JP5140882B2 - Work vehicle - Google Patents

Description

    The present invention relates to a work vehicle including a protect frame surrounding an operator seated on a seat, and more particularly to a structure of a head guard in the protect frame.

    A forklift (forklift truck) A which is an embodiment of the work vehicle shown in FIG. 10 includes a vehicle body B and a work machine M installed in front of the vehicle body B. Incidentally, the direction indicated by the arrow X in the figure is the front of the forklift A.

  The forklift A is a battery-driven forklift (battery forklift), and a seat S on which an operator (not shown) sits is installed on the upper part of the bonnet C defined in the rear half of the vehicle body B. Yes.

  Further, the vehicle body B is provided with a protect frame F surrounding an operator (not shown) seated on the seat S. The protect frame F includes a pair of left and right front stays Ff, a roof stay Ft, and a rear stay Fr. And a head guard G that covers the overhead of an operator (not shown).

  The head guard G is formed by joining (welding) various members made of a metal material to each other, and as shown in FIGS. 11 and 12, the left side member Gl extending in the front-rear direction of the vehicle body B. And a right side member Gr, and a front cross member Gf and a rear cross member Gb extending in the left-right direction of the vehicle body B.

  The front end portions of the left side member Gl and the right side member Gr are coupled to each other via a front cross member Gf, and the rear end portions of the left side member Gl and the right side member Gr are connected to a rear cross member. The outer frame of the head guard G is configured by being coupled to each other via Gb.

  In addition, the ends of the lateral beam Gs extending in the left-right direction of the vehicle body B are coupled to the center of the left side member Gl and the right side member Gr, and the front cross member Gf and the lateral beam Gs And between the transverse beam Gs and the rear cross member Gb, a plurality of longitudinal beams Gp, Gp... Extending in the front-rear direction of the vehicle body B are arranged in parallel along the left-right direction of the vehicle body B. Combined with different layouts.

  Here, the above-described prior art known to the applicant is a publicly known / public technique disclosed by a pamphlet or the like, and is not related to a literature known invention, and therefore there is no prior art literature information to be described.

    By the way, as a head guard for a protection frame in a working vehicle such as a forklift, a metal plate is pressed and formed as a whole, but in such a structure, a derivative model (total length, full width difference) Therefore, it is difficult to respond flexibly because it is necessary to manufacture a new press die.

  On the other hand, the conventional head guard G shown in FIGS. 10 to 12 is formed by joining (welding) various members made of a metal material, so that each member is cut out to a desired size. This makes it possible to flexibly deal with derivative models (series with different lengths and widths).

  On the other hand, in the above-described conventional head guard G, the number of components is large, and there are many joints (welding) places between the components. Since solid materials are used for most of the components such as the longitudinal beams Gp, Gp, etc., the use amount of the metal material increases, leading to an inadvertent increase in the overall weight and an increase in manufacturing cost. There was an inconvenience.

  Further, in the conventional head guard G, as shown in FIGS. 11 and 12, the longitudinal beams Gp, Gp... That are one of the component parts are made of a plate material having a rectangular cross-sectional shape. When the forklift is operated for the first time on the next day after raining, for example, an operator (not shown) seated on the seat S drops when the rainwater has accumulated on the head guard G. There were inconveniences such as getting wet.

  In view of the above situation, an object of the present invention is to provide a work vehicle that can reduce the weight and cost of a head guard in a protect frame and can suppress the occurrence of harmful effects caused by the rainwater collected on the head guard. is there.

    In order to achieve the above object, a work vehicle according to claim 1 is a work vehicle including a protect frame surrounding an operator seated on a seat, and the head guard located above the operator's head in the protect frame A front side cross member that extends in the front-rear direction, a left side member and a right side member, and a left side member and a right side member that extend in the left-right direction of the vehicle body and that form a rain gutter The rear cross member, extending in the front-rear direction of the vehicle body, spanned and fixed to the front cross member and the rear cross member, and has an open upper, substantially concave cross-sectional shape, and is parallel to the left-right direction of the vehicle body And a plurality of longitudinal beams arranged in the vertical direction.

  The working vehicle according to the invention of claim 2 is the working vehicle according to claim 1 of the invention, wherein the width dimension of the first half of the vertical beam is set narrower than the second half, and the first half of the adjacent vertical beams It is characterized in that the gap is made wider than the gap between the latter half portions of adjacent longitudinal beams.

  Furthermore, the working vehicle related to the invention of claim 3 is the working vehicle related to the invention of claim 1, wherein the width dimension of the rear half of the vertical beam is set wider than that of the front half, and The gap is narrower than the gap between the front halves of adjacent longitudinal beams.

    According to the working vehicle relating to the first aspect of the invention, the longitudinal beam constituting the head guard of the protect frame is fixed over the front cross member and the rear cross member, in other words, the front cross member and the rear cross. By making it an integral member that is not divided between the members, the number of parts that make up the head guard can be kept as small as possible, thereby simplifying the work involved in the production of the head guard. It becomes possible.

  In addition, the vertical beam that constitutes the head guard is not a solid material that has been used in the past, but has a generally concave cross-sectional shape that is open upward, so that the amount of metal material that constitutes the head guard can be used. It is possible to reduce the overall weight of the head guard and thus the weight of the work vehicle including the protection frame, and at the same time, it is possible to achieve a reduction in manufacturing cost as much as possible. Become.

  Furthermore, the vertical beam constituting the head guard has a substantially concave cross-sectional shape opened upward, so that the vertical beam effectively functions as a rain gutter that captures rainfall. Since the rainwater trapped by the vertical beam is discharged to the front crossmember and the rear crossmember that make up the gutter, it is possible to collect rainwater on the head guard. Therefore, it is possible to prevent harmful effects caused by rain water falling from the head guard.

  According to the work vehicle relating to the invention of claim 2, the gap between the front halves of the adjacent vertical beams is made wider than the gap between the rear halves of the adjacent vertical beams. The upper field of view is greatly expanded, so that the safety during work is further improved.

  According to the work vehicle related to the invention of claim 3, the gap between the rear half portions of the adjacent vertical beams is made narrower than the gap between the front half portions of the adjacent vertical beams, so that the front from the operator seated on the seat Since the latter half of the vertical beam functions effectively as a rain guard without obstructing the upper field of view, the workability especially in the rain is further improved.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
FIG. 1 and FIG. 2 show an example in which the present invention is applied to a forklift that is one mode of a working vehicle. The forklift 1 includes a vehicle body 2 and a work machine 3 mounted in front of the vehicle body 2. ing.
Incidentally, the direction indicated by the arrow X in each figure is the forward direction of the forklift 1.

  The forklift 1 is a battery-driven forklift (battery forklift), and a seat 5 on which an operator (not shown) sits is installed on the upper part of the bonnet 4 defined in the rear half of the vehicle body 2. Yes.

  Further, the vehicle body 2 is provided with a protect frame 6 that surrounds an operator (not shown) seated on the seat 5, and this protect frame 6 includes a pair of left and right front stays 6f, a roof stay 6t, and a rear stay 6r. And a head guard 10 that covers the overhead of an operator (not shown).

  The head guard 10 is formed by joining (welding) various members made of a metal material to each other as will be described later. As shown in FIGS. 2 to 5, the left side of the head guard 10 extends in the front-rear direction of the vehicle body 2. It has a side member 11L and a right side member 11R, and a front cross member 12F and a rear cross member 12B extending in the left-right direction of the vehicle body 2.

  The left side member 11L and the right side member 11R each have a substantially inverted L-shaped cross-sectional shape and are long structural members that also function as brackets, and a metal plate is bent by a press device or the like. Has been created.

  The front cross member 12F and the rear cross member 12B are long structural members each having an open cross-sectional shape on the upper side and also functioning as a rain gutter. A metal plate is molded by a press device or the like. Has been created by.

  The left and right end portions of the front cross member 12F are joined to the front end portions of the left side member 11L and the right side member 11R by welding, and the left and right end portions of the rear cross member 12B are connected to the left side member. A substantially rectangular outer frame constituting the head guard 10 is configured by joining the rear end portions of 11L and the right side member 11R by welding.

  The head guard 10 includes a plurality of longitudinal beams 13, 13... Extending in the front-rear direction of the vehicle body 2. These longitudinal beams 13, 13... Are formed between a front cross member 12F and a rear cross member 12B. They are arranged in parallel so as to span between them and to maintain a predetermined interval along the left-right direction of the vehicle body 2.

  The vertical beam 13 is a long structural member that also functions as a rain gutter, as will be described later. The vertical beam 13 has an open, substantially concave cross-sectional shape and is formed by molding a metal plate with a press device or the like. An assembly notch 13n opened upward is formed at a substantially central portion in the longitudinal direction.

  Further, the vertical beam 13 is fixed by welding its front end to the front cross member 12F, and its rear end is welded to the rear cross member 12B. The cross member 12B is coupled to each other through a plurality of longitudinal beams 13, 13.

  The head guard 10 is provided with one lateral beam 14 extending in the left-right direction of the vehicle body 2, and the lateral beam 14 is bridged between the left side member 11L and the right side member 11R. And are arranged so as to intersect with the plurality of vertical beams 13, 13.

  The transverse beam 13 is a long structural member made of a pipe material having a square cross-sectional shape, and is fixed by welding its left end to the upper surface of the substantially central portion of the left side member 11L, and to the right The end is welded and fixed to the upper surface of the substantially central portion of the right side member 11R, whereby the left side member 11L and the right side member 11R are coupled to each other via the lateral beam 14. ing.

  Further, the horizontal beam 14 is fitted into each notch 13n of the plurality of vertical beams 13, 13... And is fixed to the individual vertical beams 13 by welding the fitting portions. Are coupled to each other through the transverse beam 14 together with the left side member 11L and the right side member 11R.

  Incidentally, the horizontal beam 14 fitted and welded to the notch 13n of the vertical beam 13 has its upper surface laid out substantially flush with the upper edge of the vertical beam 13, and its lower surface is a vertical beam 13 to be described later. The vertical beam 13 is laid out separately from the bottom of the inner surface so as not to hinder the function of the rain gutter.

  According to the forklift 1 having the head guard 10 having the above-described configuration, the vertical beam 13 constituting the head guard 10 of the protect frame 6 is not a solid material that has been used conventionally, but is opened upward. By using the concave cross-sectional shape, the amount of the metal material constituting the head guard 10 can be reduced as much as possible, so that the total weight of the head guard 10 and the forklift 1 including the protection frame 6 can be reduced. Weight reduction can be achieved, and at the same time, the manufacturing cost can be reduced as much as possible.

  Further, according to the forklift 1 having the above-described configuration, the longitudinal beam 13 constituting the head guard 10 of the protect frame 6 is fixed over the front cross member 12F and the rear cross member 12B, in other words, the front cross By using an integral member that is not divided between the member 12F and the rear cross member 12B, the number of parts constituting the head guard 10 can be reduced as much as possible. It is possible to greatly simplify various operations such as parts management and welding processes related to manufacturing.

  Further, according to the forklift 1 having the above-described configuration, the vertical beam 13 constituting the head guard 10 has a substantially concave cross-sectional shape opened upward, so that the vertical beam 13 captures rainfall from the shape. Effectively functioning as a rain gutter, the vertical beam 13 is bridged over the front cross member 12F and the rear cross member 12R, so that the rainwater captured by the vertical beam 13 is forward cross member 12F constituting the gutter. Further, since it is discharged to the rear cross member 12B, it is possible to suppress the rainwater from collecting on the head guard 10 as much as possible, and thus it is possible to prevent an adverse effect caused by the rainwater falling from the head guard 10. .

  In addition, according to the forklift 1 having the above-described configuration, each member constituting the head guard 10 is made large (longer) in advance and cut into a predetermined size for use. It is possible to respond flexibly to the above-mentioned series.

  Further, in the above-described embodiment, the left side member 11L and the right side member 11R, and the plurality of vertical beams 13, 13,. By changing the position of the notch 13n at the time of manufacturing the vertical beam 13, the reinforcing point in the head guard 10 can be set very easily and freely.

  Here, in the above-described embodiment, the cross-sectional shape of the vertical beam 13 is a substantially concave cross-sectional shape in which the left and right side plates are slightly opened upward as shown in FIG. 6 (b), a U-shaped cross section as shown in FIG. 6 (c), and a V-shaped cross section as shown in FIG. 6 (d). It goes without saying that various cross-sectional shapes such as a shape can be adopted as the vertical beam 13.

  FIGS. 7, 8 and 9 show a modification of the head guard in the protect frame. The head guard 10 ′ has the width dimension (width) Wf of the front half 13f ′ of each vertical beam 13 ′ in the latter half. The portion 13r 'is formed narrower than the width dimension (width) Wr.

  As a result, the opening dimension (gap) Of ′ between the front half portions 13f ′ of the adjacent vertical beams 13 ′ is wider than the opening dimension (gap) Or between the rear half portions 13r ′.

  Here, if the way of viewing is changed to express the configuration of the head guard 10 ', the head guard 10' has a width dimension (width) Wr of the rear half 13r 'of each longitudinal beam 13' and a width of the front half 13f '. It is formed wider than the dimension (width) Wf, so that the opening dimension (gap) Or between the rear half parts 13r 'in the adjacent longitudinal beam 13' is larger than the opening dimension (gap) Of between the front half parts 13f '. Is also narrow.

  The configuration of the head guard 10 ′ is basically the same as the head guard 10 shown in FIGS. 1 to 6 except for the form of the vertical beam 13 ′ as described above. Components having the same function are denoted by the same reference numerals as those in FIGS. 1 to 6 and a detailed description thereof is omitted.

  According to the forklift having the head guard 10 'having the above-described configuration, the opening dimension (gap) Of between the front half portions 13f' of the adjacent vertical beams 13 'is set to be equal to each other of the rear half portions 13r' of the adjacent vertical beams 13 '. By making it wider than the opening dimension (gap) Or, the field of view of the front upper side from the operator seated on the seat is greatly expanded, and thus the safety during work is further improved.

  Further, according to the forklift having the head guard 10 'configured as described above, the opening dimension (gap) Or between the rear half portions 13r' of the adjacent vertical beams 13 'is set to the front half portion 13f of the adjacent vertical beam 13'. Since the opening dimension (gap) Of ′ is narrower than the other, the rear half 13r ′ of the vertical beam 13 ′ effectively functions as a rain guard without obstructing the front-upper view from the operator seated on the seat. For this reason, the workability especially in the rain is further improved.

  Here, in the head guard 10 'described above, the cross-sectional shape of the vertical beam 13' is a substantially concave cross-sectional shape with the left and right side plates facing upward, but the head guard shown in FIGS. It is needless to say that the vertical beam 13 'can be constructed by adopting various cross-sectional shapes such as a roll-over U-shaped cross-sectional shape, a U-shaped cross-sectional shape, and a V-shaped cross-sectional shape as in the case of the ten vertical beams 13.

  In each of the above-described embodiments, the horizontal beam of the head guard is composed of a pipe material having an angular cross section. It is also possible to constitute from a member exhibiting the following, and even with such a construction, effective weight reduction and cost reduction can be achieved.

  Furthermore, the horizontal beam is formed from the member having an open substantially upper cross-sectional shape at the upper side, and the right and left side members to which the horizontal beam is combined have the function of a rain gutter, so that the vertical beam is combined with the above. A function as a rain gutter can be added to the horizontal beam.

  In each of the above-described embodiments, an example in which the present invention is applied to a forklift that is an aspect of a working vehicle has been described. However, if the working vehicle is configured by installing an operator seat on an opening / closing hood of a vehicle body, the forklift Needless to say, the present invention can be applied to various working vehicles other than the above.

The whole side view of the forklift which showed the example of the working vehicle concerning the present invention. The whole top view which shows the head guard of the forklift in FIG. (a) And (b) is the external appearance side view of the head guard shown in FIG. 2, and the III-III sectional view taken on the line in FIG. (a) And (b) is the external appearance front view of the head guard shown in FIG. 2, and the IV-IV sectional view taken on the line in FIG. FIG. 3 is an exploded perspective view of the head guard shown in FIG. 2. (a), (b), (c) and (d) is sectional drawing which shows the modification of the vertical beam in the head guard shown in FIG. The whole top view which shows the modification of a head guard. VIII-VIII sectional view taken on the line in FIG. IX-IX line sectional view in FIG. The whole side view which shows the conventional working vehicle notionally. The whole top view which shows the head guard of the protect frame in the conventional working vehicle. (a) is the sectional view on the aa line in FIG. 11, (b) is the sectional view on the bb line in FIG.

Explanation of symbols

1 ... Forklift (work vehicle),
2 ... the car body,
5 ... Sheet
6 ... Protect frame,
10, 10 '... head guard,
11L, 11L '... Left side member,
11R, 11R '... right side member,
12F, 12F '... front cross member,
12B, 12B '... rear cross member,
13, 13 '... Vertical beam,
13f '... first half,
13r '... latter half,
14, 14 '... Horizontal beam.

Claims (3)

A working vehicle comprising a protective frame surrounding an operator seated on a seat,
A head guard located above the operator's head in the protect frame,
A left side member and a right side member extending in the front-rear direction of the vehicle body,
A front cross member and a rear cross member that extend in the left-right direction of the vehicle body and connect the left side member and the right side member to each other;
It extends in the front-rear direction of the vehicle body, spans and is fixed to the front cross member and the rear cross member, and has an open upper substantially concave cross-sectional shape, and in parallel along the left-right direction of the vehicle body A plurality of arranged longitudinal beams;
A working vehicle comprising:     The width dimension of the first half part in the vertical beam is set narrower than the second half part, and the gap between the first half parts in the adjacent vertical beam is made wider than the gap between the second half parts in the adjacent vertical beam. Item 1. The working vehicle according to Item 1.     The width dimension of the second half of the vertical beam is set wider than that of the first half, and the gap between the second half of adjacent vertical beams is narrower than the gap between the first half of adjacent vertical beams. Item 1. The working vehicle according to Item 1.

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