JPH11158921A - Mounting structure of side door of construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure that facilitates house assembly and side door mounting. SOLUTION: A bracket 1 is placed between a house frame 66 and a side door 59, one pieces of hinges 70, 71 are fixed to the bracket 1, and the other pieces are fixed to the side door 59 and multiple bolt holes are provided in the bracket 1. And the first bolt hole is slightly larger than the diameter of the hole and the other bolt hole is a loose hole or an oblong hole larger than the first one, the first hole of the bracket 1 is fixed to a base seat 65 together with the house frame 66, and the other loose hole is fixed to the house frame 66 with a bolt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a structure for mounting a house cover on a construction machine such as a hydraulic shovel, and more particularly, a structure for mounting a side door.

[0002]

2. Description of the Related Art In construction machines such as hydraulic excavators,
In addition to the cab (or cab), a house for housing equipment such as an engine and a hydraulic pump is provided on a platform of a construction machine. The house is formed by attaching a cover or the like to a skeleton frame, and a part of the cover is configured to be openable or removable for inspection and repair of equipment and supply of fuel and the like. It is desirable that the work for attaching these covers and the like be a simple work in which the position adjustment and the like are simple and the whole is simple. In particular, the mounting of the side door requires smooth opening and closing without any gaps, and various modifications have been made to the mounting structure. Hereinafter, a conventional side door mounting structure will be described.

FIGS. 3 and 4 illustrate a hydraulic excavator as an example in which the present apparatus and a conventional apparatus are used.
FIG. 6 is a diagram illustrating a conventional side door mounting structure (hereinafter, referred to as conventional structure 1). 3 and 4, the upper revolving unit 5 is placed on the lower traveling unit 51 via the revolving unit 50.
2 is rotatably mounted. A platform 53 is provided on the upper swing body 52 as a base. A cab 54 is provided in front of the platform 53, and a house 55 is provided in the rear. Further, a counterweight 57 is attached to the rear end. Cab 5
A working machine 56 is attached to the side next to 4.

[0004] Inside the house 55, equipment such as an engine, a radiator, and a hydraulic pump (not shown) are installed. The covers 58, 59 and 61 are provided as side doors so as to be openable and closable, and the cover 60 is provided so as to be able to open and close with an engine hood. An engine and a radiator are provided below the engine hood 60.

FIGS. 5 and 6 are views showing details of a conventional mounting structure for the side door 59. FIG. The same applies to the side door 58, and the description is omitted. In FIG. 5, a base (or seat) 65 is fixed on a platform 53 by welding for mounting a house frame. The base 65 is provided so that its longitudinal direction is perpendicular to the platform 53. The base 65 is provided with a female screw 80 for fixing the house frame 66 with the mounting bolt 67.

The house frame 66 is a frame of a house formed by bending or welding an angle material or the like, and is fixed to a base. Further, a bolt hole for attaching a cover or a side door is provided at an appropriate position in the house frame. However, since the house frame is a large part and is manufactured by processing an angle or the like, it is difficult to precisely process the distance between the bolt holes. Therefore, the position can be adjusted by opening a fool hole larger than the bolt diameter (for example, a hole having a diameter about 5 to 6 mm larger than the bolt diameter).

[0007] The side door 59 is made of a material such as a steel plate, and has a hinge attached to the back side so as to be freely opened and closed, and is fixed to the house frame. 5 and 6 show the mounting structure of the side door.
In FIG. 5, hinges 70, 71 are provided above and below the side door 59.
(Hereinafter referred to as fixed pieces) 70a, 71a are fixed by welding, and the other pieces (hereinafter, referred to as mounting pieces) 70b, 71b of the hinge are provided with bolt holes for mounting to the house frame. I have.

FIG. 6A shows a hinge 7 using a mounting bolt 72.
It is sectional drawing seen from arrow Y which shows the attachment state of 0. The same applies to the mounting bolts 73 to 75. FIG. 6B is a cross-sectional view taken along arrow X showing a state in which the house frame 66 is fixed to the base 65 by the mounting bolts 67. FIG.
As shown in (A), the bolt hole of the mounting piece 70b of the hinge 70 is provided with a hole slightly larger than the bolt diameter. In the house frame 66, a fool hole 7 of about 1.5 times the bolt diameter is used.
6 and a mounting bolt 7 together with a washer 77.
2 and nut 78. Further, as shown in FIG. 6B, the house frame 66 is provided with a fool hole 79 at a portion to be attached to the base 65, and is fixed to a female screw 80 provided on the base 65 with a mounting bolt 67 together with a washer 81. You.

The conventional structure 1 has the structure described above, and the side door is mounted as follows. First, the house frame 66 is temporarily mounted on the base 65 with the mounting bolts 67, and the mounting pieces 70b of the hinges 70 fixed to the side door 59 are temporarily mounted. Next, the position of the house frame 66 and the position of the side door 59 are adjusted. Finally, the bolts 67 and 72 to 75 are fully tightened to fix the entirety.

FIG. 7 shows another conventional mounting structure (hereinafter referred to as conventional structure 2).
-52874. In FIG. 7, an L-shaped angle 92 is fixed to a house frame 91 by bolts 93. One end of the I-shaped bracket 94 is fixed by welding. The L-shaped angle 92 and the I-shaped bracket 94 are provided with elongated holes extending in the lateral direction. On the other hand, the side door 101 has a hinge 9
One piece 95a, 96a of 5, 96 is fixed by welding, and the other piece 95b, 96b of the hinge is provided with a bolt hole. These bolt holes and the long holes are bolts 97, 9
The side door 101 is fixed by being fastened by 8, 99, 100.

The conventional structure 2 has the configuration described above, and the operation of mounting the side door is performed as follows. First, the side door 101 is temporarily attached to the house frame 91. Next, the bolts 99 and 100 are removed, the bolt 93 is loosened, and the side door 101 is rotated together with the L-shaped angle 92 around the bolt 93 to adjust the inclination of the side door. next,
Loosen the bolts 97 to 100 and slide the side door 101 back and forth (in the direction of the long hole) to adjust the front and rear position.
Finally, the bolts are fully tightened and fixed.

[0012]

In the conventional structure 1, the hinge 70 of the side door is bolted to the house frame 66, and the house frame is connected to the base 65 of the platform.
It is bolted to. The house frame 66 is made by bending or welding an angle material or the like, and it is difficult to increase the accuracy because it is a large part. Therefore, the hole provided in the house frame for bolting to the base must be a fool hole considerably larger than the bolt diameter (for example, a hole having a diameter about 5 to 6 mm larger than the bolt diameter).

Further, since the mounting accuracy of the house frame 66 to the platform 53 (or the base 65) is not good for the above-mentioned reason, it is necessary to adjust the relative position between the platform 63 and the side door 58 (59). For this reason, the holes provided in the house frame for bolting the hinge 70 and the house frame need to be ridiculous holes. Therefore, between the platform and the side door, there is play between the hinge welded to the side door and the house frame, and play between the house frame and the platform. There is a problem that it becomes difficult and takes a long time.

In the conventional structure 2, the house frame 91 has L
The angled angle is bolted, the I-shaped bracket is fixed by welding, and the hinge welded to the side door is bolted to them. The position adjustment of the side door is performed by rotation of the L-shaped angle and the side door around the bolt 93, and the long holes provided in the L-shaped angle and the I-shaped bracket. Therefore, it is almost impossible to adjust the height position of the side door from the platform only by the above adjustment, and it is necessary to accurately mount the house frame to the platform, and thus there is a problem that the assembling of the house becomes difficult. . Furthermore, there is a problem that adjustment is necessary after the temporary attachment of the side door, and the operation becomes difficult and complicated.

The present invention has been made in view of the above background, and has as its object to provide a mounting structure that does not involve much difficulty in assembling a house and that can easily mount a side door.

[0016]

In order to solve the above problems, the present invention employs a configuration having the following features. That is, a side door mounting structure according to claim 1, wherein a house frame is fixed on a platform of a construction machine, and a side door or a house cover is mounted on the house frame. The structure is such that a bracket is interposed between the house frame and the side door, one piece of the hinge is fixed to the bracket, the other piece is fixed to the side door, and a plurality of bolt holes are provided in the bracket. The first bolt hole among the plurality of bolt holes is a bolt hole slightly larger than the bolt diameter, and the other bolt holes are fool holes or elongated holes larger than the bolt diameter, and the bracket is fixed to the house frame with bolts. It is characterized by.

The side door mounting structure according to claim 2 is
2. The apparatus according to claim 1, wherein the first bolt hole is provided at a lowermost portion as one of a plurality of bolt holes, and the bracket is fixedly mounted on a platform through the first bolt hole together with the house frame. It is characterized by being fastened to the base.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Note that the same components as those described in the related art are denoted by the same reference numerals, and detailed description is omitted. FIG. 1 shows the overall configuration of an embodiment of the present invention. 2A to 2C show details of fixing the bracket to the house frame. In FIG. 1, a base 65 is fixed on the platform 53 by welding,
5 is provided with a house frame 66.

Unlike the conventional apparatus, in the embodiment of the present invention, the side door 59 is attached to the house frame 66 via the bracket 1. That is, the side door 59
Is attached to the bracket 1 by hinges 70 and 71, and then the bracket 1 is attached to the house frame 66. In addition, the bracket 1 has a hinge 7
The mounting pieces 70b, 71b of the reference numerals 0, 71 are fixed to the bracket 1 by welding. Mounting bolt 2 on bracket 1
Bolt holes are provided at positions corresponding to. As described below, the first bolt holes 12 corresponding to the bolts 2 are round holes slightly larger in diameter than the bolt diameters, and the bolt holes 13 corresponding to the bolts 3 to 5 are sufficiently larger than the bolt diameters. A large long hole is provided. It should be noted that a large diameter fool hole may be used instead of the long hole. The house frame 66 is provided with a fool hole at a position where the bracket 1 is attached.

FIG. 2B is a sectional view taken along the arrow A in FIG. 1 and shows a state in which a house frame 66 is fixed to the base 65. A stupid hole 9 is provided at a position where the house frame 66 is attached, similarly to the conventional structure. In this embodiment, as can be seen from this figure, the house frame 66 is fastened together with the bracket 1 by means of the washer 79 with the mounting bolt 2. Further, the first bolt hole 12 of the bracket provided at the position corresponding to the bolt 2 is only slightly larger than the bolt diameter.

Accordingly, the mounting height of the bracket 1 is determined by the height of the female screw 80 of the base 65, so that the female screw 8
The position where it crosses zero is important. This is because the base 65 is smaller than the house frame and can be easily processed. Alternatively, as shown in FIG. (C), an idiot hole 7 may be provided in the base 65 and the nut 8 may be fixed to a predetermined position by welding.

FIG. 2A is a sectional view taken along the arrow B in FIG. 1 and shows a state in which the bracket 1 is fixed to the house frame 66. As can be seen from this figure, the bolt hole 13 is provided with an elongated hole longer in the height direction than the bolt diameter. on the other hand,
The back nut 23 is fixed to the house frame 66 on the back surface of the fool hole 10 by welding. Back nut 23 is stupid hole 9
Are fixed by welding so that the center-to-center distance is approximately a predetermined dimension. The “substantially predetermined size” is that the slot 1 is provided in the bracket 1 so that the position can be adjusted, and the bolt 3 can be easily attached and the back nut 23 can be easily welded. That's why. The bracket 1 is fixed to the house frame 66 by the mounting bolt 3 using the washer 77.

The cross section viewed from the arrow C and the cross section viewed from the arrow D in FIG. 1 are the same as those in FIG. 2A, and are not shown. The center-to-center distance between the back nut 23 in the B section and the back nut in the C section is set to a substantially predetermined size.

This embodiment has the configuration described above, and the side door is mounted as follows. First, all the house frames 66 are attached to the base 65 to create the entire framework. Next, the mounting bolts 2 of the base 65 at the part to which the side door 59 is to be mounted are removed, and are fastened together with the bracket 1. This joint may be hardened. Lastly, the mounting bolts 3, 4, and 5 may be sequentially screwed and fixed as shown in FIG. In this case, the bracket has large long holes 13 and 14 so that it can be easily bolted. The same applies to the side door 58, and the side door 58 is attached in the same manner.

In this embodiment, the side door is attached
The mounting height of the side door when the mounting bolt 2 is fixed,
Since the position is determined and the position of the mounting bolt hole of the base is accurately machined, there is no need to adjust the mounting height and position of the side door after mounting. Further, a back nut is provided at a substantially predetermined position on the house frame, and the mounting bolts 3, 4
The mounting work is easy because it is sufficient to insert it into the back nut and fix it to the back nut.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific structure is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. Even this is included in the present invention. For example, the number of the mounting bolts 3 and 4 for fixing the bracket 1 may be one. Further, the number of hinges is not limited to two. For example, three may be provided. Although the first bolt hole is provided at the lowermost position, the present invention is not limited to this.
It may be the th. Further, the number of first bolt holes is not limited to one, and a plurality of first bolt holes may be provided.

[0027]

As described above, according to the structure of the present invention, the following effects can be obtained. That is, according to the structure of the first aspect, since the bolt holes serving as the reference provided in the brackets may be accurately mounted, there is no need to adjust the mounting of the house frame, so that the effect of facilitating the mounting operation is obtained. In the structure of the second aspect, the reference hole is provided at the lowermost portion, and the reference hole is jointly fastened to the base together with the house frame, so that an effect of further facilitating the mounting operation can be obtained. According to the third aspect, since the back nut is fixed to the house frame, the bolt can be easily attached, and the effect that the operation is further facilitated can be obtained.

[Brief description of the drawings]

FIG. 1 shows the overall structure of an embodiment of the present invention.

FIGS. 2A and 2B are cross-sectional views taken along arrows in FIG. 1 and show details of a mounting portion. (C) shows another embodiment of FIG.

FIG. 3 shows an example of a construction machine using the embodiment.

4 shows a configuration of a part of the construction machine of FIG. 3 to which a side door is attached.

FIG. 5 shows a conventional mounting structure.

FIGS. 6A and 6B are cross-sectional views taken along arrows in FIG. 5 and show details of a mounting portion.

FIG. 7 shows another conventional mounting structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bracket 2-5 Mounting bolt 8, 10 Back nut 12 First bolt hole 13 Long hole (or stupid hole) for bolt installation 53 Platform of construction machine 58, 59 Side door 65 Base 66 House frame 70, 71 Hinge 70a, 71a Fixing piece (one piece of hinge) 70b, 71b Mounting piece (other piece of hinge)

Claims (2)

[Claims] 1. A house structure in which a house frame is fixedly mounted on a platform of a construction machine, and a side door or a house cover is mounted on the house frame. A bracket is interposed between the doors, one piece of the hinge is fixed to the bracket, the other piece is fixed to the side door, a plurality of bolt holes are provided in the bracket, and a first of the plurality of bolt holes is provided. The bolt hole is a bolt hole slightly larger than the bolt diameter, the other bolt hole is a fool hole or a long hole larger than the bolt diameter, and the bracket is fixed to the house frame with bolts. Door mounting structure. 2. The method according to claim 1, wherein the first bolt hole is provided at a lowermost portion of the plurality of bolt holes as one of the plurality of bolt holes, and the bracket is passed through the first bolt hole together with the house frame on the platform. The mounting structure for a side door of a construction machine according to claim 1, wherein the side door is fixed to a fixed base.