JP4468147B2 - Canopy - Google Patents

Description

  The present invention relates to a canopy having a ROPS function capable of tilting up in a work vehicle.

  Conventionally, for example, a vehicle equipped with a small excavation work device or the like is used as a work vehicle used for construction civil engineering. These work vehicles are equipped with a driver protection structure called ROPS (Roll-over Protective Structure) in order to ensure the safety of the driver when the vehicle rolls over, as the demand for improving the safety of the driver increases. It has been required to equip a canopy. Further, ROPS is required to satisfy strength standards and material standards defined by ISO standards and the like.

  Examples of the canopy having the ROPS function include a work vehicle (see Patent Document 1) in which a canopy is attached to a canopy mounting seat provided on a counterweight.

  In the work vehicle described in Patent Document 1, the upper surface of the counterweight 51 is configured as a canopy mounting seat 55 as shown in FIG. A mounting bracket 54 is provided at the lower end portion of the canopy 52 that supports the roof 56 by two support columns 57 disposed on the rear side of the vehicle.

  The mounting bracket 54 is placed on the canopy mounting seat 55, and the canopy 52 can be mounted and fixed to the counterweight 51 by screwing the bolts 58. With the hinge pin 59 of the tilt hinge 61 fixed to the front end of the floor 53 as the center of rotation, the canopy 52 can be tilted up while being fixed integrally with the floor 53.

In FIG. 9, the solid line shows a state where the canopy 52 is tilted up together with the floor 54 from the normal state shown by the dotted line. By tilting up the floor 53 and the canopy 52, a space above the engine 60 can be widened, and work such as maintenance and inspection in the engine room can be performed efficiently.
JP 2004-142730 A

  In the canopy 52 shown in Patent Document 1, the canopy mounting seat 55 is molded integrally with the counterweight 51 by forging. Therefore, the canopy mounting seat 55 of the canopy 52 can maintain a desired strength and can satisfy the strength standard as ROPS defined by the ISO standard or the like. In addition, since an inspection hole (not shown) is formed in the central portion of the counterweight 51, there is an advantage that maintenance inspection work for an engine (not shown) mounted on the front portion of the counterweight 51 can be easily performed. .

  However, the canopy 52 is constituted by two struts 57. For this reason, in order to ensure the safety in the canopy 52 even when the vehicle weight or the like increases, a canopy structure having four strut structures arranged in pairs at the front and rear is provided. It will be necessary.

  If the canopy 52 is configured with four columns, the lower ends of the pair of columns disposed on the front side are attached to the front end of the floor 53. This is because, as a configuration for tilting up, a configuration in which the hinge pin 59 of the tilting hinge 61 fixed to the tip of the floor 53 is the center of rotation is used.

  For this reason, it is necessary for the floor 53 to have a sufficient thickness to satisfy the strength standard of the canopy as ROPS, and to firmly support and fix the four columns. In particular, in a small work vehicle having a relatively light vehicle weight, if the thickness of the floor 53 is configured to be equal to or greater than a desired thickness, the weight of the floor 53 may exceed the weight of the work vehicle. is there.

  Further, since the tilt hinge 61 is fixed to the tip of the floor 53 by welding or the like, when the tilt hinge 61 is replaced, the hinge pin 59 and the like are removed while being fixed to the floor 53. It will be difficult to carry out the removal work. Conversely, when the hinge pin 59 or the like is attached to the tilting hinge 61 or during assembly work, the same difficulty as in the case of removal is accompanied. Further, in order to conform to JIS A8910 as ROPS, a special material having a prescribed strength against brittle fracture is required, leading to high costs.

  It is an object of the present invention to provide a canopy capable of rotating and supporting the canopy and a floor independently in a tilt-up canopy having a ROPS function having four columns.

The object of the present invention can be achieved by the invention described in claim 1.
That is, in the present invention, as described in claim 1, in a canopy having a ROPS function having a roof portion and four struts supporting the roof portion erected in front of and behind a work vehicle, respectively. A rotating support member provided at an independent position with respect to the canopy , wherein lower end portions of the pair of rear support columns disposed on the rear side are detachably supported and fixed to the components of the work vehicle . The work vehicle is rotatably supported by a component of the work vehicle, and the rotation support member is configured to be rotatable about a rotation center axis when the canopy is tilted up and disposed on the front side. lower ends of the pair of front pillars, and forms the most important feature that formed by detachably supported directly fixed to the rotary support member.

In this invention, it is set as the structure which directly supported the canopy comprised by four support | pillars with the structural member of a work vehicle. For this reason, the lower end part of a pair of back side support | pillar arrange | positioned on the back side of a working vehicle is supported and fixed so that attachment or detachment with respect to the structural member of a working vehicle is possible. Moreover, the lower end part of a pair of front side support | pillar arrange | positioned in the front side of the working vehicle is supported and fixed to the rotation support member so that attachment or detachment is possible directly. And while providing a rotation support member independently with respect to a canopy, the rotation center axis | shaft at the time of tilt-up of a canopy is comprised so that rotation is possible as a rotation center axis.

  Thereby, a canopy can be comprised as a structure which satisfy | filled the reference | standard intensity | strength as ROPS. In addition, since the rotation support member is formed separately from the floor, repair inspection, replacement work, and assembly work related to the rotation support member can be easily performed.

  Further, since the floor can be configured separately from the canopy, the thickness of the floor can be set to a thickness that can function as a floor, and an increase in the weight of the floor can be suppressed. In addition, it is unnecessary to use ROPS material for the floor, and the cost is reduced.

  According to the present invention, it can be used as a canopy having sufficient strength even for a work vehicle having a relatively light vehicle weight, such as a twisting force against the canopy, an impact force applied to the canopy when the work vehicle falls, a weight of the work vehicle, etc. It is possible to provide a canopy that secures rigidity against the above.

  Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. As the configuration of the canopy of the present invention, in addition to the shape and arrangement configuration described below, the shape and arrangement configuration can be adopted as long as they can solve the problems of the present invention. Is. For this reason, this invention is not limited to the Example demonstrated below, A various change is possible.

  FIG. 1 is a schematic side view of a main part of a work vehicle according to an embodiment of the present invention. The canopy 4 is provided so as to cover an upper part, a front part, a rear part, and the like of the driver's seat 6. When the work vehicle falls, the canopy 4 is configured to ensure the safety of the worker.

  The roof 5 in the canopy 4 is formed in a shape in which a pair of front columns 9a, 9b and rear columns 10a, 10b arranged in the front-rear direction of the work vehicle are connected in the front-rear direction, and is not shown in the upper part of the connecting portion. A roof member is attached. The lower ends of the pair of rear columns 10 a and 10 b on the rear side are connected and fixed by the mounting seat plate 11.

  A plurality of mounting holes (not shown) are formed in the mounting seat plate 11. The mounting seat plate 11 is placed on a canopy mounting seat 18 formed on the counterweight 2 and can be firmly supported and fixed with the canopy mounting seat 18 via mounting bolts 15. The canopy mounting seat 18 is not limited to being formed on the counterweight 2, but can be formed on other components constituting the work vehicle.

  In addition, in order to relieve stress concentration in the connecting and fixing portion between the lower end portions of the pair of left and right rear columns 10a and 10b and the mounting seat plate 11, the shape of the connecting and fixing portion may be a smooth connecting shape. A reinforcing rib or the like (not shown) may be formed on the mounting seat plate 11.

  The mounting seat plate 11 is formed with a floor support member 12 that supports and fixes the rear end portion of the floor 7 via a fixing bolt (not shown). The floor support member 12 can be formed on the canopy mounting seat 18 side, or can be formed on other components of the work vehicle.

  As shown in the schematic front view of the main part of the work vehicle in FIG. 2, the lower ends of the pair of front columns 9 a and 9 b on the front side are formed as continuous lower end connecting portions 34 that are bent inward and facing each other. Yes. A pair of coupling members 14 are fixed to the lower end connecting portion 34. Each coupling member 14 is fixed via a mounting bolt 16 to a protrusion 21 of a rotation support member 20 that becomes a rotation member when the canopy 4 and the floor 7 are tilted up.

  Between the front columns 9a and 9b, a beam member 35 is disposed between the pair of front columns 9a and 9b in order to reinforce the strength between the front columns 9a and 9b. Similar beam members may be disposed between the pair of rear columns 10a and 10b or on the roof 5.

  Instead of configuring the lower end connecting portion 34 at the lower end portions of the pair of front columns 9a and 9b, a configuration using a mounting seat plate similar to the mounting seat plate fixed to the lower ends of the rear columns 10a and 10b is used. You can also.

  The part enclosed by the dashed-dotted line of FIG. 1 is expanded and shown in FIG. As shown in FIG. 3, the rotation support member 20 includes a plurality of rotation support portions 23 that rotate around the rotation shaft 28, a flange portion 22 fixed to the rotation support portion 23, and a flange portion 22. It is comprised from the protrusion part 21 which protruded and formed in the surface side. Details of the rotation support portion 23 are shown in FIGS. FIG. 6 shows a front view of the rotation support member 20, FIG. 7 shows a side view of the rotation support member 20, and FIG. 8 shows a plan view of the rotation support member 20.

  As shown in FIGS. 5 and 6, which are VV cross-sections of FIG. 3, a bearing supported by a component 31 of the work vehicle between a pair of rotation support portions 23 formed at both ends of the flange portion 22. 30, the rotation support member 20 is rotated around the rotation shaft 28 by inserting the rotation shaft 28 through the bearing 30 and the rotation shaft hole 24 of the rotation support portion 23. It can be supported freely.

  Further, as shown in FIGS. 5 and 7, by attaching a flange portion 28 a fixed to the rotation shaft 28 to a positioning hole 25 formed in the rotation support portion 23 via a positioning screw, the rotation shaft 28 is attached. The rotating member 23 can be fixed.

  The coupling member 14 attached to the lower ends of the front struts 9a and 9b can be fixed to the protrusions 21 of the rotation support member 20 via the fixing bolts 16. By attaching the fixing bolt 16 inserted into the engaging hole of the coupling member 14 to the fixing hole 21 a formed in the protruding portion 21, the coupling member 14 can be fixed to the rotation support member 20. Accordingly, the four front columns 9a and 9b and the rear columns 10a and 10b are fixed by the constituent members of the work vehicle, and a block-shaped space portion can be formed between the canopy 4 and the constituent members. By forming the space portion of the carriage seat 6 formed by the canopy 4 in a block shape, it is possible to firmly prevent the canopy 4 from being deformed when the work vehicle falls.

As shown by a chain line in FIG. 1, the floor 7 is placed in a state of being spanned between the rotation support member 20 and the floor support member 12, and between the floor 7 and the rotation support member 20 and the floor 7. And the floor support member 12 can be supported and fixed to each other. As a method of mounting and fixing the floor 7 on the rotation support member 20 , after the rotation support member 20 is mounted and supported on the component 31 of the work vehicle, the floor 7 is flanged on the rotation support member 20. 22 is mounted. At this time, as shown by the dotted line in FIG. 8, the protrusion 21 of the rotation support member 20 is loosely fitted and placed in the hole 7 a formed on the front end side of the floor 7.

  After the floor 7 is placed on the flange portion 22 of the rotation support member 20, the floor 7 is fixed by a fixing bolt or the like (not shown) through a fixing hole 22 a formed in the flange portion 22. After the floor 7 is placed and fixed on the rotation support member 20, the coupling member 14 provided at the lower end connecting portion 34 of the front support columns 9 a and 9 b of the canopy 4 and the protrusion 21 of the rotation support member 20 are fixed to the fixing bolt. 16 can be fixed.

  As a fixing method using the fixing bolt 16, a conventionally used fixing method can be used. A fixing method in which the fixing bolt 21 is screwed into the fixing hole 21a formed in the protruding portion 21b, and a fixing in which a nut is arranged on the back side of the fixing hole 21b. A method or the like can be used. Further, the fixing with other fixing bolts or the like in the embodiment according to the present invention is also fixed using a known fixing method.

As shown in FIG. 4, after the fixing bolt 15 is removed to release the fixed state between the mounting seat plate 11 and the canopy mounting seat 18, the lock member 33 that prohibits the tilt-up operation (see FIGS. 1 and 3). If the lock member is omitted , the rear side of the canopy 4 becomes free, so that the canopy 4 can be rotated forward about the rotation shaft 28. Thereby, it is possible to facilitate the repair and inspection in the engine room.

  The rotation of the floor 7 is exemplified as a configuration in which the tip end portion of the floor 7 is fixed to the flange portion 22 of the rotation support member 20, but the member that supports the rotation of the floor 7 is the rotation support member 20. It can also be configured by a separate member.

The present invention can apply the technical idea of the present invention to an apparatus or the like to which the technical idea of the present invention can be applied.

It is a principal part schematic side view of a work vehicle. (Example) It is a principal part schematic front view of a work vehicle. (Example) It is a principal part enlarged view of FIG. (Example) It is a principal part schematic side view which shows the state which tilted up the canopy. (Example) It is VV sectional drawing of FIG. (Example) It is a front view of a rotation support member. (Example) It is a side view of a rotation support member. (Example) It is a top view of a rotation support member. (Example) It is a principal part schematic side view of a work vehicle. (Conventional example)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work vehicle 2 Counterweight 4 Canopy 7 Floor 9a, b Front side support | pillar 10a, b Back side support | pillar 11 Mounting seat plate 12 Floor support member 14 Connection member 18 Canopy mounting seat 20 Rotation support member 21 Projection part 22 Flange part 23 times Moving support portion 24 Rotating shaft hole 25 Positioning hole 28 Rotating shaft 28a Flange portion 31 Component member 33 Lock member 34 Lower end connecting portion 51 Counterweight 52 Canopy 53 Floor 54 Mounting bracket 55 Canopy mounting seat 57 Post 59 Hinge pin 60 Engine 61 Tilt Hinge

Claims (1)

In a canopy having a ROPS function having a roof part and four struts supporting the roof part erected one by one before and after the work vehicle,
The lower end portions of the pair of rear side columns disposed on the rear side are detachably supported and fixed to the constituent members of the work vehicle,
A rotation support member provided independently of the canopy is rotatably supported by a component of the work vehicle,
The rotation support member is configured to be rotatable about a rotation center axis when the canopy is tilted up,
Canopy the lower ends of the pair of front struts disposed on the front side, characterized in that formed by detachably directly supported and fixed against the rotary support member.

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