JPH0730768Y2 - Piping equipment for work equipment - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) [0001] The present invention relates to a piping device for a working machine, and particularly to piping for a working machine when a working machine having various functions such as a construction machine is mounted on a vehicle body. Regarding the device.

(Prior Art) Conventionally, as shown in FIG. 3, a working machine 2 is mounted in front of a vehicle body 1 of a construction machine or the like, and this working machine 2 (for example, a bucket shown by a solid line in FIG. 3) is installed at a work site. In addition, the work machine 3 has been replaced or added with an additional function (for example, a general purpose bucket shown by a broken line in FIG. 3). For this reason, a spare piping device equipped with a quick joint (self-sealing coupling), a swivel joint, and the like is attached to the lift frame 9 that moves up and down the working machine in front of the vehicle body in accordance with the function of the general-purpose bucket.

(Problems to be Solved by the Invention) However, according to the above-described conventional piping device for a working machine,
If a normal standard bucket with few additional functions (bucket shown by the solid line in FIG. 3) is installed and hydraulic pressure is not used, a spare piping device such as a quick joint is not used and dust enters the quick joint. Further, when the link for the working machine is moved up and down, the swivel joint rotates, and the quick joint is shaken and damaged.

The present invention focuses on the above problems and aims to provide a piping device for a working machine in which dust and the like do not enter and which is positioned even when a link is operated.

(Means for Solving the Problems) In order to achieve the above object, in the first device of the piping device for a working machine according to the present invention, a hose quick coupler mounted on a swivel joint is sealed with a plug stopper to prevent foreign matter from being caught. A quick coupler locking fixture is provided within the turning radius of the hose quick coupler to prevent entry, and in the second invention, a hooking means for the locking fixture is provided on the plug plug.

(Operation) According to the above configuration, when a normal standard bucket with few additional functions is mounted and hydraulic pressure is not used, the quick joint is shaken because it is plugged with the plug and fixed to the bracket with the plug. No damage can be prevented.

(Embodiment) Hereinafter, an embodiment of a piping device of a working machine according to the present invention will be described in detail with reference to the drawings. FIG. 1 shows a detailed view of the piping device of the working machine of the present invention, and FIG. 2 shows a side view of FIG. A lift frame 9 for raising and lowering the working machine 2 and a link 4 are mounted on a vehicle body 1 of a construction machine or the like.
An actuator 5 such as a cylinder (hereinafter, referred to as a cylinder) for operating the working machine 3 to which an additional function is added (for example, a general-purpose bucket that opens and closes a bucket) is switched by a control valve 7 from a pump 6, and a piping device 8 is connected. The hydraulic pressure is supplied via. The piping device 8 comprises a swivel joint 10, a quick joint 20, and a locking device 30, as shown in FIG. A pipe 11 is connected to one end of the swivel joint 10, and a quick joint 20 is connected to the other end. When a general purpose bucket or the like is attached to the quick joint 20, a rubber hose 12 (see FIG. 3) is inserted, and when a normal standard bucket or the like is attached, a locking plug 21 (hereinafter referred to as a plug) is inserted. There is. The plug 21 prevents dust from entering the quick joint 20, and a locking plate 21a integral with the plug 21 is inserted into a restraining plate 22a fixed to the guard 22 to stop the rotation of the joint 20. The guard 22 is fixed to the lift frame 9 together with the swivel joint 10.

Next, the operation of the above structure will be described. When a general purpose bucket or the like is attached, the male joint of the quick joint 20 attached to the tip of the rubber hose 12 is attached to the female plug 20a on the cylinder 5 for opening and closing the general purpose bucket 3 as shown in the dotted line A as shown in FIG. Insert it into
Link. When the general purpose bucket 3 is tilted in order to scoop up and discharge dirt, rocks, etc., the cylinder 5 and the rubber hose 12 are tilted accordingly. The swivel joint 10 rotates due to the tilting of the rubber hose 12, but the quick joint is attached to the guard 22 at an appropriate angle α of points B and C in FIG. 2 so that the rubber hose 12 does not interfere with other members (for example, a bucket). 20 female plugs 20a are in contact.
The guard 22 and the restraining plate 22a fixed to the guard 22 protect the soil, rocks, and the like from colliding with the swivel joint 10, the quick joint 20, and the like.

When a normal standard bucket or the like is attached, the quick joint 20 is rotated to a predetermined position to insert the plug 21 into the female plug 20a through the restraining plate 22a which is partially divided in the vertical direction in the drawing, and is integrated with the plug 21. The locking plate 21a formed and protruding in the vertical direction in the drawing is inserted into the restraint plate 22a to lock the rotation of the quick joint 20. At this time, the female plug 20a of the quick joint 20 may be brought into contact with the point C of the guard 22 in FIG. As a result, the plug 21 prevents dust from entering the quick joint 20, and is locked by the guard 22 to stop the rotation of the quick joint 20.

Although the guard 22 is fixed to the lift frame together with the swivel joint 10 in the above embodiment, they may be fixed independently.

(Effects of the Invention) As described above, according to the present invention, the rotation of the swivel joint is stopped in the piping device of the working machine such as the construction machine, and the quick joint is equipped with the plug that prevents dust and the like from entering. Therefore, dust and the like do not enter, and since the link is fixed to the bracket even when it is operated, it is not shaken and damage can be prevented.

[Brief description of drawings]

FIG. 1 is a detailed view of the piping device of the working machine of the present invention. FIG. 2 is a side view of FIG. Fig. 3 is an overall layout of the piping system for industrial machines. 1 ... Car body, 2, 3 ... Working machine, 5 ... Actuator, 8 ... Piping device, 10 ... Swivel joint, 11 ...
… Piping, 20 …… quick joint, 21 …… locking plug, 22 …… guard,

Claims (2)

[Scope of utility model registration request] 1. A hose quick coupler mounted on a swivel joint is sealed with a plug plug to prevent foreign matter from entering, and a quick coupler locking fixture is provided within the turning radius of the hose quick coupler. Piping device for work equipment. 2. A piping device for a working machine, wherein a hooking means for a locking fixture is provided on a plug stopper.