JP4370424B2 - Canopy of turning work vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a turning work machine equipped with a work machine such as a backhoe, and more particularly to a canopy structure in a small turning work vehicle.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a turning work vehicle equipped with a work machine such as a backhoe, particularly a small turning work vehicle, a canopy is provided above a seat and a driving operation unit. The canopy is integrally formed by a canopy roof that covers the upper part of the seat and the driving operation unit, and a support column that supports the canopy roof. Attached to the car, this canopy was light and structurally simple. Such a technique is, for example, a technique of real fairness 7-20203. This canopy was configured in an L shape in side view, and the roof was fixed to a roof support frame erected from the machine. This roof was made of synthetic resin, part of it was made transparent, and a drainage groove for allowing rainwater to flow to the back was provided at the top.
[0003]
[Problems to be solved by the invention]
However, since the roof is composed of a single plate in the above technique, the strength is insufficient, and it is necessary to reinforce the reinforcing plate by interposing it between the roof support frame, which increases the number of parts and the number of assembly steps. Was. Moreover, since the drainage groove was configured to drain backward from the top of the substantially central part in the front and rear, the rainwater that fell forward from the central part fell forward and sometimes hit the operator. In addition, the rear roof support frame is provided in the vertical direction on the left and right, and the rear of the roof is located between them, but the head of the operator may collide with the rear of the roof when suddenly starting or stopping suddenly due to a large impact. there were.
[0004]
[Means for Solving the Problems]
The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.
[0005]
In Claim 1, the working machine (7) was provided in the front part of the turning body (2) comprised so that turning was possible, and the member which supports a canopy (8) was installed upright on the rear part of this turning body (2). In the turning work vehicle, the member that supports the canopy (8) is constituted by two struts (8b, 8b) standing on the left and right, and an upper middle part between the two struts (8b, 8b). The plate (40) made of a plate material is horizontally connected between the columns (8b, 8b), and the two columns (8b, 8b) are spaced apart from each other above the plate (40). The canopy roof (8a) of the canopy (8) is configured to have a front height and a low height, and the canopy is mounted on the rear surface of the plate (40) horizontally placed between the columns (8b, 8b). A roof (8a) is fixed .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0007]
1 is an overall side view showing a turning work vehicle having a canopy of the present invention, FIG. 2 is a plan view showing a turning body, FIG. 3 is a rear view showing a canopy and a canopy support member, and FIG. 5 is a plan view showing the upper surface of the canopy roof.
[0008]
FIG. 6 is a front sectional view of a canopy roof in which a foaming agent is injected, and FIG. 7 is a perspective view showing a first embodiment of a headrest mounting structure.
[0009]
FIG. 8 is a side sectional view, FIG. 9 is a perspective view showing a second embodiment of the headrest mounting structure, and FIG. 10 is a partial front sectional view showing the second embodiment of the headrest mounting structure.
[0010]
11 is a cross-sectional view of the canopy support member taken along lines AA and BB in FIG. 4, FIG. 12 is a cross-sectional view of the canopy support member taken along line CC in FIG. 4, and FIG. FIG.
[0011]
First, the structure of the turning work vehicle which has the working machine structure of this invention is demonstrated. In FIG. 1, a turning work vehicle supports a turning body 2 at the upper center of a crawler type traveling device 1 so as to be able to turn left and right. Arranged freely. A bonnet 14 that covers the engine or the like is disposed above the revolving body 2, and a seat 16 is attached above the bonnet 14. A driving operation unit 15 is provided in front of the seat 16, and a canopy 8 is disposed above the driving operation unit 15 and the seat 16. A counterweight 17 is attached to the rear end portion of the revolving structure 2, and a canopy support member 18 is erected on the counterweight 17. The canopy 8 includes a canopy roof 8a and a support column 8b, and the support member 18 is detachably attached to the support column 18 so that the canopy 8 is attached to the revolving structure 2.
[0012]
Further, a boom bracket 12 is attached to the center of the front end of the revolving body 2 so as to be able to turn left and right, and the bottom end of the boom 6 is supported on the boom bracket 12 so as to be turnable up and down. The boom 6 is formed in a substantially “<” shape having a bent portion 6 d in the middle in a side view, and an arm 5 is rotatably supported on the upper end portion of the boom 6. A bucket 4 as a work attachment is rotatably supported on the part. The boom 7, the arm 5, the bucket 4, and the like constitute a work machine 7.
[0013]
The boom 6 is rotated by the boom cylinder 11, the arm 5 is rotated by the arm cylinder 10, and the bucket 4 is rotated by the bucket cylinder 9. The boom cylinder 11, arm cylinder 10, and bucket cylinder 9 are configured as hydraulic cylinders, and each cylinder 9, 10, 11 supplies pressure oil from a hydraulic pump disposed in the bonnet 4 of the swivel base 2 through a hydraulic hose. By doing so, it is driven to extend and contract.
[0014]
Further, the boom cylinder 11 is interposed between the cylinder support portion 12b of the boom bracket 12 and the boom cylinder bracket 36 provided on the middle front surface of the boom 6, and the arm cylinder 10 is provided on the middle rear surface of the boom 6. An arm cylinder bottom bracket 31 is interposed between the bucket cylinder bracket 30 provided at the base end portion of the arm 5, and the bucket cylinder 9 is interposed between the bucket cylinder bracket 30 and the bucket bracket 29 connected to the bucket 4. Has been.
[0015]
Next, the configuration of the canopy 8 and the canopy support member 18 and the support structure of the canopy 8 will be described. As shown in FIGS. 2 to 4, the canopy support member 18 includes two support columns 18a and 18a and a support bracket 18b. The support struts 18a and 18a are erected on the upper surface of the counterweight 17 with a certain interval in the left-right direction, and are bent inward from the middle so that the interval between the support struts 18a and 18a becomes smaller. A support bracket 18b is fixed to the upper ends of the support columns 18a and 18a so as to connect them.
[0016]
The structure of the support | pillar of this canopy support member 18 is demonstrated. The support struts 18a and 18a of the canopy support member 18 are formed by cylindrical pipes, and the lower part from the middle part is located on the rear side of the bonnet 14. If the distance between the side surface of the bonnet 14 and the support column 18a is increased, the bonnet 14 protrudes from the crawler when it protrudes from the counterweight 17 and turns the upper part of the body. Therefore, the interval is shortened as much as possible, but when the bonnet 14 is rotated forward and opened, an object may be caught between them.
[0017]
Therefore, in the present invention, the gap between the side surface of the bonnet 14 and the support column 18a is increased while preventing the turning radius from increasing. That is, the upper and lower portions of the support column 18a shown in FIG. 4 are circular like the AA cross section and the BB cross section shown in FIG. The cross section of the substantially central portion where the side surface of the bonnet 14 and the support column 18a are close to each other has a "<" shape that is an ellipse that is crushed by applying force from one side in the short axis direction as shown in the CC plane of FIG. A deformed concave portion 18c is formed, and this concave side is disposed toward the bonnet 14 side. In this way, as shown in FIG. 13, the distance L between the support column 18a and the bonnet 14 can be increased.
[0018]
The canopy 8 includes a canopy roof 8a, two struts 8b and 8b, a plate 40 made of a plate material, and a supported bracket 8c. From the canopy roof 8a, the pillars 8b and 8b extend downward with a certain interval in the left-right direction, and are bent inward from the middle so that the interval decreases as going downward. A supported bracket 8c is fixed to the lower ends of the columns 8b and 8b so as to connect the both. The support columns 8b and 8b are curved such that the plate 40 is horizontally mounted on the upper part and the both are connected and fixed, and above the plate 40, the distance between them is increased. A canopy roof 8a is fixed on the rear surface of the plate 40. The supported bracket 8c of the canopy 8 is detachably supported and fixed to the support bracket 18b of the canopy support member 18.
[0019]
Next, the canopy roof 8a will be described. A rain groove 8d is formed on the upper surface of the canopy roof 8a, and the rain groove 8d is formed in a U-shape with the rear opened in plan view as shown in FIG. The shape is along. Further, as shown in FIGS. 3 and 5, the rear side of the rain groove 8d formed in a U-shape is defined as open ends 8e and 8e.
[0020]
The canopy roof 8a is formed so as to be low in front and back and high in the left and right center. For this reason, the rainwater dropped on the upper surface of the canopy roof 8a moves rearward and laterally, most of the rainwater falls into the rain groove 8d, is guided and falls from the open ends 8e and 8e, and the rest remains as it is. It flows to the rear of the roof 8a. Therefore, in the end, most of the rainwater that falls on the canopy roof 8a falls from the rear end of the canopy roof 8a. Therefore, almost no droplets drop from the front end of the canopy roof 8a, and it does not interfere with the work and is difficult for the operator.
[0021]
Further, the canopy roof 8a is made of a synthetic resin to reduce the weight. In this embodiment, the canopy roof 8a is formed hollow by blow molding or rotational molding to increase the strength. Further, in the present invention, as shown in FIG. 6, a foaming agent 50 such as urethane or styrene is injected into the hollow interior to increase the strength without substantially increasing the weight. Therefore, it is not necessary to interpose a reinforcing plate between the canopy roof 8a and the column 8b as in the conventional case, and the appearance is improved.
[0022]
Next, a first embodiment of the headrest mounting structure will be described. As shown in FIGS. 7 and 8, a plate 40 is laid across and reinforced between the upper and lower middle portions of the support columns 8b and 8b, and mounting bolt holes 40a and 40a are provided in the left and right middle portions of the plate 40, respectively. It is open. On the other hand, nuts (not shown) are inserted and fixed to the insert portion 8f on the front surface of the lower portion of the canopy roof 8a in accordance with the positions of the bolt holes 40a and 40a of the plate 40. On the other hand, a headrest 42 made of an elastic member such as soft foamed polyurethane or rubber is disposed on the front surface of the plate 40. The headrest 42 also has bolt holes 42a aligned with the bolt holes 40a and 40a of the plate 40. 42a is opened, and the bolt holes 42a and 42a are stepped holes having different diameters so that the screw portion of the bolt can penetrate the small diameter portion and the bolt head 41a can enter the large diameter portion.
[0023]
With this configuration, the bolt holes 42a and 42a of the headrest 42 and the bolt holes 40a and 40a of the plate 40 are passed through the bolts 41 and 41, and are fastened together with the nuts of the canopy roof 8a. With the above configuration, the headrest 42 protects the occipital region of the worker when the worker tilts backward.
[0024]
A second embodiment of the headrest mounting structure will be described. As shown in FIGS. 9 and 10, a screw hole constituting a female screw is formed in the plate 40 horizontally mounted on the support columns 8 b and 8 b, and the headrest 44 is attached via the attachment stay 43. The mounting stay 43 bends one elongated metal plate into an Ω shape, and fixes the central flat plate portion 43 a to the plate 40 with bolts 41 and 41. Screw holes or fixing holes are opened in the flat plate portions 43 b on both sides, and the headrest 44 is fixed to the mounting stay 43 by a fixing tool 45.
[0025]
Further, in a turning work vehicle provided with a work machine at a front portion of a turning body configured to be turnable and having a member that supports a canopy on a rear portion of the turning body, two struts are provided upright and left, Since the struts are connected by a plate and the headrest is fixed to the plate, the back of the head hits the headrest even when the operator is tilted backward due to vibration of the main turning work vehicle during work or impact during travel. It is possible to reduce the damage to the worker when touching.
[0026]
Further , in a turning work vehicle having a working machine at a front portion of a turning body configured to be turnable and having a member supporting a canopy installed on a rear portion of the turning body, a canopy roof is formed hollow, Since the foaming agent is injected into the roof, first the strength of the roof is improved, and the metal reinforcement is not required, so the simple design is maintained and the appearance image is improved, so that the operator can contact the metal reinforcement. Thus, the injuries are eliminated, and the roof itself is configured to be lightweight, so that it is not necessary to reinforce the structure of the roof support member. Further, the strength can be increased without changing the mounting structure from the conventional structure.
[0027]
Further , in a turning work vehicle provided with a work machine at the front part of the revolving structure configured to be turnable and having a member supporting the canopy erected on the rear part of the revolving structure, a strut portion that supports the canopy that is close to the bonnet is provided. Since the bonnet side has a concave cross-sectional shape, the radius between the bonnet and the support is increased, the canopy support member is not moved rearward, the turning radius is not increased, and the bonnet and the support Maintain a wide gap so that no objects get caught when opening and closing the bonnet.
[0028]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
In a turning work vehicle comprising a working machine (7) at a front portion of a turning body (2) configured to be turnable, and a member supporting the canopy (8) is erected on a rear portion of the turning body (2), The member that supports the canopy (8) is configured by standing upright two struts (8b, 8b) on the left and right, and is made of a plate material in the upper middle part between the two struts (8b, 8b) The plate (40) is horizontally connected between the columns (8b, 8b), and the two columns (8b, 8b) are curved above the plate (40) so that the distance between them is increased. The canopy roof (8a) of the canopy (8) is configured to have a front height and a low height, and the canopy roof (8a) is fixed to the rear surface of the plate (40) horizontally placed between the columns (8b, 8b). When the canopy receives a load from the lateral direction, the plate has two Load for connecting the pillars are dispersed, leading to improvement in strength. For this reason, the reliability as worker protection improves.
[0029]
Further, since the lower part of the roof of the canopy is fastened and fixed to the plate, it is possible to reinforce each other to increase the rigidity and reduce the number of assembly steps.
[0030]
In addition, the canopy roof is configured to be low in front and back, so that rainwater falls backwards, so that rainwater can be guided and dropped backwards, and rainwater is not applied to the operation system and the worker himself. In addition, since rainwater does not flow forward and side during work, the worker's field of view is maintained widely even in rainy weather.
[Brief description of the drawings]
FIG. 1 is an overall side view showing a turning work vehicle having a canopy according to the present invention.
FIG. 2 is a plan view showing a revolving structure.
FIG. 3 is a rear view showing the canopy and the canopy support member.
FIG. 4 is a side view of the same.
FIG. 5 is a plan view showing the upper surface of the canopy roof.
FIG. 6 is a front sectional view of a canopy roof in which a foaming agent is injected.
FIG. 7 is a perspective view showing a first embodiment of a headrest mounting structure.
FIG. 8 is a side sectional view of the same.
FIG. 9 is a perspective view showing a second embodiment of the headrest mounting structure.
FIG. 10 is a partial front sectional view showing a second embodiment of the headrest mounting structure.
11 is a cross-sectional view of the canopy support member taken along the lines AA and BB in FIG. 4. FIG.
12 is a cross-sectional view taken along the line CC in FIG. 4 of the canopy support member.
FIG. 13 is a partial cross-sectional plan view of the turning work vehicle of the present invention.
[Explanation of symbols]
8 Canopy 8a Canopy roof 8b Post 8d Rain gutter 8e Open end 14 Bonnet 18 Support member 18a Support post 40 Plate 41 Bolt 42 Headrest 43 Mounting stay 44 Headrest 50 Foaming agent

Claims (1)

In a turning work vehicle comprising a working machine (7) at a front portion of a turning body (2) configured to be turnable, and a member supporting the canopy (8) is erected on a rear portion of the turning body (2), The member that supports the canopy (8) is configured by standing upright two struts (8b, 8b) on the left and right, and is made of a plate material in the upper middle part between the two struts (8b, 8b) The plate (40) is horizontally connected between the columns (8b, 8b), and the two columns (8b, 8b) are curved above the plate (40) so that the distance between them is increased. The canopy roof (8a) of the canopy (8) is configured to have a front height and a low height, and the canopy roof (8a) is fixed to the rear surface of the plate (40) horizontally placed between the columns (8b, 8b). A canopy for a swivel work vehicle characterized by the installation .

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