WO2014083659A1 - Forklift head-guard structure - Google Patents

Forklift head-guard structure Download PDF

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Publication number
WO2014083659A1
WO2014083659A1 PCT/JP2012/080958 JP2012080958W WO2014083659A1 WO 2014083659 A1 WO2014083659 A1 WO 2014083659A1 JP 2012080958 W JP2012080958 W JP 2012080958W WO 2014083659 A1 WO2014083659 A1 WO 2014083659A1
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WO
WIPO (PCT)
Prior art keywords
width direction
forklift
vehicle width
head guard
guard structure
Prior art date
Application number
PCT/JP2012/080958
Other languages
French (fr)
Japanese (ja)
Inventor
明浩 石神
朋之 早川
Original Assignee
ニチユ三菱フォークリフト株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ニチユ三菱フォークリフト株式会社 filed Critical ニチユ三菱フォークリフト株式会社
Priority to JP2014549708A priority Critical patent/JPWO2014083659A1/en
Priority to BR112015007276A priority patent/BR112015007276A2/en
Priority to CN201280075234.1A priority patent/CN104520227A/en
Priority to EP12889009.2A priority patent/EP2915771B1/en
Priority to PCT/JP2012/080958 priority patent/WO2014083659A1/en
Publication of WO2014083659A1 publication Critical patent/WO2014083659A1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075Constructional features or details
    • B66F9/07545Overhead guards

Definitions

  • the present invention relates to a head guard structure of a forklift.
  • a head guard is attached.
  • the head guards are a pair of left and right front supports disposed at intervals in the vehicle width direction at the front of the forklift and a pair of left and right pairs disposed at intervals in the vehicle width direction at the rear of the vehicle.
  • Side pillars It has a ceiling supported between the front support and the rear support, and has a rigid structure to protect the driver from falling luggage.
  • Patent document 1 exists as a structure of a head guard.
  • front covers are fixed by bolts to left and right support columns on the front side of a head guard provided on a vehicle body.
  • the front cover is formed of a transparent resin having strength and durability such as polycarbonate. This prevents the driver from being flooded when it rains.
  • a ceiling cover formed in the same configuration is provided to prevent the driver from being flooded when it rains.
  • a U-shaped notch whose side portion is opened is provided at the vehicle longitudinal direction middle portion.
  • a lid is provided to close the notch.
  • the roof plate of the roof cover is formed of a metal plate such as an iron plate, a rigid resin plate including FRP, or the like.
  • Patent Document 1 the front and the ceiling are covered with polycarbonate or the like.
  • the polycarbonate causes fine scratches due to aging, and when it is hit by light, it diffusely reflects and the visibility becomes significantly worse. Furthermore, if the package falls from above, it is broken and the broken material falls on the driver.
  • the notch part for loading and unloading of the battery of the own vehicle is provided in the roof cover of the head guard. The notch is closed by a lid. However, since the notch portion is formed, the rigidity required as the head guard can not be secured unless many reinforcing members are provided in the ceiling portion and the lid.
  • the structure becomes complicated, and the cost of the reinforcing material, the number of manufacturing steps, and the like increase and the cost increases. Further, since the roof plate of the roof cover is formed of a metal plate such as an iron plate, FRP or the like, it is opaque and has a problem that it is not possible to secure the upper view.
  • the present invention is an invention made in view of the above-mentioned problems, wherein the fork tip can be directly confirmed when the fork loaded with the load reaches the uppermost position, and the driver is directly covered with water when it rains To provide a forklift head guard structure that prevents
  • the present invention has a pair of left and right front struts attached to the front of a forklift, and spaced apart in the vehicle width direction; A pair of left and right rear struts attached to the rear of the vehicle body and spaced apart in the vehicle width direction; A pair of left and right vertical frames connecting an upper end portion of the front support post and an upper end portion of the rear support post in a longitudinal direction of the vehicle body; A front side horizontal frame connecting upper ends of the pair of left and right front support columns in the vehicle width direction; The bridge extends between the left and right longitudinal frames and extends from the rear end of the longitudinal frame to the front of the vehicle body, and the front end is located in the longitudinal middle of the longitudinal frame and is continuous with the front end A top plate having a front flange surface bent downward; Forklift characterized in that one end is fixed to the front lateral frame, and the other end is fixed to the front flange surface, and a plurality of rod members are arranged at intervals in the vehicle width direction.
  • a head guard characterized in that
  • the rear half of the ceiling of the head guard that is, the upper portion of the driver is covered with the top plate, and the both sides are fixed to the pair of left and right vertical frames.
  • the rigidity is high, and in rainy weather, the driver can be protected from rain, and the forward upper view during forklift operation can be maintained. Therefore, it is possible to improve the workability and safety of the forklift when it rains.
  • the vehicle front-rear direction position of the front flange surface is at least a regular seating position via the gap between the rod members when the fork tip for placing the load reaches the uppermost position. It is preferable to be positioned behind a line connecting the eye point of the driver and the tip of the fork when the driver is seated on the seat.
  • the driver when the fork is raised to the uppermost position, the driver can check the fork tip at the regular sitting position, that is, the posture in which the operation operation of the forklift can be operated without any problem. Safety is improved.
  • the rear end portion of the top plate has a rear flange surface bent downward, and both end edges of the rear flange surface in the vehicle width direction are the pair of rear columns It is good to be fixed to each.
  • the rigidity of the rear support column in the vehicle width direction can be improved by the rear flange surface. Furthermore, since the rear flange surface has the same effect (improved rigidity in the vehicle width direction) as the front lateral frame, cost can be reduced.
  • the top plate is formed with a strip-shaped groove displaced in the vertical direction over the entire area in the vehicle width direction.
  • the grooved groove is formed on the top plate over the entire vehicle width direction, the rigidity for falling objects from above the top plate can be improved, and the vehicle width direction of the front support and the rear support To improve the rigidity of the
  • a reinforcing member extending in the vehicle width direction may be provided on the top plate at a position opposite to the driver's seat on the driver seat side surface of the top plate.
  • the rigidity can be easily improved with respect to falling objects from above the top plate.
  • the rod member has a rectangular cross-sectional shape in a direction perpendicular to the axis of the rod member, and the long side of the cross-sectional shape is disposed in the vertical direction.
  • the gap between the rod members becomes larger than when the long side of the rectangular cross section is arranged in the horizontal direction Becomes wider. Furthermore, by arranging the long side in the vertical direction, the rigidity in the vertical direction is improved, and the safety is improved. Further, in the case of keeping the rigidity the same, it is possible to reduce the weight of the material and to reduce the material cost associated with the weight reduction.
  • a fork head guard structure can be provided that can directly confirm the fork tip on which a load is placed and prevent the driver from directly receiving rainwater when it rains.
  • Fig. 1 shows a schematic side view of a forklift in which the present invention is implemented.
  • Fig. 1 shows a schematic perspective view of a head guard in which the present invention is implemented.
  • Fig. 2 shows a schematic perspective view of a head guard ceiling according to the invention;
  • A) is a joint structure detail drawing of the head guard ceiling part of this invention,
  • B) shows the welding range figure of gusset.
  • A) shows a mounting structure of the front column on the vehicle body,
  • B) shows a cross-sectional view of (A) along AA.
  • A) shows the attachment structural drawing to the vehicle body side of a rear side support
  • B) shows the assembly exploded view which assembles a rear side support
  • FIG. 1 shows a schematic side view of a forklift according to the present invention, and 1 shows a side view of the entire forklift.
  • the forklift 1 includes a vehicle body 21, a load lifting device 7 mounted on a front portion of the vehicle body 21, and a head guard 5 for preventing the load lifted by the load lifting device 7 from collapsing and dropping to the driver's seat; It is attached to the front wheel 8 which is a driving wheel for moving the forklift 1 and to the rear of the vehicle body 21 and is attached to the rear wheel 9 which is a steering wheel of the forklift 1 and to the rear of the vehicle 21.
  • the counterweight 3 has a weight that allows the rear wheel 9 to come into strong contact with the road surface, the steering wheel 6 for steering the rear wheel 9, and the seat 10 on which the driver is seated. It is configured. In addition, since the rear wheel 9 is a steering wheel, the forklift 1 is strongly in contact with the road surface by the counterweight 3.
  • the vehicle body 21 includes a vehicle 21 on which traveling and working devices such as an engine, a device for driving front wheels, a hydraulic pump such as a hydraulic cylinder, and a steering device for rear wheels are placed. It is comprised with the engine cover 24 to cover.
  • the vehicle body 21 to which the head guard 5 is attached has a rectangular basic cross section in the vehicle width direction, extends in the longitudinal direction of the vehicle, and has a pair of left and right side frames (not shown) And a plurality of cross members (not shown) arranged to connect the pair of left and right side frames in the vehicle width direction and to have an interval in the front and rear direction.
  • a device for traveling between the pair of left and right side frames and a working device are configured to be stored.
  • An engine cover 24 covers between a pair of left and right side frames.
  • a seat 10 on which the driver is seated is disposed on the upper surface of the engine cover 24.
  • the vehicle body 21 is formed with high strength and high rigidity because the counterweight 3 and the like are connected via the cross member.
  • the luggage lifting device 7 has a fork (claw) 72 having an L-shaped side view for placing a luggage, a backrest 73 to which the fork 72 is attached, and a mast 71 for slidably supporting the backrest 73 vertically. And a lift chain (not shown) for sliding the backrest 73 in the vertical direction, and the backrest 73 fitted on the inside of the mast 71 slidably in the vertical direction with respect to the mast 71.
  • An auxiliary mast 75 is provided to lift the upper end further upward, and a tilt cylinder (hydraulic pressure) 76 for tilting the mast 71 and the auxiliary mast 75 to adjust the tip of the fork 72.
  • the tip of the fork 72 is inclined (adjusted) up and down, the fork 72 is inserted below the load, and the load is placed on the fork 72.
  • the auxiliary mast 75 slides up and down with respect to the mast 71 by a lift cylinder (hydraulic pressure) (not shown).
  • the external-appearance perspective view of the head guard 5 is shown in FIG.
  • the head guard 5 includes a pair of left and right front supports 51 51 disposed at a front portion of the vehicle body 21 in the vehicle width direction and a pair of left and right rear members disposed at a rear portion of the vehicle body 21 in a vehicle width direction. It is comprised by the side support
  • pillar is arrange
  • the front support post 51 is formed in a columnar shape having a substantially rectangular hollow closed cross-sectional shape in a cross section in a direction perpendicular to the axis of the support post. As shown in FIG. 1, the lower portion of the front support post 51 is attached to the front portion of the vehicle body 21 of the forklift 1 and to the upper portion of the front wheel 8. The details of the mounting structure of the lower part of the front column 51 are shown in FIGS. 5 (A) and 5 (B).
  • the vehicle body 21 side attachment portion structure of the front support 51 is disposed on the vehicle middle side of the left and right front attachment brackets 21b standing up on the upper surface of the front fender 21a of the vehicle body 21 and the front attachment bracket 21b.
  • a pair of left and right reinforcing gussets 21c for maintaining rigidity in the vehicle width direction and a pair of left and right reinforcing gussets 21c are connected, and the steering wheel 6, operation levers for traveling and load lifting operations, meter devices for driving are mounted And an instrument panel 28 (see FIG. 1) or the like in which a reinforcement instrument reinforcement is disposed.
  • each of the left and right front mounting brackets 21b has its tip end side inclined to the inside of the vehicle body 21, and has a trapezoidal inclined surface in a vehicle longitudinal direction.
  • This inclined surface serves as a guide for insertion from above when attaching the front support post 51 to the front mounting bracket 21b, and the positioning of the vehicle width direction center line of the vehicle body 21 and the vehicle width direction center line of the head guard 5 is performed. It will be easier. Accordingly, the lower end of the head guard 5 along the inclined surface has a relation of the lower end in the vehicle width direction WL and the upper end in the vehicle width direction WW> WU.
  • the front mounting bracket 21b includes a first mounting hole 21d penetrating in the vehicle width direction and a nut 22d constituting a fastening member 22 fixed at a position corresponding to the first mounting hole 21d inside the front mounting bracket 21b. It is welded.
  • FIG. 5 (B) shows an AA cross section of FIG. 5 (A).
  • two second mounting holes 51a are juxtaposed in the vertical direction on the surface opposite to the first mounting holes 21d.
  • the second mounting hole 51a is formed in a surface that contacts the front mounting bracket 21b having a rectangular cross section.
  • a working hole 51b larger than the hole diameter of the second mounting hole 51a is drilled on the surface opposite to the surface on which the second mounting hole 51a of the rectangular cross section is drilled. There is.
  • the working hole 51b has a hole diameter that allows insertion of the bolt 22a, the spring washer 22b, and the plain washer 22c constituting the fastening member 22 and a box wrench (not shown) for tightening the bolt 22a.
  • the front support post 51 has the spring washer 22b and the plain washer 22c assembled to the bolt 22a, which is the fastening member 22, and is screwed to the nut 22d through the working hole 51b to be fixed to the front mounting bracket 21b.
  • the work hole 51b is closed by the resin plug 23 after the first bolt 22a is tightened.
  • the rear support column 52 is formed in a columnar shape having a substantially rectangular hollow closed cross-sectional shape in a cross section perpendicular to the axis of the support support.
  • the mounting structure of the lower portion of the rear support 52 to the vehicle body 21 is shown in FIGS. 6 (A) and 6 (B).
  • the frame (not shown in FIG. 6) side attachment portion structure of the rear support 52 is a pair of left and right first support brackets 26 disposed at the rear of the vehicle body 21 and along the lateral surface of the upper surface of the frame in the vehicle width direction. And a pair of left and right second support brackets 27 extending upward from the frame.
  • the first support bracket 26 has a columnar shape having a substantially rectangular cross section in plan view.
  • the rear mounting bracket 25 to which the rear support post 52 of the head guard 5 is attached is fixed to the upper portion of the first support bracket 26 and the second support bracket 27 in a bridged manner. Therefore, the mounting portion at the lower portion of the rear support 52 is structured to have high rigidity with respect to the vertical and horizontal directions of the vehicle.
  • the rear mounting bracket 25 is continuous with the flat portion 25a bridged to the upper portion of the first support bracket 26 and the second support bracket 27, and the flat portion 25a. It is formed of a vertical wall portion 25c bent downward and a projection 25a to which the rear support post 52 is attached.
  • the protrusion 25 a is disposed to abut on the front side surface of the rectangular closed cross section of the rear side post 52.
  • a fourth attachment hole 25d penetrating in the longitudinal direction of the vehicle is bored in the projection 25a at a position corresponding to the third attachment hole 52a of the rear column 52.
  • the protrusion 25a On the side opposite to the surface in contact with the rear support 52, the protrusion 25a is provided with a nut 22d that constitutes the fastening member 22 in alignment with the axis of the fourth mounting hole 25d. Further, at the tip end of the projection 25a, a guide portion 25e which is inclined (or may be arc-shaped) rearward of the vehicle is provided for facilitating the fitting when the rear support post 52 is fitted onto the projection 25a.
  • the ceiling 53 includes a pair of left and right vertical frames 55 connecting the upper end of the front support 51 and the upper end of the rear support 52, a front horizontal frame 54 connecting the pair of left and right front support 51, and the vertical frame 53. From the rear end side to a top plate 56a having a front flange surface 56b that extends to the vehicle longitudinal direction middle part of the vertical frame 55 and is bent downward, and a space between the front flange surface 56b and the front horizontal frame 54 One end is fixed to the front lateral frame 54, the other end is fixed to the front flange portion 56b, and a plurality of rod members 57 are provided at intervals in the vehicle width direction.
  • connection between the vertical frame 55 and the rear support 52 is fixed (welded). Further, a substantially L-shaped thick gusset 58 is welded to the connection between the vertical frame 55 and the rear support 52.
  • An L-shaped one portion 58 a is disposed along the inside of the upper end of the rear support 52 and the other L-shaped portion 58 b is disposed along the inside of the rear end of the vertical frame 55.
  • the end portions of the L-shaped one portion 58a and the other portion 58b are formed in a semicircular shape.
  • the substantially L-shaped thick gusset 58, the vertical frame 55, and the rear support 52 are continuously welded all around the substantially L-shaped thick gusset 58 as shown in FIG. 4B. .
  • the edge of the gusset 58 has a semi-circular shape, and the portion where the highest stress acts when a bending force is applied between the rear support 52 and the vertical frame 53 in the front-rear direction or the vehicle width direction ( It is made for the welding completion part not to occur in one part 58a and the other part 58b). At the weld end portion, the welding heat escapes to the periphery and the welding penetration tends to be insufficient, and the cooling is quick and the welding strength tends to be reduced.
  • the ceiling portion 53 is configured by a top plate 56 and a plurality of bar members 57 disposed between the top plate 56 and the front lateral frame 54.
  • the top plate 56 is formed in a flat shape to prevent the driver from getting wet, and has a ceiling portion 56a, a front flange surface 56b continuously bent on the front side in the vehicle longitudinal direction downward to the ceiling portion 56a, and a ceiling portion 56a.
  • the rear flange surface 56c is bent downward at the rear in the vehicle longitudinal direction continuously, the welding margin portion 56d welded to the upper surface of the pair of left and right vertical frames 55, and the ceiling portion 56a on the driver side of the ceiling portion 56a As well as forming a hollow closed cross section having a rectangular cross section in the front-rear direction, it is constituted by a reinforcing member 56e disposed over the entire vehicle width direction.
  • the position of the front flange surface 56b in the vehicle longitudinal direction is, as shown in FIG. 1, the tip 72a of the fork 72 when the fork 72 of the forklift 1 reaches the uppermost position when the driver is seated properly on the seat 10. It is a part that can be checked directly. That is, the front flange surface position FP is positioned at least on the rear side in the vehicle longitudinal direction from the position where the lower end edge 56bp of the front flange surface 56b contacts the connecting line IL between the driver's eyepoint IP and the tip 72a of the fork 72 It is. Therefore, the front flange surface position FP also changes depending on the height of the head guard 5.
  • the normal sitting state is a posture in which a driver of a standard size is seated on the seat 10 and the driving operation of the forklift 1 can be easily performed.
  • the rod member 57 has a rectangular cross section in a direction perpendicular to the axis of the rod member 57 and has a solid closed cross sectional shape.
  • the rod member 57 has rectangular long sides arranged in the vertical direction, and one end is fixed (welded) to the front side horizontal frame 54 and the other end to the front flange surface 56b. Therefore, since the rod member 57 is fixed in a vertically long (high) state, high rigidity can be maintained with respect to a falling object from above. Furthermore, since the vehicle width direction is the short side direction of the rectangle, the gap between the rod members 57 can be increased by that amount, which has the effect of widening the upper view.
  • the rod member 57 is a rectangular cross section of a thick plate, the same effect can be obtained by arranging the long side in the vertical direction by using a rectangular hollow material.
  • the connection structure of the top plate 56 with the vertical frame 55 and the rear support 52 will be described based on FIG. 4.
  • the top plate 56 mounts the flange 56 d of the end portion in the vehicle width direction of the top plate 56 on the upper surface of the pair of left and right vertical frames 55.
  • the flange 56d is fillet welded W3 on the upper surface of the pair of left and right vertical frames 55 all over the longitudinal direction of the vehicle.
  • a fillet weld W4 is performed in the vertical direction between the vehicle width direction end edge of the front flange surface 56b and the inner side surface of the vertical frame 55.
  • an end edge of the rear flange surface 56c of the top plate 56 in the vehicle width direction is fillet welded W5 in the vertical direction to an inner side surface of the gusset 58 connecting the vertical frame 55 and the rear support 52. It is done.
  • the top plate 56 is formed in a box shape whose lower side is opened by the ceiling portion 56a of the top plate, the front flange surface 56b, the rear flange surface 56c, and the left and right vertical frames 55, 55. Therefore, the top plate 56 becomes the high rigidity head guard 5 by the reinforcing member 56e disposed on the driver's side of the ceiling portion 56a and the above-described box shape, and particularly the high rigidity in the vertical direction. Have.
  • the groove is formed in a wave shape (a circular arc or a triangle) or a trapezoid in which the cross section in the vehicle longitudinal direction is vertically displaced. You may form. With such a structure, the rigidity of the entire ceiling portion 56a in the vertical direction is increased. There is no need for the reinforcing member 56e, and material cost and weight can be reduced.
  • the head guard 5 can be made highly rigid and the head clearance of the driver (the driver's head and the top plate 56 Gap) HC can be increased, and the habitability is improved, leading to the improvement of the productability.
  • the front flange 56b of the top plate 56 is positioned on the rear side in the vehicle longitudinal direction with respect to the connecting line IL connecting the driver's eye point IP and the fork tip 72a when the fork 72 reaches the uppermost position. I made it. Therefore, the fork tip can be directly confirmed when the fork loaded with the load reaches the uppermost position, and the head guard structure of the forklift can prevent the driver from receiving the rain water directly when it is raining.
  • It can be provided as a mounting structure for mounting a head guard on the body of a forklift.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

[Problem] To provide a forklift head-guard structure that prevents the operator from getting directly rained on and makes it possible to directly see the tip of a load-carrying fork at a maximum-height position. [Solution] This forklift head-guard structure is characterized by the provision of the following: a left/right pair of front support columns (51) attached to the front of a vehicle body (21); a left/right pair of rear support columns (52) attached to the rear of the vehicle body (21); a left/right pair of vertical frames (55) that connect the top ends of the front support columns (51) and the rear support columns (52); a front horizontal frame (54) that connects the top ends of the left/right pair of front support columns (51); a roof panel (56) that extends between the left/right pair of vertical frames (55), the front edge of said roof panel (56) having a front flange surface (56b) that is positioned centrally in the front/rear direction of the vertical frames (55) and bends downward; and a plurality of rod members (57) that are provided at intervals in the width direction of the vehicle and are affixed to the front horizontal frame (54) and the front flange surface (56b).

Description

フォークリフトのヘッドガード構造Forklift head guard structure
 本発明は、フォークリフトのヘッドガード構造に関する。 The present invention relates to a head guard structure of a forklift.
 各種の荷物の運搬、積み降ろしに使用されるフォークリフトにおいて、荷物の高所への積み降ろしの際に、荷崩れ等により、荷物が落下した際に、荷物から運転者を守るための防護装置としてヘッドガードが装着されている。
 ヘッドガードは、フォークリフトの車体前部に車幅方向に間隔を有して配設された左右一対の前側支柱と、車体後部に車幅方向に間隔を有して配設された左右一対の後側支柱と、
 前記前側支柱と前記後側支柱間に架設された天井部とを有しており、運転者を落下する荷物から守るために剛性の高い構造にしてある。
 ヘッドガードの構造として特許文献1が存在する。
For forklifts used for transporting and unloading various kinds of luggage, as a protective device to protect the driver from the luggage when the luggage falls due to a load collapse etc. at the time of unloading the luggage to the high place A head guard is attached.
The head guards are a pair of left and right front supports disposed at intervals in the vehicle width direction at the front of the forklift and a pair of left and right pairs disposed at intervals in the vehicle width direction at the rear of the vehicle. Side pillars,
It has a ceiling supported between the front support and the rear support, and has a rigid structure to protect the driver from falling luggage.
Patent document 1 exists as a structure of a head guard.
 特許文献1によると、車体に設けられたヘッドガードの前方側の左右の支柱に前カバーがボルトで固定されている。
 この前カバーはポリカーボネートなどの強度と耐久性を備えた透明の樹脂で形成されている。
 これにより、雨天時に、運転者への被水を防止している。
 更に、同様構成にて形成された天井用のカバーを設けて、雨天時に、運転者への被水を防止している。
According to Patent Document 1, front covers are fixed by bolts to left and right support columns on the front side of a head guard provided on a vehicle body.
The front cover is formed of a transparent resin having strength and durability such as polycarbonate.
This prevents the driver from being flooded when it rains.
Furthermore, a ceiling cover formed in the same configuration is provided to prevent the driver from being flooded when it rains.
 更に、特許文献2には、ヘッドガードのルーフカバーにフォークリフトのバッテリーの積み降ろしを行うため、車両前後方向中間部に側部が開口したU字状の切欠部を設けている。バッテリー積み降ろしを実施しない時は、該切欠部を閉塞する蓋体を備えている。
 そして、ルーフカバーのルーフ板は、鉄板などの金属板、FRPを含む剛性樹脂板等で成形されている。
Further, in Patent Document 2, in order to load and unload the battery of the forklift on the roof cover of the head guard, a U-shaped notch whose side portion is opened is provided at the vehicle longitudinal direction middle portion. When battery unloading is not performed, a lid is provided to close the notch.
The roof plate of the roof cover is formed of a metal plate such as an iron plate, a rigid resin plate including FRP, or the like.
2003-104695号公報2003-104695 2005-82356号公報2005-82356 gazette
 しかしながら、特許文献1によると、前面と天井部にポリカーボネート等で覆っている。ポリカーボネートは、経年変化により微細な傷が生じ、光が当たると乱反射して視界が著しく悪くなる。
 更に、上方から荷物が落下した場合には、破損して、その破損物質が運転者に降りかかる不具合を有している。
 また、特許文献2においては、ヘッドガードのルーフカバーに自車のバッテリーの積み降ろしの為の切欠部を設けている。該切欠部を蓋体にて閉塞している。
 しかし、切欠部が形成されているため、天井部及び蓋体に多くの補強部材を配設しないと、ヘッドガードとして要求される剛性が確保できない。
 従って、構造が複雑になると共に、補強材の費用、製作工数等が嵩みコストが高くなる。
また、ルーフカバーのルーフ板は、鉄板などの金属板、FRP等で形成されているので、不透明であり、上方の視界を確保することができない不具合を有している。
However, according to Patent Document 1, the front and the ceiling are covered with polycarbonate or the like. The polycarbonate causes fine scratches due to aging, and when it is hit by light, it diffusely reflects and the visibility becomes significantly worse.
Furthermore, if the package falls from above, it is broken and the broken material falls on the driver.
Moreover, in patent document 2, the notch part for loading and unloading of the battery of the own vehicle is provided in the roof cover of the head guard. The notch is closed by a lid.
However, since the notch portion is formed, the rigidity required as the head guard can not be secured unless many reinforcing members are provided in the ceiling portion and the lid.
Therefore, the structure becomes complicated, and the cost of the reinforcing material, the number of manufacturing steps, and the like increase and the cost increases.
Further, since the roof plate of the roof cover is formed of a metal plate such as an iron plate, FRP or the like, it is opaque and has a problem that it is not possible to secure the upper view.
 本発明は、上述した課題に鑑みてなされた発明であって、荷物を載置したフォークが最上位置に達した時にフォークの先端部が直接確認できると共に、雨天時に運転者が直接被水するのを防止するフォークリフトのヘッドガード構造の提供を目的とする。 SUMMARY OF THE INVENTION The present invention is an invention made in view of the above-mentioned problems, wherein the fork tip can be directly confirmed when the fork loaded with the load reaches the uppermost position, and the driver is directly covered with water when it rains To provide a forklift head guard structure that prevents
 本発明はかかる課題を解決するため、フォークリフトの車体前部に装着され、車幅方向に離間して配置された左右一対の前側支柱と、
 前記車体の後部に装着され、車幅方向に離間して配置された左右一対の後側支柱と、
 前記前側支柱の上端部と前記後側支柱の上端部とを前記車体の前後方向に連結する左右一対の縦フレームと、
 前記左右一対の前記前側支柱の上端部を車幅方向に連結する前側横フレームと、
 前記左右一対の縦フレーム間に架橋すると共に、前記縦フレームの後端部から前記車体の前方向に延在し、前端が前記縦フレームの前後方向中間部に位置して、前記前端に連続して下方へ屈曲した前側フランジ面を有する天板と、
 一端が前記前側横フレームに固着され、他端が前記前側フランジ面に固着されると共に、車幅方向に間隔を有して複数配設された棒部材と、を備えたことを特徴とするフォークリフトのヘッドガード構造が提供される。
In order to solve such problems, the present invention has a pair of left and right front struts attached to the front of a forklift, and spaced apart in the vehicle width direction;
A pair of left and right rear struts attached to the rear of the vehicle body and spaced apart in the vehicle width direction;
A pair of left and right vertical frames connecting an upper end portion of the front support post and an upper end portion of the rear support post in a longitudinal direction of the vehicle body;
A front side horizontal frame connecting upper ends of the pair of left and right front support columns in the vehicle width direction;
The bridge extends between the left and right longitudinal frames and extends from the rear end of the longitudinal frame to the front of the vehicle body, and the front end is located in the longitudinal middle of the longitudinal frame and is continuous with the front end A top plate having a front flange surface bent downward;
Forklift characterized in that one end is fixed to the front lateral frame, and the other end is fixed to the front flange surface, and a plurality of rod members are arranged at intervals in the vehicle width direction. A head guard structure is provided.
 かかる発明によれば、ヘッドガードの天井部の後側半分、即ち、運転者の上方部分を天板で覆い、両側部を左右一対の縦フレームに固着した構成としたので、天井部の強度及び剛性が高く、且つ、雨天時、雨から運転者を守ることができると共に、フォークリフト運転時の前方の上方視界を維持することができる。
 従って、フォークリフトの雨天時の作業性向上と安全性向上が図れる。 
According to the invention, the rear half of the ceiling of the head guard, that is, the upper portion of the driver is covered with the top plate, and the both sides are fixed to the pair of left and right vertical frames. The rigidity is high, and in rainy weather, the driver can be protected from rain, and the forward upper view during forklift operation can be maintained.
Therefore, it is possible to improve the workability and safety of the forklift when it rains.
 また、本発明において好ましくは、前記前側フランジ面の車両前後方向位置は、荷物を載置するフォークの先端が最上位置に達した時に、前記棒部材間の間隔部を介して、少なくとも正規着座位置に運転者が着座した時の前記運転者のアイポイントと前記フォークの先端とを結んだ線より後方に位置しているとよい。 In the present invention, preferably, the vehicle front-rear direction position of the front flange surface is at least a regular seating position via the gap between the rod members when the fork tip for placing the load reaches the uppermost position. It is preferable to be positioned behind a line connecting the eye point of the driver and the tip of the fork when the driver is seated on the seat.
 かかる発明によれば、フォークが最上位置に上昇した時に、運転者がフォークの先端を正規着座位置、即ち、フォークリフトの運転操作が支障なく操作できる姿勢で確認できるようにしたので、フォークリフトによる荷役作業が行い易くなると共に、安全性が向上する。 According to the invention, when the fork is raised to the uppermost position, the driver can check the fork tip at the regular sitting position, that is, the posture in which the operation operation of the forklift can be operated without any problem. Safety is improved.
 また、本発明において好ましくは、前記天板の前記後端部は、下方へ屈曲した後側フランジ面を有し、前記後側フランジ面の車幅方向の両端縁は、前記一対の後側支柱に夫々固着されているとよい。 In the present invention, preferably, the rear end portion of the top plate has a rear flange surface bent downward, and both end edges of the rear flange surface in the vehicle width direction are the pair of rear columns It is good to be fixed to each.
 かかる発明によれば、後側フランジ面によって、後側支柱の車幅方向の剛性向上が図れる。
 更に、後側フランジ面が前側横フレームと同様効果(車幅方向の剛性向上)を有するので、コスト低減が可能となる。
According to the invention, the rigidity of the rear support column in the vehicle width direction can be improved by the rear flange surface.
Furthermore, since the rear flange surface has the same effect (improved rigidity in the vehicle width direction) as the front lateral frame, cost can be reduced.
 また、本発明において好ましくは、前記天板には、車幅方向全域に亘って上下方向に変位した条状の溝が形成されているとよい。 In the present invention, preferably, the top plate is formed with a strip-shaped groove displaced in the vertical direction over the entire area in the vehicle width direction.
 かかる発明によれば、天板に車幅方向全域に亘って条状の溝を形成したので、天板の上方からの落下物に対する剛性向上が図れると共に、前側支柱及び後側支柱の車幅方向の剛性向上が図れる。 According to this invention, since the grooved groove is formed on the top plate over the entire vehicle width direction, the rigidity for falling objects from above the top plate can be improved, and the vehicle width direction of the front support and the rear support To improve the rigidity of the
 また、本発明において好ましくは、前記天板には、前記天板の運転席側面で、且つ運転席に対向した位置に、車幅方向に延在する補強部材を配設するとよい。 In the present invention, preferably, a reinforcing member extending in the vehicle width direction may be provided on the top plate at a position opposite to the driver's seat on the driver seat side surface of the top plate.
 かかる発明によれば、天板の運転席側に補強部材を配設するだけなので、天板の上方からの落下物に対する剛性向上が容易に図れる。 According to this invention, since only the reinforcing member is provided on the driver's seat side of the top plate, the rigidity can be easily improved with respect to falling objects from above the top plate.
 また、本発明において好ましくは、前記棒部材は、前記棒部材の軸線に直角方向の断面形状が長方形を成し、前記断面形状の長辺が上下方向に配置されているとよい。 In the present invention, preferably, the rod member has a rectangular cross-sectional shape in a direction perpendicular to the axis of the rod member, and the long side of the cross-sectional shape is disposed in the vertical direction.
 かかる発明によれば、断面形状が長方形の長辺を上下方向に配設することにより、長方形断面の長辺を水平方向に配設した場合より、棒部材間の隙間部が大きくなり、上方視界が広くなる。
 更に、長辺を上下方向に配置することで、上下方向の剛性が向上し、安全性が向上する。
 また、剛性を同一に保つ場合には、材料の重量軽減と、重量軽減に伴う材料費の低減が可能となる。
According to this invention, by arranging the long side of the rectangular shape in the vertical direction in the cross-sectional shape, the gap between the rod members becomes larger than when the long side of the rectangular cross section is arranged in the horizontal direction Becomes wider.
Furthermore, by arranging the long side in the vertical direction, the rigidity in the vertical direction is improved, and the safety is improved.
Further, in the case of keeping the rigidity the same, it is possible to reduce the weight of the material and to reduce the material cost associated with the weight reduction.
 このような構造にすることにより、荷物を載置したフォーク先端部が直接確認できると共に、雨天時に運転者が雨水を直接受けることを防止するフォークリフトのヘッドガード構造が提供される。 With such a structure, a fork head guard structure can be provided that can directly confirm the fork tip on which a load is placed and prevent the driver from directly receiving rainwater when it rains.
本発明が実施されるフォークリフトの概略側面図を示す。Fig. 1 shows a schematic side view of a forklift in which the present invention is implemented. 本発明が実施されるヘッドガード概略斜視図を示す。Fig. 1 shows a schematic perspective view of a head guard in which the present invention is implemented. 本発明のヘッドガード天井部の概略斜視図を示す。Fig. 2 shows a schematic perspective view of a head guard ceiling according to the invention; (A)は本発明のヘッドガード天井部の結合構造詳細図、(B)はガセットの溶接範囲図を示す。(A) is a joint structure detail drawing of the head guard ceiling part of this invention, (B) shows the welding range figure of gusset. (A)は前側支柱の車体への取付構造図、(B)は(A)のA-A断面図を示す。(A) shows a mounting structure of the front column on the vehicle body, (B) shows a cross-sectional view of (A) along AA. (A)は後側支柱の車体側への取付構造図を示し、(B)は後側支柱を車体に組付ける組立分解図を示す。(A) shows the attachment structural drawing to the vehicle body side of a rear side support | pillar, (B) shows the assembly exploded view which assembles a rear side support | pillar with a vehicle body.
 以下、本発明を図に示した実施形態を用いて詳細に説明する。
 但し、この実施形態に記載されている構成部品の寸法、材質、形状、その相対配置などは特に特定的な記載がない限り、この発明の範囲をそれのみに限定する趣旨ではなく、単なる説明例にすぎない。
Hereinafter, the present invention will be described in detail using embodiments shown in the drawings.
However, the dimensions, materials, shapes, relative positions, etc. of the components described in this embodiment are not intended to limit the scope of the present invention to only the specific description unless specifically described, and are merely illustrative. It is only
 図1は本発明が実施されるフォークリフトの概略側面図を示し、1はフォークリフト全体の側面図を示す。
 フォークリフト1は車体21と、車体21の前部に装着された荷物昇降装置7と、荷物昇降装置7によって持上げられた荷物が荷崩れして運転席に落下するのを防止するヘッドガード5と、フォークリフト1を移動させる駆動輪である前輪8と、車体21の後部に装着され、フォークリフト1の操舵輪である後輪9と、車体21の後部に装着され、荷物昇降装置7の荷物の重量によって後輪9が路面から離間しないようにすると共に、後輪9が路面に強く接触できる重量を有するカウンタウェイト3と、後輪9の操舵を行うハンドル6と、運転者が着座するシート10とで構成されている。
 尚、フォークリフト1は後輪9が操舵輪になっているので、カウンタウェイト3によって路面に強く当接させている。
FIG. 1 shows a schematic side view of a forklift according to the present invention, and 1 shows a side view of the entire forklift.
The forklift 1 includes a vehicle body 21, a load lifting device 7 mounted on a front portion of the vehicle body 21, and a head guard 5 for preventing the load lifted by the load lifting device 7 from collapsing and dropping to the driver's seat; It is attached to the front wheel 8 which is a driving wheel for moving the forklift 1 and to the rear of the vehicle body 21 and is attached to the rear wheel 9 which is a steering wheel of the forklift 1 and to the rear of the vehicle 21. The counterweight 3 has a weight that allows the rear wheel 9 to come into strong contact with the road surface, the steering wheel 6 for steering the rear wheel 9, and the seat 10 on which the driver is seated. It is configured.
In addition, since the rear wheel 9 is a steering wheel, the forklift 1 is strongly in contact with the road surface by the counterweight 3.
 車体21は、図示省略のエンジン、前輪駆動用の装置、油圧シリンダ等の油圧ポンプ、後輪の操舵装置等の走行および作業用装置が載置される車体21と、これら走行および作業用装置をカバーするエンジンカバー24とで構成されている。
 ヘッドガード5が装着される車体21は、車幅方向の基本断面が矩形状を成し、車両前後方向に延在すると共に、車幅方向に間隔を有した左右一対のサイドフレーム(図示省略)と、該左右一対のサイドフレーム間を車幅方向に連結すると共に、前後方向に間隔を有して配置された複数のクロスメンバ(図示省略)とで構成されている。
 左右一対のサイドフレーム間に走行するための装置および作業用装置が収納されるように構成されている。
 左右一対のサイドフレーム間をエンジンカバー24で覆っている。
 エンジンカバー24の上面に運転者が着座するシート10が配設されている。
 車体21はクロスメンバを介してカウンタウェイト3等が連結されるので、高強度、高剛性に形成されている。
The vehicle body 21 includes a vehicle 21 on which traveling and working devices such as an engine, a device for driving front wheels, a hydraulic pump such as a hydraulic cylinder, and a steering device for rear wheels are placed. It is comprised with the engine cover 24 to cover.
The vehicle body 21 to which the head guard 5 is attached has a rectangular basic cross section in the vehicle width direction, extends in the longitudinal direction of the vehicle, and has a pair of left and right side frames (not shown) And a plurality of cross members (not shown) arranged to connect the pair of left and right side frames in the vehicle width direction and to have an interval in the front and rear direction.
A device for traveling between the pair of left and right side frames and a working device are configured to be stored.
An engine cover 24 covers between a pair of left and right side frames.
A seat 10 on which the driver is seated is disposed on the upper surface of the engine cover 24.
The vehicle body 21 is formed with high strength and high rigidity because the counterweight 3 and the like are connected via the cross member.
 荷物昇降装置7は、荷物を載置する側面視がL字状のフォーク(爪)72と、フォーク72が取付けられるバックレスト73と、バックレスト73を上下方向に摺動自在に支持するマスト71と、バックレスト73を上下方向に摺動させるリフトチエーン(図示省略)と、マスト71の内側に、該マスト71に対し上下方向へ摺動自在に嵌合して、バックレスト73をマスト71の上端より更に上方へ持上げる補助マスト75と、マスト71及び補助マスト75を傾斜させフォーク72の先端を調整するチルトシリンダ(油圧)76と、を備えている。フォーク72の先端を上下に傾斜(調整)させて、フォーク72を荷物の下側へ挿入して、荷物をフォーク72に載置する。
 補助マスト75は図示しないリフトシリンダ(油圧)によってマスト71に対し上下に摺動する。
The luggage lifting device 7 has a fork (claw) 72 having an L-shaped side view for placing a luggage, a backrest 73 to which the fork 72 is attached, and a mast 71 for slidably supporting the backrest 73 vertically. And a lift chain (not shown) for sliding the backrest 73 in the vertical direction, and the backrest 73 fitted on the inside of the mast 71 slidably in the vertical direction with respect to the mast 71. An auxiliary mast 75 is provided to lift the upper end further upward, and a tilt cylinder (hydraulic pressure) 76 for tilting the mast 71 and the auxiliary mast 75 to adjust the tip of the fork 72. The tip of the fork 72 is inclined (adjusted) up and down, the fork 72 is inserted below the load, and the load is placed on the fork 72.
The auxiliary mast 75 slides up and down with respect to the mast 71 by a lift cylinder (hydraulic pressure) (not shown).
 図2にヘッドガード5の外観斜視図を示す。ヘッドガード5は、車体21の前部に車幅方向に離間して配置された左右一対の前側支柱51、51と、車体21の後部に車幅方向に離間して配置された左右一対の後側支柱52,52と、前後左右の四本の支柱の上端部に溶接された矩形状の天井部53とで構成されている。
 尚、支柱は前後共に対で配置されているが、説明を容易化するため支柱の符号は一つ記載とする。
 前側支柱51は支柱の軸線に対する直角方向の断面が、略矩形状の中空閉断面形状を成した柱状に形成されている。
 図1に示すように、前側支柱51の下部は、フォークリフト1の車体21の前部で、且つ前輪8の上部に取付けられている。
 前側支柱51下部の取付構造の詳細を図5(A)及び(B)に示す。
 前側支柱51の車体21側取付部構造は、車体21のフロントフェンダー21aの上面に起立した左右一対の前側取付ブラケット21bと、前側取付ブラケット21bの車両中側に配設され、前側取付ブラケット21bの車幅方向の剛性を維持する左右一対の補強ガセット21cと、左右一対の補強ガセット21c間を連結し、ハンドル6、走行及び荷物昇降作業用の操作レバー、運転用のメータ機器類等が装着されると共に、内部に補強用のインスツルメントリンフォースが配設されたインスツルメントパネル28(図1参照)等で構成されている。
The external-appearance perspective view of the head guard 5 is shown in FIG. The head guard 5 includes a pair of left and right front supports 51 51 disposed at a front portion of the vehicle body 21 in the vehicle width direction and a pair of left and right rear members disposed at a rear portion of the vehicle body 21 in a vehicle width direction. It is comprised by the side support | pillar 52 and 52 and the rectangular-shaped ceiling part 53 welded to the upper end part of four support | pillars of front and rear, right and left.
In addition, although a support | pillar is arrange | positioned by a pair with front and back, the code | symbol of a support | pillar is described as one in order to demonstrate easily.
The front support post 51 is formed in a columnar shape having a substantially rectangular hollow closed cross-sectional shape in a cross section in a direction perpendicular to the axis of the support post.
As shown in FIG. 1, the lower portion of the front support post 51 is attached to the front portion of the vehicle body 21 of the forklift 1 and to the upper portion of the front wheel 8.
The details of the mounting structure of the lower part of the front column 51 are shown in FIGS. 5 (A) and 5 (B).
The vehicle body 21 side attachment portion structure of the front support 51 is disposed on the vehicle middle side of the left and right front attachment brackets 21b standing up on the upper surface of the front fender 21a of the vehicle body 21 and the front attachment bracket 21b. A pair of left and right reinforcing gussets 21c for maintaining rigidity in the vehicle width direction and a pair of left and right reinforcing gussets 21c are connected, and the steering wheel 6, operation levers for traveling and load lifting operations, meter devices for driving are mounted And an instrument panel 28 (see FIG. 1) or the like in which a reinforcement instrument reinforcement is disposed.
 また、左右の前側取付ブラケット21bは、夫々が先端側を車体21の内側に傾斜させ、車両前後方向視で台形状に傾斜面を形成されている。この傾斜面は、前側取付ブラケット21bに前側支柱51を装着する際、上方からの挿入のガイドとすると共に、車体21の車幅方向中心線とヘッドガード5の車幅方向中心線との位置決めが容易になる。
 従って、傾斜面に沿うようにヘッドガード5の下端は、該下端の車幅方向寸法WLと上端の車幅方向寸法WUとの関係をWL>WUとなっている。
 前側取付ブラケット21bには、車幅方向に貫通した第1取付孔21dと、前側取付ブラケット21bの車体内側で第1取付孔21dに対応した位置に固着された締結部材22を構成するナット22dが溶着されている。
Further, each of the left and right front mounting brackets 21b has its tip end side inclined to the inside of the vehicle body 21, and has a trapezoidal inclined surface in a vehicle longitudinal direction. This inclined surface serves as a guide for insertion from above when attaching the front support post 51 to the front mounting bracket 21b, and the positioning of the vehicle width direction center line of the vehicle body 21 and the vehicle width direction center line of the head guard 5 is performed. It will be easier.
Accordingly, the lower end of the head guard 5 along the inclined surface has a relation of the lower end in the vehicle width direction WL and the upper end in the vehicle width direction WW> WU.
The front mounting bracket 21b includes a first mounting hole 21d penetrating in the vehicle width direction and a nut 22d constituting a fastening member 22 fixed at a position corresponding to the first mounting hole 21d inside the front mounting bracket 21b. It is welded.
 図5(B)は、図5(A)のA-A断面を示す。前側支柱51の下部には、第1取付孔21dに対向した面に上下方向に沿って2個の第2取付孔51aが併設されている。
 第2取付孔51aは、矩形状の断面の前側取付ブラケット21bに当接する面に穿設されている。
 また、前側支柱51の下部には、矩形状の断面の第2取付孔51aが穿設された面に対向した面に、第2取付孔51aの孔径より大きい作業用孔51bが穿設されている。
 作業用孔51bは、締結部材22を構成するボルト22a,スプリングワッシャ22b、及びプレーンワッシャ22cが挿通可能であると共に、ボルト22aを締付けるボックスレンチ(図示省略)が挿通する大きさの孔径になっている。
 前側支柱51は、締結部材22であるボルト22aにスプリングワッシャ22bとプレーンワッシャ22cを組付けて、作業孔51bを介してナット22dに螺合して、前側取付ブラケット21bに固定される。
 作業用孔51bは、第1ボルト22aを締付けた後に、樹脂製のプラグ23にて閉塞される。
FIG. 5 (B) shows an AA cross section of FIG. 5 (A). At the lower part of the front support post 51, two second mounting holes 51a are juxtaposed in the vertical direction on the surface opposite to the first mounting holes 21d.
The second mounting hole 51a is formed in a surface that contacts the front mounting bracket 21b having a rectangular cross section.
In the lower part of the front support 51, a working hole 51b larger than the hole diameter of the second mounting hole 51a is drilled on the surface opposite to the surface on which the second mounting hole 51a of the rectangular cross section is drilled. There is.
The working hole 51b has a hole diameter that allows insertion of the bolt 22a, the spring washer 22b, and the plain washer 22c constituting the fastening member 22 and a box wrench (not shown) for tightening the bolt 22a. There is.
The front support post 51 has the spring washer 22b and the plain washer 22c assembled to the bolt 22a, which is the fastening member 22, and is screwed to the nut 22d through the working hole 51b to be fixed to the front mounting bracket 21b.
The work hole 51b is closed by the resin plug 23 after the first bolt 22a is tightened.
 後側支柱52は、前側支柱51と同じように、支柱の軸線に対し直角方向の断面が、略矩形状の中空閉断面形状を成した柱状に形成されている。
 後側支柱52下部の車体21への取付構造について図6(A),(B)に示す。
 後側支柱52のフレーム(図6では図示省略)側取付部構造は、車体21の後部で、且つフレームの上面の車幅方向外側面に沿って配設された左右一対の第1支持ブラケット26と、フレームから上方へ延在した左右一対の第2支持ブラケット27とが配設されている。
 第1支持ブラケット26は、平面視が略矩形状断面を有する柱状を成している。
 ヘッドガード5の後側支柱52が取付けられる後側取付ブラケット25は、第1支持ブラケット26と第2支持ブラケット27との上部に架橋された状態で固着されている。
 従って、後側支柱52下部の取付部は、車両の上下および前後左右方向に対して高剛性を有した構造になっている。
Similar to the front support column 51, the rear support column 52 is formed in a columnar shape having a substantially rectangular hollow closed cross-sectional shape in a cross section perpendicular to the axis of the support support.
The mounting structure of the lower portion of the rear support 52 to the vehicle body 21 is shown in FIGS. 6 (A) and 6 (B).
The frame (not shown in FIG. 6) side attachment portion structure of the rear support 52 is a pair of left and right first support brackets 26 disposed at the rear of the vehicle body 21 and along the lateral surface of the upper surface of the frame in the vehicle width direction. And a pair of left and right second support brackets 27 extending upward from the frame.
The first support bracket 26 has a columnar shape having a substantially rectangular cross section in plan view.
The rear mounting bracket 25 to which the rear support post 52 of the head guard 5 is attached is fixed to the upper portion of the first support bracket 26 and the second support bracket 27 in a bridged manner.
Therefore, the mounting portion at the lower portion of the rear support 52 is structured to have high rigidity with respect to the vertical and horizontal directions of the vehicle.
 図6(A),(B)に示すように、後側取付ブラケット25は、第1支持ブラケット26と第2支持ブラケット27との上部に架橋する平面部25aと、平面部25aに連続し、下方へ折り曲げられた縦壁部25cと、後側支柱52が取付けられる突起25aとで形成されている。
 突起25aは後側支柱52の矩形状閉断面の前側面に当接するように配設されている。
 そして、突起25aには、後側支柱52の第3取付孔52aに対応する位置に、車両前後方向に貫通した第4取付孔25dが穿設されている。
 突起25aには、後側支柱52と接する面の反対側で、第4取付孔25dの軸線に合わせて締結部材22を構成するナット22dが配設されている。
 また、突起25aの先端部には、後側支柱52が突起25aに外嵌する際に、嵌合容易化のため、車両後方に傾斜(円弧状でもよい)したガイド部25eを設けてある。
As shown in FIGS. 6A and 6B, the rear mounting bracket 25 is continuous with the flat portion 25a bridged to the upper portion of the first support bracket 26 and the second support bracket 27, and the flat portion 25a. It is formed of a vertical wall portion 25c bent downward and a projection 25a to which the rear support post 52 is attached.
The protrusion 25 a is disposed to abut on the front side surface of the rectangular closed cross section of the rear side post 52.
A fourth attachment hole 25d penetrating in the longitudinal direction of the vehicle is bored in the projection 25a at a position corresponding to the third attachment hole 52a of the rear column 52.
On the side opposite to the surface in contact with the rear support 52, the protrusion 25a is provided with a nut 22d that constitutes the fastening member 22 in alignment with the axis of the fourth mounting hole 25d.
Further, at the tip end of the projection 25a, a guide portion 25e which is inclined (or may be arc-shaped) rearward of the vehicle is provided for facilitating the fitting when the rear support post 52 is fitted onto the projection 25a.
 図2、図3、図4に基づいて、天井部53の形状について詳細に説明する。
 天井部53は、前側支柱51の上端部と後側支柱52の上端部を連結する左右一対の縦フレーム55と、左右一対の前側支柱51間を連結する前側横フレーム54と、縦フレーム53の後端側から、該縦フレーム55の車両前後方向中間部まで延在し、下方へ屈曲した前側フランジ面56bを備えた天板56aと、前側フランジ面56bと前側横フレーム54との空間部に、一端が前側横フレーム54に固着され、他端が前側フランジ部56bに固着され、車幅方向に間隔を有して複数配設された棒部材57とで構成されている。
The shape of the ceiling portion 53 will be described in detail based on FIGS. 2, 3 and 4.
The ceiling 53 includes a pair of left and right vertical frames 55 connecting the upper end of the front support 51 and the upper end of the rear support 52, a front horizontal frame 54 connecting the pair of left and right front support 51, and the vertical frame 53. From the rear end side to a top plate 56a having a front flange surface 56b that extends to the vehicle longitudinal direction middle part of the vertical frame 55 and is bent downward, and a space between the front flange surface 56b and the front horizontal frame 54 One end is fixed to the front lateral frame 54, the other end is fixed to the front flange portion 56b, and a plurality of rod members 57 are provided at intervals in the vehicle width direction.
 図4に示すように、縦フレーム55と後側支柱52との結合は、固着(溶接)されている。
 更に、縦フレーム55と後側支柱52との結合には、略L字状厚板ガセット58が溶接されている。
 L字状の一方部58aが後側支柱52の上端部の内側に沿い、L字状の他方部58bが縦フレーム55の後端部の内側に沿って、配置されている。
 そして、L字状の一方部58a及び他方部58bの端部は、半円形状に形成されている。
 そして、略L字状厚板ガセット58と縦フレーム55及び後側支柱52とは、図4(B)に示すように略L字状厚板ガセット58の全周に亘って連続溶接している。
 これは、ガセット58の端縁を半円形状にすることにより、後側支柱52と縦フレーム53間に前後方向又は車幅方向に曲げ力が作用した際に、最も高い応力が作用する部分(一方部58a、他方部58b)に溶接終了部が発生しないようにしてある。
 溶接終了部は、溶接熱が周囲に逃げて、溶接の溶け込みが不十分になり易くなると共に、冷却が速く溶接強度の低下が発生し易い。
 コーナ部がない(半円形状)ため、部分的に溶接熱が入り過ぎることにより発生する周囲との溶接強度の不均一化を防止できると共に、円弧状にすることにより、断面剛性の変化傾斜が緩やかになり、応力集中の発生が防止できる。 
 尚、縦フレーム55と後側支柱52との結合構造について説明したが、縦フレーム55と前側支柱51との結合、及び前側横フレーム54と前側支柱51との結合も同様構造にて実施しているので説明は省略する。
As shown in FIG. 4, the connection between the vertical frame 55 and the rear support 52 is fixed (welded).
Further, a substantially L-shaped thick gusset 58 is welded to the connection between the vertical frame 55 and the rear support 52.
An L-shaped one portion 58 a is disposed along the inside of the upper end of the rear support 52 and the other L-shaped portion 58 b is disposed along the inside of the rear end of the vertical frame 55.
The end portions of the L-shaped one portion 58a and the other portion 58b are formed in a semicircular shape.
The substantially L-shaped thick gusset 58, the vertical frame 55, and the rear support 52 are continuously welded all around the substantially L-shaped thick gusset 58 as shown in FIG. 4B. .
This is because the edge of the gusset 58 has a semi-circular shape, and the portion where the highest stress acts when a bending force is applied between the rear support 52 and the vertical frame 53 in the front-rear direction or the vehicle width direction ( It is made for the welding completion part not to occur in one part 58a and the other part 58b).
At the weld end portion, the welding heat escapes to the periphery and the welding penetration tends to be insufficient, and the cooling is quick and the welding strength tends to be reduced.
Since there is no corner part (semi-circular shape), it is possible to prevent uneven welding strength with the surroundings caused by partial excessive welding heat, and by making it arc-shaped, the slope of change in cross-sectional rigidity is It becomes gentle and can prevent the occurrence of stress concentration.
Although the connection structure between the vertical frame 55 and the rear support column 52 has been described, the connection between the vertical frame 55 and the front support column 51 and the connection between the front horizontal frame 54 and the front support column 51 are also implemented similarly. Therefore, the explanation is omitted.
 図3及び図4に示すように、天井部53は、天板56と、該天板56と前側横フレーム54との間に配設された複数の棒部材57とで構成されている。
 天板56は、運転者が雨に濡れるのを防止する平面状に形成され天井部分56aと、天井部分56aに連続して車両前後方向前側が下方へ屈曲した前側フランジ面56bと、天井部分56aに連続して車両前後方向後側が下方へ屈曲した後側フランジ面56cと、左右一対の縦フレーム55の上面に溶接する溶接代部56dと、天井部分56aの運転者側面に、天井部分56aとで前後方向断面が矩形状の中空閉断面を成すと共に、車幅方向全域に亘り配設された補強部材56eとで構成されている。
As shown in FIG. 3 and FIG. 4, the ceiling portion 53 is configured by a top plate 56 and a plurality of bar members 57 disposed between the top plate 56 and the front lateral frame 54.
The top plate 56 is formed in a flat shape to prevent the driver from getting wet, and has a ceiling portion 56a, a front flange surface 56b continuously bent on the front side in the vehicle longitudinal direction downward to the ceiling portion 56a, and a ceiling portion 56a. The rear flange surface 56c is bent downward at the rear in the vehicle longitudinal direction continuously, the welding margin portion 56d welded to the upper surface of the pair of left and right vertical frames 55, and the ceiling portion 56a on the driver side of the ceiling portion 56a As well as forming a hollow closed cross section having a rectangular cross section in the front-rear direction, it is constituted by a reinforcing member 56e disposed over the entire vehicle width direction.
 前側フランジ面56bの車両前後方向の位置は、図1に示すように、運転者がシート10に正規の着座状態時、フォークリフト1のフォーク72が最上位置に達した時のフォーク72の先端72aが直接確認できる部分としてある。
 即ち、前側フランジ面位置FPは、運転者のアイポイントIPとフォーク72の先端72aとの連結線ILに、前側フランジ面56bの下端縁56bpが接する位置より少なくとも車両前後方向後側に位置するようにしてある。
 従って、前側フランジ面位置FPは、ヘッドガード5の高さによっても変化してくる。
 尚、正規の着座状態とは、標準の大きさの運転者がシート10に着座して、且つフォークリフト1の運転操作が容易に可能な姿勢である。
The position of the front flange surface 56b in the vehicle longitudinal direction is, as shown in FIG. 1, the tip 72a of the fork 72 when the fork 72 of the forklift 1 reaches the uppermost position when the driver is seated properly on the seat 10. It is a part that can be checked directly.
That is, the front flange surface position FP is positioned at least on the rear side in the vehicle longitudinal direction from the position where the lower end edge 56bp of the front flange surface 56b contacts the connecting line IL between the driver's eyepoint IP and the tip 72a of the fork 72 It is.
Therefore, the front flange surface position FP also changes depending on the height of the head guard 5.
The normal sitting state is a posture in which a driver of a standard size is seated on the seat 10 and the driving operation of the forklift 1 can be easily performed.
 棒部材57は、棒部材57の軸線に対して直角方向の断面が長方形状で中実の閉断面形状を成している。
 棒部材57は、長方形状の長辺が上下方向に配置されて、一端が前側横フレーム54に、他端が前側フランジ面56bに夫々に固着(溶接)されている。
 従って、棒部材57は、上下方向に長い(高い)状態で固定されているので、上方からの落下物に対して、高剛性を維持できる。
 更に、車幅方向が長方形の短辺方向になるので、棒部材57間の隙間がその分大きくできるので、上方視界が広くなる効果を有している。
 尚、本実施形態では、棒部材57を厚板の長方形断面としたが、長方形の中空材にして、長辺を上下方向に配設するようにしても、同様の効果を得ることができる。
The rod member 57 has a rectangular cross section in a direction perpendicular to the axis of the rod member 57 and has a solid closed cross sectional shape.
The rod member 57 has rectangular long sides arranged in the vertical direction, and one end is fixed (welded) to the front side horizontal frame 54 and the other end to the front flange surface 56b.
Therefore, since the rod member 57 is fixed in a vertically long (high) state, high rigidity can be maintained with respect to a falling object from above.
Furthermore, since the vehicle width direction is the short side direction of the rectangle, the gap between the rod members 57 can be increased by that amount, which has the effect of widening the upper view.
In the present embodiment, although the rod member 57 is a rectangular cross section of a thick plate, the same effect can be obtained by arranging the long side in the vertical direction by using a rectangular hollow material.
 図4に基づいて、天板56を縦フレーム55及び後側支柱52との結合構造について説明する。
 天板56は、左右一対の縦フレーム55の上面に天板56の車幅方向端部のフランジ56dを載置させる。
 フランジ56dは左右一対の縦フレーム55の上面に車両前後方向全域に亘り隅肉溶接W3される。
 更に、前側フランジ面56bの車幅方向端縁と縦フレーム55の内側面とを、上下方向に隅肉溶接W4される。
 また、天板56の後側フランジ面56cの車幅方向端縁は、縦フレーム55と後側支柱52とを連結しているガセット58の車幅方向内側面に、上下方向に隅肉溶接W5されている。
 天板56は、天板の天井部分56a、前側フランジ面56b、後側フランジ面56c、及び左右の縦フレーム55,55とで、下側が開口した箱状に構成されている。
 従って、天板56は天井部分56aの運転席側に配設された補強部材56eと上述の箱状に構成とにより、高剛性のヘッドガード5となり、特に上下方向に対しては特に高い剛性を有している。
 尚、本実施形態では、天井部分56aを平板状にしたが、当該部を車両前後方向断面を上下に変位させた波状(円弧又は三角形)、台形にして、車幅方向に条状の溝を形成してもよい。
 このような構造にすることにより、天井部分56a全体が上下方向の剛性が高くなり、
補強部材56eが不要となり、材料コスト及び重量の軽減が可能となる。
The connection structure of the top plate 56 with the vertical frame 55 and the rear support 52 will be described based on FIG. 4.
The top plate 56 mounts the flange 56 d of the end portion in the vehicle width direction of the top plate 56 on the upper surface of the pair of left and right vertical frames 55.
The flange 56d is fillet welded W3 on the upper surface of the pair of left and right vertical frames 55 all over the longitudinal direction of the vehicle.
Furthermore, a fillet weld W4 is performed in the vertical direction between the vehicle width direction end edge of the front flange surface 56b and the inner side surface of the vertical frame 55.
Further, an end edge of the rear flange surface 56c of the top plate 56 in the vehicle width direction is fillet welded W5 in the vertical direction to an inner side surface of the gusset 58 connecting the vertical frame 55 and the rear support 52. It is done.
The top plate 56 is formed in a box shape whose lower side is opened by the ceiling portion 56a of the top plate, the front flange surface 56b, the rear flange surface 56c, and the left and right vertical frames 55, 55.
Therefore, the top plate 56 becomes the high rigidity head guard 5 by the reinforcing member 56e disposed on the driver's side of the ceiling portion 56a and the above-described box shape, and particularly the high rigidity in the vertical direction. Have.
In this embodiment, although the ceiling portion 56a is flat, the groove is formed in a wave shape (a circular arc or a triangle) or a trapezoid in which the cross section in the vehicle longitudinal direction is vertically displaced. You may form.
With such a structure, the rigidity of the entire ceiling portion 56a in the vertical direction is increased.
There is no need for the reinforcing member 56e, and material cost and weight can be reduced.
 このように、天井板56を下側が開口した箱状に形成することにより、高剛性のヘッドガード5とすることができると共に、運転者のヘッドクリアランス(運転者の頭部と天板56との隙間)HCを大きくすることができ、居住性が改善され商品性向上につながる。
 更に、天板56の前側フランジ56bを、運転者のアイポイントIPと、フォーク72が最上位置に達した時のフォークの先端部72aとを結ぶ連結線ILより車両前後方向後側に位置させることにした。
 従って、荷物を載置したフォークが最上位置に達した時にフォークの先端部が直接確認できると共に、雨天時に運転者に雨水を直接受けることを防止するフォークリフトのヘッドガード構造とすることができた。
As described above, by forming the ceiling plate 56 into a box shape with the lower side opened, the head guard 5 can be made highly rigid and the head clearance of the driver (the driver's head and the top plate 56 Gap) HC can be increased, and the habitability is improved, leading to the improvement of the productability.
Further, the front flange 56b of the top plate 56 is positioned on the rear side in the vehicle longitudinal direction with respect to the connecting line IL connecting the driver's eye point IP and the fork tip 72a when the fork 72 reaches the uppermost position. I made it.
Therefore, the fork tip can be directly confirmed when the fork loaded with the load reaches the uppermost position, and the head guard structure of the forklift can prevent the driver from receiving the rain water directly when it is raining.
 フォークリフトの車体にヘッドガード取付ける取付構造として提供できる。  It can be provided as a mounting structure for mounting a head guard on the body of a forklift.
   1    フォークリフト
   3    カウンタウェイト
   5    ヘッドガード
   6    ハンドル
   7    荷物昇降装置
   8    前輪(駆動輪)
   9    後輪(操舵輪)
   21   車体
   21b  前側取付ブラケット
   21d  第1取付孔
   22   締結部材
   25   後側取付ブラケット
   25a  突起
   25d  第4取付孔
   51   前側支柱
   52   後側支柱
   54   前側横フレーム
   55   縦フレーム
   56   天板
   56a  天井部分
   56b  前側フランジ面
   56c  後側フランジ面
   57   棒部材
   58   ガセット
1 forklift 3 counter weight 5 head guard 6 steering wheel 7 luggage lifting device 8 front wheel (drive wheel)
9 Rear wheel (steering wheel)
Reference Signs List 21 vehicle body 21b front mounting bracket 21d first mounting hole 22 fastening member 25 rear mounting bracket 25a projection 25d fourth mounting hole 51 front column 52 rear column 54 front horizontal frame 55 vertical frame 56 top plate 56a ceiling portion 56b front flange surface 56c Rear flange surface 57 Bar member 58 Gusset

Claims (6)

  1.  フォークリフトの車体前部に装着され、車幅方向に離間して配置された左右一対の前側支柱と、
     前記車体の後部に装着され、車幅方向に離間して配置された左右一対の後側支柱と、
     前記前側支柱の上端部と前記後側支柱の上端部とを前記車体の前後方向に連結する左右一対の縦フレームと、
     前記左右一対の前記前側支柱の上端部を車幅方向に連結する前側横フレームと、
     前記左右一対の縦フレーム間に架橋すると共に、前記縦フレームの後端部から前記車体の前方向に延在し、前端が前記縦フレームの前後方向中間部に位置して、前記前端に連続して下方へ屈曲した前側フランジ面を有する天板と、
     一端が前記前側横フレームに固着され、他端が前記前側フランジ面に固着されると共に、車幅方向に間隔を有して複数配設された棒部材と、を備えたことを特徴とするフォークリフトのヘッドガード構造。
    A pair of left and right front struts mounted on the front of the forklift body and spaced apart in the vehicle width direction;
    A pair of left and right rear struts attached to the rear of the vehicle body and spaced apart in the vehicle width direction;
    A pair of left and right vertical frames connecting an upper end portion of the front support post and an upper end portion of the rear support post in a longitudinal direction of the vehicle body;
    A front side horizontal frame connecting upper ends of the pair of left and right front support columns in the vehicle width direction;
    The bridge extends between the left and right longitudinal frames and extends from the rear end of the longitudinal frame to the front of the vehicle body, and the front end is located in the longitudinal middle of the longitudinal frame and is continuous with the front end A top plate having a front flange surface bent downward;
    Forklift characterized in that one end is fixed to the front lateral frame, and the other end is fixed to the front flange surface, and a plurality of rod members are arranged at intervals in the vehicle width direction. Head guard structure.
  2.  前記前側フランジ面の車両前後方向位置は、荷物を載置するフォークの先端が最上位置に達した時に、前記棒部材間の間隔部を介して、少なくとも正規着座位置に運転者が着座した時の前記運転者のアイポイントと前記フォークの先端とを結んだ線より後方に位置していることを特徴とする請求項1記載のフォークリフトのヘッドガード構造。 The position of the front flange surface in the vehicle longitudinal direction is at least when the driver is seated at the regular seating position via the gap between the rod members when the tip of the fork for placing the load reaches the uppermost position. 2. The head guard structure of a forklift according to claim 1, wherein the head guard structure is located rearward of a line connecting the eye point of the driver and the tip of the fork.
  3.  前記天板の前記後端部は、下方へ屈曲した後側フランジ面を有し、前記後側フランジ面の車幅方向の両端縁は、前記一対の後側支柱に夫々固着されていることを特徴とする請求項1又は2のいずれかに記載のフォークリフトのヘッドガード構造。 The rear end portion of the top plate has a rear flange surface bent downward, and both end edges in the vehicle width direction of the rear flange surface are fixed to the pair of rear columns, respectively. The head guard structure of a forklift according to any one of claims 1 or 2, characterized in that
  4.  前記天板には、車幅方向全域に亘って上下方向に変位した条状の溝が形成されていることを特徴とする請求項1乃至3のいずれかに記載のフォークリフトのヘッドガード構造。 The head guard structure of a forklift according to any one of claims 1 to 3, wherein the top plate is formed with a linear groove displaced in the vertical direction over the entire area in the vehicle width direction.
  5.  前記天板には、前記天板の運転席側面で、且つ運転席に対向した位置に、車幅方向に延在する補強部材を配設したことを特徴とする請求項1乃至4のいずれかに記載のフォークリフトのヘッドガード構造。 The reinforcement member extended in the vehicle width direction was arrange | positioned by the said driver's seat side surface of the said top plate, and the position facing the driver's seat in the said top plate, It is characterized by the above-mentioned. Head guard structure of the forklift described in.
  6.  前記棒部材は、前記棒部材の軸線に直角方向の断面形状が長方形を成し、前記断面形状の長辺が上下方向に配置されていることを特徴とする請求項1乃至5のいずれかに記載のフォークリフトのヘッドガード構造。 The rod member has a rectangular cross-sectional shape in a direction perpendicular to the axis of the rod member, and the long side of the cross-sectional shape is disposed in the vertical direction. Head guard structure of the described forklift.
PCT/JP2012/080958 2012-11-29 2012-11-29 Forklift head-guard structure WO2014083659A1 (en)

Priority Applications (5)

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JP2014549708A JPWO2014083659A1 (en) 2012-11-29 2012-11-29 Forklift head guard structure
BR112015007276A BR112015007276A2 (en) 2012-11-29 2012-11-29 forklift top guard structure
CN201280075234.1A CN104520227A (en) 2012-11-29 2012-11-29 Forklift head-guard structure
EP12889009.2A EP2915771B1 (en) 2012-11-29 2012-11-29 Forklift head-guard structure
PCT/JP2012/080958 WO2014083659A1 (en) 2012-11-29 2012-11-29 Forklift head-guard structure

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CN104520227A (en) 2015-04-15
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EP2915771B1 (en) 2020-07-22
BR112015007276A2 (en) 2017-07-04
EP2915771A4 (en) 2016-07-06

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