JP2016160613A - Hand guide roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hand guide roller capable of preventing an electronic switch from being broken owing to a collision against an obstacle during route change of a vehicle or changing of a steering rod and also improving cleanability against rain and dust while improving switch operability by arranging an operation panel provided with the electric switch on a rear face of an operation box.SOLUTION: A base end of an operation rod 21 is fitted to a rear part of a travel machine body 2 to be tilted between a work position and a storage position, and an operation box 24 is fitted atop of the operation rod 21. Both right and left sides of the operation box 24 are concealed with side face covers 24c, 24d, and extended from both right and left sides to a bottom face 24f to face each other across a first gap L1. An operation panel 24e provided with switches 47-49 is arranged on a rear face of the operation box 24 and rear ends of the side face covers 24c, 24d are projected backward from the operation panel 24e so as to form a protection wall 51 and a cut part 52.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a hand guide roller used for road surface compaction work such as asphalt pavement, and more particularly to a protective structure for an electric switch provided in an operation box.

  Among compaction machines that perform road surface compaction work using compaction wheels that also serve as running wheels, hand guide rollers are relatively small and lightweight non-boarding type vehicles that are compacted on sidewalks and narrow alleys. Widely used in work. For example, as described in Patent Document 1, this type of hand guide roller is configured such that a base end of a steering rod is connected to a rear portion of a traveling machine body on which an engine is mounted as a power source, and an operation box is connected to the distal end of the steering rod. It is attached. The vehicle is driven by operating the operation box. For this purpose, the operation box includes a steering grip for steering the hand guide roller, an accelerator lever for switching the operating state of the engine, and a forward / backward movement for switching the vehicle forward / backward. A lever, various electric switches, and the like are provided.

  Examples of the electric switch include a horn switch, a light switch, and a vibration switch for operating a vibration body. These electric switches are frequently operated during the operation of the vehicle. It is desirable to provide it at a position that is particularly easy to operate. Therefore, it is conceivable that the rear surface of the operation box closest to the operator in operation is an operation panel (corresponding to the rear plate portion 24f shown in FIGS. 4 and 6 in Patent Document 1), and various electric switches are provided on the operation panel. .

JP 2011-84879 A (FIGS. 4 and 5)

  However, the rear surface of the operation box is a position that is easy for an operator to operate, but is also a position that is easily damaged by collision with an obstacle during the compacting operation, and is also a position that is easily affected by rain and dust.

  That is, since the hand guide roller does not have a steering function in the rolling wheel, the operator changes the course of the vehicle by holding the steering grip provided in the operation box and operating it left and right. In that case, the operation box is displaced to either the left or right side around the vehicle body, but there are many cases where sufficient space cannot be secured around the vehicle in sidewalks and narrow alleys where hand guide rollers are exclusively used. For this reason, the operation box may collide with a surrounding obstacle such as a guard rail. In particular, the rear face of the operation box is displaced the most, so when an electrical switch is provided with the rear face as the operation panel, an obstacle may collide with the electric switch from the side and be damaged due to the displacement. There is.

  In addition, the steering rod that extends backward from the rear part of the traveling machine body becomes an obstacle when storing and transporting the hand guide roller. Therefore, the work position with the distal end directed rearward is centered on the base end connected to the traveling machine body. The steering rod can be tilted between two positions, that is, a retracted position with the tip directed upward. When storing and transporting, the steering rod is set to the retracted position, and at the start of compaction work, the steering rod is switched to the working position and used. There may be an obstacle at the destination. At this time, the obstacle collides with the electric switch from below and is damaged as the operation box is displaced.

  On the other hand, when the rear surface of the operation box is an operation panel, the operation panel faces upward when the steering rod is in the retracted position, and this posture is maintained unless the hand guide roller is used. The operation panel facing upward is raining or dust is accumulated, which requires cleaning.

  The present invention has been made to solve such problems, and the object of the present invention is to improve the switch operability by using the rear surface of the operation box as an operation panel provided with an electric switch. An object of the present invention is to provide a hand guide roller that can prevent electrical switches from being damaged due to collisions with obstacles when changing courses or switching a steering rod, and that can improve cleanability against rain and dust.

  In order to achieve the above object, a hand guide roller according to the present invention includes a traveling machine body having a rolling wheel, and a work position in which a proximal end is connected to a rear portion of the traveling machine body, and a distal end is directed rearward around the proximal end. And a steering rod that can tilt between two positions, a retracted position with the tip facing upward, and an operation panel that is attached to the tip of the steering rod and faces the rear when the steering rod is in the working position, An operation box provided with an electric switch for operating the traveling machine body on the operation panel, and provided on both the left and right sides of the operation panel, and at least the vertical length of the electric switch when the steering rod is in the working position. And a protective wall that projects rearward of the electrical switch and has at least one notch in the protective wall (Claim 1).

According to the hand guide roller configured as described above, the protective walls are provided on both the left and right sides of the operation panel, correspond to at least the length region in the vertical direction of the electric switch, and protrude rearward from the electric switch. For this reason, the electrical switch is covered with a protective wall from both the left and right sides, and when the operation box is displaced laterally as the vehicle changes its course, the protective wall collides with the obstacle and the electrical switch is switched to the electrical switch. Collisions are avoided. Also, when the operation box is displaced downward as the steering rod is moved from the retracted position to the working position, for example, the lower ends of the protective walls on both the left and right sides collide with obstacles first to avoid collision with the electric switch. Is done.
On the other hand, the protective wall has at least one notch. Therefore, in a state where the steering rod is in the retracted position, rain and dust on the operation panel are discharged to the outside through the notch, so that the cleanability can be improved.

As another aspect, the operation box has a lower surface, and the protective wall extends from the left and right sides of the operation panel to the lower side of the operation panel corresponding to the lower surface of the operation box when the steering rod is at the work position. In addition, it is preferable that a notch is formed on one side of the extended portion (claim 2).
According to the hand guide roller configured as described above, the electric switch is covered with the protective wall from below when the steering rod is in the working position. For this reason, when the operation box is displaced downward as the steering rod is switched from the retracted position to the working position, the extension of the protective wall collides with the obstacle first and avoids collision with the electric switch. Is done.

As another aspect, the operation box has a lower surface and side covers are attached to both the left and right sides to conceal the interior, and the both side covers are operated from the left and right sides of the operation box when the steering rod is in the working position. It extends to the lower surface of the housing and faces it with a first gap on the lower surface, and its rear end protrudes backward beyond the operation panel, and the protruding portion functions as a protective wall, and the first gap at the protruding portion is cut. It is preferable to configure so as to function as a notch (claim 3).
According to the hand guide roller configured as described above, the electric switch is covered with the protective wall from below when the steering rod is in the working position. For this reason, when the operation box is displaced downward as the steering rod is switched from the retracted position to the working position, the extension of the protective wall collides with the obstacle first and avoids collision with the electric switch. Is done.
Moreover, since the protective wall and the notch are formed by projecting the rear end of the side cover backward from the operation panel, it is possible to suppress an increase in cost.

As another aspect, at least a pair of electric switches are provided on the operation panel with a second gap in the left-right direction, and the protective wall has a notch portion set smaller than the second gap between the two electric switches. Thus, it is preferable that the size of the notch is set so as to be within the size of the second gap in the left-right direction when the second gap is projected onto the protective wall.
According to the hand guide roller configured as described above, since the electric switch is completely covered by the protective wall from below when the steering rod is in the working position, the electric switch is switched when the steering rod is switched from the retracted position to the working position. The collision of obstacles with is more reliably avoided.

As another aspect, at least a pair of electric switches are provided on the operation panel with a second gap in the left-right direction, and the side covers have a first gap smaller than the second gap of both electric switches. The first gap is set and functions as a notch so as to be within the dimension of the second gap in the left-right direction when the second gap is projected onto the protective wall. (Claim 5).
According to the hand guide roller configured as described above, since the electric switch is completely covered by the protective wall from below when the steering rod is in the working position, the electric switch is switched when the steering rod is switched from the retracted position to the working position. The collision of obstacles with is more reliably avoided.

As another aspect, it is preferable that the operation panel is inclined so as to face upward when the steering rod is in the retracted position and to be lowered toward the notch.
According to the hand guide roller configured as described above, in the state where the steering rod is in the retracted position, rain and dust move along the inclination on the operation panel and are guided to the notch, and through the notch, It is surely discharged outside.

  According to the present invention, the rear surface of the operation box is used as an operation panel provided with an electric switch to improve the switch operability, and the electric switch resulting from a collision with an obstacle when changing the course of the vehicle or switching the steering wheel Can be prevented, and the cleaning performance against rain and dust can be improved.

It is a front view which shows the hand guide roller of embodiment. It is a top view which similarly shows a hand guide roller. It is sectional drawing which shows the internal structure of the operation box when a steering rod is made into a work position. It is a perspective view when the operation box when the steering rod is set to the working position is viewed from the upper right side. It is a rear view when the operation box is viewed from the rear when the steering rod is in the working position. It is a perspective view when the operation box when the steering rod is set to the working position is viewed from the upper left. It is a perspective view when the operation box when the steering rod is in the retracted position is viewed from the diagonally left rear. It is a perspective view when another example operation box when the steering rod is in the retracted position is viewed from the left rear side.

Hereinafter, an embodiment of a hand guide roller embodying the present invention will be described.
FIG. 1 is a front view showing a hand guide roller of this embodiment, and FIG. 2 is a plan view showing the hand guide roller. In the following description, the front / rear, left / right, and up / down directions are expressed with reference to the hand guide roller.

The frame 3 of the traveling machine body 2 of the hand guide roller 1 (hereinafter sometimes referred to as a vehicle) is composed of an upper frame 3a and a lower frame 3b. The lower frame 3b includes a pair of front and rear rolling wheels 4 that also serve as running wheels, and an engine 5 that is a power source is mounted on the upper frame 3a.
Specifically, in the left half space on the upper frame 3a, the engine 5 and its accessory parts, an air cleaner 6, a muffler 7, a fuel tank 8, a starter 9, an alternator 10, and the like are mounted. Further, the right half of the upper frame 3a is concealed by the cover 11, and the space inside thereof is a hydrostatic transmission (hereinafter referred to as HST) driven by the engine 5 via the rubber coupling 12. A hydraulic pump 13, a pulley 14 with a built-in electromagnetic clutch driven by the engine 5 together with the hydraulic pump 13, and a battery 15 are mounted.

  An oil tank 16 in which hydraulic oil for HST is stored is mounted on the front part on the upper frame 3a, and a water spray tank 17 is mounted on the rear part on the upper frame 3a. The water stored in the water spray tank 17 is used to prevent the adhesion of the pavement material to the outer peripheral surface of the rolling wheel 4 and to promote the cooling of the pavement material after the rolling, and after the rolling operation. It is used for watering the road. Reference numeral 18 denotes a hanging hook for unloading the hand guide roller 1 from the transport vehicle.

The HST hydraulic pump 13 forms a closed circuit with a hydraulic motor (not shown) provided on the front and rear rolling wheels 4, and the hydraulic motor is actuated by the hydraulic oil supplied from the hydraulic pump 13 so that the rolling wheel 4 is operated. Are driven to rotate, whereby the vehicle 1 travels. An oscillating body 19 is pivotally supported in the lower frame 3b so as to be rotatable at both left and right ends (shown in FIG. 1). The oscillating body 19 is attached to the pulley 14 via a belt (not shown). It is connected.
The vibration generator 19 has a center of gravity at a position eccentric from the rotation axis. For example, in the work of compacting crushed stone on the roadbed, the electromagnetic clutch of the pulley 14 is connected and the vibration generator 19 is driven to rotate by the engine 5. Thus, vibration is generated, and the roadbed is compacted by the rolling wheel 4 efficiently.

  The rear end of the frame 3 is pivotally supported by a tilting shaft 20 at the base end of a steering rod 21, which has a working position (represented by a solid line in FIG. 1) extending rearward from the rear portion of the traveling vehicle body 2 and traveling. It tilts about the tilting axis 20 between two positions with a storage position (shown in phantom lines in FIG. 1) extending substantially vertically upward from the rear part of the airframe 2, and is fixed by a lock mechanism (not shown) at each position. It has become.

  A box-shaped operation box 24 made of a steel plate is attached to the front end (free end side) of the steering rod 21, and the operation operation of the hand guide roller 1 is performed by the operation box 24. The details of the operation box 24 will be described below. However, since the attitude of the operation box 24 changes according to the switching position of the steering rod 21, for convenience of explanation, the front and rear are based on the working position of the steering rod 21 shown by the solid line in FIG. , Express left and right, up and down directions.

  3 is a cross-sectional view showing the internal structure of the operation box 24, FIG. 4 is a perspective view when the operation box 24 is viewed from the upper right, FIG. 5 is a rear view when the operation box 24 is viewed from the rear, and FIG. FIG. 7 is a perspective view when the operation box 24 is seen from the upper left, and FIG. 7 is a perspective view when the operation box 24 is seen from the rear left, and only the operation box 24 of FIG. The operation box 24 in all other figures is represented by the posture when the steering rod 21 is switched to the work position.

The outer shell of the operation box 24 is formed by an upper surface 24a, a front inclined surface 24b formed slightly forward and formed on the front side of the upper surface 24a, left and right side surfaces 24c and 24d, a rear surface 24e and a bottom surface 24f (lower surface). The left and right side surfaces 24c and 24d are side covers that can be attached and detached by bolts 25 (hereinafter referred to as side covers 24c and 24d). The side covers 24c and 24d conceal the inside of the operation box 24 and the side covers 24c. , 24d can be removed to perform maintenance in the operation box 24.
As shown in FIGS. 5 and 7, the side covers 24c and 24d are bent at right angles from the left and right sides of the operation box 24 and extend to the bottom surface 24f of the operation box 24. Opposing the gap L1.

As shown in FIGS. 3 and 5, a forward / reverse lever 26 is disposed in an upright position on the right side of the upper surface 24a of the operation box 24, and an accelerator lever 27 is disposed in an upright position on the left side of the upper surface 24a. At the upper end of 26.27, lever grips 26a, 27a that are gripped by the operator when the lever is operated are respectively attached.
The lower ends of both levers 26 and 27 are inserted into the operation box 24 and supported by a common lever shaft 28 installed in the operation box 24 in the left-right direction. 27 can be individually tilted in the front-rear direction. A spring washer (not shown) is interposed on the lever shaft 28, and the levers 26 and 27 receive an appropriate frictional resistance and can be fixed at an arbitrary tilting position.

  In the operation box 24, a rod end 29 is connected to the forward / reverse lever 26, and this rod end 29 is connected to a tilt angle adjusting lever of the HST hydraulic pump 13 through a control wire (not shown). The tilt angle of the hydraulic pump 13 changes according to the tilting of the forward / reverse lever 26, and the hydraulic motor rotates forward and backward accordingly, and the vehicle 1 moves forward and backward. Specifically, at the neutral position of the forward / reverse lever 26, the hydraulic motor does not rotate and holds the vehicle 1 in a stopped state, and when the forward / reverse lever 26 is tilted forward from the neutral position, the hydraulic motor rotates forward. When the vehicle 1 is moved forward and the forward / reverse lever 26 is tilted rearward, the hydraulic motor reversely rotates the vehicle 1 backward.

Similarly, although not shown, a rod end is also connected to the accelerator lever 27 in the operation box 24, and this rod end is connected to the engine 5 via a control wire (not shown). Depending on the three tilting positions of the accelerator lever 27, the engine 5 is switched between a stopped state and a fully opened operation. Basically, during the compaction operation, the engine 5 is kept fully open to ensure the discharge amount of the hydraulic pump 13, and is kept stopped during transportation and storage of the vehicle 1.
Reference numeral 30 denotes an adjusting bolt for restricting the tilting range of the forward / reverse lever 26. Although not shown, the accelerator lever 27 is also provided with the same adjusting bolt.

On the rear surface 24e of the operation box 24, there is provided a reverse stop mechanism 33 for restricting unintended reverse movement of the hand guide roller 1. The guide pipe 34 of the reverse stop mechanism 33 is disposed and fixed so as to penetrate the rear surface 24e of the operation box 24, and an operation rod 35 is inserted into the guide pipe 34 so as to be slidable in the front-rear direction. The front end of the operation rod 35 is opposed to the lower part of the forward / reverse lever 26 in the operation box 24 via a gap, and the rear end of the operation rod 35 protrudes rearward from the guide pipe 34 and has a pad 36 fixed thereto. Accordingly, the pad 36 is positioned at the rearmost end of the hand guide roller 1 when the steering rod 21 is in the working position.
A compression spring 37 is interposed between the pad 36 and the rear end of the guide pipe 34 and is covered with a bellows 38. The operating rod 35 is urged rearward by the compression spring 37, and the stopper 35a prevents the guide pipe 34 from being released rearward.

  When the hand guide roller 1 is moved backward during the compacting operation, if the pad 36 of the reverse stop mechanism 33 hits the operator standing behind the operation box 24, the operation rod 35 slides forward while the compression spring 37 is contracted. To move the forward / reverse lever 26 tilting backward to the neutral position. As a result, the vehicle 1 is automatically stopped without requiring the operator to operate the forward / reverse lever 26.

  On the other hand, a key box 41 is attached to the forward inclined surface 24b of the operation box 24 as shown in FIGS. The key box 41 has a box shape made of a steel plate, and includes a key cylinder 42 for starting the engine 5, various indicator lamps 43, and an hour meter 44.

Specifically, the outline of the key box 41 includes a front surface 41b, a rear surface 41c, an upper surface 41d, a left side surface 41e, and a right side surface 41f with a bottom surface 41a overlapping the forward inclined surface 24b of the operation box 24 as a base. In addition, the key cylinder 42, the indicator lamp 43, and the hour meter 44 described above are accommodated. A key insertion opening 42a (shown in FIG. 3) of the key cylinder 42 is exposed on the right side surface 41f of the key box 41, and the key 45 can be inserted and removed from the right side. The operator rotates the key 45 inserted into the key insertion slot 42a to start the engine 5.
As shown in FIG. 4, the right side surface 41f is recessed in the key box 41 in order to protect the key cylinder 42 from rain and dust and to prevent the key cylinder 42 from being damaged by collision with an obstacle. Formed in position.

  The indicator lamp 43 is exposed on the rear surface 41c of the key box 41, and is composed of an ignition ON display, a low engine oil pressure warning, and a glow display. The hour meter 44 is exposed on the left side surface 41e of the key box 41 and has a function of sequentially integrating and displaying the ignition ON time of the engine 5. The ignition ON time displayed on the hour meter 44 is regarded as the operating time of the hand guide roller 1 up to the present, and is used for determining the maintenance time.

  On the other hand, as shown in FIGS. 5 and 7, the rear surface 24e of the operation box 24 functions as an operation panel (hereinafter referred to as the operation panel 24e), and a horn switch 47, a light switch 48, and a vibration switch 49 are provided as electrical switches. ing. The traveling machine body 2 is equipped with a horn for alerting the surroundings and a light for illuminating the front, and these horns and lights are arbitrarily operated in accordance with the operation of the horn switch 47 and the light switch 48. It has become. The vibration switch 49 turns on and off the electromagnetic clutch of the pulley 14 described above, so that the operator during the compacting operation can arbitrarily operate and stop the vibrator 19 by operating the vibration switch 49. Yes.

  As shown in FIG. 4, the operation panel 24 e faces rearward when the steering rod 21 is in the working position. Further, as apparent from the angle difference between the horizontal plane and the operation panel 24e shown in FIG. 7, when the steering rod 21 is in the retracted position, the operation panel 24e faces upward and faces backward. It is inclined downward (that is, toward a notch 52 to be described later).

  As described above, the side covers 24c and 24d face each other with the first gap L1 at the bottom surface 24f of the operation box 24 (corresponding to the lower side of the operation panel 24e), and keep the first gap L1. In this state, as shown in FIGS. 4 and 6, the rear ends of the side covers 24c and 24d protrude beyond the operation panel 24e in the shape of eaves behind the switches 47 to 49. As will be described below, this protruding portion functions as a protective wall 51 for protecting the switches 47 to 49 on the operation panel 24e, and the protective walls 51 are formed on the left and right sides and the lower side of the operation panel 24e. It will be. Further, the first gap L1 at the protruding portion functions as a notch 52, and the operation panel 24e and the outside (around the operation panel 24e) communicate with each other through the notch 52.

As shown in FIG. 5, the horn switch 47 is disposed at the upper left position on the operation panel 24e, the light switch 48 is disposed at the lower left position on the operation panel 24e, that is, directly below the horn switch 47, and the vibration switch 49 is operated. It is arranged at the lower right position on the panel 24e.
The vertical region Lw1 of the left protective wall 51 corresponds to the vertical region Ls1 of the horn switch 47 and the light switch 48 (specifically, a wider region in the vertical direction). The area Lw2 in the direction corresponds to the area Ls2 in the vertical direction of the vibration switch 49 (specifically, a wider area in the vertical direction), and the protective walls 51 protrude rearward from the switches 47 to 49. For this reason, the switches 47 to 49 are completely covered by the protective wall 51 from both the left and right sides.

  On the operation panel 24e, the light switch 48 and the vibration switch 49 are provided side by side with a second gap L2 in the left-right direction. Compared to the second gap L2, the distance between the left and right side covers 24c, 24d The first gap L1 formed by the notch 52 is set to be small, and is within the dimension of the second gap L2 in the left-right direction when the second gap L2 is projected onto the protective wall 51. The dimensions of the notch 52 are set. Accordingly, when the steering rod 21 is in the working position, the protruding portions of the side covers 24c, 24d located on the left and right sides of the first gap L1 function as the protective wall 51, and the protective wall 51 is the light switch 48. And the region corresponding to the left and right direction of the vibration switch 49 (specifically, a region wider in the left and right direction), and protrudes rearward from the switches 47 to 49. For this reason, the switches 47 to 49 are completely covered by the protective wall 51 from below.

On the operation box 24, a steering grip 50 is disposed so as to extend in the front-rear direction passing between the forward / reverse lever 26 and the accelerator lever 27 described above. The steering grip 50 is formed of a steel pipe as a raw material and has both front and rear ends curved downward. The front end is welded to the front end of the steering rod 21 and the rear end is welded to the guide pipe 34 of the reverse stop mechanism 33.
Compared with the accelerator lever 27, the forward / reverse lever 26 is remarkably long and is extended to the upper side of the steering grip 50 and bent to the left side in a crank shape. As a result, the lever grip 26a of the forward / reverse lever 26 is positioned immediately above the steering grip 50, and the steering grip 50 is formed in an arc shape so as to follow the arc-shaped movement trajectory of the lever grip 26a as the forward / reverse lever 26 tilts. It is curved.

As described above, the hand guide roller 1 of the present embodiment is configured. In the compaction work, the steering wheel 21 is switched to the work position, and the rolling wheel 4 is rotationally driven by the HST hydraulic motor using the engine 5 as a drive source, whereby the hand guide roller 1 travels and compacts the road surface. Then, the operating operator operates the steering grip 50 to change the course of the vehicle 1 and operates the hand guide roller 1 by appropriately operating the forward / reverse lever 26 and the like.
During operation of the vehicle 1, the switches 47 to 49 on the operation panel 24e are frequently operated. In the present embodiment, since the operation panel 24e is provided on the rear surface of the operation box 24 closest to the operator who is working, good switch operability is achieved and the compacting operation can be performed efficiently.

  In such a compacting operation, as described in [Problems to be Solved by the Invention], with the hand guide roller of Patent Document 1, the lateral displacement of the operation box when the vehicle 1 is changed, or As the steering rod 21 is displaced from the retracted position to the working position, the electric switch on the operation panel may collide with an obstacle and be damaged in accordance with the displacement of the operation box downward. Further, when the steering rod 21 is in the retracted position, it is raining on the operation panel or dust is accumulated, which requires complicated cleaning.

In the hand guide roller 1 of the present embodiment, the above problems are solved by the protective wall 51 and the notch 52 formed around the operation panel 24e, and the operation will be described below.
First, the protective walls 51 are formed on both the left and right sides of the operation panel 24e, and completely cover the horn switch 47, the light switch 48, and the vibration switch 49 from both the left and right sides. As a result, when the operation box 24 is displaced laterally along with the change of the course of the vehicle 1, the protective wall 51 collides first with the obstacle and the collision with the switches 47 to 49 is avoided.

  The protective wall 51 is also formed on the lower side of the operation panel 24e with a first gap L1, and completely covers the light switch 48 and the vibration switch 49 from below. As a result, when the operation box 24 is displaced downward in accordance with the switching from the storage position of the steering rod 21 to the work position, the protective wall 51 collides first with the obstacle and the switches 47 to 49 are moved to. Collisions are avoided.

Although the protective wall 51 is not formed on the upper side of the operation panel 24e, the steering grip 50 is located above the protective wall 51. For this reason, when the operation box 24 is displaced upward as the steering rod 21 is switched from the working position to the retracted position, the steering grip 50 collides with an obstacle and the collision with the switches 47 to 49 is avoided. The
Accordingly, in any case, it is possible to prevent the switches 47 to 49 on the operation panel 24e from colliding with an obstacle and being damaged.

  On the other hand, as shown in FIG. 7, with the steering rod 21 in the retracted position, the operation panel 24e is inclined to face upward and to fall downward. A notch 52 is formed by a first gap L1 on the lower side of the operation panel 24e, and the operation panel 24e communicates with the outside via the notch 52. Therefore, even if it rains on the operation panel 24e or dust accumulates, the rain and dust move along the inclination on the operation panel 24e as shown by a thick solid line in the figure. It is guided to the part 52 and discharged to the outside through the notch part 52. Therefore, the cleanability of the switches 47 to 49 due to rain and dust can be improved.

  In addition, in the present embodiment, the left and right sides of the operation box 24 are concealed by detachable side covers 24c and 24d, and extend from the left and right sides to the bottom surface 24f of the operation box 24 with a first gap L1 facing each other. I am letting. And the protective wall 51 and the notch part 52 are formed by making the rear end of these side covers 24c and 24d protrude rearward from the operation panel 24e. Therefore, compared with the case where the protective wall 51 and the notch 52 are formed by independent members, for example, the above-described various effects can be obtained while suppressing an increase in cost.

By the way, the shape of the protective wall 51 is not limited to this embodiment, and can be variously changed, and another example will be described below.
In short, in this alternative example, the protective wall 51 is formed in the minimum necessary area for obtaining the above-described effects. FIG. 8 is a perspective view of another example of the operation box when the steering rod 21 is in the retracted position when viewed from the diagonally left rear.

Similar to the above-described embodiment, the rear ends of the side covers 24c and 24d protrude beyond the operation panel 24e in an eaves shape behind the switches 47 to 49. The protruding portion functions as the protective wall 51. The protective wall 51 is formed only in a region corresponding to the vertical direction of the switches 47 to 49 on both the left and right sides of the operation panel 24e.
That is, the protective wall 51 by the left side cover 24c is formed in a region Lw1 (specifically, a region slightly wider in the vertical direction) corresponding to the vertical region Ls1 of the horn switch 47 and the light switch 48. Further, the protective wall 51 by the right side cover 24d is formed in a region Lw2 (specifically, a slightly wider region in the vertical direction) corresponding to the region Ls2 in the vertical direction of the vibration switch 49. A protective wall 51 is not formed in a region on the lower side of the operation panel 24e (corresponding to the bottom surface 24f), and this region functions as a notch 52 that connects the operation panel 24e and the outside.

In another example configured in this way, the protective walls 51 on both the left and right sides completely cover the switches 47 to 49 from both the left and right sides, so that the operation box 24 is positioned to the side as the course of the vehicle 1 changes. When displaced, damage to each of the switches 47 to 49 due to collision with an obstacle is avoided. In addition, the protective wall 51 is not formed in the lower side region of the operation panel 24e, but when the operation box 24 is displaced downward in accordance with switching from the storage position of the steering rod 21 to the work position, The lower ends of the protective walls 51 on both the left and right sides collide with the obstacle first. For this reason, damage of each switch 47-49 by the collision with an obstruction is avoided.
On the other hand, in the state where the steering rod 21 is in the retracted position, rain and dust on the operation panel 24e are discharged to the outside through the notch 52, and therefore, the cleaning performance around the switches 47 to 49 caused by rain and dust. Can be improved.

This is the end of the description of the embodiment, but the aspect of the present invention is not limited to this embodiment. For example, in the above embodiment, the left and right sides of the operation box 24 are concealed by detachable side covers 24c and 24d, and extend from the left and right sides to the bottom surface 24f, and the rear ends of the side covers 24c and 24d are rearward from the operation panel 24e. Although the protective wall 51 and the notch 52 were formed by projecting to, it is not restricted to this.
For example, the side covers 24c and 24d may not be removable, or the protective wall 51 may be formed of independent members around the operation panel 24e regardless of the side covers 24c and 24d. Further, a hole penetrating one side of the protective wall 51 may be used as the notch 52.

In the above embodiment, the horn switch 47, the light switch 48, and the vibration switch 49 are provided on the operation panel 24e. However, other types of electric switches may be provided, and various indicator lights 43 on the key box 41, The hour meter 44 may be moved on the operation panel 24e.
In the above-described embodiment, the operation panel 24e is tilted so as to face upward and downward while the steering rod 21 is in the retracted position, and the notch 52 is formed on the lower side of the tilt. The angle of the operation panel 24e and the position of the notch 52 are not necessarily limited to this, and may be arbitrarily changed.

2 traveling machine body 4 rolling wheel 21 steering rod 24 operation box 24c left side cover 24d right side cover 24e operation panel 47 horn switch (electric switch)
48 Light switch (Electric switch)
49 Vibration switch (electric switch)
51 Protective wall 52 Notch L1 1st gap L2 2nd gap Ls1, Ls2 Switch area Lw1, Lw2 Protective wall area

Claims (6)

A traveling aircraft with rolling wheels,
A steering rod having a proximal end connected to the rear portion of the traveling machine body and capable of tilting between two positions, a working position with the distal end directed rearward and a retracted position with the distal end directed upward, with the proximal end as a center,
An operation panel attached to the tip of the steering rod and facing backward when the steering rod is in the working position is provided, and an electric switch for operating the traveling vehicle body is disposed on the operation panel. Operation box
A protective wall provided on each of the left and right sides of the operation panel, corresponding to at least the length region in the vertical direction of the electric switch when the steering rod is in the working position, and protruding backward from the electric switch; Equipped,
A hand guide roller having at least one notch in the protective wall. The operation box has a lower surface,
The protective wall extends from both the left and right sides of the operation panel to the lower side of the operation panel corresponding to the lower surface of the operation box when the steering rod is in the working position. The hand guide roller according to claim 1, wherein the cutout portion is formed on one side. The operation box has a lower surface, and side covers are attached to both the left and right sides to conceal the interior,
The both side covers extend from the left and right sides of the operation box to the lower surface of the operation box when the steering rod is in the working position, and face each other with a first gap on the lower surface. 3. The projection according to claim 1, wherein the projection protrudes rearward beyond the operation panel and functions as the protective wall, and the first gap at the projection functions as the notch. Hand guide roller. On the operation panel, at least a pair of the electric switches are provided with a second gap in the left-right direction,
In the protective wall, the notch is set to be smaller than the second gap between the two electrical switches, and the second gap is projected within the dimension of the second gap in the left-right direction when projected onto the protective wall. The hand guide roller according to claim 2, wherein the size of the notch is set so as to be within a range. On the operation panel, at least a pair of the electric switches are provided with a second gap in the left-right direction,
The both side covers have a second gap in the left-right direction when the first gap is set to be smaller than the second gap of the two electric switches and the second gap is projected onto the protective wall. The hand guide roller according to claim 3, wherein the first gap is set so as to be within a dimension and functions as the notch. 6. The operation panel according to claim 2, wherein the operation panel is inclined so as to face upward when the steering rod is in a retracted position and to be lowered toward the notch. Hand guide roller.

Images