JPH0674659U - Cabin for construction machinery - Google Patents

Abstract

(57) [Summary] [Purpose] To secure a good visual field continuously from the front to the upper part, and to widen the visible range to the upper part. An opening 22G of a cabin frame 22 is opened from a front frame 22A to a ceiling plate 22E, and a windshield 26 is provided with a first surface portion 26A and a first surface portion 26A.
A composite curved glass is formed from a second surface portion 26B that is curved with a radius of curvature that is smaller than the radius of curvature of the first surface portion on the upper end side of A, and the tip end side of the second surface portion 26B is the ceiling plate 2
It is configured to extend around the 2E side and be attached to the opening 22G. Therefore, for the operator M, the windshield 26 ensures a good field of view that continuously extends from the front side to the upper side, and the upward visible range at the time of work is widened.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a construction machine cabin suitable for use in construction machines such as hydraulic excavators and hydraulic cranes.

[0002]

[Prior art]

 6 to 9 will be described with reference to an example in which a conventional construction machine cabin is used for a hydraulic excavator.

In the figure, 1 is a lower traveling structure, 2 is an upper revolving structure provided on the lower traveling structure 1 so as to be rotatable, and the upper revolving structure 2 is provided with a lower traveling structure 1 through a revolving device 3. A main body frame 4 rotatably provided on the upper side, a machine room 5 provided on the main body frame 4 and accommodating an engine, a hydraulic pump (neither is shown), and the like. The counter weight 6 is provided on the side of the main body frame 4 and is provided at the rear portion of the main body frame 4, and a cabin 8 described later is provided at the front left portion of the main body frame 4. At the center of the front part of the main body frame 4, a working device 7 for excavating earth and sand is provided so that it can be lifted and lowered.

Reference numeral 8 denotes a cabin which is located on the front left side of the machine room 5 and is provided on the main body frame 4, 9 denotes a cabin frame as a cabin main body which forms an outer shell of the cabin 8, and the cabin frame 9 is As shown in FIGS. 7 and 8, front frame 9A as front and rear side plates, rear plate 9B, side plates 9C and 9D as left and right side plate parts, ceiling plate 9E as a ceiling part, and bottom plate (see FIG. A box shape is formed (not shown), and a door 9F for the operator M to enter and exit the cabin 8 is attached to the left side plate 9C of the side plates 9C and 9D so that the door 9F can be opened and closed. Further, the front frame 9A is bent in a V shape so as to project toward the front, and a rectangular opening 9G to which a below-described front window 11 is attached is formed on the inner edge side thereof.

Reference numeral 10 denotes a pair of guide grooves (only one of which is shown) provided on the inner surfaces of the side plates 9C and 9D of the cabin frame 9 so as to face each other. 9A, a front guide portion 10A that extends upward and downward, and an upper guide portion 10B that extends horizontally from the upper end of the front guide portion 10A along the ceiling plate 9E to form a generally V shape. The guide grooves 10 guide the guide rollers 11C of the front window 11.

Reference numeral 11 denotes a front window located at the front frame 9A of the cabin frame 9 so as to openably close the opening 9G, and the front window 11 is the same as the front frame 9A. The window frame 11A formed in a rectangular shape and the windshield 11B attached to the window frame 11A are generally configured. Further, guide rollers 11C and 11C (only two of which are shown) which are fitted in the respective guide grooves 10 and are guided and moved by the respective guide grooves 10 are rotatably attached to the corners of the window frame 11A. As a result, by moving the guide rollers 11C upward along the guide grooves 10, the front window 11 is stored on the lower surface side of the ceiling plate 9E and opens the window. There is. Further, as shown in FIG. 9, the windshield 11B is composed of a large single plate so that the operator M can secure a good frontal field of view, and its shape is for the purpose of improving rigidity, etc. Is formed as a curved surface glass curved so as to project outward with a radius of curvature r.

Reference numeral 12 denotes a driver's seat for the operator M disposed in the cabin frame 9, reference numeral 13 denotes an operating device provided adjacent to the driver's seat 12, and the operating device 13 is an operating lever. By operating 13A or a pedal (not shown), the working device 7 is operated or the lower traveling body 1 is caused to travel.

The hydraulic excavator according to the related art has the above-described configuration, and the operator M who gets in the cabin 8 through the door 9F operates the operation lever 13A and the like while looking forward through the windshield 11B. As a result, the working device 7 or the like is operated to excavate earth and sand or the like, or the lower traveling body 1 is caused to travel.

[0009]

[Problems to be solved by the device]

 By the way, according to the above-mentioned conventional technique, by forming the front glass 11B of the front window 11 from a large single plate, it is possible to secure a good front view for the operator M. However, since the windshield 11B is set so as to fit inside the front frame 9A, when the operator M is in the normal sitting posture in the driver's seat 12, only the position shown by the alternate long and short dash line in FIG. You can't get an upper view. For this reason, when excavating a high place with the work device 7, the operator M must operate the operation device 13 while keeping his face close to the windshield 11B and watching the work device 7. There is a problem in that not only will the operation be carried out at the same time, the work efficiency will drop significantly, but also operation mistakes will easily occur and the safety and reliability will drop significantly.

Therefore, as a countermeasure against the above problem, it is conceivable to incline the windshield 11B toward the operator M side to secure the upper field of view, but in this case, the habitability in the cabin 8 is deteriorated and When the windshield 11B comes close to the operator M, the operator M is given a feeling of pressure, and there is a problem that the degree of fatigue of the operator M increases.

As another countermeasure, a method of providing an opening in the ceiling plate 9E that allows an upward view and ensuring an upward view through the opening, and increasing the height of the cabin 8 to make the front glass 11B It is also conceivable to make the vertical so as to make the view longer and to secure an upper view. However, the former countermeasure is that an invisible area is formed between the opening and the windshield 11B, and the existence of this invisible area causes the operator M to be confused to perform an accurate operation. There is a problem that operation mistakes are likely to occur. In the latter measure, the locus of the bucket (not shown) of the working device 7 passes near the ceiling plate 9E when the working device 7 is actuated, so that the working range of the working device 7 must be reduced. There is a problem in that the height of the cabin 8 cannot be increased in terms of safety.

The present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to ensure a good visual field continuously from the front to the upper side, and to widen the visible range and improve workability. An object of the present invention is to provide a cabin for a construction machine.

[0013]

[Means for Solving the Problems]

 The configuration adopted by the present invention to solve the above-mentioned problems is provided in a position on the construction machine main body, and the front and rear side plates, the left and right side plates, and the ceiling form a box shape. A cabin main body having an opening formed from the front side plate to the ceiling, a windshield provided at the opening of the cabin main body, and a driver's seat provided inside the cabin main body, The windshield is formed with a first surface portion having at least a first radius of curvature and a second radius of curvature located on the upper end side of the first surface portion and smaller than the first radius of curvature. And a second surface portion extending so as to wrap around the ceiling portion side of the cabin body.

Further, the first surface portion of the windshield may be a flat surface by making the first radius of curvature infinite.

Further, the first surface portion of the windshield may be a curved surface by making the first radius of curvature finite.

Further, it is preferable that the windshield is movably provided between the left and right side plate portions of the cabin body from the front side plate portion to the ceiling portion, and the windshield can be stored on the ceiling portion side.

[0017]

[Action]

 Since the windshield extends so as to wrap around the upper end side of the second surface portion to the ceiling side, it is possible to obtain an upward view at the upper end side of the second surface portion and from the front side without giving the operator a feeling of pressure. A wide and continuous upward field of view is secured.

[0018]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. In the embodiment, the same components as those of the prior art shown in FIGS. 6 to 9 described above are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, reference numeral 21 denotes a cabin provided on the body frame 4 according to the present embodiment, 22 denotes a cabin frame serving as a cabin body forming an outer shell of the cabin 21, and the cabin frame 22 is shown in FIG. As is also shown, the front frame 22A as the front and rear side plate portions, the rear plate 22B, the side plates 22C and 22D as the left and right side plate portions, and the ceiling portion as in the cabin frame 9 described in the prior art. A ceiling plate 22E and a bottom plate (not shown) are formed in a box shape, and a door 22F is attached to the left side plate 22C so that the door 22F can be opened and closed. However, the opening 22G formed on the inner edge side of the front frame 22A has a large opening in the up and down direction from the front frame 22A to the front side of the ceiling plate 22E.

Reference numeral 23 denotes a pair of guide grooves (only one of which is shown) provided on the inner surfaces of the side plates 22C and 22D of the cabin frame 22 so as to face each other, and each of the guide grooves 23 has a front frame 22A. Is formed in a substantially V shape from a front guide portion 23A extending upward and downward along the upper guide portion 23B extending horizontally from the upper end of the front guide portion 23A along the ceiling plate 22E. The tip of the upper guide portion 23B is an arc-shaped guide portion 23C that follows the curvature of a second surface portion 26B of the windshield 26, which will be described later.

Reference numeral 24 denotes a front window located on the front frame 22A of the cabin frame 22 and attached to the opening 22G, and 25 denotes a window frame that constitutes the front window 24 together with the windshield 26. Are formed with a predetermined curvature along an opening 22G formed from the front frame 22A to the ceiling plate 22E. Further, guide rollers 25A, 25A (only two of which are shown) which are fitted in the respective guide grooves 23 at respective corners of the window frame 25 and are guided and moved by the respective guide grooves 23 are freely rotatable. Installed on.

Reference numeral 26 denotes a windshield mounted on the window frame 25. As shown in FIG. 3, the front glass 26 has a curvature radius R1 as in most of the front glass 11B described in the prior art. Although the first surface portion 26A is curved so as to project to the outside, the upper surface of the first surface portion 26A is curved with a radius of curvature R2 smaller than the curvature radius R1 of the first surface portion, and the ceiling. The 2nd surface part 26B extended so that it may go around to the board 22E side is integrally formed. As a result, the front glass 26 is configured as a composite curved glass having two types of radii of curvature R1 and R2.

The front window 24 thus configured is stored on the lower surface side of the ceiling plate 22E as shown in FIG. 4 by moving the guide rollers 25A upward along the guide grooves 23. It is designed to open windows.

The hydraulic excavator according to the present embodiment has the above-mentioned configuration, and its basic operation is not particularly different from that according to the prior art.

However, in the present embodiment, the opening 22G of the cabin frame 22 is made to open largely from the front frame 22A to the front side of the ceiling plate 22E, and the windshield 26 of the front window 24 is curved with a radius of curvature R1. The first surface portion 26A and the second surface portion 26B that is curved at the upper end side of the first surface portion 26A with a radius of curvature R2 that is smaller than the radius of curvature R1 of the first surface portion are formed as a composite curved glass, and the second surface The tip end side of the portion 26B is extended so as to wrap around the ceiling plate 22E side and is attached to the opening portion 22G. Therefore, as shown by the alternate long and short dash line in FIG. 2, even when the front window 24 is closed, the windshield 26 is brought closer to the operator M to give a feeling of pressure, and the height of the cabin 21 is increased. Without doing so, it is possible to secure a good field of view that the operator M continuously expands from the front to the upper side.

Thus, according to this embodiment, the operator M can be ensured that the field of view that continuously extends from the front side to the upper side can be secured. It is possible to operate the work device 7 in a normal sitting posture without operating in an unreasonable posture brought close to the glass 26, which can improve the operability and greatly improve the work efficiency, and cause an operation error. Can be effectively prevented, and safety and reliability can be greatly improved.

Moreover, the front window 24 can be stored and opened on the lower surface side of the ceiling plate 22E by moving the guide rollers 25A upward along the guide grooves 23, as shown in FIG. As a result, it is possible to secure a larger forward field of view and improve workability in summer and the like.

In the above-described embodiment, the case where the windshield 26 is formed as a compound curved glass from the first surface portion 26A curved with the radius of curvature R1 and the second surface portion 26B curved with the radius of curvature R2 is described as an example. However, the present invention is not limited to this, and as in the modification shown in FIG. 5, the radius of curvature R3 of the first surface portion 27A of the windshield 27 is made infinite, and the first surface portion 27A is made a flat surface, and the first surface portion 27A is made flat. A second surface portion 27B having a radius of curvature R2 may be integrally provided on the upper end side of 27A.

In addition, in the above-described embodiment, the cabin 21 in which the front window 24 can be stored on the ceiling plate 22E side of the cabin frame 22 along each guide groove 23 has been described as an example. Alternatively, the windshield may be applied to a cabin in which an opening of the cabin frame cannot be opened.

Further, in the above-described embodiment, the cabin 21 of the hydraulic excavator has been described as an example of the cabin for the construction machine, but the present invention is not limited to this, and for example, the cabin 21 of another construction machine such as a cabin of a hydraulic crane. Widely applicable to cabins.

[0031]

[Effect of device]

 As described above in detail, according to the present invention, an opening is formed from the front plate portion of the cabin body to the ceiling portion, and the first surface portion is formed in the opening portion with at least a first radius of curvature, A windshield located on the upper end side of the first surface portion and having a second radius of curvature smaller than the first radius of curvature is provided, and the upper end portion of the second surface portion of the windshield is the ceiling portion of the cabin body. Since it is configured to wrap around to the side, the upper and lower dimensions of the windshield can be extended without increasing the height of the cabin body, and the operator can feel the pressure from the front without increasing the feeling of pressure. It is possible to secure a continuous wide upper field of view over the entire range, effectively improve the working conditions of the operator, and improve working efficiency and safety.

[Brief description of drawings]

FIG. 1 is an external perspective view showing a cabin according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of the cabin shown in FIG.

FIG. 3 is an enlarged vertical sectional view showing the shape of the windshield in FIG.

FIG. 4 is an external perspective view of the same position as FIG. 1, showing a state in which a front window is opened and stored on the ceiling side.

FIG. 5 is an enlarged vertical sectional view showing a shape of a windshield according to a modification.

FIG. 6 is a side view showing a conventional hydraulic excavator.

FIG. 7 is an external perspective view showing the cabin in FIG. 6 in an enlarged manner.

8 is a vertical cross-sectional view of the cabin shown in FIG.

9 is an enlarged vertical sectional view showing the shape of the windshield in FIG. 7. FIG.

[Explanation of symbols]

 12 Driver's seat 21 Cabin 22 Cabin frame (cabin body) 22A Front frame (front side plate part) 22B Rear plate (rear side plate part) 22C, 22D Left and right side plates (left and right side plate parts) 22E Ceiling plate (ceiling part) ) 22G opening 26,27 windshield 26A, 27A first surface 26B, 27B second surface R1, R3 radius of curvature (first radius of curvature) R2 radius of curvature (second radius of curvature)

Claims (4)

[Scope of utility model registration request] 1. A construction machine is provided on the main body,
A cabin main body having a box shape formed of front and rear side plate parts, left and right side plate parts and a ceiling part, and an opening formed from the front side plate part to the ceiling part, and a cabin main body provided with the opening part. A windshield and a driver's seat provided in the cabin body, the windshield having a first surface portion formed with at least a first radius of curvature;
The second surface portion is formed on the upper end side of the surface portion and has a second radius of curvature smaller than the first radius of curvature, and the upper end portion extends to wrap around the ceiling side of the cabin body. Cabin for construction machinery. 2. The first surface portion of the windshield is the first surface portion.
The cabin for a construction machine according to claim 1, wherein the cabin has a flat surface by making the radius of curvature of the infinite. 3. The first surface portion of the windshield is a first surface portion.
The construction machine cabin according to claim 1, wherein the cabin has a curved surface by having a finite radius of curvature. 4. The windshield is movably provided between the left and right side plate portions of the cabin body from the front side plate portion to the ceiling portion, and the windshield can be stored on the ceiling portion side. Alternatively, the cabin for construction machinery according to item 3.