JP2001279718A - Canopy structure for hydraulic shovel and small type hydraulic shovel with its canopy - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a canopy structure for a small type hydraulic shovel to be disassembled simply, to be carried easily and to be assembled simply, and for commonality of parts for plural kinds of shovels. SOLUTION: This canopy structure is composed of multiple supporting posts 9 detouchable against an upper swing body, reinforcing components 17a with access holes, which are bridged between multiple supoorting posts by making the upper edge parts 9c of the supporting posts 9 pass through to the access holes, a roof 12 with penetrating holes 12a to be placed against the access holes, which are supported on the reinforcing components 17a by making the upper edge parts 9c of the supporting posts pass through to the penetrating holes 12a, a sleeve 18, a pushing plate 19 and a bolt 22 for simultaneous fixing and fastening of the reinforceing components 17a and the roof 12, which are kept at the upper edge parts 9c of the supporting posts 9, by driving screws to connect with screwed parts 9d, which are formed at upper edge parts 9c of the supporting posts 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small hydraulic excavator canopy structure having a driver's seat open to the outside and a small hydraulic excavator having the same.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, a small hydraulic excavator called a mini excavator has a crawler type lower traveling body 50 on which an upper revolving body 51 is rotatably mounted. A driver's seat 52 is mounted on a device cover 51 a of the body 51. In front of the driver's seat 52, a boom 53 and an arm 5, which are front attachments, are provided.
4, bucket 55 and boom cylinder 53a, arm cylinder 54a, bucket cylinder 5 for driving them
5a is provided.

A resin roof 56 for protecting the operator from falling objects is provided above the driver's seat 52. The roof 56 is supported by a single support column 57 erected from the equipment cover 51a. ing. For more information,
A mounting bracket 57a is formed at the upper end of the column 57, and an insert nut is embedded on the roof 56 side corresponding to the mounting bracket 57a. The bolt 57 and the roof 56 are fixed by screwing the bolt to the insert nut through the mounting bracket 57a.

[0004] However, in this type of hydraulic excavator, there is a possibility that the strut 57 may be deformed when the excavator falls over. Therefore, it is conceivable to increase the number of columns to four to strengthen the canopy structure. In this way, the columns can be prevented from being deformed, and the driver's seat space can be secured even if the vehicle falls down. In order to increase the rigidity of the four columns, each column is usually connected and fixed by a reinforcing member and integrated.

[0005]

However, if the four pillars are integrated, a plurality of people are required, for example, when moving the site by removing the roof from the pillar portion, and the pillars are integrated. Such a canopy structure has a problem that transportability is poor because of its bulky structure. Furthermore, if the components are made to have dedicated specifications for each model in order to integrate the support, there is a disadvantage that the versatility of the components is lost and the cost of the canopy structure cannot be reduced.

On the other hand, when the support can be disassembled, a fixing structure for fixing the reinforcing member to the support and a fixing structure for fixing the roof to the support need to be doubled, so that the canopy structure is disassembled. , Assembly becomes complicated.

The present invention has been made in consideration of the above-mentioned problems in the conventional canopy structure, and can be easily disassembled and easily transported, and can be easily assembled. An object of the present invention is to provide a canopy structure of a hydraulic shovel capable of sharing parts and a small hydraulic shovel having the same.

[0008]

According to a first aspect of the present invention, there is provided a vehicle having a plurality of columns which are detachable from an upper revolving unit, and which have a mounting hole and the upper end of the column is inserted through the mounting hole. A reinforcing member that is bridged between the columns, a roof that has a through hole provided opposite to the mounting hole, and is held on the reinforcing member by inserting the upper end of the column into the through hole;
By screwing into the screw part formed at the upper end of the support,
A fixing means for simultaneously tightening and fixing the reinforcing member and the roof held at the upper end of the column, and a canopy structure of the hydraulic shovel.

According to a second aspect of the present invention, a holding portion for holding a reinforcing member is provided at an upper end portion of a support, and the fixing means includes a bolt and a reinforcing member mounted on the bolt and held by the holding portion. Hydraulic pressure comprising a reinforcing member pressing portion for pressing the edge of the mounting hole toward the holding portion, and a roof pressing portion for pressing the edge of the through hole of the roof attached to the bolt and held by the reinforcing member toward the reinforcing member. Excavator canopy structure.

[0010] According to a third aspect of the present invention, the reinforcing member holding portion includes:
A canopy structure of a hydraulic shovel comprising a sleeve which can pass through a through hole while being fitted to an upper end portion of a support column and has a lower end abutting on a reinforcing member.

According to a fourth aspect of the present invention, there is provided a canopy structure for a hydraulic shovel, wherein the roof holding portion is constituted by an annular flange plate having a seal portion.

According to a fifth aspect of the present invention, the reinforcing member is formed of a window frame-shaped plate, and a mounting hole is provided at a corner portion of the plate, and the upper end of the supporting column is guided to the mounting hole, whereby the upper end of the supporting column is provided. It is a canopy structure of a hydraulic shovel configured so that the arrangement of the parts can be determined.

According to a sixth aspect of the present invention, there is provided a small-sized hydraulic excavator having a canopy including a plurality of front supports, a plurality of rear supports, and a roof, wherein the front support and the rear support include a roof. The hydraulic excavator is configured to be detachable from the hydraulic excavator main body and to form a substantially rectangular frame when viewed from the side of the hydraulic excavator main body when assembled.

According to a seventh aspect of the present invention, there is provided a small-sized hydraulic excavator according to the sixth aspect, wherein a plurality of types of parts are prepared for at least one of the front support, the rear support, and the roof. The plurality of types of parts include, for example, those in which the spacing of the lower portion of the front column is changed in a plurality of patterns for the front column, and those in which the mounting positions of the front column and the rear column are changed in the plurality of patterns for the roof. It is.

According to the first aspect of the present invention, when the fixing means is screwed to the upper end of the column and fastened, the roof and the reinforcing member and the reinforcing member and the upper end of the column can be simultaneously fixed, respectively. Conversely, if the fixing means is loosened and removed from the upper end of the column, the fixing of the roof and the reinforcing member and the fixing of the reinforcing member and the upper end of the column can be simultaneously released. It can be disassembled into parts and transported. Further, by adopting a structure that can be divided, it is possible to share the support pillar even when the size of the roof is changed, for example, and it is possible to reduce the cost of the canopy structure.

According to the second aspect of the present invention, the reinforcing member pressing portion presses and fixes the edge of the mounting hole of the reinforcing member to the holding portion side, and the roof pressing portion fixes the edge of the through hole of the roof to the reinforcing member side. Press to fix.

According to the third aspect of the present invention, since the reinforcing member is configured to be pressed through the sleeve, the length of the sleeve is adjusted to absorb the deformation of the roof, for example, thereby fixing the roof. be able to.

According to the present invention, when the roof is fixed, the seal is applied.

According to the fifth aspect of the present invention, by disposing the upper end of the support through the mounting hole of the reinforcing member, the arrangement of the upper end of the support is positioned, so that the installation of the roof is simplified.

According to the sixth aspect of the present invention, the canopy can be divided into a front support, a rear support, and a roof.

According to the present invention, since a plurality of types of parts are prepared for at least one of the front support, the rear support, and the roof, the parts can be shared by changing the combination. I can do it.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on one embodiment shown in the drawings.

FIG. 1 shows the configuration of a small hydraulic excavator to which the canopy structure according to the present invention is applied.

In the small hydraulic excavator 1 shown in FIG. 1, an upper revolving unit 3 is rotatably mounted on a crawler type lower traveling unit 2, and a front attachment 4 is provided on a front side of the upper revolving unit 3. ing. The front attachment 4 mainly includes a boom 4a, an arm 4b, a bucket 4c, and a boom cylinder 4a, an arm cylinder 4e, and a bucket cylinder 4f for driving these.

An equipment cover 5 for accommodating an engine unit (not shown), a fuel tank, a hydraulic oil tank, a battery and the like is provided on the rear side of the upper revolving unit 3, and a driver's seat 6 is mounted on the equipment cover 5. ing.

A control box 7 is disposed on the left and right sides of the driver's seat 6.
By operating the upper operation lever 7a, the front attachment 4 can be operated.

Also, four columns 8, 9, 10 and 11 are provided upright on the front and rear sides of the upper swing body 3 so as to surround the driver's seat 6, and a roof is provided at the upper end of these columns 8 to 11. 12 are attached.

FIGS. 2A and 2B show in detail a canopy structure composed of the above-mentioned strut and roof. FIG. 2A is a left side view of the small hydraulic excavator 1 as viewed from the front side, FIG.
(C) is a right side view seen from the rear side.

In FIG. 2 (a), mounting brackets 8b and 9b for detachably fixing to the floor plate 3a are provided at the lower ends 8a and 9a of the front supports 8, 9 formed of metal pipes, respectively. Have been. These mounting brackets 8b and 9b are connected by a strip-shaped connection plate 13.

The upper ends 8c, 9c of the front columns 8, 9 are also provided.
Are also connected by a strip-shaped connection plate 14, so that the front supports 8, 9 are fixed in a rectangular shape by a pair of parallel connection plates 13 and 14.

Reference numeral 9d denotes a front guard extended in a U-shape from the front support 9 to guard the front of the operator. Reference numeral 15 denotes a guard that guards the side of the operator and is used as a handle when getting on and off. Side guard (Fig. 2
(Refer to (b))), all of which are provided as needed.

In FIG. 2C, the rear supports 10 and 1
1 is formed by bending a metal pipe into a U-shape, and a horizontal connecting portion 11a connecting the rear supports 10, 11 is fixed to a fixing metal 5a provided on the upper surface of the device cover 5. On the other hand, it is fixed using bolts 5b. Therefore, if the bolts are loosened and the fixing bracket 5a is disassembled, the rear supports 10, 11 can be removed from the equipment cover 5.

The upper ends 10 of the rear supports 10 and 11 are also provided.
c and 11c are connected by a strip-shaped connecting plate 16, whereby the rear supports 10, 11 are fixed in a rectangular shape as a whole.

A reinforcing frame 17 as a reinforcing member is mounted on the upper end 8c of the front support 8, the upper end 9c of the front support 9, the upper end 10c of the rear support 10, and the upper end 11c of the rear support 11. Has been passed.

FIG. 3 is an enlarged view of the reinforcing frame 17, wherein FIG. 3 (a) is a plan view and FIG. 3 (b) is a front view.

In both figures, the reinforcing frame 17 is composed of a frame plate (plate) 17a punched into a window frame shape and reinforcing ribs 17b fixed on the frame plate 17a along the frame plate 17a. .

The width W _{1 to} W _{4 of the} frame plate 17 a is secured on the upper surface so that the roof 12 can be stably mounted.
Each of the corner portions 17c to 17f has a column upper end 8c,
Mounting holes 17 for inserting 9c, 10c and 11c
g are formed respectively.

The reinforcing rib 17b is composed of four C-shaped steel members arranged on the front side, the rear side and both lateral sides, and a cylindrical portion 17b 'connecting each of the C-shaped steel members at a corner portion. Tube part 1
7b 'is each mounting hole 17g formed in the corner portion.
It is arranged corresponding to.

FIG. 4 is an enlarged view of the canopy roof 12 placed on the reinforcing frame 17, wherein FIG. 4 (a) is a plan view, FIG. 4 (b) is a front view, and FIG. c) shows a right side view.

In FIG. 4, the roof 12 is made of a blow-molded resin member, has a through hole 12a at a position corresponding to the through hole 17g, and has a reinforcing rib 17b on the lower surface.
A concave groove 12b that can be fitted with the groove 12 is formed. In addition, the inclined surface 12c formed on the upper surface of the roof 12 is formed so as to be slightly dug down from both sides, and is formed so as to be lowered downward toward the rear to improve drainage.

FIG. 5 is an enlarged sectional view of a portion A in FIG. 2 and shows an assembly structure of the roof 12 and the front support 9.

In FIG. 5, at the upper end of the front support 9, a support shaft 9f having a female screw portion 9d formed at an upper portion and a large-diameter portion 9e as a holding portion formed at a lower portion is fixed. The connection plate 14 is fixed to the large-diameter portion 9e. Note that the support shaft 9f functions as a support upper end.

When the cylindrical portion 17b 'of the reinforcing frame 17a is fitted to the support shaft 9f, the reinforcing frame 17a is held on the connection plate 14. In this state, a metal sleeve 18 as a reinforcing member pressing portion is fitted to the support shaft 9f,
7b '.

The sleeve 18 is slidable along the support shaft 9f, and a flange portion 18a is formed at a lower portion thereof in a radial direction. The flange portion 18a is for securely pressing the upper end surface of the cylindrical portion 17b '. The diameter of the through hole 12a formed in the roof 12 is set so that the sleeve 18 can pass through.

When the roof 12 is lowered with the through hole 12a of the roof 12 and the support shaft 9f facing each other, the lower surface of the roof 12 comes into contact with the reinforcing frame 17a and is held on the reinforcing frame 17a.

In this state, the upper end of the sleeve 18 slightly protrudes from the periphery of the through hole 12a of the roof 12. Further, the upper end of the sleeve 18 slightly protrudes from the upper end of the support shaft 9f, so that a tightening allowance "t" is secured.

Reference numeral 19 denotes a ring-shaped pressing plate for pressing the peripheral portion of the through hole 12a of the roof 12 toward the reinforcing frame 17a and pressing the sleeve 18 which is in contact with the cylindrical portion 17b 'of the reinforcing frame 17a. It is. However, this holding plate 19
Presses directly against the sleeve 18, whereas a rubber seal 19 as a seal portion against the roof 12.
a. As a result, first, the sleeve 1
After the reinforcing frame 17a is fixed via the support 8 and the rigidity of the support 9 is increased, the roof 12 is fixed by applying a pressing force to the roof 12 by a repulsive force generated by the elastic deformation of the seal 19a. In addition, 20b is a washer, and 21 is a hanging hook.

The holding plate 19 and the seal 19a function as a roof holding portion.

Reference numeral 22 denotes a tightening bolt (bolt), which can fix the above-described components by screwing into a female screw 9d formed on the support shaft 9f. In addition, 23 is a spring washer.

According to the above configuration, when the tightening bolt 22 is screwed into the female screw portion 9d, the pressing plate 19 pushes down the sleeve 18, and the pushed down sleeve 18 presses the cylindrical portion 17b 'to press the reinforcing frame 17a. Is fixed on the connection plate 14.

At the same time as the sleeve 18 is pressed down, the pressing plate 20a presses the peripheral edge of the through hole 12a of the roof 12 via the seal 19a, and the pressed roof 12
Is fixed on the reinforcing frame 17a.

That is, the fixing of the support 9 and the reinforcing frame 17a and the fixing of the reinforcing frame 17a and the roof 12 can be simultaneously realized only by the screwing operation of one fastening bolt 22.

FIG. 6 is an enlarged sectional view of a portion B in FIG. 2 and shows an assembly structure of the roof 12 and the rear support 9. The same components as those in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted.

The roof fixing structure of the rear support 11 is basically the same as that of the front support 9. However, since the hanging hooks 21 shown in FIG. 5 are attached to the four columns in a diagonal arrangement, they are not shown in FIG.

In the roof fixing structure of the rear support 11, the connection plate 16 is disposed between the support shaft 9f and the reinforcing frame 17a.

The plurality of columns in the present invention are four in the above embodiment, but the canopy structure of the present invention can be applied to at least three columns.

In the above embodiment, the fixing means has a configuration in which a female screw is formed at the upper end of the column and a bolt is screwed into the female screw. However, the present invention is not limited to this. A male screw portion may be formed on the outer periphery, and a cap provided with a female screw portion may be screwed to the male screw portion.

Further, the reinforcing member holding portion of the present invention is constituted by the sleeve 18 in the above embodiment, but is not limited thereto.
For example, the cylindrical portion 17b 'of the reinforcing member 17a may be extended and configured to be directly pressed by the holding plate 19.
However, when the sleeve 18 is used, there is an advantage that a processing error and a deformation of the roof can be absorbed only by adjusting the axial length.

[0059]

As is apparent from the above description,
According to the first aspect of the present invention, when the fixing means is screwed into the upper end of the column and fastened, the roof and the reinforcing member and the reinforcing member and the upper end of the column can be simultaneously fixed, and conversely, If the fixing means is loosened and removed from the upper end of the column, the fixing of the roof and the reinforcing member and the fixing of the reinforcing member and the upper end of the column can be simultaneously released, and the roof, the reinforcing member, and the column are disassembled into individual parts. Can be transported. Further, by adopting a structure that can be divided, it is possible to share the support pillar even when the size of the roof is changed, for example, and it is possible to reduce the cost of the canopy structure.

According to the second aspect of the present invention, the reinforcing member pressing portion presses and fixes the mounting hole edge of the reinforcing member to the holding portion side, and the roof pressing portion fixes the roof through hole edge to the reinforcing member side. Therefore, the reinforcing member and the roof can be individually and reliably fixed.

According to the third aspect of the present invention, since the reinforcing member is configured to be pressed via the sleeve, the length of the sleeve is adjusted to absorb the deformation of the roof, for example, thereby fixing the roof. be able to.

According to the fourth aspect of the present invention, since the seal is applied when the roof is fixed, the fixing portion is waterproofed.

According to the fifth aspect of the present invention, since the upper end of the support is inserted into the mounting hole of the reinforcing member, the position of the upper end of the support is positioned, so that the roof can be easily mounted.

According to the sixth aspect of the present invention, the roof can be divided into a front support, a rear support, and a roof.

According to the seventh aspect of the present invention, since a plurality of types of parts are prepared for at least one of the front support, the rear support, and the roof, the parts can be shared by changing the combination. Can be planned.

[Brief description of the drawings]

FIG. 1 is an external view of a hydraulic excavator to which a canopy structure according to the present invention is applied.

2 is an enlarged view of a canopy structure, (a) is a left side view, (b) is a front view, and (c) is a right side view.

3 is an enlarged view of the reinforcing frame shown in FIG. 2, (a) is a plan view, and (b) is a front view.

4 is an enlarged view of the roof shown in FIG. 2, (a) is a plan view, (b) is a front view, and (c) is a right side view.

FIG. 5 is an enlarged sectional view of a roof fixing portion of the front support.

FIG. 6 is an enlarged sectional view of a roof fixing portion of the rear support.

FIG. 7 is a perspective view showing a canopy structure of a conventional hydraulic excavator.

[Description of Signs] 1 Hydraulic excavator 2 Lower traveling structure 3 Upper revolving structure 4 Front attachment 5 Equipment cover 6 Driver's seat 7 Control box 8, 9 Front support 10, 11 Rear support 12 Roof 16 Connection plate 17 Reinforcement frame 18 Sleeve 19 Holding plate 19a Seal 22 Tightening bolt

Claims (7)

[Claims] 1. A plurality of columns which can be attached to and detached from an upper revolving structure, and a reinforcing member which has a mounting hole and is inserted between the plurality of columns by inserting an upper end of the column into the mounting hole. A roof provided on the reinforcing member by having a through hole provided opposite to the mounting hole and having the upper end of the column inserted through the through hole; and a screw formed at the upper end of the column. Fixing means for simultaneously tightening and fixing the reinforcing member and the roof held at the upper end of the column by screwing, and a canopy structure of a hydraulic shovel. 2. A support for holding the reinforcing member at an upper end of the column, wherein the fixing means includes a bolt and an attachment of the reinforcing member mounted on the bolt and held by the holding portion. A reinforcing member pressing portion that presses an edge of the hole toward the holding portion, and a roof pressing portion that presses the through hole edge of the roof attached to the bolt and held by the reinforcing member toward the reinforcing member. The canopy structure for a hydraulic shovel according to claim 1, further comprising: 3. The reinforcing member pressing portion is formed of a sleeve that can pass through the through hole while being fitted to an upper end portion of the pillar, and a lower end of the sleeve contacts the reinforcing member. Hydraulic excavator canopy structure. 4. The canopy structure of a hydraulic shovel according to claim 2, wherein the roof holding portion is formed of an annular flange plate having a seal portion. 5. The reinforcing member is composed of a window frame-shaped plate, the mounting hole is provided at a corner portion of the plate, and the upper end of the support is guided to the mounting hole to form the upper end of the support. The canopy structure of a hydraulic shovel according to any one of claims 1 to 4, wherein the canopy structure is configured to be able to position the arrangement. 6. A small-sized hydraulic excavator equipped with a canopy comprising a plurality of front supports, a plurality of rear supports, and a roof, wherein the front support and the rear support are the roof and the hydraulic excavator. A small-sized hydraulic excavator, which is configured to be detachable from a main body, and is configured to form a substantially rectangular frame when viewed from a side of the hydraulic excavator main body when assembled. 7. The small-sized hydraulic excavator according to claim 6, wherein a plurality of types of parts are prepared for at least one of the front support, the rear support, and the roof.