JPS6011925Y2 - Screw protection device in telescopic leveling equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to a screw protection device that is installed in a leveling device such as an asphalt finisher and has a screed configured to be expandable and contractable in the lateral direction, and that prevents the screw from being destroyed by the end plate. .

As is well known, in asphalt finishing,
While the vehicle is running, the asphalt mixture put into the hopper is sent to the spredding screw at the rear using a bar feeder, where it is spread evenly from side to side and then laid flat with a screed.

By the way, in the above conventional asphalt finisher, when paving a wide road, a leveling device with a widener or a telescopic screed that is movable in the horizontal direction next to the screed, or the screed itself can be expanded and contracted in the horizontal direction. A flexible leveling device accommodates the construction width.

This type of leveling device has the advantage of being able to easily change the leveling width, but if the operator does not operate it carefully when reducing the length of the stretchable screed, etc., the ends of the stretchable screed, etc. It is easy to cause the provided end plate to collide with the spreading screw and destroy the screw.

This invention solves the above problems by attaching one end of the bearing of the shaft 8 to the side of the shaft 8 that guides the telescopic screed and removably providing a stopper. The purpose of the present invention is to provide a screw protection device that can prevent screw breakage accidents due to screw damage.

This invention will be explained below with reference to the drawings. 1 to 4 show an embodiment of this invention, in which 1 is a running vehicle body.

A hopper 2 is provided above the traveling vehicle body 1, and the asphalt mixture stored in the hopper is sent to a rear spreading screw (hereinafter abbreviated as screw) 4 by a per feeder 3 and spread uniformly on the road surface. , the main screed 5 and the telescopic screed 6 allow the floor to be laid flat.

In the above, the main screed 5 is supported by the traveling vehicle body 1 by a support arm 7 as is well known, and the telescopic screed 6 is supported by a bearing 9 provided at the rear of the main screed 5 and is parallel to the screw 4. It is supported by an installed shaft 8 and is configured to be moved from side to side in FIG. 1 by a telescoping device (not shown) such as a hydraulic cylinder.

An end plate 10 is provided at the outer end of the telescopic screed 6 to prevent the asphalt mixture from spreading laterally more than necessary.
is installed.

This end plate 10 has its base end fixed to the end of the telescopic screed 6, and its front end extended in the front-rear direction to a position substantially on the extension axis of the screw 4, and extends in a plane substantially perpendicular to the ground. I don't have it.

Note that the screw 4 is provided so that its axial direction coincides with the width direction of the traveling vehicle body 1.

On the other hand, a stopper 12 is removably attached to the shaft 8 with one end fixed to the frame 11 of the main screed 5 provided with a bearing 9.

This stopper 12 stops the telescopic screed 6 by bringing the end plate 10 into contact with it when the telescopic screed 6 is moved inward more than necessary due to an erroneous operation, and the end plate 10 strongly presses the end of the screw 4. It is formed into a U-shaped cross section, with handles 13 on both sides, and a cover 14 made of a flexible material such as rubber hanging from one side. A pair of upper and lower clamping pieces 15.
16 is provided to protrude in the length direction of the stopper 12.

Several stoppers 12 are prepared to correspond to several types of extension screws 4a connected to the screw 4, and the clamping piece 15 of one stopper 12
16, another stopper 12 is connected by fitting its edges 1 and 2a.

Note that a clamping piece 17.1B having the same structure as the clamping piece 15.16 is provided on the frame 11, and the stopper 12 is fixed in the same manner as described above.

A sheet 19 made of a flexible material such as rubber is lined with bolts 20 on the inner surface of the stopper 12, and comes in contact with the upper surface of the shaft 8 without damaging it to stabilize the stopper 12.

Next, the operation of the screw protection device according to the invention constructed as described above will be explained.

FIG. 1 shows two stoppers 12 to accommodate the extension screw 4a connected to the screw 4.
The leveling device itself is operated in the same manner as before, regardless of the presence or absence of the stopper 12, to level the asphalt mixture.

When changing the leveling width in this leveling work, the end plate 10 is moved along the length direction (lateral direction) of the shaft 8 together with the telescopic screed 6 as in the conventional method.
However, when reducing the laying width, even if you inadvertently lose the timing to stop the screed 6 and the end plate 10, the inward movement of the end plate 10 and the telescopic screed 6 will not end. Since the plate 10 is prevented from coming into contact with the stopper 12, the end plate 10 will not hit the screw 4a and break it.

When the extension screw 4a is replaced with a longer one, the number of stoppers 12 used is increased, as shown in FIGS. 3 and 4, and when the extension screw 4a is replaced with a shorter one, the number of stoppers 12 used is increased. Achieve your goal by reducing.

The cover 14 installed vertically over the stopper 12 serves to prevent scattered pieces of asphalt mixture and other foreign matter from entering the screed during construction. However, it is preferable to provide the stopper 12 on both sides thereof.

In the illustrated embodiment, clamping pieces 15°, 16, 17, and 18 are used as means for fixing and connecting the stopper 12.
Other fastening and connecting means can be used.

Further, the stopper shown in the figure is formed to have a strong U-shaped cross section and is supported so as to cover the upper half of the shaft 8, but the stopper is not limited to this.

As explained above, the screw protector of this invention is
A stopper 12 is provided on the shaft 8 to prevent excessive inward movement of the end plate 10, so that it is possible to forget to stop the end plate 10 when the end plate 10 is retracted inward. Even if the end plate 10 prevents the screws 1a,
4 will never be destroyed.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is a plan view of a telescopic leveling device equipped with a screw protector of this invention; Fig. 2 is a front view showing the relationship between the shaft and the stopper; The opening of Figure 2 is the A-A cross-sectional view of Figure 2 A, and Figure 3.
The figure is a plan view showing the connected state of the stopper, and FIG. 4 is a side view of the same. 4...spreading screw, 6...
...Screed, 8...Shaft, 9...
...Bearing, ...End plate, 12...
stopper. 10...

Claims (1)

[Scope of utility model registration request] A shaft 8 is disposed parallel to the above-mentioned spreading screw 4 behind the spreading screw 4, which is provided with its axial direction aligned with the width direction of the traveling vehicle body 1, and a screed 6 is attached to the shaft 8. 8 is movable in the length direction of the screed 6, and an end plate 10 is attached to the outer end of the screed 6 with its front end positioned on an extension line of the spreading screw 4. A screw protection device for a telescopic leveling device, characterized in that a stopper 12 is detachably supported on the shaft 8 by fixing one end thereof to a bearing 9 side of the shaft 8.