JP2008248607A - Step device of construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a step device of a construction machine facilitating access to an operator's cabin and inspections and maintenance and allowing a tool box to be installed thereon. <P>SOLUTION: This step device of a construction machine on which a revolving body having the operator's cabin and a power compartment is revolvingly installed on a carrier 1 allowed to travel comprises: fender mounting members 15 mounted at least one side of a vehicle body frame forming the carrier apart from each other in the longitudinal direction; the tool box 20 installed on the vehicle body frame through a supporting means between the fender mounting members; and vertically multiple stages of step members 22, 23 so installed on the vehicle body frame outside the tool box as to be parallel to the vehicle body frame and horizontally installed between the fender mounting members. The tool box is replaceable with a beam-like connection member 9. Consequently, the access to the operator's cabin and the inspections and maintenance are facilitated, and the tool box can be easily installed between the step members and the vehicle body frame. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a step device for a construction machine in which a turning body is installed on a traveling body.

Conventionally, a wheeled construction machine such as a wheel excavator has a revolving body that is installed on a self-propelled traveling body so that the revolving body can freely swivel, and a working machine, a cab, an engine, and the like are accommodated in the revolving body. There is a power room, and the traveling body is equipped with a step device to make it easy to get in and out of the driver's cab and to check and maintain the engine and various equipment housed in the power room of the swivel body. Yes.
In addition, the conventional step device includes a step device using a tool box as described in Patent Document 1, for example, in addition to a step device for facilitating getting on and off the driver's cab and inspecting and maintaining the power room.

In the step device described in Patent Document 1, an article storage unit including a casing for storing an article such as a tool is attached to the side of the main frame of the traveling body.
In addition, on the front and rear sides of the housing, another substantially inverted trapezoidal housing is attached, and the upper step member and the lower step member are horizontally mounted in two steps between the vertical surface plate and the inclined surface plate of the housing. It has become.
With the above-described configuration, it is possible to obtain an effect that, for example, a large space for storing articles can be secured after providing a step having an optimum size for an operator or the like to get on and off the cab.
JP-A-9-142217

However, the conventional step device described in Patent Document 1 has the following problems.
That is, the step device described in Patent Document 1 has a structure in which another casing is provided on the front and rear side surfaces of the central casing constituting the article storage portion, and step members are provided on these casings. Since the article storage unit is configured, there is a problem in that the structure is complicated and the weight of the entire step device becomes heavy.
Also, because the structure that supports the load applied to the step is supported by the central chassis, it is necessary to increase the rigidity and strength of the chassis by increasing the thickness of the board that forms the chassis, resulting in an increase in the weight of the chassis. There is also a problem that the manufacturing cost of the article storage unit increases.

On the other hand, as described above, the step device is used when inspecting and maintaining the engine, various devices, etc. in the power room installed in the revolving body in addition to getting on and off the cab. In the case where the step part is divided back and forth by the central frame like this, for example, when going out of the cab and inspecting and servicing the engine and various equipment, or conversely, when finishing the servicing and returning to the cab, Since it is necessary to repeat the operation of getting off the ground once using the steps before and after the chassis and then getting on again using the steps before and after that, there are also problems such as poor maintenance.
The present invention has been made to remedy such problems, and it is an object of the present invention to provide a step device for a construction machine that is easy to get in and out of a cab and to be inspected and maintained and that can also be installed with a tool box. .

  A step device for a construction machine according to the present invention is a step device for a construction machine in which a swivel body provided with a driver's cab, a power room, and the like is installed on a self-propelled traveling body so as to freely swivel. A fender attachment member provided on at least one side surface of the body frame to be separated in the front-rear direction, a tool box provided between the fender attachment members and attached to the vehicle body frame via support means, and a tool box Provided on the outer side so as to be parallel to the body frame and provided with a plurality of upper and lower step members horizontally mounted between the fender attachment members, and the tool box can be replaced with a beam-like connecting member. It is.

With the above configuration, when the inspection and maintenance of the engine and various equipment in the power room is completed, the driver moves to the cab side on the step member and enters the cab from the front end side of the step member, thereby driving without getting down to the ground. It is possible to get into the cabin, and when the operator goes out of the operator's cab and inspects and maintains the engine and various equipment in the motive power room, the operator can move on the step member to reach the motive power room. Thus, workability is significantly improved as compared with the case of repeatedly getting on and off after getting off the ground.
In addition, since the load acting on the step member is not directly applied to the tool box, the tool box itself does not require high rigidity, thereby increasing the plate thickness of the plate body forming the tool box and increasing the rigidity of the tool box. At the same time, it is not necessary to increase the strength, and at the same time, the fender mounting member also serves as a part of the front and rear fenders, so that the weight and cost of the tool box and the fender can be reduced.

  A step device for a construction machine according to the present invention is a step device for a construction machine in which a swivel body provided with a driver's cab, a power room, and the like is installed on a self-propelled traveling body so as to freely swivel. A fender attachment member provided on at least one side surface of the body frame to be spaced apart in the front-rear direction, a beam-like connection member horizontally disposed between the fender attachment members, and the vehicle body frame outside the connection member It is provided with a plurality of upper and lower step members which are provided so as to be parallel to each other and horizontally mounted between the fender attachment members, and a skeleton structure is configured by the connecting member, the fender member and the step member.

With the above configuration, when the inspection and maintenance of the engine and various equipment in the power room is completed, the driver moves to the cab side on the step member and enters the cab from the front end side of the step member, thereby driving without getting down to the ground. It is possible to get into the cabin, and when the operator goes out of the operator's cab and inspects and maintains the engine and various equipment in the motive power room, the operator can move on the step member to reach the motive power room. Thus, workability is significantly improved as compared with the case of repeatedly getting on and off after getting off the ground.
Further, when the support member is attached to the vehicle body frame side, the connecting member functions as a positioning gauge for setting the distance between each other to a predetermined value, so that the distance between the front and rear support members can be accurately set to a predetermined size. Can be assembled in advance as a single step, and can be easily attached to the vehicle body after that, and can be attached in a short time.From the parallelogram formed by each fender attachment member, connecting member and step member With this skeleton structure, twisting does not occur even during subassembly.

  According to the construction machine step device of the present invention, it is not necessary to repeat boarding and exiting for inspection and maintenance of the driver's cab and the engine and various devices in the power room. Since the load acting on the member is not directly applied to the tool box, the tool box itself does not require high rigidity, thereby increasing the plate thickness of the plate body forming the tool box to increase the rigidity and strength of the tool box. Since there is no need to increase the weight, the weight of the tool box can be reduced and the cost can be reduced.

Embodiments of the present invention will be described in detail with reference to the drawings.
1 is a perspective view showing a traveling body of a construction machine such as a wheel excavator, FIG. 2 is a perspective view of the vehicle body frame, FIG. 3 is an exploded perspective view of a step device, and FIG. 4 is taken along line AA in FIG. FIG. 5 is an exploded view of the same part.
A construction machine such as a wheel excavator shown in FIG. 1 includes a self-propelled traveling body 1 and a revolving body (not shown) that is rotatably installed on the traveling body 1. A work machine (both not shown) is provided.
As shown in FIG. 2, the traveling body 1 has a body frame 2 that is long in the front-rear direction, and a support base 3 for a turning mechanism (not shown) is installed at substantially the center of the body frame 2. The traveling body 1 and the swivel body are connected via the base 3.

A front wheel 4 and a rear wheel 5 that are rotationally driven by a power source (not shown) such as an engine provided on the revolving body side are provided on both front and rear sides of the vehicle body frame 2. The body 1 is self-propelled, and on both side surfaces of the body frame 2, a step device main body (hereinafter referred to as “device main body”) 6 is installed between the front and rear wheels 4, 5.
As shown in FIGS. 2 and 3, the apparatus main body 6 has a support member 7 fixed substantially vertically by a plurality of fixing tools 8 on a bracket 2 a protruding from the side surface of the vehicle body frame 2 in the front-rear direction.
The support member 7 is divided for each bracket 2a, and is formed of a substantially inverted trapezoidal plate body whose surfaces facing each other are formed substantially vertically. A pair of fixing members 8 are attached to the front surface of each support member 7 by a fixing tool 8. A fender mounting member 15 is fixed to the support bracket 12 and the oblique side surface of each support member 7 by a fixing tool 13.
The support bracket 12 has a substantially U-shaped longitudinal section, one end is fixed to the front surface of the support member 7, and the other end protrudes substantially horizontally to the side of the vehicle body frame 2. A substantially middle portion of the tool box mounting member 16 is fixed to the opposing surface in the vertical direction by a fixing tool 17.
The tool box mounting member 16 is formed of a plate material so that the cross section is substantially L-shaped, and is fastened to the support bracket 12 together with the side plate 20a of the tool box 20 together with the support bracket 12 as shown in FIG. In addition, the side surface of the upper step member 22 is fixed to the upper end portion of each tool box mounting member 16 by the fixing tool 21, and the side surface of the lower step member 23 is fixed to the lower end of the tool mounting member 16. It is fixed by the tool 24.
As shown in FIG. 2, the tool box 20 is formed in a substantially rectangular box shape with an open front, and both side plates 20a, top plate 20b, bottom plate 20c, and rear plate 20d are made of metal plates, and the support member 7 and a support bracket 12 and a tool box mounting member 16 are attached to the outer surface of the vehicle body frame 2 by support means.

The width of the tool box 20 in the traveling direction of the traveling body 1 is slightly smaller than the distance between the tool box mounting members 16, the height is smaller than the distance between the upper step member 22 and the lower step member 23, and The depth is formed so that the distance from the side surface of the body frame 2 to the distance between the body frame 2 of the upper step member 22 and the side surface of the upper step member 22, and the rear portion of the upper surface plate 20 b is inclined so as to be sequentially lowered. The rear plate 20d can be inserted between the members 22 and 23 so as to reach the vicinity of the side surface of the body frame 2.
The front opening of the tool box 20 is closed by a lid 20e.
The lid body 20e is hinged to the opening edge of the side plate 20a by a hinge 20f with respect to the traveling direction of the traveling body 1 so as to be safe even when it is inadvertently opened during traveling, and opens and closes around the hinge 20f. The opening edge of the side plate 20a opposite to the hinged side is provided with an L-shaped door stop 20g and locking means (not shown), and the lid 20e can be locked in the closed position by the locking means. It is like that.

On the other hand, the fender mounting member 15 fixed to the oblique side surface of the support member 7 includes an inclined plate 15a that is inclined at the same angle as the oblique side of the support member 7, a top plate 15b that is bent horizontally from the upper end of the inclined plate 15a, and an inclined surface. It consists of a plate 15a and an end plate 15c provided between the side edges of the top plate 15b. The edge of the end plate 15c is cut out in an arc shape in accordance with the curved surfaces of the outer circumferences of the front and rear wheels 4 and 5.
On the inclined plate 15a of the fender mounting member 15, step brackets 15d project from the upper and lower portions of the end plate mounting side (outside the body frame 2) so as to face each other. Both ends of the upper step member 22 are fixed by the fixing tool 25, and both ends of the lower step member 23 are fixed by the fixing tool 26 to the lower step bracket 15d. Step members 22 and 23 are horizontally mounted in two upper and lower stages.
The upper and lower step members 22 and 23 are formed by bending with a long and narrow metal plate so that the cross-section is U-shaped, and the upper step member 22 is formed longer than the lower step member 23. , 23 are provided with a number of anti-slip protrusions 22a, 23a formed by burring, and the upper edge of the outer side surface is scraped of earth and sand adhering to the shoe bottom and the like, and has anti-slip properties. A large number of saw-toothed projections 22b and 23b are provided.

An auxiliary step 30 is provided below the lower step member 23.
The auxiliary step 30 is attached to cope with a case where the construction machine is relatively large and the height from the ground to the lower step member 23 is high, and a plurality of widths in which the upper edge is formed in a sawtooth shape. The narrow plate member 30a is formed side by side in the vehicle width direction, and both ends of the auxiliary step 30 are inclined plates of the fender mounting member 15 by the fixing tool 29 via the elastic band plate 30b made of rubber or a metal plate. It is attached to the lower part of 15a.
The inclined plate 15a of the fender mounting member 15 serves as the rear portion of the front fender 31 and the front portion of the rear fender 32, and covers the upper surface of the front wheel 4 on the upper surface of the top plate 15b continuous with the upper end of the inclined plate 15a. An upper surface plate 31a of the front fender 31 and an upper surface plate 32a of the rear fender 32 covering the upper surface of the rear wheel 5 are fixed, and slips when the feet are put on the upper surfaces of the upper surface plates 31a and 32a. In order to prevent this, a number of anti-slip protrusions (not shown) are provided.

Side plates 31b and 32b are formed by bending the upper surface plates 31a and 32a of the front and rear fenders 31 and 32 on the end surfaces facing in the vehicle width direction, and the end portions of these side plates 31b and 32b are fixed to the upper surface of the vehicle body frame 2. ing.
Further, a mudguard 33 made of an elastic plate such as rubber is suspended at the rear end of the rear fender 32 covering the upper surface of the rear wheel 5 so as to prevent the muddy water and the like splashed up by the rear wheel 5 from splashing backward. It has become.

Next, the operation of the construction machine step device constructed as described above will be described.
In assembling the apparatus main body 6, first, the support members 7 are respectively fixed to the brackets 2 a protruding from both sides of the vehicle body frame 2 by the fixing tools 8. Then, the support bracket 12 is fastened together.
Next, when the tool box mounting member 16 is fixed to the front end of each support bracket 12 by the fixing tool 17 in the vertical direction, the inclined plate 15 a of the fender mounting member 15 is fixed to the oblique side surface of the support member 7 by the fixing tool 13.

Since the step brackets 15d are projected in two upper and lower steps in advance on the opposing surfaces of the fender attachment members 15 attached to the respective support members 7, the upper step member 22 having a long length is formed on the upper step bracket 15d. Both ends are fixed to the fixing tool 25, and both ends of the lower step member 23 having a short length are fixed to the lower step bracket 15 d by the fixing tool 26.
At this time, the intermediate portion of the upper step member 22 and the intermediate portion of the lower step member 23 are fixed to the upper and lower portions of the tool box mounting member 16 by the fixing members 21 and 24, thereby applying a load applied to each step member 22 and 23. Can be supported by the support bracket 12 via the tool box mounting member 16, so that even the long step members 22 and 23 are less likely to be bent or deformed by a load.
When the attachment of the upper and lower stages 22 and 23 is completed as described above, the auxiliary step 30 is attached, but this operation is omitted when the auxiliary step 30 is unnecessary.
The attachment of the auxiliary step 30 is completed by fixing the upper end of the elastic band plate 30b attached in advance to both ends of the plate member 30a of the auxiliary step 30 to the lower part of the fender attachment member 15 by the fixing tool 29, thereby the upper and lower steps. A three-stage step device is obtained by the members 22 and 23 and the auxiliary step 30.

On the other hand, the tool box 20 attached to the apparatus main body 6 may be provided on one of the left and right sides of the body frame 2 and may be provided on both sides of the body frame 2, and the tool box 20 installed on the left side of the body frame 2. In the tool box 20 installed on the right side, the position of the hinge 20f that hinges the lid 20e is different from right to left.
That is, the position of the hinge 20f can be changed so that the hinge 20f is on the front side in the traveling direction when it is attached to the vehicle body frame 2 so that it is safe even if the lid 20e is inadvertently opened while the traveling body 1 is traveling. It is like that.
When mounting the tool box 20, the tool box 20 is inserted between the upper and lower step members 22 and 23 and between the tool box mounting members 16, and the front surface of the tool box 20 has upper and lower step members 22 and 23. As shown in FIG. 4, the fixing tool 17 is screwed into the support bracket 12 and the support member 7 from the inside of the tool box 20 as shown in FIG. The support member 7 and the support bracket 12 are fixed to each other.

As a result, the weight of the tool box 20 and the load of the tools housed in the tool box 20 are shared and supported by the support member 7 and the support bracket 12, but are supported by the upper and lower step members 22 and 23 and the auxiliary step 30. Since the acting load is not directly applied to the tool box 20, the tool box 20 itself does not require high rigidity.
When the apparatus main body 6 is installed on both sides of the vehicle body frame 2, the front fender 31 covering the upper side of the front wheel 4 is attached to the top plate 15 b of the front fender attachment member 15 and the upper surface of the vehicle body frame 2, and the upper surface of the rear wheel 5 is attached. The rear fender 32 to be covered is attached to the top plate 15 b of the rear fender attachment member 15 and the upper surface of the vehicle body frame 2.

Next, the operation at the time of use of the step device assembled as described above will be described.
Tools necessary for maintenance of the construction machine and the like are stored in the tool box 20 in advance, and the lid 20e is locked by a locking means so that the lid 20e is not opened carelessly.
Use the auxiliary step 30 and the lower step member 23 when inspecting and servicing the engine and various equipment before the operator gets on the cab of the construction machine that is stopped at the work site and starts work. The upper step member 22 is then climbed, and in this state, the doors of the power chamber (none of which are shown) are opened for inspection and maintenance.
When the inspection and maintenance are completed and the door of the power room is closed, the upper part of the step member 22 is moved to the driver's cab side, and the driver's cab is moved to the driver's cab from the front end side of the step member 22 without getting down to the ground. Also, when the operator leaves the operator's cab and inspects and maintains the engine and various equipment in the power room, the operator can move on the upper step member 22, so that once it is on the ground as before, The workability is significantly improved compared to the case of repeatedly getting on and off after getting off.

  Further, since the step members 22 and 23 are provided with anti-slip protrusions 22a and 23a on the upper surface, when the step members 22 and 23 are moved on and off or moved sideways, the feet are slipped from the step members 22 and 23. In addition, since the earth and sand adhering to the back side of the shoe can be scraped off by the saw-like projections 22b and 23b, the earth and sand adhering to the back side of the shoe is prevented from accumulating on the step members 22 and 23. You can also.

On the other hand, even if the auxiliary step 30 collides with an obstacle such as a rock protruding on the ground while the construction machine is moving on rough terrain, the elastic band plate 30b of the auxiliary step 30 is elastically deformed to absorb the impact. It is possible to prevent the step from being damaged.
Since the tool box 20 is installed between the front and rear fender mounting members 15 and the front surface of the tool box 20 does not protrude outward from the step members 22 and 23, the tool box 20 collides with an obstacle and is damaged. There is no fear of doing it.

The above is an embodiment in which the tool box 20 is attached to both side surfaces of the body frame 2. However, in the case where only one side of the body frame 2 or the tool box 20 is not attached at all, another embodiment shown in FIG. In this way, the connecting member 9 is attached instead of the tool box 20.
That is, by laying a connecting member 9 made of a mold material such as an angle between the upper side portions of the supporting member 7 divided for each bracket 2a, and fixing each supporting member 7 and the connecting member 9 with the fixing tool 10, The support members 7 are connected to each other.
As a result, the fender mounting member 15, the connecting member 9, and the step members 22, 23 are formed with respect to the unbalanced load applied to the step members 22, 23 when an operator or the like gets on and off the cab using the step device. The strength of the step body 6 can be sufficiently maintained without providing the tool box 20 in order to disperse and support the uneven load by the skeleton structure made of parallelograms and to prevent the fender attachment member 15 from being twisted. Become.

Further, when the support member 7 is attached to the bracket 2a on the vehicle body frame 2, the connecting member 9 functions as a positioning gauge for setting the distance between the support members 7 to a predetermined value, so that the distance between the support members 7 is accurately set to the predetermined value. Thus, even when the tool box is not attached, the step device can be accurately attached to a predetermined position, and the step device can be attached to the vehicle body frame 2 by sub-assembly in advance. Since the step device is not twisted during attachment, the step device can be easily attached to the vehicle body frame 2.
In the above-described embodiment, the construction machine such as a wheel excavator has been described. However, the construction machine can be applied to a wheeled hydraulic excavator or a construction machine including a traveling body and a revolving body.

It is a perspective view which shows the traveling body of the construction machine which installed the step apparatus which becomes embodiment of this invention. It is a perspective view which shows the step apparatus of the construction machine which becomes embodiment of this invention. It is a disassembled perspective view which shows the step apparatus of the construction machine which becomes embodiment of this invention. It is a fragmentary sectional view which follows the AA line of FIG. FIG. 5 is an exploded view of FIG. 4. It is a perspective view which shows the step apparatus of the construction machine which becomes another embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling body 2 Body frame 4 Front wheel 5 Rear wheel 7 Support member 9 Connecting member 15 Fender attachment member 20 Tool box 22 Step member 23 Step member 31 Front fender 32 Rear fender

Claims (2)

A step device for a construction machine in which a swivel body provided with a driver's cab, a power room, and the like is disposed on a self-propelled traveling body,
A fender mounting member provided on at least one side surface of the vehicle body frame constituting the traveling body and spaced apart in the front-rear direction;
A tool box provided between the fender attachment members and attached to the body frame via support means;
A plurality of upper and lower step members provided on the outer side of the tool box with respect to the body frame so as to be parallel to the body frame and horizontally mounted between the fender attachment members;
A step device for a construction machine, wherein the tool box is configured to be replaceable with a beam-like connecting member. A step device for a construction machine in which a swivel body provided with a driver's cab, a power room, and the like is disposed on a self-propelled traveling body,
A fender mounting member provided on at least one side surface of the vehicle body frame constituting the traveling body and spaced apart in the front-rear direction;
A beam-shaped connecting member laid horizontally between these fender mounting members;
A plurality of upper and lower step members provided on the outer side of the connecting member with respect to the body frame so as to be parallel to the body frame and horizontally mounted between the fender mounting members;
A step device for a construction machine, wherein a skeleton structure is configured by the connecting member, the fender member, and the step member.

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