JP2558462Y2 - forklift - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forklift having a hydraulic hose for supplying hydraulic pressure from a vehicle body to a hydraulically driven attachment.

[0002]

2. Description of the Related Art Conventionally, as this type of forklift, for example, there is a forklift shown in FIGS. That is, a pair of left and right fixed masts 2 are erected at the front portion of the vehicle body 1 of the forklift, and the fixed masts 2 are provided with elevating masts 3 which are guided by the fixed masts 2 and can move up and down. The lifting mast 3 is formed of a guide column 4 guided inside each fixed mast 2 and a lifting head 5 connected between the upper ends of both guide columns 4. The fixed mast 2
A lift cylinder 6 for raising and lowering the lifting mast 3 is provided on the rear surface.
The tip of the piston rod 7 of the lift cylinder 6 is connected to the upper end of each guide column 4. A fork mounting portion 10 having a fork claw 8 and a backrest 9 is provided on the lower front surface of both guide columns 4. The fork mounting portion 10 is connected to the vehicle body 1 by a lift chain 12 having an intermediate portion wound around a sheave 11, and is moved up and down via the lift chain 12 by expansion and contraction of the lift cylinder 6.
The sheave 11 is attached to the lower part of the lifting head 5 (or the outer surface of the upper end of each guide post 4).

Various hydraulically driven attachments 15 for holding and holding a load corresponding to the shape of the load to be conveyed are configured to be mounted on the fork mounting portion 10, and a hydraulic device (not shown) for the vehicle body 1 is provided. ) And the attachment 15 are connected by a hydraulic hose 16 and a steel pipe 17. The hydraulic hose 16 is supported in a state of being suspended by a turning pulley 19 of a turning portion 18 provided on one side surface of the lifting head 5 in order to cope with lifting and lowering and movement of the attachment 15. One end 16a of the hydraulic hose 16 is connected to the attachment 15 side, and the other end 16b is connected to the upper end of the steel pipe 17 led to the vehicle main body 1 via the diverting pulley 19 to the vehicle main body 1 side. The upper end side of the steel pipe 17 is fixed via a clamp 21 to a bracket 20 provided on the outside from the outer surface of the one fixed mast 2.

[0004]

[Problems to be Solved by the Invention] However, in the above-mentioned conventional type, the extension of the lift chain 12 and the extension of the hydraulic hose 16 are not synchronized, and the extension of the hydraulic hose 16 becomes larger.
There was a problem that the hydraulic hose 16 was loosened during use. In particular, since the distance from the turning portion 18 to the attachment 15 is long, if the hydraulic hose 16 becomes slack, the hydraulic hose 16 may interfere with other members or come off the turning pulley 19 when the vehicle body 1 shakes. was there.

An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a forklift capable of absorbing slack of a hydraulic hose.

[0006]

In order to solve the above-mentioned problems, a forklift according to the present invention has a fixed mast erected at a front portion of a vehicle body, and a lift mast which is guided by the fixed mast and is capable of moving up and down. A hydraulically driven attachment is provided on the lifting mast, and in a forklift having a hydraulic hose connected to the attachment from a vehicle body via a turning part provided on the upper part of the lifting mast, a turning pulley for supporting a hydraulic hose on the turning part is provided. The hydraulic hose is divided into a main hose from the attachment side to the vehicle body side via the turning pulley and a slack absorbing hose connected to the vehicle body side, and the main hose and the slack absorbing hose are jointed. Connected by this fitting, up and down direction
The short pipe part is provided at the upper and lower ends of this short pipe part.
The short tube part is clamped and fixed
Brass provided on the fixed mast via the
It is fixed to the bracket so as to be able to move up and down .

[0007]

According to the above construction, the hydraulic pressure is supplied from the vehicle body side to the attachment through the slack absorbing hose, the joint, and the main hose, so that the attachment operates.
If the main hose becomes loose, the joint is lowered by the amount of slack and then attached to the bracket of the fixed mast. As a result, the slack of the main hose is absorbed by the slack absorbing hose by the joint descending by the slack amount and the slack absorbing hose becoming slack. In addition, the joint as above
Descent, loosen the fastening fastener and lower the short pipe section
It can be done by doing. At this time, the short pipe part is arranged vertically
The simple structure allows easy fitting down
Can be dropped. After that, tighten the fixing fastener
The short pipe part to the bracket with a clamp.
The joint vibrates up and down because it can be pressed and fixed
Can be prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The same members as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIGS. 1 and 2, a hydraulic hose 31 for supplying hydraulic pressure from the vehicle body 1 to the hydraulically driven attachment 15 includes a main hose 31a and a slack absorbing hose 31b.
The main hose 31a and the slack absorbing hose 31b are connected by a joint 32. That is, one end (a) of the main hose 31a is connected to the attachment 15 side, and the other end (b) is connected to the vehicle body 1 side via the turning pulley 19 and connected to the upper end of the joint 32. The upper end of the slack absorbing hose 31b is connected to the lower end of the joint 32, and the lower end is connected to the upper end of the steel pipe 17 guided from the vehicle body 1. The lower end of the steel pipe 17 is connected to a hydraulic device (not shown) provided in the vehicle body 1.

The joint 32 includes a short pipe 33 and each short pipe 33.
And fittings 34 (for example, a bite type pipe joint or a flare pipe joint) attached to the upper and lower sides of the connector. Each connecting member 34 includes a short tube portion 33, a main hose 31a, and a short tube portion 33.
And the slack absorbing hose 31b. The joint 32 is attached to one fixed mast 2 so as to be able to move up and down. That is, a pair of upper and lower brackets 35 are provided outward from the outer surface of one fixed mast 2,
The upper and lower portions of the short pipe portion 33 are pressed and fixed to a bracket 35 by a clamp 36. Then, fixing bolts and nuts for pressing each clamp 36 against each bracket 35
37 By loosening (an example of fixing fasteners)
33 can be raised and lowered.

The operation of the above configuration will be described below.
The pressurized oil passes from the hydraulic device of the vehicle body 1 through the steel pipe 17, through the slack absorbing hose 31b, the joint 32, and the main hose 31a.
Attachment 15 because it is supplied to attachment 15
Works. When the main hose 31a is loosened, as shown by the phantom line in FIG.
After loosening the 37 and lowering the short pipe 33 of the joint 32 by the slack amount, the fixing bolt and nut 37 are tightened to press the short pipe 33 against the bracket 35 to fix it. This allows the main hose 31
The looseness a is caused by the joint 32 descending by the slack amount and the slack absorbing hose 31b being slackened.
Is absorbed by At this time, since the slack absorbing hose 31b is set short, even if the slack absorbing hose 31b becomes slack,
It is possible to prevent the looseness absorbing hose 31b from interfering with other members due to the swing of the vehicle body 1 or the like. In addition, short pipe part 33
Because it is arranged vertically, it has a simple structure
The joint 32 can be easily lowered. After that,
By tightening the fixing bolt and nut 37, the clamp
Press the short tube part 33 against the bracket 35 with the
To prevent the joint 32 from vibrating up and down.
Can be

In the above embodiment, as shown in FIG. 3, the joint 32 and the steel pipe 17 are arranged on the longitudinal coaxial 38 and connected by the slack absorbing hose 31b. As shown in FIG. 7, the arrangement of the joint 32 and the steel pipe 17 may be changed. Further, the hose 31b for absorbing slack may be fixed to the fixed mast 2 using the bracket 35, the clamp 36, the fixing bolts and the nuts 37.

In the above embodiment, the joint 32 is fixed to two upper and lower brackets 35, but it may be fixed to three or more brackets 35.

[0014]

[Effects of the Invention] As described above, according to the present invention, if the main hose becomes loose, the joint is lowered by the amount of slack and then attached to the bracket of the fixed mast , so that the slack of the main hose is reduced. The joint is lowered by the slack amount and the slack absorbing hose is slackened, and is absorbed by the slack absorbing hose. Therefore, when the vehicle body shakes, it is possible to prevent the loose hydraulic hose from interfering with other members or coming off the deflection pulley. As above
To lower the joint, loosen the fixing fastener and lower the short pipe section
Can be performed. At this time, the short pipe part
Because of the simple structure, it is easy to join
Hands can be lowered. After that, fix the fastener
By tightening, clamp the short tube with a clamp
The fitting can be pressed and fixed to the
Vibration can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a mounting portion of a hydraulic hose of a forklift according to an embodiment of the present invention.

FIG. 2 is a side view showing a mounting portion of a hydraulic hose.

FIG. 3 is a schematic side view showing an arrangement of a joint and a steel pipe.

FIG. 4 is a schematic side view showing an arrangement of a joint and a steel pipe.

FIG. 5 is a schematic side view showing an arrangement of a joint and a steel pipe.

FIG. 6 is a schematic side view showing an arrangement of a joint and a steel pipe.

FIG. 7 is a schematic side view showing an arrangement of a joint and a steel pipe.

FIG. 8 is a perspective view of a forklift in a conventional example.

FIG. 9 is a front view of a forklift in a conventional example.

FIG. 10 is a perspective view showing a mounting portion of a hydraulic hose in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle main body 2 Fixed mast 3 Elevating mast 15 Attachment 18 Turning part 19 Turning pulley 31 Hydraulic hose 31a Main hose 31b Hose for loosening absorption 32 Fitting

Claims (1)

(57) [Scope of request for utility model registration] 1. A fixed mast is erected at a front portion of a vehicle main body, and an elevating mast which is guided and guided by the fixed mast is provided, and a hydraulically driven attachment is provided on the elevating mast. In a forklift having a hydraulic hose connected to an attachment via a provided turning portion, a turning pulley for supporting a hydraulic hose is provided on the turning portion, and the hydraulic hose is moved from the attachment side to the vehicle body side via the turning pulley. The hose is divided into a main hose and a slack absorbing hose connected to the vehicle body side, and the main hose and the slack absorbing hose are connected by a joint . The joint is a short pipe portion arranged in a vertical direction.
And the connectors provided at the upper and lower ends of this short tube
And the short pipe portion is connected via a clamp and a fixing fastener.
Up and down on the bracket provided on the fixed mast
A forklift being fixed to a forklift.