Working machine

Abstract

To provide a work machine allowing fixation and fixation release of its air compressor to be easily carried out.SOLUTION: A work machine allows a wheel (12a) to be fixed between a wheel stopper (21) and a fixation block (25) by energizing a lever (23) in a fixation direction with an energizing member (28) rotated in the fixation direction from an overlapped state of a support shaft (22) on a virtual line (L2) connecting a fixation shaft (26) and a rotation shaft (27), and fixation of the wheel (12a) with the fixation block (25) to be released by energizing the lever (23) in a releasing direction with the energizing member (28) rotated in the releasing direction from the overlapped state of the support shaft (22) on the virtual line (L2).SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a work machine equipped with an air compressor.

Background Art

[0002] Patent Document 1 discloses a high-post type work machine including a pole erected on a basic structure, a swivel body rotatably supported by the pole, a work device supported by the swivel body, a cab disposed on the swivel body, and a platform provided adjacent to the cab.

[0003] In a work machine, it is common to use an air compressor when cleaning the swivel body. However, in the high-post type work machine described in Patent Document 1, it is cumbersome to carry the air compressor back and forth between the ground and the swivel body every time cleaning work is performed. Therefore, it is desirable to install the air compressor on the platform.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Here, the air compressor installed on the platform needs to be securely locked against the vibration generated by the work machine. Further, when the air compressor interferes with a door provided on the swivel body (for example, the maintenance door of the machine room), it is required to easily move the air compressor. Note that such problems can occur not only in high-post type work machines but also in any work machine.

[0006] The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a working machine provided with a stopper device capable of easily fixing and releasing an air compressor on a vehicle body.

Means for Solving the Problems

[0007] In order to achieve the above object, the present invention provides a working machine including a vehicle body, a rail extending on the vehicle body, and an air compressor configured to be movable on the rail by wheels and generate compressed air for cleaning the vehicle body. The working machine further includes a wheel stopper that abuts on the wheels that have reached a fixed position on the rail, a support shaft extending in the width direction of the rail, a lever rotatably supported by the support shaft, a wheel receiving portion fixed to the lever and pushed by the wheels moving in a direction approaching the fixed position to rotate the lever in the fixing direction, a fixing block fixed to the lever and pushed by the wheels moving in a direction away from the fixed position to rotate the lever in the release direction opposite to the fixing direction, a fixing shaft fixed to the rail, a rotation shaft fixed to the lever at a position different from the support shaft, and a biasing member having one end connected to the fixing shaft and the other end connected to the rotation shaft. The stopper device biases the lever in the fixing direction by the biasing member rotated in the fixing direction from a state where the support shaft overlaps on an imaginary line connecting the fixing shaft and the rotation shaft, thereby fixing the wheels between the wheel stopper and the fixing block, and biases the lever in the release direction by the biasing member rotated in the release direction from the state where the support shaft overlaps on the imaginary line, thereby releasing the fixing of the wheels by the fixing block.

Effects of the Invention

[0008] According to the present invention, it is possible to obtain a working machine provided with a stopper device capable of easily fixing and releasing an air compressor on a vehicle body. In addition, problems, configurations, and effects other than those described above will be clarified by the description of the following embodiments.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0010] An embodiment of the disassembling machine 1 (working machine) according to the present invention will be described with reference to the drawings. Note that a specific example of the working machine is not limited to the disassembling machine 1, and it may be a hydraulic excavator, a crane, a dump truck, or the like. In addition, the front, rear, left, and right in this specification are based on the viewpoint of an operator who rides on the disassembling machine 1 and operates it, unless otherwise specified.

[0011] FIG. 1 is a side view of the disassembling machine 1. FIG. 2 is a perspective view of the upper revolving body 4. As shown in FIGS. 1 and 2, the disassembling machine 1 mainly includes a foundation structure 2 fixed to the ground, a cylindrical post 3 erected on the foundation structure 2, and an upper revolving body 4 rotatably supported at the upper end of the post 3. Further, the upper revolving body 4 supports a front working machine 5 (working device), a cab 6 (driver's cab), a machine room 7, and a counterweight 8.

[0012] The front working machine 5 is supported at the front end of the upper revolving body 4 and at the center in the left-right direction. The front working machine 5 includes a boom 5a supported by the upper revolving body 4 so as to be able to rise and fall, an arm 5b rotatably supported at the tip of the boom 5a, a grapple 5c (working tool) supported at the tip of the arm 5b, and hydraulic cylinders 5d, 5e, 5f for driving the boom 5a, the arm 5b, and the grapple 5c.

[0013] The cab 6 is supported by the upper revolving body 4 at the front end of the upper revolving body 4 and on one side in the left-right direction (in the example of FIG. 1, the left side). That is, the cab 6 is adjacent to the front working machine 5 in the left-right direction of the disassembling machine 1. An internal space for an operator to operate the disassembling machine 1 is formed in the cab 6. And in the internal space of the cab 6, a seat on which the operator sits and an operating device operated by the operator sitting on the seat are arranged.

[0014] The operating device receives the operation of the operator for operating the disassembling machine 1. When the operating device is operated by the operator, the upper revolving body 4 turns and the front working machine 5 operates. The operating device may include, for example, a turning lever, a front operation lever, a switch, etc.

[0015] The machine room 7 is supported by the upper revolving body 4 behind the front working machine 5 and the cab 6. The machine room 7 houses components such as an engine that generates driving force for operating the disassembling machine 1, a hydraulic pump that supplies hydraulic oil to the hydraulic cylinders 5d, 5e, 5f, and a radiator that cools the coolant of the engine. Also, as shown in FIG. 2, opening and closing doors 7a, 7b for accessing the internal components are provided on the side surface and the upper surface of the machine room 7.

[0016] The counterweight 8 is supported by the upper revolving body 4 behind the machine room 7. The counterweight 8 is for taking the weight balance with the front working machine 5 and is a heavy object having an arc shape in top view.

[0017] The disassembling machine 1 according to this embodiment is, for example, a working machine installed at a scrap yard at a waste treatment site, and performs operations such as sorting and loading / unloading of scrap. Therefore, by providing the cab 6 on the upper revolving body 4 supported at the upper end of the post 3, there is an advantage that the disassembling machine 1 can be operated while overlooking from a high position. On the other hand, the operator cannot directly board the upper revolving body 4 at a high position.

[0018] Therefore, the disassembling machine 1 further includes a lower deck 9a and an upper deck 9b, and a lower staircase 10a and an upper staircase 10b for the operator to move up and down on the upper revolving body 4. The basic structure 2, the post 3, the upper revolving body 4, and the decks 9a and 9b are an example of a vehicle body.

[0019] The lower deck 9a is provided around the post 3 in the middle of the post 3 in the vertical direction. The upper deck 9b is provided around the upper revolving body 4 (in the left and right directions in this embodiment). The lower deck 9a and the upper deck 9b are composed of a scaffold for the operator to move up and down on the upper revolving body 4 and for performing maintenance (such as inspection, cleaning, parts replacement, etc.) of the disassembling machine 1, and a handrail erected on the outer periphery of the scaffold. Also, the lower staircase 10a connects the ground and the lower deck 9a, and the upper staircase 10b connects the lower deck 9a and the upper deck 9b.

[0020] Also, as shown in FIG. 2, a pair of rails 11a and 11b are laid on the scaffold of the upper deck 9b. The pair of rails 11a and 11b are spaced apart by a predetermined interval in the left-right direction, and each extends in the front-rear direction. However, the extending direction of the pair of rails 11a and 11b is not limited to the above example. And the pair of rails 11a and 11b support the air compressor 12 so as to be movable in the front-rear direction.

[0021] The air compressor 12 generates compressed air for cleaning the upper swivel body 4. That is, the operator can blow off the dirt adhering to the surface of the upper swivel body 4 by injecting compressed air from the injection nozzle connected to the air compressor 12 toward the upper swivel body 4 on the upper deck 9b.

[0022] As shown in FIG. 2, the air compressor 12 is fixed to the rear ends of the pair of rails 11a and 11b during the operation of the disassembler 1. However, if the air compressor 12 is arranged at the position shown in FIG. 2, the opening / closing door 7a cannot be opened. Therefore, the air compressor 12 is configured to be movable in the front-rear direction along the pair of rails 11a and 11b by wheels 12a and 12b (see FIG. 3). And the pair of rails 11a and 11b are provided with a stopper device 20 (see FIG. 3) for fixing and releasing the fixing of the air compressor 12.

[0023] FIG. 3 is a view of the stopper device 20 seen from the rear (the extending direction of the rails 11a and 11b). FIG. 4 is a perspective view of the stopper device 20 provided on the rail 11a. FIGS. 5 to 7 are side views of the stopper device 20 seen from the outside of the rail 11a. More specifically, FIG. 5 shows a state where the fixing of the wheel 12a by the stopper device 20 is released. FIG. 6 shows a state where the support shaft 22 overlaps on the second imaginary line L2. FIG. 7 shows a state where the wheel 12a is fixed by the stopper device 20. FIG. 8 is an enlarged view of the main part showing the rotation locus of the fixing block 25. FIG. 9 is a side view of the stopper device 20 seen from the inside of the rail 11a.

[0024] As shown in FIG. 3, the stopper device 20 is provided on each of a pair of rails 11a and 11b. The stopper devices 20 provided on each of the pair of rails 11a and 11b fix and release the wheels 12a and 12b, respectively. Note that the stopper devices 20 are attached to the pair of rails 11a and 11b in opposite directions in the left-right direction (the width direction of the rails 11a and 11b). Therefore, the same reference numerals are given to the components of the stopper devices 20 provided on each of the pair of rails 11a and 11b, and hereinafter, the stopper device 20 attached to the rail 11a will be described.

[0025] As shown in FIGS. 3 to 9, the stopper device 20 mainly includes a wheel stopper 21, a support shaft 22, a lever 23, a wheel receiving portion 24, a fixing block 25, a fixing shaft 26, a rotating shaft 27, a coil spring (biasing member) 28, a position adjusting mechanism 29, and a distance adjusting mechanism 30.

[0026] The wheel 12a, the wheel stopper 21, the wheel receiving portion 24, and the fixing block 25 are arranged on a first virtual line L1 (see FIG. 3) that passes through the center of the rail 11a and extends in the vertical direction. That is, the wheel stopper 21, the wheel receiving portion 24, and the fixing block 25 can contact the wheel 12a. On the other hand, the support shaft 22, the lever 23, the fixing shaft 26, and the rotating shaft 27 are arranged at positions deviating from the first virtual line L1, more specifically, inside the first virtual line L1 (on the side of the rail 11b).

[0027] The wheel stopper 21 is fixed above the rail 11a. And the wheel stopper 21 contacts the wheel 12a that has reached the fixed position (see FIG. 7). That is, the wheel stopper 21 prevents the wheel 12a from moving backward from the fixed position.

[0028] The support shaft 22 is fixed to the rail 11a in front of the wheel stopper 21 (in the direction away from the fixed position) and below the rail 11a. Also, the support shaft 22 extends in the left-right direction (the width direction of the rail 11a). Further, the support shaft 22 protrudes inside the rail 11a (on the side of the rail 11b).

[0029] The lever 23 has a flat outer shape. Also, as shown in FIG. 3, the lever 23 is disposed inside the rail 11a (on the side of the rail 11b). Further, the lever 23 extends over the upper and lower portions of the rail 11a. And the lever 23 is rotatably supported by the support shaft 22 in a state where the thickness direction is directed toward the extending direction of the support shaft 22. Hereinafter, among the rotation directions of the lever 23, the clockwise direction in FIG. 5 is denoted as the "fixing direction", and the counterclockwise direction in FIG. 5 is denoted as the "releasing direction".

[0030] The wheel receiving portion 24 is fixed to the lever 23 in front of the wheel stopper 21. And the wheel receiving portion 24 rotates together with the lever 23. More specifically, the wheel receiving portion 24 is pushed by the wheel 12a moving in the direction approaching the fixed position (i.e., backward), and rotates the lever 23 in the fixing direction. Also, the wheel 12a abuts on the wheel receiving portion 24 before reaching the fixed position (i.e., before abutting on the wheel stopper 21).

[0031] Also, in the rail 11a, a first through hole 13a penetrating in the vertical direction is formed at a position including the rotation locus of the wheel receiving portion 24. And as shown in FIG. 5, when the lever 23 rotates in the releasing direction, the wheel receiving portion 24 protrudes above the rail 11a through the first through hole 13a. Thereby, the wheel receiving portion 24 is disposed on the moving path of the wheel 12a approaching the fixed position. On the other hand, as shown in FIG. 7, when the lever 23 rotates in the fixing direction, a part of the wheel receiving portion 24 is submerged below the rail 11a through the first through hole 13a. Thereby, the wheel receiving portion 24 retracts from the moving path of the wheel 12a.

[0032] As shown in FIGS. 5 to 8, the fixing block 25 is fixed to the lever 23 in front of the wheel receiving portion 24. And the fixing block 25 rotates together with the lever 23. More specifically, the fixing block 25 is pushed by the wheel 12a moving in the direction away from the fixed position (i.e., forward), and rotates the lever 23 in the releasing direction.

[0033] Further, a second through-hole 13b penetrating vertically is formed in the rail 11a at a position including the rotation locus of the fixed block 25. Then, as shown in FIG. 7, when the lever 23 rotates in the fixing direction, the fixed block 25 protrudes above the rail 11a through the second through-hole 13b. Thereby, the fixed block 25 is disposed on the moving path of the wheel 12a away from the fixed position. On the other hand, as shown in FIG. 5, when the lever 23 rotates in the release direction, the fixed block 25 is submerged below the rail 11a through the second through-hole 13b. Thereby, the fixed block 25 retracts from the moving path of the wheel 12a.

[0034] As shown in FIG. 8, the second through-hole 13b is formed to be inclined along the rotation locus (two-dot chain line) of the fixed block 25. In other words, the second through-hole 13b is formed to be inclined rearward with respect to the vertical line. Further, a tapered portion 25a that reduces in thickness toward the downstream side in the fixing direction is formed on the fixed block 25 at the downstream end in the fixing direction and inside the rotation locus. Note that the first through-hole 13a may also be formed to be inclined along the rotation locus of the wheel receiving portion 24.

[0035] As shown in FIGS. 5 to 7, the fixed shaft 26 is fixed to the rail 11a in front of the support shaft 22 and below the rail 11a. Further, the fixed shaft 26 extends in the left-right direction. Furthermore, the fixed shaft 26 protrudes inward (rail 11b side) from the lever 23. The rotation shaft 27 is fixed to the lever 23 behind the support shaft 22. Further, the rotation shaft 27 extends in the left-right direction. Furthermore, the rotation shaft 27 protrudes inward (rail 11b side) from the lever 23. The coil spring 28 has one end connected to the fixed shaft 26 and the other end connected to the rotation shaft 27 inside the lever 23 (rail 11b side).

[0036] The distance D between the fixed shaft 26 and the rotating shaft 27 changes as the lever 23 rotates. More specifically, as shown in FIG. 6, the distance D becomes the largest when the support shaft 22 overlaps with the second virtual line L2 connecting the fixed shaft 26 and the rotating shaft 27. On the other hand, as the lever 23 rotates in the fixing direction or the releasing direction from the state of FIG. 6 (i.e., the second virtual line L2 moves away from the support shaft 22), the distance D gradually decreases.

[0037] In other words, the coil spring 28 is most extended (the tension is the largest) when the support shaft 22 overlaps with the second virtual line L2, and the amount of extension (tension) gradually decreases as the lever 23 rotates in the fixing direction or the releasing direction from the state of FIG. 6 (i.e., the second virtual line L2 moves away from the support shaft 22). The support shaft 22 according to the present embodiment is arranged at the midpoint between the fixed shaft 26 and the rotating shaft 27, or at a position closer to the fixed shaft 26 than the rotating shaft 27 when the support shaft 22 overlaps with the second virtual line L2.

[0038] Also, as shown in FIG. 5, when the rotating shaft 27 rotates in the releasing direction from the state where the support shaft 22 overlaps with the second virtual line L2 (FIG. 6), the coil spring 28 biases the lever 23 in the releasing direction. On the other hand, as shown in FIG. 7, when the rotating shaft 27 rotates in the fixing direction from the state where the support shaft 22 overlaps with the second virtual line L2 (FIG. 6), the coil spring 28 biases the lever 23 in the fixing direction. That is, when the stopper device 20 is viewed from the side in the width direction of the rail 11a, the biasing direction of the lever 23 by the coil spring 28 is reversed as the coil spring 28 passes through the support shaft 22.

[0039] The position adjustment mechanism 29 adjusts the position of the wheel stopper 21 in the extending direction of the rail 11a (i.e., the front-rear direction). As shown in FIGS. 5 to 7 and FIG. 9, the position adjustment mechanism 29 is composed of, for example, a base plate 29a, a bolt 29b, and a nut 29c. The base plate 29a is fixed to the rail 11a behind the fixed position and above the rail 11a. The bolt 29b is screwed into the bolt hole of the base plate 29a and protrudes forward. The nut 29c is screwed onto the bolt 29b. Further, the wheel stopper 21 is attached to the front end of the bolt 29b.

[0040] Then, by loosening the nut 29c, the screwing amount (protrusion amount) of the bolt 29b with respect to the base plate 29a can be adjusted. Thereby, the position of the wheel stopper 21 in the front-rear direction can be adjusted according to the diameter of the wheel 12a. Next, by tightening the nut 29c, the position of the bolt 29b (in other words, the wheel stopper 21) is fixed.

[0041] The distance adjustment mechanism 30 adjusts the distance D between the fixed shaft 26 and the rotating shaft 27. More specifically, the distance adjustment mechanism 30 adjusts the distance D by moving the fixed shaft 26 along the extending direction of the rail 11a. As shown in FIGS. 5 and 9, the distance adjustment mechanism 30 includes, for example, a bracket 30a fixed to the rail 11a, and a pair of bolts 30b, 30c screwed into the bolt holes of the bracket 30a on the opposite side with the fixed shaft 26 interposed therebetween. Further, the fixed shaft 26 is indirectly fixed to the rail 11a by being sandwiched between the tips of the bolts 30b, 30c.

[0042] By increasing the protrusion amount of the bolt 30b and decreasing the protrusion amount of the bolt 30c, the fixed shaft 26 approaches the rotating shaft 27 (that is, the distance D becomes shorter). On the other hand, by decreasing the protrusion amount of the bolt 30b and increasing the protrusion amount of the bolt 30c, the fixed shaft 26 moves away from the rotating shaft 27 (that is, the distance D becomes longer). Thereby, the tension of the coil spring 28 (in other words, the force F required to fix and release the wheel 12a by the stopper device 20) can be adjusted.

[0043] The force F required to fix and release the wheel 12a by the stopper device 20 is derived from the following formula 1. In the following formula 1, k is the elastic coefficient of the coil spring 28, D0 is the natural length of the coil spring 28, and Dmax is the length of the coil spring 28 when the support shaft 22 overlaps on the second virtual line L2. That is, by increasing or decreasing the distance D between the fixed shaft 26 and the rotating shaft 27 by the distance adjustment mechanism 30, the force F when the coil spring 28 passes through the support shaft 22 (that is, the biasing force of the coil spring 28 is reversed) increases or decreases. F = k × (Dmax - D0) ··· (Equation 1)

[0044] Next, with reference to FIGS. 5 to 7, the procedure for fixing and releasing the wheel 12a by the stopper device 20 will be described.

[0045] As shown in FIG. 5, when the wheel 12a is positioned in front of the wheel receiving portion 24, the lever 23 is rotated in the release direction by the biasing force of the coil spring 28 until the coil spring 28 returns to its natural length. That is, in FIG. 5, the coil spring 28 is at its natural length and the lever 23 stops at this position. Then, the wheel receiving portion 24 is positioned above the rail 11a, and the fixing block 25 is immersed below the rail 11a through the second through hole 13b.

[0046] Next, when the operator pushes the air compressor 12 backward, the wheel receiving portion 24 is pushed by the wheel 12a moving in the direction approaching the fixed position, and the lever 23 is rotated in the fixing direction. From the state of FIG. 5 until the second imaginary line L2 overlaps with the support shaft 22, the coil spring 28 biases the lever 23 in the release direction. Also, the biasing force of the coil spring 28 increases as the second imaginary line L2 approaches the support shaft 22. Therefore, the operator needs to push the air compressor 12 backward with a certain amount of force.

[0047] When the operator further pushes the air compressor 12 backward, as shown in FIG. 6, the second imaginary line L2 overlaps with the support shaft 22. At this time, both the wheel stopper 21 and the fixing block 25 are separated from the wheel 12a. Then, by further rotating the lever 23 in the fixing direction, when the second imaginary line L2 passes through the support shaft 22, the fixing block 25 comes into contact with the wheel 12a from the front side, and the coil spring 28 biases the lever 23 in the fixing direction. On the other hand, at the timing when the fixing block 25 comes into contact with the wheel 12a, the wheel stopper 21 is still separated from the wheel 12a.

[0048] When the second virtual line L2 passes through the support shaft 22 in the fixed direction, the coil spring 28 biases the lever 23 in the fixed direction. Also, the biasing force of the coil spring 28 decreases as the second virtual line L2 moves away from the support shaft 22. As a result, the wheel 12a is pushed by the fixed block 25 that rotates together with the lever 23 by the biasing force of the coil spring 28, and moves in a direction approaching the fixed position (wheel stopper 21). Then, the wheel 12a abuts against the wheel stopper 21 before the coil spring 28 returns to its natural length. As a result, as shown in FIG. 7, the stopper device 20 fixes the wheel 12a between the wheel stopper 21 and the fixed block 25.

[0049] In this way, the operator can fix the air compressor 12 with the stopper device 20 just by pushing the air compressor 12 backward. Also, in FIG. 7, the coil spring 28 biases the lever 23 (in other words, the fixed block 25) in the fixed direction. Furthermore, the biasing force of the coil spring 28 increases as the second virtual line L2 approaches the support shaft 22 (in other words, as the lever 23 rotates in the release direction). Therefore, the fixing of the wheel 12a by the stopper device 20 is not released by the vibration generated by the driving of the disassembling machine 1.

[0050] On the other hand, when the operator releases the fixing of the wheel 12a by the stopper device 20, the operator pushes the air compressor 12 forward against the biasing force of the coil spring 28 in the state of FIG. 7. As a result, the fixed block 25 is pushed by the wheel 12a moving away from the fixed position, and rotates the lever 23 in the release direction. Until the second virtual line L2 overlaps the support shaft 22 from the state of FIG. 7, the coil spring 28 biases the lever 23 in the fixed direction. Also, the biasing force of the coil spring 28 increases as the second virtual line L2 approaches the support shaft 22. Therefore, the operator needs to push the air compressor 12 forward with a certain amount of force.

[0051] As shown in FIG. 6, when the second virtual line L2 overlaps the support shaft 22, the wheel stopper 21 is separated from the wheel 12a, and the fixed block 25 is in contact with the wheel 12a. By further rotating the lever 23 in the release direction, when the second virtual line L2 passes through the support shaft 22, the wheel receiving portion 24 comes into contact with the wheel 12a from the rear side, and the coil spring 28 biases the lever 23 in the release direction. Further, after the second virtual line L2 passes through the support shaft 22 in the release direction, the fixed block 25 is immersed below the rail 11a through the second through hole 13b.

[0052] When the second virtual line L2 passes through the support shaft 22 in the release direction, the coil spring 28 biases the lever 23 in the release direction. Further, the biasing force of the coil spring 28 decreases as the second virtual line L2 moves away from the support shaft 22. As a result, the wheel 12a is pushed by the wheel receiving portion 24 and moves in a direction away from the fixed position (wheel stopper 21). Further, before the coil spring 28 returns to its natural length, the fixed block 25 is immersed below the rail 11a. As a result, as shown in FIG. 5, the stopper device 20 releases the fixing of the wheel 12a by the fixed block 25. In this way, the operator can release the fixing of the air compressor 12 by the stopper device 20 only by pushing the air compressor 12 forward.

[0053] According to the above embodiment, by simply moving the air compressor 12 along the rail 11a, the fixing and release of the wheel 12a by the stopper device 20 can be switched. Further, since the biasing force of the coil spring 28 increases as the second virtual line L2 approaches the support shaft 22, it is possible to prevent the fixing of the wheel 12a by the stopper device 20 from being unintentionally released due to the vibration during the driving of the disassembling machine 1. As a result, on the upper deck 9b, the air compressor 12 can be reliably fixed during the driving of the disassembling machine 1, and the operation of the operator for fixing and releasing can be simplified.

[0054] Further, according to the above embodiment, by adjusting the position of the wheel stopper 21 by the position adjusting mechanism 29, it is possible to appropriately fix the air compressor 12 even if the diameter of the wheel 12a is different.

[0055] Also, according to the above embodiment, by adjusting the distance D between the fixed shaft 26 and the rotating shaft 27 by the distance adjustment mechanism 30, the force for switching between fixing and releasing the wheel 12a by the stopper device 20 (in other words, the force F required for the second virtual line L2 to pass through the support shaft 22) can be adjusted. Note that the force F for switching between fixing and releasing the wheel 12a by the stopper device 20 can also be adjusted by replacing the coil springs 28 having different spring constants k.

[0056] Also, according to the above embodiment, by forming the second through hole 13b to be inclined along the rotation locus of the fixed block 25 and forming the tapered portion 25a on the fixed block 25, the opening area of the second through hole 13b on the upper surface of the rail 11a can be reduced. As a result, the resistance when the wheel 12a passes through the second through hole 13b can be reduced.

[0057] [Modification Example] With reference to FIGS. 10 and 11, the disassemblers 1A and 1B according to the modification example will be described. FIG. 10 is a perspective view of the disassembler 1A in which the air compressor 12 is installed on the lower deck 9a. FIG. 11 is a perspective view of the disassembler 1B including the lower traveling body 2A. Note that a detailed description of the common points with the above embodiment will be omitted, and the description will focus on the differences.

[0058] The disassembler 1A shown in FIG. 10 is different from the above embodiment in that the rails 11a and 11b and the air compressor 12 are installed on the lower deck 9a, and the extending directions of the rails 11a and 11b are inclined with respect to the front-rear direction. That is, the installation positions of the rails 11a and 11b and the air compressor 12 are not limited to the upper deck 9b. As another example, the rails 11a and 11b and the air compressor 12 may be installed on the upper surface of the upper swing body 4 (for example, the upper surface of the machine room 7).

[0059] The disassembling machine 1B shown in Fig. 11 is different from the above-described embodiment in that the rails 11a, 11b and the air compressor 12 are installed on the lower deck 9a, the rails 11a, 11b extend in the left-right direction, and the lower traveling body 2A is provided instead of the basic structure 2. The lower traveling body 2A travels the disassembling machine 1B by rotating the crawler by the driving force of a traveling motor (not shown). That is, the stopper device 20 according to the present invention is applicable not only to the stationary working machine shown in Figs. 1 and 10 but also to the self-propelled working machine shown in Fig. 11.

[0060] The above-described embodiments are examples for explaining the present invention, and are not intended to limit the scope of the present invention only to those embodiments. Those skilled in the art can implement the present invention in various other modes without departing from the gist of the present invention.

Explanation of reference numerals

[0061] 1, 1A, 1B Disassembling machine 2 Basic structure 2A Lower traveling body 3 Post 4 Upper revolving body 5 Front working machine 5a Boom 5b Arm 5c Grapple 5d, 5e, 5f Hydraulic cylinder 6 Cab 7 Machinery room 7a, 7b Opening / closing door 8 Counterweight 9a Lower deck 9b Upper deck 10a Lower staircase 10b Upper staircase 11a, 11b Rail 12 Air compressor 12a, 12b Wheel 13a First through hole 13b Second through hole 20 Stopper device 21 Wheel stopper 22 Support shaft 23 Lever 24 Wheel support part 25 Fixed block 25a Taper part 26 Fixed shaft 27 Rotating shaft 28 Coil spring 29 Position adjustment mechanism 29a Base plate 29b, 30b, 30c Bolts 29c Nut 30 Distance adjustment mechanism 30a Bracket

Claims

1. A vehicle body, a rail extending on the vehicle body, and a working machine including an air compressor configured to be movable on the rail by wheels and generate compressed air for cleaning the vehicle body. In the working machine, a wheel stopper that abuts on the wheel that has reached a fixed position on the rail, a support shaft extending in the width direction of the rail, a lever rotatably supported by the support shaft, a wheel receiving portion fixed to the lever and pushed by the wheel moving in a direction approaching the fixed position to rotate the lever in the fixing direction, a fixed block fixed to the lever and pushed by the wheel moving in a direction away from the fixed position to rotate the lever in a release direction opposite to the fixing direction, a fixed shaft fixed to the rail, a rotation shaft fixed to the lever at a position different from the support shaft, and a stopper device having a biasing member with one end connected to the fixed shaft and the other end connected to the rotation shaft. The stopper device, by the biasing member rotated in the fixing direction from a state where the support shaft overlaps an imaginary line connecting the fixed shaft and the rotation shaft, biases the lever in the fixing direction to fix the wheel between the wheel stopper and the fixed block, and by the biasing member rotated in the release direction from a state where the support shaft overlaps the imaginary line, biases the lever in the release direction to release the fixing of the wheel by the fixed block. A working machine characterized by this.

2. In the working machine according to claim 1, a position adjusting mechanism for adjusting the position of the wheel stopper in the extending direction of the rail is provided. A working machine characterized by this.

3. In the working machine according to claim 1, a distance adjusting mechanism for adjusting the distance between the fixed shaft and the rotation shaft is provided. A working machine characterized by this.

4. In the working machine according to claim 1, a through hole penetrating in the vertical direction is formed in the rail so that the fixed block protrudes and retracts as the lever rotates, and the through hole is formed to be inclined along the rotation locus of the fixed block. A working machine characterized by this.

5. In the working machine according to claim 4, a tapered portion that reduces in thickness toward the downstream side in the fixing direction is formed on the fixed block at the downstream end in the fixing direction and inside the rotation locus. A working machine characterized by this. ​

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