JPH0573050U - Excavator with protective roof - Google Patents

Abstract

(57) [Summary] [Purpose] When passing under obstacles such as beams, the protective roof can be easily switched to a position that does not interfere,
Provide an excavator with a protective roof that can be easily switched back to its original state after passing. [Configuration] Operator's protective roof 2 above the driver's seat 1
In the excavator with a protective roof, the protective roof 2 is configured to be switchable between a use state above the driver's seat 1 and a non-use state below the driver's seat 1, and the protection roof 2 is changed over. The operation tool 7 of the drive unit 5 is installed in the driver seat 1
It is characterized by being installed nearby.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an excavator with a protective roof, such as a small backhoe or a bulldozer, provided with a protective roof for the operator above the driver's seat.

[0002]

[Prior Art]

 In general, excavators with a protective roof generally do not have the protective roof removed for safety reasons. However, for example, in the excavation work on the basement floor by the open cut method or the excavation work on the basement floor by the upside down construction method, depending on the height from the excavation surface to the cut-off beam for retaining the earth or the beam of the underground structure, protection that runs on the excavation surface may be performed. When the covered excavator moved horizontally under the beam, the protective roof was sometimes obstructive and needed to be removed.

In such a case, conventionally, the protective roof was once removed from the excavator, and when the vehicle passed under the beam, the protective roof was attached again. Since it is very troublesome to attach and detach the protective roof each time it passes, excavation work is often performed with the protective roof removed, which was a safety management problem.

[0004]

[Problems to be solved by the device]

 The present invention has been made in view of the above situation, and an object thereof is to easily switch the protective roof to a position that does not disturb when passing under an obstacle such as a crossbeam. The objective is to provide an excavator with a protective roof that can be switched to its original state after passing.

[0005]

[Means for Solving the Problems]

 To achieve the above object, the technical means taken by the present invention are as follows. That is, the feature of the present invention is that in an excavator with a protective roof having an operator's protective roof above the driver's seat, the protective roof is in a use state above the driver's seat and a non-use state below it. It is configured so that it can be switched to the state, and the operation tool of the drive device for switching the protection roof is provided near the driver's seat.

[0006]

[Action]

 According to the above configuration, while the operator is sitting in the driver's seat, the operator can operate the operation tool to switch the protective roof between the use state above the driver's seat and the non-use state below it. it can.

[0007]

【Example】

 1 to 3 show an embodiment of the present invention. In the figure, A is a crawler type backhoe which is an example of an excavator with a protective roof in which a protective roof 2 for an operator is provided above a driver's seat 1. The lower end side of the leg portion 3 of the protective roof 2 is swingably supported by an excavator body 4 via a horizontal support shaft P, and is constituted by a reduction gear motor 5a and a worm gear 5b. Due to the driving force of the driving device 5, the use state is located above the driver's seat 1 as shown by a phantom line in FIG. 1 and the use state in order to avoid the obstacle 6 as shown by a solid line in FIG. It is configured so that it can be switched over to a non-use state located below the state. Further, the operation tool 7 of the switching drive device 5 is provided near the driver's seat 1 so that the operator can operate it while sitting in the driver's seat 1.

Reference numeral 8 shown in FIG. 3 is a lock mechanism for fixing the protective roof 2 in a used state, and includes a lock pin 8b that can be inserted into and removed from the hole 8a, and a biasing force of the spring 8c for the lock pin 8b. It is constituted by a solenoid 8d or the like which is driven in the pull-out direction against. Reference numeral 8e is a switch for detecting whether or not the lock pin 8b is inserted into the hole 8a. The switch 8e detects the insertion of the lock pin 8b, whereby the operation of the switching drive device 5 is restrained. Is configured. Although not shown, the switching drive device 5 may be configured by utilizing a hydraulic thinner.

FIG. 4 shows another embodiment of the present invention. In this embodiment, the leg portion 3 of the protective roof 2 of the bulldozer B, which is an example of an excavator with a protective roof, is configured to be bendable around an intermediate axis 9 parallel to the horizontal support axis P, and the upper half side leg portion 3a. And the protective roof 2 are pivotally connected to each other by a support shaft 10 parallel to the horizontal support shaft P so as to be swingable, and between the protective roof 2 and the upper half side leg portion 3a, and between the upper half side leg portion 3a and the lower side leg portion 3a. It is characterized in that hydraulic cylinder devices 11a and 11b are provided between the semi-leg part 3b and the half leg part 3b, respectively.

According to this embodiment, when the switching drive device 5 is operated to swing the protective roof 2 around the horizontal support shaft P to switch between the use state and the non-use state, the hydraulic cylinder device 11a, By appropriately extending and retracting 11b, the movement path of the tip of the protective roof 2 should not exceed the height of the used state, and the amount of protrusion of the protective roof 2 in the unused state to the rear should be small. You can The other configurations are the same as those in the above-mentioned embodiment, and thus the description thereof is omitted.

[0011]

[Effect of the device]

 The present invention has the above-described configuration, and the operator operates the operating tool while sitting in the driver's seat to operate the protective roof above the driver's seat and in the unused condition. Can be switched over. Therefore, when passing under an obstacle such as a crossbeam, the protective roof can be easily switched to an unobstructed position, and after passing, it can be easily switched to the original state, and the protective roof can be attached and detached. Since it does not require labor and transportation, it can prevent the dangerous situation of excavation work without wearing a protective roof.

[Brief description of drawings]

FIG. 1 is a side view of an excavator with a protective roof showing an embodiment of the present invention.

FIG. 2 is a rear view of the excavating machine.

FIG. 3 is a partially cutaway rear view of a main part.

FIG. 4 is a side view of an excavator with a protective roof according to another embodiment of the present invention.

[Explanation of symbols]

1 ... Driver's seat, 2 ... Protective roof, 5 ... Switching drive device, 7 ...
Operation tool.

Claims (1)

[Scope of utility model registration request] 1. An excavator with a protective roof provided with a protective roof for an operator above the driver's seat, in which the protective roof is placed above the driver's seat and in a non-used state below the driver's seat. An excavator with a protective roof, which is configured to be switchable and in which an operating tool for a switching drive device for the protective roof is provided near a driver's seat.