JPH11336126A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend the life of a rear cover and to facilitate mounting/ demounting work for the rear cover. SOLUTION: A rear cover 27 is held between a cover upper end holder 19 provided on a canopy roof 15 and a cover lower end holder 24 provided over a second column 10 and a third column 13. In this way, the need for screw holes and brackets for mounting the rear cover 27 with bolts is eliminated, the occurrence of cracking around the screw holes and the brackets is prevented even if the rear cover 27 is vibrated when a hydraulic shovel runs or works for drilling and the life of the rear cover 27 is extended.

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 suitably used for excavating earth and sand.

[0002]

2. Description of the Related Art Generally, construction machines such as hydraulic excavators are
A lower traveling structure, an upper revolving structure rotatably mounted on the lower traveling structure, and a working device provided on the upper revolving structure so as to be able to ascend and descend, a front left side of the upper revolving structure is provided. In addition, a driver seat for a worker who operates the hydraulic excavator to sit down is provided.

[0003] Here, in a small-turn hydraulic excavator which is suitably used for excavation work in a narrow work space such as a narrow road or the like, a box-shaped cab accommodating the driver's seat is used instead of a portion above the driver's seat. Many are equipped with a canopy that covers the area.

[0004] The canopy according to the prior art as described above is generally provided with a canopy roof provided at the upper end of a column erected on an upper revolving structure to cover an upper part of a driver's seat, and a rear cover covering a rear part of the driver's seat. And protects the worker seated in the driver's seat from wind and rain, falling rocks, and the like.

[0005] The rear cover used for the above-mentioned canopy is attached via a bracket to a column on which the canopy roof is provided, and a bracket for supporting the rear cover is usually fixed to the column by welding or the like. I have. A screw hole is formed in each of the rear cover and the bracket, and the rear cover is detachably attached to the bracket by inserting bolts into the screw holes of the rear cover and the screw holes of the bracket.

[0006]

However, as described above,
When screw holes are provided in the rear cover to attach the rear cover to the bracket using bolts, cracks etc. occur around the screw holes of the rear cover due to vibration of the rear cover during running of the excavator or excavation work, There is a problem that the rear cover is damaged early.

When the rear cover is attached to the bracket using bolts, the external force acting around each screw hole due to vibration of the rear cover or the like is reduced on average, so that the number of bolts increases. Therefore, there is a problem that not only the number of parts is increased but also a large amount of time is required for the work of attaching and detaching the rear cover.

Further, for example, when the rear cover is removed in order to ensure the air permeability around the driver's seat, only the bracket is fixed to the support post, and the appearance is significantly impaired. There is.

As another prior art, for example, Japanese Utility Model Laid-Open Publication No. 4-30150 discloses a method in which a bracket is fixedly provided on the rear cover side, and the bracket is attached to a column or the like for supporting the canopy roof using bolts. A hydraulic excavator having a configuration in which a rear cover is disposed behind a driver's seat is disclosed.

[0010] However, in the above-mentioned other prior art, when the rear cover is removed, the bracket does not remain on the column and the appearance can be improved, but the rear cover does not move when the excavator is running or excavating. Due to the vibration, a crack or the like is generated around the bracket of the rear cover, and there is a problem that the rear cover is damaged early.

The present invention has been made in view of the above-mentioned problems of the prior art, and can extend the life of the rear cover.
It is another object of the present invention to provide a construction machine capable of easily attaching and detaching a rear cover.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention covers a construction machine main body having a driver's seat, a column erected on the construction machine main body, and a portion above the driver's seat. The present invention is applied to a construction machine having a canopy roof provided on the column in a state and a rear cover covering a rear portion of the driver's seat.

A feature of the structure adopted by the invention of claim 1 is that a cover upper end holding member for holding an upper end of the rear cover is provided on a rear side of the canopy roof, and a lower end of the rear cover is provided on the support post. Is provided, and the rear cover is sandwiched between the cover upper end holder and the cover lower end holder.

With this configuration, for example, the rear cover can be sandwiched between the cover upper end holding member and the cover lower end holding member without providing a screw hole for mounting a bolt, a bracket, or the like on the rear cover. For this reason, for example, compared to a configuration in which the rear cover is provided with a screw hole for mounting a bolt, a bracket, and the like, it is possible to prevent the occurrence of cracks around the screw hole and around the bracket due to vibration during traveling or excavation work, The life of the rear cover can be extended.

According to a second aspect of the present invention, the cover upper end holding member is constituted by an upper elastic body having an engagement groove with which the upper end of the rear cover engages and opened downward. The engagement groove with which the lower end of the rear cover engages is constituted by a lower elastic body that opens upward.

With this configuration, the upper end of the rear cover is engaged with the engagement groove of the upper elastic body,
Simply by engaging the lower end of the rear cover with the engagement groove of the lower elastic body, the rear cover can be sandwiched between the cover upper end holder and the cover lower end holder, and the rear cover can be easily attached. Can be.

Further, according to a third aspect of the present invention, the cover upper end holding member is provided with a concave groove formed in the canopy roof and opened downward, and the upper end of the rear cover engaged with the concave groove is engaged with the concave groove. The mating groove is constituted by an upper elastic body that opens downward.

With this configuration, the upper elastic body can be reinforced by the concave groove of the canopy roof, and the upper end of the rear cover can be securely held. Further, the upper elastic body can be easily attached simply by fitting the upper elastic body into the concave groove of the canopy roof.

According to a fourth aspect of the present invention, the cover upper end holder has a recessed groove fixed to the canopy roof and opened downward, and a rear cover fitted to the recessed groove of the frame body. The upper end is formed by an upper elastic body in which an engagement groove with which the upper end engages is opened downward.

With such a configuration, the upper elastic body can be reinforced by the concave groove of the frame fixed to the canopy roof, and the upper end of the rear cover can be securely held.

Further, in the invention of claim 5, the cover upper end holding member is provided on the canopy roof at a position rearward of the column, and the column is provided with a bracket projecting rearward from the column, and the bracket is provided with the bracket. Is that the cover lower end holding member is provided.

With this configuration, the rear cover can be easily held by the cover upper end holder and the cover lower end holder at the rear position of the column.

The invention according to claim 6 is characterized in that the bracket is provided so as to be attached to and detachable from the column.

With this configuration, the rear cover can be easily attached and detached simply by attaching or detaching the bracket together with the cover lower end holder to or from the column. In addition, since the bracket and the cover lower end holder can be removed from the support together with the rear cover, the appearance of the construction machine with the rear cover removed can be improved.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a construction machine according to the present invention will be described below with reference to FIGS. 1 to 8 by taking a small turning hydraulic excavator as an example.

In the figure, reference numeral 1 denotes crawler tracks 1A, 1 on both left and right sides.
A shows a tracked lower traveling body provided with A
A discharge plate 2 is provided at the front side of the pallet so as to be able to move up and down.

Reference numeral 3 denotes an upper revolving unit as a construction machine main body which is provided on the lower traveling unit 1 so as to be revolvable.
Is provided on the undercarriage 1 so as to be able to turn, and has a turning frame 4 having a floor plate 4A, and a floor plate 4A of the turning frame 4.
A driver's seat 5 provided above, a building cover 6 disposed on the right and rear sides of the driver's seat 5 and accommodating a motor, a hydraulic power source (neither is shown), and the like, It is generally constituted by an arc-shaped counter weight 7 disposed between the revolving frame 4 and the building cover 6. A working device (not shown) is provided at the front center of the upper swing body 3 so as to be able to move up and down.

As shown in FIG. 2, the upper revolving unit 3 is composed of a building cover 6, a counterweight 7, a canopy roof 15, which will be described later, and a rear cover 27, each of which has a turning radius from the turning center O to the rear surface of the counterweight 7. It is configured to fit within R and within a vehicle width W determined by the interval between the crawler tracks 1A provided on the lower traveling body 1.

Reference numeral 8 denotes a first support provided on the right front side of the driver's seat 5.
And is fixed to the floor plate 4A of the revolving frame 4 and extends upward (see FIG. 1).

Reference numeral 9 denotes a support fixed to the revolving frame 4 at the rear side of the driver's seat 5, and the support 9 supports columns 10 and 13, which will be described later, as shown in FIG. Therefore, a support 9A extending in the left-right direction and a plurality of legs 9B, 9 extending from the support 9A and fixed to the revolving frame 4.
B,...

Reference numeral 10 denotes a second rear wheel disposed on the right rear side of the driver's seat 5.
The lower end of the second support 10 has a driver seat 5.
And is fixed on the support 9A of the support base 9 at the right rear side and extends upward. The first column 8 and the second column 10 are connected by a reinforcing frame 11 extending in the front-rear direction, and the frame 11 has a portion between the driver's seat 5 and the working device. (See FIG. 1).

The reference numeral 13 designates a third wheel disposed on the left rear side of the driver's seat 5.
The lower end of the third support 13 is located on the left rear side of the driver's seat 5 and is fixed on the support 9A of the support 9 and faces the second support 10 in the left-right direction. And extends upward. A handrail 14 that is gripped when the operator gets on and off the driver's seat 5 is fixed to the lower end of the third support 13. The third support 13 supports the canopy roof 15 together with the first support 8 and the second support 10 described above.

Here, FIG. 1 shows a state in which the second column 10 and the third column 13 overlap (a state in which the second column 10 is hidden), and FIG. 3 shows the first column 8. And the second support 10 overlaps (the first support 8
Is hidden).

Reference numeral 15 denotes a canopy roof which covers the upper part of the driver's seat 5 and is attached to the upper ends of the columns 8, 10, and 13. The canopy roof 15 has an upper surface as shown in FIGS. Part 15A, lower part 15B, front part 15
C, rear surface portion 15D, left side surface portion 15E, and right side surface portion 15
It has F and is formed as a lightweight hollow body by blow molding a resin material, for example. As shown in FIG. 5, a bulging portion 16 bulging downward along the outer peripheral edges of the rear surface portion 15D and the left side surface portion 15E is continuously formed on the lower surface portion 15B of the canopy roof 15. Also, a transparent plate 1 is provided on the upper surface 15A of the canopy roof 15.
7 and a lattice-shaped cover 18 for protecting the transparent plate 17 from falling rocks or the like (see FIG. 2).

Reference numeral 19 denotes a cover upper end holder provided on the rear side of the canopy roof 15 for holding the upper end 27A of the rear cover 27. The cover upper end holder 19 is provided with a concave groove described later provided on the canopy roof 15. 20 and an upper rubber 21 fitted into the concave groove 20.

Numeral 20 denotes a concave groove provided on the bulging portion 16 located on the lower surface side of the canopy roof 15.
Numeral 0 is formed as a groove having a U-shaped cross section which is open downward and is formed by recessing the bulging portion 16 toward the upper surface portion 15A.

21 is fitted in the concave groove 20, and the concave groove 2
An upper rubber as an upper elastic body extending along 0,
As shown in FIG. 5, the upper rubber 21 has a fitting convex portion 21A fitted into the concave groove 20 and an engaging groove branched bifurcated from the fitting convex portion 21A and opening downward. 21B. Then, by inserting the upper end 27A of the rear cover 27 into the engagement groove 21B of the upper rubber 21,
The upper end 27A of the rear cover 27 is elastically supported by the upper rubber 21. At this time, the upper rubber 21 is reinforced by the concave groove 20 of the canopy roof 15.

Numerals 22 and 22 denote brackets provided on the second column 10 and the third column 13, respectively. Each of the brackets 22, as shown in FIGS.
The bolts 23, 23,... Are attached and detachably fixed near the lower ends of the bolts 0, 13 and protrude rearward.

Reference numeral 24 is provided on the second support 10 and the third support 13 via each bracket 22, and a rear cover 27 is provided.
3A and 3B, the cover lower end holder 24 is fixed to the protruding end side of each bracket 22 by welding or the like, and is directed upward. Open U-shaped concave groove 25A
And a lower rubber 26 to be described later fitted into the concave groove 25A of the frame 25.

Reference numeral 26 denotes a lower rubber as a lower elastic body fitted in the concave groove 25A of the frame 25.
Is an engagement groove 2 opened upward as shown in FIG.
6A. Then, the engagement groove 2 of the lower rubber 26 is formed.
6A, the lower end 27B of the rear cover 27 is inserted into the lower rubber 2.
6, the lower rubber 26 is reinforced by the concave groove 25A of the frame 25 at this time.

Reference numeral 27 denotes a rear cover that covers the rear portion of the driver's seat 5. The rear cover 27 is formed of a rear surface portion 15D and a left side surface portion 15E and a right side surface portion 15F of the canopy roof 15.
It has a curved shape corresponding to the outer peripheral edge portion which is continuous to the side, and is formed as a transparent plate made of, for example, a resin material.

Here, as shown in FIG.
7 is bent from the outer peripheral edge of the canopy roof 15 toward the concave groove 20, and the upper end 27A of the rear cover 27 is formed.
Are the engagement grooves 2 of the upper rubber 21 fitted in the concave grooves 20.
1B. The lower end 27B of the rear cover 27 is inserted into an engagement groove 26A of the lower rubber 26 fitted in the concave groove 25A of the frame 25. Thus, the rear cover 27 is sandwiched between the cover upper end holder 19 and the cover lower end holder 24.

The hydraulic excavator according to the present embodiment has the above-described configuration, and the operation of attaching and detaching the rear cover 27 will be described below.

First, when attaching the rear cover 27, the upper end 27A of the rear cover 27 is inserted into the engaging groove 21B of the upper rubber 21 fitted into the concave groove 20 of the canopy roof 15, and the frame 25 is inserted. The lower end 27B of the rear cover 27 is inserted into the engagement groove 26A of the lower rubber 26 fitted into the concave groove 25A.

In this state, each of the brackets 22 fixed to the frame 25 is fixed to the second column 10 and the third column 13 with two bolts 23, respectively. 27A can be held by the upper rubber 21 and the lower end 27B can be held by the lower rubber 26. Thus, by holding the rear cover 27 between the cover upper end holder 19 and the cover lower end holder 24, the rear cover 27 can be easily placed in the driver's seat 5.
Can be mounted in the rear position.

On the other hand, when removing the rear cover 27,
First, by removing each bracket 22 from the second support 10 and the third support 13, the lower end 2 of the rear cover 27 is removed.
The cover lower end holder 24 is detached from 7B. And
Pull the rear cover 27 downward to remove the canopy roof 15
By detaching the upper end 27A of the rear cover 27 from the upper rubber 21 fitted in the concave groove 20, the rear cover 27 can be easily removed.

In this case, the second support 10 and the third support 1
3 are provided with the cover lower end holder 2.
4. Since the bracket 22 is detached from the columns 10 and 13 together with the rear cover 27, the bracket 22 does not remain on the columns 10 and 13 with the rear cover 27 removed. Thereby, as shown in FIG. 7, the external appearance of the hydraulic shovel with the rear cover 27 removed can be improved.

Thus, according to the present embodiment, between the cover upper end holder 19 provided on the canopy roof 15 and the cover lower end holder 24 provided on the second column 10 and the third column 13. Since the rear cover 27 is configured to be sandwiched, it is not necessary to provide, for example, screw holes for mounting bolts, brackets and the like as in the related art, and even if the rear cover 27 vibrates during traveling of the hydraulic excavator or excavation work, Cracks and the like can be prevented from being generated around the screw holes and around the bracket, and the life of the rear cover 27 can be extended.

Further, by simply attaching and detaching the bracket 22 to and from the second support 10 and the third support 13 with the bolts 23, the work of attaching and detaching the rear cover 27 together with the cover lower end holder 24 can be easily performed. . Moreover,
The number of bolts 23 required for mounting the rear cover 27 is 4
The number of components can be reduced, and the number of parts can be reduced.

Further, when the rear cover 27 is removed, the brackets 22 provided on the second support column 10 and the third support column 13 are removed from the support columns 10 and 13 together with the cover lower end holder 24 and the rear cover 27. , Rear cover 2
The external appearance of the excavator with the 7 removed can be improved.

Next, FIG. 8 shows a modification of the present invention. In this modification, the same components as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 8, reference numeral 31 denotes a canopy roof according to the present modification, and the canopy roof 31 has an upper surface 3 similar to the canopy roof 15 according to the above-described embodiment.
1A, a lower surface 31B, etc., but is different in that the lower surface 31B is formed as a flat surface.

Reference numeral 32 denotes a cover upper end holder provided on the rear side of the canopy roof 31.
Reference numeral 2 denotes a frame 33 fixed to the lower surface 31B of the canopy roof 31 with bolts or the like and having a concave groove 33A opened downward, and an upper rubber 21 fitted into the concave groove 33A of the frame 33. It is composed of

In this modification, the upper end 27A of the rear cover 27 is inserted into the engaging groove 21B of the upper rubber 21 fitted in the concave groove 33A of the frame 33, The lower end 27B of the rear cover 27 is
The rear cover 27 is inserted into the engagement groove 26A of the lower rubber 26 fitted into the concave groove 25A of the frame 25.
Between the cover upper end holder 32 and the cover lower end holder 24.

In the above-described embodiment, the upper rubber 21 forming the cover upper end holder 19 is reinforced by fitting it into the concave groove 20 provided in the canopy roof 15, thereby forming the cover lower end holder 24. Lower rubber 26
Is reinforced by fitting it into the concave groove 25A of the frame 25, but the present invention is not limited to this. For example, the upper rubber and the lower rubber may be reinforced with a core metal or the like. Accordingly, the cover upper end holder may be configured only with the upper rubber, and the cover lower end holder may be configured only with the lower rubber.

In the above-described embodiment, the small turning hydraulic excavator has been described as an example. However, the present invention is not limited to this.
It can be widely applied to a hydraulic excavator having a canopy roof and a rear cover.

[0057]

As described above in detail, according to the first aspect of the present invention, a cover upper end holder for holding the upper end of the rear cover is provided at the rear side of the canopy roof. A cover lower-end holder that holds the lower end of the rear cover is provided, and the rear cover is sandwiched between the cover upper-end holder and the cover lower-end holder. Therefore, even if the rear cover vibrates during traveling or excavation work, it is possible to prevent the occurrence of cracks around the screw holes and the bracket, and to extend the life of the rear cover.

According to the second aspect of the present invention, the cover upper end holding member is constituted by an upper elastic body having an engagement groove with which the upper end of the rear cover engages and opened downward. Since the lower end of the rear cover is formed of a lower elastic body in which an engagement groove engaged with the lower end of the rear cover is opened upward, the upper end of the rear cover is engaged with the engagement groove of the upper elastic body, and the lower end of the rear cover is The rear cover can be sandwiched between the cover upper end holder and the cover lower end holder by simply engaging the portion with the engagement groove of the lower elastic body, and the work of attaching the rear cover can be easily performed. In addition, the transmission of vibration during traveling or excavation work to the rear cover can be suppressed by the upper elastic body and the lower elastic body.

According to the third aspect of the present invention, the cover upper end holding member is formed in a concave groove formed in the canopy roof and opened downward, and the upper end portion of the rear cover fitted in the concave groove is engaged. Since the engaging groove formed by the upper elastic body is opened downward, the upper elastic body can be reinforced by the concave groove of the canopy roof, and the upper end of the rear cover can be securely held.

According to the fourth aspect of the present invention, the cover upper end holder is fixed to the canopy roof and has a concave groove opened downward, and is fitted into the concave groove of the frame. Since the engagement groove with which the upper end of the rear cover engages is constituted by the upper elastic body which opens downward, the upper elastic body can be reinforced by the concave groove of the frame fixed to the canopy roof, and the rear cover can be reinforced. Can be securely held.

According to the fifth aspect of the present invention, the cover upper end holder is provided on the canopy roof at a position rearward of the support, and the support is provided with a bracket protruding rearward from the support. Since the cover lower end holder is provided on the projecting end side, the rear cover can be easily held between the cover upper end holder and the cover lower end holder at the rear position of the column.

According to the sixth aspect of the present invention, since the bracket is attached to the column and detachably provided, the bracket is attached to the column while the upper end of the rear cover is held by the cover upper end holder. Thereby, the rear cover can be easily sandwiched between the cover upper end holder and the cover lower end holder. On the other hand, the rear cover can be easily removed by removing the bracket from the column and detaching the upper end of the rear cover from the cover upper end holder. In this case, since the bracket is removed from the column together with the cover lower end holder and the rear cover, the appearance of the construction machine with the rear cover removed can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a hydraulic shovel according to an embodiment of the present invention with a working device removed.

FIG. 2 is a plan view of FIG. 1 showing a hydraulic excavator.

FIG. 3 is a right side view of FIG. 1 showing a hydraulic excavator.

FIG. 4 is a perspective view showing a support base, a support, a cover lower end holder, and the like.

FIG. 5 is an enlarged view of arrow V in FIG. 3 showing the canopy roof, rear cover, cover upper end holder, cover lower end holder, and the like.
It is the longitudinal cross-sectional view seen from the -V direction.

FIG. 6 is an enlarged cross-sectional view showing the rear cover, the cover lower end holder, and the like, as viewed from the direction indicated by arrows VI-VI in FIG.

FIG. 7 is a right side view similar to FIG. 3, showing a state in which a rear cover has been removed from the hydraulic excavator.

FIG. 8 is a longitudinal sectional view similar to FIG. 5, showing a modification of the cover upper end holder.

[Explanation of symbols]

 Reference Signs List 3 upper revolving superstructure (construction machine main body) 5 driver's seat 8,10,13 support column 15,31 canopy roof 19,32 cover upper end holder 20 recessed groove 21 upper rubber (upper elastic body) 21B engagement groove 22 bracket 24 cover lower end Holder 25 Frame 25A Depressed groove 26 Lower rubber (lower elastic body) 26A Engagement groove 27 Rear cover 27A Upper end 27B Lower end

Claims (6)

[Claims] 1. A construction machine main body having a driver's seat, a column erected on the construction machine main body, a canopy roof provided on the column so as to cover above the driver's seat, A rear cover for covering a rear position, a cover lower end holding means for holding an upper end of the rear cover on a rear side of the canopy roof, and a lower end of a cover for holding a lower end of the rear cover on the support post. A construction machine, wherein a holding tool is provided, and the rear cover is sandwiched between the cover upper holding tool and the cover lower holding tool. 2. The cover upper end holder is formed of an upper elastic body having an engagement groove with which an upper end of the rear cover engages and opened downward. The cover lower end holder is a lower end of the rear cover. The construction machine according to claim 1, wherein the engagement groove with which the portion engages is formed by a lower elastic body that opens upward. 3. The cover upper-end holder has a concave groove formed in the canopy roof and opening downward, and an engaging groove fitted into the concave groove and engaged with an upper end of the rear cover. The construction machine according to claim 1, wherein the construction machine comprises an upper elastic body that is open toward the side. 4. The cover upper-end holder includes a frame having a concave groove fixed to the canopy roof and opening downward, and an upper end of the rear cover fitted into the concave groove of the frame. The construction machine according to claim 1, wherein the mating engagement groove is formed by an upper elastic body that opens downward. 5. The cover upper end holder is provided on the canopy roof at a position rearward of the support, and the support is provided with a bracket projecting rearward from the support, and the bracket is provided with the cover. The construction machine according to claim 1, wherein the lower end holder is provided. 6. The construction machine according to claim 5, wherein the bracket is provided so as to be attached to and detachable from the column.