JP2007162248A - Drain apparatus for operating fluid tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drain apparatus enabling a worker to perform drain work in an easiest position to work, thereby making work extremely easy. <P>SOLUTION: A hose 4 is connected to a drain hole 2 formed at the bottom face of an operating fluid tank 1. The tip side of the hose 4 is made a free end, and the tip is provided with an opening/closing mechanism 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a drain device applied to a hydraulic oil tank of a work machine.

A drain device is provided on the bottom surface of the working oil tank of the work machine in order to discharge the working oil. An access hole is provided in the frame below the drain device, and a remote drain device is arranged depending on the form. The drain device is accessed from the access hole, and the hydraulic oil is discharged from the tank by releasing the cock or removing the plug.
JP 2000-274401 (FIG. 1)

  However, in order to perform the drain work, the worker has to go under the vehicle and move to the bottom of the hydraulic oil tank and then perform it in a cramped place, which is difficult and complicated. In particular, along with the recent downsizing of the airframe, an aspect in which equipment such as a cylinder is arranged under the hydraulic oil tank is increased, and in such an aspect, it is difficult to access the drain device.

  Further, depending on the turning state of the work machine, the drain device may be positioned on the crawler. In such a case, it is necessary to perform a turning work and return the drain device to an appropriate position before the discharging work, which increases the number of work steps and is more complicated.

  The present invention was devised in view of the above-described problems of the prior art, and is intended to provide a drain device that allows a worker to perform a drain operation at a position where the worker can work most easily, and thereby can perform the operation very easily. Is.

  As a structure for facilitating drain work, there is a structure disclosed in Japanese Patent Application Laid-Open No. 2000-274401. As shown in FIG. 3, the drain work of the plurality of hydraulic devices 10 to 13 is facilitated by performing the work at one place. However, when attention is paid only to the hydraulic oil tank 10, A drain hose 15 is connected to the drain hole 14 and its tip is connected to a manifold 16 provided at the end of the vehicle body. With this structure, even if the hydraulic oil tank 10 is located at the center of the vehicle body, drain work can be performed at the end of the vehicle body, and depending on the turning position of the vehicle body, work can be performed without the operator entering below. It becomes. However, even with this structure, it is necessary to turn the vehicle body (particularly, the manifold 16 is positioned above the crawler in the structure shown in the figure). turn into. Above all, the drain work cannot be performed in a place where the worker can work most easily.

  The inventors of the present invention have come up with the present invention as a result of further study after considering these problems of JP-A-2000-274401. That is, the drain device for the hydraulic oil tank according to the present invention has a hose connected to the drain hole formed in the bottom surface of the hydraulic oil tank, the tip end side of the hose is a free end, and an opening / closing mechanism is provided at the tip portion. It was made to be characterized.

  The opening / closing mechanism refers to a mechanism that freely opens and closes the hose port, for example, a cock or a plug.

  Since the hose tip side connected to the drain hole is a free end, the operator can pull the hose tip up to an arbitrary position and bring it to the desired position. Drain work can be done. The free end of the hose may be moored at an arbitrary position by a locking mechanism such as a hook outside the drain operation.

  According to this invention, even if the operator does not enter under the vehicle, if the tip of the hose is pulled to an arbitrary position, the drain operation can be performed at that location. Even if there is equipment such as a cylinder under the hydraulic oil tank, it can be drained at any position, so there is no problem.

  Of course, even if there is a crawler under the hydraulic oil tank, the drain work can be performed at an arbitrary position, so there is no need to turn the vehicle body.

  As described above, according to the present invention, the drain operation can be performed at the position most suitable for the operator. For this reason, the drain operation can be performed very easily as compared with the conventional case.

  Specific embodiments of the invention according to the present application will be described with reference to the drawings. FIG. 1 is an explanatory diagram when the working machine is viewed from the rear, and FIG. 2 is an explanatory diagram when the working machine is viewed from the side. In any of the drawings, for the convenience of explanation, parts other than the hydraulic oil tank 1 are shown by imaginary lines.

  The drain device of this embodiment is as follows. A drain hole 2 is formed on the bottom surface of the tank 1. A plug 3 is connected to the drain hole 2, and a drain hose 4 is connected to the plug 3. A cock 5 is attached to the tip of the drain hose 4, and a locking flange 6 is formed at the base of the cock 5. The cock 5 is a rotary type in which the hose opening is opened by one-way rotation and the hose opening is closed by rotation in the other direction. The hose tip side is a free end, but the frame 7 on the side of the tank 1 is equipped with a hook (not shown) for locking the flange 6 so that the flange 6 can be attached to and detached from the hook. Locked. The frame 7 provided with a hook is a side plate exposed to the outside when the maintenance cover 8 on the side surface of the machine body is opened. Therefore, if the maintenance cover 8 is opened, the end of the drain hose 4 to be locked is exposed, so that it can be removed from the hook and pulled out.

  The drain operation by the drain device of the present embodiment is as follows. An operator stands by the maintenance cover 8 and opens the cover 8. Since the tip of the drain hose 4 is locked in the cover 8, it is removed from the hook, and the hose 4 is pulled out to an arbitrary position most suitable for the drain operation. If the cock 5 at the end of the hose that has been pulled out is opened, the hydraulic oil can be discharged at the optimum position.

  The above operations can be performed at any turning position of the upper turning body. Of course, the same is true even when the crawler 9 is positioned under the hydraulic oil tank.

  Needless to say, the present invention is not limited to the above-described embodiments, and various forms such as the length of the drain hose 4, the location of the hose 4 locking, the locking method, the shape of the tank 1, the position of the drain hole 2, etc. Of course, it is also possible to change.

  The present invention is a technique that can be used for a hydraulic oil tank of a work machine.

It is explanatory drawing of the example which concerns on this invention, and is the figure which looked at the working machine from back. It is explanatory drawing of the example which concerns on this invention, and is the figure which looked at the working machine from the side. It is explanatory drawing of the conventional structure shown by Unexamined-Japanese-Patent No. 2000-274401.

Explanation of symbols

1 tank
2 Drain hole
4 Drain hose
5 cock

Claims (1)

  A drain device for a hydraulic oil tank, characterized in that a hose is connected to a drain hole formed in the bottom surface of the hydraulic oil tank, the distal end side of the hose is a free end, and an opening / closing mechanism is provided at the distal end portion.

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