JP6525787B2 - Suspension system for industrial vehicles - Google Patents

Description

  The present invention relates to a vehicle suspension system for an industrial vehicle having a head guard at a driver's seat.

  For example, in a large factory or port facility, industrial vehicles such as forklifts and shovel loaders are recovered between a low place work site (wharf) and a high place work site (Hangakura) by a ship or crane installed on the quay. For example, Patent Document 1 proposes that a hanger be attached to a vehicle body for transportation. In Patent Document 1, a gate-shaped suspension frame is attached to the vehicle body on both sides of the driver's seat via a bracket, and a pair of left and right support rods adjustable in length is connected between the suspension frame and the rear of the vehicle body. Structures have been proposed.

Unexamined-Japanese-Patent No. 2003-81585

  However, in the above configuration, since the suspension frames are provided upright on both sides of the driver's seat, getting in and out of the driver's seat is restricted, and the visibility from the driver's seat is blocked, which may interfere with the operation of the vehicle. was there.

  An object of the present invention is to solve the above-mentioned problems, and to provide a vehicle body suspension system for an industrial vehicle, which is easy to get on and off, and can reduce the limitation of visibility.

The invention according to claim 1 is a vehicle suspension system for an industrial vehicle provided with a head guard that covers the upper side of a driver's seat installed on the vehicle body,
A suspension frame formed in a gate shape in a front view by a pair of left and right suspension members erected on both sides of the vehicle body, and a horizontal bridge member connecting the upper end sides of the suspension members to each other;
A hook engaging member provided on the upper end side of the suspension frame, with which the vehicle body lifting hook is engaged, and a hook that is extended in the front-rear direction from the upper end side of the suspension member and the vehicle body lifting tool is engaged At least one of the
A reinforcement member connecting an upper end side of the suspension frame and a rear portion of the vehicle body;
The suspension member is provided with a head guard support portion for connecting and supporting the head guard, and the suspension member is configured to also serve as a rear post of the head guard.

  In the conventional head guard, the left and right rear posts for supporting the roof portion are erected, and when the suspension device is provided, a total of four members of the rear post and the suspension members are erected on the vehicle body It will be. According to the above configuration, when the suspension member also serves as the rear post of the head guard, the restriction of the side view from the driver's seat and the rear view can be minimized, and it becomes an obstacle to getting in and out of the driver's seat. There is no Further, the members erected on the vehicle body can be reduced to simplify the vehicle body.

  Further, in the above configuration, the head guard supporting portion is provided with an elastic member to elastically support the head guard on the suspension member, thereby lifting the head guard from the suspension member and the head guard from the vehicle body at the time of landing or landing. The impact force applied to the suspension member can be alleviated and reduced, and damage and damage to the head guard and its peripheral members can be prevented in advance.

  Furthermore, in each of the above-described configurations, a hinge portion that rotatably supports the hook member in the front-rear direction of the vehicle is interposed between the upper end portion of the suspension frame and the base end portion of the hook member Thus, the hook member can be folded backward by a predetermined angle to allow folding of the hook member, thereby enabling travel of the industrial vehicle in a warehouse or aisle whose height is limited, and the range of use of the industrial vehicle can be expanded.

  According to the present invention, since the suspension member doubles as the rear post of the head guard, the rear view from the driver's seat is well maintained, and there is no hindrance to getting on and off the driver's seat.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows Example 1 of the vehicle body suspension apparatus of the forklift concerning this invention. It is a schematic half section view of a rear view of a vehicle body suspension system. It is a side surface fragmentary sectional view showing a head guard supporter. It is a front fragmentary sectional view which shows a head guard support part. It is a side view which shows Example 2 of the vehicle body suspension system of the forklift concerning this invention. It is a rear view of a vehicle body suspension system. It is a side view which shows Example 3 of the vehicle body suspension system of the forklift concerning this invention. It is a rear view of a vehicle body suspension system.

Example 1
Hereinafter, Example 1 of a vehicle body suspension system for a forklift according to the present invention will be described with reference to FIGS. 1 to 4.

  As shown in FIGS. 1 and 2, the forklift is provided with a pair of left and right driving front wheels 12 at the front of the vehicle body 11 and a pair of left and right steering rear wheels 13 at the rear of the vehicle body 11. Further, a lifting device (loading device) 16 is provided which lifts and lowers the fork 14 along a plurality of inner and outer lifting masts 15 erected at the front of the vehicle body 11. Further, a driver's seat 17 is installed at the front of the upper surface of the vehicle body 11, and a head guard 18 covering the upper side of the driver's seat 17 is provided.

  A pair of left and right suspension frames (suspension members) 22 are provided upright on both side rear portions of the driver's seat 17 of the vehicle body 11 via the bottom hinges 23, respectively. A horizontal frame (horizontal frame member) 24 is stretched over the upper ends of the left and right suspension frames 22, and a suspension frame having a gate-like front view is formed by the left and right suspension frames 22 and the horizontal frame 24. 25 are formed. The bottom hinge 23 is provided with a pin 23a in the vehicle width direction and a spherical bush (not shown) fitted on the pin 23a, and the shift of the position of the center of gravity G of the vehicle body 11 can be tolerated within a predetermined range. It is configured to release welding distortion at time. Here, the attachment position of the bottom hinge 23 is preferably a position immediately above the center of gravity G of the vehicle body 11 or a position near the position.

  A hook engaging member 26 is provided at the upper end portion of the suspension frame 25. The hook engaging member 26 can hold the vehicle body lifting hook F, which is a lifting hook for a loading claim installed on a ship or the like, for example. The hook engaging member 26 includes a pair of lower end straight portions 26 a erected and fixed to the upper end portion of the suspension frame 22 and inclined portions inwardly bent at predetermined angles from the lower end straight portions 26 a. A hook frame 26A having a chevron shape in a front view is formed by an arc-shaped hooking portion 26c connecting the upper end portions of the left and right inclined portions 26b. Further, the connecting frame 26B is connected across the lower end straight portions 26a on the left and right.

  Reinforcing members 27 are respectively connected to the suspension frame 25 between the upper end sides of the left and right suspension frames 22 and the rear portion of the vehicle body 11. These reinforcing members 27 include a projecting portion 27 a that protrudes rearward from the upper end portion of the left and right suspension frames 22, a vehicle side bracket 27 c attached to a rear upper surface of the vehicle body 11 via a tie rod 27 b, Between the rear end portion of the portion 27a and the vehicle body side bracket 27c, there is provided a connecting rod 27d which is respectively connected via a horizontal pin in the vehicle body width direction and whose length can be adjusted.

  The hook engaging member 26 is provided with a folding mechanism 28. In this folding mechanism 28, a folding hinge (hinge portion) 28A is connected between the upper end portion and the lower end straight portion 26a of the suspension frame 22 so as to be foldably connected via a pin 28a in the vehicle body width direction. There is. With this folding hinge 28A, the hook engaging member 26 is erected and used in an upright posture for hanging and a storage posture in which the vehicle height is reduced by reclining it by a predetermined angle rearward, for example, as shown in FIG. It can be pivoted between A hanging frame fixing tool 28B for holding the posture of the hanging frame 25 in the storage posture is provided. The suspension frame fixing tool 28B includes, for example, a rope body (a wire, a chain, a band, etc.) 28c for connecting the suspension frame 22 and the brackets 28a and 28b respectively provided on the base end side of the hook frame 26A. From the stopper member 28e which is provided in the body 28c and can be tightened and which can be tightened (chain block etc.) 28d and the overhanging portion 27a of the reinforcing member 27 to support and restrict the storage posture of the hook engaging member 26 from below. Become.

  The head guard 18 has a roof portion 18A covering the upper part of the driver's seat 17 and a pair of left and right front posts 18B which are erected rearward from the front portion of the vehicle body 11 and support the front portion of the roof portion 18A. The rear portion of the roof portion 18A is elastically supported by the left and right suspension frames 22 via the head guard support portions 29, and the left and right suspension frames 22 double as left and right rear posts. As a result, only the suspension frames 22 on the left and right sides and the rear view from the driver's seat 17 can be provided, and the rear and side views can be improved to improve the work efficiency.

  As shown in FIGS. 3 and 4, in the head guard support portion 29, a receiving plate 29a is protruded from the inner surfaces of the left and right suspension frames 22 via reinforcing plates 29b, and an elastic supporting portion is formed on the receiving plate 29a. 29c is provided. On the other hand, in the head guard 18, a plurality of square pipe-like front and rear frames 18C are attached to the bottom surface of the roof portion 18A in the vehicle longitudinal direction. The elastic support portion 29c includes a rubber plate 29d which is an elastic body disposed on the receiving plate 29a, a pressing bottom plate 29f fixed between the receiving plate 29a with the rubber plate 29d interposed between the connecting bolt 29e and the pressing plate A holding plate 29h is provided on the bottom plate 29f and is fixed by a mounting bolt 29g while holding both sides of the front and rear frames 18C. In place of the rubber plate 29d, a leaf spring or a coil spring may be used.

  Therefore, the weight of the rear portion of the roof portion 18A can be supported by the head guard support portion 29. When the vehicle body 11 is suspended, lifted, or landed, the shock transmitted to the suspension frame 22 from the vehicle body 11 via the head guard 18 or the shock transmitted from the suspension frame 22 to the head guard is rubber. It can be absorbed and buffered by the plate 29d, and damage to the roof portion 18A, the front post 18B, its peripheral members and the like can be prevented in advance.

  Although a pair of left and right head guard support portions 29 are provided in FIG. 2, as shown in FIG. 6, the support plate 29a is spanned across the suspension frames 22 on the left and right sides, and the head guards are supported at three or more locations. The portions 29 can be provided to elastically support the front and rear frames 18C, respectively, to effectively buffer the impact force.

  In the first embodiment, when the vehicle body 11 is lifted, the hook engaging member 26 is in the upright position, and the vehicle body lifting hook F of the crane is engaged with the hooking portion 26 c of the hook engaging member 26. Then, the vehicle body 11 is lifted via the suspension frame 22 and is lifted, transported, and landed at a target position of a predetermined height. At this time, the inclination of the vehicle body 11 due to the displacement of the center of gravity G of the vehicle body 11 is absorbed and supported by the reinforcing member 27 and the bottom hinge 23. In addition, since the impact during lifting, hanging or landing is mitigated by the head guard supporting portion 29, the head guard 18 and its peripheral members are not damaged.

  In addition, the hook engaging member 26 is folded backward around the folding hinge 28A by using the folding mechanism 28 to travel in a passage, a hold, or a warehouse whose height is limited by being in the storage posture. Can be used to improve versatility and functionality.

  According to the first embodiment, the suspension frame 22 doubles as the rear post of the head guard 18, so that no obstacle to getting in and out of the driver's seat 17 is required, and a side or rear view from the driver's seat 17 is required. There is no limitation to the above. Further, the members erected on the vehicle body 11 can be reduced, and the vehicle body 11 can be simplified.

  Furthermore, when the suspension frame 22 is lifted or suspended, the impact force applied to the head guard 18 can be alleviated or reduced by the head guard support portion 29 and the head guard 18 or other peripheral members when suspended or suspended. Etc. can be prevented in advance.

  Furthermore, since the hook engaging member 26 can be folded in the storage posture in which it is folded backward, the industrial vehicle can be used in a warehouse or a passage whose height is limited, and versatility can be ensured.

Example 2
A second embodiment of the vehicle suspension system for a forklift will be described with reference to FIGS. 5 and 6. The vehicle body suspension apparatus 31 is obtained by removing the folding mechanism from the first embodiment. The same members as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The hook engaging member 36 is attached to the upper end of the suspension frame 22 with the base end of the sloped portion 36b of a gentle slope directly upright, and the hooked portion 36c on the arc between the tip ends of the sloped portion 36b It is formed in a connected mountain shape. And reinforcement board 36d is attached to right-and-left both sides before and behind the base end side of inclined section 36b, respectively.

  Further, a reinforcing member 37 connected between the left and right suspension frames 22 and the rear of the vehicle body 11 is a suspension side bracket 37a attached to the rear from the top of the left and right suspension frames 22 and a tie rod at the rear of the vehicle body 11. A connecting rod 37d is connected between a vehicle body side bracket 37c attached via 37b and a horizontal pin in the width direction.

According to the vehicle body suspension system 31 of the second embodiment, the same operation and effect as those of the first embodiment can be obtained except for the operation and effects of the folding operation of the hook engaging member 36.
[Example 3]
A third embodiment of the vehicle suspension system for a forklift will be described with reference to FIGS. 7 and 8. In addition to the hook engaging member 26, the vehicle body suspension device 41 is provided with a hook 42 capable of being latched by a vehicle body lifting tool in the second embodiment. The same members as those of the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted.

  In the first and second embodiments, a loading crane is used as an apparatus for suspending the vehicle body 11, and the vehicle body lifting hook F is engaged with the hook engaging member 26 to suspend the vehicle body 11. In addition to the vehicle body lifting hook F, a coil lifter can be used to lift and transport the coiled winding body which is a cylindrical weight in a ship or a factory. The coil lifter inserts the insertion member (car body lifting tool) A into the hollow portion of the coil winding body from both sides, and directly lifts the coil winding body for lifting and transportation.

  In the third embodiment, on the upper portions of the left and right suspension frames 22, hooks 42 which can be inserted by inserting the insertion members A from below are provided. These hooks 42 are supported so that the overhang frame 42c can be tilted in a predetermined range via the pin 42b in the vehicle width direction between the suspension frame 22 and the cover plate 42a attached to the outer surface thereof. They are respectively protruded in the front and rear direction. In these overhanging frames 42c, concave portions 42d in which the insertion member A is engaged are formed on the front and rear of the lower side. Further, a spring 42e which is a biasing member for holding the overhang frame 42c in a horizontal posture is connected between the overhang frame 42c and the suspension frame 22.

  Therefore, the insertion members A are inserted into the lower part of the overhanging frame 42c by raising the pair of front and rear two sets of insertion members A from the outside of both sides of the vehicle body 11 with the suspension frame 22 interposed therebetween. , And the vehicle body 11 can be lifted by the insertion member A via the overhang frame 42c.

According to the third embodiment, the coil lifter can be used to suspend the vehicle body by the fastener 42, and the same operation and effect as the second embodiment can be achieved.
In the first to third embodiments, a forklift is described as an industrial vehicle. However, an industrial vehicle such as a wheel loader or a shovel loader having a head guard on the vehicle body 11 may be used.

F Body Lifting Hook A Insertion Member (Car Body Lifting Tool)
11 Vehicle body 17 Driver seat 18 Head guards 21, 31, 41 Vehicle suspension system 22 Suspension frame (hanging member)
23 bottom hinge 24 horizontal frame (horizontal frame member)
25 Hanging frame 26, 36 Hook engaging member 27 Reinforcing member 28 Folding mechanism 28A Folding hinge (hinge part)
29 Head guard support 29d Rubber plate 42 Hook 42c Overhang frame 42d Concave

Claims (3)

A vehicle suspension system of an industrial vehicle provided with a head guard that covers the upper side of a driver's seat installed on the vehicle body,
A suspension frame formed in a gate shape in a front view by a pair of left and right suspension members erected on both sides of the vehicle body, and a horizontal bridge member connecting the upper end sides of the suspension members to each other;
A hook engaging member provided on the upper end side of the suspension frame, with which the vehicle body lifting hook is engaged, and a hook that is extended in the front-rear direction from the upper end side of the suspension member and the vehicle body lifting tool is engaged At least one of the
A reinforcement member connecting an upper end side of the suspension frame and a rear portion of the vehicle body;
A vehicle body suspension system for an industrial vehicle, comprising a head guard support portion for connecting and supporting a head guard to a suspension member, and the suspension member also serving as a rear post of the head guard. The vehicle suspension system for an industrial vehicle according to claim 1, wherein an elastic member is interposed in the head guard support portion, and the head guard is elastically supported by the suspension member. Between the upper end portion of the suspension frame and the proximal end portion of the hook member, a hinge portion rotatably supporting the hook engaging member in the front-rear direction of the vehicle is interposed, and the hook member is held by the hinge portion. The vehicle suspension system for an industrial vehicle according to claim 1 or 2, wherein the vehicle suspension is folded backward at a predetermined angle.

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