JPS61197397A - Mast for forklift - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a mast for a forklift, and more specifically, the present invention relates to a mast for a forklift truck, and more specifically, the mast for a forklift truck does not damage the handled load, has a small cross-sectional dimension, and has a good visibility for the driver. This invention relates to a forklift mast that reduces vehicle weight by reducing rotational moment caused by loads.

(Prior art) In the conventional 7 Oak I Noah F, as shown in Fig. 3, the stationary mast 2 is provided to sandwich the elevating mast 1 provided on the left and right sides from the left and right outside of the elevating mast 1, and the elevating mast 1 and the stationary It has a structure in which a carriage 3 is provided at the front F of the tanari mast 2.

In addition, in the 7 Oakley 7F, where two elevating masts are provided on the left and right, as shown in FIG.
A stationary mast 5 is provided to sandwich the stationary mast 5 from the left and right sides of the stage 3, and a carriage 6 is provided in front F of the elevating mast 4 and the stage 3 stationary mast 5.

(Problems to be Solved by the Invention) In the above conventional forklift, the elevating mast 1.4 protrudes in front of the stationary mast 2.5, which is a stationary part. There was a risk that the 4 and the cargo would come into contact and damage the cargo. In other words, the cargo handled is carriage 3.
．． 6 side, and when the elevating mast 1.4 moves up and down, if a load to be handled protrudes to the elevating mast 1.4 side, the elevating mast 1.4 moves up and down.
4 and the cargo to be handled, resulting in damage to the cargo.

Furthermore, in the 7 Oakley 7F equipped with two elevating masts 4 shown in Fig. 4, in addition to the above-mentioned drawbacks, the stationary mast 5 is located away from the carriage 6, so the rotational moment due to the weight of the cargo to be handled is reduced. Therefore, the weight of the vehicle must be increased to prevent it from tipping, which has the disadvantage of increasing the weight of the vehicle.

In order to improve the above-mentioned drawbacks, a forklift mast having the structure shown in FIG. 5.6 is also known.

That is, the cross-sectional shape of the elevating mast 7.8 is 1
71.8. By eliminating the stationary mast 9 side, the front end of the elevating mast 7.8 and the front end of the stage B stationary mast 9 are made to coincide with each other.

However, even with the improved mast structure shown in Figure 5.6 above, there is still a risk of damage to the cargo being handled, and the mast has a large cross-sectional shape, which narrows the driver's visibility. Ta.

Furthermore, in the case shown in Fig. 6, since the distance between the carriage and the stage B mast is large, the vehicle tends to tilt due to the rotational moment due to the weight of the cargo being handled, so the weight of the vehicle must be increased. ing.

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks and provide a mast for the 7 Oakley 7F that does not damage the cargo being handled and has a reduced cross-sectional dimension to reduce vehicle weight.

(Means for Solving the Problems) The present invention is characterized in that a stationary mast is provided to sandwich the elevating masts provided on the left and right sides from the left and right sides of the elevating masts, and a carriage is provided in front of the elevating mast and the stationary mast. In a forklift mast equipped with a forklift, the cross-sectional shape of the elevating mast is type 1, the cross-sectional shape of the stationary mast is a U-shaped groove type, and the front flange of the stationary mast is located closer to the carriage than the front flange of the elevating mast. The front flange of the elevating mast is disposed within the U-shaped groove of the stationary mast.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

Referring to FIG. 1, a stationary mast 12 is provided so as to sandwich the elevating masts 11 provided on the left and right sides from the left and right sides of the outside.

Elevating mast 11 and stationary mast 1
A carriage 13 is provided in front of the mast 2, the cross-sectional shape of the elevating mast 11 is a type 1, and the cross-sectional shape of the stationary mast 12 is a U-shaped groove type. The elevating mast 11 has a front flange 111 and a rear flange 11.
□, and the stage a mast 12 also has a front flange 12. and a rear flange 12□.

The front flange 121 of the stationary mast 12 is arranged closer to the carriage 13 than the front flange 111 of the elevating mast 11, and the elevating mast 11
The front flange 111 of the stationary mast 12 is disposed in the U-shaped groove of the stationary mast 12.

According to the above embodiment of the present invention, since the elevating mast 11 is located behind the stage a final mast 12, there is no damage to the handled cargo due to the vertical movement of the elevating mast 11.

FIG. 2 relates to a mast structure having two elevating masts, in which a stationary mast 23 is provided so as to sandwich two elevating masts (21, 22) provided on the left and right from the outside from the left and right. A carriage 24 is provided in front of the elevating masts 21 and 22 and the stationary mast 23, the elevating mast 21 has an I-shaped cross section, and the stationary mast 23
The cross-sectional shape is a U-shaped groove.

The elevating mast 21 has a front flange 21 and a rear flange 21□, and the stationary mast 23 also has a front flange 23. and a rear flange 23□. Forward flange 2 of the elevating mast 21
1. Stationery mast 2 on the carriage 24 side
3, and the front flange 211 of the elevating mast 21 is placed in the U-shaped groove of the stationary mast 12.

The elevating mast 22 also has an I-shaped cross section, and is arranged so that the front flange 221 coincides with the front flange 231 of the chistage polishing mast 23. Further, the forward flange 21 of the elevating mast 21 is the forward flange 22 of the elevating mast 22. It is placed in a groove formed by.

According to the above embodiment, the elevator mass) 2L22
is located at least at the same position as the stationary mast 23 or at the rear thereof, so there is no damage to the handled cargo. Furthermore, since the carriage 24 and the stationary mast 23 are not separated, the rotational moment due to the weight of the cargo being handled is small.
Even if the weight of the vehicle is reduced, there is no fear that the vehicle will tilt.

(Effects of the Invention) As described above, the present invention provides the following effects.

Damage to handled cargo due to vertical movement of the elevating mast is reduced.

Since the cross-sectional dimensions of the mast are small, the driver's field of view is wide and there is no hindrance to cargo handling operations. -1° Carriage and Stage 3 Narimast are close to each other, so the rotational moment due to the weight of the cargo being handled is small. Vehicle weight is reduced.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a mast showing one embodiment of the present invention;
The figure is a sectional view of a mast showing another embodiment of the present invention! @3
The figure is a sectional view showing an example of a conventional mast, FIG. 4 is a sectional view showing another example of a conventional mast, FIG. 5 is a sectional view showing an improved example of FIG. 3, and FIG. FIG. 11: Elevating mast 12: Stage 3 mast 13: Carriage 21: Elevating mast 22: Elevating mast 23: Stationary mast 24: Carriage

Claims (3)

[Claims] (1) In a forklift mast in which a stationary mast is provided to sandwich the elevating masts provided on the left and right sides from the outside left and right, and a carriage is provided in front of the elevating mast and the stationary mast, the cross-sectional shape of the elevating mast is I. The stationery mast has a cross-sectional shape of a U-shaped groove, and the front flange of the stationery mast is arranged closer to the carriage than the front flange of the elevating mast, and the front flange of the elevating mast is set to the front flange of the stationary mast. A forklift mast characterized by being arranged in a U-shaped groove. (2) The forklift mast according to claim 1, wherein there is only one elevating mast provided on the left and right sides. (3) In a forklift mast in which a stationary mast is provided to sandwich two elevating masts provided on the left and right from each other from the outside left and right, and a carriage is provided in front of the elevating mast and the stationary mast, the elevating mast The cross-sectional shape is I-shaped, the cross-sectional shape of the stationary mast is U-shaped groove type, and the front flange of the stationary mast is closer to the carriage than the front flange of the outer one of the two elevating masts. the forward flange of the elevating mast is disposed within the U-shaped groove of the stationary mast;
A forklift mast characterized in that the front end of the inner elevating mast and the front end of a stationary mast are made to coincide with each other.