JP4784585B2 - Construction equipment pedal equipment - Google Patents

Description

  The present invention relates to a pedal device in which two types of pedals that are stepped on a floor provided with a driver's seat are provided side by side in a construction machine such as a hydraulic excavator.

  The background art will be described by taking a small hydraulic excavator called a mini excavator as an example.

  In this hydraulic excavator, as shown in FIG. 8, an upper swing body 2 is rotatably mounted on a crawler type lower traveling body 1, and an operation including a boom 3, an arm 4, and a bucket 5 on the upper swing body 2. An attachment 6 is mounted and configured.

  The upper swing body 2 is provided with a driver's seat 7, and a lever that is operated by a hand as an operating device that commands each operation of running, turning, and work around the driver's seat 7, and a pedal that is operated by stepping. It is done.

  Here, as shown in FIG. 9, left and right traveling pedals 8 and 9 that command traveling and a swing pedal 10 that swings the work attachment 6 (boom 3) to the left and right are provided as front pedals. It is provided on the floor 11 (frontward as viewed from the driver's seat. The same applies to the front-rear and left-right directions described below) in an upwardly inclined posture.

  The travel pedals 8 and 9 are formed to be long in the front and back because they are stepped forward, and the swing pedal 10 is formed to be long in the left and right (short in the front and back) because it is stepped in the left and right directions.

  Note that the swing pedal 10 is used as an offset pedal in an offset excavator that offsets the boom 3 parallel to the left and right.

The general configuration of the above shovel is shown in Patent Document 1.
JP 2001-107395 A

  The traveling pedals 8 and 9 and the swing pedal 10 are arranged side by side with a clearance between them as shown in the figure. Specifically, the traveling pedals 8 and 9 are normally installed in the center of the floor in front of the driver's seat, and the swing pedal 10 is installed on the right side of the right traveling pedal 9.

  In this case, since devices other than the pedal are also installed on the floor 11 in front of the driver's seat, the space for the pedal cannot be made large, so that the clearance between the right traveling pedal 9 and the swing pedal 10 is limited. .

  For this reason, for example, as shown in FIG. 9, so-called “co-stepping” occurs in which the right foot F that steps on the right traveling pedal 9 simultaneously operates the swing pedal 10, and the swing (or offset) of the traveling and the work attachment 6 occurs. There was a risk that operations would occur simultaneously.

  In particular, the travel pedals 8 and 9 and the swing pedal 10 have different heights (the heights at the highest front end) of the respective tread surfaces 8a, 9a and 10a. In the state where the pedal is fully depressed, the lower-level swing pedal 10 is depressed. Therefore, if the acceleration operation is performed during traveling at a medium or high speed, a sudden swing operation is performed, and the degree of danger increases.

  In addition, in order to avoid this co-stepping as much as possible, the clearance between the pedals is tried to be as large as possible while being restricted, so that the layout of the pedal, particularly the swing pedal 10, has been difficult.

  Therefore, the present invention provides a pedal device for a construction machine that can prevent two types of pedals that are arranged side by side like a traveling and swinging pedal from being pressed together.

According to the first aspect of the present invention, two kinds of pedals to be stepped on are arranged side by side with a height difference on the floor where the driver's seat is provided, and both pedals have the same foot on the floor between the two pedals. A stopper is provided to prevent the simultaneous depression of the pedals that are simultaneously depressed by the pedal. It protrudes upward on the floor with a height dimension that is higher than the surface and does not protrude upward from a straight line connecting the ends on the closer sides of both tread surfaces .

According to a second aspect of the invention, in the configuration of claim 1, the stopper is out of both pedals there is a difference in the longitudinal dimension of the tread surface, on the side of the small pedal of longitudinal dimension, the longitudinal direction of the pedal It has approximately the same longitudinal length as the dimension in which is collision set on the floor.

The invention of claim 3, in the structure according to claim 1 or 2, the stopper is in an inclined position of up before having substantially the same angle and placed above both pedals in an inclined position of the front rising on the floor It is a projecting one.

According to a fourth aspect of the present invention, in the configuration of any one of the first to third aspects, a lock member is provided, and the lock member locks one of the pedals in an inoperable state on the floor between the pedals. and a locked position, but provided we are movable between the stopper position for preventing the stepping co both pedals as a stopper.

According to a fifth aspect of the present invention, in the configuration of the fourth aspect , a lock member is attached to the bracket fixed on the floor so as to be rotatable between a lock position and a stopper position about a horizontal axis in the front-rear direction. together, those and stop member for stopping the lock member in the both positions, the spring exerts a spring force in a direction to press the locking member to the locking member is al provided.

According to a sixth aspect of the present invention, in the configuration according to any one of the first to fifth aspects, the traveling pedal for traveling the lower traveling body and the swing pedal for swinging the work attachment attached to the upper swing body to the left and right are arranged side by side. in is arranged in the floor, but the stopper is al provided on the floor between the two pedals.

According to the present invention, in a construction machine in which two types of pedals (traveling pedal and swing pedal in claim 6 ) are arranged side by side on the floor provided with the driver's seat, the stopper provided on the floor between the two pedals. Therefore, it is possible to prevent both pedals from stepping together and avoid dangerous movements.

  Further, since the pedals can be prevented from co-stepping, the pedals can be brought closer to each other, so that the layout of the pedals can be facilitated particularly in a small construction machine having no room in the floor space around the driver's seat.

In this case, the scan stopper, because the foot as a stepping co disposed in a state that prevents its lowered receives from the lower side, if for example a stopper, provided on the high partition wall shaped to shield between the pedals, that is, the foot Compared to the case where the left and right movements are restricted, the movement of the foot is not restrained more than necessary, and good operability can be ensured.

Also, in situations where both pedal is provided with a height difference as the traveling pedal and the swing pedal, the scan stopper, higher than tread low side of the pedal, connecting the ends of the side between close at both tread Since it protrudes on the floor with a height that does not protrude above the straight line, it is possible to reliably prevent co-stepping even if the foot is stepped on in a state where the foot is inclined in the left-right direction.

According to the invention of claim 2 , when there is a difference in the front-rear dimension of the tread surfaces of both pedals, the stopper is placed on the floor on the side of the pedal having a smaller front-rear dimension with the same front-rear length as the pedal. Since the protrusion is provided, the stopper can be reduced to the minimum necessary while ensuring the co-stepping prevention effect. For this reason, there is no possibility that the stopper interferes with the movement of the foot or the installation of other devices.

According to the invention of claim 3 , when both pedals are provided so as to be inclined forward, the stopper is inclined in accordance with the inclination of the pedal, so that the stopper is horizontal and a part of the stopper protrudes above the pedal. There is no possibility that the protruding stopper portion will interfere with foot replacement or stepping operation as in the case where it is provided in such a state.

According to the fourth and fifth aspects of the present invention, since the locking member that locks one pedal so that it cannot be stepped on is also used as a stopper, there is no need for an installation space dedicated to the stopper, and the layout of the pedal and other devices becomes easy.

According to the fifth aspect of the present invention, the lock member can be moved between the lock position and the stopper position only by rotating the lock member around the horizontal axis. In addition, the lock member can be locked and stabilized at both positions by the stop member and the spring. For this reason, both the locking action at the locking position by the locking member and the stopper action at the stopper position can be stably performed, and the switching operation between the locking function and the stopper function is simplified.

An embodiment of the present invention and a reference form for clarifying the features of the embodiment will be described with reference to FIGS.

  The present invention is not limited to a hydraulic excavator, and two types of pedals to be stepped on are arranged side by side on the floor where the driver's seat is provided, regardless of the type of pedal and the difference in height of the tread. It can be widely applied as a pedal device for construction machinery.

In the following embodiments and reference embodiments , the left and right traveling pedals 8 and 9 and the swing pedal 10 shared as an offset pedal are tilted forward in accordance with the description of the background art. As an example, the pedal device of the hydraulic excavator arranged in (1) is used.

Reference form (see FIGS. 1 to 4)
In this reference form and each embodiment described later ,
A. The left and right traveling pedals 8 and 9 are installed in the center of the floor in front of the driver's seat. The point where the swing pedal 10 is small)
B. The traveling pedals 8 and 9 and the swing pedal 10 are provided in an upwardly inclined posture, and the heights of the respective tread surfaces 8a, 9a and 10a are different (the tread surfaces 8a and 9a of the traveling pedals 8 and 9 are different). The point is higher than the tread surface 10a of the swing pedal 10), which is the same as the prior art shown in FIG.

In the reference embodiment, only differences from the prior art will be described. On the floor 11 between the right travel pedal 9 and the swing pedal 10, a portal-shaped (inverted U-shaped) stopper 12 made of a pipe material or a bar material is provided. The foot F (see FIG. 3) which is a common step is received from the lower side and is attached to the floor 11 via the plate 13 in a state where the lowering is prevented.

  More specifically, as shown in FIG. 4, the stopper 12 has a front-rear length dimension L substantially the same as the front-rear dimension of the tread surface of the swing pedal 10, and the swing pedal 10 is not operated as shown in FIG. 2. Has a height dimension H that is substantially the same as the height of the tread surface, and protrudes laterally of the swing pedal 10 (approximately the same position in the front-rear direction) and substantially parallel to the left side surface of the swing pedal 10. .

  The height dimension H of the stopper 12 may be the same as or slightly larger than the height dimension of the tread surface 10a when the swing pedal 10 is not operated. Or if it is the range of the play of the swing pedal 10 (the range where a swing operation is not performed even if it is stepped on), it may be set lower than the height dimension of the tread surface 10a of the pedal 10.

  With this configuration, as shown in FIG. 3, when the travel pedals 8 and 9 are stepped on, the right foot F that has stepped on the right travel pedal 9 protrudes rightward from the pedal 9 and immediately before the swing pedal 10 is also stepped on. Since it hits the upper surface of the stopper 12, further lowering (stepping operation) is prevented.

  That is, it is possible to reliably prevent the right travel pedal 9 and the swing pedal 10 from being depressed together. For this reason, it is possible to avoid a dangerous motion (simultaneous operation of running and swing) due to co-stepping.

  In addition, since there is no possibility of co-stepping in this way, both pedals 9 and 10 can be brought as close as possible, so in a small excavator where there is no room in the floor space in front of the driver seat, in particular, the driver seat. The layout of the swing pedal 10 installed in a limited space range on the right front side is facilitated.

  In this case, since the stopper 12 is provided in a state in which the right foot F that serves as a co-step is received from the lower side and prevents its lowering, for example, a high partition-like stopper that shields between both pedals instead of the stopper 12 is provided. Compared to the case where the right foot F is provided in a state in which the movement of the right foot F in the left-right direction is restricted, the movement of the right foot F is not restricted more than necessary, and good operability can be ensured.

  Further, the stopper 11 is provided with a floor 11 having substantially the same height dimension H as the tread surface 10a of the swing pedal 10 on the lower side of the travel pedals 8, 9 and the swing pedal 10 having a difference in height between the tread surfaces 8a, 9a, 10a. Due to the fact that it is projecting upward, it is possible to generate a high-risk movement such as suddenly starting a swing motion while driving at a medium or high speed, ie, when the high-speed right travel pedal 9 is depressed. Can be prevented. Therefore, the safety value is high.

  Further, the stopper 12 is provided on the side of the pedal 10 having a front-rear length dimension L that is substantially the same as that of the swing pedal 10 having a smaller front-rear dimension among the pedals 9, 10 that differ in the front-rear dimension of the tread surfaces 8a, 9a, 10a. Therefore, the stopper 12 can be made as small as necessary while ensuring the co-stepping prevention effect. For this reason, there is no possibility that the stopper 12 interferes with the movement of the foot or the installation of other devices.

The first embodiment (see FIG. 5)
Only differences from the reference embodiment will be described.

In the reference embodiment, the stopper 12 is provided on the floor 11 with a height dimension H that is substantially the same as the height of the tread surface 10a when the lower pedal 10 of the pedals 9 and 10 is not operated. In the second embodiment, the stopper 12 is higher than the tread surface 10a of the lower-side swing pedal 10, and does not protrude above the straight line L connecting the end portions on the closer sides of the tread surfaces 9a and 10a. It is provided on the floor 11 with a certain size.

  In this way, even when the foot F is stepped on in a state where the foot F is tilted downward as shown in the drawing, it is possible to reliably prevent co-stepping.

Second embodiment (see FIG. 6)
In the second embodiment, on the premise that both pedals 9 and 10 (only the right travel pedal 9 is shown as an example in FIG. 6) are provided so as to incline forward, the stopper 12 (precisely the stopper 12). Is provided on the floor 11 so as to incline forward at an angle substantially equal to that of the pedals 9 and 10.

  In this way, there is no possibility that the protruding stopper portion will interfere with the foot replacement or the stepping operation as in the case where the stopper 12 is provided horizontally and a part thereof protrudes above the pedals 9 and 10.

Third embodiment (see FIG. 7)
In the third embodiment, the lock member 14 that locks the right travel pedal 9 so that it cannot be depressed is also used as a stopper.

  The locking member 14 is formed in a gate shape similar to that of the first embodiment, and a lower end of the locking member 14 is attached to a bracket 15 mounted on the floor 11 between the right traveling pedal 9 and the swing pedal 10 in the front-rear direction horizontal shaft 16. Installed by.

  As a result, the lock member 14 is supported so as to be pivotable to the left and right about the horizontal shaft 16, and the upper end abuts against the right travel pedal 9 from the lower surface in the right-turned state (left-turned in FIG. 5 as viewed from the front). The pedal 9 is locked so that it cannot be stepped on, and is positioned between the pedals 9 and 10 in a left-turned state to act as a stopper.

  According to this configuration, since the lock member 14 for the right travel pedal 9 is also used as a stopper, an installation space dedicated to the stopper becomes unnecessary, and the layout of the pedals 8 to 10 and other devices becomes easy.

  Moreover, the following structure is taken as a means to stabilize the lock member 14 in a lock position and a stopper position.

  (A) A hook-shaped lock plate 17 is provided on the lower surface of the right travel pedal 9 so that the upper end of the lock member 14 is engaged at the lock position.

  (B) The bracket 15 is provided with stop members 18 and 19 that come into contact with the lock member 14 at both positions and stop further rightward or leftward rotation.

  (C) A compression coil spring (toggle spring) 20 is provided between the lock member 14 and the bracket 15 to exert a spring force in a direction in which the lock member 14 is pressed against the stop members 18 and 19 at both positions.

  With this configuration, the lock member 14 can be moved between the lock position and the stopper position only by rotating the lock member 14 around the horizontal axis 16, and can be stabilized at both positions. For this reason, both the locking action at the locking position by the locking member 14 and the stopper action at the stopper position can be stably performed, and the switching operation between the locking function and the stopper function is simplified.

  Note that the lock plate 17 may be omitted, and the lock member 14 may be held at the lock position only by the stop member 18 and the spring 20.

Other Embodiments In each of the above embodiments, the case where a layout in which the swing pedal 10 is arranged on the right side of the right traveling pedal 9 is illustrated, but the present invention
(I) When a pedal other than the swing pedal 10 or the swing pedal is disposed on the left side of the left traveling pedal 8,
(Ii) The present invention can be applied to the case where separate pedals are arranged not only on the left and right sides of the travel pedals 8 and 9 but also on the left and right sides.

  In the case of (ii) above, the stopper 12 or the stopper 14 also serving as a lock member may be provided for each separate pedal.

  Further, the present invention is not limited to the combination of a traveling pedal and other pedals, and is not limited to a small hydraulic excavator or a hydraulic excavator. The present invention can also be applied to a hydraulic excavator or a pedal device of another construction machine.

It is a perspective view of a pedal device concerning a reference form of the present invention. It is a front view of the same apparatus. FIG. 3 is a view corresponding to FIG. 2 for explaining a co-stepping situation. It is a top view of the apparatus. 1 is a partially enlarged front view of a pedal device according to a first embodiment of the present invention. It is a side view of the pedal apparatus concerning 2nd Embodiment of this invention. It is a partial expanded front view of the pedal apparatus concerning 3rd Embodiment of this invention. 1 is a schematic side view of a small hydraulic excavator to which the present invention is applied. It is a perspective view of the conventional pedal apparatus.

DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving body 6 Work attachment 7 Driver's seat 8,9 Left and right traveling pedal 10 Swing pedal 11 Floor 12 Stopper L A straight line connecting the ends of the near side of both pedals 14 Locking member 15 serving as a stopper 15 Bracket 16 Horizontal shaft 18 as a rotation center of the lock member 18, 19 Stop member 20 Spring

Claims (6)

On the floor where the driver's seat is located, two types of pedals to be stepped on are arranged side by side and with a height difference , and both pedals are stepped on by the same foot on the floor between the two pedals. A stopper is provided to prevent stepping, and this stopper is higher than the stepping surface of the lower pedal among the above two pedals so that both feet can be received from the lower side and the lowering is prevented. A pedal device for a construction machine, wherein the pedal device projects upward on the floor with a height dimension that does not protrude upward from a straight line connecting the ends on the near side of the tread surface . The stopper is out of both pedals there is a difference in the longitudinal dimension of the tread surface, on the side of the small pedal of longitudinal dimension, collision set on the floor with approximately the same longitudinal length as the longitudinal dimension of the pedal The pedal device for a construction machine according to claim 1, wherein The stopper is claim 1 or 2 Symbol mounting, characterized in that in an inclined position of up before having substantially the same angle and placed above both pedals in an inclined position of the forwardly and upwardly projecting onto the floor Construction machinery pedal equipment. The lock member is provided between a lock position where one of the pedals is locked in a state in which the pedal cannot be operated and a stopper position which prevents both pedals from being stepped together as a stopper on the floor between the pedals. in construction machine pedal device according to any one of claims 1 to 3, wherein the movably provided et the fact. A lock member is attached to the bracket fixed on the floor so as to be rotatable between a lock position and a stopper position about a horizontal axis in the front-rear direction, and a stop member that stops the lock member at both positions, locking members pedal system for a construction machine according to claim 4 Symbol mounting, characterized in that the spring is provided et the to exert a spring force in a direction to press this stop member. A traveling pedal for traveling the lower traveling body and a swing pedal for swinging the work attachment attached to the upper swinging body to the left and right are arranged on the floor side by side, and the stopper is provided on the floor between the two pedals. 6. The construction machine pedal device according to claim 1 , wherein the pedal device is a construction machine.

Images