JP2017214811A - Travel operation part of construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a travel operation part of construction machine capable of adjusting both of an attachment height and an attachment angle of traveling pedals with a simple structure at a low cost.SOLUTION: There is provided a travel operation part of a construction machine, in which a pair of right and left travel levers is provided while being raised from a floor part in an erected form on an operation part disposed on the floor to enable travel operation of each travel lever manually. To lower parts of the right and left levers, traveling pedals are attached respectively, and the respective traveling pedals are configured so that the attachment heights and the attachment angles with respect to the respective travel levers can be adjusted.SELECTED DRAWING: Figure 3

Description

  The present invention provides a traveling operation unit of a construction machine, more specifically, a traveling pedal is attached to a traveling lever, and a manual operation of the traveling lever and a traveling lever operation via a stepping operation of the traveling pedal can be selectively operated. In addition, the present invention relates to a traveling operation unit of a construction machine that can adjust both the mounting height and the mounting angle of the traveling pedal.

  Conventionally, as a traveling operation part of a construction machine, there are those disclosed in Patent Documents 1 and 2. That is, in Patent Documents 1 and 2, a pair of left and right traveling pedals constituting a part of the driving unit are arranged on the floor, and a traveling operation valve (pilot valve) is linked to each traveling pedal. The travel pedal can be operated by depressing each travel pedal, and the left and right travel levers are raised upright on each travel pedal and each travel lever is operated manually. A technique that enables traveling operation is also disclosed. Patent Document 1 discloses a traveling operation unit of a construction machine in which the mounting height of the traveling pedal can be adjusted according to the preference of the operator, while Patent Document 2 discloses the mounting angle of the traveling pedal. A traveling operation unit of a construction machine that can be adjusted according to an operator's preference is disclosed.

JP 2004-1116078 A JP 7-251650 A

  However, Patent Documents 1 and 2 have a problem in that although one of the mounting height and the mounting angle of the traveling pedal can be adjusted, both cannot be adjusted, so that it cannot be sufficiently adapted to the operator's preference. . Further, when Patent Document 1 and Patent Document 2 are combined so that both the mounting height and the mounting angle can be adjusted, there is a problem that the structure becomes complicated and large, resulting in high manufacturing costs.

  Accordingly, an object of the present invention is to provide a traveling operation unit of a construction machine that can adjust both the mounting height and the mounting angle of a traveling pedal with a simple structure and low cost.

The invention described in claim 1
A traveling operation unit of a construction machine that is provided with a pair of left and right traveling levers standing upright from the floor and provided on a driving unit disposed on the floor so that each traveling lever can be manually operated. And
A traveling pedal is attached to each of the lower portions of the left and right traveling levers, and each traveling pedal can be adjusted in height and angle of attachment to each traveling lever.

Invention of Claim 2 is invention of Claim 1, Comprising:
The base of the traveling pedal is provided with a mounting adjustment piece for adjusting the mounting height and mounting angle with respect to the traveling lever, and the traveling pedal is attached to the lower part of the traveling lever in a cantilever manner via the mounting adjustment piece. To do.

Invention of Claim 3 is invention of Claim 2, Comprising:
The mounting adjustment piece is formed with three or more mounting holes having different heights from the floor, and the two adjacent mounting holes are formed so that the angles of the imaginary straight lines passing through the center points thereof are different. on the other hand,
The travel lever is formed with two lever-side mounting holes that align with two adjacent mounting holes,
The two mounting holes and the two lever side mounting holes are aligned and fixed by a fixture.

Invention of Claim 4 is invention of Claim 3, Comprising:
Three or more mounting holes are in communication with each other through a communication slot,
The mounting height and the mounting angle of the travel pedal with respect to the travel lever can be adjusted by sliding the mounting adjustment piece through the communication elongated hole in a state where the fixing tool is loosened.

Invention of Claim 5 is invention of Claim 1, Comprising:
A lever side mounting adjustment piece for adjusting the mounting height and angle of the traveling pedal is provided at the lower part of the traveling lever, and the traveling pedal is attached in a cantilever manner through the lever side mounting adjustment piece. .

  According to the present invention, it is possible to provide a traveling operation unit of a construction machine that can adjust both the mounting height and the mounting angle of the traveling pedal with a simple structure and low cost.

The left view of the excavation work vehicle which concerns on this embodiment. The perspective view from the left front of the excavation work vehicle concerning this embodiment. The perspective explanatory view of the travel operation part as a 1st embodiment. Exploded perspective view of a travel operation unit as the first embodiment. The perspective explanatory view after adjustment of the run operation part as a 1st embodiment. Adjustment explanatory drawing of the traveling operation part as 1st Embodiment. Explanatory drawing of the 1st attachment attitude | position P1 and the 2nd attachment attitude | position P2. Side surface explanatory drawing of the traveling pedal as 1st Embodiment. The top view of the traveling pedal as 1st Embodiment. The bottom view of the traveling pedal as 1st Embodiment. The front view of the traveling pedal as 1st Embodiment. Explanatory drawing of the left side of the traveling operation part as 2nd Embodiment. Explanatory drawing of the left side of the traveling operation part as 3rd Embodiment. Explanatory drawing of the left side of the traveling operation part as 4th Embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. A shown in FIGS. 1 and 2 is an excavation work vehicle as a construction machine according to the present invention, and the excavation work vehicle A is equipped with a travel operation unit B in a driving unit 7 described later. The traveling operation unit B attaches the traveling pedals 50 and 51 to the lower portions of the traveling levers 90 and 91 in a detachable manner, and operates the traveling levers through manual operation of the traveling levers 90 and 91 and stepping operation of the traveling pedals 50 and 51. And can be selectively operated. In addition, when the travel pedals 50 and 51 are attached to the travel levers 90 and 91, both the mounting height and the mounting angle of the travel pedals 50 and 51 can be adjusted as appropriate according to the driver's body shape, preferences, and the like. It makes it easy to step on.

[Overview of overall excavation work vehicle]
As shown in FIGS. 1 and 2, the excavation work vehicle A includes a traveling vehicle body 1 capable of self-propelling, and an excavation unit 2 and a soil removal unit 3 as working units attached to the traveling vehicle body 1. . In this embodiment, the excavation bucket 13 is detachably attached as a work attachment to the distal end of the work section to form the excavation section 2. Various work can be performed by attaching a rock drilling device, a crushing device, or the like as a work attachment as appropriate to the tip of the working portion instead of the bucket 13.

  The traveling vehicle body 1 has a base 5 interposed between a pair of left and right crawler-type traveling parts 4, 4, and a swivel 6 can be swung freely on either side of the vertical axis about the vertical axis. It is installed. The swivel base 6 can be swung within a small turning radius of the left and right side widths of the traveling parts 4 and 4 (the distance between the outer edge of the left traveling part 4 and the outer edge of the right traveling part 4). It is formed in a disc shape to enable small turning work. On the swivel base 6, the operation part 7 is disposed on the floor part 30 formed in the left half of the swivel base 6, and the tank part 8 is disposed adjacent to the right side of the operation part 7. A prime mover unit 9 is disposed in the rear half of 6. A base end portion of the excavation portion 2 is pivotally attached to the center portion of the front end of the swivel base 6. The earth removal part 3 is attached to the base 5 between the pair of left and right traveling parts 4, 4. On the prime mover unit 9, a canopy 10 is erected, and the canopy 10 covers directly above the operation unit 7. Reference numeral 20 denotes a guard body interposed between the canopy 10 and the floor portion 30, and the guard body 20 protects a driver who drives the driving section 7 from scattered objects from the front.

  The excavation unit 2 includes a boom 11, an arm 12, a bucket 13, a swing cylinder (not shown) that rotates them, a boom cylinder 15, an arm cylinder 16, and a bucket cylinder 17.

  As shown in FIGS. 1 and 2, the earth removal part 3 can move up and down the base end part of the pair of left and right blade arms 26, 26 extending in the front-rear direction to the base 5 between the pair of left and right traveling parts 4. A blade (soil removal plate) 27 extending in the left-right direction is installed between the tip portions of the blade arms 26 and 26. The blade 27 is formed to have substantially the same width as the left and right side widths of the traveling portions 4 and 4. Reference numeral 28 denotes a blade cylinder.

  In the excavation work vehicle A configured as described above, the traveling unit 4 is operated by the driving unit 7 so that the vehicle can travel straight in the front-rear direction and turn in the left-right direction as appropriate. And the excavation work can be performed by operating the excavation part 2 with the operation part 7. In addition, by operating the soil removal unit 3 with the operation unit 7, the soil removal work can be performed.

(Description of the configuration of the driving unit)
As shown in FIGS. 1 and 2, the driving unit 7 is provided with a pair of left and right traveling levers 90, 91 standing upright at the front portion of the floor 30, and each traveling lever 90, 91 in the front-rear direction. The traveling vehicle body 1 can be operated by being tilted. A driver's seat 93 is placed on the rear of the floor 30 via a driver's seat support base 92. On the left and right sides of the driver's seat 93, left and right work operation levers 94 and 95 for operating the work parts (the excavation part 2 and the earth removal part 3) are disposed. An operation panel unit 96 is disposed on the right side of the right work operation lever 95.

  In the driving unit 7 configured as described above, a driver seated in the driver's seat 93 appropriately operates the travel levers 90 and 91 and the left and right work operation levers 94 and 95 while visually confirming the front, so that a desired one can be obtained. It is possible to work.

(Description of travel lever configuration)
As shown in FIGS. 3 and 4, the traveling levers 90 and 91 are pivotally connected at the lower ends 90e and 91e to the pivot support 31 disposed in the swivel base 6, and The left and right interlocking connecting parts 32 and 33 are interlocked and connected between the right traveling parts 4 and 4.

  The pivot connection portion 31 includes a pivot piece 34, a pivot 36 whose left end is supported by the pivot piece 34 and extended rightward, and a pair of left and right cylinders that are rotatably fitted to the pivot 36. The lever boss pieces 37, 38 and a pair of left and right operating arms 39, 40 suspended from the lever boss pieces 37, 38 are provided.

  Upper portions of the outer peripheral surfaces of the lever boss pieces 37 and 38 are integrally connected by welding lower portions of the lower end portions 90e and 91e of the traveling levers 90 and 91 bent at right angles to the left side. Front end portions of the left and right interlocking connecting portions 32 and 33 are connected to the operating arms 39 and 40, respectively. 41 and 42 are a pair of left and right lever boots formed in a bellows shape. Each lever boot 41, 42 covers on the floor 30 a lever through hole (not shown) formed in the floor 30 and a midway portion of each traveling lever 90, 91 penetrated into the lever through hole. doing. Reference numerals 43 and 44 denote mounting bolts for attaching the lever boots 41 and 42 to the floor portion 30.

  When the left (right) traveling lever 90 (91) thus configured is tilted forward as shown in FIG. 3, the traveling lever 90 (91) is pivotally connected. The lever boss piece 37 (38) is rotated in the b (h) direction, and the left (right) side interlocking connecting portion 32 (33) is moved via the operating arm 39 (40) suspended from the lever boss piece 37 (38). Pulling in the f (l) direction, the left (right) side traveling unit 4 (4) is driven forward.

  When the left (right) traveling lever 90 (91) is tilted backward as shown in FIG. 3, the lever boss piece 37 (which pivotally connects the traveling lever 90 (91)) ( 38) is rotated in the e (k) direction, and the left (right) side interlocking connecting portion 32 (33) is moved in the c (i) direction via the operating arm 39 (40) suspended from the lever boss piece 37 (38). The left (right) side traveling unit 4 (4) is driven backward.

  As shown in FIG. 3, the left (right) travel lever 90 (91) is tilted forward in the a (g) direction, and the right (left) travel lever 91 (90) is held in a neutral state. Then, the traveling vehicle body 1 is pivoted to the right (left) side.

  As shown in FIG. 3, the left (right) travel lever 90 (91) is tilted forward in the a (g) direction, and the right (left) travel lever 91 (90) is moved to j (d). When the vehicle is tilted backward in the direction, the traveling vehicle body 1 is spin-turned to the right (left) side.

[Description of Configuration of Traveling Operation Unit as First Embodiment]
Next, the configuration of the traveling operation unit B as the first embodiment will be described with reference to FIGS. As shown in FIGS. 3 to 5, the traveling operation unit B according to the first embodiment has traveling pedals 50 and 51 attached to the lower portions of the pair of left and right traveling levers 90 and 91 in a cantilever manner. As shown in FIG. 4, two first and second lever side mounting holes 90 a, 90 b, 91 a, 91 b that open in the left-right direction are provided at the lower part of the travel levers 90, 91. They are formed along the direction and at intervals in the vertical direction. The traveling pedals 50 and 51 are provided with a pair of inner and outer attachment adjusting pieces 58, 59, 60, and 61 for adjusting the attachment height and the attachment angle with respect to the traveling levers 90 and 91 at their base parts. Removably attached to lower portions of the travel levers 90 and 91 via 59, 60 and 61.

  As shown in FIG. 4, the attachment adjusting pieces 58, 59, 60, 61 have three or more (three in the first embodiment) first to third attachment holes having different heights from the floor 30. 72-83 are formed. Two of these adjacent mounting holes are formed so that the angles of the first and second virtual straight lines K1 and K2 passing through these center points are different, as shown in FIG. θ is an intersection angle formed between the first and second virtual straight lines K1 and K2 that intersect each other.

  On the other hand, the traveling levers 90 and 91 are formed with two first and second lever side mounting holes 90a, 90b, 91a and 91b which are aligned with the two adjacent mounting holes 72 to 83, respectively. The two first and second lever side mounting holes 90a, 90b, 91a, 91b are aligned with two adjacent mounting holes 72 to 83, and these two holes are aligned and communicated in the left-right direction. The first and second fixing bolts 97a, 97b, 98a, 98b as fixing tools are inserted and fixed from the outside. A female screw portion (not shown) is formed on the inner peripheral surface of the mounting holes 75 to 80 formed in the inner mounting adjustment pieces 59 and 60, and the first and second fixing bolts 97a, 97b, 98a, The tip end portion of 98b can be screwed.

  More specifically, as shown in FIGS. 8 to 11, the traveling pedals 50 and 51 include front pedal pieces 52 and 53, a pair of inner and outer reinforcing pieces 54, 55, 56 and 57, and inner and outer sides. A pair of attachment adjusting pieces 58, 59, 60, 61, pivot projecting pieces 62, 63, pivot and stopper pieces 66, 67, and rear pedal pieces 68, 69 are provided.

  The front pedal pieces 52 and 53 are formed in a plate shape whose surface is directed in the vertical direction. The front pedal pieces 52 and 53 are provided with extending pieces 70 and 71 which are formed so that the left and right widths are gradually widened at the outer edges thereof, thereby increasing the area on which the toe portion of the driver's foot is placed. Thus, the stepping operation by the toe portion can be performed steadily. Each extending piece 70, 71 is formed by raising its front end edge upward.

  The pair of inner and outer reinforcing pieces 54, 55, 56, 57 are attached to the lower surfaces of the front pedal pieces 52, 53 so as to extend in the front-rear direction to reinforce their rigidity.

  The pair of inner and outer mounting adjustment pieces 58, 59, 60, 61 have the front end portions of the reinforcing pieces 54, 55, 56, 57 directed upward from immediately before the front end edge portions of the front pedal pieces 52, 53. It is made to extend. Each of the mounting adjustment pieces 58, 59, 60, 61 is formed by extending the lower half portions 58a, 59a, 60a, 61a toward the front upper side, and the upper half portions 58b, 59b, 60b, 61b to the rear upper side. It is stretched and formed. That is, it is formed to be bent in a “<” shape when viewed from the left side.

  Each attachment adjusting piece 58, 59, 60, 61 has a plurality of attachment holes. In the first embodiment, the first half mounting holes 72, 75, 78, 81 are opened in the left-right direction in the lower half portions 58a, 59a, 60a, 61a, respectively. Further, in the upper half portions 58b, 59b, 60b, 61b, one second mounting hole 73, 76, 79, 82 is opened in alignment in the left-right direction, and one third mounting hole 74 is respectively provided. , 77, 80, 83 are aligned and opened in the left-right direction.

  As shown in FIGS. 6 and 7, the second mounting holes 73, 76, 79, 82 and the third mounting holes 74, 77, 80, 83 are in the axial direction of the upper half portions 58b, 59b, 60b, 61b. And an interval (center interval) H is formed in the vertical direction. The center spacing of the first mounting holes 72, 75, 78, 81 and the second mounting holes 73, 76, 79, 82, the second mounting holes 73, 76, 79, 82 and the third mounting holes 74, 77, 80, The center distance 83 is formed at the same distance H as the center distance between the two first and second lever side mounting holes 90a, 90b, 91a, 91b of the traveling levers 90, 91, respectively.

  The pivot support pieces 62 and 63 are formed by projecting the rear end portions of the inner reinforcing pieces 54 and 56 rearward from the rear end edge portions of the front pedal pieces 52 and 53.

  The pivot support / stopper pieces 66 and 67 are pivotally supported on the pivot support protrusions 62 and 63 via pivot support shafts 64 and 65 having an axis line in the left-right direction. The pivot support / stopper pieces 66 and 67 pivotally support the midway portion of the pivot support protrusions 62 and 63 via the pivot support shafts 64 and 65, respectively. Stopper surface portions 66a and 67a that are in contact with the surface from below are formed at the end portions.

  The rear pedal pieces 68 and 69 are formed in a plate shape whose surfaces are directed in the vertical direction, and are attached to the pivot support / stopper pieces 66 and 67. The rear pedal pieces 68 and 69 are formed by raising the rear edge portion, and are extended outward to form the extended pieces 84 and 85, thereby increasing the area on which the driver's foot is placed. By doing so, the stepping operation by the buttocks can be performed steadily.

  The rear pedal pieces 68 and 69 are rotated clockwise around the pivot shafts 64 and 65 in the left side view as shown in FIGS. The stopper surface portions 66a and 67a can be deployed at the rear end portion of the lower surface of 53 until they come into contact with the surface from below. On the other hand, by turning counterclockwise about the pivot shafts 64 and 65 in the left side view, the rear end edges of the rear pedal pieces 68 and 69 are raised upward on the front pedal pieces 52 and 53, respectively. It can be folded into a polymerized state until it abuts. That is, the traveling pedals 50 and 51 can be changed between an unfolded state in which the front-rear width is extended and a folded state (stored state) in which the front-rear width is shortened.

  In the first embodiment configured as described above, the first and second lever side mounting holes 90a, 90b, 91a, 91b are aligned with the first mounting holes 72 to 75 and the second mounting holes 76 to 79, so The first and second fixing bolts 97a, 97b, 98a, 98b are penetrated from the outside in the transverse direction in the holes aligned in the direction, and on the inner peripheral surface of each hole of the inner mounting adjustment pieces 58, 60. The traveling pedals 50 and 51 can be attached to the traveling levers 90 and 91 by screwing these tip ends to the formed female screw portions (first attachment posture P1). At this time, the traveling pedals 50 and 51 are attached to the traveling levers 90 and 91 in a relatively low position and in a substantially horizontal posture.

  Also, the second mounting holes 76-79 and the third mounting holes 80-83 are aligned with the first and second lever side mounting holes 90a, 90b, 91a, 91b, and in each hole aligned in the left-right direction, The first and second fixing bolts 97a, 97b, 98a, 98b are passed through from the outer side in a transverse state, and the tip ends of the female screw portions formed on the inner peripheral surface of each hole of the inner mounting adjustment pieces 58, 60 The travel pedals 50 and 51 can be attached to the travel levers 90 and 91 by screwing the portions (second mounting posture P2). At this time, the traveling pedals 50 and 51 are attached to the traveling levers 90 and 91 at a relatively high position and in a forward leaning posture of a front height and a low position.

  As described above, the driver selects one of the first mounting posture P1 and the second mounting posture P2 of the traveling pedals 50 and 51 according to his / her body shape and preference, thereby the traveling levers 90 and 91. The mounting height and mounting angle of the traveling pedals 50 and 51 can be adjusted. In the first embodiment, the three mounting holes are the first to third mounting holes. However, by appropriately increasing the number of mounting holes so that the mounting height and the mounting angle are different, the traveling pedal 50, It is also possible to increase the options for the 51 mounting postures.

  The driver selects either the first mounting posture P1 or the second mounting posture P2 and places the soles of the feet on the travel pedals 50 and 51 in the unfolded state. The travel levers 90 and 91 can be tilted in the a · g direction by performing the stepping operation. On the other hand, the travel levers 90 and 91 can be tilted in the d · j direction by stepping on the buttocks. That is, the travel levers 90 and 91 can be operated by depressing the travel pedals 50 and 51 with the feet without performing the tilting operation with the hand.

[Description of Configuration of Traveling Operation Unit as Second Embodiment]
Next, the configuration of the traveling operation unit B as the second embodiment will be described with reference to FIG. As shown in FIG. 12, the travel operation unit B of the second embodiment has the same basic structure as the travel operation unit B of the first embodiment described above. The configuration of the pair of attachment adjusting pieces 100, 100 to be formed is different. Since the left and right travel pedals 50 and 51 have the same symmetrical structure, only the configuration of the left travel pedal 50 will be described, and the description of the configuration of the right travel pedal 51 will be omitted. Moreover, a pair of attachment adjustment piece 100,100 demonstrates below only about one attachment adjustment piece 100. FIG.

  That is, the mounting adjustment piece 100 is formed by bending in a left-side-viewed “<” shape like the mounting adjustment pieces 58, 59, 60, 61 of the first embodiment, and has a slightly wider front-rear width. Forming. The attachment adjusting piece 100 has three or more attachment holes. In the second embodiment, the first and second mounting holes 103 and 104 and the third and fourth mounting holes 105 and 106 are respectively provided in the lower half 101 and the upper half 102 of the mounting adjustment piece 100. It is formed along the extending direction of the attachment adjusting piece 100 and spaced in the vertical direction. These first to fourth mounting holes 103 to 106 are in communication with each other via a communication long hole 107, and the first and second lever side mounting holes 90 a, 90 b, 91 a, 91 b and the first and second mounting holes are formed. The first and second fixing bolts and nuts 108 and 109, which are fixing tools, are inserted into the two mounting holes 103 and 104 or the third and fourth mounting holes 105 and 106 in a transverse penetrating manner to be fastened and fixed.

  When adjusting the mounting height and mounting angle of the travel pedal 50 with respect to the travel lever 90, the first and second fixing bolts and nuts 108 and 109 that are fastened and fixed are loosened, and the mounting adjustment piece is connected via the communication long hole 107. 100 is slid up and down. In the first and second mounting holes 103 and 104 or the third and fourth mounting holes 105 and 106 aligned with the first and second lever side mounting holes 90a, 90b, 91a and 91b, the first and second mounting holes 105 and 106 are provided. (2) Fixing bolts and nuts 108 and 109 are arranged in a transverse manner and are fastened and fixed. Thus, in the second embodiment, the mounting adjustment piece 100 can be slid in the vertical direction, and the mounting height and mounting angle of the travel pedals 50 and 51 with respect to the travel levers 90 and 91 can be easily adjusted. it can.

[Description of Configuration of Traveling Operation Unit as Third Embodiment]
Next, the configuration of the traveling operation unit B as the third embodiment will be described with reference to FIG. As shown in FIG. 13, the traveling operation unit B of the third embodiment has the same basic structure as the traveling operation unit B of the first embodiment described above, but at each lower portion of the traveling levers 90 and 91, Lever side mounting adjustment pieces 110, 110 for adjusting the mounting height and mounting angle of the traveling pedals 50, 51 are provided, and the traveling pedals 50, 51 are mounted in a cantilever manner via the lever side mounting adjustment pieces 110, 110. Is different. The left-side lever-side mounting adjustment pieces 110 and 110 will be described below only with respect to the left-side lever-side mounting adjustment pieces 110 and 110 provided on the left traveling lever 90.

  That is, the lever side mounting adjustment piece 110 includes a lower part of the traveling lever 90, a plate-like front bulging piece 111 that bulges forward from the lower part of the traveling lever 90, and a plate that bulges backward from the lower part of the traveling lever 90. And a rear bulge piece 112 having a shape. A lower portion of the traveling lever 90 is formed along the axial direction of the traveling lever 90 and with first and second central mounting holes 113 and 114 opened in the left-right direction with a space in the vertical direction.

  The front bulge piece 111 is formed with first and second front mounting holes 115 and 116 opened in the left-right direction with a space in the vertical direction. The rear bulge piece 112 is formed with first and second rear attachment holes 117 and 118 opened in the left-right direction with a space in the up-down direction. The vertical spacing between the holes is defined as the distance between the first mounting holes 72 and 75 formed in the mounting adjustment pieces 58 and 59 of the travel pedal 50 and the second mounting holes 73 and 76 and the second mounting holes 73 and 76 and the first mounting holes. 3 are formed at the same interval as the mounting holes 74 and 77.

  The first and second central mounting holes 113 and 114 are arranged so that a central virtual straight line K3 passing through the centers thereof is inclined backward and forward and rear. The first and second front mounting holes 115 and 116 are arranged so that the front imaginary straight line K4 passing through the center of the first and second front mounting holes 115 and 116 is inclined backward and front and rear high so that the front imaginary straight line K4 is largely inclined rearward from the central imaginary straight line K3. . The first and second rear attachment holes 117, 118 are arranged so that the rear virtual straight line K5 passing through the center of the first and second rear attachment holes 117, 118 has a forward inclined shape with a front height and a rear low.

  The traveling pedals 50 and 51 are provided in any of the first and second central mounting holes 113 and 114, the first and second front mounting holes 115 and 116, or the first and second rear mounting holes 117 and 118, respectively. The first mounting holes 72 to 75 and the second mounting holes 76 to 79 formed in the mounting adjustment pieces 58, 59, 60, and 61, or the second mounting holes 76 to 79 and the third mounting holes 80 to 83 are aligned. The first and second fixing bolts 97a, 97b, 98a, 98b are penetrated in a transverse state, and the female thread portions formed on the inner peripheral surfaces of the mounting holes 75-80 of the inner mounting adjustment pieces 59, 60 The traveling pedal 50 can be attached to the traveling lever 90 at a desired attachment height and attachment angle by screwing the front end portion thereof.

[Description of Configuration of Traveling Operation Unit as Fourth Embodiment]
Next, the configuration of the traveling operation unit B as the fourth embodiment will be described with reference to FIG. As shown in FIG. 14, the travel operation unit B of the fourth embodiment has the same basic structure as the travel operation unit B of the first embodiment described above. The configuration of the pair of attachment adjusting pieces 120, 120, 120, 120 to be formed is different. The pair of attachment adjustment pieces 120, 120, 120, 120 will be described below only with respect to the left pair of attachment adjustment pieces 120, 120 provided on the left traveling lever 90.

  That is, the pair of left and right mounting adjustment pieces 120, 120 has a substantially triangular plate shape in which the front-rear width of the lower end portion is formed wider and the front-rear width is gradually narrowed upward. The attachment adjusting pieces 120, 120 are formed by opening first attachment long holes 121, 121 having a circular arc shape in the front-rear direction in the lower end portion and opening in the left-right direction, and second attachment holes 122, 122 in the upper end portion (top portion). Are opened in the left-right direction. The first attachment long holes 121 and 121 are formed in a longitudinal arc shape along an arcuate imaginary line centering on the second attachment holes 122 and 122.

  In the lower part of the traveling lever 90, first to fourth lever side mounting holes 90a to 90d are formed in the left-right direction so as to be along the axis and spaced apart in the vertical direction.

  In the fourth embodiment configured as above, the first and third lever side mounting holes 90a and 90c are provided with the first mounting long holes 121 and 121 and the second mounting holes formed in the pair of mounting adjusting pieces 120 and 120, respectively. The first and second fixing bolts 97a, 97b, 98a, 98b are passed through the holes in the left-right direction by aligning the first and second fixing bolts 97a, 97b, 98a, 98b. The travel pedal 50 can be attached to the travel lever 90 at a relatively low position by screwing a nut (not shown). At this time, in a state where the first and second nuts are loosened, the traveling pedal 50 is swung back and forth through the first mounting elongated holes 121 and 121, and the first and second nuts are mounted at desired positions (mounting angles). By tightening the two nuts, the traveling pedal 50 can be attached to the traveling lever 90 at a relatively low position (relatively low mounting height) and in a desired mounting posture (mounting angle).

  The first and second lever-side mounting holes 90b and 90d are aligned with the first and second mounting holes 121 and 121 and the second mounting holes 122 and 122, respectively. The second fixing bolts 97a, 97b, 98a, 98b are passed through in the transverse state, and the first and second nuts are screwed to the tip portions of the second fixing bolts 97a, 97b, 98a, 98b. Can be attached. At this time, in a state where the first and second nuts are loosened, the traveling pedal 50 is swung back and forth through the first mounting elongated holes 121 and 121, and the first and second nuts are mounted at desired positions (mounting angles). By tightening the two nuts, the traveling pedal 50 can be attached to the traveling lever 90 at a relatively high position (relatively high attachment height) and in a desired attachment posture (attachment angle).

A excavation work vehicle B traveling operation unit 7 driving unit 30 floor unit 50 left traveling pedal 51 right traveling pedal 58 left inner mounting adjusting piece 59 left outer mounting adjusting piece 60 right inner mounting adjusting piece 61 right outer mounting adjusting piece 90 left Travel lever 91 Right travel lever

Claims (5)

A traveling operation unit of a construction machine that is provided with a pair of left and right traveling levers standing upright from the floor and provided on a driving unit disposed on the floor so that each traveling lever can be manually operated. And
A traveling operation unit for a construction machine, wherein a traveling pedal is attached to each of the lower portions of the left and right traveling levers, and each traveling pedal can be adjusted in height and angle of attachment to each traveling lever.   The base of the traveling pedal is provided with a mounting adjustment piece for adjusting the mounting height and mounting angle with respect to the traveling lever, and the traveling pedal is attached to the lower part of the traveling lever in a cantilever manner via the mounting adjustment piece. The traveling operation part of the construction machine according to claim 1. The mounting adjustment piece is formed with three or more mounting holes having different heights from the floor, and the two adjacent mounting holes are formed so that the angles of the imaginary straight lines passing through the center points thereof are different. on the other hand,
The travel lever is formed with two lever-side mounting holes that align with two adjacent mounting holes,
The traveling operation portion of a construction machine according to claim 2, wherein the two mounting holes and the two lever side mounting holes are aligned and fixed by a fixture. Three or more mounting holes are in communication with each other through a communication slot,
4. The mounting height and the mounting angle of the travel pedal with respect to the travel lever can be adjusted by sliding the mounting adjustment piece through the communication elongated hole in a state in which the fixture is loosened. Traveling operation part of construction machinery.   A lever side mounting adjustment piece for adjusting the mounting height and angle of the traveling pedal is provided at the lower part of the traveling lever, and the traveling pedal is attached in a cantilever manner through the lever side mounting adjustment piece. The traveling operation part of the construction machine according to claim 1.

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