into contact with the lower end 72 of the safety lever 7.

[0021] Therefore, when the safety lever 7 is not being operated (when the operator is not touching it), the lower end 72 is pushed rearward (to the right in Figure 2) by the rear end 93 of the interlocking member 9, and conversely, the gripping portion 71 is maintained in a rotated forward position (the position shown in Figure 2).

[0022] When the safety lever 7 is operated from this state, that is, when the operator grasps the handle portion 71 of the safety lever 7 together with the rear portion 81 of the handle grip 8 and tilts (or moves) it rearward (to the right in Figure 3) as shown in Figure 3, the lower end portion 72 of the safety lever 7 rotates forward, and the interlocking member 9 is pushed forward (towards the first proximity sensor 18).

[0023] The safety mechanism of the hand guide roller of this embodiment is adjusted so that the target 92 of the first proximity sensor 18 is located outside the detection range of the first proximity sensor 18 when the safety lever 7 shown in Figure 2 is not operated, and is located within the detection range of the first proximity sensor 18 when the safety lever 7 shown in Figure 3 is operated.

[0024] In other words, when the safety lever 7 transitions from a non-operated state to an operated state, or from an operated state to a non-operated state, the target 92 crosses the boundary of the detection range of the first proximity sensor 18 and advances inward or retreats to the outside, thereby making it possible to detect the status of the safety lever 7 (operated state / non-operated state).

[0025] As described above, when the target 92 approaches within the specified detection range, the first proximity sensor 18 detects this and becomes energized, and the fact that the safety lever 7 is in an operated state is transmitted to the control means via the network, and when the target 92 moves out of the specified detection range, the first proximity sensor 18 becomes de-energized, and the fact that the safety lever 7 is in a non-operated state is transmitted to the control means.

[0026] Meanwhile, second proximity sensor 19 is fixed to the side of housing 51 and is configured so that a target 63 (an iron member) is positioned beyond the boundary of its detection range when the travel lever 6 is shifted from the neutral position to the forward or reverse position, or from the forward or reverse position to the neutral position, thereby detecting whether the travel lever 6 is in the neutral position. More specifically, target 63 of second proximity sensor 19 is attached to the tip of driven lever 62, which rotates integrally with travel lever 6. When travel lever 6 is in the neutral position shown in Figure 2, target 63 is within the detection range of second proximity sensor 19. When travel lever 6 is in the position shown by the solid line in Figure 3 (forward position) or the position shown by the dashed line in Figure 3 (reverse position), target 63 is outside the detection range of second proximity sensor 19.

[0027] Therefore, when the target 63 is within the detection range, the second proximity sensor 19 detects this and becomes energized, and the fact that the travel lever 6 is in the neutral position (see Figure 2) is transmitted to the control means via the network.When the target 63 is outside the detection range, the second proximity sensor 19 becomes de-energized, and the fact that the travel lever 6 is in the forward or reverse position (see Figure 3) is transmitted to the control means.

[0028] In the hand guide roller of this embodiment, when the electric motor that supplies the propulsive force to the roller 3 (see FIG. 1) is stopped (stop mode), if an appropriate operation is performed, the control mode shifts to "start mode" and the electric motor starts. Then, when the rotation speed of the electric motor exceeds a set value, the control mode shifts from "start mode" to "running mode" and the roller becomes ready to run.

[0029] More specifically, in "stop mode," the control means monitors the position of the travel lever 6 (neutral position / forward position or reverse position) and the status of the safety lever 7 (operated / not operated). The conditions for transitioning from "stop mode" to "start mode" are that "the travel lever 6 is in the neutral position" and "the safety lever 7 is in the operated state." Therefore, if the travel lever 6 is set to the forward position or reverse position shown in FIG. 3, operating the safety lever 7 will not transition to "start mode," and the electric motor will not start (the machine body 2 will remain stationary). Furthermore, even if the travel lever 6 is in the neutral position, the machine will not transition to "start mode" unless the safety lever 7 is operated.

[0030] When the safety lever 7 is operated while the travel lever 6 is in the neutral position (when the grip 71 is rotated rearward as shown in FIG. 3), the first proximity sensor 18 and the second proximity sensor 19 detect that the travel lever 6 is in the neutral position and that the safety lever 7 is in the operated state, and this information is transmitted to the control means via the network. Then, the control mode changes from "stop mode" to "start mode."

[0031] When the mode shifts to "start mode," drive power is supplied to the electric motor, causing the electric motor to start (rotate). The rotation speed of the electric motor can be adjusted appropriately within the range of 1400 to 2500 rpm by operating a rotation speed adjustment knob (not shown).

[0032] In the "start mode," the control means monitors the position of the travel lever 6, the state of the safety lever 7, and the rotation speed of the electric motor. When the rotation speed of the electric motor exceeds a set value (1,000 rpm in this embodiment) while the travel lever 6 is maintained in the neutral position and the safety lever 7 is maintained in an operated state, the control mode transitions from the "start mode" to the "travel mode." Note that in the "start mode," if the safety lever 7 is released or the travel lever 6 is moved to the forward or reverse position before the rotation speed of the electric motor exceeds the set value, the mode does not transition to the "travel mode," but instead the electric motor stops and the mode transitions to the "stop mode."

[0033] In the "travel mode," the control means monitors the state of the safety lever 7. When the travel lever 6 is set to the forward position while the safety lever 7 is maintained in an operated state, forward thrust is supplied from the electric motor to the rollers 3 (see FIG. 1), causing the machine body 2 to move forward, and when the travel lever 6 is set to the reverse position, backward thrust is supplied to the rollers 3, causing the machine body 2 to move backward.

[0034] Furthermore, if the travel lever 6 is set to the neutral position while traveling, no propulsion force is supplied to the rollers 3, and the machine body 2 stops. However, as long as the safety lever 7 is kept in the operated state, the electric motor continues to rotate, and if the travel lever 6 is set to the forward or reverse position from this state, the machine body 2 will again move forward or reverse.

[0035] In "travel mode," if the safety lever 7 is released, the electric motor stops and the control mode transitions to "stop mode," regardless of whether the travel lever 6 is set to the neutral position, forward position, or reverse position. Therefore, if the safety lever 7 is released while traveling, the machine 2 stops.

[0036] The hand guide roller according to this embodiment is equipped with the safety mechanism described above, and therefore can safely perform compaction work on road pavements and ground surfaces. More specifically, if the operator accidentally releases his / her hand from the safety lever 7 while the vehicle 2 is traveling, the vehicle 2 can be stopped quickly. Furthermore, even if the operator operates the safety lever 7 when the vehicle 2 is stopped with the travel lever 6 set to the forward or reverse position, the vehicle 2 will remain stopped, thereby avoiding a dangerous situation in which the vehicle 2 starts moving forward or backward against the operator's will the moment the safety lever 7 is operated. [Explanation of symbols]

[0037] 1: Hand guide roller, 2: Aircraft, 3: Laura, 4: Handle stay, 5: Operating handle, 51: Housing, 6: Travel lever, 61: Rotating shaft, 62: driven lever, 63: Target, 7: Safety lever, 71:Gripping part, 72: Bottom end, 73: pivot point, 8: Handle grip, 81: Rear, 9: Interlocking member, 92: Target, 93: Rear end, 16: Push-pull cable, 17: Spring, 18: First proximity sensor, 19: Second proximity sensor

Claims

1. A hand guide roller in which an electric motor and a battery for supplying propulsion force to the roller are mounted on the machine body, It has a travel lever for operating the forward and backward movement of the aircraft and a safety lever for ensuring the safety of the pilot. The safety lever is biased to pivot or move to one side, In the stop mode in which the electric motor is stopped, the position of the travel lever and the state of the safety lever are monitored, and when the safety lever is operated while the travel lever is in the neutral position, the control mode transitions to the start mode and the electric motor rotates, In the start mode, the position of the travel lever, the state of the safety lever, and the rotation speed of the electric motor are monitored, and when the rotation speed of the electric motor exceeds a set value while the travel lever is maintained in a neutral position and the safety lever is maintained in an operated state, the control mode is switched to the travel mode; In the traveling mode, the state of the safety lever is monitored, and when the traveling lever is set to the forward position while the safety lever is kept in an operating state, forward thrust is supplied from the electric motor to the rollers, causing the machine to move forward; when the traveling lever is set to the reverse position, rearward thrust is supplied to the rollers, causing the machine to move backward; and when the traveling lever is set to the neutral position, no thrust is supplied to the rollers, causing the machine to stop; A hand guide roller characterized in that, in a traveling mode, when a safety lever is not operated, the electric motor is stopped and the mode is changed to a stop mode.

2. 2. The hand guide roller according to claim 1, wherein in the start mode, when the safety lever is released before the rotation speed of the electric motor exceeds a set value, the electric motor stops and the mode shifts to the stop mode.

3. a first proximity sensor capable of detecting a target when the target approaches within a specified detection range; 2. The hand guide roller according to claim 1, wherein the first proximity sensor is arranged at a position where the target exceeds the boundary of the detection range when the safety lever transitions from a non-operated state to an operated state, and when the safety lever transitions from an operated state to a non-operated state, so that the first proximity sensor is configured to detect whether the safety lever is in an operated state or a non-operated state.

4. an interlocking member is disposed between the first proximity sensor and the safety lever; A hand guide roller as described in claim 3, characterized in that when the safety lever is operated, the interlocking member is pushed toward the first proximity sensor, and the target of the first proximity sensor attached to the tip of the interlocking member is adjusted to be positioned within the detection range of the first proximity sensor.

5. a second proximity sensor capable of detecting a target when the target approaches within a specified detection range; 2. The hand guide roller according to claim 1, wherein the second proximity sensor is arranged at a position where the target exceeds the boundary of the detection range when the travel lever is shifted from the neutral position to the forward position or the reverse position, and when the travel lever is shifted from the forward position or the reverse position to the neutral position, so that the second proximity sensor is configured to detect whether the travel lever is in the neutral position.

6. 6. The hand guide roller according to claim 5, wherein the target of the second proximity sensor is attached to a driven lever that rotates integrally with the travel lever, and is adjusted so that the target is located within the detection range of the second proximity sensor 19 when the travel lever is in the neutral position, and is located outside the detection range of the second proximity sensor 19 when the travel lever is in the forward position or reverse position.

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