JP4429976B2 - Loader operating device - Google Patents

Description

  The present invention relates to a loader operating device for operating a loader device mounted on a front portion of a vehicle body.

2. Description of the Related Art Conventionally, in a tractor equipped with a loader device such as a front loader at the front part of a vehicle body, a lever group such as a main transmission lever is provided on one side of a driver's seat, and the loader device is operated in front of the main transmission lever. A loader operating device is known. For example, according to the tractor disclosed in Patent Document 1, a mounting bracket is provided in a projecting manner toward the driver's seat at the front end of a rear wheel fender located on one side of the driver's seat, and is attached to the tip of the mounting bracket. A support cylinder having a cylinder axis in the vertical direction is provided, and a support rod bent into a square shape is inserted into the support cylinder so as to be freely adjustable, and a front loader control device (loader operation) is inserted at the tip of the support rod. Equipment).
Japanese Utility Model Publication No. 5-46677

However, in Patent Document 1, since the loader operating device is disposed on the support rod supported by the mounting bracket protruding from the rear wheel fender, the loader operating device is disposed between the rear wheel fender and the driver's seat. A shift operation portion formed by providing a plurality of shift levers cannot be provided integrally, which may reduce the comfort of the driving space.
Moreover, in the loader operating device of the above-mentioned Patent Document 1, it is necessary to rotate the support rod every time the driver gets on and off and move it from the space that is to be the boarding / exiting path.
Therefore, in view of the above problems, the present invention provides a loader operating device that can be deployed in the vicinity of the driver's seat and at a position that does not hinder the driver's getting on and off without reducing the comfort of the driving space. The purpose is to provide.

In order to achieve the above object, the present invention takes the following technical means.
That is, the technical means for solving the problems in the present invention includes a loader device that is detachable at the front of the tractor vehicle body, a driver seat at the rear upper portion, and rear wheel fenders provided on both sides of the driver seat. And a steering device is provided in front of the driver's seat, a step is laid between the steering device and the driver's seat, and one or more shift levers are provided between the driver's seat and one of the rear wheel fenders. A cassette-type loader operating device that is attached to a tractor provided with a speed change operation unit including a speed change guide for guiding the operation of the speed change lever and operates a control valve of the loader device;
A loader lever extending toward the upper side of the speed change guide to be gripped by the driver, a support body that swingably supports a base portion of the loader lever, and a device cover that covers the support body, The device cover is disposed in front of the speed change guide, behind the entrance / exit provided at the step end, and outside the leg rest position of the driver sitting on the driver's seat. And an inner side surface facing the step, an outer side surface facing the inner side surface of the one rear wheel fender, and a back portion facing the speed change guide.

According to this, the loader lever does not protrude between the driver's seat and the steering device, and the support body of the loader operating device and the device cover that covers the support body are in front of the speed change operation unit and the driver's getting on and off and seating. It is not located at a part that hinders the movement of the leg in the state of being. For this reason, the loader operating device does not prevent the driver from getting on and off.
Further, it is preferable that the back portion of the device cover has a shape that substantially conforms to the shape of the front surface of the speed change guide, and the device cover is coupled to the speed change guide with the back portion fitted to the front surface of the speed change guide. .

As a result, the loader operating device fits in front of the speed change guide and is integrally connected to the speed change operating portion.
Moreover, it is preferable that the outer side surface of the device cover is formed in a shape that substantially follows the upper part on the inner side of the one rear wheel fender.
According to this, the loader operating device is also accommodated integrally with the one rear wheel fender.
Moreover, it is preferable that the said support body has a connection part connected with the bracket supported by the said one rear-wheel fender side in the front part of the speed change operation part.

According to this, the support body is supported by the rear wheel fender via the bracket, and has sufficient resistance to the vibration of the vehicle body and the action of external force.
In addition, a main transmission lever is disposed in the upper front part of the shift operation unit so as to protrude upward, and in the middle part of the loader lever, a gripping part provided at the tip is positioned above the main transmission lever. It is preferable that a bent portion that bends toward is formed.
According to this, when the loader lever and the main transmission lever are arranged at positions close to each other, they do not interfere with each other's operation, and the main transmission lever and the loader lever are operated continuously. The operability of these levers can be improved.

The loader device includes a boom and a bucket pivotally supported by the boom so as to be able to perform a squeeze and dump operation. A bucket leveling control lever for turning on and off automatic horizontal control of the bucket is provided on the support. It is preferably supported so as to be swingable.
According to this, the bucket leveling control lever can be provided integrally with the loader operating device, and the number of parts can be reduced and the mounting process can be simplified.
In the loader operating device, it is preferable that a cabin surrounding the driver's seat, the steering device, and the speed change operating unit is detachably attached to a tractor disposed at the rear upper part of the tractor vehicle body.

  According to this, the loader operating device is deployed in a space in the cabin in front of the speed change operation unit and without interfering with the getting on and off of the driver's seat and the movement of the legs during work, The space in the cabin can be effectively used, and the comfort of the space can be improved.

  According to the loader operating device of the present invention, the comfort of the driving space is not lowered, and it can be deployed in the vicinity of the driver's seat and at a position that does not hinder the driver's getting on and off.

Hereinafter, embodiments of the present invention applied to a tractor 1 will be described with reference to the drawings.
As shown in FIG. 10, a tractor 1 embodying the present invention includes a tractor vehicle body 2, a loader device (front loader) 3 detachably arranged at the front portion of the tractor vehicle body 2, and a rear upper portion of the tractor vehicle body 2. It is composed of a deployed cabin 4.
The tractor body 2 is a two-shaft, four-wheel type, and includes a pair of left and right front wheels 5 and a pair of left and right rear wheels 6. The pair of left and right front wheels 5 are steered wheels and can be driven, and here are four-wheel drive tractors. However, two-wheel drive can also be achieved by cutting off power transmission to the front wheels 5.

The tractor vehicle body 2 has a configuration in which a transmission case 7 is connected to the rear part of the engine via a crack housing, and engine accessories such as the engine and the radiator are covered by a hood 8 that can be freely opened and closed. Yes.
The loader device 3 pivotally supports a boom 11 on the top of a pair of left and right masts 10 sandwiched between bonnets 8 so that the boom 11 can swing up and down, and a bucket 12 pivots on the tip of the pair of left and right booms 11 so as to swing up and down. It is configured to support. The pair of left and right masts 10 are fixedly mounted on mounting bases 13 fixed to the left and right sides of the tractor vehicle body 2, and the loader device 3 is detachably attached to the tractor vehicle body 2. Further, a boom cylinder 14 a is provided between the middle part of the mast 10 and the middle part of the boom 11, and the bucket 12 is swung up and down between the middle part of the boom 11 and the back surface of the bucket 12. A bucket cylinder 14b is provided.

These cylinders are constituted by hydraulic cylinders.
Further, a control valve 15 is provided on one of the pair of left and right masts 10 (right side in the present embodiment). The control valve 15 is connected to the boom cylinder 14a and the bucket cylinder 14b via a hydraulic hose, and is connected to a hydraulic pump (not shown) via the hydraulic hose, and pushes the spool provided in the housing. It is possible to supply pressure oil to the boom cylinder 14a and the bucket cylinder 14b alternatively or simultaneously by the pulling operation. The control valve 15 is connected to the wire interlocking means 16. The wire interlocking means 16 is formed of a push-pull wire, a Bowden wire, or the like, extends toward the cabin 4, and is connected to a loader operating device 17 provided inside the cabin 4.

The cabin 4 is supported on a support stand protruding from the mission case 7 via a mount rubber.
As shown in FIGS. 2 and 3, the cabin 4 has a cabin frame 20 as a skeleton, and the cabin frame 20 includes a pair of left and right front struts 21 provided at the front and a pair of left and right provided at the rear. The rear strut 22, the rear beam member 23 that connects the lower ends of the left and right rear struts 22, and the pair of left and right side beams that extend from the lower end side of each of the left and right rear struts 22 to the lower end of the front strut 21. A side beam member 24 and a roof beam member (not shown) for connecting the upper ends of the pair of left and right front columns 21 and the upper ends of the pair of left and right rear columns 22 are provided.

The pair of left and right side beam members 24 include a curved portion 24a that curves forward and upward so as to substantially follow the rear wheel 6, and a horizontal portion 24b that extends from the tip of the curved portion 24a to the lower end side of the front column 21. It is composed of Further, front beam members 25 extending toward the front struts 21 facing each other are connected to the lower ends of the pair of left and right front struts 21, respectively.
In addition, a plate-like front panel 26 is provided at the center in the left-right direction between the pair of left and right front struts 21 and slightly below in the up-down direction, and a front beam member 25 is provided at the lower side of the front panel 26. Are connected to each other.

Further, a rear wheel fender 27 that serves as a mudguard for the rear wheel 6 is connected to the curved portion 24 a of the side beam member 24, and the rear wheel fender 27 extends along the curved portion 24 a of the side beam member 24. And a curved portion 27a that covers the rear wheel 6 from the rear upper side to the front side, and a side wall portion 27b that is connected to the curved portion 27a and faces the inner side surface of the rear wheel 6.
Further, as shown in FIG. 6, the lower end of the front column 21, the front beam members 25, the side beam members 24, the front panel 26, and the rear wheel fender 27 are connected to a plate-like bottom plate 28. A seat plate 29 provided with a flat portion 29a stands and is provided at the rear.

As shown in FIGS. 2 and 4, the entrance E is defined between the front strut 21 and the rear strut 22 on the same side in the left-right direction, and the rear strut 22 is disposed between the front strut 21 and the rear strut 22. A door 30 pivotally supported by the column 22 is provided.
As shown in FIGS. 3 and 6, the interior of the cabin 4 is a driver's driving space, a driver's seat 31 disposed between the left and right rear wheel fenders 27 and above the seat plate 29, and the driving A shift operation unit 32 provided from the right side of the seat 31 to above the right rear wheel fender 27 and a steering device 33 provided in front of the driver seat 31 are provided. The steering device 33 is provided with a handle 34 at a position facing the driver's seat 31.

Further, as shown in FIG. 4, a step 35 covering the bottom plate 28 is laid between the driver seat 31 and the steering device 33, and the step 35 is arranged between the driver seat 31 and the steering device 33. It is connected to the seat plate 29 and the front panel 26 to cover the space between them, and is connected to the front beam member 25 and the rear wheel fender 27 to cover the space between them. It extends to the entrance / exit E.
As shown in FIG. 2, the driver seat 31 is provided on the flat portion 29 a of the seat plate 29 via the driver seat support 36, and is swingable toward the left and right entrances E.

  As shown in FIGS. 4 and 6, the speed change operation unit 32 is provided from the right side of the driver's seat 31 to above the right rear wheel fender 27, and has a main speed change lever 41 and a sub speed change lever at the front side. 42, a hand accelerator lever 43, and an auxiliary control lever 44, and the base side of these levers 41 to 44 is covered with a speed change guide 45. Further, the bases of these levers 41 to 44 are pivotally supported by a lever pivoting member 46 shown in FIG. 3 that is mounted and supported inside the rear wheel fender 27 while being housed in the speed change guide 45. In addition, a flat bracket 47 is disposed on the front portion of the lever pivot member 46 via an attachment 46a.

The shift operation unit 32 includes a PTO lever 48, a position lever 49, and a draft lever 50 at the rear, and the base side of these levers 48 to 50 is covered with the shift guide 45.
As shown in FIGS. 2, 4, and 6, the speed change guide 45 is formed in a cover shape that covers the right side of the driver's seat 31 from the front to the rear of the rear wheel fender 27, and the curved portion of the side beam member 24. A fender cover 51 that covers the curved portion 24a of the side member 24 and the rear wheel fender 27 along the curved portion 27a of the rear wheel fender 27, the main transmission lever 41, the auxiliary transmission lever 42, the hand accelerator lever 43, and the auxiliary A first lever guide 52 for guiding the operation of the control lever 44 and a second lever guide 53 for guiding the operations of the position lever 49 and the draft lever 50 are provided.

  Further, a switch part 54 is provided in an upward projecting manner between the outer side of the fender cover part 51 and the first lever guide part 52, and the fender cover part 51 and the first lever guide are provided via the switch part 54. The part 52 is connected. Further, at the rear of the first lever guide portion 52, it extends to the rear portion of the cabin 4 along the curved portion 27 a of the rear wheel fender 27, and toward the outside of the cabin 4 as it goes upward from below the cabin 4. An inclined wall portion 55 that is inclined is provided, and a PTO lever guide portion 56 that guides the PTO lever 49 is provided on the inclined wall portion 55 so as to protrude.

  In addition, a vertical wall portion 57 that extends toward the lower side of the cabin 4 and faces the driver seat 31 is connected to the edge portion of the first lever guide portion 52 and the inclined wall portion 55 on the driver seat side. The front portion of the vertical wall portion 57 extends outwardly of the cabin while being curved along the shape of the edge of the first lever guide portion 52 as shown in FIG. 2, and is connected to the fender cover portion 51 and the switch portion 54. ing. Further, as shown in FIG. 5, the rear portion of the vertical wall portion 57 is bent toward the outer side of the cabin 4 behind the first lever guide portion 52 and connected to the inclined wall portion 55, and from the rear of the cabin 4. It is connected to the second lever guide part 53 formed in a shape that curves toward the front of the cabin 4 as it goes forward.

  As shown in FIG. 4, the first lever guide portion 52 is formed in a convex arc shape protruding forward of the cabin 4. Here, the first lever guide portion 52 has the tip end of the edge portion 52 a at a position retracted from the tip end portion of the fender cover portion 51 by a distance L toward the rear of the cabin 4. The edge 52a extends outward from the cabin and is located above the fender cover 51 in a plan view and connected to the switch 54, and extends toward the driver's seat and slightly protrudes above the step 35. The first lever guide portion 52 is extended toward the rear of the cabin 4, whereby the first lever guide portion 52 is located on the cabin rear side with respect to the straight line P in the drawing connecting the rear end of the entrance E and the driver's seat 31 in plan view. Is located.

Further, as shown in FIG. 5, the lever pivot member 46 is positioned below the first lever guide portion 52, and the vertical wall portion 57 is disposed in front of the first lever guide portion 52 as shown in FIG. An openable and closable opening 58 is formed at a position facing the bracket 47 in the lower part.
Also, the straight line P shown in FIG. 4 can be regarded as the outermost edge of the leg rest position when the driver is seated on the driver's seat 31, whereby the first lever guide portion 52 can be used as the entrance E It is disposed behind the first lever guide portion 52 and above the rear wheel fender 27. In addition, a space S substantially along the side edge of step 35 is provided.

In the space S, a loader operating device 17 for operating the loader device 3 is provided.
The loader operating device 17 is a detachable cassette type, and as shown in FIG. 5, a loader lever 61, a support body 62 that swingably supports the loader lever 61, and a loader lever 61 An apparatus cover 63 that guides the operation and covers the support 62 is provided, and is connected to the control valve 15 via the wire interlocking means 16 as shown in FIG.

  As shown in FIGS. 7 to 9, the support body 62 includes a housing 64 housing a support mechanism for the loader lever 61 and a transmission mechanism for transmitting the operation of the loader lever 61 to the wire interlocking means 16, and the housing. And a support frame 65 that supports 64. The housing 64 is formed in a rectangular parallelepiped shape extending in the vertical direction, a loader lever 61 is provided so as to protrude upward from the upper end portion, and a connecting portion 64a for connecting the wire interlocking means 16 is provided at the lower end portion. Yes. The upper end portion of the housing 64 and the base end portion of the loader lever 61 are covered with a bellows body 66 that expands and contracts with the operation of the loader lever 61.

  The support frame 65 is formed by bending a sheet metal material, and includes a front plate portion 67 that faces the front surface of the housing 64, a side plate portion 68 that faces a side surface on the outer side of the cabin of the housing 64, and the housing 64. The housing 64 is housed in the support frame 65 with the front surface being in contact with the front plate portion 67 and the side surface being in contact with the side plate portion 68; It is inserted into a fastener 70 such as a bolt provided from the front plate portion 67 to the rear plate portion 69 and supported by the support frame 65. A bush inserted through the fastener 70 is interposed between the rear surface of the housing 64 and the rear plate portion 69 of the support frame 65.

Further, as shown in FIGS. 7 and 9, the rear plate portion 69 of the support frame 65 has a connecting portion 69a extending toward the driver's seat, and the connecting portion 69a is fastened with a bolt or the like. It is supported on the bracket 73 via the tool 71 and the bush 72. As a result, the support body 62 is supported by the rear wheel fender 27 via the bracket 73 and the lever pivot member 46.
Further, as shown in FIGS. 8 and 9, the support frame 65 has a drooping plate portion 74 extending from the lower edge of the front plate portion 67 toward the lower side of the cabin 4. A bucket leveling control lever 75 for turning on and off a bucket leveling device (not shown) is supported in a swingable manner.

The bucket leveling device controls the posture of the bucket 12 lifted upward by the boom 11 in order to carry the earth and sand scooped up by the bucket 12 without spilling, so that the rake mouth of the bucket 12 faces upward. And is connected to a bucket leveling control lever 75 via a push-pull cable 76.
The drooping plate portion 74 of the support frame 65 has a long hole 74a extending in the vertical direction in the middle in the vertical direction, and a protruding portion 74b disposed adjacent to the long hole 74a on the back side, and the bucket leveling In the state where the control lever 75 is inserted into the long hole 74a, the midway part is supported by the protruding part 74b so as to be swingable. A cable 76 a of the push-pull cable 76 is attached to the rear end portion of the bucket leveling control lever 75, and the outer cylinder body 76 b of the push-pull cable 76 has the tip of the drooping plate portion 74 at the rear of the cabin 4. It is supported by a bent portion 74c formed by bending at a substantially right angle.

As a result, the bucket leveling control lever 75 is disposed so as to protrude forward from the support frame 65 and can swing in the vertical direction. By pulling up the bucket leveling control lever 75, the bucket leveling device is turned off. The horizontal control mechanism does not work. On the other hand, by pulling down the bucket leveling control lever 75, the bucket leveling device is brought into an on state, whereby the posture of the bucket 12 during operation can be kept horizontal.
As shown in FIGS. 1 and 5, the device cover 63 is formed in a shape that covers the front surface and both sides of the support body 62, and has an upper surface provided with an opening 81 that exposes the upper portion of the support body 62 and the bellows body 66. A recess 82 substantially extending along the vertical wall portion 57 of the first lever guide portion 52 of the shift guide 45 and the side portion 83 that covers the support portion 62 from the side surface on the driver seat side to the front surface and the side surface on the cabin outer side. The back portion 84 is cut out in an arc shape, and is connected to the first lever guide portion 52 of the speed change guide 45 by fitting the back portion 84 to the vertical wall portion 57.

The upper surface portion 82 of the device cover 63 is formed in a low-inclined shape toward the driver's seat and has a convex arc shape toward the front of the cabin 4 as shown in FIG. The edge extends along the straight line P from the end on the driver's seat side toward the front and extends toward the outer side of the cabin while bending forward in a convex arc shape, and the speed change operation is performed on the outer side of the cabin. The fender covering part 51 of the part 32 extends rearward of the cabin 4 along the outer edge.
Further, the side surface portion 83 of the device cover 63 extends substantially vertically from the edge of the upper surface portion 82 of the cabin 4 toward the lower side of the cabin 4, and extends toward (in line with) the step 35 in plan view. The inner surface 83a includes a front surface 83b and an outer surface 83c that extend from the front end of the inner surface 83a outwardly of the cabin and substantially extend along the front upper portion of the inner surface of the fender cover 51 of the transmission guide 45. Further, a notch portion 83d for allowing the bucket leveling control lever 75 to pass through the front surface 83b of the side surface portion 83 at a position facing the elongated hole 74a of the hanging plate portion 74 of the support frame 65 has a lower end at the front surface 83b. It is formed in a state where it is connected to the lower edge.

The loader lever 61 has a gripping portion 61a at the tip, and a bent portion 61b that bends upward so that the gripping portion 61a is positioned above the main transmission lever 41 in the middle. By providing the bent portion 61b in the middle portion of the loader lever 61, the gripping portion 61a of the loader lever 61 goes around the operating range of the main transmission lever 41 and is positioned above the gripping portion 61a of the main transmission lever 41. Thus, in the main transmission lever 41 and the loader lever 61, one lever does not hinder the operation of the other lever.
As shown in FIG. 5, the loader operating device 17 is attached to the speed change operation portion 32 by first opening the opening 58 of the vertical wall portion 57 of the first lever guide portion 52 of the speed change guide 45 and passing through the opening 58. Thus, the bracket 47 and the support body 62 built in the transmission guide 45 are opposed to each other. Then, the rear plate portion 69 of the support frame 65 of the support body 62 is fixed to the bracket 47 via the bush 72, thereby attaching the support body 62 to the front portion of the transmission guide 45.

  Next, a device cover 63 that covers the support 62 is attached. At this time, as shown in FIGS. 4 and 6, the back portion 84 of the device cover 63 is fitted to the vertical wall portion 57 of the first lever guide portion 52 of the transmission guide 45 and the side surface portion 83 of the device cover 63 is fitted to the fender covering portion 51. By attaching the device cover 63 along the inner surface, the device cover 63 fits in the shift guide 45 and is connected well, whereby the support body 62 and the device cover 63 of the loader operating device 17 are connected to the space. It is housed in S and connected integrally with the speed change guide 45.

  Further, since the notch 83d formed on the front surface 83b of the side surface 83 of the device cover 63 is connected to the lower end edge of the front surface 83b, the notch 83d is disposed on the support body 62 from the lower end of the notch 83d. In this state, the bucket leveling control lever 75 can be fitted. Thus, the bucket leveling control lever 75 can be assembled to the support body 62 before the device cover 63 is mounted, and the bucket leveling control lever 75 can be easily installed on the support body 62. Further, when the loader operating device 17 is removed, the device cover 63 can be detached from the support body 62 without removing the bucket leveling control lever 75 from the support body 62, and the attachment / detachment work of the device cover 63 becomes simple. .

The device cover 63 is attached to and supported by the support body 62 via a fastener such as a bolt. However, the device cover 63 may be fixed to the transmission guide 45.
Then, by attaching the loader lever 61 to the support body 62, the loader operating device 17 is located in front of the speed change operating unit 32 and behind the entrance E provided at the end of the step 35 as shown in FIG. The driver seated in the driver's seat 31 is deployed at a position that is on the outer side of the leg rest position.
Here, as shown in FIGS. 2 and 4, the gripping portion 61a of the loader lever 61 is in front of the main transmission lever 41 in a plan view and above the main transmission lever 41 and the auxiliary transmission lever 42 in a front view. Although the loader lever 61 and the main transmission lever 41 are arranged at positions adjacent to each other, one lever does not interfere with the operation of the other lever.

According to the present embodiment, the loader operating device 17 is accommodated in a space S provided in front of the first lever guide portion 52 of the speed change guide 45 at the front upper portion of the rear wheel fender 27. The space S is provided above the rear wheel fender 27 without protruding above the step 35, and the loader operating device 17 is accommodated in the space S, so that the loader operating device 17 is placed at the entrance E The movement of the driver reciprocating between the driver's seat 31 and the movement of the driver's leg seated on the driver's seat 31 is not hindered.
In addition, the space S can be said to be a part that is difficult for the driver who is seated in the driver's seat 31 inside the cabin 4 to reach and is hidden from the driver's line of sight. The loader operating device 17 is provided in the space S. Thus, there is no risk that the operating space in the cabin 4 will be significantly narrowed compared to the case where the loader operating device 17 is not provided, and the comfort of the operating space is maintained even when the loader operating device 17 is provided. It will be done.

Moreover, the device cover 63 of the loader operating device 17 fits in the first lever guide portion 52 and the fender cover portion 51 of the speed change guide 45 and is well connected. For this reason, the loader operating device 17 is connected to the speed change operating portion 32 without a sense of incongruity, and the unity between the cassette type loader operating device 17 and the speed change operating portion 32 previously provided in the cabin 4 is improved. The comfort of the internal driving space is improved and the operability of the driver is improved.
In addition, as shown in FIG. 2, the grip 41 a of the main transmission lever 41 is arranged obliquely forward of the armrest and on the armrest so that the driver can operate with the elbow placed on the armrest 31 a of the driver seat 31. It is deployed at a low position. The loader operating device 17 is provided at a position where the grip 61a of the loader lever 61 is above the main transmission lever 41, so that the driver can also operate the loader lever 61 with the elbow resting on the armrest 31a. Thus, even when the operation of operating these two levers in succession is performed, the driver's fatigue is greatly reduced.

As mentioned above, although embodiment which implemented this invention to tractor 1 was explained in full detail, this invention is not limited to said embodiment. For example, the loader device 3 may be detachably attached to the front portion of the tractor vehicle body 2 and the loader operation device 17 may be disposed in the cabin 4 in a non-detachable manner in advance, but the loader operation device 17 is the same as the loader device 3. It is preferable that the loader operating device 17 and the loader device 3 are sold as a set. Of course, the loader operating device 17 and the loader device 3 can be sold separately.
Further, although the speed change guide 45 is integrally formed, it may be formed by connecting parts divided into a plurality of parts such as the fender cover 51, the first lever guide 52, and the second lever guide 53. it can. Further, the plurality of levers of the speed change operation unit 32 and the arrangement relationship between the plurality of levers and the loader lever 61 can be appropriately changed according to the actual situation of work and the shape of the speed change operation unit 32.

Moreover, the speed change operation part 32 can also be set as the structure arrange | positioned on the left side of the driver's seat 31, and can also be set as the structure which supported the door 30 to the front support | pillar 21 so that opening and closing was possible.
Further, although the present embodiment employs the tractor 1 having the cabin 4, the tractor is provided with a lops instead of the cabin 4 and provided with a speed change operation unit 32 between the driver's seat 31 and the rear wheel fender 27. Even if it is adopted, it has the same effect as this embodiment.

It is a perspective view which shows a loader operating device and its periphery. It is a front view which shows the right side of a cabin. It is a top view which shows the right side of a cabin in the state which does not attach a speed change guide. It is a top view which shows the right side of a cabin in the state which attached the speed change guide. It is a side view which decomposes | disassembles and shows a transmission guide and a loader operating device. It is a sectional side view which shows the cabin inside by the side of the speed change operation part. It is a top view of a loader operating device. It is a left view of a loader operating device. It is a front view of a loader operating device. It is a right view of a tractor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tractor 2 Tractor vehicle body 3 Loader device 4 Cabin 17 Loader operation device 31 Driver's seat 32 Shifting operation unit 33 Steering device 34 Handle 35 Step 41 Main transmission lever 45 Shifting guide 47 Bracket 61 Loader lever 61a Gripping portion 61b Bending portion 62 Support body 63 Device cover 64 Housing 65 Support frame 69 Rear plate portion 69a Connecting portion 75 Bucket leveling control lever 81 Opening portion 82 Top surface portion 83 Side surface portion 83a Inner side surface 83b Front surface 83c Outer side surface 84 Back portion E Entrance / exit S space

Claims (7)

A detachable loader device is provided at the front of the tractor vehicle body, a driver seat is provided at the rear upper part, a rear wheel fender is provided on both sides of the driver seat, and a steering device is provided in front of the driver seat. A step is laid between the device and the driver's seat, and a shift having one or more shift levers and a shift guide for guiding the operation of the shift lever between the driver's seat and the inside of one rear fender A cassette-type loader operating device that is attached to a tractor provided with an operating portion and operates a control valve of the loader device,
A loader lever extending toward the upper side of the speed change guide to be gripped by the driver, a support body that swingably supports a base portion of the loader lever, and a device cover that covers the support body, The device cover is disposed in front of the speed change guide, behind the entrance / exit provided at the step end, and outside the leg rest position of the driver sitting on the driver's seat. An inner surface facing the step, an outer surface facing the inner surface of the one rear wheel fender, and a back portion facing the speed change guide ,
The loader operating device according to claim 1, wherein an outer surface of the device cover is formed in a shape substantially along an upper front portion on the inner surface side of the one rear wheel fender . A detachable loader device is provided at the front of the tractor vehicle body, a driver seat is provided at the rear upper part, a rear wheel fender is provided on both sides of the driver seat, and a steering device is provided in front of the driver seat. A step is laid between the device and the driver's seat, and a shift having one or more shift levers and a shift guide for guiding the operation of the shift lever between the driver's seat and the inside of one rear fender A cassette-type loader operating device that is attached to a tractor provided with an operating portion and operates a control valve of the loader device,
A loader lever extending toward the upper side of the speed change guide to be gripped by the driver, a support body that swingably supports a base portion of the loader lever, and a device cover that covers the support body, The device cover is disposed in front of the speed change guide, behind the entrance / exit provided at the step end, and outside the leg rest position of the driver sitting on the driver's seat. An inner surface facing the step, an outer surface facing the inner surface of the one rear wheel fender, and a back portion facing the speed change guide,
The loader device includes a boom and a bucket pivotally supported by the boom so as to be able to perform a squeeze and dump operation. A bucket leveling control lever for turning on and off automatic horizontal control of the bucket swings on the support body. freely supported features and to Carlo over da operating device that is. The back portion of the device cover has a shape that substantially conforms to the shape of the front surface of the speed change guide, and the device cover is coupled to the speed change guide with the back portion fitted to the front surface of the speed change guide. The loader operation device according to claim 1 or 2.   The said support body has a connection part connected with the bracket supported by the said one rear-wheel fender side in the front part of the speed change operation part, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. The loader operating device according to the above.   A main transmission lever is disposed in an upwardly projecting manner at the front upper part of the transmission operation unit, and a gripping part provided at the tip is positioned above the main transmission lever in the middle part of the loader lever. The loader operating device according to any one of claims 1 to 4, wherein a bent portion that is bent is formed. The loader device includes a boom and a bucket pivotally supported by the boom so as to be able to perform a squeeze and dump operation. A bucket leveling control lever for turning on and off automatic horizontal control of the bucket swings on the support body. The loader operating device according to claim 1, wherein the loader operating device is supported freely.   7. A cab that surrounds the driver's seat, the steering device, and the speed change operation unit is detachably mounted on a tractor disposed at an upper rear portion of the tractor vehicle body. The loader operating device described.

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