JPH0270698A - Forklift provided with sinking fork - Google Patents

Abstract

PURPOSE:To smoothly move a sinking mast so as to prevent its damage by providing a rolling member being able to move between a fall down position and a rising position further supporting the sinking mast, vertically moving in a follow-up manner to a lift bracket in its vertical movement, and for rolling on a floor surface. CONSTITUTION:A lift cylinder is gradually extended, when a lift bracket 4 is gradually lifted, in a follow-up manner to this action, a base end part of a sinking mast 5 is lifted, and its point end part is pulled to the right. Here the sinking mast 5 provides in its point end part a roller 11 rolling on a floor surface, and the point end part moves to the right. In this way, this point end part comes into no contact with the floor surface, and the sinking mast 5 is smoothly moved. The sinking mast 5, when it is placed in a rising condition, is connected to an outer mast 2 by a supporting plate, and the point end part of the sinking mast 5 is held so as to be prevented from moving to the left.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a forklift truck equipped with submerged forks.

[Prior art] As this type of forklift, for example, Japanese Patent Application Laid-Open No. 60-1
There is one disclosed in No. 9697. As shown in Fig. 4, this forklift is provided with an inner mast 32 on each inner side of a pair of outer masts 31 (only one shown) that is erected and held at the front of the vehicle, and is attached to these inner masts 32 so as to be movable up and down. A connecting plate 35 of a vertically long sinking mast 34 is attached via a lift bracket 33. The lift bracket 33 is moved up and down via a chain rotation mechanism in accordance with the expansion and contraction of a lift cylinder (not shown).

When this forklift is not in use, the lift bracket 33 is removed from the inner mast 32, the sinking mast 34 is detached from the vehicle, the vehicle is stored, and the sinking mast 34 is stored in a lying state, thereby creating a storage space. The restrictions are removed.

Furthermore, in order to attach the sinking mast 34 to the vehicle, as shown in FIG. Attach the upper part of the connecting plate 35 to the pin 36
Rotatably connect at. After this, the lift bracket 33 is moved upward to gradually raise the sinking mast 34 and held in the completely upright position, and then the vehicle is moved to a step and stopped, and the fork is moved to the lowest position, The connection hole 37 at the bottom of the connection plate 35 and the lift bracket 3
By inserting the pin into the insertion hole 38 of No. 3, the sinking mast 34 is completely mounted on the vehicle.

[Problems to be Solved by the Invention] However, when moving the sinking mast 34 described above from the sideways state to the upright state, the tip of the sinking mast 34 moves along the floor of the workplace toward the lift bracket 33. . Therefore, if the tip of the sinking mast 34 is brought into contact with the floor of the workplace and the sinking mast 34 is erected, the tip will scrape against the floor, damaging the tip and causing the floor to be scraped. It will be done. For this reason, the sinking mast 3
It is necessary to support the tip end of 4 on a cart 39 with rollers, and protect it with the cart 39 when the tip moves toward the lift bracket 33 side. Therefore, if the worker forgets to prepare the trolley 39, he or she will not be able to carry out the work with the preservation of equipment in mind. Moreover, preparing the trolley 39 separately from the vehicle increases costs.

This invention was made to solve the above-mentioned problems, and its purpose is to ensure the preservation of equipment during cargo handling operations without the need to prepare separate parts for the sinking mast.
Furthermore, it is an object of the present invention to provide a forklift truck equipped with a sinking fork that can realize cost reduction.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes a lift bracket that is attached to an inner mast so as to be movable up and down, and when the lift bracket is in a lower position, one end of the lift bracket is attached to the inner mast. When the lift bracket is moved between the lower position and the upper position, when the lift bracket is moved between the lower position and the upper position, a sinking mast that is moved between upright positions and further moves up and down following the vertical movement of the lift bracket; a fork that is attached to the other end of the sinking mast and moves integrally therewith; In order to smoothly move the sinking mast when the sinking mast is moved between the horizontal position and the upright position, a rolling member that supports the sinking mast and rolls on the floor surface is provided. This is the summary.

[Function] By employing the above-mentioned means, the present invention can prevent the rolling member supporting the sinking mast from rolling on the floor surface when the sinking mast is moved between the horizontal position and the upright position. ,
Move the sinking mast smoothly.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 to 3.

In FIG. 1, a pair of outer masts 2 (only one of which is shown) are erected and fixed at the front of a forklift vehicle l.
An inner mast 3 is arranged inside each outer mast 2. A mast lift bracket 4 is attached to the inner mast 3, and a sinking mast 5 is attached to the lift bracket 4 via a connecting bracket 6.

Further, the lower part of the sinking mast 5 is connected to a connecting plate 7 fixed to the outer mast 2 via a support plate 8, so that the sinking mast 5 cannot swing back and forth with respect to the outer mast 2. It is supported so that it can move up and down. Further, a fork 10 is attached to the front lower end of the sinking mast 5 via a fork lift bracket 9, and a roller 11 as a rolling member is provided at the rear of the lower end.

The inner mast 3 is a lift cylinder (not shown)
The lift bracket 4 protrudes and retracts from the outer mast 2 due to the expansion and contraction, and the lift bracket 4 correspondingly moves between the highest position shown in FIG. 1 and the lowest position shown in FIGS. 2.3.

To attach the sinking mast 5 to the inner mast 3,
As shown in the figure, the upper part of the connection bracket 6 of the sinking mast 5 and the upper part of the lift bracket 4 are rotatably connected by a pin 12, and the sinking mast 5 is connected to the floor surface at its base end (right end). Hold it in a horizontal position, tilted so that it approaches the At this time, the tip of the sinking mast 5 is supported by the rollers 11 and does not come into contact with the floor surface.

When the lift cylinder is gradually extended in the above state and the lift plate/toe 4 is gradually raised, the base end of the sinking mast 5 rises and the tip end is pulled to the right. Therefore, the roller 11 provided at the tip of the sinking mast 5 rolls on the floor surface, and the tip moves to the right. As shown in FIG. 1, when the sinking mast 5 is in the upright state, the sinking mast 5 is connected to the outer mast 2 by the support plate 8, and the tip of the sinking mast 5 is prevented from moving to the left. is maintained.

Thereafter, as shown in FIG. 3, the forklift is stopped just before the step, and the sinking mast 5 is lowered until the fork 10 comes into contact with the bottom of the step. In this state, the lower part of the connecting bracket 6 of the sinking mast 5 and the lower part of the lift bracket 4 are connected with the pin 13, and the sinking mast 5 is securely attached to the inner mast.

As described above, when the sinking mast 5 is moved from the sideways position to the upright position, the roller 11 provided at the tip of the sinking mast 5 rolls on the floor, so that the tip touches the floor. The movement of the sinking mast 5 is performed smoothly without contact. Therefore, during this movement, the sinking mast 5 will not scrape the floor surface or damage itself.

Further, when the forklift is not in use, the sinking mast 5 is removed from the vehicle 1 due to the storage space required to store it. At this time, the sinking mast 5 is moved from the upright position to the sideways position in the reverse order to the above. Also in this case, due to the rolling of the rollers 11, the tip of the sinking mast 5 moves smoothly without contacting the floor surface.

[Effects] As described in detail above, the present invention exhibits the excellent effects of ensuring the preservation of equipment during cargo handling operations and further reducing costs without preparing separate members.

[Brief explanation of the drawing]

Figure 1 is a side view showing the forklift with the sinking mast held in the upright position, Figure 2 is a side view showing the forklift with the sinking mast in the horizontal position, and Figure 3 is the side view showing the forklift with the sinking mast lowered onto the stepped ground. FIGS. 4 and 5 are side views showing conventional examples, respectively. A vehicle 1, a lift bracket 4, a sinking mast 5, a fork 10, and a roller II as a rolling member.

Claims (1)

[Scope of Claims] 1. A lift bracket mounted to the inner mast so as to be movable up and down; when the lift bracket is in the lower position, one end is connected to the lift bracket, and the other end is connected to the lift bracket from the same end to the other end. When the lift bracket is moved between the lower position and the upper position, it is moved between the sideways position and the upright position, and furthermore, the lift bracket a sinking mast that moves up and down following the movement; a fork that is attached to the other end of the sinking mast and moves integrally therewith; and a fork that moves the sinking mast between a sideways position and an upright position. A forklift truck equipped with a sinking fork that is provided with a rolling member that supports the sinking mast and rolls on a floor surface in order to smoothly move the sinking mast when the sinking mast is moved.