JPH083448Y2 - Road scraping device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention is supported by a traveling means such as a vehicle to scrape off road surfaces such as asphalt pavement for other purposes, and is attached to the left and right sides of a machine frame to remove waste materials. At least one of the left and right side covers that prevent scattering is attached to the machine frame so as to be able to move up and down, and a level sensor that detects the height position of the moving side cover is provided to scrape from the height position of the side cover. The present invention relates to a road surface scraping and disassembling device for reading the disentangling depth.

[Conventional technology]

As a conventional road surface scraping device for raising and lowering a side cover, there is, for example, one described in Japanese Utility Model Laid-Open No. 59-1714. Here, when the height position of the side cover with respect to the machine frame supporting the cutter drum is detected, it is possible to read the raveling depth by the cutter bit provided in the cutter drum. Therefore, a device provided with a level sensor for detecting the height position of the side cover is proposed, for example, as described in Japanese Utility Model Laid-Open No. 59-1714.

[Problems to be solved by the device]

However, when the height position of the side cover with respect to the machine frame is detected, since the relative height position of the cutter drum with respect to the machine frame is fixed, the scraping depth can be read from the detected value, but the cutter bit If the side covers are worn at the same height,
The depth of scraping becomes shallow. Therefore, the actual scraping depth becomes shallower than the reading depth. Further, if the lower end of the side cover is in sliding contact with the road surface and wears, the height position of the side cover is lowered by the amount of wear, so that the reading depth becomes shallow even if the depth of the cutter bit is the same.

Thus, the above-mentioned conventional technique has a problem that the detection value of the level sensor has an error due to wear of the cutter bit or the side cover.

The purpose of this invention is to make the detection value of the level sensor accurate even if the cutter bit or the side cover is worn.

[Means for solving the problem]

The road scraping device of the present invention rotatably supports a cutter drum having a cutter bit for scraping the road surface on a machine frame, supports the machine frame on a traveling means, and scatters scraped scrap materials. A side cover for preventing the above is provided on a side portion of the machine frame, and at least one of the side covers is attached to the machine frame so as to be able to move up and down, and one end of the strip is connected to the side cover. In addition, the other end is connected to the machine frame side, and a moving pulley is engaged with a middle part of the strip, and the moving pulley is attached to the advancing / retreating member so that the advancing / retreating member advances / retreats in conjunction with the elevation of the side cover. While connecting a level sensor for detecting the height position of the side cover with respect to the machine frame to the advancing / retreating member, the structure for attaching the end of the strip body to the machine frame is a screwing machine of a male screw and a female screw. Using one of the screws, one of the screws is fixed to the end of the strip and the rotation of the screw is stopped so that the screw can move forward and backward, and the other handle of the screws is attached and rotatably positioned with respect to the device frame. Become.

Here, the strip is a general term for wires, wire ropes and other ropes, cords, belts, etc. The extension direction is variable by a pulley or the like due to its low elongation and flexibility, and the movement of one end is reciprocated. A long material that can be transmitted to the other end by.

[Action]

With the change in the depth of scraping by the cutter drum,
When the side cover moves up and down with respect to the machine frame, the advancing / retreating member advances and retracts, and the level sensor detects the height position of the side cover with respect to the machine frame based on the amount of advance / retreat. At this time, when the relative relationship between the scraping depth and the height position of the side cover with respect to the machine frame collapses due to wear of the cutter bit provided on the cutter drum, etc., the relative relationship is adjusted by adjusting the length of the strip. To recover.

To do so, rotate the handle. As a result, the screw rotates together with the handle, and the screw fixed to the end of the strip and stopped in rotation so that it can move forward and backward with respect to the machine frame advances and retracts the end of the strip in the longitudinal direction. Therefore, the length of the strip is substantially adjusted. As a result, the relative relationship between the scraping depth and the height position of the side cover with respect to the machine frame is restored, and the above relative relationship is normally maintained, thereby maintaining the accuracy of the level sensor.

In the screwing mechanism using the screw, any one of the screw rotatably positioned with respect to the machine frame and the screw fixed to the end of the strip may be a male screw.

〔Example〕

FIG. 1 and the following figures show an embodiment of the present invention. FIG. 1 is a left side view and FIG. 2 is a sectional view taken along the line II-II of FIG. This scraping and disassembling device is forward in the left direction in FIGS. 1 and 2, and is suspended on a traveling vehicle by a suspension device (not shown) as described in, for example, Japanese Utility Model Publication No. Sho 60-27112, and its traveling. The height position relative to the vehicle is adjustable by the suspension device.

The machine frame 1 rotatably supports a cutter drum 3 provided with a cutter bit for scraping the road surface on the outer periphery, and a rotary drive source (not shown) is connected to the cutter drum 3. In FIGS. 1 and 2, the chain line showing the cutter drum 3 indicates the rotation locus of the tip of the cutter bit. Cutter drum 3
A hydraulic motor is usually used as the rotary drive source of the, but the rotary drive source and the cutter drum 3 are directly connected to each other, or via a power transmission mechanism using a rotary drive shaft, a chain, a gear, or the like. Be connected.

Covers (not shown) are attached to the front and rear of the lower portion of the machine casing 1, and the left and right sides of the machine casing 1 show only the left side in the drawing, but side covers 5 for preventing scattering of scrapped scrap materials.
Is attached.

The front end of the side cover 5 is connected to the front end of the machine frame 1 and a vertical axis 7 that is vertically fixed to the bracket 2 fixed to the front end. The vertical axis 7 is vertical with its upper end fixed to the bracket 2 via a small bracket 7a and its lower end fixed to the machine frame 1 via a small bracket 7b. This vertical axis 7
As shown in FIG. 3, a cylindrical body 8 having a sliding bush 8a on the inner surface and caps 8b on the upper and lower end surfaces is externally fitted so as to be rotatable in the axial direction and slidable in the axial direction. The box 4 is fixed to. A horizontal shaft 6 is horizontally fixed in the box body 4, and a triangular plate 9 fixed to the front end of the upper portion of the side cover 5 is fitted onto the box body 4 via a boss 9a. A slide bush is arranged on the inner surface of the boss 9a, so that the plate 9 is rotatable about the horizontal axis 6. With this configuration, the side cover 5 is configured to be tiltable up and down about the horizontal axis 6, and the vertical axis 7
It is configured so that it can be opened and closed to the left and right around the center, and can be moved up and down along the vertical axis 7.

Further, a sliding surface 10 is formed on the outer surface of the rear end of the side cover 5 so as to extend vertically, and the side cover 5 is opened by pressing the sliding surface 10 from the outside via a bracket 1a fixed to the machine frame 1. It suppresses turning in any direction. The sliding surface
10 is a plate body having a smooth surface to reduce frictional resistance, and the surface of the pressing member 11 facing the plate body also has reduced frictional resistance.

At the lower end of the side cover 5, a rubber plate that is in sliding contact with the road surface Ra
12 is replaceably attached to close the inside and outside of the side cover 5.

A front bracket 13 is fixed to the front end of the lower portion of the side cover 5 toward the front, and a caster 14 is attached to the lower side of the front bracket 13. That is, the vertical axis 15 is fixed to the front bracket 13, and the arm 16 is pivotally attached to the vertical axis 15 via the boss 16a fitted onto the front bracket 13, and the arm 16 is supported so as to be pivotable right and left. This turning is performed within a predetermined angle, and a stopper (not shown) is provided on the front bracket 13 in order to prevent turning beyond that angle.
And the arm 16 are formed. Further, in order to maintain the angle at which the arm 16 pivots outward in the width direction within the above angle, that is, the position where the caster 14 is outside the side cover 5, a pin is inserted into a small hole formed in the front bracket 13 and the arm 16. 17 is detachably inserted. The pin 17 is connected to the front bracket 13 by a chain or the like (not shown) to prevent loss when not in use.

At the lower rear end of the side cover 5, a rear bracket 18
Is fixed toward the rear, and casters 19 are attached to the lower side of the fixed. That is, the vertical axis 21 is fixed to the rear bracket 18, and the arm 22 is pivotally attached to the vertical axis 21 via the boss 22a fitted onto the rear bracket 18, and the arm 22 is supported so as to be pivotable right and left.
This turning is performed within a predetermined angle, and a stopper (not shown) is formed between the rear bracket 18 and the arm 22 to prevent the turning over the predetermined angle. Also the arm
In order to maintain the angle at which 22 is swung outward in the width direction within the angle, that is, the position where the caster 19 is outside the side cover 5, the pin 23 is attached / detached to / from a small hole formed in the rear bracket 18 and the arm 22. It fits freely. The pin 23 is connected to the rear bracket 18 by a chain or the like (not shown) to prevent loss. Both casters 14 and 19 are positioned on the extension line of the side cover 5 when the arms 16 and 22 are pivoted inward. Further, it is adjusted in advance so that the lower edge of the rubber plate 12 contacts the road surface Ra when both casters 14 and 19 are on the horizontal road surface.

To the upper end of the side cover 5, one end of a strip 26 made of a wire rope is connected above the center line of the cutter drum 3. A midway portion of the strip 26 is a sheave 28 of a bracket 27 attached to the machine frame 1, a sheave 31 of the bracket 29, a sheave 33 of the bracket 32, and a sheave 35 as a movable pulley of an advancing / retreating member 34 described later. , And the other end is connected to a handle 36 described later.

The bracket 2 fixed to the front of the machine casing 1 has a first
As shown in FIGS. 5 and 8, a vertically long rectangular tube 37 is fixed, and as shown in FIG. 8, a rectangular block 38 is housed therein so as to be able to move up and down, and a screw rod 39 is screwed from below to fix it. Has been done. The end portion of the strip 26 is connected to the screw rod 39, and
The strip 26 is connected to the corner block 38 via 39. Since the square block 38 has a similar cross-section to the square tube 37, it can be moved up and down but cannot be rotated. This corner block 38
A bolt shaft 41 is penetrated through the bolt shaft 41, and both ends of the bolt shaft 41 are exposed to the outside from the long hole 37a of the rectangular tube 37. Therefore,
The square block 38 can be moved up and down by the length dimension of the long hole 37a.

Similarly, as shown in FIG. 8, a screw groove 38a is formed in the center hole of the square block 38, and this square block 38 constitutes a female screw used in the present invention. The screw groove 38a of the square block 38 has a vertical axis 42 formed with a screw groove 42a on the outer periphery.
Are screwed together, and the vertical axis 42 constitutes the male screw used in the present invention. The upper end of the vertical axis 42 projects above the rectangular tube 37, and the handle 36 is fixed to this. Handle 36
Is a disc 36a fixed to the vertical axis 42 and a knob 36b fixed on the disc 36a.
The notch 36c is formed at every 45 degrees. Thus,
When the knob 36b is pivotally moved, the disk 36a is rotated, and the vertical axis 42 is rotated integrally with the disk 36a, whereby the angular block 38 is moved up and down, and the length of the strip 26 is substantially changed. It is designed to let you.

A bracket 45 and a pivot 45a are provided on the upper surface of the upper plate 43 of the rectangular tube 37.
The stopper 44 is rotatably and pivotally attached by means of, and the stopper 44 engages with the notch 36c of the disc 36a to stop the rotation of the disc 36a. A lock mechanism of the handle 36 is configured by the notch 36c of the plate 36a.

The advancing / retreating member 34 moves up and down due to the change in the substantial length of the strip 26. As shown in FIG. 7, the advancing / retreating member 34 is configured to advance / retreat by being guided by a plate-shaped rail 48 fixed via a base 47 to a reinforcing plate 46 fixed to the front surface of the machine frame 1. There is. That is, a pair of slide contact blocks 49 that individually embrace the left and right sides of the plate-shaped rail 48 and are in sliding contact with each other.
And the front plate 51 fixed between these front faces constitute the advancing / retreating member 34, and the sheave 35 as the movable pulley is supported on the front plate 51. Thus, the advancing / retreating member 34 is in a state of being suspended by the strip 26 while being guided by the plate-shaped rail 48, and is lowered by the spring 52 shown in FIG. 5 in order to maintain the strip 26 at a constant tension. Is urged by. The spring 52 is a tension spring installed between a bracket 53 protruding from the reinforcing plate 46 and one end of a lever 54 swingably provided on the plate 46.
The other end of is connected to the lower part of the advancing / retreating member 34.

A horizontal bar 55 is projectingly provided on the front surface of the advancing / retreating member 34, and this engages with the level sensor 56 as follows. That is, the level sensor 56 is a rotational position sensor that outputs a pulse corresponding to the rotation angle of the shaft 56a, a return spring (not shown) is provided on the shaft 56a, and the swing arm 57 is fixed to the tip of the swing arm 57. A horizontal bar 58 is fixed to this, and the horizontal bar 58 lightly presses the horizontal bar 55 from above by the biasing force of the return spring. Thus, the vertical movement amount of the advancing / retreating member 34 is detected by the level sensor 56 via the horizontal bar 55, the horizontal bar 58, and the turning arm 57.

Thus, the road surface raveling device unravels the road surface Ra in a known manner by rotating the cutter drum 3 while moving the road surface Ra in the forward arrow direction integrally with the traveling vehicle. Rb shows low and flat road surface after being scraped. At this time, the scrapped road scraps are prevented from being scattered to the outside by the left and right side covers 5 and front and rear covers (not shown), and are conveyed to the outside by a conveying device (not shown).

Here, the side cover 5 rises with respect to the machine frame 1 in proportion to the scraping depth. That is, within the width dimension of the cutter drum 3, the road surface Ra is scraped and the waste material is discharged, so the road surface Rb is low, and accordingly, the cutter drum 3 and the machine casing 1 are also at low positions. Although the side cover 5 is close to the scraped road surface Rb, the uncovered road surfaces Ra on both sides of the side cover 5 move while touching this road surface by their own weight. Is in a higher position than when it is not scraped. Thus, the lifting and lowering of the side cover 5 with respect to the machine frame 1 is performed by the change in the raking depth.

The raising and lowering of the side cover 5 is performed by sliding the tubular body 8 in the axial direction with respect to the vertical axis 7 at the front end portion, and at the rear end portion, the sliding surface 10 moves up and down with respect to the pressing member 11. It is performed by sliding. Here, since the side cover 5 is attached to the machine casing 1 by the vertical axis 7 only at the front end portion, when the side cover 5 is attached to the machine casing 1 by the vertical bar shaft and the cylinder body 8 both in the front and rear. Compared with the above, smooth ascent and descent can be performed without increasing the accuracy of the parallelism between the longitudinal axis 7 and the cylindrical body 8 both in the front and rear.

Here, the side cover 5 includes the rubber plate 12 and the casters 14,1.
The situation of the road surface Ra that is in contact via 9 and the cutter drum 3
Depending on the relative factors such as the condition of the road surface Rb after being unraveled by, the side cover 5 tilts with respect to the machine frame 1 due to a difference in height between the front and rear. At this time, the side cover 5 is tilted about the horizontal axis 6 in the directions of arrows a and b in FIG. 1 so that the side cover 5 has a posture corresponding to the road surface Ra in contact with the side cover 5 and the road surface Ra. There is no gap in In this way, the posture of the side cover 5 is Ra
The level sensor 56 can accurately follow the inclination of the actual road surface.
Since the Ra height can be detected, the raking depth of the cutter drum 3 controlled based on this can be accurately controlled. Even when the side cover 5 tilts, sliding occurs between the sliding surface 10 and the pressing member at the rear end of the side cover 5.

At the rear end of the side cover 5, if the pressing member 11 is released from the sliding surface 10, the side cover 5 pivots about the vertical axis 7 toward the left outside in the direction of arrow c in FIG. Can be opened. Holding member 11
The bracket 1a of the pressing member 11 may be removed from the machine frame 1 in order to release the pressing of the pressing member 11. This is done, for example, by removing bolts and nuts (not shown) that fix the bracket 1a to the machine frame 1. If the means for fixing the bracket 1a to the machine frame 1 is replaced with the bolts and nuts and a fixing means that is more easily attached and detached is adopted, the opening of the presser becomes easier.

Thus, when the side cover 5 is pivoted outward about the vertical axis 7 as described above, a person with a tool can laterally put his / her hand inside the road surface scraping device, so that the road surface scraps, etc. Adhesion and clogging can be easily removed. In particular, waste materials and the like that are jammed between the side cover 5 and the machine frame 1 can be naturally dropped and removed only by opening the side cover 5 by the turning. When the side cover 5 is closed, the pressing by the pressing member 11 may be performed again in the reverse order of the above-mentioned opening.

The casters 14 and 19 rotate the arms 16 and 22 to the outside, fix this state with the pins 17 and 23, and roll on the road surface outside the side cover 5. In this state, the vehicle is allowed to travel when there are no obstacles such as utility poles or moats on the side of the road to be scraped. As a result, the casters 14 and 19 are attached to the cutter drum 3.
As a result, it is possible to roll on the road surface Ra that is not unraveled at a position distant from the road surface Rb that is unraveled. Therefore, even if a small piece of waste material rides on the shoulder of the road surface Ra due to the disentanglement of the cutter drum 3, the casters 19 do not have to roll on the waste material, and the side cover 5 on the road surface Ra at the running destination. Since the caster 14 does not have to roll on the mark provided for copying, the casters 14 and 19 can travel on the road surface Ra at an accurate height. Therefore, the measurement error of the level sensor can be minimized.

If there is an obstacle on the roadside, pull out the pins 17 and 23. When running in this state, the casters 14 and 19 will be
Therefore, the casters 14 and 19 do not project outward from the side cover 5 because they are pulled behind and roll behind them. Therefore, interference with the obstacle can be avoided.

As the side cover 5 moves up and down, the tension of the strip 26 increases and decreases, which causes the advancing and retracting member 34 to move up and down.
55 moves up and down together to raise and lower the horizontal bar 58. As a result, the revolving arm 57 revolves and the rotation angle of the shaft 56a is detected by the level sensor 56.
To detect. Therefore, the rotation angle detected by the level sensor 56 appears corresponding to the ascending / descending distance of the side cover 5.

If an error occurs in the height position of the side cover 5 with respect to the machine frame 1 due to wear of the cutter bit of the cutter drum 3, wear of the lower ends of the side cover 5 and casters 14, 19, the detected value by the level sensor 56 will also be detected. There is an error. Therefore, the error is absorbed by changing the substantial length of the strip 26.

The actual length of the strip 26 is changed by rotating the handle 36. This is done by turning the stopper 44 shown in FIG. 8 to remove it from the notch 36c of the disc 36a, and then turning the knob 36b. Thus, as the handle 36 rotates, the male screw longitudinal axis 42 rotates, causing the female screw angular block 38 to move up and down to change the substantial length of the strip 26. Here, if the relative relationship between the number of revolutions of the disc 36a and the detected value of the height position of the side cover 5 is known in advance, for example, when the wear amount of the cutter bit is 5 mm, the disc 36a is rotated two and a half times. You can adjust it just by letting it work. Thus, for example, when the cutter bit wears, the actual scraping depth becomes shallower than the detected value, so that the actual length of the strip 26 is shortened to make the detected value deeper, and thus the detected value and the actual value. And then use this as a reference point to start the scraping operation.

Although only the side cover 5 on the left side in the traveling direction is described in the above embodiment, the side cover on the right side in the traveling direction has the same configuration.
However, since the side cover on the right side has a driving device for driving the cutter drum 3 therein, the side cover is formed by bulging the central portion outward in order to avoid interference with the driving device. The strip 26 is the left side cover 5
Is only connected to and the scraping depth of the cutter drum 3 is detected only from now on.

[Effect of device]

As described above, according to this invention, when the relative relationship between the scraping depth and the height position of the side cover with respect to the machine frame is broken due to wear of the cutter bit provided on the cutter drum, the handle is rotated. By doing so, the relative relationship can be restored by adjusting the substantial length of the strip. This has the effect of enabling accurate control of the raveling depth.

Further, according to this invention, the moving pulley is engaged with the midway portion of the strip, the moving pulley is attached to the advancing / retreating member, the advancing / retreating member is advanced / retreated in conjunction with the elevation of the side cover, and the advancing / retreating member is leveled. Since the sensors are connected, the displacement input to the level sensor can be half the displacement of the side cover. Therefore, the level sensor can be made compact, and the level sensor can be easily arranged.

[Brief description of drawings]

FIG. 1 is a left side view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is an enlarged sectional view taken along line III-III of FIG. 1, and FIG. 1 is an enlarged sectional view taken along line IV-IV of FIG. 1, FIG. 5 is an enlarged front view of the embodiment, FIG. 6 is a plan view of FIG. 5, and FIG. 7 is enlarged sectional view taken along line VII-VII of FIG. 8 and 9 are enlarged cross-sectional views taken along the line VIII-VIII in FIG. Ra: Road surface that is not unraveled, Rb: Road surface after being unraveled, 1 ... Machine frame, 3 ... Cutter drum, 5 ... Side cover, 26 ... Article, 34 ... Advance member, 36 ...... Handle, 36a ...... Disc, 36b ...... Knob, 36c ...... Notch, 38
…… Square block (female screw), 42 …… Vertical axis (male screw), 44
...... Stopper, 48 …… Plate rail, 56 …… Level sensor.

Claims (1)

[Scope of utility model registration request] 1. A side for rotatably supporting a cutter drum having a cutter bit for scraping road surface on a machine frame so that the machine frame is supported by a traveling means and preventing scattering of scraped scrap materials. In a road surface disentangling device in which a cover is provided on a side portion of the machine frame and at least one of the side covers is attached to the machine frame so as to be able to move up and down,
One end of the strip is connected to the side cover and the other end is connected to the machine frame side, and a moving pulley is engaged in the middle of the strip, and the moving pulley is attached to the advancing / retracting member to move the side cover up and down. The advancing / retreating member is configured to advance / retreat in conjunction with, and while the level sensor for detecting the height position of the side cover with respect to the machine frame is connected to the advancing / retreating member, the structure for mounting the end of the strip on the machine frame is , Using a screwing mechanism of male and female screws, one of both screws is fixed to the end of the strip, and rotation is stopped so that it can move forward and backward with respect to the machine frame, and a handle is attached to the other of the both screws and the machine frame. A road surface scraping device characterized by being rotatably positioned with respect to.