JP4033102B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine, and particularly relates to measures for improving workability of maintenance work.

  Conventionally, in a mini excavator as a small construction machine, an engine is often arranged below a control seat in order to make the upper swing body as compact as possible. 7 and 8, the top plate 72 of the guard cover 71 to which the control seat is fixed can be opened upward so that the maintenance of the engine 74 can be performed. . For example, in the construction machine disclosed in Patent Document 1, the top plate 72 is opened forward by providing a hinge at the front end portion of the top plate 72 of the guard cover 71. The engine 74 disposed below the top plate 72 and the devices disposed around the engine 74 can be maintained.

On the other hand, in the construction machine described in the document, a storage box 75 in which devices such as relays are arranged is arranged in a gap between the top plate 72 and the engine 74. As a result, a space is formed at the foot of the control seat, and a blowout port 77 for blowing warm air from the heater 76 is arranged in this space. In this construction machine, since the heater 76 is disposed on the side of the engine 74, it is necessary to install a duct 78 that connects the heater 76 and the outlet 77 so as to be routed forward from the side of the engine 74. .
JP 2001-32327 A

  By the way, in the conventional thing disclosed by the said literature, there existed a problem that the maintenance operation | work of the engine and the apparatus arrange | positioned around it could not be performed efficiently.

  Specifically, since the conventional one is configured to open the top plate 72 of the guard cover 71, it is necessary to insert a hand from above the engine when performing maintenance work. It was hard. In addition, it is difficult to perform maintenance on the devices arranged in front of or below the engine, and in such a configuration, the workability of the maintenance work is poor.

  Further, since a heater 76 for blowing warm air into the operation space and a duct 78 for blowing warm air are installed around the engine 74, the heater 76, the duct 78, etc. perform maintenance work. It became an obstacle at the time, and the workability of the maintenance work was poor.

  The present invention has been made in view of such points, and an object thereof is to improve the workability of maintenance work.

In order to achieve the above-mentioned object, the present invention is configured to attach a heater to the maintenance cover by forming an opening for maintenance across the upper shielding plate and the front shielding plate that shield the upper or front side of the engine. Alternatively, a heater is attached to a maintenance cover for closing a maintenance opening formed in the upper shielding plate or the front shielding plate.

Specifically, the invention of claim 1 includes an upper shielding plate that shields the upper side of the engine, a front shielding plate that is joined to the upper shielding plate and shields the front of the engine, and the upper shielding plate and the front portion. A maintenance opening formed across the shielding plate, a maintenance cover for closing the opening, and a fixing member provided on the maintenance cover for fixing the heater , the fixing member There is a heater attached .

  In this invention, the opening for maintenance is provided so as to straddle the upper shielding plate and the front shielding plate. Therefore, unlike the conventional configuration in which the opening is provided only in the top plate provided above the engine, the maintenance opening can be formed in a larger opening in the present invention. Therefore, when performing maintenance work on the engine and the devices disposed around the engine, the maintenance work can be performed through the large opening, so that the workability of the maintenance work can be improved. Moreover, when performing maintenance work on the devices, the operator is not restricted to work by extending his hand from above the engine, and can also perform maintenance work by extending his hand from the front of the engine. It becomes. For this reason, when performing maintenance work of equipment arranged in front of or below the engine, the work efficiency can be improved. Furthermore, the work done by extending the hand from the top of the engine is a very heavy work for the operator, but the work can be done by extending the hand from the front of the engine, making maintenance work easier. Will be able to do.

Furthermore, because the heater is Ru is fixed to the maintenance cover through the fixing member, by removing the maintenance cover, the heater also becomes possible to be removed together with the cover for maintenance. Therefore, according to the present invention, the heater does not become an obstacle in the maintenance work performed through the opening, and the workability of the maintenance work can be further improved.

The invention of claim 2 is the construction machine according to claim 1, wherein the upper shielding plate and the front shielding plate, recesses in the shape from falling toward the engine including the joint portion is formed, The opening is formed in the recess, and the fixing member and the heater are disposed in the recess.

  In this invention, since the fixing member and the heater are arranged in the recesses formed in the upper shielding plate and the front shielding plate, the fixing member and the heater can be arranged so as not to protrude from the shielding plate.

Further, the invention of claim 3 is the construction machine according to claim 1 or 2 , wherein the front of the front shielding plate is configured as an operating space, and the heater is located above the floor surface of the operating space. Arranged in a floating state.

  In the present invention, since the heater is disposed so as to be positioned above the floor surface, a space for the operator's feet in the operation space, particularly a space for disposing a particularly important kite can be taken. In addition, in the structure which covers a heater cover on a heater, the arrangement | positioning space of a collar can be ensured by forming this heater cover in the form in which the lower part was dented.

According to a fourth aspect of the present invention, in the construction machine according to any one of the first to third aspects, the front of the front shielding plate is configured as an operating space, and a heater cover is provided on the front side of the heater. The heater cover is provided with a blow-out passage for blowing warm air into the operation space.

  In this invention, the front of the front shielding plate is configured as an operation space. Since the heater cover arranged on the front side of the heater is provided with a hot air blowing passage to the operation space, unlike the conventional arrangement in which the heater is arranged on the side of the engine, the side of the engine Therefore, a duct for blowing warm air from the direction to the front of the engine, that is, the rear of the operation space is not necessary. In addition, since the heater is not installed on the side of the engine, an empty space can be secured on the side of the engine. Thereby, the space around the driving space can be saved. Furthermore, in the present invention, since the warm air heated by the heater arranged immediately behind the operation space is blown directly to the operation space without passing through the duct, the heating efficiency of the operation space by the heater is improved. Can do.

According to a fifth aspect of the present invention, in the construction machine according to the fourth aspect , the heater cover is integrally provided with a seat for the operator to sit on.

  In the present invention, when the heater cover is removed, the seat can be removed together, so that the seat can be kept out of the way during maintenance.

According to a sixth aspect of the present invention, there is provided an upper shielding plate that shields the upper side of the engine, a front shielding plate that shields the front of the engine, and one of the upper shielding plate and the front shielding plate. , An maintenance cover for closing the opening, and a fixing member provided on the maintenance cover for fixing the heater, and the heater is attached to the fixing member.

  In this invention, since the heater is fixed to the maintenance cover via the fixing member, if the maintenance cover is removed, the heater is also removed together with the maintenance cover. Therefore, according to the present invention, the heater does not become an obstacle in the maintenance work performed through the opening, and the workability of the maintenance work can be improved.

Further, the invention of claim 7 is the construction machine according to claim 6 , wherein the front of the front shielding plate is configured as an operation space, and the heater is floated above the floor surface of the operation space. Arranged in a state.

  In the present invention, since the heater is disposed so as to be positioned above the floor surface, a space for the operator's feet in the operation space, particularly a space for disposing a particularly important kite can be taken. In addition, in the structure which covers a heater cover on a heater, the arrangement | positioning space of a collar can be ensured by forming this heater cover in the form in which the lower part was dented.

As described above, according to the first to fifth aspects of the present invention, since the opening for maintenance is provided across the upper shielding plate and the front shielding plate, it is provided above the engine as in the prior art. Unlike the configuration in which the opening is provided only on the top plate, it is possible to form a larger opening as an opening for maintenance. Therefore, when maintenance work is performed on the engine and the devices disposed around the engine, the maintenance work can be performed through the large opening, so that the workability of the maintenance work can be improved. Moreover, not only the maintenance work can be performed easily, but also the work efficiency can be improved particularly when the maintenance work of the devices arranged in front of or below the engine is performed. Furthermore, since the heater is fixed to the maintenance cover, the heater can be removed together with the maintenance cover. As a result, the heater does not become an obstacle in the maintenance work performed through the opening, and the workability of the maintenance work can be further improved.

According to the inventions of claims 6 and 7 , the heater is fixed to the maintenance cover, so that the heater can be removed together with the maintenance cover. As a result, the heater does not become an obstacle during the maintenance work, and the workability of the maintenance work can be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  Although not shown in the drawings, the present embodiment is applied to a construction machine such as a hydraulic mini excavator provided with a lower traveling body and an upper swinging body provided on the upper portion of the lower traveling body so as to be freely rotatable. It is.

  As shown in FIG. 1, an operation space 12 is provided in the upper swing body. The operation space 12 is provided with a seat stand 15 provided at the rear portion of the operation space 12 and a control stand 17 disposed adjacent to the side of the seat stand 15.

  In the present embodiment, the control stand 17 is located on the back side (left side in FIG. 1) opposite to the boarding / alighting side (right side in FIG. 1) on which the operator gets on and off, that is, on the right side of the seat stand 15. Is placed only in. Although not shown, a control box provided with operation levers, switches and the like is provided behind and above the control stand 17.

  The seat stand 15 is configured in a box shape, and an upper surface portion 15a, a front wall portion 15b, a left side wall portion 15c, and a rear side wall portion (not shown) are integrally formed by welding or the like. It is a thing. The seat stand 15 has an open bottom surface and is fixed to a floor plate (not shown) that constitutes the floor surface of the upper swing body.

  Although not shown, equipment such as an engine is disposed below the seat stand 15, that is, behind the operation space 12. And the upper surface part 15a of the seat stand 15 is arrange | positioned so that it may extend in the horizontal direction above this engine, and this upper surface part 15a comprises the upper shielding board which shields the engine upper direction. Further, the front wall portion 15b of the seat stand 15 is disposed so as to extend in a substantially vertical direction in front of the engine, and the front wall portion 15b constitutes a front shielding plate that shields the front of the engine. .

  A seat 19 for the operator to sit on is provided on the upper surface portion 15a of the seat stand 15, and a heater cover 21 is provided on the front wall portion 15b. Details of the heater cover 21 will be described later.

  As shown in FIG. 2, the seat stand 15 and the control stand 17 are integrally formed in a bowl shape in plan view. Specifically, a control stand 17 is disposed adjacent to the right side of the seat stand 15 when viewed from the front, and the control stand 17 bulges forward from the front wall portion 15 b of the seat stand 15. It is formed in such a form. The lower surface of the control stand 17 is opened and fixed to the floor plate.

  The insides of the seat stand 15 and the control stand 17 are partitioned into one large space. In this inner space, equipment such as the engine and parts are accommodated. Although not shown, an alternator, a starter and the like are disposed around the engine. The alternator and the starter are disposed between the engine and the front wall portion 15 b of the seat stand 15.

  On the upper surface portion 15a and the front wall portion 15b of the seat stand 15, a concave portion 15d is formed at the center in the left-right direction of the portion including the joint portion. The concave portion 15d is formed such that a portion including the joint portion located at the front end of the upper surface portion 15a falls toward the engine, that is, rearward and downward. The concave portion 15d is bent step by step. It is formed in the shape.

  The seat stand 15 has a large opening 25 at the center in the left-right direction. The opening 25 is formed from the upper surface portion 15a to the front wall portion 15b so as to straddle the concave portion 15d. This opening 25 is an opening for maintenance, and is formed in a size that takes into account maintenance work for the engine and devices disposed in the vicinity thereof.

  As shown in FIG. 2, a maintenance cover 27 for closing the opening 25 is attached to the opening 25. As shown in FIGS. 3 to 5, the maintenance cover 27 is formed in a shape corresponding to the opening 25, so that the opening 25 can be closed without a gap. Specifically, the maintenance cover 27 is connected to an upper portion 27a corresponding to the upper surface portion 15a of the seat stand 15, an intermediate portion 27b connected to the lower side of the upper portion 27a, and a lower side of the intermediate portion 27b. And a lower side portion 27c corresponding to the front wall portion 15b. That is, the maintenance cover 27 is formed of a single plate having a shape that is bent step by step so as to correspond to the upper surface portion 15a, the recessed portion 15d, and the front wall portion 15b of the seat stand 15.

  In the maintenance cover 27, bolt insertion holes 27d are formed in the upper portion 27a, the intermediate portion 27b, and the lower portion 27c, respectively. The maintenance cover 27 is configured to be detachable from the opening 25 by fastening with a bolt (not shown).

  The maintenance cover 27 is integrally provided with a heater fixing bracket 33 as a fixing member. The bracket 33 is for fixing the heater 31 that blows warm air into the operation space 12. The bracket 33 is attached to the upper surface side (front surface side) of the intermediate portion 27 b of the maintenance cover 27. The bracket 33 includes a main body portion 33a formed in a flat plate shape extending in the vertical direction, a leg portion 33b joined to the lower end portion of the main body portion 33a, and a support portion 33c joined to the upper end portion of the main body portion 33a. ing. The leg portion 33b extends horizontally from the lower end portion of the main body portion 33a, and is joined to the intermediate portion 27b of the maintenance cover 27 at the distal end portion thereof. The main body portion 33a is bent at a substantially right angle at the upper end portion thereof, and the support portion 33c is fastened to the bent portion of the main body portion 33a. The support portion 33c is formed in a substantially rectangular flat plate shape that extends horizontally from the upper end portion of the main body portion 33a. The support portion 33c is configured to fix the heater 31 so that the heater 31 is suspended. In FIG. 2, the support portion 33c is omitted for the sake of convenience, and in FIGS. 3 to 5, the support portion 33c is indicated by a virtual line.

  The heater 31 is disposed between the support portion 33 c and the maintenance cover 27. The heater 31 and the bracket 33 are disposed so as to be accommodated in the recess 15d of the seat stand 15. As a result, the heater 31 is arranged in a state of floating above the floor surface.

  The main body 33a is provided with a circular opening 33d. The opening 33 d is provided to prevent a part of the heater 31 from interfering with the bracket 33.

  The heater 31 has a substantially cylindrical casing 31a, and the casing 31a is connected to the engine by a hose not shown. The heater 31 is configured to heat the air using the cooling water as a heat source when engine cooling water is introduced into the casing 31a through the hose. That is, the heater 31 is fixed to the maintenance cover 27 while being connected to the engine by a hose. Therefore, when the maintenance cover 27 is removed from the seat stand 15, the maintenance cover 27 can be moved within the reach of the hose. In addition, the heater 31 is shown with the virtual line for convenience in FIG.2 and FIG.4.

  A blowing passage 31b having a substantially rectangular cross section is disposed on the front side of the casing 31a. The blowing passage 31 b is provided in the heater cover 21 and is configured to blow air heated in the casing 31 a of the heater 31 and blow the air toward the operation space 12.

  As shown in FIG. 6, the heater cover 21 is formed in a substantially rectangular deep dish shape, and is attached to the seat stand 15 so that the open surface is located on the rear side. The heater cover 21 is attached by fastening with a bolt (not shown), for example. Two bolt insertion holes 21d are formed in the rear end portion of the upper surface portion 21a of the heater cover 21, and two notch portions 21e for inserting bolts are formed in the lower end portion of the front surface portion 21b. The heater cover 21 is disposed immediately below the front end portion of the seat 19, and is disposed so that the upper surface portion 21 a is located on substantially the same plane as the upper surface portion 15 a of the seat stand 15.

  The heater 31 is accommodated inside the heater cover 21. The front surface portion 21 b of the heater cover 21 is provided with a hot air outlet 21 c so as to communicate with the outlet passage 31 b of the heater 31. The front surface portion 21b of the heater cover 21 is formed in a shape in which a lower portion is recessed from the blowout port 21c. That is, in the front surface portion 21b, the lower portion below the air outlet 21c is recessed toward the rear of the machine body rather than the upper portion where the air outlet 21c is present. As a result, the space for placing the driver's heel is expanded rearward.

  As shown in FIG. 1, the seat 19 is attached to the heater cover 21 with an attachment plate 37 interposed therebetween. The mounting plate 37 is configured to be folded in half with a hinge provided at the front end. The mounting plate 37 is fixed to the upper surface portion 21a of the heater cover 21 in a folded state, and the sheet 19 is fixed to the mounting plate 37 in this state. That is, the heater cover 21 and the seat 19 are integrally provided.

  When removing the maintenance cover 27 at the time of maintenance or the like, the seat 19 and the heater cover 21 are integrally removed. At this time, the mounting plate 37 is first unfolded, the seat 19 is tilted forward, and the bolts for fastening the upper surface portion 21a of the heater cover 21 to the seat stand 15 are removed. Further, the heater cover 21 can be removed from the seat stand 15 by removing the bolts on the front surface portion 21 b of the heater cover 21. At this time, the seat 19 is integrated with the heater cover 21 via the mounting plate 37, and the seat 19 and the heater cover 21 are removed together.

  Then, by removing the bolts fixing the maintenance cover 27, the maintenance cover 27 is removed, and the opening 25 of the seat stand 15 is opened. At this time, the heater 31 is removed from the seat stand 15 together with the maintenance cover 27. Also at this time, the heater 31 is connected to the engine by a hose, so that the maintenance cover 27 can be moved within the reach of the hose. For this reason, when it is desired to remove the maintenance cover 27 while the engine is being driven, the opening 25 can be opened without stopping the heater 31.

  In this embodiment, as shown in FIG. 2, an opening 41 formed so as to straddle the seat stand 15 and the control stand 17 is provided. The opening 41 is located near the foot of the right foot of the operator. The opening 41 can be used for maintenance of an alternator disposed in front of the engine or a tank (not shown) disposed in the control stand 17, for example. As shown in FIG. 1, a cover 42 for closing the opening 41 is bolted to the opening 41. The opening 41 can be omitted.

  Next, the effect by the construction machine which concerns on this embodiment is demonstrated.

  In the construction machine according to the present embodiment, the maintenance opening 25 is provided so as to straddle the upper surface portion 15 a and the front wall portion 15 b of the seat stand 15. For this reason, unlike the conventional configuration in which the opening is provided only on the top plate provided above the engine, the construction machine according to the present embodiment can form the opening 25 for maintenance in a larger opening. It becomes. Therefore, when maintenance work is performed on the engine and the devices disposed around the engine, the maintenance work can be performed through the large opening 25, so that the workability of the maintenance work can be improved. Moreover, when performing maintenance work on the devices, the operator is not restricted to work by extending his hand from above the engine, and can also perform maintenance work by extending his hand from the front of the engine. It becomes. For this reason, working efficiency can be improved especially when performing maintenance work of equipment arranged in front of or below the engine such as an alternator or starter. Furthermore, the work done by extending the hand from the top of the engine is a very heavy work for the operator, but the work can be done by extending the hand from the front of the engine, making maintenance work easier. Will be able to do.

  In the present embodiment, the heater 31 is fixed to the maintenance cover 27 via the bracket 33. For this reason, if the maintenance cover 27 is removed, the heater 33 is also removed together with the maintenance cover 31. Therefore, the heater 31 does not become an obstacle in the maintenance work performed through the opening 25, and the workability of the maintenance work can be further improved.

  Further, in the present embodiment, the recess 15d is provided in the seat stand 15, and the bracket 33 is provided in the portion of the maintenance cover 27 corresponding to the recess 15d, so that the heater 31 does not protrude from the seat stand 15. Can be arranged. That is, in order to effectively use the space in front of the engine that has been relatively spacious in the past in the seat stand 15, the front portion of the seat stand 15 is recessed, and the heater 31 is disposed in the recessed portion. Yes. As a result, in the present embodiment, it is possible to effectively use a vacant space and avoid an increase in the size of the seat stand 15.

  Further, in the present embodiment, the front of the front wall portion 15 b of the seat stand 15 is configured as the driving space 12. A heater cover 21 is provided on the front side of the heater 31, and a blow-off passage 31b and a blow-out opening 21c for blowing warm air to the operation space 12 are provided in the heater cover 21. Unlike the configuration in which a heater is disposed on the side of the engine, a duct for blowing warm air from the side of the engine to the front of the engine, that is, the rear of the operation space 12 is not required. In addition, since the heater 31 is not installed on the side of the engine, a space can be secured on the side of the engine. Thereby, the space around the driving space 12 can be saved.

  Moreover, in this embodiment, while arrange | positioning so that the heater 31 may be located above the floor surface of the driving | running | working space 12, the heater cover 21 should be formed in the form where the lower part was dented according to this. Therefore, it is possible to take a wide space for the operator's feet in the driving space 12, particularly a space for arranging the particularly important kites.

  In the present embodiment, since the seat 19 is provided integrally with the heater cover 21, when the heater cover 21 is removed, the seat 19 can be removed together, so that the seat 19 does not get in the way during maintenance. Can be.

<< Other Embodiments >>
The present invention may be configured as follows with respect to the embodiment.

  In the above embodiment, the maintenance opening 25 is formed from the upper surface portion 15a of the seat stand 15 to the front wall portion 15b. Instead, the maintenance opening 25 is provided in front of the seat stand 15. It is good also as a structure formed only in the wall part 15b or only the upper surface part 15a. In this case, the maintenance cover 27 is configured to have a shape corresponding to the opening 25, and a bracket 33 for fixing the heater 31 is attached to the maintenance cover 27. For this reason, when the opening part 25 is formed in the front wall part 15b of the seat stand 15, the heater 31 is installed in the front side of this front wall part 15b. When the opening 25 is formed in the upper surface portion 15a of the seat stand 15, the heater 31 is installed on the upper surface portion 15a. And when the heater 31 is installed in the front side of the front wall part 15b, it is good to provide the recessed part which falls in this front wall part 15b back, and to arrange | position the heater 31 in this recessed part. In addition, when the heater 31 is installed on the upper side of the upper surface portion 15a, a concave portion that falls downward is provided on the upper surface portion, and the heater 31 may be installed in the concave portion.

  Even in such a configuration, since the heater 31 is fixed to the maintenance cover 27 via the bracket 33, if the maintenance cover 27 is removed, the heater 31 is also removed together with the maintenance cover 27. . Therefore, the heater 31 does not become an obstacle in the maintenance work performed through the opening 25, and the workability of the maintenance work can be improved.

It is a perspective view which shows the state which mounted | wore the seat stand in the embodiment of this invention with the sheet | seat and the heater cover. It is a perspective view which shows the whole structure of the seat stand and control stand in embodiment of this invention. It is a front view which shows the cover for a maintenance in embodiment of this invention with a bracket. It is a side view which shows the cover for maintenance in embodiment of this invention with a bracket. It is a top view which shows the cover for maintenance in embodiment of this invention with a bracket. It is a perspective view which shows the whole structure of a heater cover. It is a side view which shows the guard cover in the conventional construction machine. It is a top view which shows the arrangement structure of the heater and duct in the conventional construction machine.

Explanation of symbols

12 Operating space 15 Seat stand 15a Upper surface (upper shielding plate)
15b Front wall (front shielding plate)
15d Recess 19 Sheet 21 Heater cover 25 Opening 27 Maintenance cover 31 Heater 31b Blow-out passage 33 Bracket (fixing member)

Claims (7)

An upper shielding plate that shields the top of the engine;
A front shield that is joined to the upper shield and shields the front of the engine;
Maintenance opening formed across the upper shielding plate and the front shielding plate,
A maintenance cover for closing the opening ;
Provided in the maintenance cover, and a fixing member for fixing the heater ,
A construction machine in which a heater is attached to the fixed member . The upper shielding plate and the front shielding plate are formed with a concave portion that has a shape that falls toward the engine including the joint portion.
The opening is formed in the recess,
Construction machine according to claim 1, wherein the fixing member and the heater is disposed in the recess. The front of the front shielding plate is configured as a driving space,
The construction machine according to claim 1 or 2 , wherein the heater is arranged in a state of being floated above a floor surface of the operation space. The front of the front shielding plate is configured as a driving space,
A heater cover is provided on the front side of the heater,
The construction machine according to any one of claims 1 to 3 , wherein the heater cover is provided with a blowing passage for blowing warm air to the operation space. The construction machine according to claim 4 , wherein the heater cover is integrally provided with a seat for a driver to sit on. An upper shielding plate that shields the top of the engine;
A front shielding plate for shielding the front of the engine;
An opening for maintenance formed on one of the upper shielding plate or the front shielding plate,
A maintenance cover for closing the opening;
Provided in the maintenance cover, and a fixing member for fixing the heater,
A construction machine in which a heater is attached to the fixed member. The front of the front shielding plate is configured as a driving space,
The construction machine according to claim 6 , wherein the heater is arranged in a state of floating above a floor surface of the operation space.