JPH11229440A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the appearance of a construction machine by preventing play of an opening/closing cover and also preventing deformation of the cover. SOLUTION: An attractive mechanism 18 is equipped near the upper side of an opening/closing cover 12 separated from a lock mechanism 16 to attract a magnet 20 of the attraction mechanism 18 to an attraction piece 21 of the container box 10 side when the cover 12 is opened/closed. In this way, the position near the upper part of the front end side of the cover can be attracted to the container box 10 side when the cover is opened/closed. Hence, play of the opening/closing cover can be prevented. Since the cover is fixed to the container box 10 owing to the magnetic force of the magnet 20, the cover can be closed with a weak force and deformation of the cover can be prevented and the appearance can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction machine such as a hydraulic shovel and a hydraulic crane, and more particularly to a construction machine having a building cover provided with an opening / closing cover.

[0002]

2. Description of the Related Art In general, a construction machine such as a hydraulic excavator or a hydraulic crane includes a frame, a building cover provided on the frame and having a maintenance opening, and a base for opening and closing the opening of the building cover. An opening / closing cover whose end side is rotatably attached to the building cover, and a lock mechanism provided at the tip end side of the opening / closing cover and locking an opening of the building cover with the opening / closing cover closed. I have. An operator's cab is provided on the front left side of the frame, and a counterweight is attached to the rear end.
Further, in the building cover, a motor, a hydraulic pump,
A multiple valve device or the like is housed, and the multiple valve device is a lower traveling body,
It is constituted by a control valve for controlling an actuator provided in the working device.

[0003] Since the construction machine generates vibrations during running and working, the vibration may cause the opening / closing cover to rattle. In particular, the vibration may occur at a position away from the lock mechanism at the tip end of the opening / closing cover. Tends to occur. For this reason, a rubber member is provided between the building cover and the opening / closing cover to prevent rattling of the opening / closing cover. As this rubber member, for example, the rubber member is provided when the opening / closing cover is closed. A rubber projection that elastically contacts the opening / closing cover is used, and the rubber projection is pressed to a position away from the lock mechanism on the distal end side of the opening / closing cover, so that the elastic force prevents vibration of the opening / closing cover.

[0004] On the other hand, there is a hydraulic excavator in which a turning radius at a rear end falls within a longitudinal dimension of a lower traveling body (hereinafter, referred to as a small turning hydraulic excavator). In this small-turn hydraulic excavator, the space for accommodating the prime mover, the multiple valve device, and the like is reduced by the amount by which the counterweight is moved to the front side, so the building cover is extended to the front right side to provide a storage box. I have. The storage box houses a multiple valve device which is the most important device. In addition, check the multiple valve device in the storage box,
An opening for maintenance is provided, and an opening / closing cover for opening and closing the opening is attached.

However, in the case of the small turning hydraulic excavator, the corner may be hit at the time of the turning operation. Therefore, the opening / closing cover attached to the storage box provided on the front right side is chamfered at the corner. Also, since this storage box and opening / closing cover obstruct the right view from the cab,
It is formed to be inclined downward toward the front. Thereby, the opening / closing cover is formed as a deformed cover that is convexly curved from the base end side toward the front end side.

[0006] Such a modified cover is rotatably attached to the storage box by two hinges provided at the base end side and separated from each other upward and downward, and a lock mechanism is provided at the distal end side. Further, the lock mechanism is provided near the lower side of the opening / closing cover at a position avoiding a complicated curved shape, within a range that can be reached by a worker on the ground.

[0007] A rubber member such as a rubber projection is also provided between the oddly-shaped opening / closing cover and the storage box configured as described above, similarly to the above-mentioned building cover and opening / closing cover.

[0008]

In the above-mentioned conventional hydraulic excavator, a rubber projection is provided between the building cover (storage box) and the opening / closing cover to prevent the opening / closing cover from rattling. . However, in order to prevent the opening / closing cover from rattling with the rubber projection, it is necessary to press the opening / closing cover against the rubber projection.

For this reason, when closing the door, it is necessary to deform the rubber projection by pressing the cover in order to lock the locking mechanism to the building cover.
There is a problem that a large force is required to close the opening / closing cover.

In addition, since the elastic force of the rubber projection acts on the cover, the cover may be deformed.
In this case, there is a problem that a step is generated between the opening / closing cover and the building cover, and the aesthetic appearance is impaired.

Further, since the rubber material loses its elasticity over time, there is a problem in that the rubber material does not perform the rattling preventing function when used for a long period of time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. It is an object of the present invention to prevent rattling of an opening / closing cover and to prevent deformation of the opening / closing cover to improve the appearance. It is an object of the present invention to provide a construction machine which can be used.

[0013]

SUMMARY OF THE INVENTION A construction machine according to the present invention comprises a frame, a building cover provided on the frame and having a maintenance opening, and a base end for opening and closing the opening of the building cover. An opening / closing cover rotatably attached to the building cover, provided on a tip side of the opening / closing cover,
A lock mechanism for locking the opening of the building cover with the door closed by the open / close cover.

Then, in order to solve the above-mentioned problem,
A feature of the configuration adopted by the invention of claim 1 is that, between the opening / closing cover and the building cover, a position away from the lock mechanism at a tip end side of the opening / closing cover when the opening / closing cover is closed. That is, the suction means is provided on the side.

With this configuration, when the opening / closing cover is closed, the suction means sucks a position away from the lock mechanism at the tip end side of the opening / closing cover toward the building cover, so that the opening / closing cover is not deformed. The door can be closed with a light force, and rattling of the open / close cover can be prevented.

According to a second aspect of the present invention, the adsorbing means is constituted by a magnet provided on one of the building cover and the open / close cover, and a magnetic member provided on the other and adsorbed by the magnet.

Thus, by providing the magnet on one of the building cover and the open / close cover and providing the magnetic member on the other, the suction means can be easily configured. In addition, by using the magnet, the attraction force can be continued for a long time.

A third aspect of the present invention is that the magnetic member of the attracting means is provided so as to be capable of adjusting a position of attracting the magnet to the magnet. Thereby, the gap between the opening / closing cover and the building cover when the opening / closing cover is closed can be easily adjusted.

According to a fourth aspect of the present invention, the opening / closing cover is formed as a modified cover convexly curved from the base end to the distal end, and the lock mechanism and the suction means are provided at two different positions in the height direction of the modified cover. That is, they are arranged.

With such a configuration, for example, a lock mechanism and a suction means can be provided on a deformed cover provided on the front right side of a small-swing hydraulic excavator.
Further, the opening / closing cover can be fixed by the lock mechanism and the suction means arranged at two different positions in the height direction, and the rattling due to the vibration can be prevented.

According to a fifth aspect of the present invention, the opening and closing cover is formed of a resin material. Thereby, the opening / closing cover made of resin which is easily deformed can be prevented from rattling without being deformed.

[0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a construction machine according to an embodiment of the present invention.

1 to 4 show a first embodiment of the present invention, wherein 1 is a lower traveling body, 2 is an upper revolving body mounted on the lower traveling body 1 so as to be able to pivot, The upper revolving unit 2 includes a revolving frame 3, a driver's cab 4 provided on the front left side of the revolving frame 3, a counterweight 5 attached to a rear end of the revolving frame 3, and a building cover described later. 7 and the like, and a working device 6 for excavating earth and sand is provided on the front side of the upper swing body 2.

Here, in the hydraulic shovel according to the present embodiment, the turning radius of the rear portion of the counterweight 5 is lower than that of the undercarriage 1.
It is configured as a small-swing hydraulic excavator that fits within the front-rear dimension.

Reference numeral 7 denotes a building cover provided on the revolving frame 3. The building cover 7 is located between the cab 4 and the counterweight 5, and includes a motor, a hydraulic pump (neither is shown), or the like. Engine cover 8 and fuel tank 9 housed
And a storage box 10 provided on the front right side of the revolving frame 3.

Here, the storage box 10 is shown in FIGS.
As shown in the figure, the front part 10A, the rear part 10B, and the right side part 1
0C, a left side surface (not shown), and an upper surface 10D form a closed box shape. In addition, between front surface 10A and upper surface 10D, front surface 10D is located forward from upper surface 10D.
A is a curved surface portion 10E whose height gradually decreases toward A, and an opening 10 of the storage box 10 is provided on the right side surface portion 10C.
F is provided. A reinforcing frame 11 is attached to the right side surface 10C along the opening 10F. Cover supporting frames 11A, 11A extending rightward along the front surface of the fuel tank 9 are separated from the reinforcing frame 11 upward and downward. It is provided.

The storage box 10 houses therein the most important equipment, such as the undercarriage 1, and a multiple valve device (not shown) including a control valve for controlling an actuator of the working device 6, and the like. doing.

Reference numeral 12 denotes an opening / closing cover provided on the opening 10F side (right side) of the storage box 10.
Are the cover support frames 11A, 1 of the reinforcing frame 11.
1A is constituted by a rotating frame 14 which forms a rectangular frame and which is rotatably mounted via hinges 13, 13, and a resin cover 15 which is mounted on the rotating frame 14.

Here, the resin cover 15 is attached to the front part 15.
A, a side portion 15B and an upper surface portion 15C.
A, the side surface portion 15B, and the upper surface portion 15C are connected by curved surfaces, respectively, and are formed as a deformed cover that is convexly curved from the base end side toward the front end side as a whole.

Reference numeral 16 denotes a lock mechanism provided on the distal end side of the opening / closing cover 12, and the lock mechanism 16 is located at a position closer to the lower side where a complicated curved shape is avoided within a range that can be reached by a worker on the ground. It is arranged. And the lock mechanism 16
The hook 16A, which is manually rotated, is inserted into the storage box 10.
The opening / closing cover 12 is held in a closed state by engaging with an engagement piece 17 provided on the reinforcing frame 11 on the side.

Reference numeral 18 denotes a storage box 10 and an opening / closing cover 12
The suction mechanism 18 is provided between the opening and closing cover 12 and the lock mechanism 1.
6 and is disposed closer to the upper side. As shown in FIG. 4, the suction mechanism 18 is attached to the rotating frame 14 and extends to the vicinity of the storage box 10 when the opening / closing cover 12 is closed, and a screw is attached to the tip of the mounting base 19. It is composed of a disc-shaped magnet 20 that is stopped, and a suction piece 21 as a magnetic member provided on the reinforcing frame 11 on the storage box 10 side. The magnet 20 is provided in a protective case (not shown) formed in a shallow cylindrical shape by a nonmagnetic material, for example.

Further, the suction piece 21 is screwed to the reinforcing frame 11 via the elongated hole 21A, whereby the position of suction with the magnet 20 can be adjusted, and the position of the opening / closing cover 12 with respect to the storage box 10 can be adjusted. It can be done easily.

The hydraulic excavator according to the present embodiment has the above-described configuration. Next, an operation method for opening and closing the openable cover 12 with respect to the storage box 10 will be described.

First, the operation when the cover 12 is opened in the closed state will be described. In this case, FIG.
The hook 16A of the lock mechanism 16 provided on the open / close cover 12 in the closed state shown in FIG. 4 is manually operated to release the engagement between the hook 16A and the engaging piece 17. Then, by pulling the distal end side of the opening and closing cover 12 in the direction of arrow A against the attraction force of the magnet 20 with the hand on the locking mechanism 16, the opening and closing cover 12 is opened as shown in FIG. can do. Further, when the opening / closing cover 12 is opened, the magnet 20 is separated from the attraction piece 21 so as to be peeled off, so that the door can be opened with a lighter force than the attraction force.

Next, a description will be given of the operation of closing the openable cover 12 in the open state. In this case, the user places his hand on the vicinity of the lock mechanism 16 and moves the openable cover 12 in the direction indicated by the arrow B.
By lightly pressing in the direction, the hook 16A of the lock mechanism 16 can be engaged with the engagement piece 17, and the opening / closing cover 12 can be closed.

When the opening / closing cover 12 is closed, the magnet 20 of the suction mechanism 18 is attracted to the suction piece 21 of the storage box 10. Can be fixed to the storage box 10 side.

As described above, according to the present embodiment, the attraction mechanism 18 is provided at a position closer to the upper side of the opening / closing cover 12 distant from the locking mechanism 16, and the magnet 20 of the attraction mechanism 18 is stored when the opening / closing cover 12 is closed. Since it is configured to be adsorbed by the adsorption piece 21 provided on the box 10 side,
A position closer to the upper side on the front end side of the opening / closing cover 12 can be fixed by suction to the storage box 10 side. Thereby, the tip end side of the opening / closing cover 12 can be fixed at the two places of the lower locking mechanism 16 and the upper suction mechanism 18, so that even when vibration occurs during the operation of the hydraulic shovel or during the traveling, It is possible to prevent the opening / closing cover 12 from rattling due to the vibration, and to prevent noise generation, wear and damage of the hinge 13 and the lock mechanism 16 and the like, and improve reliability.

Moreover, since the opening / closing cover 12 is fixed to the storage box 10 by utilizing the magnetic force of the magnet 20, it is not necessary to strongly press the opening / closing cover as in the case of the rubber projection of the prior art. The locking mechanism 16 can be locked by simply pressing the lock 12. Thereby, the deformation of the opening / closing cover 12 (the resin cover 15) can be prevented, and the appearance can be improved. Further, since the magnetic force of the magnet 20 does not change over time, the effect of preventing the opening / closing cover 12 from rattling can be continued for a long period of time.

Further, since the suction piece 21 of the suction mechanism 18 is attached to the reinforcing frame 11 on the storage box 10 side through the long hole 21A so as to be position-adjustable, the resin cover 15 and the resin cover 15 when the cover 12 is closed are closed. The gap with the storage box 10 can be easily adjusted, and assembling workability can be improved.

Next, FIG. 5 shows a second embodiment of the present invention. The feature of the present embodiment lies in that a suction means is provided at two places with a lock mechanism interposed therebetween. In addition,
In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

31 is a building cover, 32 is the building cover 3
An opening 32 </ b> A is formed on the right side of the motor cover 32 in the motor cover 1. In addition, vertical frames 33, 33 are erected from the front and rear of the opening 32 </ b> A, and a horizontal frame 34 is bridged over the vertical frames 33.

Reference numeral 35 denotes an opening 32A of the motor cover 32.
The opening / closing cover according to the present embodiment provided on the (right) side, the opening / closing cover 35 is formed in a plate shape from a metal material or a resin material, and the upper side thereof has a curved surface corresponding to the curved shape of the fuel tank 9 or the like. No. Opening / closing cover 3
5 has hinges 36,
It is mounted rotatably via 36.

Reference numeral 37 denotes a lock mechanism provided on the distal end side of the opening / closing cover 35.
It is attached to the upper and lower middle part of Then, the lock mechanism 37 holds the opening / closing cover 35 in the closed state by engaging the hook 37 </ b> A, which is manually rotated, with the engagement piece 38 provided on the other vertical frame 33 on the motor cover 32 side. Is what you do.

Reference numerals 39, 39 denote two suction mechanisms as suction means provided between the vertical frame 33 on the motor cover 32 side and the opening / closing cover 35. The suction mechanisms 39, 39 are
The lock mechanism 16 is sandwiched on the tip side of the opening / closing cover 35 and
Each is provided at a position separated downward. Also,
Each of the suction mechanisms 39 includes a disc-shaped magnet 40 attached to the opening / closing cover 35 and a suction piece 41 as a magnetic member provided on the other vertical frame 33.

Thus, in the present embodiment configured as described above, substantially the same operation and effect as those in the first embodiment can be obtained. In particular, in the present embodiment, the lock mechanism 37 is provided. The suction mechanisms 39, 39 are provided at positions separated upward and downward with the opening and closing cover 3 in between.
5 can be more reliably prevented from rattling.

The first embodiment exemplifies a case in which the suction piece 21 is provided on the reinforcing frame 11 on the storage box 10 side and the magnet 20 is provided on the rotating frame 14 on the opening / closing cover 12 side. In the embodiment, the case where the suction piece 41 is provided on the vertical frame 33 on the motor cover 32 side and the magnet 40 is provided on the opening / closing cover 35 is exemplified.
The present invention is not limited to this, and the mounting relationship between the suction pieces 21 and 41 and the magnets 20 and 40 may be reversed.

The reinforcing frame 11, the vertical frame 33
Is formed of a magnetic member,
A configuration may be adopted in which the magnets 20 and 40 are directly attracted to the reinforcing frame 11 and the vertical frame 33 by omitting the magnets 1 and 41. When the open / close covers 12 and 35 are made of a magnetic material and the magnets 20 and 40 are provided on the reinforcing frame 11 and the vertical frame 33 side, the open / close covers 12 and 35 are provided.
Alternatively, the magnets 20 and 40 may be directly attracted.

Further, in each of the embodiments, the case where the suction mechanisms 18, 39 are provided on the opening and closing covers 12, 35, which open and close by rotating the front end horizontally, is used instead. The suction mechanism may be provided on an opening and closing cover that opens and closes by turning upward and downward.

On the other hand, in each of the embodiments, a small turning hydraulic excavator has been described as an example of a construction machine. However, the present invention is not limited to this. For example, general hydraulic excavators, hydraulic cranes, bulldozers, etc. It can be widely applied to various construction machines.

[0050]

As described above in detail, according to the first aspect of the present invention, the position between the opening / closing cover and the building cover at a position away from the lock mechanism at the tip side of the opening / closing cover when the opening / closing cover is closed. Is provided on the building cover side, so that when the opening / closing cover is closed,
The position of the front end of the opening / closing cover away from the lock mechanism is adsorbed to the building cover by the suction means, so that it is possible to prevent generation of noise due to rattling of the opening / closing cover, damage to the lock mechanism, and the like. In addition, since the opening / closing cover is fixed to the building cover by suction using suction means, the opening / closing cover can be easily closed with a light force. Can be

According to the second aspect of the present invention, the attraction means is constituted by the magnet provided on one of the building cover and the open / close cover and the magnetic member provided on the other and to which the magnet is attached. By providing the magnet on one of the building cover and the opening / closing cover and providing the magnetic member on the other, the attracting means can be easily configured, and the productivity can be improved. Further, by using the magnet, the attraction force can be continued, and the play of the opening / closing cover can be prevented for a long time.

According to the third aspect of the present invention, since the magnetic member of the attracting means is provided so as to adjust the position of attracting the magnet, the gap between the openable cover and the building cover when the openable cover is closed can be reduced. Adjustment can be easily performed, and assembling workability can be improved.

According to the fourth aspect of the present invention, the opening / closing cover is formed as a deformed cover that is convexly curved from the base end toward the front end, and the lock mechanism and the suction means are different in the height direction of the deformed cover. Since it is configured to be disposed at a location, for example, a lock mechanism and a suction means can be provided on a deformed cover provided on the front right side surface of a small turning hydraulic excavator. Further, since the opening and closing cover can be fixed by the lock mechanism and the suction means arranged at two different positions in the height direction, it is possible to more reliably prevent the opening and closing cover from rattling.

According to the fifth aspect of the present invention, since the opening / closing cover is formed of a resin material, it is possible to prevent rattling by the suction means without deforming the easily deformable resin opening / closing cover. An aesthetic appearance can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a hydraulic excavator according to a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view showing a storage box, an opening / closing cover, and the like.

FIG. 3 is a perspective view showing a state where an opening / closing cover is opened, as viewed from the same position as in FIG. 2;

FIG. 4 is an enlarged view of a main part of a partially broken part showing the suction mechanism in a state where the magnet is attracted to the attracting piece.

FIG. 5 is an enlarged perspective view showing a motor cover, an opening / closing cover, and the like according to a second embodiment of the present invention.

[Explanation of symbols]

 3 Revolving frame 7, 31 Building cover 10 Storage box 10F, 32A Opening 12, 35 Opening / closing cover 15 Resin cover 16, 37 Lock mechanism 18, 39 Suction mechanism (suction means) 20, 40 Magnet 21, 41 Suction piece (magnetic Parts) 32 Motor cover

Claims (5)

[Claims] 1. A frame, a building cover provided on the frame and having a maintenance opening, and a base end side rotatably attached to the building cover for opening and closing the opening of the building cover. A construction machine comprising: an opening / closing cover; and a lock mechanism provided on a tip side of the opening / closing cover and locking the opening of the building cover with the opening / closing cover closed. The construction machine further comprises suction means for sucking a position away from the lock mechanism on the tip end side of the opening / closing cover to the building cover side when the opening / closing cover is closed. 2. The construction according to claim 1, wherein the suction means is constituted by a magnet provided on one of the building cover and the open / close cover, and a magnetic member provided on the other and which is attracted by the magnet. machine. 3. The construction machine according to claim 2, wherein the magnetic member of the attraction means is provided so as to adjust a position of attraction with the magnet. 4. A structure in which the opening / closing cover is formed as a modified cover convexly curved from the base end side to the distal end side, and the locking mechanism and the suction means are disposed at two different positions in the height direction of the modified cover. The construction machine according to claim 1, 2 or 3, wherein: 5. The construction machine according to claim 1, wherein said opening / closing cover is formed of a resin material.