Wheeled chassis

Abstract

To provide a housing body with wheel with excellent workability.SOLUTION: The present invention has a housing body 48 having a first side surface formed by a side frame piece 11, a closing side support 21, and a door side support 24, a second side surface formed by a side frame piece 12, a closing side support 22, and a door side support 23, a rear end surface formed by both of the closing side supports 21 and 22 and a closing frame piece 13, and a door surface. Swing arms 58 and 59 are swingably provided on the housing body 48. A swing side wheel 62 is provided on the swing arm 58 and is movable by the swing arm between a running position in which the swing arm projects downwardly from the housing body and a retracted position in which the swing arm does not project below the housing body. A fulcrum side wheel 55 is provided on the housing body, which supports the housing body in a movable manner together with the swing side wheel when the swing side wheel 62 is in the running position.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a wheeled housing that can be switched between a stationary state and a mobile state. [Background technology]

[0002] When manually transporting cargo at a construction site or the like, a hand-pushed transport cart equipped with wheels is used, as described in Patent Document 1. Such a transport cart has a loading platform, and cargo is placed directly on the loading platform and transported manually. Since the loading platform does not have side walls to prevent the cargo from falling off, there is a limit to the amount of cargo that can be loaded onto the loading platform.

[0003] If cargo is stored in a rectangular parallelepiped housing, the side walls of the housing support the cargo, allowing a large amount of cargo to be stored inside the housing. However, loading such a housing onto a hand-pushed transport cart takes time, making it difficult to transport the goods efficiently.

[0004] Meanwhile, at construction sites and the like, in order to cover an opening and ensure the safety of workers, an opening protection frame made of a housing is provided around the opening, as described in Patent Document 2. This opening protection frame has multiple support posts erected around the opening and multiple extendable handrail bars connecting the support posts, and is assembled to surround the opening.

[0005] At civil engineering and construction sites, as described in Patent Document 2, an opening protection frame, which is a housing made up of posts and handrail bars, is placed on the ground surface to cover the opening. The top of the housing is open, and the side walls made up of multiple handrails allow the opening to be visually observed from outside. On the other hand, as a housing for retrieving luggage, or transported goods, the open top allows the transported goods to be loaded from the top. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-205656 [Patent Document 2] Japanese Utility Model Application Publication No. 7-42799 Summary of the Invention [Problem to be solved by the invention]

[0007] As in Patent Document 2, by surrounding the opening with a protective frame formed by four posts and handrail bars, workers can be prevented from falling through the opening into the pit. However, with prefabricated protective frames, the components must be transported to the site and assembled around the opening, which poses a problem of poor workability in installing the protective frame.

[0008] On the other hand, if the luggage is stored in a fixed housing and then transported by a handcart, the luggage cannot be transported efficiently as described above.

[0009] An object of the present invention is to provide a wheeled housing that is easy to use. [Means for solving the problem]

[0010] The wheeled housing of the present invention comprises a base frame body having first and second side frame pieces parallel to each other and a closing frame piece connected to one end of each of the side frame pieces; a first side surface formed by the first side frame piece, a first closing side support pillar erected at one end of the first side frame piece, and a first door side support pillar erected at the other end; a second side surface formed by the second side frame piece, a second closing side support pillar erected at one end of the second side frame piece, and a second door side support pillar erected at the other end; and a side wall formed by the first closing side support pillar, the second closing side support pillar, and the closing frame piece. and a door surface that is attached to one of the first and second door-side posts so as to be able to open and close freely, a swing arm is provided on the housing body so as to be able to swing freely, a swing-side wheel is provided on the swing arm and moves between a running position in which the swing arm projects downwardly from the housing body and a retracted position in which the swing arm does not project downwardly from the housing body, and a fulcrum-side wheel is provided on the housing body so as to support the housing body so as to be able to run freely together with the swing-side wheel when the swing-side wheel is in the running position, and the housing body is able to run freely by the swing-side wheel and the fulcrum-side wheel. The base frame is provided with a mounting frame to which a ladder to be placed in a pit at a construction site is attached, and the mounting frame covers the periphery of the opening of the pit with the housing main body. A detachable bottom wall member is placed on the mounting frame, and the bottom wall member and the housing main body form a space to accommodate transported items, while the bottom wall member can be removed to cover the opening of the pit with the housing main body. [Effects of the Invention]

[0011] The housing has a main body that is placed on the base surface, and by operating the swing arm, the main body can be supported by wheels so that it can move freely, and the swing arm can be used to move the main body. If the main body is used as a protective frame that covers the pit opening, i.e., a pit guard, the main body can be easily transported to the pit location and can be easily transported and removed after work is completed. On the other hand, the main body can also be used as a transport cart to store and transport cargo. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view showing a pit guard as an example of a wheeled housing of the present invention, with the housing body mounted on a base surface. [Figure 2] FIG. 2 is a side view of FIG. [Figure 3]FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 4] FIG. 10 is a side view showing a state in which the housing body is free to move. [Figure 5] FIG. 2 is a plan view showing a base frame of the housing main body. [Figure 6] 10(A) to 10(D) are perspective views showing the mounting position of the ladder relative to the mounting frame provided on the base frame. [Figure 7] FIG. 10 is a plan view showing a base frame in a modified example of the wheeled housing. [Figure 8] 6 is a cross-sectional view showing a portion similar to that of FIG. 5 in a wheeled housing in which a bottom wall member is detachably provided on a base frame provided with a mounting frame. FIG. [Figure 9] 4 is a cross-sectional view showing a portion similar to that of FIG. 3 in a wheeled housing in which a bottom wall member is attached to a base frame. DETAILED DESCRIPTION OF THE INVENTION

[0013] An embodiment of the present invention will be described in detail below with reference to the drawings. Figures 1 to 5 show a pit guard 10a as an example of a wheeled housing of the present invention, and Figures 1 to 3 show the pit guard 10a placed on a base surface B so as to cover the periphery of the opening of a pit P, such as a manhole at a construction site.

[0014] As shown in FIG. 5, the pit guard 10a has a base frame 14 formed by two parallel side frame pieces, first and second, 11 and 12, and a closing frame piece 13 connected between one end of the first side frame piece 11 and one end of the second side frame piece 12. Mounting brackets 15-18 are fixed to both ends of each of the side frame pieces 11 and 12. A first closing support pillar 21 stands upright at one end of the side frame piece 11 and is fixed to the mounting bracket 15. A second closing support pillar 22 stands upright at one end of the second side frame piece 12 and is fixed to the mounting bracket 16. A first door support pillar 24 stands upright at the other end of the first side frame piece 11 and is fixed to the mounting bracket 18. A second door-side support pillar 23 is erected at the other end of the second side frame piece 12 , and the door-side support pillar 23 is fixed to the mounting bracket 17 .

[0015] 1, the blocking side support pillar 21 and the door side support pillar 24 are connected by a front-to-rear panel frame piece 25, and the blocking side support pillar 22 and the door side support pillar 23 are connected by a front-to-rear panel frame piece 26. The area formed by the blocking side support pillar 21, the door side support pillar 24, and the side frame piece 11 forms a first side surface, and a side panel 27 made of a lattice-like or mesh-like wire mesh is disposed on the first side surface. The side panel 27 is flush with the first side surface and is disposed in an area below the panel frame piece 25.

[0016] The area formed by the blocking-side support pillar 22, the door-side support pillar 23, and the side frame piece 12 forms the second side surface, and a side panel 28 made of a lattice-like or mesh-like wire mesh similar to the side panel 27 is disposed on the first side surface. The side panel 28 is flush with the second side surface and is disposed in an area below the panel frame piece 26.

[0017] The area formed by the first and second blocking side struts 21, 22 and the blocking frame piece 13 forms the rear end surface. As shown in Figure 2, two panel frame pieces 31, 32 are attached above and below between the two blocking side struts 21, 22, and connecting struts 33, 34 are attached to both ends of the panel frame pieces 31, 32. The area formed by the panel frame pieces 31, 32 and connecting struts 33, 34 coincides with the rear end surface, and a rear panel 35 made of a mesh-like wire netting similar to the side panels 27, 28 described above is disposed on the rear end surface.

[0018] A door panel 36, i.e., a door surface, made of a mesh-like wire netting like the side panels 27, 28 and the rear panel 35, is attached to one of the door-side support pillars 24 via hinges 37 so as to be able to open and close freely. The door panel 36 is attached to a quadrilateral frame formed by two upper and lower door frame pieces 41, 42 extending horizontally and two door frame pieces 43, 44 extending vertically between and connected to the upper and lower door frame pieces 41, 42. As shown in FIGS. 2 to 4 , a handle 38 is attached to the upper door frame piece 41 for opening and closing the door panel 36. The door panel 36 opens and closes as shown by arrow C in FIG. 5 , centered on a hinge 37 attached between the door frame piece 43 provided along the door-side support pillar 24 and the door-side support pillar 24. FIG. 5 shows the side panels 27, 28, the rear panel 35, and the door panel 36 arranged above the base frame 14.

[0019] The side panels 27, 28, rear panel 35, and door panel 36 are each made of wire mesh and have transparency that allows them to be viewed from the outside. The panels are not limited to wire mesh, and transparency can also be achieved by using plate material with many through holes formed therein. At least one of the four panels may be made of a transparent material.

[0020] As shown in FIG. 1 , a beam 45 is connected between the upper end of the blocking-side support pillar 21 and the upper end of the door-side support pillar 24, and a beam 46 is connected between the upper end of the blocking-side support pillar 22 and the upper end of the door-side support pillar 23. Four reinforcing bars 47 are connected between the two beams 45, 46, and each reinforcing bar 47 can move along the beams 45, 46. In this manner, a housing main body 48 is formed by the base frame 14, the blocking-side support pillars 21, 22, and the door-side support pillars 23, 24. The housing main body 48 has side panels 27, 28 that form each of the side surfaces, a rear panel 35 that forms the rear end surface, and a door panel 36 that forms the door surface. The surface of the housing main body 48 on which the door panel 36 is provided is the front side, and the surface on which the rear panel 35 is provided is the back side.

[0021] 1, a support beam 51 is provided on the back side of the housing body 48, one end of which is fixed to the closed-side support column 21 by a mounting bracket 52, and the other end of which is fixed to the closed-side support column 22 by a mounting bracket 53. A wheel 55 serving as a fulcrum-side wheel is provided on a bracket 54 attached to the longitudinal center of the support beam 51.

[0022] As shown in FIG. 2, a support plate 56 is fixed to side frame piece 11, and as shown in FIG. 3, a support plate 57 is fixed to side frame piece 12. A swing arm 58 is attached to support plate 56 so as to be swingable about support shaft 60a, and a swing arm 59 is attached to support plate 57 so as to be swingable about support shaft 60b. Each swing arm 59 is disposed outside housing main body 48, and both support shafts 60a, 60b are coaxial. As shown in FIG. 2, a wheel 62 serving as a swing-side wheel is provided on bracket 61 attached to the lower end of swing arm 58, and as shown in FIG. 3, a wheel 64 serving as a swing-side wheel is provided on bracket 63 attached to the lower end of swing arm 59.

[0023] As shown in FIG. 1, the upper ends of both swing arms 58, 59 are connected by an operating rod 65, and an operator can swing the swing arms 58, 59 by holding the operating rod 65 in his / her hand. FIGS. 1 to 3 show a state in which the operator has released the operating rod 65 and is not operating it. In this state, the housing body 48 is fixed to the base surface B by its own weight, the swing-side wheels 64 are in a retracted position where they do not protrude below the housing body 48, and the operating rod 65 is positioned above the reinforcing bar 47. On the other hand, as shown in FIG. 4, when the operator holds the operating rod 65 and swings the swing arms 58, 59 to a traveling position in which the swing-side wheels 64 protrude below the housing body 48, the fulcrum-side wheels 55 also come into contact with the base surface B. As a result, the housing body 48 is in an inclined state and is supported by the three wheels 55, 62, and 64, and is lifted above the base surface B, allowing the housing body 48 to travel freely. In this way, the housing body 48 can be set to either an installed state in which it is fixed to the base surface B or a free-moving state in which it moves on the base surface B by the operator operating the swing arms 58, 59 with the operating rod 65.

[0024] As shown in Figure 4, when the oscillating side wheel 64 is in the traveling position, the operating rod 65 is positioned in front of the front of the housing main body 48, and the operator can easily move the housing main body 48 by holding the operating rod 65.

[0025] As shown in Figure 5, when a mounting frame 66 is attached to the base frame 14 of the housing body 48, the wheeled housing can be used as a pit guard 10a. The mounting frame 66 has a horizontal mounting bar 67 that extends parallel to the closing frame piece 13 and connects the side frame pieces 11, 12 to each other, and two vertical mounting bars 68, 69 that connect both ends of the horizontal mounting bar 67 to the closing frame piece 13 to each other.

[0026] When the pit guard 10a is placed on the base surface B so as to cover the periphery of the opening of a pit P at a construction site or the like, a ladder 70 to be placed in the pit P can be attached to the mounting frame 66. This allows workers to use the ladder 70 to enter and exit the pit P while the opening of the pit P is covered by the housing main body 48, ensuring safety. Because the opening of the pit P is completely covered by the housing main body 48, people are prevented from accidentally falling into or approaching the pit P. Furthermore, the side panels 27, 28, rear panel 35, and door panel 36 are formed of a lattice-like wire mesh, allowing the interior to be observed from the outside, enabling visual observation of the pit P from outside the housing main body 48. Each panel may be made of metal or resin, or a plate material with multiple holes, as long as it is transparent.

[0027] The ladder 70 can be attached to the horizontal mounting bar 67 as shown in Figure 6(A), or to the closure frame piece 13 as shown in Figure 6(B). Furthermore, it can be attached to either of the two vertical mounting bars 68, 69 as shown in Figures 6(C) and 6(D). Which one the ladder 70 is attached to can be selected depending on the work location within the pit P and the conditions around the opening of the pit P.

[0028] When work inside the pit P is completed, the housing body 48 can be moved on three wheels to remove it from the opening and easily transported to another work location, as shown in Figure 4. In this way, the pit guard 10a, which is a housing with wheels, can be easily transported, making it easy to install at the pit opening and improving workability.

[0029] FIG. 7 is a plan view showing the base frame 14 of a modified wheeled enclosure used as the pit guard 10a. The side frame pieces 11 of this base frame 14 consist of a closed-end side frame piece 11a and a sliding side frame piece 11b on the door side, with the side frame piece 11b moving freely in the front-to-rear direction along the side frame piece 11a. Similarly, the side frame piece 12 consists of a closed-end side frame piece 12a and a sliding side frame piece 12b on the door side, with the side frame piece 12b moving freely in the front-to-rear direction along the side frame piece 12a. A door frame piece 43 is attached to the tip of the side frame piece 11b, and a door frame piece 44 is attached to the tip of the side frame piece 12b. The door frame pieces 43, 44 are connected by upper and lower door frame pieces 41, 42.

[0030] A door panel 36 made of a lattice-like wire mesh is attached to the quadrilateral frame formed by the door frame pieces 41-44. Furthermore, the side panel 27 includes a first side panel 27a attached between the blocking side support post 21 and the door side support post 24, and a second side panel 27b arranged from the door frame piece 43 along the side frame piece 11b. Similarly, the side panel 28 includes a first side panel 28a attached between the blocking side support post 22 and the door side support post 23, and a second side panel 28b arranged from the door frame piece 44 along the side frame piece 12b. Furthermore, the rear panel 35 is attached to the blocking side support posts 21 and 22 in the same manner as described above.

[0031] In this way, the pit guard 10a shown in Figure 7 has a housing body 48 formed by a first housing body 48a equipped with a rear panel 35 and a second housing body 48b equipped with a door panel 36, and the second housing body 48b is slidable relative to the first housing body 48a.

[0032] The pit guard 10a shown in Figure 7 is a sliding type, meaning that the size of the internal space of the housing main body 48 can be changed by sliding the sliding door-side side frame pieces 11b, 12b relative to the closed end side frame pieces 11a, 12a. Figure 7 shows the state in which the internal space is maximized, and the internal space can be reduced by moving the door panel 36 closer to the rear panel 35. The size of the internal space can be changed depending on the amount of tools to be placed at the opening of the pit P.

[0033] Figure 8 is a cross-sectional view showing a wheeled housing in which a bottom wall member 71 is detachably mounted on a base frame 14 provided with a mounting frame 66, and shows the same part of the base frame 14 as in Figure 5. This wheeled housing is a dual-purpose pit guard 10b that can be used both as a pit guard and as a luggage transport vehicle.

[0034] As shown in FIG. 8, a mounting frame 66 is provided on the base frame 14, and similar to the case shown in FIG. 6, a ladder 70 can be attached to the mounting frame 66 to allow workers to enter and exit the pit P. However, FIG. 8 shows the ladder 70 removed. A bottom wall member 71 made of a lattice-like wire mesh is detachably disposed on the base frame 14. Therefore, when the bottom wall member 71 is disposed on the mounting frame 66, this dual-purpose pit guard 10b can store luggage, i.e., transported items, in the internal space surrounded by the housing main body 48 and the bottom wall member 71. In this way, when storing luggage, the ladder 70 is removed.

[0035] When loading an article into the internal space of the housing body 48, the housing body 48 is placed on the base surface B. On the other hand, when a predetermined amount of article is stored in the space of the housing body 48 and the article is to be moved, the worker operates the operating rod 65 to swing the swing arms 58, 59, as in the case shown in Fig. 4. This positions the swing-side wheels 62, 64 in the travel position, and the housing body 48 can be moved by the three wheels 55, 62, 64.

[0036] On the other hand, when using it as a pit guard, the bottom wall member 71 is removed. As a result, the dual-purpose pit guard 10b is placed at the opening of the pit P, similar to the case shown in Figures 1 to 4. In this way, the dual-purpose pit guard 10b can be used as a pit bird and also as a luggage transport vehicle, depending on the conditions of the construction site.

[0037] FIG. 9 is a cross-sectional view showing a wheeled housing according to another embodiment of the present invention, showing a cross section of the same part as in FIG.

[0038] This wheeled enclosure is embodied as a luggage transport vehicle 10c, and the base frame 14 is not provided with a mounting frame 66. Instead, a bottom wall member 71 made of a lattice-like wire mesh is attached to the base frame 14. The planar shape of the bottom wall member 71 has the same structure as that shown in Figure 8. This luggage transport vehicle 10c cannot be used as a pit guard, and the internal space surrounded by the enclosure main body 48 and the bottom wall member 71 is used as a space for storing transported goods.

[0039] As with the dual-purpose pit guard 10b, when transported goods are placed into the space, the housing body 48 is fixed onto the base surface B. On the other hand, when a predetermined amount of transported goods is stored in the space of the housing body 48 and the goods are to be moved, the housing body 48 can be moved by the three wheels 55, 62, 64, as in the case shown in Fig. 8. Because the housing body 48 that stores the goods is provided with wheels, the goods can be stored in the housing so that they come into contact with the panel of the housing body and transported as is, allowing for efficient storage and transportation of goods.

[0040] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention. The side panels 27, 28, rear panel 35, and door panel 36 are each formed of wire mesh, and the interior can be seen from the outside, but each panel may be made of plate material instead of wire mesh, or may have a structure in which rods are arranged in a lattice pattern. [Explanation of symbols]

[0041] 11 Side frame piece 12 Side frame piece 13 Closure frame piece 14 Base frame 21, 22 Closed side strut 23, 24 Door side support 25, 26 Panel frame pieces 27, 28 Side panels 35 Rear Panel 36 Door Panel 41~44 Door frame pieces 48 Housing body 55 Wheel (fulcrum side wheel) 58, 59 Swing arm 62, 64 Wheels (swinging side wheels) 65 Operation rod 66 Mounting frame 70 Ladder 71 Bottom wall member

Claims

1. a base frame body including first and second side frame pieces parallel to each other and a closing frame piece connected to one end of each of the side frame pieces; a first side surface formed by the first side frame piece, a first blocking-side support pillar erected at one end of the first side frame piece, and a first door-side support pillar erected at the other end; a second side surface formed by the second side frame piece, a second blocking-side support pillar erected at one end of the second side frame piece, and a second door-side support pillar erected at the other end; a rear end surface formed by the first blocking side support, the second blocking side support, and the blocking frame piece; a door surface attached to one of the first and second door-side support pillars so as to be able to open and close; a swing arm provided on the housing body so as to be swingable; a swing-side wheel is provided on the swing arm, the swing arm moving between a traveling position where the swing arm projects downwardly from the housing body and a retracted position where the swing arm does not project downwardly from the housing body; a fulcrum-side wheel is provided on the housing body, the fulcrum-side wheel supporting the housing body so as to be freely movable together with the swing-side wheel when the swing-side wheel is in a traveling position; The housing body is movable by the swing-side wheels and the fulcrum-side wheels, The base frame is provided with a mounting frame to which a ladder to be placed in a pit at a construction site is attached, The mounting frame covers the periphery of the opening of the pit with the housing main body, A wheeled enclosure in which a removable bottom wall member is placed on the mounting frame, and the bottom wall member and the enclosure main body form a space for accommodating transported items, while the bottom wall member can be removed and the enclosure main body can cover the opening of the pit.

2. 2. The wheeled housing according to claim 1, wherein a see-through panel is provided on at least one of the first side surface, the second side surface, the rear end surface, and the door surface, allowing the interior to be visually observed from the outside.

3. 2. The wheeled housing according to claim 1, wherein the swing arms are connected to each other by an operating rod, and an operator operates the swing arms by using the operating rod.

4. 2. A wheeled chassis according to claim 1, wherein the mounting frame has a horizontal mounting bar connecting the side frame pieces to each other and two vertical mounting bars connecting both ends of the horizontal mounting bar to the closing frame piece, and the ladder is attached to either the vertical mounting bar, the horizontal mounting bar, or the closing frame piece.

5. 2. The wheeled housing according to claim 1, wherein the housing body comprises a first housing body having a rear end surface, and a second housing body having the door surface and slidably attached to the first housing body.

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