JP2017030924A - Remote controller and on-work machine crane having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a remote controller having a trigger mechanism that is hardly affected by water and dust.SOLUTION: A remote controller 30 comprises: a grip part 31; an operation part 32 provided at an upper position of the grip part 31, in which a plurality of operation switches 41-47 are disposed; and a trigger support part provided on a lower surface side of the operation part 32 for supporting a speed adjustment trigger lever rotatably. The trigger support part comprises a storage recess storing the trigger lever from a base end part to a middle portion and supporting both ends of a support shaft, which pivotally supports the trigger lever so as to be rotatable, with left and right inner wall surfaces. The storage recess comprises an operation side opening part opening an operation range where the trigger lever rotates, and a back side opening part opening from a top face of the storage recess to a position beyond at least the support shaft of the trigger lever on a back side of the operation part 32.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a remote controller having a trigger mechanism, and more particularly to a remote controller suitable for a work machine-mounted crane.

  As this type of remote controller, for example, a technique described in Patent Document 1 is disclosed. The remote controller described in this document is used for a vehicle-mounted crane (hereinafter also simply referred to as “crane”) mounted on a vehicle as a work machine. A receiver is provided on the crane side, and the receiver performs data transmission necessary for crane operations with the remote controller.

  The remote controller described in Patent Document 1 rotatably supports a gripping unit, an operation unit provided at an upper position of the gripping unit, and a trigger lever for speed adjustment provided on a lower surface side of the operation unit. And a trigger support portion. The trigger lever is pivotally supported by the receiving recess provided in the trigger support part and the distal end protrudes to the outside of the operation part. The operator operates the protruding part of the trigger lever with a finger to operate the crane. The speed is adjusted. A potentiometer is supported on the trigger, and the potentiometer is activated in accordance with the operation of the trigger. Since a general potentiometer does not automatically return to the operation start point position after the operation is completed, it is necessary to separately return to the operation start point position using a biasing force of a spring or the like.

JP 2000-44167 A Japanese Examined Patent Publication No. 6-66168

However, since the remote control device described in Patent Document 1 operates to pull the trigger lever toward the front like a pistol trigger, the opening of the trigger lever is long open to the front and back, blocking dust and the like. Since it is difficult to provide a cover, water and dust are likely to enter from the housing recess. Therefore, there is a problem that the potentiometer and the spring are easily affected by water and dust. In particular, if the working machine is a ship, when using a remote controller with a working machine-mounted crane for a ship, a countermeasure for draining seawater to prevent salt damage of the trigger mechanism is extremely important.
A general potentiometer is, for example, a potentiometer described in Patent Document 2, even if the device itself is waterproof, but when individual components such as springs and trigger lever spindles are affected by salt damage, The controller will cause malfunction.

  Therefore, the present invention has been made paying attention to such problems, and provides a remote controller having a trigger mechanism that is not easily affected by water and dust, and a work machine-equipped crane including the same. Is an issue.

  In order to solve the above problems, a remote controller according to an aspect of the present invention is a remote controller that performs necessary data transmission with a receiver on a work machine side, and includes a gripping unit and the gripping unit An operation part provided with a plurality of operation switches in front of itself, and a trigger lever for adjusting the speed of the operation part provided on the lower surface side of the operation part from the state of gripping the grip part A trigger support portion that can be operated so as to be rotatable, and the trigger support portion includes an accommodation recess having a hole through which a support shaft pivotally supporting the trigger lever penetrates right and left inner wall surfaces. The recess has an operation side opening that is open in an operation range in which the trigger lever rotates, and a position on the back side of the operation portion that is at least beyond the support shaft of the trigger lever from the upper surface of the housing recess. Up to the open back side opening Characterized in that it has.

  According to the remote controller according to one aspect of the present invention, the housing recess that houses the trigger lever includes an operation side opening that is open in an operation range in which the trigger lever rotates, and a back side of the operation unit. Since it has a back side opening that is open at least from the upper surface of the housing recess to a position beyond the support shaft of the trigger lever, the remote controller is stored in an inverted state on a table or the like. Even when water or dust once enters the recess, it is easy to discharge the water or dust to the outside of the receiving recess from the back side opening that is open toward the back side. Therefore, it can be set as the trigger mechanism which is hard to receive the bad influence of water and dust.

  Here, when the remote controller according to one aspect of the present invention is placed on a horizontal plane so that the operation-side opening faces upward, the ceiling surface of the housing recess is connected to the back-side opening. It is preferable that it is formed by a surface having a downward slope.

  In such a configuration, the remote controller is not used in the case where the upper surface of the remote controller has a mounting surface formed by a plane on which the remote controller can be mounted on the mounting target. Sometimes, when a remote controller is placed on a placement object such as a table, the placement surface is formed so that the remote controller can be placed on the placement object. It can be placed stably. Then, in a posture in which the remote controller is inverted and placed on the placement target, the ceiling surface of the housing recess is formed by a surface that has a downward slope that leads to the back side opening that is open toward the back side. Therefore, even if water or sand dust enters the housing recess of the remote controller, it is easily discharged out of the housing recess while the remote controller is placed on the placement target. Therefore, it is more suitable when it is set as the trigger mechanism which is hard to receive the bad influence of water and dust. However, this is not the case when the ceiling surface of the housing recess has an upward slope with respect to the horizontal plane depending on the state of the placement target surface.

  In the remote controller according to one aspect of the present invention, it is preferable that the trigger support portion has a unit structure in which the trigger lever and a housing recess for housing the trigger lever can be integrally attached to and detached from the operation portion. . With such a configuration, the trigger support portion can be integrally attached to and detached from the trigger lever with respect to the operation portion and the accommodating recess for accommodating the same, so that the maintenance of the trigger mechanism is easy. Therefore, it is more suitable for preventing or suppressing the performance degradation of the trigger mechanism even in a bad environment with a lot of water and dust.

  Further, in the remote controller according to one aspect of the present invention, the trigger support portion includes a support housing formed from the housing recess and a sealed chamber provided on the left and right of the housing recess in the center thereof, The sealed chamber is configured such that both ends of the support shaft in the axial direction are opened, and the openings are in close contact with each other by two closing lids so that each of them is closed. It is preferable that a potentiometer for detecting the amount of rotation of the trigger lever is incorporated, and a spring for biasing the trigger lever to an initial position is incorporated in the other of the left and right sealed spaces. Such a configuration is suitable as a structure that reliably waterproofs mechanical parts other than the trigger lever when the trigger support portion has a unit structure.

  In order to solve the above-described problem, a work machine-mounted crane according to an aspect of the present invention includes a receiver installed on the work machine side and a remote operation for performing necessary data transmission between the receiver and the receiver. A work machine-mounted crane mounted on the work machine, wherein the remote control device includes the remote control device according to one aspect of the present invention. According to the work machine-equipped crane according to one aspect of the present invention, since the remote control device according to one aspect of the present invention is provided, the trigger mechanism that is not easily affected by water or dust prevents the trigger mechanism from degrading or Suppressing and stable crane operation is possible.

  As described above, according to the present invention, it is possible to provide a remote controller having a trigger mechanism that is not easily affected by water and dust, and a work machine-equipped crane including the remote controller.

It is a block diagram explaining the vehicle mounted crane which is one Embodiment of the working machine mounted crane which concerns on this invention. It is a perspective view explaining one Embodiment of the remote controller based on this invention used for operation of the vehicle-mounted crane of FIG. FIG. 3 is a side view of the remote controller of FIG. 2, in which the trigger support portion is shown broken away. It is ZZ sectional drawing of FIG. It is a figure which shows the part of the trigger support part of FIG. It is a side view of an example of the remote controller shown as a comparative example, In the same figure, the trigger support part is broken and shown. It is a principal part enlarged view of FIG. It is YY sectional drawing of FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate. The drawings are schematic. For this reason, it should be noted that the relationship between the thickness and the planar dimension, the ratio, and the like are different from the actual ones, and the dimensional relationship and the ratio are different between the drawings. Further, the following embodiments exemplify apparatuses and methods for embodying the technical idea of the present invention, and the technical idea of the present invention is the material, shape, structure, and arrangement of components. Etc. are not specified in the following embodiments.

The working machine mounted crane of the present embodiment is a vehicle mounted crane mounted on a chassis frame between a cab and a loading platform of a vehicle such as a truck.
As shown in FIG. 1, this vehicle-mounted crane (hereinafter also simply referred to as “crane”) 1 is provided on a base 4 equipped with an outrigger 2 and a main body 3 at the center of the base 4 so as to be turnable. A column 6 and a boom 7 pivotally supported by the upper end of the column 6 so as to be raised and lowered are provided. The column 6 is provided with a winch 11 around which the wire rope 12 is wound.

  The crane 1 includes a swing hydraulic motor 5, a boom telescopic hydraulic cylinder 8, as a plurality of actuators for rotating the column 6, raising and lowering and extending and retracting the boom 7, and winding and unwinding the winch 11. A boom hoisting hydraulic cylinder 9 and a winch hydraulic motor 10 are provided. On the lower surface of the boom 7, the wire rope 12 is guided from the winch 11 to the tip 7 s of the boom 7, and is hooked on the hook 13 for hanging load via a pulley (not shown) of the tip 7 s. Is suspended from the tip 7 s of the boom 7.

  In addition, the crane 1 is provided with a main body control unit 20 having a receiver 21 in the main body unit 3 on the base 4, and a specific low power type by the main body control unit 20 and the remote controller 30 shown in FIG. 2. The radio control device is configured. The remote controller 30 can exchange data necessary for crane work with the receiver 21 of the main body control unit 20 by wireless communication.

Hereinafter, the remote controller 30 will be described in detail.
As shown in the perspective view of FIG. 2, the remote controller 30 includes a substantially cylindrical grip portion 31, a substantially box-shaped operation portion 32 provided at an upper position in the axial direction of the grip portion 31, an arm guard 36, and the like. Is provided. As shown also in FIG. 3, the arm guard 36 is provided to be separated from the grip portion 31 substantially in parallel so as to connect the lower end of the grip portion 31 on the back side and the center of the back surface of the operation portion 32. An operation panel 33 is provided in front of the operation unit 32.

  The operation panel 33 is provided with a plurality of operation switches 41 to 47 necessary for crane operation. In the present embodiment, the operation panel 33 is provided with a plurality of selection switches 41 and 42 respectively corresponding to the basic operation of the crane 1 as a plurality of operation switches, and above the selection switches 41 and 42 during normal operation. A plurality of setting switches 43 to 47 for performing various states of the crane and setting processing are provided.

  The plurality of selection switches 41 and 42 are, for example, momentary switches that self-return. Each selection switch 41, 42 can be tilted from the neutral position to the entire circumference in the radial direction, and when the selection switch 41, 42 is tilted, a corresponding operation signal is output. When the tilting operation force to each of the selection switches 41 and 42 is released, the operation returns to the neutral position and the output of the operation signal is stopped.

Here, as the basic operation of the crane 1, there are each operation of boom expansion / contraction, boom hoisting, boom turning and winch winding. In this embodiment, in order to operate each actuator of the crane 1, A raising / lowering selection switch 41 for turning and raising / lowering the boom 7 and an expansion / contraction / winding selection switch 42 for extending / retracting the boom 7 and hoisting / lowering the hook 13 are provided at the left and right of the center of the operation panel 33. Has been placed.
In this example, the tilting of the undulation / swing selection switch 41 to the left and right corresponds to the left and right pivoting of the boom 7, and the tilting to the up and down corresponds to the undulation of the boom 7. Further, the tilting of the expansion / contraction / winding selection switch 42 to the left and right corresponds to the expansion and contraction of the boom 7, and the tilting to the vertical corresponds to the hoisting and lowering of the hook 13.

  Further, as shown in FIG. 3, on the lower surface side of the operation portion 32, a speed adjustment trigger lever 60 for controlling the operation speed of the crane 1 can be rotated around the support shaft 61 in the vicinity of the upper portion of the grip portion 31. A trigger support portion 50 is provided for supporting. The remote controller 30 of the present embodiment has a unit structure in which a trigger support portion 50 that rotatably supports a trigger lever 60 is detachable from the operation portion 32. As shown in FIG. The outer shape is formed in a rectangular shape.

The box-type operation unit 32 includes a control unit (not shown), a transmission / reception unit, and a battery as a power source. The control unit computes an operation signal that is an execution command for operating each actuator of the crane 1 in accordance with the operation of each of the selection switches 41 and 42, each of the setting switches 43 to 47, and the trigger lever 60. The operation signal from the unit can be transmitted to the receiver 21 on the crane 1 side.
An upper surface cover 34 is detachably mounted on the upper surface of the operation unit 32 with a plurality of fixing screws. By removing the upper surface cover 34, maintenance of the control unit, transmission / reception unit, and power supply in the operation unit 32 is possible. It has become.

Hereinafter, the trigger support portion 50 constituting the trigger mechanism will be described in more detail.
As shown in the ZZ cross section of FIG. 3 in FIG. 4, the trigger support portion 50 includes a box-shaped support housing 56 that opens to the left and right, and a closing lid that closes the left and right openings of the support housing 56. 55 and 57. The support housing 56 is formed with a housing recess 51 that opens to the lower surface side at the center in the width direction. A first sealed chamber 52 and a second sealed chamber 53 are defined on the left and right sides of the housing recess 51, respectively. Has been.

  In other words, the trigger support portion 50 is provided with an accommodation recess 51 for accommodating the trigger lever 60 between the first sealed chamber 52 and the second sealed chamber 53. The accommodating recess 51 accommodates from the proximal end portion of the trigger lever 60 to the middle portion thereof. Both ends of a support shaft 61 that pivotally supports the trigger lever 60 pass through the left and right inner wall surfaces of the housing recess 51. In the present embodiment, the right housing part of the support housing 56 is the first sealed chamber 52, but the arrangement of the first sealed chamber 52 and the second sealed chamber 53 may be reversed. Good.

  The trigger lever 60 is a trigger-type switch capable of proportional control. As shown in FIG. 4, a potentiometer 62 whose voltage changes according to the turning operation of the trigger lever 60 is provided coaxially with the support shaft 61. Yes. When the operator changes the pulling amount of the trigger lever 60, a proportional signal corresponding to the pulling amount of the trigger lever 60 is output from the potentiometer 62 to the control unit of the operation unit 32, and the control unit operates the operation speed of each actuator of the crane 1. Is to decide.

  The lower portion of the trigger lever 60 protrudes downward from the opening of the housing recess 51 so that the operator can operate with an index finger. As shown in FIG. 5, the accommodation recess 51 accommodates the operation side opening As that opens the operation range (reference numeral β in FIG. 5) in which the trigger lever 60 rotates and the back side of the operation unit 32. A back side opening Ah that is open from the ceiling surface 51d of the recess 51 to a position that exceeds at least the center O of the support shaft 61 of the trigger lever 60 is provided. In particular, if the back side opening Ah provided so as to be connected to the operation side opening As is formed in the housing recess 51, the opening area is further increased, and the effect of improving the discharge of foreign matters such as water and dust is enhanced. .

More specifically, as shown in FIG. 4, the support housing 56 is open on the left and right side surfaces of the first sealed chamber 52 and the second sealed chamber 53, and the left and right openings are detachable closing lids 55. , 57 are respectively closed. The support housing 56 and the closing lids 55 and 57 are provided with O-ring mounting portions 52c, 55c, 53c, and 57c that project in an annular shape toward the inner side in the radial direction on the opposing surfaces.
The O-ring mounting portions 53 c and 57 c of the support housing 56 and the closing lid 57 are provided with an O-ring 66 between the mounting portions, and the O-ring mounting portion 52 c of the support housing 56 and the closing lid 55. 55c, an O-ring 67 is interposed between the mounting portions, and the space between the support housing 56 and the closing lids 55 and 57 is securely sealed. A support shaft 61 is inserted along the width direction of the trigger support portion 50, and the trigger lever 60 is supported by the support shaft 61 so as to be rotatable in the housing recess 51. The support shaft 61 rotates integrally with the trigger lever 60.

  Both ends of the support shaft 61 protrude into the first sealed chamber 52 and the second sealed chamber 53, respectively. Between the support shaft 61 and the inner wall surfaces on both sides of the housing recess 51, shafts are sealed by packings 68 and 69 mounted in mounting grooves on the inner peripheral side of the bosses 52b and 35b of the support housing 56, respectively. Infiltration of water and dust into the first sealed chamber 52 and the second sealed chamber 53 from the side is prevented. Further, both shaft ends of the support shaft 61 are rotatably supported by two bearings 63 and 64 in order to prevent the trigger lever 60 from moving smoothly and swinging the support shaft 61. In the example of the present embodiment, both shaft ends of the support shaft 61 are supported by the bearing 63 provided on the boss 52 b of the support housing 56 on the first sealed chamber 52 side, and the closed lid 57 is disposed on the second sealed chamber 53 side. Is supported by a bearing 64 provided on the boss 57b.

  The potentiometer 62 is built in the first sealed chamber 52. The potentiometer 62 is provided coaxially with the support shaft 61 at a position closer to the shaft end than the bearing 63. A wiring (not shown) is led out from the potentiometer 62, and the wiring is detachably connected to a relay board (not shown) of the control unit in the operation unit 32. In the second sealed chamber 53, a torsion coil spring 65, which is an urging spring, is coaxially built around the support shaft 61 so as to surround the support shaft 61, so that the torsion coil spring 65 is not exposed to the external environment. Sealed. The torsion coil spring 65 always urges the trigger lever 60 in the counterclockwise direction RW in FIG. 5 and automatically returns to the operation start position when not operated.

  As shown in FIG. 5, a concave portion 50c is formed on the front wall of the accommodating concave portion 51 at a position facing the locking convex portion 60t formed on the circular outer peripheral surface of the base end portion of the trigger lever 60. The stepped portion is a locking recess 50d that engages with the locking projection 60t. The locking recess 50d functions as a detent for the trigger lever 60, and the locking recess 50d and the locking projection 60t of the trigger lever 60 come into contact with each other so that the trigger lever 60 is not operated by the operator. Hold the posture.

On the upper surface of the trigger support portion 50, two female screws (not shown) for fixing the trigger support portion 50 are provided at the positions of the first sealed chamber 52 and the second sealed chamber 53 (four locations in total). Yes. The operation portion 32 is provided with a mounting portion 37 formed in an L shape in a side view so that the trigger support portion 50 can be accommodated at a position on the back surface side and the bottom surface side. The mounting portion 37 is provided with four through holes for mounting at positions facing the respective four female threads of the trigger support portion 50 in total.
The trigger support portion 50 has a shape in which two surfaces 50a and 50b are aligned with two L-shaped opposing surfaces of the mounting portion 37 among the above-described rectangular surfaces in a side view, and the mounting portion from the back side. 37 is unitized so that it can be inserted. With this unit structure, the trigger support portion 50 is accommodated on the back surface of the operation portion 32 so as to be inserted into the mounting portion 37 from below the operation portion 32, and the upper surface 50 a is moved to the operation portion 32 by the four fastening screws 70. It is detachably fixed from the inner side.

  Here, as shown in FIG. 2 and FIG. 3, the remote controller 30 is placed on the upper surface of the remote controller 30 with a flat surface on which the remote controller 30 can be placed on the placement target. A surface 35 is provided on the top cover 34. The axis of the grip portion 31 is orthogonal to the surface of the placement surface 35. Thereby, when the remote controller 30 is not used, when the remote controller 30 is placed on a placement object such as a table, the placement surface 35 can place the remote controller 30 on the placement object. Since it is formed, the remote controller 30 can be stably placed upside down.

When the trigger support unit 50 is placed on the placement target with the placement surface 35 abutting on the placement target with the remote controller 30 shown in FIG. The surface 51d is formed by a surface having a downward slope that is connected to the rear-side opening Ah.
That is, when the mounting surface 35 is brought into contact with the horizontal plane HL shown in the figure, the position P of the ceiling surface 51d of the housing recess 51 intersects with the horizontal plane HL is located on the back side of the operation unit 32. 3, the angle α formed by the surface of the ceiling surface 51d and the horizontal plane HL is lowered from the back side of the operation unit 32 toward the position P where the horizontal plane HL intersects. As a result, when the remote controller 30 is placed upside down, the ceiling surface 51d of the housing recess 51 has a downward slope that leads to the back side opening Ah.

Next, operation of the crane 1 using the remote controller 30 described above will be described.
The operator moves away from the crane 1 and operates the remote controller 30. At the time of crane work, the operator holds the remote controller 30 in his / her hand, appropriately operates the operation switches 41 to 47 on the operation panel 33 corresponding to the desired setting and operation of the crane 1 and operates the trigger lever 60. In the crane work performed by the remote controller 30, first, the operation direction is selected using the selection switches 41 and 42 corresponding to the actuator to be operated. Then, fine adjustment of the operation speed is performed by the trigger lever 60.

  A predetermined operation signal serving as an execution command for operating each actuator of the crane 1 is transmitted from the remote controller 30 to the receiver 21 of the main body control unit 20 by the operation of the selection switches 41 and 42 and the rotation operation of the trigger lever 60 by the operator. Sent. Further, the main body control unit 20 transmits data necessary for crane work from the transmission / reception unit of the receiver 21 to the remote controller 30. Thereby, based on the data required for crane work between the main body controller 20 and the remote controller 30, the main body controller 20 is based on the control signal in which the operation signal from the remote controller 30 is processed, and the above-mentioned. The control valve of each actuator is controlled, and the desired actuator of the crane 1 is operated. In this way, the operator can perform a desired crane operation.

Next, operations and effects of the remote controller 30 will be described.
The remote controller 30 of the present embodiment makes it possible to waterproof the trigger mechanism as a whole and facilitate the discharge of foreign matter from the housing recess 51 when foreign matter such as water or dust enters the vicinity of the housing recess 51 of the trigger lever 60. The trigger support part 50 is comprised as the objective, and is a trigger mechanism which is hard to be influenced by water and dust. In particular, the advantage of the trigger mechanism of the remote controller 30 is that the receiving recess 51 of the trigger support portion 50 has an open structure toward the lower side and the back side.

Here, in order to clarify the operation and effect of the remote controller 30 of the present embodiment, first, a remote controller of a comparative example will be briefly described with reference to FIGS.
A remote controller 130 shown as a comparative example in FIG. 6 includes a gripper 131, an operation unit 132 provided at an upper position of the gripper 131, and a trigger lever 160 for speed adjustment provided on the lower surface side of the operation unit 132. And a trigger support portion 150 that rotatably supports the crane, and the operation speed of the crane is adjusted by a trigger lever 160 protruding outside the operation portion 132.

  As shown in FIGS. 7 and 8, the trigger support portion 150 accommodates from the base end portion to the middle portion of the trigger lever 160 and supports the trigger lever 160 so as to be rotatable. A housing recess 151 is provided to support both ends of 161 with left and right inner wall surfaces. Below the housing recess 151 is an operation side opening As in which an operation range β in which the trigger lever 160 rotates is opened downward.

  As shown in FIG. 8, the trigger support portion 150 of the comparative example includes an equipment chamber 152 in the operation portion 132 on one shaft end side of the support shaft 161 of the trigger lever 160. In the device room 152, a potentiometer 162 for detecting the rotational position is accommodated. The equipment room 152 in which the potentiometer 162 is housed can be waterproof and dustproof by being incorporated and sealed in the operation unit 132.

  However, the remote controller 130 shown in the comparative example has a structure that waterproofs and dust-proofs only the device room 152 in which the potentiometer 162 is housed, and as illustrated in FIG. 8, the trigger lever 160 that constitutes the trigger mechanism is supported. Since the housing recess 151 is provided with a shaft support 164 at the tip of the shaft 161, a spring 165 for urging the trigger lever 160 toward the operation start point side, there is a mechanism portion that is not sealed.

  Further, in the remote controller 130 of the comparative example, the trigger support portion 150 has an integral structure that constitutes a part of the outer wall surface of the operation portion 132. There is a risk of entering the inside of the portion 132. In addition, since the operation side opening As formed by the outer frame 154 of the housing recess 151 of the trigger lever 160 has a bottomed hole shape that opens only downward, such a bottomed hole shaped operation side opening. In the case of As, when the remote controller 130 is placed upside down on a mounting target such as a table, when water or sand dust once enters the receiving recess 151, the water or sand that has entered enters the receiving recess 151. It is difficult to discharge to the outside. Therefore, when this remote controller 130 is used in a bad environment with a lot of water, dust, etc., there is a problem that the operability of the trigger lever 160 is lowered due to the performance degradation of the mechanical parts such as the bearing 164 and the spring 165 of the trigger mechanism. is there.

  On the other hand, in the remote controller 30 of the present embodiment, the housing recess 51 that houses the trigger lever 60 is at least the trigger lever 60 from the ceiling surface 51d of the housing recess in a range that faces the back side of the operation unit 32. Since the back side opening Ah that has been opened up to the position beyond the support shaft 61 is provided together with the operation side opening As, even if water or dust has once entered the receiving recess 51, the water or dust Can be easily discharged to the outside of the housing recess 51 from the back side opening Ah opened toward the back side. Therefore, it can be set as the trigger mechanism which is hard to receive the bad influence of water and dust. In particular, if the back-side opening Ah provided so as to be connected to the operation-side opening As is formed in the housing recess 51, the opening area is further increased, and the effect of improving the discharge of foreign matters such as water and dust is increased. be able to.

  Further, according to the remote controller 30 of the present embodiment, when the remote controller 30 is placed on a mounting target such as a stand when the remote controller 30 is not used, the mounting surface 35 is the remote controller 30. Since 30 is formed in a plane that can be placed on the placement target, the remote control unit 30 can be stably placed on the placement target in an inverted posture when the remote control unit 30 is not used. Can do.

  And the ceiling surface 51d of the accommodation recessed part 51 is the surface used as the downward slope connected to the back side opening part Ah open | released toward the back side, when the said remote control device 30 is mounted on the mounting object. Since it is formed, even if water or dust enters the receiving recess 51 of the remote controller 30, while the remote controller 30 is placed on the placement target, foreign matter such as water or dust is removed from the back surface. It can be easily discharged from the side opening Ah. For this reason, even in an adverse environment with a lot of water, dust, etc., water and dust are easily discharged from the housing recess 51, which is more suitable for a trigger mechanism that is less susceptible to the adverse effects of water and dust.

  Furthermore, according to the remote controller 30 of the present embodiment, the trigger support unit 50 is a plug-in unit structure in which the trigger lever 60 and the housing recess 51 for housing the trigger lever 60 can be integrally attached and detached from the outside of the lower surface of the operation unit 32. Therefore, the trigger lever 60 and the housing recess 51 for housing the trigger lever 60 can be integrally attached to and detached from the operation unit 32. Therefore, maintenance of the trigger mechanism is easy, and it is preferable to make a structure in which foreign matters such as water and dust do not easily enter the operation portion 32 from the housing recess 51. Therefore, it is more suitable for preventing or suppressing the performance degradation of the trigger mechanism even in a bad environment with a lot of water and dust.

  In addition, according to the remote controller 30 of the present embodiment, the trigger support portion 50 includes a support housing 56 having openings on both sides thereof and having an accommodating recess 51 at the center thereof, and both sides of the support housing 56. Since each of the openings is configured to have two closed lids 55 and 57 that define a sealed space on the left and right sides of the receiving recess 51, the sealed space is configured so as not to be exposed to the external environment. It is suitable for constructing a waterproof structure for the trigger mechanism.

In the trigger support portion 50, one of the left and right sealed spaces is a first sealed chamber 52. The first sealed chamber 52 has a built-in potentiometer 62 that detects the amount of rotation of the trigger lever 60. The other sealed space is a second sealed chamber 53, and a torsion coil spring 65, which is a spring that regulates the initial position of the trigger lever 60, is built in the second sealed chamber 53. In the case of the trigger support portion 50 having the unit structure as described above, it is suitable as a structure that reliably waterproofs mechanical parts other than the trigger lever 60.
In particular, compared to the comparative example described above, according to the remote controller 30 of the present embodiment, the torsion coil spring 65 is built in the second sealed chamber 53 that is sealed so as not to be exposed to the external environment. The torsion coil spring 65 can be protected from foreign matters such as water and dust.

  As described above, the trigger mechanism included in the remote controller 30 of the present embodiment is not easily affected by water or dust. If the vehicle-mounted crane 1 equipped with the remote controller 30 is used, The trigger mechanism which is not easily affected can prevent or suppress the performance degradation of the trigger mechanism and can perform stable crane operation. Note that the remote controller according to the present invention and the work machine-equipped crane including the remote controller are not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the work equipment-mounted crane has been described as an example of a vehicle-mounted crane mounted on a chassis frame between a driver's cab and a loading platform of a vehicle such as a truck. If it is a crane mounted on a work machine, it can be applied to a ship-mounted crane mounted on a ship as a work machine.

Further, for example, in the above-described embodiment, the example is described in which the trigger support portion 50 is provided with the second hermetic chamber 53 that accommodates the torsion coil spring 65. Instead of providing the two sealed chambers 53, the torsion coil spring 65 may be disposed inside the housing recess 51 as in the comparative example.
Even if it is such a structure, if the back side opening part Ah provided in the accommodation recessed part 51 so that it may connect with the operation side opening part As is formed, there exists an effect which improves the discharge | emission property of foreign materials, such as water and dust. Further, in addition to the rear side opening Ah, it is more preferable to provide a descending surface on the ceiling surface 51d of the accommodating recess 51 of the trigger lever 60 in order to improve the effect of discharging foreign matters such as water and dust. is there.

  However, when the torsion coil spring 65 is disposed in the housing recess 51 without sealing the torsion coil spring 65, water or dust enters the inside of the torsion coil spring 65, or water or dirt is inserted between the lines of the torsion coil spring 65. When the dust adheres, the torsion coil spring 65 becomes an obstacle, and there is a possibility that water is difficult to be discharged out of the housing recess 51. Therefore, it is desirable to provide the second sealed chamber 53 for housing the torsion coil spring 65 to seal the torsion coil spring 65 so as to facilitate the discharge of water from the housing recess 51 as in the above embodiment.

  For example, when the trigger lever 60 is actuated, the trigger lever 60 is urged counterclockwise RW by the torsion coil spring 65 so as to return to the actuation start point position. The torsion coil spring 65 has one end fixed to the trigger support portion 50 and the other end fixed to the support shaft 61. At the time of operation, friction is generated at the fixed portion by the biasing force, and wear powder is generated. When the electronic component such as the potentiometer 62 and the torsion coil spring 65 are in the same space, scattered wear powder may enter between the electronic components and cause a contact failure. Therefore, it is better to fix the torsion coil spring 65 in a sealed space isolated from the electronic component.

  Further, for example, in the above-described embodiment, the trigger support unit 50 is described as an example of a unit structure in which the trigger lever 60 and the housing recess 51 that houses the trigger lever 60 are integrally removable from the operation unit 32. However, the present invention is not limited thereto. For example, as shown in the comparative example, part or all of the frame of the trigger support portion 50 may be formed integrally with the housing structure of the operation portion 32. However, in order to facilitate the maintenance of the trigger mechanism and prevent or suppress the performance degradation of the trigger mechanism even in a bad environment with a lot of water, dust, etc., the trigger support 50 is attached and detached as in the above embodiment. A possible unit structure is desirable.

1 Vehicle-mounted crane (work machine-mounted crane)
DESCRIPTION OF SYMBOLS 2 Outrigger 3 Main-body part 4 Base 5 Turning hydraulic motor 6 Column 7 Boom 8 Boom expansion-contraction hydraulic cylinder 9 Boom raising / lowering hydraulic cylinder 10 Winch hydraulic motor 11 Winch 12 Wire rope 13 Hook 20 Main body control part 21 Receiver 30 Remote operation Device 31 Grip part 32 Operation part 33 Operation panel 34 Top cover 35 Placement surface 36 Arm guard 37 (Trigger support part) mounting part 41, 42 Selection switch (operation switch)
43 to 47 Setting switch (operation switch)
50 Trigger support (trigger mechanism)
51 Housing recess 52 First sealed chamber 53 Second sealed chamber 55 Closure lid (on the first sealed chamber side) 56 Support housing 57 Closure lid (on the second sealed chamber side) 60 Trigger lever 61 Support shaft 62 Potentiometers 63, 64 Bearing 65 Torsion coil spring (spring)
66, 67 O-ring 68, 69 Packing As Operation side opening Ah Back side opening

Claims (5)

A remote controller that performs necessary data transmission with a receiver on the work machine side,
From the gripping part, the operating part provided at the upper position of the gripping part and having a plurality of operation switches arranged in front of the gripping part, and provided on the lower surface side of the operating part and gripping the gripping part, It has a trigger support portion that can rotate the trigger lever for speed adjustment,
The trigger support portion has an accommodation recess having a hole through which a support shaft pivotally supporting the trigger lever penetrates right and left inner wall surfaces;
The accommodating recess has an operation side opening that is open in an operation range in which the trigger lever rotates,
On the back side of the operation part, the remote control device has a back side opening part opened from the upper surface of the housing recess to at least a position beyond the support shaft of the trigger lever.   When the remote controller is placed on a horizontal surface so that the operation side opening is directed upward, the ceiling surface of the housing recess is formed by a surface having a downward slope connected to the back side opening. The remote controller according to claim 1.   3. The remote controller according to claim 1, wherein the trigger support part has a unit structure in which the trigger lever and a housing recess for housing the trigger lever can be integrally attached to and detached from the operation part. The trigger support portion has the receiving recess at its center,
Having a support housing formed from sealed chambers provided on the left and right of the housing recess;
The sealed chamber is configured such that both ends in the axial direction of the supporting shaft of the self-sealing shaft are opened, and the openings are in close contact with each other by two closing lids so as to close each other.
A potentiometer for detecting the amount of rotation of the trigger lever is built in one of the left and right sealed spaces, and a spring for biasing the trigger lever to an initial position is built in the other of the left and right sealed spaces. 3. The remote control device according to 3. A work machine-mounted crane equipped with a receiver installed on the work machine side, and a remote controller that performs necessary data transmission between the receivers, and mounted on the work machine,
A working machine-mounted crane comprising the remote controller according to any one of claims 1 to 4 as the remote controller.

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