JPH05187039A - Earth and sand drop prevention device for shovel loader - Google Patents

Abstract

PURPOSE:To minimize the penetration of earth and sand into an operator's seat and protect the operator's upper field of vision from being disturbed by moving an earth and sand receiving tray above an operator guard longitudinally in conformity with the motion of a lift arm. CONSTITUTION:An earth and sand receiving tray 15 mounted to a ceiling portion of an operator guard 3 is designed to move horizontally, responding to the motion of a lift arm by means of a pushable cable 23. When the lift arm 1 is located at the uppermost position, the earth and sand receiving tray 15 is adapted to project forward from the front edge of the ceiling portion so as to receive the earth and sand, if it drops from a bucket. When the lift arm 1 is located at the lover most position, the earth and sand receiving tray 15 is adapted to stay behind the front edge of the ceiling portion so as to secure the upper field of vision from an operator's seat and present its lifting performance from being interrupted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shovel loader, and more particularly to a means for preventing earth and sand from falling from a bucket and entering a driver's seat when a lift arm of the shovel loader is raised.

[0002]

2. Description of the Related Art The shovel loader shown in FIG. 4 is generally called a skid steer loader, and has a lift arm 1
Is a type that swings the side part of the driver's seat up and down. In this skid steer loader, since the lift arm 1 prevents entry / exit from the side of the machine base, the front portion of the driver's seat is opened, and the entry / exit opening 2 is provided there. An operator guard 3 is provided to protect the driver in the driver's seat, and an eaves 5 slightly projecting forward is formed on the ceiling portion 4 of the operator guard 3. This eaves 5 is for preventing the earth and sand falling from the bucket 6 from entering the driver's seat through the entrance 2 when the lift arm 1 is at the uppermost position.

[0003]

However, if the eaves 5 is extended in front of the step 7 of the entrance / exit 2 only for the purpose of reducing the fall of the earth and sand, the eaves 5 becomes an obstacle when the driver gets on and off. , Worsens getting on and off. Further, in order to secure the upper visual field, it is preferable that the eaves 5 be as short as possible. Therefore, in the conventional case, the eaves 5 are prevented from projecting forward of the step 7.

Therefore, in the conventional configuration, the lift arm 1
When raised to the uppermost position, part of the earth and sand falling from the back surface of the bucket 6 may not be received by the eaves 5 and may fall around the step 7 or the cargo handling operation pedal 8.
There was a risk of disturbing the pedal operation.

Therefore, an object of the present invention is to provide a device for preventing or suppressing falling of earth and sand.

[0006]

In order to achieve the above object, the earth and sand fall prevention device according to the present invention comprises a earth and sand receiving tray movably attached to the ceiling portion of an operator guard in the front-rear direction and a lift arm. When in the uppermost position, the sediment receiving tray is projected more forward than the front edge of the ceiling part of the operator guard, and when the lift arm is in the lowermost position, the sediment receiving tray is in the front edge of the ceiling part. It is characterized in that it is composed of a tray moving means for moving the earth and sand receiving tray back and forth according to the operation of the lift arm so as to be located rearward of the section.

[0007]

According to the above construction, when the lift arm moves up and reaches the uppermost position, the earth and sand receiving tray extends to the vicinity of the lower position of the bucket, so that the earth and sand falling from the rear portion of the bucket can be received by the tray.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described in detail below with reference to the drawings, in which the same or corresponding parts are designated by the same reference numerals.

As shown in FIG. 1, the skid steer loader in which the earth and sand fall prevention device 10 according to the present invention is mounted is provided on each of the left and right sides of the rear portion of the machine frame 11 as in the conventional configuration described above. An end of the lift arm 1 is pivotally supported on the pillar 12 by an arm pin 13. The lift arm 1 is vertically swung by a lift cylinder 14 about an arm pin 13. An operator guard 3 is installed around the driver's seat, and a front portion of the operator guard 3 is opened to form an entrance / exit 2.

The earth and sand fall prevention device 10 according to the present invention includes a earth and sand receiving tray 15. As shown in FIGS. 2 and 3, the tray 15 for receiving the sediment is provided with the earth receiving plate 16, the front plate 17 attached to the front edge portion thereof, and the left and right side edge portions. It is composed of a side plate 18. Sediment receiving plate 1
Guide members 19 extending in the front-rear direction are attached to the left and right of the lower surface of 6 by bolts and the like, and each guide member 19 has a T-shaped groove formed along the longitudinal direction thereof. On the other hand, on the upper surface of the ceiling portion 4 of the operator guard 3, a pair of left and right T-shaped rails 20 extending in the front-rear direction are fixed at the same intervals as the intervals of the guide members 19, and each T-shaped rail 20 corresponds. By fitting in the T-shaped groove of the guide member 19, the earth and sand receiving tray 15 can be attached to the ceiling portion 4 of the operator guard 3 so as to be movable in the front-rear direction. Reference numeral 21 is a roller for facilitating the forward and backward movement of the sediment receiving tray 15, and a plurality of rollers are provided on each rail 20.

A cable stopper 22 is fixed to the rear portion of the lower surface of the earth and sand receiving plate 16, and one end of a push-pull cable 23 is connected thereto. The outer tube 24 surrounding the push-pull cable 23 is guided into either the left or right pillar 12 and fixed by a tube bracket or the like, and the other end of the push-pull cable 23 is a side surface of the lift cylinder 14 pivotally supported by the pillar 12. Fixed in place.

In such a structure, when the lift arm 1 is at the lowest position as shown by the solid line in FIG. 1, the lift cylinder 14 is also at the lowest position and the push-pull cable 23 is pulled downward. Therefore, the sediment receiving tray 15 connected to the push-pull cable 23 is pulled rearward, and the front plate 17 thereof is located at the same position as the front edge of the ceiling portion 4 of the operator guard 3 or slightly rearward. At this position, the tray for receiving sand 1
5 does not interfere with the getting on and off of the driver, and the upper field of view is secured.

When the piston rod of the lift cylinder 14 is extended, the lift arm 1 ascends and the lift cylinder 14 itself rotates upward about its pivot point. With this movement, the push-pull cable 23 is pushed out from the outer tube 24 to the earth and sand receiving tray 15 side,
As a result, the sediment receiving tray 15 moves forward. When the lift arm 1 reaches the uppermost position, the sediment receiving tray 1
5 is extruded to the position shown by the chain double-dashed line in FIG. Therefore, even if the earth and sand fall from the back surface of the bucket 6 in this state, most of the earth and sand is received by the earth and sand receiving tray 15, and the earth and sand entering the driver's seat through the entrance 2 is drastically reduced. In this state, the tray 15 for receiving the earth and sand
May obstruct the upper visual field, but the problem can be solved by forming at least the earth and sand receiving plate 16 from a transparent acrylic plate or the like.

When the lift arm 1 is lowered from the uppermost position,
It will be easily understood that the push-pull cable 23 is pulled by the lift cylinder 14 to return the sediment receiving tray 15 to the original rear position.

In the above-described embodiment, the push-pull cable 23 is used as the moving means for the sediment receiving tray 15, but other means such as a link mechanism, an electric means including a lift arm position detecting device and an electric motor, and the like. It is also possible to use.

[0016]

As described above, according to the present invention, the earth and sand receiving tray of the earth and sand fall prevention device projects forward from the ceiling portion of the operator guard when the lift arm moves upward, and falls from the bucket. You can take it. Therefore, the sediment is less likely to enter the driver's seat, and the sediment is prevented from being deposited around the cargo handling operation pedal and hindering the operation.

Further, when the lift arm is lowered, the lift arm fits inside the ceiling portion, so that the upper field of view is secured and the ease of getting on and off is not impaired.

[Brief description of drawings]

FIG. 1 is a side view showing a skid steer loader equipped with an earth and sand fall prevention device according to the present invention.

FIG. 2 is a rear view of a tray for receiving a sediment of the sediment fall prevention device shown in FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a side view showing a conventional skid steer loader.

[Explanation of symbols]

 1 Lift Arm 2 Entrance / Exit 3 Operator Guard 4 Ceiling Part 10 Sediment Drop Prevention Device 15 Sediment Receiving Tray 23 Push-Pull Cable (Tray Moving Means)

Claims (1)

[Claims] 1. In a shovel loader in which a lift arm swings up and down on a side portion of a driver's seat and a front portion of an operator guard is opened to serve as an entrance / exit opening, the front and rear portions are moved to a ceiling portion of the operator guard. If possible, the sediment receiving tray and the lift arm, when the lift arm is at the uppermost position, project the sediment receiving tray forward of the front edge of the ceiling portion, and the lift arm is at the lowest position. And a tray moving means for moving the sediment receiving tray back and forth according to the operation of the lift arm so that the sediment receiving tray is located rearward of the front edge of the ceiling portion. Sediment fall prevention device for loader.