JP2002227121A - Tilt mechanism for operation panel in paving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an operation panel easy to operate even when an operator rides on any one of upper and lower step sections in an asphalt finisher. SOLUTION: An operation panel device 11 is provided tiltably to a lower first operation position and an upper second operation position. A lock bar 18 for locking the operation panel device at first and second operation positions respectively and a gas spring 22 exciting the operation panel device to the second operation position side are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a tilt mechanism of an operation panel in a pavement machine having a screed portion such as an asphalt finisher.

[0002]

2. Description of the Related Art In general, in a paving machine having a screed portion such as an asphalt finisher, an operator receives, transports, spreads, and levels (paving width, paving) an asphalt mixture in addition to running the machine. Management operations such as thickness and compaction degree). And a traveling handle for performing these traveling operations and the operation of managing the mixture,
The operation means such as operation switches are collectively arranged on an operation panel attached to the rear of the body of the aircraft. However, in a small pavement machine having no operator seat for an operator, the operator may operate the screed portion. The user operates the traveling handle and operation switches of the operation panel while standing on the step formed at the rear.

[0003]

In the above-mentioned conventional pavement machine, it is of course possible for one operator to perform all operations. However, if there are enough personnel,
If there are two operators, an operator who manages the traveling operation and the state of receiving the mixture, and an operator who manages the leveling state of the mixture, the burden on the operator is reduced. In addition, in order to manage the traveling operation and the reception state of the mixture, it is desirable that the operator's viewpoint is higher, so that the field of view in front of the fuselage is wider. A lower viewpoint is desirable. Therefore, the upper and lower steps are provided on the screed part, and when one operator is alone, the traveling operation and the reception control of the mixture are usually performed while controlling the spread state of the mixture by placing it on the lower step. If you need to pay special attention to the running operation and the reception of the mixture, you must operate on the upper step section. It is proposed that the operator of the section manages the running operation and the receiving state of the mixture, while the operator of the lower step section manages the leveling state. However, if the upper and lower steps are provided in this manner, when the mounting position of the operation panel is aligned with the operator placed on the lower step, it is difficult to operate when the operator is placed on the upper step. If they are matched, there is a problem that it is difficult to operate when they are placed on the lower step portion. For this reason, it is conceivable to provide the operation panel so that it can be tilted up and down freely. In this case, however, the operation panel needs labor to move, or the locking operation for fixing the operation panel at the moved position is complicated. Then, there is a problem that a burden is imposed on the operator, and there is a problem to be solved by the present invention.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been created with the object of solving these problems, and is directed to a pavement machine having a screed portion such as an asphalt finisher. An operation panel provided with operation means such as a steering wheel and an operation switch, the operation panel being tiltably movable between a first operation position and a second operation position facing upward from the first operation position; And a biasing means for biasing the operation panel toward the second operation position. By doing so, the operation panel can be tilt-moved to the first operation position and the second operation position in correspondence with the operator who operates the vehicle, thereby improving operability and improving the operation panel. Is tilted upward by the biasing means toward the second operation position, so that the tilt movement can be easily performed without requiring any labor. In this device, the lock means is configured using a lock bar that can be displaced between a lock position that locks the operation panel at the first or second operation position and a lock release position that allows tilt movement of the operation panel, and The lock bar is configured to be displaced from the lock position to the unlock position in connection with the operation of the lock lever, so that the operation panel can be easily locked and unlocked by operating the lock lever. . Further, for example, a gas spring is useful as an urging means for urging the operation panel toward the second operation position. Further, the screed portion of the paving machine is provided with at least two steps at the top and bottom, while the first operation position of the operation panel is at a position corresponding to the operator on the lower step portion, and the second operation position is at the upper side. By setting the operation panel at a position corresponding to the operator on the step unit, the operation panel can be positioned at a position where the operation panel can be easily operated, regardless of whether the operation panel is on the upper or lower step unit.

[0005]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling body of an asphalt finisher. The traveling body 1 includes a crawler-type traveling device 2, a hopper 3 disposed in a front half of the body to receive asphalt mixture, and an asphalt received by the hopper 3. Various member devices such as a bar feeder 4 for sending the mixture to the rear of the machine, a screw spreader 5 for spreading and spreading the asphalt mixture sent from the bar feeder 4 on the roadbed are provided. The screed portion 6 for compacting and smoothing the asphalt mixture spread on the roadbed is pulled to the rear.

The screed portion 6 is provided with a screed plate 7, a tamper mechanism (not shown), and the like. The lower end of the screed portion 6 is located at a position one step higher than the road surface. A lower portion 8 is formed, and an upper step portion 9 that is one step higher than the lower step portion 8 is formed in front of the lower step portion 8. And
When there is only one operator, the operator usually rides on the lower step unit 8 to manage the spread state of the mixture and also manages the traveling operation and the reception of the mixture. If you need to pay attention, the upper step 9
And when there are two operators, the operator of the upper step unit 9 sits on the upper and lower step units 9 and 8 one by one, and manages the running operation and the receiving state of the mixture, while the lower step unit The operator of the section 8 can manage the leveling state.

On the other hand, reference numeral 10 denotes a body frame which covers the rear half of the traveling body 1 (behind the hopper 3), and the upper surface plate 10a of the body frame 10 has a front surface as shown in FIGS. It is formed in a low-back high inclination. This allows the operator to see through the front end of the hopper 3 without being disturbed by the body frame 10, not only when the operator is on the upper step 9, but also when the operator is on the lower step 8. I can do it.

Further, an operation panel device 11 is attached to the upper right side of the body frame 10 so as to protrude above the screed portion 6, and as will be described later, the operation panel device 11 It is configured to be capable of tilt movement.

The operation panel device 11 is of a box type, and an operation panel board 11a provided on the rear surface of the operation panel device 11 has an operation panel 12, an operation lever 13, and a hopper 3. Various operation means such as an operation switch 14 for receiving a material, transporting the material by the bar feeder 4, discharging the material by the screw spreader 5, and compacting by the screed portion 6 are provided.

A pair of left and right mounting legs 15 are integrally mounted on the front portion of the operation panel device 11 such that the lower ends thereof are suspended from the lower end of the operation panel device 11. The lower end of the leg 15 is supported by the rear plate 10b of the vehicle body frame 10 via a support shaft 16 so as to be swingable back and forth.
Can be tilted up and down to a first operation position and a second operation position, which will be described later, with the support shaft 16 as a fulcrum.

On the other hand, reference numeral 17 denotes a pair of left and right support brackets which are integrally attached to the body frame 10 side. The support brackets 17 are arranged so as to be close to the left and right sides of the left and right side surfaces 11b of the operation panel device 11. It is arranged,
The support bracket 17 is provided with a slide groove 17 a at a position on an arc centered on the support shaft 16. The slide groove 17a is formed so that the front end side is located at the upper side and the lower end side is located at the lower side. Further, both ends of the slide groove 17a are provided in a direction substantially orthogonal to the slide groove 17a, that is, the support shaft 16 is provided. The first and second lock grooves 17b and 17c facing the direction toward are provided. in this case,
The upper end of the first lock groove 17b has a slide groove 17a.
The second lock groove 17c
Are formed such that the upper end thereof is continuous with the upper end of the slide groove 17a.
A continuous portion between the slide grooves 7a and 7b and the slide groove 17a has a tapered shape 17d so that a lock bar 18 described later is smoothly moved.

The lower surface 11c of the operation panel device 11
, A locking lever 19 is supported via a pin shaft 19a so as to be swingable in the front-rear direction.
In 9, the lower half (the portion below the pin shaft 19 a) protrudes outward from the lower surface of the operation panel device 11 so that the operator can grip it. The upper half of the lock lever 19 is located inside the operation panel device 11, and the upper end of the lock lever 19 is fixed to the center of the lock bar 18 that faces in the left-right direction. I have. The left and right ends of the lock bar 18 are provided with a slot-shaped guide groove 20 a formed in a guide plate 20 with screws on the inner side of the left and right side surface portion 11 b of the operation panel device 11, and the guide groove 2.
The driving panel device 1 penetrates a guide groove 11d formed in the left and right side surface portions 11b so as to have the same shape and the same position as the driving panel device 1a.
1, and the projecting tip portion is configured to engage with the slide groove 17a of the support bracket 17 or the first and second lock grooves 17b and 17c.

Here, the guide grooves 20a, 11d of the operation panel device 11 are in substantially the same direction as the first and second lock grooves 17b, 17c of the support bracket 17, that is, in the direction substantially orthogonal to the slide groove 17a. It is formed to face. Further, the guide grooves 20a and 11d are set so as to be aligned with the first lock groove 17b or the second lock groove 17c with the swing of the operation panel device 11, but in the state where the alignment is performed. When the lock bar 1
8 is engaged with the first or second lock groove 17b, 17c through the guide groove 20a, 11d, and in this state, the lock bar 18 is linked to the forward and backward swing of the lock lever 19. The guide grooves 20a, 11d and the first or second lock grooves 17b, 17c are vertically moved in the grooves. Then, when the lock bar 18 is located at the lower ends of the guide grooves 20a and 11d and the first or second lock grooves 17b and 17c, the lock bar 18 supports the support shaft 16 of the operation panel device 11 as a fulcrum. However, when the lock bar 18 is located at the upper end of the guide grooves 20a, 11d and the first or second lock grooves 17b, 17c, the lock bar 18 does not move. Is the first or second lock groove 1
7b and 17c, the operation panel device 11 is moved to the slide groove 17a and moves in the slide groove 17a.
Up and down swing is allowed. That is, when the lock bar 18 is located at the lower end of the guide grooves 20a, 11d and the first or second lock grooves 17b, 17c, the lock bar 18 is at a lock position for preventing the vertical swing of the operation panel device 11, and , 11d and the upper end of the first or second lock groove 17b, 17c, it is configured to be in a lock release position that allows the operation panel device 11 to swing up and down.

Further, reference numeral 21 denotes a spring interposed between the lower surface 11c of the operation panel device 11 and the upper end of the locking lever 19, and the locking lever 19 is moved by the spring 21 into the guide grooves 20a, 11d and the first and second lock grooves 17b and 17c are constantly urged toward the lower end side, that is, toward the lock position side. Accordingly, when the guide grooves 20a, 11d and the first lock groove 17b or the second lock groove 17c are aligned, the lock bar 18 is held at the lock position by the urging force of the spring 21. When the operator swings the lower half of the locking lever 19 forward against the urging force of the spring 21, the lock bar 18 is moved to the guide groove 20.
a, 11d and the upper ends of the first and second lock grooves 17b, 17c, that is, they can be moved to the unlocked position.

Now, the operation panel device 11 is positioned at a first operation position (see FIG. 2) suitable for an operator mounted on the lower step portion 8 to operate the operation means on the operation panel panel 11a. In the state, the guide grooves 20 a and 11 d of the operation panel device 11 are set so as to be aligned with the first lock grooves 17 b of the support bracket 17.
The guide grooves 20a, 11d and the support bracket 1
7 is aligned with the first lock groove 17b.
As described above, the lock bar 18 is held at the lock position where the vertical movement of the operation panel device 11 is prevented by the urging force of the spring 21.
1 is locked in the first operation position. When the operator operates the lower half of the locking lever 19 forward from the state where the lock lever 18 is locked at the first operation position, the lock bar 18 is displaced to the unlock position as described above. When the operation panel device 11 is moved upward in this state, the lock bar 18 moves upward in the slide groove 17a, and the operation panel device 11 swings upward with the support shaft 16 as a fulcrum. Then, the operation panel device 11 is in a second operation position suitable for the operator on the upper step section 9 to operate the operation means on the operation panel board 11a (see FIG. 3).
When the lock bar 18 moves upward, the lock bar 18 reaches the upper end of the slide groove 17a, and the guide grooves 20a and 11d are aligned with the second lock groove 17c. When the guide grooves 20a, 11d and the second lock groove 17c are aligned, the lock bar 18
The driving panel device 11 is automatically displaced to the lock position by receiving the urging force of 1, so that the operation panel device 11 is locked to the second operation position. When the operation panel device 11 in the second operation position is moved to the first operation position, the lock lever 19 is similarly operated forward to set the lock bar 18 to the unlock position, and then the operation is started. If the panel device 11 is moved down to the first operation position, the guide grooves 20a, 11d
And the first lock groove 17b are aligned with each other, and the lock bar 18 is automatically displaced to the lock position, so that the operation panel device 11 is locked at the first operation position.

On the other hand, reference numeral 22 denotes a gas spring. The rod-side end 22a of the gas spring 22 is supported by the left and right side surfaces 11b of the operation panel device 11, and the head-side end 22b is supported by the support bracket 17. Supported. The gas spring 22 constantly urges the operation panel device 11 to the upper movement side, that is, the second operation position side, by the pressurized gas sealed in the cylinder. 11 is set to be slightly larger than the force for lowering to the first operation position side by its own weight. Thus, as described above, when the operation panel device 11 is moved from the first device position to the second operation position, the operation panel device 11 is pushed upward with a small force, and the urging force of the gas spring 22 is When the operation panel device 11 is automatically moved up to the second position and the operation position is changed from the second operation position to the first operation position, the operation panel device 11 can be moved down with a small force. Reference numeral 23 denotes a handle provided below the operation panel panel 11a of the operation panel device 11,
When the operation panel 11 is moved up and down, the operator can hold it.

In the construction as described above, the screed section 6 is provided with upper and lower step sections 9 and 8, and the operator can select an upper or lower step section depending on the working state and the number of operators. The operator operates the operation panel device 11 on the upper and lower steps 9 and 8. The operation panel device 11 includes a second operation position suitable for operation by the operator on the upper step unit 9 and a lower step unit. 8 is vertically movable to a first operation position suitable for operation by the operator described in FIG. As a result, the operation panel device 11 can be positioned at a position where it can be easily operated, regardless of whether it is placed on the upper or lower step portions 9 and 8, and the operability is excellent. Further, in this apparatus, since the operation panel device 11 is urged upward by the gas spring 22, no force is required when the operation panel device 11 is moved upward, and the operation is performed when the operation panel device 11 is moved downward. There is no possibility that the panel device 11 will fall due to gravity and cause an impact. Moreover, in this case, the urging force of the gas spring 22 is applied to the operation panel device 1.
1 is set to be slightly larger than the force to move down by its own weight, so that the operating panel device 11 jumps up suddenly when moving up, or a large force is required when moving down. Such problems can be avoided. In addition, the operation panel device 11 is in the first position when the lock bar 18 is located at the lock position.
When the lock bar 19 is locked at the second operation position and the lock bar 19 is located at the lock release position, vertical tilt movement is allowed, but the lock bar 19 is locked by the urging force of the spring 21. While being held at the position, the displacement from the locked position to the unlocked position is performed by the operator swinging the locking lever 19. Accordingly, the vertical tilt movement of the operation panel device 11 and the locking and unlocking at the first and first operation positions can be performed easily and easily without requiring the operator's labor, and practicality is improved. Excellent.

[Brief description of the drawings]

FIG. 1 is a plan view of an asphalt finisher.

FIG. 2 is a side view of the asphalt finisher when the operation panel device is at a first operation position.

FIG. 3 is a side view of the asphalt finisher when the operation panel device is at a second operation position.

FIG. 4 is a plan view of the operation panel device.

FIG. 5 is a side view of the operation panel device.

FIG. 6 is an enlarged view of a lock unit.

FIG. 7 is a sectional view taken along the line AA of FIG. 4;

8 is an enlarged cross-sectional view taken along the line BB of FIG. 7;

FIG. 9 is a schematic perspective view of an operation panel device.

[Explanation of symbols]

 6 Screed part 8 Lower step part 9 Upper step 11 Operation panel device 11a Operation panel 11d Guide groove 12 Travel handle 14 Operation switch 17 Support bracket 17a Slide groove 17b First lock groove 17c Second lock groove 18 Lock bar 19 Lock lever 22 Gas spring

Claims (4)

[Claims] 1. A paving machine provided with a screed portion such as an asphalt finisher, wherein an operation panel provided with operation means such as a handle and an operation switch is directed to a first operation position and an upper side than the first operation position. Locking means for movably tilting the second operation position and further locking the operation panel at the first and second operation positions,
And a biasing means for biasing the operation panel toward the second operation position. 2. The lock device according to claim 1, wherein the lock means includes a lock bar that is displaceable between a lock position that locks the operation panel at the first or second operation position and a lock release position that allows tilt movement of the operation panel. A tilt mechanism for an operation panel of a paving machine, wherein the lock bar is configured to be displaced from a lock position to an unlock position in connection with an operation of a lock lever. 3. The tilting mechanism for an operation panel in a pavement machine according to claim 1, wherein the urging means for urging the operation panel toward the second operation position is a gas spring. 4. The operator according to claim 1, 2 or 3, wherein the screed portion of the paving machine is provided with at least two upper and lower steps, while the first operation position of the operation panel is on the lower step. Wherein the second operation position is set to a position corresponding to the operator placed on the upper step portion at a position corresponding to the operation panel.