JPH083447Y2 - Lifting and opening / closing mechanism of the rear gate for the scraper - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is to raise and lower the rear gate of a device for raveling and unraveling a road surface for the purpose of re-paving, etc., and to perform inspection and maintenance. The present invention relates to a mechanism that opens and closes in order to deal with the above.

[Conventional technology]

The conventional scraping device is between the machine frame and the rear gate,
An elevating and lowering drive device for raising and lowering according to changes in the scraping depth and an opening and closing drive device for opening and closing the rear gate for the purpose of inspection and maintenance of the cutter bit etc. provided on the cutter drum are separately provided. In order to move the rear gate up and down, a lift drive device is operated, and in order to open and close the rear gate, an open / close drive device is operated to perform respective operations.

[Problems to be solved by the device]

However, in the above-mentioned conventional technique, since the driving device is separately provided for two types, one for lifting and the other for opening and closing, there is a problem that the structure is complicated and the cost is high.

The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to share a drive device for lifting and lowering and for opening and closing.

[Means for solving the problem]

The rear gate raising and lowering and opening / closing mechanism for the scraping and unwinding device of the present invention pivotally attaches the upper part of the opening / closing frame to the rear part of the machine frame by a horizontal shaft and supports the opening / closing frame so as to be pivotable rearward.
On the machine frame side and the opening / closing frame side, while a turning restraining engaging hole for engaging a pin for controlling the turning is provided, the rear gate is installed in the opening / closing frame so as to be vertically movable, and the rear gate side and the opening / closing An elevating suppression engaging hole for engaging the elevating suppressing pin is provided on the frame side, and further selectively engaged with either the turning suppressing engaging hole or the elevating suppressing engaging hole. And a cylinder device extending in the up-and-down direction behind the horizontal axis between the machine frame and the rear gate.

The pin that selectively engages with either the turning suppression engagement hole or the elevation suppression engagement hole may be one in which one pin is selectively engaged with both engagement holes. Then, a pin for the turning suppression engagement hole and a pin for the elevation suppression engagement hole are individually provided, and one of the pins is engaged with the corresponding engagement hole and the other pin is removed. You can also

[Action]

When the rear gate is moved up and down, the pin is engaged in the turning suppression engagement hole, and the pin is not engaged in the elevation suppression engagement hole. At this time, the rear gate maintains a closed state because the opening / closing frame is prevented from turning, and in this state, when the cylinder device is expanded / contracted according to the raking depth, the rear gate connected to one end of the cylinder device is Move up and down with respect to the open / close frame. At this time, the open / close frame is connected to the machine frame at two points, that is, the horizontal axis and the pin engaged with the turning suppressing engagement hole, and therefore does not turn.

When the rear gate is opened and closed, the pin of the turning restraining engagement hole is pulled out to connect the opening and closing frame to the machine frame only on the horizontal axis, and the pin or another pin is lifted and held in the restraining engagement hole. To suppress the lifting and lowering of the rear gate with respect to the open / close frame. When the cylinder device is contracted in this state, since the cylinder device is installed behind the horizontal shaft, the opening / closing frame pivots rearward about the horizontal shaft by the operating force applied to the rear gate. As a result, the rear gate installed in the open / close frame is opened, and the rear part of the machine frame is opened. Further, when the cylinder device is extended, the open / close frame turns around the horizontal axis in the opposite direction to the previous direction, the rear gate is closed, and the rear part of the machine frame is closed.

〔Example〕

An embodiment of the present invention will be described with reference to FIG. This scraping and disassembling device has a front in the left direction in the figure, and a suspension device (not shown) may be used, for example.
It is suspended in the traveling vehicle as described in the publication.
The relative height position with respect to the traveling vehicle is adjustable by the suspension device.

The machine frame 1 is rotatably supported by a cutter drum 3 (a cutting edge of the cutter bit is shown in the figure) having a cutter bit for scraping the road surface on the outer periphery. No rotary drive source is connected.
At the lower part of the machine casing 1, side covers (not shown) are attached to the left and right side faces, and a front cover 2 is attached to the front face. Since the respective configurations of the machine casing 1 and the cutter drum 3 and their mutual relations and their functions are well known, detailed description thereof will be omitted.

An opening / closing frame 6 is pivotally attached to a bracket 4 fixed to the upper end of the machine frame 1 by a horizontal horizontal shaft 5 whose axis extends in the left-right direction so as to be rotatable around the horizontal shaft 5. .
The open / close frame 6 includes a plate 6a through which the horizontal shaft 5 passes,
A plate 6b on the front side that contacts the rear surface of the machine frame 1, a plate 6c on the rear side that supports a rear gate 7, which will be described later, and a reinforcing box 6d on the lower side are welded together to form the plate 6a.
In the lower part of the horizontal axis 5, a turning suppressing engagement hole 6e is formed.

A bracket 8 is projectingly provided on the rear surface of the machine frame 1, and this bracket 8 also has the turning suppressing engagement hole in FIG.
A swivel suppressing engagement hole 8e (see FIG. 3) is formed at a position overlapping with 6e, and a pin 9 is provided in both swivel suppressing engaging holes 6e, 8e.
Are inserted and engaged.

A rear gate 7 is provided on a rear surface of the plate 6c on the rear side of the opening / closing frame 6 so as to be capable of moving up and down through an elevating mechanism 11. The lifting mechanism 11 includes a pair of brackets 11a fixed to the rear surface of the plate 6c (one bracket 11a is not shown) and a cylinder 11b fixedly supported so as to be held between the pair of brackets 11a. And a guide shaft 11c which is fitted in the cylinder 11b and moves up and down in the vertical direction. Cylinder 1
The inner surface of 1b is provided with a known structure such as a sliding bush for smoothly sliding the guide shaft 11c up and down.

The rear gate 7 is fixed to the guide shaft 11c of the elevating mechanism 11. The rear gate 7 includes an elevating frame 7a fixed above and below the guide shaft 11c and including the guide shaft 11c, a gate plate 7b fixed to the front surface of the elevating frame 7a and in contact with the plate 6c of the opening / closing frame 6, and a gate plate. 7b and lifting frame 7a
A reinforcing stay 7c fixed to the lower end of the gate plate 7b, and a rubber plate 7d fixed to the lower end of the gate plate 7b by a bolt nut or the like and slidingly contacting the road surface. The long hole 7e is opened to avoid the interference. The gate plate 7b has a size that covers the entire width of the machine casing 1, which covers the lower rear surface of the machine casing 1.

Thus, the elevating mechanism 11 can support the rear gate 7 on the open / close frame 6 so as to be vertically movable.

The rear gate 7 has a guide shaft 11c that moves up and down together with the rear gate 7.
The tongue piece 7f is fixed via the upper end portion, and the lifting restraint engaging hole 7g is formed in this. Further, a tongue piece 11d is fixed to the opening / closing frame 6 through one of the pair of brackets 11a fixed to the opening / closing frame 6 which is not shown behind the cylinder 11b. In the figure, the lifting restraint engaging hole 7
It can be said that an up-and-down restraining engaging hole that overlaps with g is opened. The tongue piece 11d is configured so as to avoid interference with the elevating frame 7a of the rear gate 7 and to project through, for example, an opening provided in the elevating frame 7a. The pins 9 engaged with the turning restraining engaging holes 6e, 8e are pulled out from both the raising and lowering restraining engaging holes, and then engaged therein.

A bracket 12 extending further rearward than the bracket 4 is fixed to the machine frame 1, while a bracket 7h is fixed to a lower portion of the elevating frame 7a of the rear gate 7, and a cylinder device 13 is provided between the brackets 12 and 7h. Is erected. The cylinder device 13 is located behind the horizontal shaft 5.

Then, when the road surface is to be unraveled normally by the unraveling device, the pin 9 is inserted into and engaged with the turning suppressing engagement holes 6e, 8e formed in the opening / closing frame 6 and the bracket 8. deep. As a result, the open / close frame 6 is locked by the horizontal shaft 5 and the pin 9 and fixed to the machine frame 1. At this time, the rear gate 7 is closed at the rear of the machine frame 1, but the open / close frame 6 Since the guide shaft 11c is not locked in the axial direction between the rear gate 7 and the rear gate 7, when the cylinder device 13 is expanded and contracted, the rear gate 7 is slid up and down with respect to the cylinder 11b in the elevating mechanism 11. Moves up and down.

FIG. 1 shows a case where there is a large difference in height between the road surface Ra before the raking and the raking surface Pb by the cutter drum 3, and FIG. 2 shows the height before and after the raking work is started. The case where there is no difference is shown. By raising and lowering the rear gate 7 according to the height difference as described above, the rubber plate 7d at the lower end is constantly slid on the road surface, thereby preventing scraped scraps from remaining behind.

Further, at the time of replacement of the worn cutter bit of the cutter drum 3 and other inspection and repair, the pin 9 is pulled out from the turning suppressing engagement holes 6e, 8e so that the opening / closing frame 6 is supported to the machine frame 1 only at the horizontal shaft 5. On the other hand, the removed pin 9 is inserted and fixed in the ascending / descending engagement hole 7g between the opening / closing frame 6 and the rear gate 7, and the guide shaft 11c is provided between the opening / closing frame 6 and the rear gate 7.
Lock in the axial direction of.

When the cylinder device 13 is contracted in this state, the cylinder device 13 is located behind the horizontal shaft 5, so that the rear gate 7
And the opening and closing frame 6 are united and turn backward to open the rear gate. This is the state shown in FIG. 3, and since the rear part of the machine casing 1 is wide open, a worker can use this to move in and out of the machine casing 1. On the contrary, when the cylinder device 13 is extended, the rear gate 7 is closed and the rear part of the machine frame 1 is restored to the original closed state as shown in FIG. The pin 9 for changing the insertion position may be connected to an appropriate position by a chain or the like to prevent loss.

The gate plate 7b is provided with one elevating frame 7a, one elevating mechanism 11 is provided on the one elevating frame 7a, and one cylinder device 13 is installed between the elevating frame 7a and the machine frame 1 to be illustrated. However, when the width of the machine frame 1 and the gate plate 7b is large, two sets of the elevating frame 7a, the elevating mechanism 11, the cylinder device 13 and the components attached thereto are symmetrically arranged about the center in the width direction. Shall be provided.

Further, in the illustrated example, when the rear gate 7 is in the lowered state, the axis of the lifting restraint engagement hole 7g on the rear gate 7 side and the lifting restraint engagement hole of the opening / closing frame 6 side are aligned with each other. Although the pins 9 are engaged with these, it is also possible to configure so that the shafts of the two lifting restraining engagement holes coincide with each other when the rear gate 7 is in the raised state or the intermediate height state.
For that purpose, one of the tongues 7f, 11d may be made long in the up-down direction, and an ascending / descending engagement hole may be opened at the upper end of the tongues 7f, 11d. It can also be projected at the position, and the plate 6c on the rear side of the open / close frame 6,
The rear gate 7 and the gate plate 7b may each be provided with a lifting restraining engagement hole. Further, in the above-described embodiment, the same pin 9 is selectively engaged with either the turning restraining engagement hole or the elevation restraining engagement hole, but either of the two engaging holes is provided. It suffices that the pins are engaged, and the number of pins used may be two or more.

[Effect of device]

As described above, according to the present invention, by selectively inserting a pin into either the turning restraining engagement hole or the raising and lowering restraining engagement hole, the same cylinder device is used to raise and lower and open and close the rear gate. You can select and.
For this reason, it is not necessary to separately install both drive devices for lifting and lowering and opening and closing, so that the number of parts can be reduced and the structure can be simplified.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment showing a lowered state of a rear gate, and FIG. 2 is a side sectional view of an embodiment showing the raised state of the rear gate.
The figure is a side sectional view of the embodiment showing the open state. 1 ... Machine frame, 3 ... Cutter drum, 5 ... Horizontal axis, 6 ...
Opening / closing frame, 6e, 8e ... Engagement hole for turning suppression, 7 ... Rear gate, 7g ... Engagement hole for lifting control, 9 ... Pin, 11 ... Lift mechanism, 13 ... Cylinder device.

Claims (1)

[Scope of utility model registration request] 1. A cutter drum having a cutter bit for scraping road surface on an outer periphery thereof is rotatably attached to a machine frame supported by traveling means, and a cover for preventing scattering of scraped scrap material is provided on the machine frame. A rear gate is attached to the rear part of the machine frame so as to be able to move up and down while being attached to the side part and the front part in the lower part, and the rear gate is pivoted rearward with respect to the machine frame to open and close the rear part of the machine frame. In the scraping device, the upper part of the open / close frame is pivotally attached to the rear part of the machine frame by a horizontal shaft to support the open / close frame so that the open / close frame can be swung rearward, and to suppress the swivel between the machine frame side and the open / close frame side. While providing a turning restraining engagement hole for engaging the pin, the rear gate is installed in the opening / closing frame so as to be able to move up and down, and the pin for suppressing the raising and lowering is engaged with the rear gate side and the opening / closing frame side. Lift control staff A joint hole is provided, and a pin that selectively engages with either the turning restraining engagement hole or the lifting restraining engagement hole is provided, and a pin is provided between the machine frame and the rear gate from the horizontal axis. A lift gate opening / closing mechanism for a raking and unraveling device, characterized in that a cylinder device extending in the up-down direction is installed at the rear.