JP2011026944A - Steering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steering device, capable of regulating two-way simultaneous operation of an operating member without needing folding operation of the operating member. <P>SOLUTION: The steering device includes a rocking bracket 25 supported by a support member 24 to be rockable in a first operating direction A, and a bearing member 23 supported by the rocking bracket 25 to be rockable in a second operating direction B, in which rocking operation of the operating member 22 can be performed in two directions of the first operating direction A and the second operating direction B by providing the operation member 22 on the bearing member 23. A regulation means is provided between the support member 24 and the bearing member 23. The regulation means regulates the rocking of the operating member 22 in the second operating direction B when the operating member 22 is rocked in the first operating direction A, and regulates the rocking of the operating member 22 in the first operating direction A when the operating member 22 is rocked in the second operating direction B. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a control device provided with an operation member such as an operation pedal that can swing in two directions: a first operation direction and a second operation direction that intersects the first operation direction.

Conventionally, as an example, a control device including an operation pedal as an operation member capable of swinging in two directions is disclosed in Patent Document 1, and the control device described in Patent Document 1 is provided in a backhoe. .
The backhoe has a swivel mounted on the traveling device so as to be able to swivel about a vertical swivel axis, and a swing bracket that can swing left and right about a vertical axis is provided at the front of the swivel. The swing bracket is configured to swing from side to side with a hydraulic cylinder.

The swing bracket is pivotally supported on the base end side of the boom, and an arm is pivotally supported on the tip end side of the boom. A bucket is swingably mounted on the tip end side of the arm, and the bucket Instead of this, a hydraulic attachment such as a hydraulic breaker can be mounted.
The operation pedal equipped in this backhoe that can be operated in two directions can be swung in two directions, front and rear, and left and right, and the hydraulic attachment can be operated by the front and rear rocking operation. The swing bracket can be swung left and right by operation.

The operation pedal is attached to a support member, and this support member is supported by a swing bracket supported by a support member so as to be swingable back and forth so as to be swingable left and right.
The operation pedal includes a front pedal having left and right step portions extending from the center step portion to the left and right sides, and a rear pedal extending from the front pedal side to the rear side. It is foldable on the center pedal of the front pedal.

  In this operation pedal, in order to prevent simultaneous operation of the front and rear and the left and right, in the deployed state where the rear pedal is extended from the front pedal to the rear side, the engaging portion provided on the rear pedal is By engaging the engaged portion provided on the swing bracket, the swinging operation of the operation pedal can be performed back and forth while the swinging operation of the left and right of the operation pedal is restricted, and the rear pedal is folded onto the front pedal. The operation pedal can be swung left and right.

Japanese Patent Laid-Open No. 9-13426

For example, in the above-described backhoe, when the swing bracket swing operation and the hydraulic attachment operation are frequently performed separately, the rear pedal must be repeatedly folded and unfolded.
Then, this invention aims at solving the said subject.

The technical means taken by the present invention to solve the technical problem includes a swing bracket supported on a support member so as to be swingable in a first operation direction, and the swing bracket has a second operation direction. A steering member including a support member that is swingably supported, and an operation member is provided on the support member so that the operation member can be swung in two directions of the first operation direction and the second operation direction. In the device
When the operation member swings in the first operation direction, the operation member is restricted from swinging in the second operation direction, and when the operation member swings in the second operation direction, A restricting means for restricting swinging in one operation direction is provided between the support member and the support member.

The support member is swingably supported by the swing bracket via a pivot above the swing support shaft that swingably supports the swing bracket. The upper part is provided above the pivot, and the restricting means is preferably disposed below the pivot.
Further, the restricting means is provided on the support member, and an engaging portion that swings integrally with the support member;
The support member is provided on the support member, and when the operation member is swung in one of the first operation direction and the second operation direction, the other of the first operation direction and the second operation direction of the engagement portion A restricting portion for restricting swinging of the operation member in the other operation direction by restricting movement in the operation direction;
It is formed in this restricting portion, and when the operation member is swung in the other operation direction, the operation member is allowed to swing in the other operation direction and the operation member is swung in the one operation direction. Therefore, it is preferable that the engaging portion is constituted by a rocking restriction guide portion to be inserted.

In addition, it is preferable that a pair of the restricting portions are provided as opposed to each other in the other operation direction so as to sandwich the engaging portion, and a swing restricting guide portion is formed in each restricting portion.
Further, it is preferable that the engaging portion is constituted by at least one rotating member that rotates by contacting the restricting portion or the swing restricting guide portion when the operating member is swung.
The pair of restricting portions are opposed to each other in the second operation direction, and a swing support shaft having an axis in the second operation direction is provided between the restricting portions,
The swing bracket includes a first boss portion that is externally fitted to the swing support shaft so as to be rotatable about an axis, an arm portion extending upward from the first boss portion, and an upper end of the arm portion. A second boss portion fixed to the side and having an axis parallel to an axis perpendicular to the axis of the first boss portion,
The support member has a shape extending up and down from the pivot on one end side of the pivot supported by the second boss portion of the swing bracket so as to be rotatable about the axis.
An operation member may be provided on the upper end side of the support member, the lower end side of the support member may be inserted between the restricting portions, and the engagement portion may be provided on the lower end side of the support member.

Further, the swing restriction guide portion may be formed to be displaced from the position immediately below the swing support shaft in the first operation direction and on the one end side of the pivot.
Further, the pair of restricting portions are opposed to each other in the first operation direction, and one end side in the second operation direction is fixed to a support wall provided on the support member,
The support wall is provided with a swing support shaft that has an axis in the second operation direction and is positioned above the restricting portion,
The swing bracket is supported on the swing support shaft so as to be rotatable about an axis, and is provided on an upper portion of the first plate and extending upward from the swing support shaft. A second plate and a cylindrical member disposed on the upper side of the swing support shaft and fixed to the second plate and having an axis in the first operation direction;
The support member is fixed to a pivot that is rotatably supported about the axis of the tube member of the swing bracket,
The support member may be provided with an operation member disposed on the upper side of the pivot, and a support rod having a lower portion inserted between the restricting portions may be provided, and the engagement portion may be provided below the support rod.

In addition, the engaging portion is displaced in the second operation direction from directly below the pivot while the operation member is positioned at the neutral position.
The engaging portion swings upward from the neutral position to the other of the second operation direction by swinging the operation member from the neutral position to one of the second operation directions. Is configured to swing in one direction of the second operation direction and move down.
The height of the restricting portion is formed such that the side where the engaging portion swings from the neutral position to the other side is high, and the side where the engaging portion swings from the neutral position to the one side is low,
The swing support shaft may be disposed above the lower side of the restricting portion and in the vicinity of the upper end of the restricting portion.

  According to the control device of the present invention, the folding operation of the operation pedal as in the prior art is not required, and simultaneous operation of the operation member in two directions can be restricted, which is convenient.

It is a side view of the control device concerning a 1st embodiment. It is a side view of a backhoe. It is a top view of the operating device of the front part of a backhoe. It is a front view of the operating device of the front part of a backhoe. It is a front view of the control device concerning a 1st embodiment. It is a top view of the control device concerning a 1st embodiment. It is side surface sectional drawing of the control apparatus which concerns on 1st Embodiment. It is front sectional drawing of the control apparatus which concerns on 1st Embodiment. It is side surface sectional drawing of the control apparatus which concerns on 2nd Embodiment. It is front sectional drawing of the control apparatus which concerns on 2nd Embodiment. It is a side view of the control device concerning a 3rd embodiment. It is a rear view of the control apparatus which concerns on 3rd Embodiment. It is a top view of the control device concerning a 3rd embodiment. It is side surface partial sectional drawing of the control apparatus which concerns on 3rd Embodiment. It is a back surface partial sectional view of the control device concerning a 3rd embodiment. It is a rear view which shows rocking | fluctuation operation | movement of the operating pedal which concerns on 3rd Embodiment. It is a side view which shows rocking | fluctuation operation | movement of the operation pedal which concerns on 3rd Embodiment. It is side surface sectional drawing of the engaging part and regulation part (regulation wall) which concern on 3rd Embodiment. It is a plane sectional view of the engaging part and restriction part (regulation wall) concerning a 3rd embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 8 show a first embodiment.
In FIG. 2, reference numeral 1 denotes a backhoe (work machine). This backhoe 1 is mainly composed of a lower traveling device 2 and an upper revolving unit 3.
The traveling device 2 has a crawler traveling mechanism in which an endless belt-like crawler belt 7 is wound around an idler 5 provided at the front portion of the track frame 4 and a sprocket 6 provided at the rear portion of the track frame 4. The crawler type traveling device is provided on both sides.

The swivel body 3 includes a swivel base 8 that is mounted on the track frame 4 of the traveling device 2 so as to be able to swivel about a swivel axis in the vertical direction, and a work device 9 (excavation work) provided at a front portion of the swivel base 8. Apparatus) and a driver's seat 10 provided on the swivel base 8.
A swing bracket 11 is provided at the front portion of the swivel base 8 so as to be able to swing left and right around an axis in the vertical direction. The swing bracket 11 is moved to the left and right by extending and retracting a swing cylinder composed of a double-acting hydraulic cylinder. Swing operation is performed. A swing control valve for controlling the swing cylinder is provided in the swivel base 8.

This swing control valve is composed of, for example, a direct acting spool type switching valve provided with a spool that can be switched from the neutral position to one or the other in the axial direction, and switches the spool from the neutral position to one or the other in the axial direction. Thus, the flow of the pressure oil is switched to control the swing cylinder.
The working device 9 includes a boom 12 whose base end side is pivotally connected to the swing bracket 11 so as to be rotatable about the left and right axis, and a base end side pivotally connected to the distal end side of the boom 12 so as to be rotatable about the left and right axis. The arm 13 and a bucket 14 mounted on the tip side of the arm 13 so as to be freely squeezed and dumped (oscillated).

Further, when a hydraulic attachment such as a hydraulic breaker, a hydraulic crusher, or a hydraulic auger is attached to the tip side of the arm 13 instead of the bucket 14, it is connected to a hydraulic actuator equipped on the hydraulic attachment via a hydraulic hose. A hydraulic pressure take-out portion 16 is provided.
An attachment control valve for controlling a hydraulic actuator provided in the hydraulic attachment is provided in the swivel base 8, and the attachment control valve is connected to the hydraulic pressure take-out part via a hydraulic line including a hydraulic hose, a hydraulic pipe, and the like. 16 is connected.

The attachment control valve is composed of, for example, a direct acting spool type switching valve having a spool that can be switched from the neutral position to one or the other in the axial direction, and the spool is moved from the neutral position to one or the other in the axial direction. By switching, the hydraulic actuator is controlled by switching the flow of pressure oil.
The driver's seat 10 is provided in the rear part of the turntable 8, and a pair of left and right traveling levers 17 for operating the left and right crawler traveling mechanisms of the traveling device 2 are provided on the front side of the driver's seat 10.

As shown in FIGS. 3 and 4, a support base 18 that supports the left and right traveling levers 17 so as to be swingable back and forth is provided at the front portion of the swivel base 8.
The support base 18 includes a pair of left and right vertical plates 20 rising from a fixed base plate 19 on the bottom side in the swivel base 8, and a connecting member 21 that connects the left and right vertical plates 20.
A swing control valve and an attachment control valve are operated on the upper side of the step 63 (the step board constituting the upper surface of the swivel base 8 on the front side of the driver's seat 10) on the side (right side) of the traveling lever 17 ( An operating pedal 22 (operating member) that operates the swing bracket 11 and the hydraulic attachment is disposed (see FIG. 1).

As shown in FIGS. 1 to 8, the operation pedal 22 includes a first operation direction A and a second operation direction B that is different from the first operation direction A (orthogonal to the first operation direction A). It can be swung in two directions.
In the present embodiment, the first operation direction A is an inclination direction that shifts to the right as it goes forward (a direction that is inclined diagonally right forward with respect to the front-rear direction), and the second operation direction B that goes to the right. It is set as the inclination direction which shifts to the rear (the direction inclined rearward and obliquely to the right).

The operation pedal 22 is provided on the upper end side of a support member 23 (hereinafter referred to as a pedal support member 23). The pedal support member 23 is supported by the swing bracket 25 so as to be swingable in the second operation direction B (swing to the left and right). The swing bracket 25 is supported by the support member 24 so as to be swingable in the first operation direction A (movable back and forth).
Thereby, the operation pedal 22 can be swung in the first operation direction A and the second operation direction B (back and forth and right and left).

The support member 24 includes a belt-like support plate 26 that is long in the left-right direction and arranged so that the plate surface faces up and down, and a pair of left and right restricting portions 27 (hereinafter, referred to as plate members fixed to the support plate 26). This is referred to as a regulation wall 27).
The support plate 26 has a left end overlapped on the upper wall 20a of the vertical plate 20 on the right side of the support base 18 and is bolted to the upper wall 20a, and protrudes rightward from the upper wall 20a. Has been.

The left and right restricting walls 27 are opposed to each other with an interval in the second operation direction B, and the front upper part of the right (right and left outer side) restricting wall 27 is fixed to the right end of the support plate 26, and the left (right and left) The upper end of the front portion of the regulating wall 27 on the inner side in the direction is fixed to the lower surface of the support plate 26.
The rear side of the right and left regulating walls 27 is extended backward from the support plate 26. A swing support shaft 28 having an axis X in the second operation direction B is provided at the rear part of the left and right regulating walls 27. The swing support shaft 28 is constituted by a headed pin, passes through the left and right regulating walls 27, and is prevented from being detached by a retaining pin attached to the tip side.

  The swing bracket 25 includes a cylindrical first boss portion 29 that is externally fitted to the swing support shaft 28 so as to be rotatable about an axis X, and an arm that extends upward from the first boss portion 29. And a cylinder having an axis Y in the first operation direction A (an axis Y parallel to the axis perpendicular to the axis X of the first boss 29), which is fixed to the upper end of the arm 30. Second boss portion 31 and a lever portion 32 extending downward from the first boss portion 29.

The arm portion 30 and the lever portion 32 are made of a flat plate material, are arranged vertically so that the plate surface faces the second operation direction B, and are fixed to the central portion in the axial direction of the first boss portion 29. ing.
The arm portion 30 is disposed so as to cross the rear side of the support plate 26 from the lower surface side to the upper surface side of the support plate 26, and the second boss portion 31 is located above the support plate 26.

  A ball joint 33a (ball joint) on the front end side of the first interlocking link 33 is connected to the lower part of the lever portion 32 from the side, and a ball joint 33b on the rear end side of the first interlocking link 33 is connected to the bell crank 34. It is connected to one end side from below. A middle portion of the bell crank 34 is supported by a support member fixed to the base plate 19 so as to be rotatable about a vertical axis, and the other end side of the bell crank 34 is connected to the attachment control valve via an interlocking means such as a rod or a link mechanism. It is linked to.

The pedal support member 23 is formed of a flat plate material that is long in the vertical direction, and is disposed so that the plate surface faces the first operation direction A, and is disposed behind the second boss portion 31. A pivot 35 having an axis Y in the first operation direction A is provided in the middle of the pedal support member 23 in the vertical direction.
The pivot 35 penetrates the pedal support member 23 in the plate thickness direction, and one end side in the axial center Y direction (the rear end side in this embodiment) is fixed to the pedal support member 23. Therefore, the pedal support member 23 extends vertically from the pivot 35.

Further, the pivot 35 is inserted into and supported by the second boss portion 31 of the swing bracket 25 so as to be rotatable around the axis Y from the rear side. As a result, the middle part of the pedal support member 23 in the vertical direction is supported on the swing bracket 25 so as to be swingable in the second operation direction B above the swing support shaft 28.
A mounting plate 36 is provided in the middle of the pedal support member 23 in the vertical direction and below the pivot 35. The mounting plate 36 is made of a plate material, is disposed sideways so that the plate surface faces up and down, and is fixed to the rear surface of the pedal support member 23.

A reinforcing plate 15 is disposed below the mounting plate 36, and the reinforcing plate 15 is fixed to the lower surface of the mounting plate 36 and the rear surface of the pedal support member 23.
A ball joint 37a on the right end side of the second interlocking link 37 is connected to the mounting plate 36 from below.
On the rear side of the ball joint 37 b on the left end side of the second interlocking link 37, a first relay lever 38 whose rear end side is supported by a support member fixed to the base plate 19 so as to be rotatable about a vertical axis is provided. The ball joint 37b on the left end side of the second interlocking link 37 is connected to the front end of the first relay lever 38 from the front.

A second relay lever 39 that swings integrally with the first relay lever 38 is provided on the rear side of the first relay lever 38. Swing control is performed on the second relay lever 39 via an interlocking rod 40 and the like. The valves are linked and connected.
An operation pedal 22 is provided on the upper end side of the pedal support member 23. Accordingly, the operation pedal 22 can be swung back and forth (in the first operation direction A) around the axis X of the first boss portion 29 of the swing bracket 25 and the second of the swing bracket 25. The boss 31 can be swung left and right (in the second operation direction B) around the axis Y of the boss portion 31.

The operation pedal 22 includes a front pedal 41 having left and right step portions 41b extending from the center step portion 41a to the left and right sides, and a rear pedal 42 extending rearward from the front pedal 41 side. And.
The front portion of the central step portion 41a of the front pedal 41 is extended forward from the left and right step portions 41b, and the rear end of the central step portion 41a is fixed to a support tube 43 fixed to the upper end of the pedal support member 23. Has been.

The support cylinder 43 has an axis in the second operation direction B, and rotating cylinders 44 are arranged concentrically on the left and right sides of the support cylinder 43, and rotate around the support cylinder 43 and the rotation cylinder 44. The support shaft 45 is inserted.
Further, the left and right sides of the front end of the rear pedal 42 are fixed to the rotating cylinder 44 so that the rear pedal 42 is rotatable around the axis of the support cylinder 43, and the rear pedal 42 is rotated. Thus, the rear pedal 42 can be freely changed between a folded state (see FIG. 7) superimposed on the front pedal 41 and a deployed state extending rearward from the front pedal 41 side. .

The left and right rotating cylinders 44 are provided with stopper pieces 46 that restrict downward rotation of the rear pedal 42 by contacting the lower surface of the front pedal 41 when the rear pedal 42 is in the deployed state. Yes.
By folding the rear pedal 42 on the front pedal 41, the operation pedal 22 can be made compact in the front-rear direction when the attachment control valve is not used.

A lower portion of the pedal support member 23 is inserted between the left and right regulating walls 27 on the rear side of the first boss portion 29 of the swing bracket 25. An engaging portion 47 is integrally formed on the lower end side of the pedal support member 23.
Therefore, the engaging portion 47 is located between the left and right restricting walls 27, and the left and right restricting walls 27 are disposed to face each other with the engaging portion 47 interposed therebetween.

The lower portion of the pedal support member 23 is formed so that the plate width gradually becomes narrower as it goes downward (engagement portion 47), and the engagement portion 47 has protrusions 48 that protrude to the left and right sides.
At the rear of each of the left and right restricting walls 27, when the operation pedal 22 is swung in the second operation direction B, the second operation direction B is allowed to swing and the operation pedal 22 is in the first operation direction. A swing regulation guide portion 49 into which the engaging portion 47 is inserted is provided to restrict the swing of A.

The left and right swing regulation guide portions 49 are opposed to each other in the left-right direction.
The swing restricting guide portion 49 is configured by a vertically long hole (this is referred to as an engaging hole 49) formed through the restricting wall 27 in the thickness direction. The engaging hole 49 swings in a side view. It is formed so as to be displaced from directly under the support shaft 28 to the rear (in the first operation direction A and the one end side of the pivot 35).

The engagement hole 49 is formed at a position where the engagement portion 47 faces when the operation pedal 22 is positioned at the neutral position. When the operation pedal 22 is swung in the second operation direction B from the neutral position, the protruding portion 48 of the engaging portion 47 can be inserted into and removed from the engaging hole 49.
The operation pedal 22 is held at the neutral position by the neutral return spring of the attachment control valve and the swing control valve and is returned from the position operated in the first operation direction A or the second operation direction B to the neutral position.

  In the control device configured as described above, when the operation pedal 22 is stepped back and forth from the neutral position (when the central step portion 41a of the front pedal 41 is stepped on or the rear pedal 42 is stepped), the swing bracket 25 and the pedal support member 23 rotates around the axis X of the first boss portion 29, and the first interlocking link 33 is pushed and pulled. When the first interlocking link 33 is pushed and pulled, the bell crank 34 rotates and the attachment control valve Is operated.

At this time, the mounting plate 36 to which the second interlocking link 37 is coupled swings integrally with the pedal support member 23 about the axis X of the first boss portion 29, but the mounting plate 36 is the axis of the first boss portion 29. Even if the second interlocking link 37 swings around the center X, the swing control valve is not operated because the second interlocking link 37 only swings around the ball joint 37b on the other end side.
Further, when the pedal support member 23 swings around the axis X of the first boss portion 29, the engagement portion 47 (projection portion 48) is displaced from the engagement hole 49, so that the pedal support member 23 becomes the second boss portion. Even if it is about to swing left and right around the axis Y of 31, the left and right swinging of the pedal support member 23 is restricted by the engaging portion 47 (projecting portion 48) coming into contact with the opposing surface of the regulating wall 27. (The swing operation of the operation pedal 22 in the second operation direction B is restricted).

  Further, when the operation pedal 22 is stepped left and right from the neutral position (when the left and right step portions 41b of the front pedal 41 are stepped), the pedal support member 23 rotates around the axis Y of the second boss portion 31 with respect to the swing bracket 25. And the second interlocking link 37 is pushed and pulled. When the second interlocking link 37 is pushed and pulled, the first relay lever 38 and the second relay lever 39 are rotated to turn the swing control valve. Operated.

At this time, since the swing bracket 25 does not swing around the axis X of the first boss portion 29, the attachment control valve is not operated.
Further, when the pedal support member 23 swings left and right around the axis Y of the second boss portion 31 from the neutral position of the operation pedal 22, the protruding portion 48 of the engaging portion 47 is inserted into the engaging hole 49, thereby When the second boss portion 31 of the pedal support member 23 is allowed to swing left and right around the axis Y, and the protrusion 48 of the engagement portion 47 is inserted into the engagement hole 49, the pedal support member 23 is moved to the first boss. Even if an attempt is made to swing back and forth about the axis X of the portion 29, the protrusion 48 of the engaging portion 47 engages (contacts) with the front and back of the inner surface of the engaging hole 49, thereby The swing is restricted (the swing operation of the operation pedal 22 in the first operation direction A is restricted).

The front and rear surfaces of the engagement hole 49 are restriction surfaces that restrict the back and forth swing of the operation pedal 22 by restricting the back and forth swing of the engagement portion 47.
In this embodiment, when the operation pedal 22 swings in the first operation direction A, the swing of the operation pedal 22 in the second operation direction B is restricted and the operation pedal 22 swings in the second operation direction B. When moving, the restricting means for restricting the swing of the operation pedal 22 in the first operation direction A is composed of the left and right restricting walls 27, the engaging portion 47, and the engaging hole 49, The restricting means is provided between the support member 24 and the support member 23 (disposed on the lower side of the pivot 35).

Therefore, according to the restricting means provided between the pedal support member 23 and the support member 24, the folding operation of the operation pedal 22 as in the related art is not required, and the simultaneous operation of the operation pedal 22 in two directions is restricted. Can be convenient.
Further, since the operation pedal 22 can be swung left and right or back and forth from the neutral position without the operation of releasing the swing restriction of the operation pedal 22, the swing operation of the swing bracket 11, the operation of the hydraulic attachment, Workability is good when working frequently.

In addition, since it has a simple structure, it can be provided at low cost.
The control device of the present embodiment includes a pedal cover 51 that disables operation of the operation pedal 22 when the operation pedal 22 is not used.
The pedal cover 51 is formed in an L shape by a plate material, and is supported by a support plate 52 provided in front of the second boss portion 31.

The support plate 52 is erected on the support plate 26, and a fixed cylinder 53 having an axis in the second operation direction B is fixed to the upper end of the support plate 52, and the movable cylinders 54 are concentric on the left and right sides of the fixed cylinder 53. The support shaft 55 is inserted through the fixed cylinder 53 and the movable cylinder 54.
The left and right sides of one end side (base end side) of the pedal cover 51 are fixed to the movable cylinder 54, whereby the pedal cover 51 can swing back and forth around the axis of the fixed cylinder 53. Is moved back and forth, so that the pedal cover 51 is retracted to the front side of the operation pedal 22 as shown in FIG. 1, and the cover position is superimposed on the operation pedal 22 as shown in FIG. The position can be changed freely.

The pedal cover 51 is formed with a notched portion 56 for preventing interference with the folded rear pedal 42 and the front portion of the central step portion 41a of the front pedal 41 from the proximal end side toward the distal end side at the cover position. Has been.
Further, on the base end side of the pedal cover 51, a restriction plate 57 that is located below the front pedal 41 at the cover position and restricts the movement of the front pedal 41 in the depression direction is provided.

A contact member 58 that restricts the swing of the pedal cover 51 from the retracted position to the front side is provided on the upper front surface of the support plate 52.
9 and 10 show the control device of the second embodiment.
The difference between the control device of this embodiment and the control device of the first embodiment will be described.
The engagement hole 49 is formed immediately below the swing support shaft 28 in a side view, and the engagement portion 47 is directly below the first boss portion 29 and the second boss portion 31 when the operation pedal 22 is in the neutral position. Is located.

The pedal support member 23 includes a main member 59 that is rotatably supported by the second boss portion 31, and a sub member 60 that is fixed to the lower portion of the main member 59.
The lower end side of the main member 59 is bent toward the front side, and the sub member 60 is extended to the front side from the vertical plate portion 60a fixed to the lower rear surface of the main member 59, and the lower end of the vertical plate portion 60a. It is formed in an L shape from the horizontal plate portion 60b fixed to the lower end of the main member 59.

The engaging portion 47 is formed separately from the pedal support member 23, and is fixed to the front end of the horizontal plate portion 60 b of the sub member 60.
The lever portion 32 of the swing bracket 25 is located on the front side of the first boss portion 29 and is integrally formed with the arm portion 30.
Other configurations are similar to those of the control device of the first embodiment.

  In the control device of the second embodiment, since the engagement hole 49 is directly below the axis X of the first boss portion 29, the operation pedal 22 is swung in the second operation direction B. The rattling in the first operating direction A of the engaging portion 47 in the engaging hole 49 (the gap between the engaging portion 47 and the front and rear surfaces in the engaging hole 49) can be small, but the pedal support member 23 The lower end side of the main member 59 is bent, and the shapes of the sub member 60, the arm portion 30 of the swing bracket 25, and the lever portion 32 are complicated.

On the other hand, in the steering device of the first embodiment, the engagement hole 49 is displaced from the position immediately below the swing support shaft 28 in the second operation direction B and to one end side of the pivot 35. Since the shapes of the pedal support member 23, the arm portion 30 of the swing bracket 25, and the lever portion 32 are simple, they can be manufactured at low cost.
FIGS. 11-19 has shown the control apparatus of 3rd Embodiment.

Hereinafter, the steering apparatus according to the third embodiment will be described with the same names and symbols assigned to members / structures having the same functions as those of the steering apparatus according to the first and second embodiments.
The support member 24 that supports the swing bracket 25 and the like is mainly composed of a base plate 61 and a vertical plate 62 erected on the base plate 61, and the upper surface (stepping plate) of the swivel base 8 on the front side of the driver seat 10. ) Is arranged on the lower side of the step 63.

The base plate 61 is disposed such that the plate surface faces up and down, and is attached and fixed to the bottom of the swivel base 8 with bolts or the like.
The vertical plate 62 is disposed so that the plate surface faces left and right, and a lower end of the vertical plate 62 is fixed to the left side of the base plate 61. The vertical plate 62 is integrally extended rightward from the front end of the support wall 64. A front wall 65 and a rear lower wall 66 integrally extending rightward from a lower rear end of the support wall 64 are provided.

The upper end of the support wall 64 is located near the lower surface of the step 63, and the front wall 65 is provided from the upper end to the lower end of the support wall 64.
A first outer mounting portion 67 extending rearward from the rear end of the support wall 64 and bent to the left side at the rear end side is integrally formed on the rear side of the support wall 64 above the rear lower wall 66. Is formed.

Further, a second outer mounting portion 68 is fixed between the first outer mounting portion 67 and the rear lower wall 66 of the support wall 64. The second outer mounting portion 68 is formed by bending a plate material so that the front plate surface is along the front-rear direction and the rear plate surface is moved rearward as it goes rightward. The side is fixed to the left side surface of the support wall 64.
An upper side of the upper portion of the support wall 64 above the first outer mounting portion 67 is formed so that the front-rear width is narrower than the lower portion of the support wall 64.

A pair of regulating walls 27 are provided on the rear side of the upper portion of the support wall 64. These regulating walls 27 are arranged on the right side of the support wall 64 and are arranged to face each other with a gap in the first operation direction A (front-rear direction).
In the third embodiment, the pair of restricting walls 27 restrict the back and forth swinging of the engaging portion 47 at the opposing surface 27a while allowing the engaging portion 47 disposed between the restricting walls 27 to swing left and right. (That is, the restriction wall 27 allows the operation pedal 22 to swing in the second operation direction B (left-right swing) and swings the operation pedal 22 in the first operation direction A). The operation (back and forth swing) is regulated).

The left and right ends of the front and rear restricting walls 27 are fixed to the right side surface of the support wall 64, and the right end side of the front and rear restricting walls 27 is formed by an arc-shaped connecting wall 69 that protrudes rightward in plan view. It is connected.
In the present embodiment, the front and rear regulating walls 27 and the connecting wall 69 are integrally formed by bending a single plate material.

Further, the upper surface of each regulating wall 27 is inclined so as to move upward as it goes from the left end to the right, and the lower surface of each regulating wall 27 is substantially horizontal along the left-right direction. Therefore, each regulation wall 27 is formed so that the vertical width gradually becomes wider from the left end to the right.
A swing restriction guide portion 49 is provided in the middle in the left-right direction of the front and rear restriction walls 27. Therefore, the height of the upper surface of the right regulation wall 27 of the rocking regulation guide portion 49 is higher than the height of the upper surface of the rocking regulation guide portion 49 on the left side.

  In the third embodiment, the swing restriction guide portion 49 is inserted into the engagement portion 47 when the operation pedal 22 is swung in the first operation direction A from the neutral position. 47 is allowed to swing left and right of the engaging portion 47 (that is, the swing restriction guide portion 49 allows the operation pedal 22 to swing in the first operation direction A, and The swing operation of the operation pedal 22 in the second operation direction B is restricted).

Further, in the third embodiment, the left and right swing regulation guide portions 49 are opposed in the front-rear direction, and are vertically long grooves that are penetrating in the thickness direction of the regulation wall 27 and open upward. (This is referred to as an engaging groove 49).
A surface 49a facing the engaging groove 49 in the left-right direction is a flat surface along the vertical direction, and a bottom surface 49b is a flat surface along the left-right direction.

A surface 49 a that faces the engaging groove 49 in the left-right direction is a restricting surface 49 a that restricts left-right swinging of the engaging portion 47 (restricts left-right swinging of the operation pedal 22).
As shown in FIGS. 14 and 15, a swing support shaft 28 is provided on the upper left side of the front regulation wall 27.
The swing support shaft 28 is formed in a cylindrical shape having a left and right axis, and a left side portion thereof penetrates the support wall 64 of the support member 24 and is fixed to the support wall 64.

The swing support shaft 28 is disposed on the left side of the engagement groove 49 and is provided so that the rear side of the right side portion thereof overlaps the front regulation wall 27 in plan view.
Further, the swing support shaft 28 is disposed close to the restriction wall 27, and the lower end of the swing support shaft 28 is located below the upper surface of the restriction wall 27 on the right side of the engagement groove 49.
The swing bracket 25 is fixed to the left side of the support wall 64 with a vertically long first plate 71 disposed so that the plate surface faces left and right, and to the right and left middle portions of the first plate 71 so as to protrude rightward. From the shaft member 72, a second plate 73 provided in a right projecting manner at the front portion of the upper portion of the first plate 71, and a cylindrical member 74 provided in a rear projecting manner on the right side of the second plate 73 It is configured.

The upper portion of the first plate 71 is disposed so as to extend upward from the support wall 64, and extends upward from the step 63 through an opening formed in the step 63.
The midway portion of the first plate 71 is inclined so that the front end of the midway portion moves downward as it goes downward, and is gradually narrowed as it goes downward.

The second plate 73 is located in the vicinity of the upper side of the step 63 and protrudes rightward from the first plate 71 so as to cross the upper side of the support wall 64.
The shaft member 72 has an axis X in the left-right direction, and is inserted into and supported by the swing support shaft 28 so as to be rotatable around the axis X. Thus, the swing bracket 25 is supported by the swing support shaft 28 so as to be swingable about the axis X in the left-right direction (in the first operation direction A).

The cylindrical member 74 of the swing bracket 25 is located above the right end portion of the swing support shaft 28 and above the step 63 and has a longitudinal axis Y. Further, the axial center Y of the cylindrical member 74 is shifted from the upper position of the engagement groove 49 to the left side.
A pivot shaft 35 fixed to the upper portion of the pedal support member 23 so as to protrude forward is inserted into the cylindrical member 74 from behind, and is supported rotatably about the axis Y. Accordingly, the pedal support member 23 is supported by the swing bracket 25 so as to be swingable about the axial center Y in the front-rear direction (in the second operation direction B).

The pedal support member 23 is formed of a plate material that is long in the vertical direction, and the upper portion 23a is disposed so that the plate surface faces front and rear, and is positioned above the central portion between the regulation walls 27, and the pedal support member The lower end side of the upper portion 23 a of the 23 is inserted below the step 63.
The lower portion 23b of the pedal support member 23 is disposed such that the plate surface faces front and rear, and is positioned below the step 63 and behind the rear regulating wall 27.

Moreover, the middle part 23c of the up-down direction of the pedal support member 23 is formed in an inclined shape that moves rearward and obliquely downward from the lower end of the upper part 23a toward the upper end of the lower part 23b.
Further, the pedal support member 23 is disposed at a position shifted to the left from the position where the engagement groove 49 is formed.
A support cylinder 43 having a lateral axis is fixed to the upper end of the pedal support member 23 (above the pivot 35), and the operation pedal 22 is supported on the support cylinder 43. Since the structure of the operation pedal 22 is substantially the same as that of the first embodiment, the same members are denoted by the same reference numerals and the description thereof is omitted.

In the third embodiment, an anti-slip 75 is attached to the upper surface of the front pedal 41.
One end side of an inner cable of an operation cable (not shown) made of a push-pull cable or the like is pivotally connected to the lower end side of the first plate 71 of the swing bracket 25, and one end side of the outer cable of the operation cable is The first outer attachment portion 67 is attached.

Further, the other end side of the inner cable of this operation cable is linked to the spool of the attachment control valve, and when the operation pedal 22 is depressed from the neutral position to one side in the first operation direction A or the other side (front and back), The inner cable of the operation cable is pushed and pulled to operate the attachment control valve.
The support wall 64 is formed with a mounting hole 76 used when assembling one end side of the inner cable to the lower end side of the first plate 71.

A ball joint 77a on the left end side of the interlocking link 77 is connected to the lower portion 23b of the pedal support member 23 from the rear side.
On the other hand, a support bracket 78 is fixed to the front lower portion of the right side surface of the support wall 64. On the right side of the support bracket 78, a support shaft 79 having a vertical axis is erected. A relay cylinder 80 is externally fitted to and supported by the support shaft 79 so as to be rotatable about the axis. The relay cylinder 80 is disposed on the front side and on the right side of the front regulation wall 27.

In addition, a first relay lever 81 is provided on the upper portion of the relay cylinder 80 so as to protrude diagonally rightward so as to cross the right side of the restriction wall 27, and on the protruding end side of the first relay lever 81, A ball joint 77b on the right end side of the interlocking link 77 is connected from above.
In addition, a second relay lever 82 protrudes diagonally to the left and on the lower side of the relay cylinder 80.
One end side of the inner cable 83a of the operation cable 83 made of a push-pull cable or the like is pivotally connected to the protruding end side of the second relay lever 82, and one end side of the outer cable 83b of the operation cable 83 is It is attached to the outer attachment portion 68.

  Further, the other end side of the inner cable 83a of the operation cable 83 is linked to the spool of the swing control valve, and the operation pedal 22 is depressed from the neutral position to one side in the second operation direction B or the other side (left and right). Then, the interlock link 77 is pushed and pulled, and the inner cable 83a of the operation cable 83 is pushed and pulled through the first relay lever 81, the relay cylinder 80, and the second relay lever 82, and the swing control valve is operated.

An upper part in the axial direction of a cylindrical support bar 84 is fixed to the right side of the upper part 23 a of the pedal support member 23, and the lower part of the support bar 84 is inserted between the front and rear regulating walls 27.
An engaging portion 47 is provided below the support bar 84. Therefore, the engaging portion 47 is displaced from the position immediately below the axis Y of the pivot 35 to the right in a state where the operation pedal 22 is located at the neutral position.

In the present embodiment, the engaging portion 47 is composed of a pair of upper and lower cylindrical collars 85 (rotating members) supported by the support rod 84 so as to be rotatable about the axis. .
Each collar 85 is internally fitted with a cylindrical bush 86 (dry bearing such as a DU bush), and the collar 85 is externally fitted to the support rod 84 via the bush 86. It is configured to rotate smoothly.

A ixar clip 87 is provided above and below the engaging portion 47 of the support bar 84 to restrict the movement of the collar 85, and the support bar 84 is interposed between the upper collar 85 and the upper ixer clip 87. An externally fitted rubber hammer 88 is provided.
The upper and lower collars 85 are positioned between the front and rear engagement grooves 49 when the operation pedal 22 is in the neutral position (when the swing control valve and the attachment control valve are in the neutral state) (front and rear). ), And swinging the operation pedal 22 forward and backward is controlled by swinging the operation pedal 22 left and right from the neutral position while moving between the control walls 27 left and right. Then, by swinging the operation pedal 22 back and forth from the neutral position, the operation pedal 22 is inserted into the engagement groove 49 to restrict the left and right swing of the operation pedal 22.

  As described above, when the engaging portion 47 moves between the pair of opposed regulating walls 27, the swinging of the operating pedal 22 is permitted while the other swinging is restricted. When the operation pedal 22 is inserted into a swing regulation guide portion 49 formed on the regulation wall 27 so as to restrict the other swing of the operation pedal 22, the operation pedal 22 is In order to move smoothly, clearances S1 and S2 must be provided between the engaging portion 47 and the opposing surface 27a of the restricting wall 27 and between the engaging portion 47 and the restricting surface 49a of the swing restricting guide portion 49. However, if the gaps S1 and S2 are increased, it becomes difficult to regulate the operation pedal 22.

In the above-described embodiment, the engagement portion 47 is formed by the rotating collar 85, so that the collar 85 rotates even when the collar 85 contacts the opposing surface 27 a of the restriction wall 27 or the restriction surface 49 a of the engagement groove 49. The contact resistance is small because it moves.
Therefore, by forming the engaging portion 47 with a rotating member such as the collar 85, the clearance S1 between the engaging portion 47 and the restriction wall 27 and the restriction of the engaging portion 47 and the swing restriction guide portion 49 are controlled. It is possible to provide a control device that can make the gap S2 between the surface 49a as small as possible and smooth the movement of the operation pedal 22 while providing a sufficient swing control function of the operation pedal 22.

In addition, since the engaging portion 47 is formed of a rotating member, the engaging portion 47 does not get caught on the regulation wall 27 when the operating pedal 22 is stepped on. In addition, the resistance is extremely small and the operability is good.
Further, in the present embodiment, the interlock mechanism that interlocks and links the operation pedal 22 and the attachment control valve to the interlock mechanism that interlocks and links the operation pedal 22 and the swing control valve is free of play (the operation pedal 22 The range in which the operation does not affect the operation of the control valve spool is small. Therefore, when operating the swing control valve with the operation pedal 22 (when operating the operation pedal 22 in the second operation direction B), the operation control must be strictly controlled so that the attachment control valve is not operated with the operation pedal 22. I must.

Therefore, in the third embodiment, as shown in FIG. 19, the gap S1 between the facing surface 27a of the front and rear regulating walls 27 and the collar 85 is defined between the regulating surface 49a of the engaging groove 49 and the collar 85. Gap S2 (the minimum gap between the collar 85 and the regulating surface 49a of the engagement groove 49 when the collar 85 is inserted into the engagement groove 49).
The engaging portion 47 may be constituted by a single collar 85. However, when the upper and lower ones of the engaging portion 47 constituted by the single collar 85 are in contact with the regulating wall 27, etc. Although it is conceivable that the engaging portion 47 does not rotate relatively smoothly due to a difference in rotational resistance, in the third embodiment, the engaging portion 47 is constituted by a pair of upper and lower collars 85, and the engaging portion 47 is engaged. Since the upper part and the lower part of the part 47 are rotated separately, even if the upper and lower sides of the engaging part 47 hit each other, they smoothly rotate.

Further, the engaging portion 47 may be constituted by three or more collars 85 (rotating members) in the vertical direction.
Further, as shown in FIG. 16, since the engaging portion 47 is displaced rightward from directly below the axis Y of the pivot 35 in a state where the operation pedal 22 is located at the neutral position, from the neutral position. When the operating pedal 22 is swung to the left around the pivot 35, the engaging portion 47 swings to the right, and when the operating pedal 22 is swung to the right around the pivot 35 from the neutral position, the engaging portion. 47 swings to the left and falls. Correspondingly, the height of the regulation wall 27 is lower on the left side than the right side of the swing regulation guide portion 49.

The swing support shaft 28 is disposed on the left side of the swing restriction guide portion 49 and above the restriction wall 27, and the swing support shaft 28 is disposed on the left side of the restriction wall 27 (the side on which the restriction wall 27 is lowered). By disposing in the vicinity of the upper surface, the support mechanism for the operation pedal 22 can be made compact.
On the other hand, as shown in FIG. 17, since the engaging portion 47 is displaced rearward from the axis X of the swing support shaft 28, the operation pedal 22 is moved forward from the neutral position around the swing support shaft 28. When the swinging operation is performed, the engaging portion 47 swings rearward and rises, and when the operation pedal 22 is operated to swing rearward around the swinging support shaft 28 from the neutral position, the engaging portion 47 swings forward. Go up. Therefore, the bottom surface 49b of the rear engagement groove 49 is higher than the bottom surface 49b of the front engagement groove 49 (the groove depth of the front engagement groove 49 is the groove depth of the rear engagement groove 49). It ’s deeper than that.)

Further, since the lower part between the pair of restriction walls 27 is open, there is no possibility that dirt, dust, or the like accumulates between the restriction walls 27 and makes the movement of the operation pedal 22 worse.
Further, in the third embodiment, the bottom portion of the swivel base 8 with the swing bracket 25, the pedal support member 23, the operation pedal 22, the relay cylinder 80, the interlocking link 77, and the like assembled to the support member 24. Can be bolted to.

Note that various design changes can be made in the present embodiment, for example, the first operation direction A is the left-right direction (or an inclination direction inclined with respect to the left-right direction), and the second operation direction B is front-rear (or front-rear direction). (The inclination direction inclined with respect to).
In the present embodiment, the operation pedal is exemplified as the operation member 22 that can be operated in the two directions of the first operation direction A and the second operation direction B. However, the operation member 22 may be an operation lever or the like. Good.

Further, in the first and second embodiments, the rocking restriction guide portion 49 constituted by the groove and the engagement portion constituted by at least one turning member that rotates by contacting the restriction wall 27. 47 may be adopted.
Further, the operation directions A and B of the operation pedal 22 in the third embodiment may be an oblique direction inclined with respect to the front-rear and left-right directions as in the first and second embodiments.

  Further, the orientation of the restricting portion 27 (restricting wall) and the swing restricting guide portion 49 (engagement hole, engagement groove) may be changed as appropriate.

22 Operation Pedal 23 Pedal Support Member 24 Support Member 25 Swing Bracket 27 Restriction Part (Regulation Wall)
28 Swing support shaft 29 First boss portion 30 Arm portion 35 Pivot 47 Engagement portion 49 Swing regulation guide portion (engagement hole, engagement groove)
64 support wall 71 first plate 73 second plate 74 cylinder member 84 support rod 85 rotating member (color)
A 1st operation direction B 2nd operation direction X Axis center of the 1st boss part Y Axis center of the 2nd boss part

Claims (9)

The support member (24) is provided with a swing bracket (25) swingably supported in the first operation direction (A), and the swing bracket (25) is swingable in the second operation direction (B). A support member (23) that is supported is provided, and an operation member (22) is provided on the support member (23) so that the operation member (22) is moved in the first operation direction (A) and the second operation direction (B ) In a steering device that can be swung in two directions,
When the operating member (22) swings in the first operating direction (A), the operating member (22) is restricted from swinging in the second operating direction (B) and the operating member (22) is When swinging in the two operation directions (B), the support member (24) and the support member (23) are used as the restricting means for restricting the swing of the operation member (22) in the first operation direction (A). A control device provided between the two.   Above the swing support shaft (28) for swingably supporting the swing bracket (25), the support member (23) is swingable to the swing bracket (25) via a pivot (35). The operating member (22) is provided above the pivot (35) above the support member (23), and the restricting means is disposed below the pivot (35). The control device according to claim 1, wherein: The restricting means includes an engaging portion (47) provided on the support member (23) and swinging integrally with the support member (23).
The engaging portion (24) is provided on the support member (24) when the operating member (22) is swung in one of the first operating direction (A) and the second operating direction (B). 47) a restricting portion for restricting the swing of the operation member (22) in the other operation direction by restricting the movement in the other operation direction of the first operation direction (A) or the second operation direction (B). 27) and
It is formed in the restricting portion (27), and when the operating member (22) is operated to swing in the other operating direction, the operating member (22) is allowed to swing in the other operating direction and the one of the operating members (22). The control device according to claim 1, wherein the control device includes a swing restriction guide portion (49) into which the engagement portion (47) is inserted to restrict swing in the operation direction.   A pair of the restricting portions (27) are provided opposite to each other in the other operation direction so as to sandwich the engaging portion (47), and a swing restricting guide portion (49) is formed in each restricting portion (27). The control device according to claim 3, wherein   The engaging portion (47) is at least one rotating member that rotates by contacting the restricting portion (27) or the swing restricting guide portion (49) when the operating member (22) is swung. The control device according to claim 3 or 4, wherein the control device is configured by (85). The pair of restricting portions (27) are opposed to each other in the second operation direction (B), and a swing support shaft (28) having an axis in the second operation direction (B) is provided between the restricting portions (27). Provided,
The swing bracket (25) includes a first boss portion (29) externally fitted to the swing support shaft (28) so as to be rotatable about an axis thereof, and an upper side from the first boss portion (29). An extending arm part (30) and an axis (Y) fixed to the upper end side of the arm part (30) and parallel to an axis perpendicular to the axis (X) of the first boss part (29) And a second boss part (31) having
The support member (23) is vertically moved from the pivot (35) to one end side of the pivot (35) supported so as to be rotatable about the axis by the second boss portion (31) of the swing bracket (25). It ’s an extension,
An operation member (22) is provided on the upper end side of the support member (23), and the lower end side of the support member (23) is inserted between the restricting portions (27), and the engagement member is disposed on the lower end side of the support member (23). 6. The control device according to claim 4, further comprising a joint portion (47).   The swing regulation guide portion (49) is formed by being displaced from the position immediately below the swing support shaft (28) in the first operation direction (A) and the one end side of the pivot shaft (35). The control device according to claim 6. The pair of restricting portions (27) are opposed to each other in the first operation direction (A), and one end side in the second operation direction (B) is fixed to a support wall (64) provided on the support member (24). ,
The support wall (64) is provided with a swing support shaft (28) having an axis in the second operation direction (B) and positioned above the restricting portion (27),
The swing bracket (25) is supported by the swing support shaft (28) so as to be rotatable about its axis and extends upward from the swing support shaft (28). A second plate (73) provided on the upper portion of the first plate (71), and arranged on the upper side of the swing support shaft (28) and fixed to the second plate (73). A cylindrical member (74) having an axis (Y) in one operation direction (A),
The support member (23) is fixed to a pivot (35) supported so as to be rotatable about an axis on a cylindrical member (74) of the swing bracket (25),
The support member (23) is provided with an operation member (22) disposed above the pivot (35) and a support rod (84) having a lower portion inserted between the restricting portions (27). 84. The control device according to claim 4 or 5, wherein the engaging portion (47) is provided at a lower portion of 84). The engagement portion (47) is displaced in the second operation direction (B) from directly below the pivot (35) in a state where the operation member (22) is positioned at the neutral position.
The engaging portion (47) swings upward in the second operation direction (B) by swinging the operation member (22) from the neutral position in one of the second operation directions (B), The operation member (22) is configured to swing in one of the second operation directions (B) by swinging from the neutral position to the other of the second operation directions (B).
The height of the restricting portion (27) is such that the side where the engaging portion (47) swings from the neutral position to the other side is high and the side where the engaging portion (47) swings from the neutral position to the one side is low. Forming,
The control device according to claim 8, wherein the swing support shaft (28) is arranged above the lower side of the restricting portion (27) and in the vicinity of the upper end of the restricting portion (27).

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