Work equipment

Abstract

To provide a work device that improves access to the prime mover and work equipment. [Solution] The work device 1 comprises a lower frame 30, an upper frame 40, an engine 10, and a pump 20. The lower frame 30 has a pair of edges that face each other in a first direction in a plan view and extend in a second direction that intersects the first direction. The upper frame 40 is fixed so as to connect the pair of edges of the lower frame 30. The engine 10 is mainly positioned on the lower frame 30 on one side of the upper frame 40 in the second direction. The pump 20 is mainly positioned on the lower frame 30 on the other side of the upper frame 40 in the second direction and is operated by the engine 10.

Description

Technical Field

[0001] The present disclosure relates to a working device.

Background Art

[0002] Patent Document 1 discloses a working device. This working device is a washing machine and includes an engine and a plunger pump driven by the engine. The engine and the plunger pump are fixed to a gantry, and the gantry is fixed between the lower parts of a pair of square frames.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a working device having a prime mover and a working machine such as an engine and a plunger pump, the prime mover and the working machine may be configured to be surrounded by a frame. In this case, for example, it is conceivable that the access from the outside to the prime mover and the working machine is poor and the maintainability is reduced.

[0005] An object of the present disclosure is to provide a working device that improves the accessibility to a prime mover and a working machine.

Means for Solving the Problems

[0006] One example of a working apparatus comprises a lower frame (30), an upper frame (40), a prime mover (10), and a working machine (20). The lower frame (30) has a pair of edges that face each other in a first direction in a plan view and extend in a second direction that intersects the first direction. The upper frame (40) is fixed to connect the pair of edges of the lower frame (30). The prime mover (10) is mainly positioned on the lower frame (30) on one side of the upper frame (40) in the second direction. The working machine (20) is mainly positioned on the lower frame (30) on the other side of the upper frame (40) in the second direction and is operated by the prime mover (10).

[0007] In the above-described work apparatus, the lower frame (30) on which the prime mover (10) and the work implement (20) are arranged can be divided into one area on the second side and the other area on the second side, with respect to the upper frame (40). Since the prime mover (10) is arranged in one area on the second side and the work implement (20) is arranged in the other area on the second side, the upper frame (40) is less likely to get in the way when accessing either the prime mover (10) or the work implement (20). Therefore, accessibility to the prime mover (10) and the work implement (20) is improved.

[0008] One example of a working device may further include a support frame (50) extending in a first direction. The lower frame (30) may be formed in the shape of a plate. The support frame (50) may be fixed to the plate surface of the lower frame (30). In this configuration, the rigidity of the plate-shaped lower frame (30) can be increased by the support frame (50).

[0009] The upper end of the upper frame (40) may be provided with an upwardly projecting projection (44). The support frame (50) may define an insertion area (52) through which the projection (44) of the lower work device is inserted when the work devices are stacked vertically. In this configuration, the engagement of the projection (44) with the insertion area (52) suppresses lateral displacement of the stacked work devices.

[0010] The support frame (50) may be composed of a pair of rod-shaped bodies (51) spaced apart from each other in a second direction. The insertion region (52) may be formed between the pair of rod-shaped bodies (51). In this configuration, a projection (44) is inserted between the pair of rod-shaped bodies (51).

[0011] Each of the pair of rod-shaped bodies (51) may have a circular cross-section. In this configuration, it is easy to insert the protruding portion (44) between the pair of rod-shaped bodies (51).

[0012] The support frame (50) may be fixed to the lower surface of the lower frame (30). In this configuration, a pair of rod-shaped bodies (51) can be used as guides when inserting the protruding portion (44) into the insertion area (52).

[0013] One example of a working apparatus is supported by an upper frame (40) and further includes a cover member (60) that covers the prime mover (10) and the working machine (20). In this configuration, the shape of both ends of the cover member (60) in the second direction can be freely designed.

[0014] One example of a working device may further include a support frame (50) fixed to the lower frame (30) and composed of a rod-shaped body (51) extending in a first direction, positioned to overlap with the upper frame (40) in a plan view, and axles (8A, 8B) fixed to the lower frame (30) and extending in the first direction. The upper surface of the cover member (60) may have a flat surface. The axles (8A, 8B) and the rod-shaped body (51) may have the same diameter. In this configuration, the axles (8A, 8B) and the rod-shaped body (51) are in contact with the flat surface of the cover member (60), allowing the working devices to be stacked stably.

[0015] The prime mover (10) may be an engine, and the implement (20) may be a pump. [Effects of the Invention]

[0016] According to the present disclosure, it is possible to provide a working device that improves the accessibility to the prime mover and the working machine.

Brief Description of the Drawings

[0017] [Figure 1] It is a perspective view of an example working device seen from above. [Figure 2] It is a perspective view showing a state where the cover member of an example working device is removed. [Figure 3] It is a plan view showing a state where the cover member of an example working device is removed. [Figure 4] It is a perspective view showing the frame of an example working device. [Figure 5] [Figure 5] It is a side view showing the frame of an example working device. [Figure 6] It is a cross-sectional view showing a state where example working devices are stacked.

Modes for Carrying Out the Invention

[0018]

[0018] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the description of the drawings, the same reference numerals are given to the same elements, and redundant descriptions are omitted. In this specification, terms indicating directions such as "up", "down", "left", "right", "front", and "rear" are based on the state where the working device is installed on a horizontal plane and the normal forward direction of the working device is defined as the front. In each drawing, an XYZ orthogonal coordinate system is drawn as necessary. The positive side of the X-axis direction corresponds to "front", the positive side of the Y-axis direction corresponds to "left", and the positive side of the Z-axis direction corresponds to "up", respectively. In the following embodiments, an example in which the working device according to the present disclosure is applied to a cleaning machine will be described.

[0019] FIG. 1 is a perspective view of a working device of an example as seen from above. FIG. 2 is a perspective view showing a state where the cover member of the working device of an example is removed. FIG. 3 is a plan view showing a state where the cover of the working device of an example is removed. A working device 1 of an example is an engine-type high-pressure washer, and includes an engine 10 (prime mover), a pump 20 (working machine), a lower frame 30, an upper frame 40, a support frame 50, and a cover member 60.

[0020] The engine 10 (see FIG. 2) is, for example, an inclined engine. An engine 10 of an example includes an engine body 11 in which a crankcase and a cylinder protruding obliquely upward from the crankcase are integrally formed, and a fuel tank 12 disposed above the crankcase. The power take-off shaft (not shown) of the engine 10 is along the X-axis direction and protrudes forward from the engine body 11. A fan housing 13 for accommodating a cooling fan is provided at the rear of the engine body 11. A muffler 14 is connected to the cylinder of the engine body 11 via an exhaust pipe. Note that the muffler 14 may be covered by, for example, a shroud 15 (see FIG. 1) fixed to the engine body 11.

[0021] The pump 20 is, for example, a triple plunger pump (reciprocating pump). The crankshaft of the pump 20 is connected to the power take-off shaft of the engine 10 and is driven by the engine 10. The pump 20 sucks a liquid (for example, water, cleaning liquid, etc.) from a water inlet 21 and discharges the liquid from a nozzle gun (both not shown) via a hose connected to a discharge port 22.

[0022] Figure 4 is a perspective view showing the frame of an example work device 1. Figure 5 is a side view showing the frame of an example work device 1. In the work device 1 according to this embodiment, the body frame is composed of a lower frame 30, an upper frame 40, and a support frame 50. The lower frame 30 has a pair of edges 31 that face each other in the Y-axis direction (first direction) in a plan view and extend along the X-axis direction (second direction). In one example, the lower frame 30 is formed in a substantially rectangular plate shape. The length of the lower frame 30 in the front-rear direction is longer than the length in the left-right direction. For example, the lower frame 30 has a plate-shaped bottom wall portion 32 that forms a rectangle in a plan view, a plate-shaped front wall portion 33 that rises from the front end edge of the bottom wall portion 32, a plate-shaped rear wall portion 34 that rises from the rear end edge of the bottom wall portion 32, a plate-shaped left wall portion 35 that rises from the left end edge of the bottom wall portion 32, and a plate-shaped right wall portion 36 that rises from the right end edge of the bottom wall portion 32. The front wall 33, rear wall 34, left wall 35, and right wall 36 are all of the same height and form a frame shape in plan view.

[0023] In one example, the lower frame 30 may be formed by press-forming a single steel plate. The method of manufacturing the frame is not particularly limited. The lower frame 30 may have bolt holes at arbitrary positions for connecting to other parts, etc. In addition, the bottom wall portion 32 of the lower frame 30 may be provided with an inspection opening 37.

[0024] The lower frame 30 is provided with wheels for moving the work device 1. One example of the wheels includes a pair of left and right front wheels 7A and a pair of left and right rear wheels 7B. The pair of front wheels 7A are rotatably mounted at both ends of the axle 8A. The axle 8A is a rod-shaped body along the Y-axis direction, and for example, has a circular cross-section. The axle 8A is fixed to the lower surface of the bottom wall 32 by welding or the like, in front of the center of the lower frame 30 in the front-rear direction. For example, the axle 8A may be positioned in the center in the front-rear direction of the front half of the lower frame 30. The length of the axle 8A is greater than the length of the lower frame 30 in the Y-axis direction. As a result, the pair of front wheels 7A are positioned outside the lower frame 30 in the left-right direction.

[0025] A pair of rear wheels 7B are rotatably mounted at both ends of an axle 8B. The axle 8B is a rod-shaped body along the Y-axis, and for example, has a circular cross-section. The axle 8B is fixed to the lower surface of the bottom wall 32 by welding or the like, at a point rearward from the center of the lower frame 30 in the front-rear direction. For example, the axle 8B may be positioned in the center of the rear half of the lower frame 30 in the front-rear direction. The length of the axle 8B is greater than the length of the lower frame 30 in the Y-axis direction. As a result, the pair of rear wheels 7B are positioned outside the lower frame 30 in the left-right direction. A brake lever 9 capable of restricting the rotation of the rear wheels 7B is attached to the outer surface of the left wall 35 of the lower frame 30.

[0026] The upper frame 40 is fixed to connect a pair of edges 31 of the lower frame 30. That is, the upper frame 40 is provided to connect the left wall 35 and the right wall 36 with a gap between it and the bottom wall 32. One example of the upper frame 40 has a gate-like shape and includes a left support 41 connected to the left wall 35, a right support 42 connected to the right wall 36, and a beam 43 connecting the left support 41 and the right support 42. Both the left support 41 and the right support 42 are made of steel with a U-shaped cross-section (so-called channel steel) and extend in the Z-axis direction. The lower end of the left support 41 is fixed to the inner surface of the left wall 35. The lower end of the right support 42 is fixed to the inner surface of the right wall 36. This fixing is done, for example, by fastening members such as bolts and nuts. That is, the web of the channel steel and the wall of the lower frame 30 are fastened together by the fastening members.

[0027] The left support column 41 and the right support column 42 face each other in the Y-axis direction. That is, in the X-axis direction, the left support column 41 and the right support column 42 are located at the same position. The left support column 41 and the right support column 42 are located in the X-axis direction at positions other than both ends of the left wall section 35 and the right wall section 36. That is, the left support column 41 and the right support column 42 are located in the central part of the left wall section 35 and the right wall section 36. In the illustrated example, the left support column 41 and the right support column 42 are located approximately in the center of the left wall section 35 and the right wall section 36 in the X-axis direction.

[0028] The beam section 43 spans the upper end of the left support 41 and the upper end of the right support 42. One example of the beam section 43 is channel steel. For example, both ends of the beam section 43 are positioned between a pair of flanges of channel steel forming the left support 41 and the right support 42, and are welded to the left support 41 and the right support 42, respectively. The upper surface of the web of the beam section 43 is provided with upwardly projecting suspension hooks 44 (projections). The suspension hooks 44 are U-shaped, with both ends connected to the web, and extend in the Y-axis direction in a plan view. The suspension hooks 44 are located at the center of the beam section 43 in the X-axis and Y-axis directions. Ideally, the suspension hooks 44 are positioned at the center of gravity of the work device 1 in the front-rear and left-right directions. The entire work device 1 can be moved, transported, or stored by attaching a lifting device (not shown) to the suspension hooks 44 and suspending the work device 1.

[0029] The upper frame 40 divides the lower frame 30 into a first region R1 in front of the upper frame 40 and a second region R2 behind the upper frame 40 in a plan view. In this case, the pump 20 is mainly located in the first region R1 on the lower frame 30, and the engine 10 is mainly located in the second region R2 on the lower frame 30. The engine 10 and the pump 20 may be fixed to the bottom wall 32 by fastening members such as bolts and nuts. Note that "mainly located" means that it is clearly possible to determine whether the location of the object belongs to the first region R1 or the second region R2, for example, when 80% or more of the object belongs to one region in a plan view.

[0030] The support frame 50 is provided on the lower frame 30. In one example, the support frame 50 is a long body extending in the Y-axis direction and is fixed to the plate surface of the bottom wall portion 32 of the lower frame 30 by welding or the like. The support frame 50 is provided so as to traverse the bottom wall portion 32 from the edge connected to the left wall portion 35 to the edge connected to the right wall portion 36. In this embodiment, the support frame 50 is composed of a pair of rod-shaped bodies 51 spaced apart from each other in the X-axis direction. The pair of rod-shaped bodies 51 have the same shape as each other. In one example, the pair of rod-shaped bodies 51 have a circular cross-section, similar to the axles 8A and 8B. The axles 8A and 8B and the rod-shaped bodies 51 have the same diameter and are both fixed to the lower surface of the bottom wall portion 32.

[0031] The support frame 50 is positioned to overlap the upper frame 40 in a plan view. In the X-axis direction, the size L1 of the gap between the pair of rod-shaped bodies 51 is larger than the width L2 of the suspension hook 44. The width L2 of the suspension hook 44 in the X-axis direction corresponds to the diameter of the round bar that forms the suspension hook 44. Also, in the X-axis direction, the size L1 of the gap between the pair of rod-shaped bodies 51 is smaller than, for example, the width L3 of the upper frame 40. In one example, the size L1 of the gap between the pair of rod-shaped bodies 51 may be only slightly larger than the width L2 of the suspension hook 44. In a plan view, one of the pair of rod-shaped bodies 51 is located in front of the suspension hook 44, and the other of the pair of rod-shaped bodies 51 is located behind the suspension hook 44.

[0032] At the center in the Y-axis direction, the gap between the pair of rod-shaped bodies 51 overlaps with an opening 37 provided in the bottom wall portion 32 of the lower frame 30. As a result, an insertion region 52 is formed between the pair of rod-shaped bodies 51 in the central region in the Y-axis direction. In the illustrated example, the insertion region 52 is defined by the pair of rod-shaped bodies 51 and the opening 37 formed in the bottom wall portion 32 of the lower frame 30. The opening 37 in the illustrated example has a shape in which a rectangular area necessary for inspection and a small rectangular area necessary for defining the insertion region 52 are connected.

[0033] The cover member 60 is a component for suppressing the leakage of operating noise from the engine 10 and the pump 20. The cover member 60 is supported by the lower frame 30 and covers the engine 10 and the pump 20. One example of the cover member 60 includes a peripheral wall 61 surrounding the engine 10 and the pump 20 and a top wall 62 covering the top of the engine 10 and the pump 20. In the illustrated example, a hole 63 is formed in the top wall 62 through which a suspension hook 44 is inserted. Therefore, the suspension hook 44 is exposed to the outside of the cover member 60. The peripheral wall 61 follows the front wall 33, rear wall 34, left wall 35, and right wall 36 of the lower frame 30, respectively. An opening 64 facing the pump 20 is formed at the front of the peripheral wall 61 formed along the front wall 33. The cover member 60 is fixed to both ends of the front wall 33 and rear wall 34 of the lower frame 30 in the Y-axis direction by fixing screws.

[0034] The top wall 62 (upper surface) of the cover member 60 includes a central portion 65 located in the center in the X-axis direction, a front portion 66 located in front of the central portion 65, and a rear portion 67 located behind the central portion 65. The central portion 65 is rectangular in shape and lies along a horizontal plane. That is, the upper surface of the central portion 65 is a horizontal, flat surface. The central portion 65 is provided with a lid 68 that can be opened and closed, for example, in a position that overlaps with the fuel tank 12. The front end of the central portion 65 is located in front of the axle 8A that supports the front wheel 7A. The rear end of the central portion 65 is located behind the axle 8B that supports the rear wheel 7B. The front portion 66 is rectangular in shape and slopes downward toward the front from the front edge of the central portion 65. The rear portion 67 is rectangular in shape and slopes downward toward the rear from the rear edge of the central portion 65.

[0035] The work device 1 according to this embodiment can be stacked in two or three or more layers, and this configuration reduces the storage space required for the work device 1. Figure 6 is a cross-sectional view showing an example of work devices stacked in two layers. The insertion area 52 is the area through which the lifting hook 44 of the lower work device 1 is inserted when the work devices 1 are stacked. By inserting the lifting hook 55 into the insertion area 52, displacement of the stacked work devices 1 is suppressed.

[0036] When the work devices 1 are stacked, the axles 8A and 8B and support frame 50 of the upper work device 1 come into contact with the central portion 65 of the cover member 60 of the lower work device 1. In addition, the lifting hook 44 of the lower work device 1 passes through the gap between the pair of rod-shaped bodies 51 that make up the support frame 50 of the upper work device 1 and is inserted into the insertion area 52.

[0037] As described above, one example of a working device 1 comprises a lower frame 30, an upper frame 40, an engine 10, and a pump 20. The lower frame 30 has a pair of edges 31 that face each other in the Y-axis direction and extend in the X-axis direction in a plan view. The upper frame 40 is fixed so as to connect the pair of edges 31 of the lower frame 30. The engine 10 is mainly positioned on the lower frame 30 on one side in the X-axis direction relative to the upper frame 40. The pump 20 is mainly positioned on the lower frame 30 on the other side in the X-axis direction relative to the upper frame 40 and is operated by the engine 10.

[0038] In the above-described work apparatus 1, there are no support columns or other structures at the four corners of the lower frame 30. Furthermore, with respect to the upper frame 40, the lower frame 30 can be divided into a first region R1 on one side in the X-axis direction and a second region R2 on the other side. Since the engine 10 is located in the first region R1 and the pump 20 is located in the second region R2, the upper frame 40 does not easily get in the way when accessing either the engine 10 or the pump 20. Therefore, accessibility to the engine 10 and the pump 20 is improved. This makes it easier to perform pressure adjustment of the pump 20, engine throttle adjustment, and various maintenance tasks. In addition, the upper frame 40 has a structure that connects a pair of edges 31 of the lower frame 30. Therefore, the upper frame 40 can be easily attached to the lower frame 30.

[0039] One example of the working device 1 includes a support frame 50 extending in the Y-axis direction. The lower frame 30 may be formed in the shape of a plate. The support frame 50 may be fixed to the plate surface of the lower frame 30 at a position that overlaps with the upper frame 40 in a plan view. In this configuration, the plate-shaped lower frame 30 is reinforced by the support frame 50. In particular, in this example, the axles 8A and 8B are also fixed to the plate surface of the lower frame 30, so the lower frame 30 can be further reinforced. Because the rigidity of the lower frame 30 can be increased by the support frame 50, it becomes possible to reduce the plate thickness of the lower frame 30.

[0040] An upwardly projecting lifting hook 44 may be provided at the upper end of the upper frame 40. The support frame 50 may define an insertion area 52 through which the lifting hook 44 of the lower work device 1 is inserted when the work devices 1 are stacked vertically. In this configuration, the engagement of the lifting hook 44 with the insertion area 52 suppresses lateral displacement of the stacked work devices 1. Damage to the lower frame 30 is suppressed because the insertion area 52 is defined by the support frame 50.

[0041] The support frame 50 may be composed of a pair of rod-shaped bodies 51 spaced apart from each other in the X-axis direction. The insertion area 52 may be formed between the pair of rod-shaped bodies 51. In this configuration, a suspension hook 44 is inserted between the pair of rod-shaped bodies 51.

[0042] The support frame 50 may be fixed to the lower surface of the lower frame 30. In this configuration, the pair of rod-shaped bodies 51 can be used as guides when inserting the suspension hook 44 into the insertion area 52.

[0043] Each of the pair of rod-shaped bodies 51 may have a circular cross-section. This configuration makes it easy to insert the hanging hook 44 between the pair of rod-shaped bodies 51.

[0044] One example of a working device 1 is supported by an upper frame 40 and includes a cover member 60 that covers the engine 10 and pump 20. In this configuration, since there are no support columns or the like at the four corners of the lower frame 30, the shape of both ends of the cover member 60 in the X-axis direction can be freely designed.

[0045] One example of a working device 1 may include a support frame 50 fixed to the lower frame 30 and composed of a rod-shaped body 51 extending in the X-axis direction, positioned to overlap with the upper frame 40 in a plan view, and axles 8A and 8B fixed to the lower frame 30 and extending in the X-axis direction. The upper surface of the cover member 60 may have a flat surface. The axles 8A and 8B and the rod-shaped body 51 may have the same diameter. In this configuration, the lowest positions of the axles 8A and 8B and the rod-shaped body 51 in the Z-axis direction are the same, so the axles 8A and 8B and the rod-shaped body 51 are in contact with the flat surface of the cover member 60, allowing the working devices 1 to be stacked stably. In addition, since the load on the lower cover member 60 is distributed, the thickness of the cover member 60 can be reduced.

[0046] Although embodiments of the present disclosure have been described above, the present disclosure is not limited to the embodiments described above.

[0047] In the above embodiment, an example was shown where the prime mover is a gasoline engine, but the prime mover can be any device that converts energy into mechanical power, such as an electric motor.

[0048] Furthermore, while an example of a working machine being a pump was given, the working machine can be any device driven by a prime mover, such as a compressor or generator.

[0049] Furthermore, although a cover member having a central portion, a front portion sloping downward from the front end of the central portion, and a rear portion sloping downward from the rear end of the central portion has been shown, the shape of the cover member is not particularly limited. For example, the front and rear portions of the top wall of the cover member may be formed to curve from the central portion.

[0050] Although the above embodiment describes an engine-driven high-pressure washer, this disclosure is not limited to this type of washer and is applicable to other types of washer machines as well. Furthermore, this disclosure is not limited to washer machines.

[0051] Furthermore, while an example of a support frame being constructed from a pair of rod-shaped bodies has been shown, the shape of the support frame is not limited to this. For example, the support frame may have a width approximately the same as the width of the upper frame and may be plate-shaped extending in the Y-axis direction. In this case, the insertion area may be a through-hole penetrating the support frame in the plate thickness direction.

[0052] Embodiments of this disclosure may be shown as follows: [1] A lower frame having a pair of edges that face each other in a first direction in a plan view and extend in a second direction intersecting the first direction, An upper frame fixed to connect the pair of edges of the lower frame, On the lower frame, the prime mover is mainly positioned on one side in the second direction relative to the upper frame, A work device comprising: a work machine which is mainly positioned on the lower frame to the other side in the second direction from the upper frame and is operated by the prime mover. [2] Further including a support frame extending in the first direction, The lower frame is formed in a plate shape, The work apparatus according to [1], wherein the support frame is fixed to the plate surface of the lower frame. [3] The upper end of the upper frame is provided with an upwardly protruding projection. The work device according to [2], wherein the support frame defines an insertion area through which the protruding portion of the lower work device is inserted when the work devices are stacked vertically. [4] The support frame is composed of a pair of rod-shaped bodies spaced apart from each other in the second direction, The insertion region is formed between the pair of rod-shaped bodies, as described in [3]. [5] The work apparatus according to [4], wherein the support frame is fixed to the lower surface of the lower frame. [6] The working device according to [4] or [5], wherein each of the pair of rod-shaped bodies has a circular cross-section. [7] The work apparatus according to any one of [1] to [6], further comprising a cover member that covers the prime mover and the work machine. [8] In a plan view, at a position overlapping with the upper frame, a support frame is provided, which is composed of a rod-shaped body extending in the first direction and fixed to the lower frame, The system further includes an axle fixed to the lower frame and extending in the first direction, The upper surface of the cover member has a flat surface. The working device according to [7], wherein the axle and the rod-shaped body have the same diameter. [9] The aforementioned prime mover is an engine, The aforementioned work machine is a pump, or a work device as described in any of [1] to [8]. [Explanation of Symbols]

[0053] 1...Working device, 10...Engine (prime mover), 20...Pump (working machine), 30...Lower frame, 40...Upper frame, 50...Support frame, 60...Cover member.

Claims

1. A lower frame (30) having a pair of edges that face each other in a first direction in a plan view and extend in a second direction intersecting the first direction, An upper frame (40) is fixed to connect the pair of edges of the lower frame (30), On the lower frame (30), the prime mover (10) is mainly positioned on one side in the second direction relative to the upper frame (40), A work device comprising: a work machine (20) which is mainly positioned on the lower frame (30) on the other side in the second direction from the upper frame (40), and which is operated by the prime mover (10).

2. The system further includes a support frame (50) extending in the first direction, The lower frame (30) is formed in a plate shape, The work apparatus according to claim 1, wherein the support frame (50) is fixed to the plate surface of the lower frame (30).

3. The upper end of the upper frame (40) is provided with an upwardly projecting projection (44), The work device according to claim 2, wherein the support frame (50) defines an insertion area (52) through which the protruding portion (44) of the lower work device is inserted when the work devices are stacked vertically.

4. The support frame (50) is composed of a pair of rod-shaped bodies (51) spaced apart from each other in the second direction. The work apparatus according to claim 3, wherein the insertion region (52) is formed between the pair of rod-shaped bodies (51).

5. The work apparatus according to claim 4, wherein the support frame (50) is fixed to the lower surface of the lower frame (30).

6. The work apparatus according to claim 5, wherein each of the pair of rod-shaped bodies (51) has a circular cross-sectional shape.

7. The work apparatus according to any one of claims 1 to 6, further comprising a cover member (60) that covers the prime mover (10) and the work implement (20).

8. In a plan view, the support frame (50) is composed of a rod-shaped body (51) extending in the first direction and fixed to the lower frame (30) at a position overlapping with the upper frame (40), The system further includes axles (8A, 8B) fixed to the lower frame (30) and extending in the first direction, The upper surface of the cover member (60) has a flat surface. The working device according to claim 7, wherein the axles (8A, 8B) and the rod-shaped body (51) have the same diameter.

9. The prime mover (10) is an engine, The work apparatus according to claim 1, wherein the work machine (20) is a pump.

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