JP2008007965A - Construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of components for all the types of machine by achieving the commonality of components for a spare pedal and components for a foot rest among the plurality of types of machine. <P>SOLUTION: A hydraulic excavator 1 is designed as the type of machine which can be equipped not only with standard equipment composed of the bucket 32 etc. but also with pieces of equipment other than the standard equipment. When the hydraulic excavator 1 is equipped with a grapple 5 as the equipment other than the standard equipment, the grapple 5 is operated by means of the spare pedal 18 with front and rear pedals 19 and 20. Since the spare pedal 18 is not needed for the hydraulic excavator 31 on the basis of specifications which require the mounting of the standard equipment alone, a pedal stopper 34 is provided in place of the rear pedal 20; and the foot rest 33 comprises the pedal stopper 34 and the front pedal 19. This enables the front pedal 19 etc. to be used as common components between the hydraulic excavators 1 and 31 different in specifications from each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a construction machine that is suitably used as a hydraulic excavator, for example, and includes a spare pedal for operating additional equipment other than standard equipment.

  In general, a construction machine such as a hydraulic excavator is equipped with a working tool such as a bucket as a standard equipment. However, depending on the work content, various equipment such as a grapple and a breaker may be replaced with a bucket. May be worn.

  In addition, hydraulic excavator models that are designed to be equipped with equipment other than the standard equipment (additional equipment) are provided with a spare pedal for operating the equipment when the additional equipment is installed (for example, , See Patent Document 1).

JP 2005-293494 A

  A hydraulic excavator according to this type of prior art includes a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and a working device that is provided on the upper revolving body so as to be able to move up and down. It is roughly constituted by. The upper swing body includes a swing frame as a vehicle body frame, an operator seat provided on the swing frame, and various operation levers provided on the swing frame located in front of the operator seat. ing.

  Further, a spare pedal is provided on the side of the operation lever at the foot of the operator seat. For example, when a device having an actuator other than the standard equipment such as a grapple or a breaker is used, the actuator of the device is operated by a spare pedal.

  On the other hand, as another prior art, there is also known a hydraulic excavator in which a lever stand is erected on the front side of an operator seat and a spare pedal is provided on the lower side of the lever stand (see, for example, Patent Document 2).

JP 2005-344435 A

  In this case, a rotating shaft that protrudes laterally from the lever stand is provided on the lower side of the lever stand, and a spare pedal including a front pedal and a rear pedal is provided on the protruding end side of the rotating shaft. ing. And an operator is the structure which operates an additional apparatus according to the rotation angle by stepping on a reserve pedal and rotating operation of a rotating shaft.

  By the way, in the prior art mentioned above, it is set as the structure which provides a reserve pedal with respect to the model which can also mount additional apparatuses other than standard equipment among each model of a hydraulic shovel. In this case, for example, a model in which the mounted device is limited to only the standard equipment does not require a spare pedal.

  However, for example, in the production line of hydraulic excavators, when considering the number of parts handled by these models as a whole, there is a reserve between models that are applicable only to standard equipment and models that are applicable to other equipment. There is a demand to make parts related to pedals as common as possible.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide parts related to a spare pedal between a model that can be equipped with only standard equipment and a model that can also be equipped with additional equipment. It is an object of the present invention to provide a construction machine that can be shared, reduce the number of parts handled by all of these models, and improve productivity.

  In order to solve the above-described problems, the present invention provides a vehicle body frame, an operator seat provided on the vehicle body frame, a lever stand that is positioned on the front side of the operator seat and is provided on the vehicle body frame and has an operation lever. A rotating shaft that is located at the foot of the operator seat and is rotated when an additional device other than the standard equipment is mounted on the lever stand, and the rotating shaft for operating the additional device. It is applied to a construction machine provided with a reserve pedal composed of a front pedal and a rear pedal.

  A feature of the configuration adopted by the invention of claim 1 is that a pedal stopper for restricting the rotational movement of the front pedal in a state in which the rear pedal is removed when the additional device is not mounted on the rotational shaft. And the pedal stopper is used as a footrest together with the front pedal.

  According to a second aspect of the present invention, the lever stand is provided with a support protrusion that causes the rear pedal to be brought into contact with the front pedal when the rear pedal is temporarily used as a footrest. When a pedal stopper is used, the pedal stopper is locked to the support protrusion.

  According to a third aspect of the present invention, the lever stand is provided with a support protrusion that causes the rear pedal to be brought into contact with the front side when the rear pedal is temporarily used as a footrest. A fixing tool that fixes the stopper to the rotating shaft and a locking portion that is locked to the support protrusion are provided.

  According to the first aspect of the present invention, for example, a model of a construction machine in which not only standard equipment but also additional equipment can be mounted can be provided with a spare pedal having a front pedal and a rear pedal. And when an additional apparatus is mounted in such a model, the said apparatus can be operated with a reserve pedal. On the other hand, when no additional device is mounted (for example, a model in which the mounted device is limited to the standard equipment), a spare pedal is not necessary, and a pedal stopper can be provided instead of the pedal. Then, the rotation operation of the front pedal can be restricted by the pedal stopper, and the front pedal and the pedal stopper can be used as a footrest in this state.

  Thus, in a model that does not require a spare pedal, the footrest can be easily realized by using the front pedal or the like simply by replacing the rear pedal with a pedal stopper. For this reason, even between models having different specifications, for example, a rotating pedal, a front pedal, etc. can be used as common parts, and a spare pedal part and a footrest part can be used in common. Therefore, the number of parts as a whole model can be reduced, and productivity can be improved.

According to the invention of claim 2, for example, in a model equipped with equipment other than the standard equipment, when the equipment is not used temporarily, the rear pedal is turned to the front around the rotation shaft and tilted. This allows the rear pedal to abut the support projection on the upper side of the front pedal. Thereby, even if the operator puts his foot on the rear pedal, the rotational displacement of the rear pedal can be restricted by the support protrusion, and the rear pedal can be used as a temporary footrest.
On the other hand, when a pedal stopper is used instead of the rear pedal, the pedal stopper can be locked to the support protrusion while being attached to the rotating shaft. Accordingly, the pedal stopper can reliably restrict the pivoting displacement of the pivot shaft and the front pedal attached thereto by the support protrusion, and even when the operator puts his foot on the front pedal, The pedal can be stably held at a predetermined position.

  According to the invention of claim 3, the fixing tool can fix the pedal stopper to the rotation shaft, and can restrict relative rotation between the pedal stopper and the rotation shaft. In this state, the locking portion of the pedal stopper can be locked to the support protrusion, and the rotation operation of the rotation shaft and the front pedal can be reliably restricted by the pedal stopper and the support protrusion. Therefore, the footrest can be easily formed using the support projection for the reserve pedal.

  Hereinafter, as a construction machine according to an embodiment of the present invention, for example, a small hydraulic excavator called a mini excavator will be described as an example and described in detail with reference to the accompanying drawings.

  In the present embodiment, a hydraulic excavator having a specification that can also be equipped with additional equipment other than the standard equipment will be described with reference to FIGS. 1 to 10, and the grapple will be described as an example of the additional equipment. .

  In the figure, reference numeral 1 denotes a small hydraulic excavator. The hydraulic excavator 1 is mounted on a self-propelled lower traveling body 2 and on the lower traveling body 2, as shown in FIGS. The upper revolving body 3 that constitutes the vehicle body of the excavator 1 together with the lower traveling body 2 and the work device 4 provided on the front side of the upper revolving body 3 so as to be able to move up and down are roughly constituted.

  Here, the upper swing body 3 is roughly constituted by a swing frame 6 and a counterweight 7 which will be described later, and an engine 8, an exterior cover 9, an operator seat 10 and a lever stand 12 which are mounted on the swing frame 6. Yes.

  Further, as shown in FIG. 1, the work device 4 is attached to the front side of the swing frame 6 so as to be swingable leftward and rightward, and attached to the swing post 4A so as to be able to move up and down. The boom 4B, an arm 4C attached to the tip end side of the boom 4B so as to be able to move up and down, a grapple 5 which will be described later attached to the tip end side of the arm 4C, and the boom 4B upward and downward. A boom cylinder 4D that moves up and down, an arm cylinder 4E that rotates the arm 4C upward and downward, a work tool cylinder 4F that rotates the grapple 5, and a swing that swings the swing post 4A left and right It is roughly constituted by a cylinder (not shown).

  5 is a grapple as a work tool attached to the distal end side of the arm 4C. The grapple 5 is attached to the work device 4 in place of standard equipment such as a bucket 32 (see FIG. 11), for example. Additional equipment other than standard equipment is configured. The grapple 5 is roughly constituted by claw portions 5A and 5A that can be opened and closed with each other, and an open / close cylinder 5B that opens and closes these claw portions 5A. It moves between the two, or is loaded on a loading platform of a transport vehicle.

  On the other hand, 6 is a revolving frame as a vehicle body frame disposed on the lower side of the upper revolving structure 3, and the revolving frame 6 is formed by means such as casting and the weight of the working device 4 at the rear end. A counterweight 7 for balancing is integrally formed. An engine 8 that drives a hydraulic pump (not shown) mounted on the vehicle and an exterior cover 9 that covers the engine 8 are provided on the rear side of the turning frame 6.

  An operator seat 10 is provided on the revolving frame 6 and on which an operator of the excavator 1 sits. The operator seat 10 is attached to the upper surface of the exterior cover 9. Further, on the revolving frame 6, a floor plate 11 is provided at the operator's feet seated on the operator seat 10, that is, on the front side of the exterior cover 9, and a floor mat 11 </ b> A is provided on the floor plate 11.

  Reference numeral 12 denotes a lever stand that is positioned on the front side of the operator seat 10 and is erected on the revolving frame 6. The lever stand 12 includes a frame-shaped frame 12 A that is attached to the revolving frame 6 on the lower side, as shown in FIG. Have. A sleeve 12B is rotatably fixed to the lower side of the frame 12A.

  Further, on the upper side of the lever stand 12, the travel levers 13 and 13, which are manually operated when the vehicle is traveled, and the upper swing body 3 are swung on the lower travel body 2, or the boom cylinder 4D of the work device 4 is used. Working levers 14 and 14 that are manually operated when operating the arm cylinder 4E, the work tool cylinder 4F, and the like are provided.

  Further, as shown in FIG. 2, a later-described spare pedal 18, a swing pedal 22, and the like, which are operated by an operator, are provided on the lower side of the lever stand 12. It is arranged on the left and right sides.

  Further, a control valve 15 is provided inside the lever stand 12 as shown in FIGS. The control valve 15 includes various actuators (for example, a travel motor, a turning motor, a boom cylinder 4D of the work device 4, an arm cylinder 4E, a work tool cylinder 4F, a swing cylinder, an opening / closing cylinder 5B of the grapple 5) mounted on the vehicle. In contrast, the hydraulic oil discharged from the hydraulic pump is supplied and discharged.

  In this case, the control valve 15 includes a preliminary control valve that supplies and discharges hydraulic oil to and from the open / close cylinder 5B of the grapple 5 according to the operation content when the operator depresses the preliminary pedal 18. The control valve 15 supplies and discharges hydraulic oil to and from each actuator in accordance with the operation state of the operation levers (lever 13 and 14) and pedals 18 and 22 by the operator. Thus, the operator can drive the vehicle or turn the upper swing body 3 and perform a desired work using the work device 4.

  Reference numeral 16 denotes a rotating shaft that is rotatably provided on the lower side of the lever stand 12 in order to arrange the spare pedal 18. The rotating shaft 16 is an additional device other than the standard equipment (in this embodiment, a grapple). 5) (exemplified as 5) is operated to rotate.

  Here, as shown in FIGS. 4 and 5, the pivot shaft 16 is rotatably supported at the proximal end side by the sleeve 12 </ b> B of the lever stand 12, and the distal end side projects from the left side surface portion of the lever stand 12 to the side. The operator seat 10 is disposed at the foot. The rotating shaft 16 is connected to a preliminary control valve of the control valve 15 through a link mechanism (not shown) disposed in the lever stand 12.

  Then, the rotation shaft 16 rotates according to the amount by which the operator depresses the auxiliary pedal 18 and operates the auxiliary control valve according to the rotation angle. Thus, in the case of the present embodiment, hydraulic oil is supplied and discharged from the preliminary control valve to the opening / closing cylinder 5B of the grapple 5 in accordance with the operation amount of the preliminary pedal 18, and the operator can The part 5A can be opened and closed.

  Further, as shown in FIGS. 10 and 15, a screw hole 16 </ b> A for fixing a front pedal 19, which will be described later, and a screw hole 16 </ b> B for fixing a pedal stopper 34, which will be described later, are provided on the outer peripheral surface of the rotating shaft 16. Are drilled in the radial direction.

  Reference numeral 17 denotes a support protrusion protruding from the left side surface portion of the lever stand 12, and the support protrusion 17 is made of, for example, a cylindrical metal rod or the like, and is disposed on the front side of the rotating shaft 16. 8 and 9, when the use of the grapple 5 is temporarily stopped, for example, the support protrusion 17 abuts on the rear pedal 20 to be described later from the lower side, and makes the rear pedal 20 a temporary footrest. It supports the position.

  Further, in a model in which an additional device such as a grapple 5 is not mounted, such as another hydraulic excavator 31 described later, the locking portion 34C of the pedal stopper 34 is engaged with the support protrusion 17 as shown in FIGS. Stopped.

  Reference numeral 18 denotes a reserve pedal provided on the rotary shaft 16, and the reserve pedal 18 is constituted by a front pedal 19, a rear pedal 20, a mounting screw 21 and the like which will be described later. The spare pedal 18 is used when operating this additional device in a model in which the additional device other than the standard equipment can be mounted, such as the hydraulic excavator 1. In the present embodiment, the spare pedal 18 includes the grapple 5. Used for operation.

  Further, in the hydraulic excavator 1, for example, when the use of the grapple 5 is temporarily stopped, as shown in FIGS. 8 and 9, the rear pedal 20 is tilted forward and brought into contact with the support protrusion 17. The rear pedal 20 can be temporarily used as a footrest.

  Further, for example, in a model in which only the standard equipment such as the bucket 32 is mounted, such as another hydraulic excavator 31, a pedal stopper 34, which will be described later, is provided as a rotating shaft instead of the rear pedal 20, as shown in FIGS. 16 and the support protrusion 17 are attached. In this model, the front pedal 19 and the pedal stopper 34 are used as footrests.

  Reference numeral 19 denotes a front pedal that constitutes the front side of the spare pedal 18. The front pedal 19 includes a hydraulic excavator 1 that can be mounted with equipment other than the standard equipment, and a hydraulic pressure that is limited to the standard equipment. It is used as a common part with the excavator 31.

  6 and 10, the front pedal 19 has a cylindrical portion 19A fitted to the outer peripheral side of the rotating shaft 16, and a stepping projecting radially from the cylindrical portion 19A toward the front side of the vehicle. The plate 19B and an engagement piece 19C extending in the axial direction from the stepping plate 19B toward the rear pedal 20 and disposed along the outer peripheral surface of the cylindrical portion 20A of the rear pedal 20 are roughly configured. .

  Here, a screw insertion hole 19D for inserting a mounting screw 21 described later is formed in the cylindrical portion 19A in the radial direction. The front pedal 19 is attached to the rotating shaft 16 in a state in which the rotation is restricted by the mounting screw 21, and is configured to rotate together with the rotating shaft 16 when the operator steps on the stepping plate 19B. Yes. Further, as shown in FIG. 7, the engagement piece 19 </ b> C engages with the stepped portion 20 </ b> C in the rotational direction in a state where the rear pedal 20 is tilted rearward.

  Reference numeral 20 denotes a rear pedal that constitutes the rear side of the spare pedal 18, and the rear pedal 20 is used in the hydraulic excavator 1 having a specification capable of mounting equipment other than the standard equipment. The rear pedal 20 includes a cylinder portion 20A that is fitted to the outer peripheral side of the rotation shaft 16 in a rotatable state, and a stepping plate 20B that protrudes radially from the cylinder portion 20A toward the rear side of the vehicle. And a step portion 20C which is provided at one place on the outer peripheral side of the cylindrical portion 20A and which can be engaged and disengaged with respect to the engagement piece 19C of the front pedal 19.

  Here, the rear pedal 20 is rotated between the pedal position shown in FIG. 6 and the footrest position shown in FIG. 9 by being tilted forward and rearward about the rotation shaft 16. In this case, when the rear pedal 20 is in the pedal position, as shown in FIG. 7, the engagement piece 19C of the front pedal 19 and the stepped portion 20C of the rear pedal 20 are engaged with each other in the rotational direction. For this reason, when the operator depresses one of the stepping plates 19B and 20B, the entire spare pedal 18 is rotationally displaced together with the rotational shaft 16 forward or rearward.

  When the rear pedal 20 is tilted forward, as shown in FIG. 9, the rear pedal 20 comes into contact with the support protrusion 17 from above and is held at the footrest position. As a result, the rear pedal 20 is in a state where the stepping operation is restricted by the support protrusion 17 at a position overlapping the upper side of the front pedal 19, so that the rear pedal 20 can be used as a temporary footrest.

  Reference numeral 21 denotes a mounting screw for mounting the front pedal 19 to the outer peripheral side of the rotating shaft 16, and the mounting screw 21 is a screw hole 16A of the rotating shaft 16 via a screw insertion hole 19D of the front pedal 19, as shown in FIG. The rotation shaft 16 and the front pedal 19 are relatively prevented from rotating relative to each other.

  In FIG. 2 and the like, reference numeral 22 denotes a swing pedal provided on the right side surface of the lever stand 12 at the operator's foot, and the swing pedal 22 is depressed by the operator to move the swing post of the work device 4. 4A is swung left and right.

  Next, the operation of the hydraulic excavator 1 configured as described above will be described. First, the operator can drive the vehicle or turn the upper swing body 3 on the lower travel body 2 by operating the travel lever 13 and the work lever 14 while sitting on the operator seat 10 of the vehicle. In addition, the boom 4B, the arm 4C, and the grapple 5 of the working device 4 can be moved up and down (turned).

  Further, the operator can swing the work device 4 (swing post 4A) to the left or right side of the vehicle by depressing the swing pedal 22 on the right side of the foot. Can be used to work.

  Further, when the operator depresses the spare pedal 18 on the left side of the foot, the pivot shaft 16 is pivoted, and the pivoting operation is transmitted to the spare control valve of the control valve 15 via the link mechanism or the like. As a result, since the hydraulic oil corresponding to the pedal operation of the operator is supplied to and discharged from the opening / closing cylinder 5B of the grapple 5, the operator opens and closes the claw portion 5A of the grapple 5 with the spare pedal 18, For example, the waste material can be transported.

  On the other hand, for example, when the grapple 5 is not used temporarily, the rear pedal 20 can be used as a temporary footrest by tilting the rear pedal 20 forward to the footrest position and bringing it into contact with the support protrusion 17. When the operation of the grapple 5 is resumed, the spare pedal 18 can be caused to function by tilting the rear pedal 20 back to the pedal position.

  Next, with reference to FIGS. 11 to 15, a description will be given of a model of a hydraulic excavator on which only standard equipment such as a bucket can be mounted.

  In the figure, reference numeral 31 denotes a hydraulic excavator, and the hydraulic excavator 31 is constituted by a lower traveling body 2, an upper swing body 3, a work device 4 and the like in substantially the same manner as the hydraulic excavator 1 described above. A bucket 32 for performing excavation work such as earth and sand, for example, is attached to the front end side as a standard work tool.

  Here, the excavator 31 is designed in advance as a model in which, for example, the mounted equipment is limited to only the standard equipment, and for example, the preliminary control valve of the control valve 15 and the hydraulic system connected thereto are omitted. . Since the excavator 31 does not require the spare pedal 18, a footrest 33 described later is provided instead.

  Reference numeral 33 denotes a footrest provided on the left side surface of the lever stand 12 in place of the spare pedal 18, and the footrest 33 is used by an operator to put his / her foot on while driving. Here, as shown in FIGS. 12 and 13, the footrest 33 is constituted by a front pedal 19 which is a component of the reserve pedal 18 and a pedal stopper 34 which will be described later, and the pivot shaft 16 provided on the lever stand 12. And the support protrusion 17.

  Reference numeral 34 denotes a pedal stopper provided across the rotating shaft 16 and the support protrusion 17. The pedal stopper 34 cooperates with the support protrusion 17 in a model in which no additional device is mounted, such as a hydraulic excavator 31. Thus, the rotation operation of the rotation shaft 16 and the front pedal 19 is restricted. In this case, the pedal stopper 34 is also used as the footrest 33 together with the front pedal 19.

  Further, as shown in FIGS. 14 and 15, the pedal stopper 34 includes a cylindrical portion 34A fitted to the outer peripheral side of the rotating shaft 16 at the position where the rear pedal 20 is attached, and an outer peripheral side of the cylindrical portion 34A. And a flat plate-like extension plate 34B whose front end side extends obliquely upward from the cylindrical portion 34A toward the front side of the vehicle, and is bent in a substantially L shape downward from the right end of the front end of the extension plate 34B. It is comprised by the substantially cyclic | annular latching | locking part 34C.

  Here, a screw insertion hole 34D for inserting a fixing screw 35 described later is formed in the cylindrical portion 34A in the radial direction. The pedal stopper 34 is fixed to the rotating shaft 16 in a state where the cylinder portion 34 </ b> A restricts rotation by the fixing screw 35, and the locking portion 34 </ b> C is locked to the support protrusion 17. Is restricted.

  The extension plate 34B is a part on which an operator puts his / her foot, and is disposed in the vicinity of the stepping plate 19B of the front pedal 19, and is inclined obliquely in substantially the same manner as the stepping plate 19B. For this reason, the extension plate 34 </ b> B can sufficiently secure the area of the footrest 33 in cooperation with the stepping plate 19 </ b> B and can stably put the operator's feet on the footrest 33.

  On the other hand, as shown in FIG. 14, the locking portion 34 </ b> C is fitted and locked to the outer peripheral side of the support protrusion 17. Thereby, the pedal stopper 34 can reliably restrict the rotational displacement of the rotation shaft 16 and the front pedal 19 by the support protrusion 17, and even when the operator puts his / her foot on the front pedal 19, The front pedal 19 can be stably held at a predetermined position.

  Reference numeral 35 denotes a fixing screw as a fixture for fixing the pedal stopper 34 to the outer peripheral side of the rotating shaft 16, and the fixing screw 35 is connected to the rotating shaft via a screw insertion hole 34D of the pedal stopper 34 as shown in FIG. The screw shaft 16 is screwed into the 16 screw holes 16B to restrict relative rotation of the rotation shaft 16 and the pedal stopper 34.

  As described above, in the present embodiment, for example, the rotating shaft 16, the support protrusion 17, the front pedal 19, and the mounting screw between the hydraulic excavator 1 on which the spare pedal 18 is mounted and the hydraulic excavator 31 on which the footrest 33 is mounted. 21 etc. are used as common parts.

  Next, the operation of the hydraulic excavator 31 configured as described above will be described. First, the operator sits on the operator seat 10 of the vehicle and operates the traveling lever 13 and the operation lever 14 with the left foot on the footrest 33, thereby causing the vehicle to travel and the upper swing body 3 to turn. In addition, excavation work such as earth and sand can be performed while the boom 4B, the arm 4C, and the bucket 32 of the working device 4 are moved up and down (rotated).

  The operator can swing the working device 4 (swing post 4A) to the left or right side of the vehicle by depressing the swing pedal 22 on the right side of the foot, in the same manner as in the case of the hydraulic excavator 1. . At this time, the operator can perform various lever operations and pedal operations in a stable state by placing the left foot on the footrest 33.

  Thus, according to the present embodiment, for example, as in the case of the hydraulic excavator 1, not only the standard equipment such as the bucket 32 but also the additional equipment such as the grapple 5 can be mounted on the spare pedal 18 for operating the equipment. It is set as the structure which provides. Further, for example, a model such as a hydraulic excavator 31 that does not have additional equipment is provided with a pedal stopper 34 instead of the rear pedal 20.

  Thereby, for example, in a model equipped with the grapple 5 or the like, each claw portion 5A of the grapple 5 can be opened and closed by depressing the auxiliary pedal 18. Further, in this model, when the grapple 5 is not used temporarily, the rear pedal 20 can be tilted forward and brought into contact with the support protrusion 17, and in this state, the rear pedal 20 is temporarily used as a footrest. Can do.

  On the other hand, in the hydraulic excavator 31 that does not require the spare pedal 18, the rotation operation of the rotary shaft 16 and the front pedal 19 can be ensured by the pedal stopper 34 only by replacing the rear pedal 20 used in the hydraulic excavator 1 with the pedal stopper 34. The front pedal 19 and the pedal stopper 34 can be used as the footrest 33 in this state.

  Thereby, for example, the footrest 33 can be easily realized by using components such as the rotating shaft 16, the support protrusion 17, the front pedal 19, and the mounting screw 21 used for the spare pedal 18. As parts, the parts for the spare pedal 18 and the parts for the footrest 33 can be shared between the hydraulic excavators 1 and 31 having different specifications.

  Therefore, for example, in a production line that handles a plurality of models, the number of parts as a whole model can be reduced, and productivity can be improved. Further, even in a small construction machine such as the hydraulic excavator 31 where it is difficult to secure a footrest space for the operator between the operator seat 10 and the lever stand 12, the footrest 33 is utilized by utilizing the space for arranging the spare pedal 18. Can be easily installed.

  Since the pedal stopper 34 is provided with the locking portion 34C and the fixing screw 35, when the pedal stopper 34 is used instead of the rear pedal 20, the rotation of the cylindrical portion 34A is regulated by the fixing screw 35. In this state, the locking portion 34 </ b> C can be locked to the support protrusion 17.

  Thereby, the pedal stopper 34 can reliably restrict the rotational displacement of the rotation shaft 16 and the front pedal 19 by the support protrusion 17, and even when the operator puts his / her foot on the front pedal 19, The front pedal 19 can be stably held at a predetermined position. Accordingly, the pedal stopper 34 can be made to function by using the support protrusion 17 for the spare pedal 18, and the shape and structure of the pedal stopper 34 can be simplified.

  In the above-described embodiment, the grapple 5 has been described as an example of equipment other than the standard equipment mounted on the excavators 1 and 31. However, the present invention is not limited to the grapple 5 and is equipped with various working tools, equipment, devices, etc. as standard as long as the equipment has an actuator such as a breaker, tamper (vibrator), rock drill, etc. It can be used as other equipment.

  Furthermore, in the embodiment, the small hydraulic excavators 1 and 31 have been described as examples of the construction machine. However, the present invention is not limited to this, and for example, medium and large hydraulic excavators, hydraulic cranes, wheel loaders, loads It can be applied to various construction machines including rollers.

It is a front view which shows the hydraulic excavator by embodiment of this invention in the state which mounted | wore with the grapple. It is the top view which looked at the excavator of FIG. 1 from the upper side. It is a left view which shows the hydraulic excavator of FIG. 1 in the state which removed the working device. It is a perspective view which shows the flame | frame of a lever stand. It is a perspective view which expands and shows a reserve pedal in the operable state. It is a front view which shows the reserve pedal of FIG. It is sectional drawing which looked at the reserve pedal from the arrow VII-VII direction in FIG. It is a perspective view which shows the state which uses a reserve pedal as a temporary footrest. It is a front view which shows the reserve pedal of FIG. It is a disassembled perspective view shown in the state before assembling a front pedal, a rear pedal, a rotating shaft, etc. It is a front view which shows the hydraulic excavator by embodiment of this invention in the state which mounted | wore the bucket. It is a perspective view which shows the state which attaches a pedal stopper to a reserve pedal and uses it as a footrest. It is a front view which shows the front pedal and pedal stopper of FIG. It is sectional drawing which looked at the pedal stopper from the arrow XIV-XIV direction in FIG. It is a disassembled perspective view shown in the state before assembling a front pedal, a pedal stopper, a rotating shaft, etc.

Explanation of symbols

1,31 Hydraulic excavator (Construction machinery)
2 Lower traveling body 3 Upper turning body 4 Working device 5 Grapples (equipment other than standard device)
6 Turning frame (body frame)
10 Operator seat 12 Lever stand 13 Travel lever (operating lever)
14 Work lever (control lever)
16 Rotating shaft 17 Supporting protrusion 18 Spare pedal 19 Front pedal 20 Rear pedal 32 Bucket (standard equipment)
33 Footrest 34 Pedal stopper 34A Tube portion 34B Extension plate 34C Locking portion 35 Fixing screw (fixing tool)

Claims (3)

A vehicle body frame; an operator seat provided on the vehicle body frame; a lever stand that is positioned on the front side of the operator seat and is erected on the vehicle body frame; and an lever that is positioned at a foot of the operator seat A rotation shaft that is rotated when an additional device other than the standard equipment provided on the stand is mounted, and a front pedal and a rear pedal that are provided on the rotation shaft for operating the additional device. In construction machines with a spare pedal,
The pivot shaft is provided with a pedal stopper that regulates the pivoting motion of the front pedal with the rear pedal removed when the additional device is not mounted, and the pedal stopper is used as a footrest together with the front pedal. Construction machine characterized by the configuration used.   The lever stand is provided with a support protrusion for bringing the rear pedal forward and abuts when the rear pedal is used as a temporary footrest. When the pedal stopper is used instead of the rear pedal, the pedal stand The construction machine according to claim 1, wherein the construction machine is configured to lock a stopper to the support protrusion. When the rear pedal is temporarily used as a footrest, the lever stand is provided with a support protrusion that makes the rear pedal tilt forward and comes into contact, and the pedal stopper is fixed to fix the pedal stopper to the rotating shaft. The construction machine according to claim 1, further comprising a tool and a locking portion that is locked to the support protrusion.

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