JP2542447Y2 - Push-pull type cargo handling equipment for cargo handling vehicles - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push-pull type loading and unloading apparatus in which a face plate is provided above and below a fork claw so as to be movable back and forth in a loading and unloading vehicle such as a forklift truck.

[0002]

2. Description of the Related Art As a conventional push-pull type cargo handling device for a cargo handling vehicle, a pair of left and right masts erected at a front portion of a vehicle body are provided with a vertically movable body, and the vertically movable body is provided with rollers on the mast. It comprises a pair of left and right vertical members which move up and down through the upper and lower members, and upper and lower horizontal members which are fixed horizontally across the left and right vertical members. And a link mechanism portion is provided at the front portion of the elevating body so as to be expandable and contractible in the front-rear direction,
The link mechanism section has a pair of left and right guides vertically fixed to a front portion of the elevating body, and a pair of left and right vertical X-shaped rear link portions and a pair of left and right vertical X A front link portion is connected to the front and rear, and a hydraulic cylinder is provided here, and a hydraulic hose for supplying hydraulic oil to the hydraulic cylinder is fixed to the hydraulic cylinder. The hydraulic cylinder causes the rear link portion and the front link portion to expand and contract, a face plate is provided at a front portion of the link mechanism portion, and a grip portion is provided at a lower end of the face plate. I have. Also,
A pair of left and right fork claws are attached to a front portion of the elevating body so as to be positioned below the link mechanism and the face plate.

[0003]

In a conventional push-pull type cargo handling device for a cargo handling vehicle, since a hydraulic hose is fixed to a hydraulic cylinder of a link mechanism, a link is required to retreat a face plate toward a vehicle body. When the mechanical part is contracted, a part of the hydraulic hose is bent at an acute angle, and excessive force is applied to the hydraulic hose, causing cracks, and the hydraulic hose becomes freely bendable in any direction from the fixed part with the hydraulic cylinder. Therefore, there is a possibility that the hydraulic hose may bend into the link mechanism and bite the hydraulic hose into the link mechanism, which may significantly reduce the durability of the hydraulic hose. The purpose of the present invention is to solve these problems.

[0004]

According to the present invention, a mast is erected on a front portion of a vehicle body, an elevating body is provided on the mast so as to be movable up and down, a fork claw is provided on a front portion of the elevating body, and a hydraulic In a push-pull type loading and unloading device for a loading and unloading vehicle, a link mechanism portion that can be extended and contracted in the front-rear direction by a cylinder is provided, a face plate is provided at a front portion of the link mechanism portion, and a grip portion is provided at a lower portion of the face plate. In order to supply pressure oil to the hydraulic cylinder, a hydraulic hose connected to a hydraulic pressure source side and a hydraulic pipe connected to the hydraulic cylinder are connected by a rotary pipe joint that can rotate back and forth.

[0005]

A face plate is provided by connecting a hydraulic hose connected to a hydraulic pressure source side to supply hydraulic oil to the hydraulic cylinder and a hydraulic pipe connected to the hydraulic cylinder by a rotary pipe joint that can rotate back and forth. When the link mechanism is retracted to move backward to the vehicle body side, the rotating pipe joint prevents part of the hydraulic hose from bending at an acute angle, and also prevents the hydraulic hose from bending into the link mechanism. In addition, the hydraulic hose is prevented from being caught in the link mechanism.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a push-pull type cargo handling device for a cargo handling vehicle according to the present invention will be described with reference to FIGS. As a push-pull type loading / unloading device, an elevating body 2 is movably provided on a pair of left and right masts 1 erected at a front portion of a vehicle body, and the elevating bodies 2 are moved up and down on the mast 1 via rollers 3. It comprises a pair of left and right vertical members 4 and upper and lower horizontal members 5 that are fixed horizontally across the left and right vertical members 4. A link mechanism 6 is provided at the front of the elevating body 2 so as to be able to expand and contract in the front-rear direction. The link mechanism 6 is provided at the front of the elevating body 2 with a pair of left and right guides 7, 7, a base end in the longitudinal direction is pivotally attached to the lower end of the guide portion 7, and a pair of left and right first arms 8, 8 facing forward and upward and the base end in the longitudinal direction are vertically attached to the guide portion 7. A pair of left and right second arms 9, 9 movably pivoted and heading forward and downward are axially connected at their intermediate portions to form a pair of left and right vertical X-shaped rear link portions 10, and the first arm 8 and a pair of left and right third arms 11 and 11 and a second base arm 9 having a longitudinal base end pivotally attached to the front end thereof. A pair of right and left fourth X arms 12 and 12 are connected at their intermediate portions to form a pair of right and left vertical X characters. Of the forward link part 13
The left and right hydraulic cylinders 15a, 15b extend over the distal end of the first arm 8 and the distal end of the third arm 11.
Is pivotally connected. The left and right hydraulic cylinders 15a, 15b are cylindrical cylinder tubes 25.
And a piston slidable over the head H side and the bottom B side.
Are connected, the cylinder tube 25 is pivotally connected to the distal end of the first arm 8, and the piston rod 27 is pivotally connected to the distal end of the third arm 11. A face plate 16 is provided at the front of the link mechanism 6, that is, at the tip of the third arm 11 and the tip of the fourth arm 12, so that the face plate 16 can be moved forward and backward. A grip 17 is provided at the lower end of the face plate 16. Further, a pair of left and right fork claws 18 is attached to a front portion of the elevating body 2 so as to be positioned below the link mechanism 6 and the face plate 16.

Then, on the face plate 16 side,
A valve 19 is fixed to a portion between the left and right hydraulic cylinders 15a and 15b in the left-right direction.
Although not shown, is connected via a hose to a hydraulic pressure source provided on the vehicle body side. Then, one end of a first hydraulic hose 20A and one end of a second hydraulic hose 20B are connected to the valve 19. The other end of the first hydraulic hose 20A is connected to a first rotary pipe joint 21A that is rotatable back and forth about an axis extending horizontally to the left and right of the vehicle body and that is fixed to a facing surface of the cylinder tube 25 of the right cylinder 15b. The other end of the second hydraulic hose 20B is connected to a second rotary pipe joint 21B which is rotatable back and forth about an axis extending horizontally to the left and right of the vehicle body and which is fixed to a facing surface of the cylinder tube 25 of the left cylinder 15a. doing. As shown in FIG. 3, the first rotary pipe joint 21A or the second rotary pipe joint 21B has a hollow portion 31a and a pipe portion 31 having both ends opened. A rotatable portion 32 rotatable along the outer peripheral surface of the
A space 32a is formed inside the tube 2 so as to communicate from the hollow portion 31a of the tube 31 to the outside, and a fixing portion 33 is fixed to the other end of the tube 31 so as to cover the other end. A space 33a is formed in the inside of the tube 33 so as to branch off from the hollow portion 31a of the tube 31 and communicate with the outside from both sides. In the first rotary fitting 21A or the second rotary fitting 21B configured as described above,
The other end of the first hydraulic hose 20A is connected to a space 32a formed in the rotating part 32 of the first rotary fitting 21A, and a space 33a formed in the fixed part 33 of the first rotary fitting 21A. Is connected to one end of the first hydraulic pipe 23A and one end of the second hydraulic pipe 23B, and the other end of the second hydraulic hose 20B is inserted into a space 32a formed in the rotary part 32 of the second rotary pipe joint 21B. At the same time, one end of the third hydraulic pipe 23C and one end of the fourth hydraulic pipe 23D are connected to a space 33a formed in the fixed part 33 of the second rotary pipe joint 21B. The first hydraulic pipe 23A, the second hydraulic pipe 23B,
Hydraulic pipe 23 that is third hydraulic pipe 23C and fourth hydraulic pipe 23D
Is formed by a pipe or a hose. Then, the other end of the first hydraulic pipe 23A is connected to the right cylinder 15b.
The other end of the second hydraulic hose 23B is connected to the bottom B side of the cylinder tube 25 of the left cylinder 15a, and the other end of the third hydraulic hose 23C is connected to the right cylinder 15b. Connected to the head H side in the cylinder tube 25, the fourth hydraulic hose 2
The other end of the 3D is connected to the head H side in the cylinder tube 25 of the left cylinder 15a.

In the push-pull type cargo handling device thus constructed, the pressure oil is supplied from the valve 19 to the first hydraulic hose 2.
0A, the first hydraulic pipe 23A and the second hydraulic pipe 23B branch through the first rotary pipe joint 21A and are supplied to the bottom B side in the cylinder tube 25 of the left and right hydraulic cylinders 15a and 15b. , 15
b to extend the link mechanism 6 to move the face plate 16 forward. Conversely, pressurized oil is supplied to the third hydraulic pipe 23 via the second hydraulic hose 20B and the second rotary pipe joint 21B.
C and branch at the fourth hydraulic pipe 23D to supply the left and right hydraulic cylinders 15a, 15b to the head H side in the cylinder tube 25 of the left and right hydraulic cylinders 15a, 15b.
The link mechanism 6 is contracted and operated by 15b, and the face plate 16 is moved backward. Thereby, the face plate 16 can be moved forward and backward.

With this configuration, as shown in FIG. 4, when the link mechanism 6 is contracted to move the face plate 16 backward to the vehicle body side, the rotary pipe joint 21 (21)
A, 21B) can be appropriately rotated back and forth about an axis oriented horizontally to the left and right of the vehicle body, so that a part of the hydraulic hose 20 (20A, 20B) can be prevented from bending at an acute angle. In addition, since the hydraulic hose 20 always bends only in the front-back direction and does not bend in the left-right direction, the first arm 8, the second arm 9,
It is possible to prevent the hydraulic hose 20 from being caught in a portion where the third arm 11 and the fourth arm 12 intersect.

Next, a second embodiment of the present invention will be described with reference to FIGS. In a push-pull type cargo handling device which is substantially the same as the first embodiment, it is fixed to the intermediate portion in the longitudinal direction of the left and right first arms 8, 8 of the link mechanism portion 6 so as to extend over the left and right first arms 8, 8. The valve 19 is fixed to the lower surface of the connecting member 22, and one end of the first hydraulic hose 20A and one end of the second hydraulic hose 20B are connected to the valve 19. The other end portions of the first hydraulic hose 20A and the second hydraulic hose 20B are connected to a first rotary pipe joint 21A and a second rotary pipe joint 21B, respectively, which are rotatable back and forth as in the first embodiment. The first rotary pipe joint 21A is fixed to the opposing side surface of the right hydraulic cylinder 15b, branched from the first rotary pipe joint 21A and connected to the bottom B side of the left and right hydraulic cylinders 15a, 15b. The rotary joint 21B is fixed to the opposite side surface of the left hydraulic cylinder 15a, branched from the second rotary joint 21B, and connected to the head H side of the left and right hydraulic cylinders 15a, 15b.

With this structure, as in the first embodiment, as shown in FIG. 7, when the link mechanism 6 is retracted to move the face plate 16 backward to the vehicle body side, the rotary pipe joint 21 is retracted. (21A, 21B) appropriately rotate back and forth about an axis oriented horizontally to the left and right of the vehicle body, and the hydraulic hose 20 (20
A, 20B) can be prevented from bending at an acute angle, and the hydraulic hose 20 can always be bent only in the front-rear direction, so that the first arm 8, the second arm 9, the third arm 11, It is possible to prevent the hydraulic hose 20 from being bitten by a portion where the fourth arms 12 intersect.

[0012]

[Effect of the Invention] When the link mechanism is contracted to retreat the face plate to the vehicle body side, the rotary fitting rotates appropriately back and forth around the left and right horizontal axis of the vehicle body, and a part of the hydraulic hose is removed. By avoiding bending at an acute angle, breakage of the hydraulic hose and the like can be prevented. In addition, since the hydraulic hose always bends only in the front-back direction and does not bend in the left-right direction, the hydraulic hose is provided at the intersection of the first arm, the second arm, the third arm, and the fourth arm in the link mechanism. Can be prevented from being bitten. As described above, the durability of the push-pull type cargo handling device can be improved by preventing the breakage of the hydraulic hose and the prevention of biting of the hydraulic hose, and the smooth expansion and contraction operation of the link mechanism can be performed. It can also improve the performance.

[Brief description of the drawings]

FIG. 1 is a schematic top view illustrating a first embodiment of the present invention.

FIG. 2 is a schematic side view of FIG. 1;

FIG. 3 is a schematic sectional view of the rotary fitting according to the first embodiment of the present invention;

FIG. 4 is an explanatory view of the first embodiment of the present invention when the link mechanism is contracted.

FIG. 5 is a schematic top view illustrating a second embodiment of the present invention.

FIG. 6 is a schematic side view of FIG. 4;

FIG. 7 is an explanatory view of the second embodiment of the present invention when the link mechanism is contracted.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mast, 2 ... Elevating body, 3 ... Roller, 4 ... Vertical member, 5
... horizontal member, 6 ... link mechanism part, 7 ... guide part, 8 ... first arm, 9 ... second arm, 10 ... rear link part, 11 ...
Third arm, 12: Fourth arm, 13: Front link part,
15, 15a, 15b: hydraulic cylinder, 16: face plate, 17: gripping part, 18: fork claw, 19:
Valve, 20 ... Hydraulic hose, 20A ... First hydraulic hose,
20B ... second hydraulic hose, 21 ... rotary fitting, 21A ...
First rotary pipe joint, 21B: second rotary pipe joint, 22: connecting member, 23: hydraulic pipe, 23A: first hydraulic pipe, 23B: second hydraulic pipe, 23C: third hydraulic pipe, 23D: fourth hydraulic pressure tube,
25: cylinder tube, 27: piston rod, 3
1 ... tube part, 31a ... hollow part, 32 ... rotating part, 32a ... space part, 33 ... fixed part, 33a ... space part.

Claims (1)

(57) [Scope of request for utility model registration] 1. A mast 1 is erected on a front portion of a vehicle body, an elevating body 2 is provided on the mast 1 so as to be vertically movable, a fork claw 18 is provided on a front portion of the elevating body 2, and a hydraulic cylinder 15 is provided.
A push-pull type loading / unloading vehicle comprising a link mechanism portion 6 which is expandable and contractible in the front-rear direction, a face plate 16 is provided at a front portion of the link mechanism portion 6, and a grip portion 17 is provided below the face plate 16 In the cargo handling device, a hydraulic hose 20 connected to a hydraulic pressure source side for supplying hydraulic oil to the hydraulic cylinder 15 and the hydraulic cylinder 15
A push-pull type cargo handling device for a cargo handling vehicle, wherein a hydraulic pipe 23 connected to the vehicle is connected by a rotary pipe joint 21 rotatable back and forth.