JP2012193548A - Pedal device of construction machine and pedal unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pedal device of construction machine that is suitable for the work for adjusting the posture of an operation pedal to a floor board.SOLUTION: A pedal device of construction machine includes an oscillating body 20 supported so as to be oscillated around a predetermined shaft 5 with respect to a floor board 2 of a cab of a construction machine, an operation pedal 30 for receiving driving operation, and a connecting mechanism 40 for connecting the oscillating body 20 and the operation pedal 30 so that the posture of the operation pedal 30 to the oscillating body 20 can be adjusted, in which the oscillating body 20 is provided with a locking part 25 for locking the oscillating body 20 at a predetermined position with respect to the floor board 2.

Description

  The present invention relates to a pedal device for a construction machine and a pedal unit.

  In a cab of a construction machine such as a hydraulic excavator or a bulldozer, an operation pedal for receiving a stepping operation by a driver is provided. The operation pedal is supported so as to be swingable about a predetermined axis with respect to the floor plate of the cab, and is swung by a front stepping operation and a rear stepping operation by a driver.

  In recent years, pedal devices have been developed that can adjust the posture (inclination) of the operation pedal with respect to the floor board according to the physique and preferences of the driver (see, for example, Patent Document 1). This pedal device has a rocking body that is swingably supported with respect to a floor board, and a bolt that penetrates an arc-shaped long hole formed in an operation pedal is fitted into a screw hole formed in the rocking body. ing. The posture of the operation pedal relative to the floor board can be adjusted by loosening the bolt, changing the posture of the operation pedal with respect to the rocking body, and tightening the bolt again.

Japanese Patent Laid-Open No. 6-230841

  However, in the conventional pedal device, when adjusting the posture of the operation pedal with respect to the floor plate, the oscillating body oscillates, so the workability is poor.

  This invention is made in view of the said subject, Comprising: It aims at providing the pedal apparatus of a construction machine suitable for the operation | work which adjusts the attitude | position with respect to the floor board of an operation pedal.

In order to solve the above object, the present invention provides:
An oscillating body supported so as to be oscillatable about a predetermined axis with respect to a floor plate of a cab of a construction machine;
An operation pedal that accepts driving operations;
A coupling mechanism that couples the rocking body and the operation pedal so that the posture of the operation pedal with respect to the rocking body is adjustable;
The rocking body is provided with a lock portion for locking the rocking body at a predetermined position with respect to the floor board. A pedal device for a construction machine is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the pedal apparatus of a construction machine suitable for the operation | work which adjusts the attitude | position with respect to the floor board of an operation pedal can be provided.

The side view which shows the pedal unit of the construction machine by one Embodiment of this invention, and the apparatus of the periphery of a pedal unit partially fractured | ruptured Disassembled side view of rocking body and operation pedal Side view showing the posture of the operating pedal relative to the rocking body (1) Side view showing the posture of the operating pedal relative to the rocking body (2) Perspective view of jig Perspective view of locking mechanism

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In each of the drawings, the same or corresponding components are denoted by the same or corresponding reference numerals, and description thereof will be omitted.

  FIG. 1 is a side view showing a pedal unit of a construction machine according to an embodiment of the present invention and a device around the pedal unit in a partially broken view. In FIG. 1, the state indicated by the solid line indicates the unlocked state of the oscillator, and the state indicated by the two-dot chain line indicates the locked state of the oscillator. FIG. 2 is an exploded side view of the oscillator and the operation pedal.

  On a floor plate 2 of a cab of a construction machine such as a hydraulic shovel or a bulldozer, as shown in FIG. 1, a device 3 that performs a predetermined operation in response to an operation on a pedal device 10 described later is installed. The device 3 includes a fixed portion 4 fixed to the floor plate 2, a shaft portion 5 supported by the fixed portion 4, a rotating body 6 that can rotate around the shaft portion 5, and ascending and descending in conjunction with the rotation of the rotating body 6. The first elevating pins 7 and 8 are provided. The 1st and 2nd raising / lowering pins 7 and 8 are each urged | biased upwards with the spring etc., respectively.

  A pedal unit 9 is disposed around the device 3. The pedal unit 9 includes a pedal device 10 and a lock mechanism 50.

  The pedal device 10 includes a rocking body 20 that is swingably supported with respect to the floor board 2 of the cab and an operation pedal 30 that receives a driving operation. The rocking body 20 and the operation pedal 30 are connected by a connecting mechanism 40 described later.

  The oscillating body 20 includes a connecting portion 21 connected to the rotating body 6 of the device 3, a plate-like portion 22 arranged perpendicular to the shaft portion 5, and the like. The rocking body 20 can rock around the shaft portion 5.

  The operation pedal 30 includes, for example, a pedal body 31 and a plate-like portion 32 that protrudes from the back surface (the surface opposite to the operation surface 31a) 31b of the pedal body 31. The plate-like portion 32 is disposed perpendicular to the shaft portion 5 and is in surface contact with the plate-like portion 22 of the rocking body 20.

  The pedal body 31 includes a front stepping portion 31c that receives a front stepping operation by a driver, and a rear stepping portion 31d that receives a rear stepping operation by a driver. The front step part 31c and the rear step part 31d are integrally formed.

  The operation surface 31 a of the pedal body 31 is provided with unevenness for preventing slipping.

  In the pedal device 10, when the operation pedal 30 is stepped forward by the driver, the operation pedal 30, the rocking body 20, and the rotating body 6 are integrated in the direction of arrow A (see FIG. 1) with the shaft portion 5 as the center. Rotate. At this time, the first lifting pin 7 is lowered in conjunction with the rotation of the rotating body 6.

  In the pedal device 10, when the operation pedal 30 is stepped on by the driver, the operation pedal 30, the rocking body 20, and the rotating body 6 are centered on the shaft portion 5 in the arrow B direction (see FIG. 1). Rotate integrally. At this time, the second elevating pin 8 is lowered in conjunction with the rotation of the rotating body 6. In this way, the pedal device 10 rotates in both the A direction and the B direction from the neutral position.

  The pedal device 10 further includes a coupling mechanism 40 that couples the rocking body 20 and the operation pedal 30 so that the posture of the operation pedal 30 with respect to the rocking body 20 can be adjusted.

  The coupling mechanism 40 includes, for example, a plurality of bolts 41 and 42 for fastening the rocking body 20 and the operation pedal 30 and a jig 43 in which a plurality of screw holes corresponding to the plurality of bolts 41 and 42 are formed. is doing.

  The plurality of bolts 41 and 42 are respectively arranged in parallel with the shaft portion 5, inserted into the bolt holes of the rocking body 20 and the bolt holes of the operation pedal 30, and screwed into the corresponding screw holes.

  The plurality of bolt holes 23 and 24 formed through the plate-like portion 22 of the rocking body 20 are formed in an arc shape centering on an axis parallel to the shaft portion 5 as shown in FIGS. They are lined up on the circumference. Hereinafter, the bolt holes 23 and 24 are referred to as arc holes 23 and 24.

  On the other hand, the plurality of bolt holes 33 and 34 formed through the plate-like portion 32 of the operation pedal 30 are formed in a circular shape as shown in FIG. The diameters of the bolt holes 33 and 34 are set to be slightly larger than the diameters of the bolts 41 and 42 to be inserted. Hereinafter, the bolt holes 33 and 34 are referred to as circular holes 33 and 34.

  As shown in FIGS. 3 and 4, the plurality of circular holes 33 and 34 are set so as to overlap with the corresponding arc holes 23 and 24, respectively, when viewed from the axial direction of the shaft portion 5.

  For example, as shown in FIG. 3, when one circular hole 33 is at the upper end in the arc hole 23, the other circular hole 34 is at the lower end in the arc hole 24. In this state, the gradient of the operation pedal 30 with respect to the floor board 2 becomes gentle.

  As shown in FIG. 4, when one circular hole 33 is at the lower end in the arc hole 23, the other circular hole 34 is at the upper end in the arc hole 24. In this state, the gradient of the operation pedal 30 with respect to the floor board 2 becomes steep.

  As described above, the plurality of arc holes 23 and 24 are formed in an arc shape with an axis parallel to the shaft portion 5 as the center, and are arranged on the same circumference. Therefore, when one circular hole 33 continuously moves from the upper end to the lower end in the arc hole 23, the other circular hole 34 continuously moves from the lower end to the upper end in the arc hole 24. Therefore, the gradient with respect to the floor board 2 of the operation pedal 30 can be adjusted continuously.

  FIG. 5 is a perspective view of the jig.

  For example, as shown in FIG. 5, the jig 43 includes a plurality of nuts 44 and 45 that are screw-coupled to the plurality of bolts 41 and 42, and a nut holder 46 to which the plurality of nuts 44 and 45 are fixed. Since the positional relationship between the plurality of nuts 44 and 45 is fixed, workability is good.

  A plurality of bolt holes 47, 48 are formed through the nut holder 46, and nuts 44, 45 are fixed to the outlet edges of the bolt holes 47, 48 by fillet welding or the like. Bolts 41 and 42 through which bolt holes 47 and 48 pass are screwed into the screw holes 44a and 45a of the nuts 44 and 45, respectively.

  In this connection mechanism 40, by loosening the plurality of bolts 41, 42, it is possible to move in the circumferential direction in the arc holes 23, 24 through which the plurality of bolts 41, 42 are inserted, respectively. The posture can be adjusted. Further, by tightening the plurality of bolts 41 and 42, the posture of the operation pedal 30 with respect to the rocking body 20 is fixed.

  In the pedal device 10, the rocking body 20 is provided with a lock hole (locking portion) 25 for locking the rocking body 20 to the floor plate 2 at a predetermined position, as shown in FIGS. 1 to 4. Since the oscillating body 20 is locked at a predetermined position (for example, a neutral position) with respect to the floor plate 2, workability of adjusting the posture of the operation pedal 30 with respect to the floor plate 2 is improved.

  FIG. 6 is a perspective view of the lock mechanism.

  The lock mechanism 50 can lock the rocking body 20 at a predetermined position with respect to the floor plate 2. The lock mechanism 50 includes, for example, a lock pin 51 that can be inserted into and removed from a lock hole 25 (see FIG. 1) formed in the plate-like portion 22 of the rocking body 20. The lock hole 25 is a hole parallel to the shaft portion 5, and when the lock pin 51 is inserted into the lock hole 25, the swing of the swing body 20 around the shaft portion 5 is restricted. When the lock pin 51 is extracted from the lock hole 25, the swing body 20 can swing around the shaft portion 5.

  The lock mechanism 50 further supports a support mechanism 52 that supports the lock pin 51 with respect to the floor plate 2 so as to be rotatable about an axis parallel to the lock pin 51 and to be movable in the axial direction of the lock pin 51. Have.

  The support mechanism 52 includes, for example, a fixing portion 53 that is fixed to the floor plate 2 and a pin portion 55 that is connected in parallel to the lock pin 51. The pin portion 55 is rotatably inserted into a through hole formed in the fixed portion 53, and the through hole guides the pin portion 55 in the axial direction.

  The lock pin 51 is supported so as to be rotatable about the pin portion 55 with respect to the floor plate 2. The rotation trajectory of the lock pin 51 is set to be orthogonal to the swing trajectory of the lock hole 25 when viewed from the axial direction of the shaft portion 5. Therefore, the rocking body 20 can be reliably locked at a predetermined position.

  The support mechanism 52 may further include an elastic body (for example, a coil spring) 58 that is pressed against the pin portion 55 and elastically deformed when the lock pin 51 is manually pulled out from the lock hole 25 in order to prevent unlocking due to an erroneous operation. . The coil spring 58 is provided between the head portion 55a of the pin portion 55 and the fixing portion 53, for example.

  Next, a method for adjusting the posture of the operation pedal 30 with respect to the floor board 2 in the pedal device 10 having the above-described configuration will be described.

  First, the operation of the operation pedal 30 is stopped, and the operation pedal 30, the rocking body 20, and the rotating body 6 are returned to the neutral position. At this time, the lock pin 51 of the lock mechanism 50 is in a position deviated from the axis of the lock hole 25 as shown by a solid line in FIG. Further, the operation pedal 30 and the rocking body 20 are fastened by a plurality of bolts 41 and 42 and the like.

  Next, the lock pin 51 is moved in the axial direction against the restoring force of the coil spring 58 and is rotated around the pin portion 55 to be positioned on the axis of the lock hole 25. Subsequently, as indicated by a two-dot chain line in FIG. 1, a lock pin 51 is inserted into the lock hole 25, and the oscillator 20 is locked in the neutral position. At this time, since the coil spring 58 is elastically restored, it is possible to prevent the lock pin 51 from being pulled out by an erroneous operation.

  Next, the plurality of bolts 41 and 42 are loosened, the operation pedal 30 is rotated with respect to the rocking body 20 around an axis parallel to the shaft portion 5, and the posture of the operation pedal 30 with respect to the rocking body 20 changes. At this time, since the oscillating body 20 is locked at the neutral position, the posture adjustment is easy. When the posture adjustment is finished, the plurality of bolts 41 and 42 are tightened, and the posture of the operation pedal 30 with respect to the rocking body 20 is fixed.

  Next, the lock pin 51 is moved in the axial direction against the restoring force of the coil spring 58, pulled out from the lock hole 25, rotated around the pin portion 55, and deviated from the axis of the lock hole 25. Moved to. Subsequently, the coil spring 58 is elastically restored, and the lock pin 51 is moved in the axial direction. In this way, the rocking body 20 is unlocked.

  Thereafter, when the operation pedal 30 is operated, the operation pedal 30, the rocking body 20, and the rotating body 6 rotate integrally around the shaft portion 5 in the arrow A direction or the arrow B direction, The elevating pin 7 or the second elevating pin 8 is lowered.

  As mentioned above, although one Embodiment of this invention was described, this invention is not restrict | limited to said embodiment. Various modifications and substitutions can be made to the above-described embodiment without departing from the scope of the present invention.

  For example, in the above embodiment, the arcuate holes 23 and 24 are formed in the rocking body 20, and the circular holes 33 and 34 are formed in the operation pedal 30, but the circular holes 33 and 34 are formed in the rocking body 20, Arc holes 23 and 24 may be formed in the operation pedal 30.

  Moreover, although the connection mechanism 40 of the said embodiment has the jig | tool 43, it does not need to have the jig | tool 43. FIG. In this case, the bolts 41 and 42 are screwed into screw holes formed in the rocking body 20 or the operation pedal 30.

  Moreover, although the jig | tool 43 of the said embodiment was comprised with the some nuts 44 and 45 and the nut holder 46, this invention is not limited to this. For example, the jig 43 may be a plate in which a plurality of screw holes are formed.

  Moreover, although the lock part 25 of the said embodiment was mentioned as the hole formed in the plate-shaped part 22, the protrusion formed in the plate-shaped part 22 may be sufficient, In this case, the lock mechanism 50 is a lock | rock. Instead of the pin 51, a hole for locking the protrusion may be provided.

2 Floor board 9 Pedal unit 10 Pedal device 20 Oscillator 22 Plate-like parts 23, 24 Bolt hole 25 Lock hole (lock part)
30 Operation pedal 32 Plate-like parts 33, 34 Bolt hole 40 Connection mechanism 41, 42 Bolt 43 Jig 44, 45 Nut 46 Nut holder 50 Lock mechanism

Claims (5)

An oscillating body supported so as to be oscillatable about a predetermined axis with respect to a floor plate of a cab of a construction machine;
An operation pedal that accepts driving operations;
A coupling mechanism that couples the rocking body and the operation pedal so that the posture of the operation pedal with respect to the rocking body is adjustable;
A pedal device for a construction machine, wherein the rocking body is provided with a lock portion for locking the rocking body at a predetermined position with respect to the floor board. The coupling mechanism has a plurality of bolts that fasten the rocking body and the operation pedal,
A plurality of bolt holes formed through the rocking body or the operation pedal are formed in an arc shape around an axis parallel to the predetermined axis, and are arranged on the same circumference.
2. The pedal device for a construction machine according to claim 1, wherein by loosening the plurality of bolts, the bolt can be moved in a circumferential direction through the bolt holes through which the plurality of bolts are inserted, and the posture can be adjusted.   The pedal device for a construction machine according to claim 2, wherein the connection mechanism further includes a jig in which a plurality of screw holes corresponding to the plurality of bolts are formed.   The pedal device for a construction machine according to claim 3, wherein the jig includes a plurality of nuts that are screw-coupled to the plurality of bolts, and a holder to which the plurality of nuts are fixed.   A pedal unit comprising the pedal device for a construction machine according to any one of claims 1 to 4, and a lock mechanism capable of locking the rocking body at a predetermined position with respect to the floor plate.

Images