JPH07292723A - Reinforced construction of guard cover made of resin - Google Patents

Abstract

PURPOSE:To improve the appearance of a guard cover and use it as a step for getting on and off by forming reinforcing members along the inner face of the guard cover made of resin, and fitting them to the guard cover with metal fittings for locking. CONSTITUTION:A cover 11 is formed extending over front and rear of one side part of an upper turning body so as to cover extending from the front face side to the upper face side and the side part, and the cover 11 is formed capably of being rotationally movably opened/closed in the front up/down directions. Reinforcing members 12, 16 are formed along the inner face part extending over the front face part to the upper face part of the guard cover 11 made of resin, and locking holes are provided on a plurality of positions of the reinforcing members 12, 16. In addition, projecting parts 18-20, 18'--20' being buried with locking members corresponding to the locking holes are formed on the inner face part of the guard cover 11. Hence the reinforcing members 12, 16 are fitted to the guard cover 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a resin guard cover mounted on construction machines such as hydraulic excavators and industrial vehicles.

[0002]

2. Description of the Related Art FIG. 4 is a side view of the essential parts of a hydraulic excavator body according to the prior art. FIG. 5 is a plan view of an essential part of the guard cover viewed from A of FIG. FIG. 6 is a BB line of FIG.
It is a sectional view. As shown in FIGS. 4 to 6, a cab 2 is provided on the left front part of the upper revolving structure 1, an engine compartment 3 and a counterweight 4 are provided on the rear part thereof, and a guard cover 5 is provided on the right front part thereof. The guard cover 5 is integrally molded from resin so as to cover the side surface from the front surface side, and the reinforcing ribs 6, 7, 8, 9 are integrally formed on the inner surface portion extending from the front surface portion to the upper surface portion. Molded. Further, a horizontal surface for steps is provided on the central outer surface portion from the front surface portion to the upper surface portion.

[0003]

When using a hydraulic excavator, there are many opportunities to climb up to the upper surface of the upper revolving superstructure for maintenance of the engine, hydraulic equipment and the like. At this time, the passengers get on and off from the upper surface of the lower traveling body via the steps of the guard cover and the upper surface. Moreover, since a tool or a replacement part is carried, the guard cover is weighted accordingly. Therefore, in order to reinforce the cover, ribs are integrally formed on the inner surface of the cover, but in the process, distortion occurs due to the variation in the wall thickness of the cover part and the rib part, which impairs the appearance and reduces the commercial value. I will end up. The present invention aims to solve the above problems.

[0004]

In order to achieve the above-mentioned object, in the reinforcing structure of the resin guard cover of the present invention, the reinforcement is so arranged as to extend along the inner surface portion extending from the front surface portion to the upper surface portion of the guard cover. A projecting portion in which a member is formed, locking holes are opened at a plurality of positions of the reinforcing member, and the locking member is embedded in the inner surface of the guard cover so as to correspond to the locking hole. Was formed, and the reinforcing member was attached to the guard cover by a metal fitting for locking.

Thin plate members, which are substantially perpendicular to the bar-shaped member bent along the inner surface and are parallel to the guard cover, are fixed to both ends and the center of the bar-shaped member to form the reinforcing member. .

The thin plate member bent along the inner surface is provided with a mounting hole corresponding to the locking member embedded in the protrusion.

[0007]

In the reinforcing structure of the resin guard cover constructed as described above, the reinforcing member is arranged on the inner surface portion of the guard cover, and the front portion, the step portion and the top portion of the guard cover are arranged. In the above, the reinforcing member is locked. Therefore,
When a person climbs onto the step portion, the load acts on the front surface and the upper surface of the guard cover through the reinforcing member in a distributed manner to prevent stress concentration. In addition, the reinforcing ribs of the guard cover itself are not required, distortion during molding is eliminated, the appearance is good, and the productivity is improved.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a partially cutaway plan view of a resin guard cover according to claims 1 and 2 of the present invention. FIG. 2 is a side sectional view taken along the line CC of FIG. As shown in FIGS. 1 and 2, the front surface portion 21 and the upper surface portion 2 of the guard cover 11
A plurality of protrusions 18, 18 ', 19, 19', 20, 20 'are provided on the inner surface of the step portion 23 and the step portion 23, respectively, and the protrusions 18, 18', 19, 19 ', 20, Two
A locking member 25 is embedded in each 0 '. Further, a bracket 14, a plate 15 and an angle 16 are installed on the plurality of bent pipes 13 and 13 ', respectively, and locking holes corresponding to the locking members 25 are opened.
It is attached via a bolt 24. Also, the step unit 23
An inverted U-shaped plate 17 is inserted between the inner surface of the pipe 13 and the pipe 13 and welded to the pipe 13.

FIG. 3 is a perspective view of the reinforcing member 26 according to claims 1 and 3 of the present invention. As shown in this figure, a bent U-shaped plate is formed in the center of the thin plate member 27 in a side view.
The reinforcing member 26 is formed by welding the joint 28, and the mounting hole 29 is formed corresponding to the locking member 25.

[0010]

EFFECTS OF THE INVENTION A resin guard cover is simply a cosmetic cover.
Instead, when it is used as a step, a corresponding strength is required. Therefore, in the conventional guard cover, a reinforcing rib is integrally formed on the inner surface of the guard cover, which causes distortion during the manufacturing process and is unattractive. In the present invention,
Since the reinforcing metal fitting was arranged on the inner surface of the guard cover and fixed to the inner surface, the problem of the distortion was eliminated and the appearance was improved. In addition, the guard cover can be easily molded, and the productivity can be improved. Further, since the guard cover is not distorted, the connection with the adjacent parts is improved and the assembling time can be shortened.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of a resin guard cover according to claims 1 and 2 of the present invention.

FIG. 2 is a side sectional view taken along the line CC of FIG.

FIG. 3 is a perspective view of a reinforcing metal member according to claims 1 and 3 of the present invention.

FIG. 4 is a side view of a main part of a hydraulic excavator according to a conventional technique.

5 is a plan view of the guard cover as viewed from A of FIG. 4. FIG.

6 is a cross-sectional view of a main part seen from BB of FIG.

[Explanation of symbols]

 5,11 Resin guard cover 6,7,8,9 Reinforcing rib 10,23 Step portion 12,26 Reinforcing member 13 Pipe 14 Bracket 15,17,28 Plate 16 Angle 18,19,20 Projecting portion 25 Locking member

Claims (3)

[Claims] 1. A cover is formed at a front part on one side of an upper revolving superstructure so as to cover a front surface side to an upper surface side and a side surface side, and the cover is rotated in a front vertical direction. In a resin guard cover that can be opened and closed dynamically, a reinforcing member is formed along the inner surface portion extending from the front surface of the guard cover to the upper surface, and locking holes are formed at a plurality of positions of the reinforcing member. Open and puncture the inner surface of the guard cover.
A resin guard cover, characterized in that a protrusion having a locking member embedded therein is formed corresponding to the locking hole, and the reinforcing member is attached to the guard cover by a locking metal fitting. -Reinforcement structure. 2. A reinforcing member is provided by fixing thin plate members, which are substantially perpendicular to the rod-shaped member bent along the inner surface portion and parallel to the guard cover, to both end portions and the central portion of the rod-shaped member. The resin-made gas generator according to claim 1, characterized in that
Reinforced structure of the cover. 3. The thin plate member bent along the inner surface portion is provided with a mounting hole corresponding to the locking member embedded in the protrusion. Reinforced structure of resin guard cover.