JP4994120B2 - Cab floor - Google Patents

Description

  The present invention relates to a cab floor mounted on a work machine.

  2. Description of the Related Art Conventionally, a cab floor mounted on a work machine has a configuration including a substantially horizontal floor as disclosed in, for example, Japanese Patent Application Laid-Open Nos. 2005-1418 and 2003-49452. In order to horizontally configure the floor of the cab, the floor must be configured at a height position that can accommodate a device having a high dimension among devices disposed below the floor. For this reason, as the space in the lower part of the floor, the upper space in the part accommodating a small device or the like is widely configured, and a useless space is provided.

  In addition, a construction machine (see Patent Document 1) is proposed in which the cab floor is configured with a double floor plate structure of a lower floor plate and an upper floor plate provided on the upper side of the lower floor plate, and an air conditioning unit housing recess is formed in the lower floor plate. ing. FIG. 3 is a perspective view showing the lower floor board 31 and the upper floor board 32 as the prior art 1 of the present invention, which is the construction machine described in Patent Document 1.

As shown in FIG. 3, the floor on the front side of a pedestal 34 that supports a driver's seat (not shown) includes a lower floor board 31 in which an air conditioning unit housing recess 31a is formed, an upper floor board 32 and a floor placed on the upper side of the lower floor board 31. It consists of a mat 33. After the air conditioning unit 35 is stored in the air conditioning unit storage recess 31a, the air conditioning unit 35 can be covered with the upper floor plate 32.
JP 2005-226307 A

  In the cab of the construction machine described in Patent Document 1, it can be configured as a floor surface having a step by the upper floor plate 32, but the floor configuration is a double floor plate structure of the lower floor plate 31 and the upper floor plate 32. It is constituted by. For this reason, large and small upper spaces are formed between the lower surface of the lower floor plate 31 that houses the air conditioning unit 35 and the devices disposed below the lower floor plate 31 depending on the size of the disposed devices. Will end up.

  Further, the step formed on the upper floor board 32 is formed on one end side of the upper floor board 32. For this reason, even if a certain level of strength is obtained by the step portion as the upper floor plate 32, the strength is not significantly improved as compared with the flat floor plate.

  Further, when the depth of the air conditioning unit storage recess 31a is configured deeper, the storage space in the lower part of the air conditioning unit storage recess 31a becomes further narrower than the horizontally configured floor. For this reason, the apparatus etc. which can be arrange | positioned under the lower floor board 31 will be restrict | limited significantly.

  Further, in order to widen the storage space in the lower part of the air conditioning unit storage recess 31a, the lower floor plate 31 can be disposed at a high position, or the depth of the air conditioning unit storage recess 31a can be configured to be shallow. However, even if configured in this way, when the lower floor plate 31 is disposed at a high position, the upper floor plate 32 is disposed at a relatively high height. In addition, when the depth of the air conditioning unit storage recess 31a is configured to be shallow, the portion of the air conditioning unit 35 that protrudes from the air conditioning unit storage recess 31a increases, and the upper floor plate 32 further covers the air conditioning unit 35 that protrudes. The configuration is greatly raised upward.

  At this time, in order to configure the height dimension between the upper surface of the upper floor plate 35 and the driver's seat and the height to the ceiling of the cab as a desired height dimension, the height position of the ceiling is configured to be high. I have to keep it. If the height of the ceiling is high, the overall height of the construction machine is high.

  If the vehicle height of the construction machine is configured to be high, when the construction machine is loaded on a truck or the like and transported, it will be caught by the height limit of the vehicle that can be driven by the road traffic law. In addition, when transporting construction machines using ships, etc., they can no longer be stored and transported in normal sized containers, so they can be stored in specially created special containers or special installation methods. It must be used on a ship.

  The present invention does not give a significant height restriction to a lower part of the cab floor, in particular, a device disposed below the center part of the floor, and lowers the cab ceiling height position, so that the work machine An object of the present invention is to provide a cab floor that can be constructed with a low vehicle height.

The object of the present invention can be achieved by the inventions described in claims 1 and 2.
That is, in the present invention, a floor of a cab mounted on a work machine, wherein the floor made of a plate-like body is between a central part in the left-right width direction of the floor and both side parts adjacent to the central part. With a step,
The central portion is a flat portion definitive place the operator's foot seated in the driver's seat, the said two side portions that are configured to lower than the central site, disposed on at least said cab device The most important feature is that it has a space for installing the vehicle or a sufficient space on which an operator can put his / her foot when moving up and down.

  Further, in the present invention, the floor is configured by connecting and fixing a first floor member and a second floor member, and the first floor member bends a plate-like body and the one side portion and the A center portion, and a cross-sectional shape in the left-right width direction of the floor is formed into a shape having a flange extending outward from one end side of a substantially U-shape opened downward, and the second floor member is The main feature is that it is configured as a plate-like body connected and fixed along the edge of the first floor member.

In the present invention, a central portion that is a flat portion in which a step is formed between a central portion in the left-right width direction of the floor and both side portions adjacent to the central portion, and a worker's feet seated in the driver's seat can be placed The height position is configured to be higher than the both side parts. In addition, a predetermined width is provided at both side portions in the left and right width directions, and a sufficient space is provided to allow the operator to put his / her foot when the operator moves up and down. By configuring the floor in this way, it becomes possible to configure the height of the ceiling to be low while configuring the dimensions from the side parts to the height of the cab ceiling as desired dimensions. The vehicle height of the machine can be reduced.

  As the floor configuration, it is configured so that the central part is higher than the both side parts with a step, so it can be configured as an installation space with height as the installation space below the central part it can. For this reason, the floor concerning this invention can be constituted in the upper part of those devices etc., without changing the layout for arranging the devices etc. which were installed with the conventional work machine. And it can comprise so that a desired height dimension may be obtained as a height dimension from the center site | part of a floor to a ceiling.

As described above, in the present invention, the central part configured as a flat part in which the feet of the worker seated on the driver's seat can be placed with the predetermined width on both side parts and with a step is provided on both sides. Make up high . With this configuration , a function as a rib can be provided as a function of the central portion. That is, the floor is a flat part where the operator's feet sitting on the driver's seat can be placed, but the central part can be configured as a rib , so a single flat floor was used. Compared to the case, the strength as a floor can be improved. Accordingly, it is possible to reduce the plate thickness of the plate-like member constituting the floor, thereby reducing the weight of the work machine.

  In addition, because it has a configuration with a predetermined width on both side parts, it is possible to install an air conditioner etc. on one side part, and it is necessary to secure a new installation place for installing the air conditioner etc. There is no. Moreover, the other side part can be comprised as a member which supports a leg | foot when an operator raises / lowers.

Since the floor according to the present invention is constructed by connecting and fixing the first floor member and the second floor member, the floor of the operator sitting on the driver's seat from one plate-like body can be placed flat. It can be configured more easily than a configuration in which the central portion as a region is bent so as to be higher than the regions on both sides, or by drawing. That is, in order to bend the central portion of a single plate-like body so as to be higher than both side portions , a large bending device is required . Moreover, in order to form by drawing, the large-sized press apparatus provided with the expensive metal mold | die is required.

  On the other hand, since the bent portion is formed only on the first floor member, it is not necessary to use a large-sized device as the device for forming the bent portion. Moreover, since the floor is composed of two members, the first floor member and the second floor member, these operations are easy even when the first floor member and the second floor member are transported and assembled. become. Further, even when the first floor member and the second floor member are connected and fixed by welding and fixed as a cab floor, the welding operation can be performed using a welding robot. Can be performed efficiently.

  Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. The configuration of the cab and the floor mounted on the work machine of the present invention are not limited to the configurations described below. In addition to the configurations described below, any configuration that can solve the problems of the present invention can be adopted. For this reason, this invention is not limited to the Example demonstrated below, A various change is possible.

  FIG. 1 is a schematic perspective view of a cab mounted on a work machine according to an embodiment of the present invention. FIG. 2 is a schematic perspective view showing a state of the floor composed of the first floor member and the second floor member before connection and fixing.

  As shown in FIG. 1, the cab 10 is supported and fixed by a pair of left and right A pillars 12 and a pair of left and right B pillars 13 disposed in the center so as to support the ceiling portion 11 from the lower surface side. The pair of left and right A pillars 12 are bent in a substantially L shape from the middle, and the ceiling portion 11 is supported and fixed at the bent ends. A portion of the A pillar 12 that is bent and supports the ceiling 11 is supported and fixed from below by a B pillar 13.

  The right side surface portion of the cab 10 includes a side wall 14 and a window glass. The lift 22 formed between the A pillar 12 and the B pillar 13 in the left side surface portion of the cab 10 can be opened and closed by a door (not shown). A driver's seat 21 is provided in the cab 10, and a floor 15 is provided in the lower front part of the driver's seat 21. Further, the rear portion of the cab 10 is covered with a cover 20. A counterweight (not shown) can be disposed in a lower part of the cover 20.

  As shown in FIG. 2, the floor 15 has a configuration in which a first floor member 16 and a second floor member 17 are welded and fixed with the end edges 16 a and 17 a being overlapped with each other. The first floor member 16 is configured by bending a plate-like body into a shape including one side portion 15b and a central portion 15a on the floor 15. Further, the second floor member is constituted by a plate-like body that constitutes the other side portion 15 c of the floor 15.

  When the floor 15 is disposed in the cab 10, a step is formed between the central portion 15a and the side portions 15b and 15c, and the central portion 15a is disposed above the side portions 15b and 15c. Can be set. A sufficient space for disposing a desired device or the like can be secured below the central portion 15a whose height is increased. The height of the step can be configured as a height that does not interfere with the central portion 15a and a device disposed below the central portion 15a.

Thus, since the side part 15b and the side part 15c can be arranged below the central part 15a, without changing the height from the side part 15b and the side part 15c to the ceiling portion 11 The height of the work machine from the ground to the ceiling portion 11, that is, the vehicle height of the work machine can be reduced.
Although not shown in the illustrated example, the floor 15 may be covered with a stepped mat so that the surface of the mat is in a horizontal floor state.

  In this way, by configuring the floor of the cab 10 with the floor 15 according to the present invention, the vehicle height of the work machine can be reduced. Thereby, even when the work machine is transported by a truck or the like, the work machine can be transported without violating the Road Traffic Law. In addition, when the work machine is transported by ship, the work machine can be housed and transported in a normal size container.

  Further, the periphery of the floor 15 constitutes a lower frame 18 that connects and fixes the lower ends of the A pillars 12, a lower frame (not shown) that connects and fixes the lower ends of the A pillars 12 and B pillars 13, and a driver seat 21. It is configured to be welded and fixed between the pedestal 23 and the like.

  With this configuration, when the floor 15 is fixed by welding, the welded area between the floor 15 and the first floor member 16 and the second floor member is easily accessible by the welding rod and moves the welding rod along the welding line. Easy arrangement. For this reason, a welding operation can be automatically performed using a welding robot. Instead of welding and fixing the periphery of the floor, it can be fixed by fixing means such as bolts.

  Also, as shown in FIGS. 1 and 2, the floor 15 can be provided with ribs by the central portion 15a of the first floor member 16, so that the strength of the floor 15 can be greatly improved. it can. Thereby, even if it comprises thin plate | board thickness which comprises the 1st floor member 16 and the 2nd floor member 17, compared with the case where a floor is comprised with a flat plate material, it is comprised with a flat plate material. It can have the same strength as the floor. Accordingly, since the weight of the floor 15 can be reduced, the weight of the work machine can be reduced.

  Moreover, since the double floor board structure is not used as in the above-described prior art, the weight of the floor 15 can be greatly reduced, and the lower space of the floor 15 can be used effectively.

  The present invention can apply the technical idea of the present invention to an apparatus or the like to which the technical idea of the present invention can be applied.

It is a schematic perspective view of the cab mounted in a working machine. (Example) It is a general | schematic perspective view of a floor. (Example) It is a perspective view which shows the principal part of a floor. (Conventional example)

Explanation of symbols

10 ... cab,
15 ... Floor,
15a ... central part,
15b, 15c ... side part,
16 ... 1st floor member,
17 ... second floor member,
18 ... Lower frame,
23 ... pedestal,
31 ... lower floor board,
31a ... Air conditioning unit housing recess,
32 ... upper floor board,
35 ... Air conditioning unit.

Claims (2)

A cab floor mounted on a work machine,
The floor made of a plate-like body is configured to have a step between a central portion in the left-right width direction of the floor and both side portions adjacent to the central portion,
The central part is a flat part where the operator's feet seated in the driver's seat can be placed,
Wherein both side portions configured to lower than the central site, to become equipped with enough space to put the foot when space or the operator installing the unit be disposed at least within the cab to lift The characteristic cab floor. The floor is configured by connecting and fixing the first floor member and the second floor member,
The first floor member is provided with the one side part and the central part by bending a plate-like body, and the cross-sectional shape in the left-right width direction of the floor is opened from one end side of a substantially U-shape. Consists of a shape with a flange extending outward,
The cab floor according to claim 1, wherein the second floor member is configured as a plate-like body connected and fixed along an edge of the first floor member.

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