JP6539535B2 - REMOTE CONTROLLER AND WORKING UNIT MOUNTED CRANE PROVIDED WITH THE SAME - Google Patents

Description

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

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

  The remote controller described in Patent Document 1 rotatably supports a trigger lever for speed adjustment, which is provided on a grip portion, an operation portion provided at an upper position of the grip portion, and a lower surface side of the operation portion. And a trigger support. The trigger lever has its proximal end pivotally supported by the accommodation recess provided in the trigger support and its distal end protrudes outside the operation portion, and the operator operates the protruding portion of the trigger lever with a finger to operate the crane It is supposed to adjust the speed. A potentiometer is supported on the trigger, and the potentiometer operates with the operation of the trigger. Since a general potentiometer does not automatically return to the operation start position after the end of operation, it is necessary to return to the operation start position separately using a biasing force of a spring or the like.

Japanese Patent Laid-Open No. 2000-44167 Japanese Examined Patent Publication 6-66168

However, in the remote controller described in Patent Document 1, since the trigger lever is operated so as to pull the trigger lever to the front like a pistol trigger, the opening port of the trigger lever is opened long in the front and back, thereby blocking dust etc. Since the cover is difficult to provide, water and dust can easily infiltrate from the accommodation recess. Therefore, there is a problem that the potentiometer and the spring are easily affected by water and dust. In particular, when the work machine is a ship, in the case of using a remote control with a work machine mounted crane for a ship, it is extremely important to take out measures to prevent seawater damage to the trigger mechanism.
A common potentiometer is, for example, a potentiometer described in Patent Document 2. Even if the device itself is waterproofed, salt damage to individual components such as a spring or a pivot of a trigger lever may cause a remote operation. The operating device may cause malfunction.

  Then, this invention was made | formed paying attention to such a problem, Comprising: The remote control which has a trigger mechanism which is hard to receive to the influence of water and dust, and a working machine loading type crane provided with this are provided. As an issue.

  In order to solve the above-mentioned subject, a remote control concerning one mode of the present invention is a remote control which performs necessary data transmission between a receiver by the side of a work machine, and it has a holding part, and the holding part A control lever provided at an upper position of the control unit and having a plurality of control switches disposed in front of the control unit, and a trigger lever provided on the lower surface side of the control unit and holding the grip; A trigger support portion capable of rotatably operating the trigger support portion, the trigger support portion having a receiving recess having a hole through which the support shaft pivotally supporting the trigger lever penetrates the left and right inner wall surfaces; The recess is a position at least beyond the support shaft of the trigger lever from the upper surface of the accommodation recess on the operation side opening that is opened in the operation range where the trigger lever pivots and on the back side of the operation unit Up to the open back side opening and Characterized in that it has.

  According to the remote controller according to one aspect of the present invention, the receiving recess for receiving the trigger lever is provided at the operation-side opening that is open within the operating range where the trigger lever pivots, and at the back side of the operating portion. The rear opening is open from the upper surface of the housing recess to at least the position beyond the support shaft of the trigger lever, so that the remote controller is placed upside down on a table or the like and housed Even when water or sand dust intrudes into the recess, it is easy to discharge the water or sand dust from the back side opening opened toward the back side to the outside of the accommodation recess. Therefore, it can be set as the trigger mechanism which is hard to receive the bad influence of water and dust.

  Here, in the remote controller according to one aspect of the present invention, when the operation-side opening is placed on a horizontal surface with the opening facing upward, the ceiling surface of the accommodation recess is connected to the back-side opening It is preferable that the surface be formed by a downward slope.

  With such a configuration, when the upper surface of the remote controller has a mounting surface formed of a flat surface on which the remote controller can be placed and placed, the remote controller is not used. Sometimes, when the remote controller is placed on the mounting object such as a table, the mounting surface is formed to be able to place the remote controller on the mounting object, so the remote controller is turned upside down. It can be stably placed. Then, in the posture in which the remote controller is turned upside down and placed on the placement target, the ceiling surface of the housing recess is formed by a downward slope connecting to the back side opening opened toward the back side. Thus, even if water or dust enters the receiving recess of the remote controller, it is likely to be discharged out of the receiving recess while the remote controller is placed on the placement target. Therefore, it is more suitable for setting it as a trigger mechanism which is not easily affected by water and dust. However, this is not the case in the case where the ceiling surface of the housing recess is an upward slope with respect to the horizontal surface depending on the state of the mounting target surface.

  Further, 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 are integrally removable from the operation portion. . With such a configuration, maintenance of the trigger mechanism is easy because the trigger support portion is integrally removable from the operation portion from the trigger lever and the receiving recess for receiving the trigger lever. Therefore, it is more suitable for preventing or suppressing the performance deterioration of the trigger mechanism even in a bad environment with many water, dust and the like.

  Further, in the remote controller according to one aspect of the present invention, the trigger support portion has a support housing formed in the center thereof from the housing recess and a sealed chamber provided on the left and right of the housing recess. The closed chamber is open at both ends in the axial direction of the spindle itself, and the openings are in close contact with two closed lids so as to close each other, and one of the left and right closed spaces is Preferably, a potentiometer for detecting the amount of rotation of the trigger lever is incorporated, and a spring for urging 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 for reliably waterproofing mechanical parts other than the trigger lever when the trigger support portion has a unit structure.

  Further, in order to solve the above problems, a working machine mounted crane according to an aspect of the present invention is a remote control that performs necessary data transmission between a receiver equipped on the working machine side and the receiver. And a work implement mounted crane mounted on the work machine, wherein the remote control according to one aspect of the present invention is provided as the remote control. According to the work implement mounted crane according to the aspect of the present invention, since the remote controller according to the aspect of the present invention is provided, the performance of the trigger mechanism is prevented from being degraded by the trigger mechanism that is less susceptible to water and dust. It is possible to control the crane operation stably.

  As described above, according to the present invention, it is possible to provide a remote controller having a trigger mechanism that is less susceptible to water and dust, and a work implement mounted crane including the same.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram explaining the vehicle-mounted type | mold crane which is one Embodiment of the working machine mounted type | mold crane which concerns on this invention. It is a perspective view explaining one Embodiment of the remote control which concerns on this invention used for operation of the vehicle-mounted type | mold crane of FIG. It is a side view of the remote control of FIG. 2, and in the figure, the trigger support part is broken and shown. It is ZZ sectional drawing of FIG. FIG. 4 shows a portion of the trigger support of FIG. 3; It is a side view of an example of the remote control shown as a comparative example, and in the 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. The drawings are schematic. Therefore, it should be noted that the relationship between the thickness and the plane dimension, the ratio, etc. is different from the actual one, and some parts have different dimensional relationships and ratios among the drawings. In addition, the embodiments described below illustrate apparatuses and methods for embodying the technical idea of the present invention, and the technical idea of the present invention includes materials, shapes, structures, and arrangements of component parts. Etc. are not specified in the following embodiment.

The work implement mounted crane of the present embodiment is a vehicle mounted crane mounted on a chassis frame between a cab and a platform of a vehicle such as a truck.
As shown in FIG. 1, this on-vehicle crane (hereinafter, also simply referred to as “crane”) 1 is pivotably provided on a base 4 equipped with an outrigger 2 and a main body 3 in the center of the base 4. A column 6 and a boom 7 pivotally and telescopically supported at the upper end of the column 6 are provided. The column 6 is provided with a winch 11 for winding the wire rope 12.

  The crane 1 also includes a hydraulic motor 5 for turning and a hydraulic cylinder 8 for boom extension / contraction as a plurality of actuators for performing swinging of the column 6, ups and downs of the boom 7 and operation of winding up and down the winch 11. A boom relief hydraulic cylinder 9 and a winch hydraulic motor 10 are provided. The wire rope 12 is guided from the winch 11 to the tip 7s of the boom 7 on the lower surface of the boom 7, and is hooked around a hook 13 for suspension via a pulley (not shown) of the tip 7s. Are suspended from the tip 7s of the boom 7.

  Further, 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 the specific small power type is specified by the main body control unit 20 and the remote controller 30 shown in FIG. The wireless control device of The remote controller 30 can exchange data necessary for the crane operation 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 a perspective view in FIG. 2, the remote controller 30 has a substantially cylindrical grip portion 31, a substantially box-shaped operation portion 32 provided at an axially upper position of the grip portion 31, and an arm guard 36. Equipped with The arm guard 36 is separated substantially in parallel with the gripping portion 31 so as to connect the lower end on the back surface side of the gripping portion 31 and the center of the back surface of the operation portion 32, as also shown in FIG. An operation panel 33 is provided on the front of the operation unit 32.

  The operation panel 33 is provided with a plurality of operation switches 41 to 47 necessary for the 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 at the time of normal operation above the selection switches 41 and 42 A plurality of setting switches 43 to 47 are provided for performing various states of the crane and setting processing.

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

Here, as the above basic operation of the crane 1, there are operations of boom expansion and contraction, boom undulation, boom turning and winch winding, and in the present embodiment, in order to operate the actuators of the crane 1, right and left of the boom 7 On the left and right sides of the center of the operation panel 33, a relief / turn selection switch 41 for swinging and raising / lowering the boom 7, and a stretch / roll selection switch 42 for extending and retracting the boom 7 and hoisting the hook 13. It is arranged.
In this example, the inclination of the ups and downs / turn selection switch 41 to the left and right corresponds to the left and right rotation of the boom 7, and the up and down inclination corresponds to the ups and downs of the boom 7. Further, the inclination 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 inclination to the top and bottom corresponds to the winding and winding of the hook 13.

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

In the box-shaped operation unit 32, a control unit (not shown), a transmission / reception unit, and a battery as a power supply are embedded. The control unit performs arithmetic processing of an operation signal to be an execution command to operate each actuator of the crane 1 in accordance with the operation of the selection switches 41 and 42, 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.
The upper surface cover 34 is detachably mounted on the upper surface of the operation unit 32 by a plurality of fixing screws, and maintenance of the control unit, the transmission / reception unit, and the power supply in the operation unit 32 is possible by removing the upper surface cover 34. It has become.

Hereinafter, the above-mentioned trigger support part 50 which constitutes a trigger mechanism is explained in more detail.
The trigger support portion 50 has 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, as shown in FIG. 55 and 57. In the support housing 56, an accommodation recess 51 opened on the lower surface side is formed at a central position in the width direction, and the first closed chamber 52 and the second closed chamber 53 are respectively defined on the left and right of the accommodation recess 51. It is done.

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

  The trigger lever 60 is a trigger type switch capable of proportional control, and 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 There is. 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 operating speed of each actuator of the crane 1. Is supposed to decide.

  The lower portion of the trigger lever 60 projects downward from the opening of the housing recess 51 so that the operator can operate with the index finger. As shown in FIG. 5, the accommodation recess 51 accommodates the operation-side opening portion As in which the operation range (symbol β in FIG. 5) in which the trigger lever 60 is pivoted is opened and the back side of the operation portion 32. It has the back side opening part Ah opened from the ceiling surface 51d of the recessed part 51 to the position beyond the center O of the spindle 61 of the trigger lever 60 at least. In particular, if the back side opening Ah provided so as to be connected to the operation side opening As in the housing recess 51 is formed, the opening area is further increased, and the effect of improving the dischargeability of foreign matter such as water and dust becomes high. .

More specifically, as shown in FIG. 4, in the support housing 56, the left and right side surfaces of the first sealed chamber 52 and the second sealed chamber 53 are open, and the left and right openings are removable closing lids 55. , 57, respectively. The supporting housing 56 and the closing lids 55, 57 are provided with O-ring mounting portions 52c, 55c, 53c, 57c, respectively, which annularly project radially inward on opposing surfaces of each other.
An O-ring 66 is interposed between the supporting housing 56 and the O-ring mounting portions 53c and 57c of the closing lid 57, and an O-ring mounting portion 52c of the supporting housing 56 and the closing lid 55 is provided. , 55c, an O-ring 67 is interposed between the mounting portions to ensure a tight seal between the support housing 56 and the closure lids 55, 57. The support shaft 61 is inserted along the width direction of the trigger support portion 50, and the trigger lever 60 is rotatably supported in the housing recess 51 by the support shaft 61. The support shaft 61 rotates integrally with the trigger lever 60.

  Both ends of the support shaft 61 project into the first closed chamber 52 and the second closed chamber 53, respectively. The space between the support shaft 61 and the inner wall surfaces on both sides of the housing recess 51 is axially sealed by packings 68 and 69 mounted in the mounting grooves on the inner peripheral side of the bosses 52 b and 35 b of the support housing 56. Water and dust are prevented from entering the first closed chamber 52 and the second closed chamber 53 from the side. Further, both shaft ends of the support shaft 61 are rotatably supported by two bearings 63 and 64 in order to prevent the smooth movement of the trigger lever 60 and the swing of the support shaft 61. In the example of the present embodiment, both axial 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 closed chamber 52 side, and the second closed chamber 53 side is the closing lid 57 It is supported by a bearing 64 provided on the boss 57b of the

  The potentiometer 62 is incorporated in the first closed 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 wire (not shown) is derived from the potentiometer 62, and the wire is detachably connected to a relay board (not shown) of the control unit in the operation unit 32. In the second closed chamber 53, a torsion coil spring 65, which is a biasing spring, is incorporated coaxially with 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 processing. The trigger lever 60 is always urged in the counterclockwise direction RW in FIG. 5 by the torsion coil spring 65, and automatically returns to the operation start position when not operated.

  As shown in FIG. 5, on the front wall of the housing recess 51, a recess 50c is formed at a position opposite to the locking projection 60t formed on the circular outer peripheral surface of the base end of the trigger lever 60. The step part by this becomes the latching recessed part 50d engaged with the latching convex part 60t. The locking recess 50d functions as a rotation stop for the trigger lever 60, and the locking recess 50d and the locking projection 60t of the trigger lever 60 abut each other, and the trigger lever 60 is not operated by the operator. Holds the attitude of

Two female screws (not shown) for fixing the trigger support 50 are provided on the upper surface of the trigger support 50 at positions of the first sealed chamber 52 and the second sealed chamber 53 (totally four) There is. The operation unit 32 is provided with a mounting portion 37 formed in an L-shape in a side view so as to be able to accommodate the trigger support portion 50 at a position on the back surface side and the lower surface side. The mounting portion 37 is provided with four mounting through holes at positions facing the respective four female screws of the trigger support portion 50.
The trigger support portion 50 has a shape in which two surfaces 50a and 50b of the rectangular shapes in the side view described above are aligned with the two L-shaped opposing surfaces of the mounting portion 37, and the mounting portion is viewed from the back side The unit is pluggable into 37. 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 the operation portion 32 by the four tightening screws 70. It is detachably fixed from the inside of the

  Here, as shown in FIG. 2 and FIG. 3, the remote controller 30 is formed on a top surface of the remote controller 30 by a flat surface on which the remote controller 30 can be placed and placed. A face 35 is provided on the top cover 34. The axis of the grip 31 is orthogonal to the surface of the mounting surface 35. Thus, when the remote controller 30 is placed on the placement target such as a table when the remote controller 30 is not used, the placement surface 35 can place the remote controller 30 on the placement target. Since it is formed, the remote controller 30 can be inverted and stably mounted.

When the trigger support portion 50 turns the remote controller 30 shown in FIG. 3 upside down and abuts the placement surface 35 on the placement target and places it on the placement target, the ceiling of the accommodation recess 51 is The surface 51 d is formed by a downward slope connecting to the back 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 intersecting the horizontal plane HL is located on the back side of the operation unit 32, In a posture in which the top and bottom of 3 are reversed, the angle α that the surface of the ceiling surface 51d makes with the horizontal plane HL is provided to be 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 51 d of the housing recess 51 has a downward slope leading to the back side opening Ah.

Next, the operation of the crane 1 using the remote controller 30 described above will be described.
The operator operates the remote controller 30 apart from the crane 1. At the time of crane work, the operator holds the remote controller 30 in hand, operates the operation switches 41 to 47 on the operation panel 33 corresponding to the setting and operation of the desired crane 1, and operates the trigger lever 60. The crane operation performed by the remote controller 30 first selects the operation direction using the selection switches 41 and 42 corresponding to the actuators to be operated. Then, the trigger lever 60 finely adjusts the operating speed.

  A predetermined operation signal serving as an execution command to operate each actuator of the crane 1 by the operation of the selection switches 41 and 42 by the operator and the rotation operation of the trigger lever 60 is sent from the remote controller 30 to the receiver 21 of the main control unit 20. Will be sent. Further, data necessary for the crane operation is transmitted from the transmission / reception unit of the receiver 21 to the remote controller 30 from the main body control unit 20. Thus, based on the data necessary for the crane operation between the main control unit 20 and the remote controller 30, the main control unit 20 determines whether the operation signal from the remote controller 30 is processed based on the control signal described above. Control the control valve of each of the actuators to operate the desired actuator of the crane 1. In this way, the operator can perform the desired crane operation.

Next, the operation and effect of the remote controller 30 will be described.
The remote controller 30 according to the present embodiment makes the entire trigger mechanism waterproof and facilitates discharge of foreign matter from the accommodation recess 51 when foreign matter such as water or dust enters the vicinity of the accommodation recess 51 of the trigger lever 60. The trigger support part 50 is comprised as an objective, and it is a trigger mechanism which is hard to receive to the influence of water or dust. In particular, an advantage of the trigger mechanism of the remote controller 30 is that the housing recess 51 of the trigger support 50 is open toward the lower surface side and the rear surface side.

Here, in order to make the operation and effects of the remote controller 30 of the present embodiment clearer, first, the remote controller of the comparative example will be briefly described with reference to FIGS. 6 to 8.
The remote controller 130 shown as a comparative example in FIG. 6 includes a grip portion 131, an operation portion 132 provided at an upper position of the grip portion 131, and a trigger lever 160 provided on the lower surface side of the operation portion 132 for speed adjustment. And a trigger support portion 150 rotatably supporting the trigger portion 160, and a trigger lever 160 projecting to the outside of the operation portion 132 is adapted to adjust the operation speed of the crane.

  The trigger support portion 150 accommodates from the proximal end portion to the middle portion of the trigger lever 160 and supports the trigger lever 160 in a pivotally movable manner, as shown in FIG. 7 and FIG. It has the accommodation recessed part 151 which supports the both ends of 161 by the inner wall surface on either side. Below the accommodation recess 151 is an operation-side opening portion As in which an operation range β in which the trigger lever 160 pivots is opened downward.

  The trigger support portion 150 of the comparative example has an equipment chamber 152 in the operation portion 132 on one shaft end side of the support shaft 161 of the trigger lever 160, as shown in FIG. The instrument chamber 152 accommodates a potentiometer 162 for detecting a rotational position. The equipment room 152 in which the potentiometer 162 is accommodated is incorporated in the inside of the operation unit 132 and sealed, whereby waterproofing and dustproofing are possible.

  However, the remote controller 130 shown in the comparative example has a structure for waterproofing and dustproofing only the equipment room 152 in which the potentiometer 162 is accommodated, and supports the trigger lever 160 which constitutes the trigger mechanism as illustrated in FIG. Since the shaft support portion 164 at the tip of the shaft 161, the spring 165 for biasing the trigger lever 160 to the operation start side, and the like are provided in the accommodation recess 151, there is a mechanism portion where sealing processing is not performed.

  Further, in the remote controller 130 of the comparative example, since the trigger support portion 150 has an integral structure that constitutes a part of the outer wall surface of the operation portion 132, the water and the dust that enter from the accommodation recess 151 There is a possibility that the inside of the part 132 may intrude. In addition, since the operation side opening As formed by the outer frame 154 of the housing recess 151 of the trigger lever 160 is in the form of a bottomed hole opened only downward, such a bottomed operation opening on the bottom side In the case where the remote controller 130 is placed upside down on a mounting object such as a table when it is As, when water or dust once intrudes into the accommodation recess 151, the entering water or dust is accommodated in the accommodation recess 151. It is difficult to discharge to the outside. Therefore, when the remote controller 130 is used in an adverse environment with a lot of water, dust and the like, there is a problem that the operability of the trigger lever 160 is lowered due to the performance deterioration of mechanical parts such as the bearing 164 and 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 for housing the trigger lever 60 is at least of the trigger lever 60 from the ceiling surface 51 d of the housing recess in a range facing the back side of the operation portion 32. Since the open back side opening Ah is provided along with the operation side opening As to the position beyond the support shaft 61, even if water or dust once intrudes into the accommodation recess 51, the water or sand dust Is easily discharged to the outside of the accommodation recess 51 from the back side opening Ah 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. In particular, if the back side opening Ah provided so as to be connected to the operation side opening As in the housing recess 51 is formed, the opening area is further increased, and the effect of improving the dischargeability of foreign matter such as water and dust is enhanced. 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 corresponds to the remote controller. Because 30 is formed on a flat surface that can be placed on the placement object, when the remote control device 30 is not used, the remote control device 30 can be stably placed on the placement object in an inverted posture Can.

  The ceiling surface 51 d of the housing recess 51 has a downward slope leading to the rear side opening Ah that is open toward the rear side when the remote controller 30 is placed on the placement target. Since it is formed, foreign matter such as water, sand dust and the like is placed on the back surface while the remote controller 30 is placed on the placement target even if water or sand dust intrudes into the housing recess 51 of the remote controller 30. It can be easily discharged from the side opening Ah. Therefore, water or sand dust is easily discharged from the accommodation recess 51 even in a bad environment with a lot of water, sand dust and the like, which is more preferable in setting a trigger mechanism that is less susceptible to adverse effects of water and dust.

  Furthermore, according to the remote controller 30 of the present embodiment, the trigger support portion 50 has 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 removed from the outside of the lower surface of the operation portion 32. Therefore, the trigger lever 60 and the accommodation recess 51 for accommodating 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 in order to provide a structure in which foreign substances such as water and dust do not easily intrude into the operation portion 32 from the housing recess 51. Therefore, it is more suitable for preventing or suppressing the performance deterioration of the trigger mechanism even in a bad environment with many water, dust and the like.

  Further, according to the remote controller 30 of the present embodiment, the trigger support portion 50 has an opening formed on both sides thereof and a support housing 56 having the accommodation recess 51 in the center thereof, and both sides of the support housing 56 Since it comprises two closed lids 55 and 57 which respectively close the opening and define a sealed space on the left and right of the housing recess 51, the sealed space is configured so as not to be exposed to the external environment , It is suitable in constructing the waterproof structure of the trigger mechanism.

In the trigger support portion 50, one of the left and right sealed spaces is a first sealed chamber 52, and in the first sealed chamber 52, a potentiometer 62 for detecting the amount of rotation of the trigger lever 60 is incorporated. The other of the closed spaces is a second closed chamber 53, and the second closed chamber 53 contains a torsion coil spring 65, which is a spring that regulates the initial position of the trigger lever 60. When it is set as the trigger support part 50 of such a unit structure, it is suitable as a structure of waterproofing reliably mechanical components other than the trigger lever 60. As shown in FIG.
In particular, according to the remote controller 30 of the present embodiment, the torsion coil spring 65 is built in the second closed chamber 53 sealed so as not to be exposed to the external environment, as compared with the comparative example described above. The torsion coil spring 65 can be protected from foreign matter such as water and dust.

  As described above, the trigger mechanism provided in the remote controller 30 of the present embodiment is not easily affected by water or dust, and in the case of the on-vehicle crane 1 equipped with the remote controller 30, the The influential trigger mechanism can prevent or suppress the performance degradation of the trigger mechanism and perform stable crane operation. In addition, the remote control which concerns on this invention, and a working machine loading type crane provided with this are not limited to the said embodiment, A various deformation | transformation is possible if it does not deviate from the meaning of this invention.

  For example, in the above embodiment, as the working machine mounted crane, the vehicle mounted crane mounted on the chassis frame between the cab and the platform of the vehicle such as a truck has been described by way of example. The present invention can be applied to a ship-mounted crane mounted on a ship as a working machine, as long as the crane is mounted on the working machine.

Further, for example, in the above embodiment, the trigger support 50 has been described as being provided with the second closed chamber 53 for housing the torsion coil spring 65, but the invention is not limited thereto. The torsion coil spring 65 may be disposed inside the accommodation recess 51 as in the comparative example without providing the two closed chamber 53.
Even with such a configuration, if the back side opening Ah provided so as to be connected to the operation side opening As in the accommodation recess 51 is formed, the effect of improving the dischargeability of foreign matter such as water and dust can be achieved. In addition to the rear side opening Ah, if a downward slope is further provided on the ceiling surface 51d of the housing recess 51 of the trigger lever 60, it is more preferable in improving the discharge effect of foreign matter 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, when water or dust enters the inside of the torsion coil spring 65, water between the lines of the torsion coil spring 65 or When dust adheres, the torsion coil spring 65 may become an obstacle, and water may be difficult to be discharged out of the accommodation recess 51. Therefore, as in the above embodiment, it is desirable to provide the second closed chamber 53 for accommodating the torsion coil spring 65 to seal the torsion coil spring 65 so as to facilitate the discharge of water from the accommodation recess 51.

  For example, when the trigger lever 60 is actuated, it is biased in the counterclockwise direction RW by the torsion coil spring 65 so as to return to the actuation start position. The torsion coil spring 65 has one end fixed to the trigger support 50 and the other end fixed to the support shaft 61. In operation, the biasing force causes friction at the fixed portion to generate wear powder. When electronic components such as the potentiometer 62 and the torsion coil spring 65 are in the same space, the scattered wear particles may enter between the electronic components and cause 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 embodiment, the trigger support portion 50 is described as an example in which the trigger lever 60 and the housing recess 51 for housing the trigger lever 60 are integrally removable from the operation portion 32. For example, as shown in the comparative example, part or all of the frame of the trigger support portion 50 may be integrally formed with the housing structure of the operation portion 32. However, in order to facilitate maintenance of the trigger mechanism and prevent or suppress performance degradation of the trigger mechanism even in an adverse environment with many water, dust, etc., the trigger support 50 is attached and detached as in the above embodiment. It is desirable to have a possible unit structure.

1 Vehicle mounted crane (working machine mounted crane)
2 outrigger 3 main body 4 base 5 hydraulic motor for turning 6 column 7 boom 8 hydraulic cylinder for boom expansion and contraction 9 hydraulic cylinder for boom relief 10 hydraulic motor for winch 11 winch 12 wire rope 13 hook 20 main control unit 21 receiver 30 remote control 31 Gripping part 32 Operation part 33 Operation panel 34 Top cover 35 Mounting surface 36 Arm guard 37 Mounting part (of trigger support part) 41, 42 Selection switch (operation switch)
43 to 47 Setting switch (operation switch)
50 trigger support (trigger mechanism)
51 accommodation recess 52 first closed chamber 53 second closed chamber 55 closed lid on the first closed chamber side 56 support housing 57 closed lid on the second closed chamber side 60 trigger lever 61 pivot 62 potentiometer 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,
A grip portion, an operation portion provided at an upper position of the grip portion and having a plurality of operation switches disposed in front of itself, and provided on a lower surface side of the operation portion to grip the grip portion And a trigger support portion capable of rotatably operating a trigger lever for speed adjustment,
The trigger support portion has a housing recess having a hole through which the support shaft pivotally supporting the trigger lever penetrates the left and right inner wall surfaces,
The housing recess includes an operation-side opening that is open in an operation range in which the trigger lever rotates.
A remote controller characterized in that the rear side of the operation portion has a rear side opening that is open 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 such that the operation side opening faces upward, the ceiling surface of the accommodation recess is formed by a surface having a downward slope leading to the back side opening The remote controller according to claim 1.   The remote control according to claim 1 or 2, wherein the trigger support portion has a unit structure in which the trigger lever and a housing recess for housing the trigger lever are integrally removable from the operation portion. The trigger support portion has the accommodation recess at its center,
It has a support case formed of a closed chamber juxtaposed to the left and right of the accommodation recess,
The closed chamber is open at both axial ends of the support shaft of the closed chamber, and the openings are in close contact with two closed lids so as to close each other.
One of the left and right sealed spaces contains a potentiometer for detecting the amount of rotation of the trigger lever, and the other of the left and right sealed spaces contains a spring for urging the trigger lever to an initial position. The remote controller according to 3. A work implement mounted crane comprising: a receiver provided on a work machine side; and a remote controller for performing necessary data transmission between the receiver and the machine body 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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