JP2002206364A - Opening/closing cover device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening/closing cover device capable of automatically and reliably keeping a cover at an opened position by merely opening the cover provided at an opening section, easily releasing the opened state when closing the cover, and preventing a means keeping the cover at the opened position from becoming an obstacle at the opening section. SOLUTION: This opening/closing cover device is provided with the cover 24 fitted openably and closably, a guide member 28 provided on the cover and having a guide face T and a coupling groove formed on the guide face, and a locking means having a locking member 30 releasably coupled with the coupling groove and an exciting means 32 exciting the locking member toward the guide face and the coupling groove.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an opening / closing cover device,
More particularly, the present invention relates to an opening / closing cover device having a means for releasably holding a cover which can be freely opened and closed at an open position.

[0002]

2. Description of the Related Art A typical construction machine, for example, a hydraulic shovel, a wheel loader, or the like, has a rotation axis for inspection and maintenance of the equipment on a side surface of a body containing equipment such as an engine. It has a cover that can be freely opened and closed. Work such as inspection and maintenance is performed with this cover opened. Therefore, if the cover is not firmly held in the open position at the time of the work, the cover will move due to the wind, the inclination of the body, or the touch, which will hinder the work. For this purpose, as means for holding the cover in the open position, a stay, which is a support bar extending between the cover and the body, is provided.

[0003] This stay will be described with reference to FIGS. 7 and 8. The cover 52 attached to the opening of the body 50 of the construction machine so as to be openable and closable about the rotation axis S is opened and closed between an open position indicated by a solid line and a closed position indicated by a two-dot chain line. Then, the stay 54 is inserted by the operator between the body frame 50 a and the cover 52 at the open position of the cover 52. The stay 54 is formed to have a predetermined length by bending both ends of a round bar into an L-shape, and has one end 54.
a is rotatably held in a mounting hole 50b provided in the body frame 50a. And the other end 5 of the stay 54
The cover 52 is held in the open position by inserting the cover 4b into a drop hole 52a provided in the cover 52. When the cover 52 is closed, the trap 52
, The end 54b of the stay 54 is pulled out, and the stay 54 is rotated about the end 54a as shown by an arrow Y, and
4b is a stay storage hole 5 provided in the body frame 50a.
0c, and the stay 54 is stored as shown by a two-dot chain line in FIG.

[0004]

The conventional opening / closing cover device of the above-described type has the following problems to be solved.

(1) Operation of the stay is troublesome: To open the cover 52 and hold it in that position, the operator opens the cover 52 with one hand, holds the cover 52 in the open position, and holds the stay 54 with the other hand. Of the cover 52 from the stay storage hole 50c of the body frame 50a.
Then, adjust the open position of the cover 52, align the hole position, and insert it. Therefore, operation with both hands is required.
Hole matching for inserting the stay 54 into the drop hole 52a is also troublesome. When closing the cover 52, the stay 54
It is necessary to remove the end 54b of the cover 52 from the drop hole 52a of the cover 52, insert the end 54b into the stay storage hole 50c of the machine body frame 50a, and store it. In the state where the cover 52 is opened, the stay 54 is not attached to the cover 52,
If the attachment is forgotten, the opened cover 52 moves, which hinders operations such as inspection and maintenance of the body 50.

(2) Stay is in the way: When the cover 52 is opened, the stay 54
0a. Therefore, the cover 5
The stay 54 interferes with the operation such as inspection and maintenance of the equipment in the body 50 with the 2 opened.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a technical problem thereof is that the cover is automatically and reliably held at the open position simply by opening the cover provided in the opening, and the cover is closed. When closed, the held state can be easily released, and the means for holding the cover in the open position is not obstructed at the opening,
An object of the present invention is to provide an opening / closing cover device.

[0008]

According to the first aspect of the present invention, a cover which can be opened and closed, a guide surface and an engaging groove formed in the guide surface are provided integrally with the cover. A guide member, a locking member releasably engaged with the engagement groove, and a locking means provided with an urging means for urging the locking member toward the guide surface and the engagement groove. An opening / closing cover device, wherein the locking member and the locking groove are engaged at a predetermined open position of the cover, and the cover is held at the open position.

When the cover is opened to the open position, the engagement groove provided on the cover and the locking member engage, and the cover is automatically and reliably held at the open position. The holding state of the cover can be released by removing the locking member from the locking groove against the urging force of the urging means.

According to a second aspect of the present invention, in the opening and closing cover device according to the first aspect, the locking means releases the engagement with the engagement groove against the urging force of the urging means. It has a release operation means.

Then, the holding state of the cover can be easily released by the release operation means.

According to a third aspect of the present invention, in the opening and closing cover device according to the second aspect, the release operation means includes an operation lever provided integrally with the locking member.

The locking member can be directly released by the operation lever.

According to a fourth aspect of the present invention, in the opening and closing cover device according to the third aspect, the locking means is disposed in a frame member forming an opening closed by the cover, and The operating portion of the lever is positioned at the opening through the frame member.

By disposing the locking means in the frame member, the opening means is not obstructed.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a hydraulic excavator according to a preferred embodiment of the present invention; FIG. .

Referring to FIG.
A hydraulic excavator indicated by the symbol 下部 has a lower traveling body 4 and an upper revolving body 6 supported on the lower traveling body 4 so as to be pivotable in the horizontal direction.
And A driver's cab 8, a work implement 1 provided in front of the driver's cab 8 (left side in FIG. 1) on the upper revolving superstructure 6.
0 and an engine compartment 12 provided behind the cab 8. In the engine room 12, devices such as an engine, a fuel tank, a hydraulic pump, a hydraulic oil tank, and a hydraulic control valve are mounted.

Referring to FIG. 2 together with FIG. 1,
A pair of cover devices 14 and 16 are provided on a left side surface (lower surface in FIG. 2) and a pair of cover devices are provided on a right side surface (upper surface in FIG. 2). The devices 18 and 20 are attached to the left and right openings of the engine compartment 12 so as to be openable and closable about a rotation axis S extending in the vertical direction. Each of these cover devices is mounted so as to open and close between a closed position indicated by a solid line and an open position indicated by a two-dot chain line. In the closed position, the position is held by the well-known latch 22 (FIG. 1). Cover devices 14, 16, 18 and 20
Have substantially the same configuration. Therefore, for the details, the cover device 14 will be described with reference to FIGS.

The cover device 14 includes a cover 24 attached to the engine room 12 so as to be openable and closable about the rotation axis S.
A guide member 28 provided on the cover 24 integrally with the cover 24 having a substantially arc-shaped guide surface T centered on the rotation axis S and an engagement groove 26 formed in the guide surface T; A locking member provided in the engine compartment 12 having a locking member 30 which is releasably engaged with the locking member 26 and a biasing means 32 for biasing the locking member 30 toward the guide surface T and the engagement groove 26. Means 34. The locking means 34 has an operation lever 36 which is a releasing operation means for releasing the engagement with the engagement groove 26 against the urging force of the urging means 32.

The cover 24 is formed by integrally welding various steel members to a cover body 24a formed of a steel plate into a rectangular shape. The rotation axis S is defined by the rotation center of the hinge 24b attached to the cover main body 24a. Although not shown, a pair of hinges 24b are mounted above and below in the axial direction of the rotation axis S. Hinge 24b
The other side is attached to a vertical frame 38 which is one of frame members forming an opening of the engine compartment 12 by a suitable means such as a bolt.

The guide member 28 is formed in a fan shape by a steel plate and has a cover body 24 in the axial direction of the rotation axis S.
a, which is integrally welded and attached to the lower end. A guide surface T of the guide member 28 is formed by the fan-shaped arc portion. The guide surface T is formed by an arc having a radius R about the rotation axis S. The engagement groove 26 is provided on the cover 24.
At the open position, that is, at a position opened by 90 ° about the rotation axis S shown in FIG. 3B from the closed position shown in FIG. 3A, the locking member 30 (the locking member 30 will be described in detail later). (Described below), and is formed in a U-shaped concave shape on the guide surface T so as to hold and hold the cover 24 in the rotation direction.

The locking means 34 is mounted inside a horizontal frame 40 having an L-shaped cross section, which is a lower frame forming an opening of the engine compartment 12. The locking member 30
A base 30a formed by bending one end of a round bar into an L-shape and disposed along the direction in which the horizontal frame 40 extends.
And a bent portion 30b whose distal end is detachably engaged with the engaging groove 26 of the guide member 28. The base 30a is
It is slidably mounted in the axial direction by a pair of support blocks 40a and 40b provided on the horizontal frame 40 at intervals. The bent portion 30b is formed so that its tip end is formed in the horizontal frame 40 and protrudes from an elongated hole 40c extending in the extending direction of the horizontal frame 40. Accordingly, the bent portion 30b can move freely along the elongated hole 40c. A pair of support blocks 40a
An operation lever 36 is integrally attached to the base 30a located between the base member 40b and the base portion 30b in a round bar shape. The operation lever 36 is formed such that its distal end protrudes from an elongated hole 40d formed in the horizontal frame 40 in the extending direction. Between the operating lever 36 and one of the support blocks 40a, a compression coil spring 3 as an urging means is provided.
2 is mounted so that the base 30a of the locking member 30 passes therethrough. Therefore, the bent portion 3 of the locking member 30
Ob is urged away from the support blocks 40a and 40b. The bent portion 30b urged by the compression coil spring 32 is positioned so as to contact the bottom of the engagement groove 26 and the end of the elongated hole 40c substantially simultaneously (FIG. 4).

The opening and closing operation of the opening and closing cover device as described above and the operation thereof will be described.

(1) Cover closed: In the closed position of the cover 24 shown in FIG. 3A, the cover 24 is positioned on the same plane as the side surface of the engine room 12 and closes the opening thereof. At this time, the locking member 30 of the locking means 34 does not engage with the engagement groove 26 of the guide member 28 but is in contact with the guide surface T. In this closed position, the cover 24
It is fixed and held in the engine compartment 12 by a latch 22 (FIG. 1).

(2) Opening the cover: When the cover 24 is rotated to a predetermined open position about the rotation axis S by operating the latch 22 (FIG. 1) as shown in FIG. The tip of the bent portion 30b of the stop member 30 engages with the engagement groove 26 of the guide member 28, and the cover 24 is held at the open position. The locking member 30 is urged toward the engagement groove 26, and since the engagement groove 26 is formed in a U-shape,
The engagement state is maintained without coming off from the engagement groove 26.

(3) Closing operation of the opening cover: FIG. 3 (b)
In order to bring the cover 24 in the open position shown in FIG. 3 to the closed position shown in FIG. 3 (a), the operation lever 36 integrally attached to the locking member 30 is pushed by the arrow W against the urging force of the compression coil spring 32. The locking member 30 is released from the engagement groove 26 to release the locking state, and the cover 24 is closed.

(4) Operability of opening and closing the cover:
The opening operation of the cover 24 can be performed with one hand. The closing operation is also performed by operating the operation lever 36 for the closing operation.
By disengaging the engagement groove 26 with the engagement groove 26, the operation can be performed with one hand. Therefore, the operation of opening and closing the cover 24 is easy because the operation of detaching the stay is not required unlike the related art. Also, there is no problem such as forgetting to hang in the conventional stay.

(5) Obstruction of the opening: Since the engaging groove 26 and the locking member 30 for holding the cover 24 at the open position are provided near the center of rotation S of the cover 24, the cover 24 is opened. It does not disturb the work such as inspection and maintenance at the position.

(6) Suitable for construction machinery: The opening / closing cover device of the present invention is easy to open and close the cover, and the cover is securely held at the open position. The operation is easy, and the cover is not closed by wind, sloping ground or the like. Therefore, the present invention is suitable for a construction machine having many opportunities to work in a place where the operating environment is poor.

As described above, the present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments. It can be changed or modified.

(1) Cover application place: In the embodiment of the present invention, the openable and closable cover device is applied to the cover provided on the side of the body, but the cover is applied to the side of the body. However, the present invention is not limited to this, and may be an appropriate place such as the upper surface, the front surface, or the rear surface of the body.

(2) Guide member engaging groove: In the embodiment of the present invention, the cover 24 is
Although the engagement groove 26 is provided so as to be held at a position opened by 0 °, the opening position can be set to any position other than 90 ° by changing the position of the engagement groove 26. Also,
Although one engagement groove 26 is formed, a plurality of engagement grooves 26 may be provided to set the open position of the cover 24 at a plurality of positions.

(3) Guide surface: In the embodiment of the present invention, the guide surface T of the guide member 28 is formed in an arc shape having a radius R centered on the rotation axis S. The operation feeling (operating force) can be changed depending on the degree of opening and closing of the door by gradually changing the operation.

(4) Release operation means: In the embodiment of the present invention, the operation lever 36 is provided integrally with the locking member 30 as the release operation means. May be connected to operate the locking member 30 against the urging force.

[0035]

According to the opening / closing cover device constructed in accordance with the present invention, the cover is automatically and reliably held at the open position simply by opening the cover provided at the opening, and is held when the cover is closed. The opening / closing cover device is provided, wherein the opened state can be easily released and the means for holding the cover in the open position is not obstructed at the opening.

[Brief description of the drawings]

FIG. 1 is a side view of a hydraulic excavator as a construction machine having an opening / closing cover device configured according to the present invention.

FIG. 2 is a partially enlarged plan view seen in the direction of arrow A in FIG. 1;

FIGS. 3A and 3B are enlarged detailed views of a portion B in FIG. 2, wherein FIG. 3A shows a cover in a closed position, and FIG.

FIG. 4 is a sectional view taken along line CC of FIG. 3 (b).

FIG. 5 is a perspective view of part B of FIG. 2 as viewed from above in the direction of arrow D of FIG. 2;

FIG. 6 is a diagram showing a stay that holds an open position of the cover when the conventional cover device is viewed in the axial direction of the rotation axis.

FIG. 7 is a sectional view as seen in the direction of arrows EE in FIG. 6;

[Explanation of symbols]

 2: hydraulic excavator (construction machine) 12: engine room (body) 14: cover device 16: cover device 18: cover device 20: cover device 24: cover 26: engagement groove 28: guide member 30: locking member 32: Compression coil spring (biasing means) 34: locking means 36: operation lever (release operation means) 40: horizontal frame (frame member) 42: guide member 52: cover 54: stay S: rotation axis T: guide surface

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihiro Uchihama 7-1-1-14 Wadamiya-dori, Hyogo-ku, Kobe-shi, Hyogo F-term (reference) in Seiryo Engineering Co., Ltd. 2D015 CA00

Claims (4)

[Claims] An openable cover, a guide member having a guide surface and an engagement groove formed in the guide surface, and a guide member provided integrally with the cover, and releasably engaged with the engagement groove. A locking member provided with a biasing means for biasing the locking member toward the guide surface and the engagement groove, wherein the locking is performed at a predetermined open position of the cover. The member and the locking groove are engaged, and the cover is held at the open position.
An opening / closing cover device characterized by the above-mentioned. 2. The opening / closing cover according to claim 1, wherein the locking means includes a releasing operation means for releasing the engagement with the engagement groove against the urging force of the urging means. apparatus. 3. The open / close cover device according to claim 2, wherein said release operation means includes an operation lever integrally provided with said locking member. 4. The locking means is disposed in a frame member forming an opening closed by the cover, and an operation portion of the operation lever is positioned in the opening through the frame member. The opening / closing cover device according to claim 3.