JPH0223437B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid supply device installed at a place usually called a depot for supplying oil to a tank to be supplied with liquid, such as a tank car used for transporting oil or liquid on a railway. Regarding the loading arm device used.

As is well known, at filling stations that supply liquids such as gasoline, kerosene, and diesel oil to tank cars, liquid supply devices are installed for each type of liquid, and the hatch lids of tank cars parked at the filling position are removed and the A loading arm is inserted into the liquid supply port to perform liquid supply work.

In order to prevent the liquid from coming into contact with the supplied liquid tank and generating static electricity during liquid supply work, a drop pipe is provided at the tip of the loading arm, and the drop pipe extends in the longitudinal direction of the loading arm. It is designed to guide the liquid laterally from its tip. This drop pipe also serves to prevent liquid from scattering.

However, according to the prior art, the work of extending the drop pipe with respect to the loading arm was done manually, and therefore the work of inserting the loading arm into the tank to be supplied was troublesome.

Other conventional technologies include Utility Model Publication No. 57-46320
Japanese Utility Model Publication No. 54-81910 proposes a hoisting device for a nested drop pipe with a loading arm that is manually raised and lowered. However, this technique has the problem of requiring manual lifting and lowering work on the top of the lorry, which has poor footing.

Furthermore, Japanese Utility Model Publication No. 55-27592 proposes a technique in which a drop pipe, which is biased to a raised position by a spring, is lowered by the flow during refueling. However, this technique increases piping resistance and requires a larger pump motor. In addition, at the start of refueling, the drop pipe collides with the bottom surface of the lorry tank due to the flow of liquid, and there is a risk of fire due to sparks generated by the impact, as well as damage to the bottom of the tank and the drop pipe.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a loading arm for a liquid supply device that allows the loading arm to be easily inserted into a supplied liquid tank and that prevents the drop pipe from colliding with other parts during the operation. is to provide.

According to the present invention, a loading arm consisting of first, second and third movable pipes connected via a swivel joint is provided above the liquid supply position, and the loading arm is lowered during liquid supply. In a loading arm device of a liquid supply device that supplies liquid after inserting a drop pipe attached to the tip of the third movable pipe of the loading arm into the liquid tank, the drop pipe is attached to the third movable pipe of the loading arm. An interlocking device is provided, which is telescopically attached to the liquid supply pipe pivotally connected to the movable piping of the drop pipe, and expands and contracts the drop pipe in conjunction with the lifting and lowering of the loading arm. a connecting rod pivotally connected to the movable pipe and having the other end attached to the third movable pipe of the loading arm; a sector gear provided at the swivel joint of the second movable pipe;
a pinion that meshes with the sector gear provided on the third movable pipe; a wire drum rotated by the pinion and wrapped with a wire whose tip is connected to the drop pipe; and the wire provided near the tip of the third movable pipe. It consists of a pulley that guides the

Therefore, when inserting the drop pipe into the hatch of a lorry during liquid supply work, the drop pipe is moved. At that time, the first movable pipe and the second
The movable pipe, the connecting rod, and the arm constitute a so-called four-bar linkage device, and the third movable pipe rotates at an angle larger than the angle at which the second movable pipe rotates with respect to the first movable pipe. It's starting to move.
As the pinion rotates, the pinion rotates the wire drum, so that the drop pipe extends along the liquid supply pipe via the wire. The liquid is then guided from the liquid supply pipe to the drop pipe and discharged.

In this way, the drop pipe expands and contracts relative to the liquid supply pipe, so when the drop pipe is lifted up when liquid is not being supplied, it is short, and when it is lowered during liquid supply, it is elongated, so even if the liquid supply pipe is short, The liquid is guided to the drop pipe during dispensing, which prevents the generation of static electricity and splashes during the initial stage of liquid supply. Also, since the loading arm is short,
It is easy to handle when inserted into the hatch of a lorry, and the efficiency of liquid supply work is improved.

Embodiments of the present invention will be described below with reference to the drawings.

In the embodiment of the present invention shown in FIGS. 1 and 2, a fixed pipe 1 connected to a liquid supply pump (not shown) and extending downward is provided with a first swivel joint 2 that can rotate in a substantially horizontal plane. A first movable pipe 3 is connected thereto. This fixed pipe 1 is fixed to a canopy above the liquid supply position or to a rack on the side of the liquid supply position. The lower end of this first movable pipe 3 is bent substantially by 90 degrees, and is connected to the second movable pipe 5 via a second swivel joint 4.
is connected at one end. The second movable pipe 5 is therefore able to rotate substantially in a vertical plane. The other end of this second movable pipe 5 is also bent substantially 90 degrees and is connected via a third swivel joint 6 to one end of a third movable pipe 7. The movable pipe 7 also has an end curved at 90 degrees so that it can be rotated substantially within a vertical plane. Further, the other end of the third movable pipe 7 is connected via a fourth swivel joint 8 to one end of a liquid supply pipe 9 which can rotate in a substantially vertical plane. is also bent at one end to allow rotation in a substantially vertical plane. A liquid supply port is formed at the other end of the liquid supply pipe 9. A known drop pipe 10 is provided on the outer periphery of this liquid supply pipe 9.
is telescopically attached in the manner described below. The fixed pipe 1, the first to third movable pipes 3, 5, 7 connected thereto, the liquid supply pipe 9, and the drop pipe 10 constitute a loading arm.

Next, an embodiment of an interlocking device that expands and contracts the drop pipe in conjunction with the lifting and lowering of the loading arm will be described with reference to FIGS. 1 and 2.

A first pivot joint 11 such as a pin joint is provided in the middle of the first movable pipe 3, and one end of a connecting rod 12 is pivotally connected to the first pivot joint 11. The other end of 12 is also pivotally connected to an arm 14 fixed near one end of the third movable pipe 7 via a second pivot joint 13 . Therefore, the arm 14 is pivotally connected to the second movable pipe 5 via the third swivel joint 6, so that the first movable pipe 3, the second movable pipe 5, and the connecting rod 12 are connected to each other. The arm 14 constitutes a so-called four-bar linkage device.

Therefore, in FIG. 1, when the second movable pipe 5 is rotated clockwise about the swivel joint 4, the third movable pipe 7 is moved by the four-bar linkage. The third movable pipe 7 rotates counterclockwise in FIG. 1 around the swivel joint 6, and the rotation angle of the third movable pipe 7 is determined by setting the length of each link of the four-bar linkage to a predetermined length. The angle of rotation of the second movable pipe 5 is determined by . And the second movable pipe 5 has the third
A sector gear 15 is fixed to the swivel joint 6, and a pinion 16 is meshed with the sector gear 15. This pinion 16 is the third
A wire drum provided in a case 17 attached to a movable pipe 7 is operated, and a wire 18 is wound around the wire drum. Therefore, when the second movable pipe 5 and the third movable pipe 7 rotate relative to each other, the pinion 16 rotates,
The wire 18 is unwound from the wire drum and is adapted to be wound. This wire 18
extends along the third movable pipe 7, and its tip is connected to the drop pipe 10 through a curved guide portion such as a pulley 19.

When supplying liquid to the tank car R parked below the loading arm during operation, the operator (tank car driver) rotates the second movable pipe 5 and lowers the liquid supply pipe 9. Insert into the hatch opening O of the tank car R.

The state in which the loading arm is moved downward in this manner is shown by dotted lines in FIG. 1, and each component is shown with a dowel.

The second swivel joint 4 is the center of the second swivel joint 4.
When the movable pipe 5 is rotated to the position indicated by 5',
By the operation of the four-bar linkage, the third movable pipe 7 rotates around the third swivel joint 6 by an angle greater than the rotation angle θ of the second movable pipe 5, and moves to position 7'. . Therefore, the liquid supply pipe 9 is moved downward and inserted into the hatch of the tank car R as shown at position 9', but at this time, the second and third movable pipes rotate relative to each other, so that sector gear 15
The pinion 16 rotates relative to the wire 18, and the wire 18 is paid out. For this purpose, the drop pipe 10 is extended relative to the supply pipe 9, and the drop pipe 10 is extended at the position 10'.
I'm coming. Therefore, the liquid discharged from the discharge port of the liquid supply pipe 9 is guided to the drop pipe 10 and is discharged laterally from the tip thereof.

As described above, according to the present invention, the drop pipe is telescopically attached to the liquid supply pipe, and an interlocking device is provided that expands and contracts the drop pipe in conjunction with the lifting and lowering of the loading arm, thereby making the liquid supply pipe and the drop pipe unnecessarily long. Helps prevent static electricity from occurring during the initial stage of liquid supply and from splashing.
Since the length of insertion of the loading arm into the liquid tank of a tank truck or the like can be shortened, handling thereof becomes easier.

[Brief explanation of drawings]

FIG. 1 is a side view of a loading arm embodying the present invention, and FIG. 2 is a plan view thereof. 1...Fixed piping, 2...First swivel joint, 3...First movable pipe, 4...Second swivel joint, 5...Second movable pipe, 6...
Third swivel joint, 7... Third movable pipe, 8... Fourth swivel joint, 9... Liquid supply pipe, 10... Drop pipe, 11... First pivot joint, 12... ...Connection rod, 13...Second pivot joint, 14...Arm, 15...Sector gear, 1
6...Pinion, 17...Case, 18...Wire.

Claims (1)

[Claims] 1. A loading arm consisting of first, second, and third movable pipes connected via a swivel joint is provided above the liquid supply position, and when liquid is supplied, the loading arm is lowered and placed inside the supplied liquid tank. In a loading arm device of a liquid supply device that supplies liquid after inserting a drop pipe attached to the tip of the third movable pipe of the loading arm, the drop pipe is pivotally attached to the third movable pipe of the loading arm. An interlocking device is provided that is telescopically attached to the drop pipe that is attached to the drop pipe and expands and contracts the drop pipe in conjunction with the lifting and lowering of the loading arm, and one end of the interlocking device is pivotally connected to the first movable pipe of the loading arm. and a connecting rod pivotally connected to the arm whose other end was attached to the third movable pipe of the loading arm, a sector gear provided on the swivel joint of the second movable pipe, and a connecting rod provided on the third movable pipe. It is composed of a pinion that meshes with the sector gear, a wire drum that is rotated by the pinion and is wound with a wire whose tip is connected to a drop pipe, and a pulley that guides the wire provided near the tip of the third movable pipe. A loading arm device for a liquid supply device featuring: