JP3652226B2 - Swivel work machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a revolving unit that is capable of revolving around a revolving shaft center in a vertical orientation on a traveling device via a bearing body, and is vertically oriented with respect to an opening for getting on and off the side of a cabin provided in the revolving unit. More specifically, the present invention relates to a technique for suppressing the protrusion of a door.
[0002]
[Prior art]
As described above, there are techniques disclosed in Japanese Patent Application Laid-Open No. 8-291538 and techniques disclosed in Japanese Patent Application Laid-Open No. 11-100844 as techniques for suppressing the extension of the door to the outside of the cabin. Among these conventional technologies, the former slides a door (a door for getting on and off) curved along the side surface shape of the cabin with respect to the opening formed on the side surface of the cabin (cab) in the front-rear direction along the outer surface of the cabin. It is configured to be able to open and open the door while preventing the door from protruding outwardly by slidingly moving the door rearward. Further, in the latter of the conventional techniques, the first door panel and the second door panel are slidably connected to each other, and each is energized by a gas damper. And, the second door panel is set to a swinging posture in a posture along the outer surface of the cabin to reduce the amount of protrusion of the door from the outer surface of the cabin.
[0003]
[Problems to be solved by the invention]
Here, taking a swivel work machine called a small swivel type backhoe as an example, this swivel work machine has a rear end of the swivel body that is outside the width of the left and right crawlers even when the swivel body is swung. Designed not to overhang. Therefore, even if this type of swivel work machine enters the back of the alley and performs work, even if the position of the utility pole or part of the house is close to the left and right crawlers, avoid contact with these and the swivel body. It is possible. In addition, in the case of a door provided with a door that opens and closes with respect to the cabin of the swivel body, the design is made on the assumption that the swivel body is swung while the door is set in the closed position. When opened (hereinafter referred to as a fully open posture), the rear end of the door protrudes rearward from the swivel body. When the swivel body is swung in this state, the end of the door is placed on the pole or eaves. It led to inconvenience of contact.
[0004]
Therefore, by configuring the door as in the two conventional examples described above, the inconvenience that the swinging end portion of the door in the open posture (the cabin front end portion in the closed posture) protrudes to the rear end side of the revolving structure is eliminated. Is also possible. However, any of most prior art the number of components, structures likely lead to increased costs because it is complicated and there is room for improvement in any of the conventional example both easily lead to many malfunction member you working surface .
[0005]
An object of the present invention is to rationally configure a swing working machine in which the swinging end of the door does not protrude from the rear end of the swing body when the door is set to the fully open posture.
[0006]
[Means for Solving the Problems]
The features, actions and effects of the turning work machine according to claim 1 of the present invention are as follows.
〔Characteristic〕
A swinging body is provided on the traveling device via a bearing body so as to be able to turn around a turning shaft core in a vertical orientation, and an opening / closing shaft in a vertical orientation with respect to an opening for getting on and off the side of a cabin provided in the turning body In a turning work machine equipped with a door that can swing open and close around the core,
The opening / closing axis is disposed on the cabin rear side in the opening and at a position corresponding to the outside of the location where the door in the closed position exists, on the cabin front side from the rear end position of the door in the closed position ,
The door opening operation mode is set to swing the door about the opening / closing axis by pulling the front end side of the door in the closed posture to the outside of the cabin ,
The door that is rocked open around the opening / closing axis is configured to be positioned in the swivel region of the swivel body in a fully open posture in which the front end side in the closed posture is directed toward the rear of the cabin. .
[0007]
[Action / Effect]
According to the above feature, since the opening / closing axis is disposed in front of the rear end of the door in the closed position, the opening / closing axis is disposed at the rear end position of the door in the closed position or behind the rear end position. In comparison with the above, the swinging end of the door when the door is operated to the fully open position (the front end position of the door in the closed position) can be displaced forward. Further, according to this feature, since the door has a simple support structure that swings and opens around the opening / closing axis, it is not necessary to employ a complicated structure as mentioned in the prior art. As a result, a turning work machine that does not easily cause a failure, does not increase cost in the future, and that can prevent the problem that the door protrudes rearward from the rear end of the turning body is rationally configured.
[0008]
[0009]
Further , according to the above feature, even when the door is set to the fully open posture, the front end of the door is located in the turning area of the swinging body. Do not let the door come into contact with the utility pole or part of the house. As a result, even when the work is performed with the door set to the fully open posture, the door can smoothly be turned without damaging the door or the utility pole.
[0010]
The features, actions and effects of the turning work machine according to claim 2 of the present invention are as follows.
〔Characteristic〕
2. The swing working machine according to claim 1 , wherein a hinge is formed of a hinge connected to the opening, a hinge connected to the door, and a shaft body that connects each hinge so as to be swingable around the opening / closing axis. In addition, the position of the shaft body is located on the front side of the cabin from the rear end position of the door by bending the hinges.
[0011]
[Action / Effect]
According to the above features, the improvement of the degree of folding the hinges that make up the hinge not only makes it possible to position the door opening / closing axis in front of the rear end of the door, but also almost eliminates the cabin and door. It became unnecessary to improve. As a result, the production is simple and the cost can be further reduced.
[0012]
The features, actions and effects of the turning work machine according to claim 3 of the present invention are as follows.
〔Characteristic〕
The turning work machine according to claim 1 or 2 , wherein when the door is set to a fully open posture, a recess that allows a part of the door to enter the turning body that is positioned to face the door is formed. There is a point.
[0013]
[Action / Effect]
According to the above characteristics, when setting the door to the fully open posture, it becomes possible to set a part of the door into the recess of the swivel body and set the door to a posture along the swivel body. Thus, the door can be greatly swung open. As a result, the inconvenience of the door protruding from the cabin is suppressed.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, a backhoe 1 as a turning work machine includes a traveling device 2, a turning body 3, and an excavating device 4. In the backhoe 1, the traveling direction (left-right direction in FIG. 1) is referred to as the front-rear direction, and the lateral direction (direction orthogonal to the paper surface in FIG. 1) orthogonal thereto is referred to as the left-right direction.
[0015]
The traveling device 2 includes left and right crawler traveling bodies 5 made of rubber crawler belts, a traveling motor M that drives the left and right crawler traveling bodies 5, and the front of the left and right crawler traveling bodies 5. At the position, a dozer 6 is provided so that it can be raised and lowered with respect to the track frame 2A of the crawler traveling body 5.
[0016]
The revolving unit 3 is capable of swiveling around a revolving axis X of the bearing body 7 with respect to a bearing body (slewing bearing) 7 provided on the track frame 2A at the center position of the left and right crawler traveling bodies 5 of the traveling device 2. A slewing frame 8 supported, a bonnet 9 covering various devices (engine, radiator, tank) and the like mounted on the slewing frame 8, a seat 10 provided on the bonnet 9, and a control unit 10A in the vicinity thereof. And a cabin 12 that covers the vehicle.
[0017]
The bonnet 9 includes a fixed bonnet 9A, a rear bonnet 9B supported at the rear end of the fixed bonnet 9A via a hinge so as to be opened and closed, and a fully open side portion that covers the tank and the battery on the right side of the cabin 12. The seat 10 is substantially supported by the fixed bonnet 9A.
[0018]
The swivel frame 8 is configured by covering the outer periphery of a base plate 13 on which an attachment bracket for attaching various devices on an upper surface is covered with a cover member 14 made of FRP or steel plate. A counterweight 15 is provided on the base plate 13 located at the rear portion of the swivel frame 8 so as to balance the weight with the excavator 4 provided at the front end of the swivel frame 8. The revolving frame 8 is configured to be rotatable around the revolving axis X by a revolving motor (not shown) provided on the base plate 13.
[0019]
When the revolving unit 3 is revolved around the revolving axis X, the rear edge 3A of the revolving unit 3 is within the width between the lateral outer ends of the left and right crawler traveling units 5. The rear edge portion 3A is formed in an arc shape centering on the pivot axis X in plan view so that the rear edge portion 3A fits, and the right edge portion 3B and the left edge portion 3C of the pivot body 3 (the pivot frame 8) are formed. It is shaped in a straight line that assumes the front-rear posture in plan view. That is, this backhoe is called a rear small turning type, and the arcuate turning trajectory drawn by the rear edge portion 3A of the turning body 3 when the turning body 3 turns is the lateral outer end of the left and right crawler traveling bodies 5. It is configured to fit within the width between each other.
[0020]
As shown in FIGS. 1 and 2, a pair of upper and lower pivot members 16 that support the excavator 4 are provided on the front side of the revolving frame 8 so as to protrude forward. A swing bracket 17 is pivotally supported on the pivot member 16 via a longitudinal support shaft so that the swing bracket 17 can swing in the left-right direction. The swing bracket 17 is swung by a swing cylinder 17A provided inside the swing frame 8. Driven.
[0021]
The excavator 4 includes a boom 18 whose base is supported by a swing bracket 17 so as to be swingable around a horizontal posture axis, and an arm 19 that is swingably connected to the tip side of the boom 18 around a horizontal posture axis. The arm 19 is configured to be provided with a bucket 20 connected around a shaft in a lateral posture on the distal end side. The boom 18 is driven to swing by a boom cylinder 21 interposed between the swing bracket 17 and the boom 18, and the arm 19 is swinged by an arm cylinder 22 interposed between the intermediate portion of the boom 18 and the arm 19. The bucket 20 is driven to swing by a bucket cylinder 23 provided between the base of the arm 19 and the attachment link of the bucket 20.
[0022]
As shown in FIGS. 1 and 4, the cabin 12 has left and right front struts 25 erected on the front end of the revolving frame 8, left and right rear struts 26 erected on the upper surface of the fixed bonnet 9A, A cabin frame comprising left and right intermediate struts 27 erected at an intermediate position in the front-rear direction of the frame 8 and an upper end frame (not shown) connecting these upper ends is provided. A top panel 28 is provided on the upper end frame of the cabin frame, a front panel 29 having a windshield 29A is provided between the left and right front columns 25, and a rear panel 30A is provided between the left and right rear columns 26. 30.
[0023]
An opening 31 for an operator to get on and off is formed at the front position of the left side surface of the cabin 12, and a door 32 is provided in the opening 31 so as to be swingable and openable. The opening 31 is formed in a square frame shape by the front strut 25, the intermediate strut 27, the upper end frame of these upper positions, and the lower end frame of these lower positions. A rubber seal member 33 for sealing 32 is provided. Further, the upper and lower positions of the door 32 are provided with door panels having door glasses 32A and 32B.
[0024]
As shown in FIGS. 1, 4, and 5, a hinge 34 is provided on the cabin rear side of the opening 31, and an opening / closing axis of the hinge 34 is disposed on the cabin front side from the rear end position of the door 32. That is, the hinge 34 is connected to the opening 31 by a bolt 34A, the hinge 34B is connected to the rear end of the door 32 by a bolt, and the hinges 34A and 34B are connected to each other so as to be swingable around the opening / closing axis. The shaft body 34C is positioned in front of the rear end position of the door 32 by bending the hinges 34A and 34B.
[0025]
An opening / closing lock device (locking tool) 35 is provided at an intermediate position in the vertical direction on the front end side of the door 32 in the closed position, and a lock member 36 is provided on the outer surface side of the door 32 on the front end side of the door 32 in the closed position. A side panel 37 having a side glass 37A is provided between the intermediate strut 27 and the rear strut 26. When the door 32 is set to a fully open posture along the side panel 37 as indicated by a virtual line in FIG. The side panel 37 is provided with a lock fitting 41 that engages with the member 36 and engages and holds the door 32 in the fully open position. A handrail 38 is provided on the cabin inner surface side of the door 32 as an auxiliary tool for opening and closing.
[0026]
Further, the outer wall surface (left wall surface) on the side where the opening 31 is formed in the cabin 12 is formed so as to be displaced to the inside of the revolving frame 8 by at least the thickness of the door 32. A recess 39 is formed in the revolving frame 8 (the revolving structure 3) to allow contact with the door 32 and allow a part of the door 32 to enter when the fully open posture is set. The recess 39 is formed from the rear position of the revolving frame 8 to the inside of the counterweight 15 and the side of the rear bonnet 9B that continue upward.
[0027]
With this configuration, when opening the door 32 in the closed position, the door 32 swings around the swing axis Y by pulling the front end position of the door 32 in the closed position outward. Thus, the fully open posture is reached, and the lock member 36 engages with the lock fitting 41 to maintain the fully open posture. In this fully open position, the front end position of the door 32 in the closed position reaches the rear of the cabin in such a manner that it enters the recess 39, and the entire door 32 fits inward from the outer edge of the swivel frame 8 in plan view. It has become. As a result, when the door 32 reaches the fully open position, the front end of the door 32 in the closed position does not protrude rearward from the rear edge of the swivel frame 8, and the end of the door 32 has a swivel axis. The door 32 does not come into contact with the utility pole or the like even when it is within the turning area of the turning frame 8 and the turning body 3 is turned around the turning axis X.
[0028]
FIG. 6 shows another embodiment of the cabin 12 and the door 32. The left and right front struts 25, the left and right intermediate struts 27, and the left and right rear struts 26 are arranged on a straight line in the front-rear direction posture. The left side surface of the cabin 12 is formed into a vertical plane, and the front panel 29, the rear panel 30, and the side panel 37 form a quadrangular cabin 12, and the door 32 and the side panel 37 are flush with each other. Located above. According to this configuration, the intermediate strut 27 is located on the cabin inner side as compared with the structure shown in FIG. 4, so that the interior space of the cabin 12 is reduced, but the door 32 and the front panel 29, the rear panel 30 and the side panel 37 can be simplified, which is advantageous in terms of manufacturing costs.
[0029]
As shown in FIGS. 2 and 3, it is desirable to provide a skylight 28A, preferably a sunroof-type skylight 28A that can be opened and closed, at a position where it can be seen through from the seat 10. An apparatus can be provided, and a handrail 40 for getting on and off is provided on the outer surface of the front column 25 on the door side.
[Brief description of the drawings]
[Fig. 1] Side view of backhoe [Fig.2] Rear view of backhoe [Fig.3] Plan view of backhoe [Fig.4] Plan view showing door opening and closing structure [Fig.5] Cross section of hinge [Fig.6] Plan view showing different opening and closing structures 【Explanation of symbols】
DESCRIPTION OF SYMBOLS 2 Traveling apparatus 3 Revolving body 7 Bearing body 12 Cabin 31 Opening part 32 Door 34 Hinge 34A, 34B Hinge 34C Shaft body 39 Recessed part X Swing shaft core Y Opening / closing shaft core

Claims (3)

A swinging body is provided on the traveling device via a bearing body so as to be able to turn around a turning shaft core in a vertical orientation, and an opening / closing shaft in a vertical orientation with respect to an opening for getting on and off the side of a cabin provided in the turning body A swivel work machine equipped with a door that can swing open and close around the core,
The opening / closing axis is disposed on the cabin rear side in the opening and at a position corresponding to the outside of the location where the door in the closed position exists, on the cabin front side from the rear end position of the door in the closed position ,
The door opening operation mode is set to swing the door about the opening / closing axis by pulling the front end side of the door in the closed posture to the outside of the cabin ,
A swing work machine configured such that the door that is opened and swung around the opening / closing axis is positioned in the swivel region of the swivel body in a fully open posture in which the front end side in the closed posture is directed toward the rear of the cabin. . The hinge includes a hinge that is connected to the opening, a hinge that is connected to the door, and a shaft that connects the hinges to each other so as to be swingable around the opening / closing axis, and each hinge is bent. The turning work machine according to claim 1 , wherein the position of the shaft body is positioned in front of the cabin from the rear end position of the door. 3. A swivel working machine according to claim 1 or 2, wherein when the door is set to a fully open posture, a recess is formed that allows a part of the door to enter the swivel body that is positioned opposite the door. .

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