JPH08169371A - Road surface protection device for crawler type working vehicle - Google Patents

Abstract

PURPOSE: To provide a road surface protection device of which fitting and detaching against a crawler is easy and sure, and operability at changing the course on a curve and the like is favorable after mounting it. CONSTITUTION: This road surface protection device is constituted of a belt-like road surface protection body 2 made of rubber and bolts 3 and nuts 4 as fitting members. The road surface protection body 2 is provided with a windingly mounting part 2A of narrower width than that of a crawler 11, and fixing parts 2B, 2B formed on both ends and having almost same width as that of the crawler 11. Further it is provided with lugs 7 on the outer face side. An opening part 5 is formed by the fixing parts 2B, 2B, and by inserting the bolts 3 at the opening part 5, they arc fixed on the outer circumferential side of the crawler 11. Hereby, a pavement road surface is not injured by elastic force of the road surface protection body 2, and it can be fitted and detached against the crawler 11 easily and surely. Operability at changing the course on a curve and the like is favorable after mounting the road surface protection body 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road surface protection device detachably attached to a crawler track of an endless track type work vehicle.

[0002]

2. Description of the Related Art A large tracked work vehicle such as an excavator or a backhoe has a metal crawler track because it is necessary to support its own weight. In the crawler track type work vehicle provided with such a metal crawler track, there is a problem that the surface of the paved road is damaged when traveling on the paved road or working on the paved road. Particularly, in a vehicle in which the grouser protrudes from one end of the crawler plate that constitutes the crawler belt, the above-mentioned problem is serious because the grouser bites into the paved road surface during traveling. Therefore, a road surface protection device is used to prevent damage to the road surface by attaching a thick rubber elastic body to the surface of the crawler plate which constitutes the crawler belt or at a predetermined interval on the crawler plate. There is.

[0003]

In the conventional road surface protection device described above, a thick rubber elastic body is attached to the surface of each crawler plate constituting a crawler belt or at a predetermined interval on the crawler plate. Since it prevents the road surface from being damaged, the number of mounting brackets increases, so it is very important to attach or remove the road surface protector to or from the track plate that constitutes the track via the mounting bracket. There is a problem that it takes time and labor. Therefore, various road surface protection devices that can be easily attached and detached have been proposed.

Japanese Utility Model Laid-Open No. 55-120583 discloses a road surface protection body which is mounted on the outer peripheral side of a crawler belt and has a plurality of widthwise grooves formed on the outer peripheral surface to form a belt shape with an elastic material.
A hook which fits in the groove of the road surface protection member and which engages with the inner side surface of the crawler belt with the road surface protection member attached at one end, and a flat surface portion which is substantially parallel to the inner side surface of the crawler belt at the other end portion. There is disclosed a road surface protection device in a tracked vehicle comprising a mounting bracket provided with a fixing plate, which is easily fixed to a flat surface portion of the mounting bracket by a bolt and partially abuts an inner side surface of the crawler belt when fixed. There is. However, in the road surface protection device described in the above publication, a plurality of widthwise grooves are provided on the outer peripheral surface of the road surface protection body, hooks are provided here, and the road surface protection body is fixed by bolts through mounting brackets. Therefore, it is possible to reduce the number of mounting brackets relative to the number of crawler plates that make up the crawler belt, but if the belt road surface protection body is wound around the crawler belt, hooks are provided at multiple points and mounting brackets are fastened. However, there is a problem in that the work of mounting and removing it is troublesome. Further, the groove formed in the width direction of the outer peripheral surface of the road surface protection body needs to be provided in accordance with the interval of the grouser, but the interval of the grouser varies depending on the vehicle model even if the track has the same track length. Since it is often the case, there is a problem of poor versatility.

In Japanese Utility Model Laid-Open No. 55-120587, a crawler belt wound around a sprocket and a carrier roller is wound around the outer surface of the crawler belt, and a recessed portion into which a grouser of the crawler belt fits is provided on the back side. A road surface protection device for a tracked vehicle is disclosed, which is formed of a material into a belt shape. In the road surface protection device described in the above publication, since the belt is formed in the annular shape in advance, the belt can be attached and detached without using any tool. However, the annular belt is attached to the crawler belt. There is also a problem that the work is more difficult than winding a belt belt, and that the road surface protection member cannot be firmly attached to the crawler belt. Furthermore, a recess is formed on the back side of the road surface protector where the grouser of the crawler track fits.However, the spacing and shape of the grouser often differ depending on the vehicle model even if the track length is the same. The protection device must be manufactured for each type of tracked work vehicle, and has a problem of poor versatility.

Further, when an elastic body made of a belt formed in a belt shape or an annular shape as described above is wound around a tracked work vehicle, the road surface is not damaged by the elastic force of the road surface protection body, but in comparison with a hard crawler track. Then, since the ground contact area is substantially increased, there is a problem in that the operability when changing the course due to a curve or the like is deteriorated. Therefore, it is conceivable to form a lug on the outer surface side of the belt-shaped elastic body, but since the protective body is formed to have the same width as the crawler belt, the width is too wide for running, and it is also sufficient. There is a problem that it is not possible to obtain proper operability.

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and does not damage the road surface due to the elastic force of the crawler belt, and can be easily and surely attached to and detached from the crawler belt, and after traveling, the course can be curved. It is an object of the present invention to provide a road surface protection device that has good operability when changing. Another object of the present invention is to provide a road surface protection device having excellent versatility.

[0008]

A road surface protection device for a crawler track type work vehicle according to claim 1 of the present invention is equipped with a road surface protection body made of a belt-like elastic body on an outer peripheral side of a crawler track of a crawler track type work vehicle. In the road surface protection device for an endless track type work vehicle, the road surface protection body has a winding portion that is narrower than the crawler belt, and fixed portions that are formed at both ends of the crawler belt and have substantially the same width as the crawler belt. The road surface protection body is fixed to the crawler belt by providing a lug on the side, forming an opening in the fixed portion, and inserting a mounting member into the opening.

Further, in the road surface protection device for a tracked work vehicle according to a second aspect of the present invention, the road surface protection body is a single piece, and the crawler belts are provided at one or two or more intermediate positions of the road surface protection body. A fixed portion having substantially the same width is formed, an opening is formed in the fixed portion, and a mounting member is inserted into the opening to fix the road surface protection body to the crawler belt at a place other than both ends. It has been done.

According to a third aspect of the road surface protection device for a work vehicle of the present invention, a washer plate is provided on a fixed portion formed on the road surface protection body.

[0011]

According to the structure of the first aspect, the road surface protection body made of the belt-shaped elastic body is wound around the crawler belt of the endless track type work vehicle, and the mounting members are provided at the openings of the fixed portions at both ends. By inserting the crawler belt, it can be mounted on the outer peripheral side of the crawler belt, and the number of mounting points by the mounting member can be greatly reduced with respect to the number of crawler plates constituting the crawler belt. Therefore, the road surface protector is easily and reliably fixed to the crawler belt. Further, although there is a lug on the outer surface side of the road surface protective body, since the winding portion of this road surface protective body is narrower than the crawler belt, the ground contact area of the protective body is significantly reduced, so the road surface protective body is attached to the crawler belt. Even after winding, the trackable work vehicle has good operability when changing lanes due to a curve or the like.

According to a second aspect of the present invention, a fixed portion having substantially the same width as that of the crawler belt is formed at one or two or more intermediate portions of the road surface protection body. Since the road surface protector is fixed to the crawler belt at a place other than both ends by forming an opening in the section and inserting a mounting member in the opening, the road surface protector can be more reliably operated in the endless track type work. Can be fixed to the track of the vehicle.

Further, according to the third aspect of the invention, since the washer plate is provided on the fixed portion formed on the road surface protection body, the road surface protection body can be attached to the crawler belt by the attachment member more firmly and reliably. Can be done.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A road surface protection device for a tracked work vehicle according to a first embodiment of the present invention will be described in detail below with reference to FIGS. The road surface protection device 1 according to the first embodiment is mounted on the crawler belt 11 of an endless track type work vehicle.
Is composed of a plurality of metal shoe plates 12 having a grouser 13, and is wound around a sprocket S and a carrier roller (not shown). This road surface protection device 1
Is basically composed of a belt-shaped road surface protection body 2 made of an elastic body such as rubber, and a bolt 3 and a nut 4 as mounting members. The road surface protection body 2 has a winding portion 2A that is narrower than the crawler belt 11 and fixed portions 2B and 2B that are smoothly expanded from the winding portion 2A to substantially the same width as the crawler belt 11 and are formed at both ends.
And the slanted lugs 7 are alternately formed on the outer surface of the road surface protection body 2 within a range not exceeding the center line M. As shown in FIG. 3, the road surface protector 2 is composed of a hard rubber surface layer 21 forming an outer surface and an inner surface, and a core material 22 such as canvas or wire. Also, the road surface protector 2
A washer plate 6 is embedded in the fixed portions 2B and 2B at both ends of the washer plate 2, and two openings 5 are formed in the width direction in the embedded portions of the washer plate 6. An opening 12A is also formed at a position corresponding to the opening 5 of the shoe plate 12, and the bolt 3 is attached to the opening 5 from the outer surface side of the road surface protection body 2.
The road surface protector 2 can be attached to the crawler belt 11 by inserting the tread 12 through the opening 12A and fastening the nut 4 from the inner surface side of the crawler plate 12.

The operation of the above configuration will be described. By laying the belt-shaped road surface protection body 2 on the path of the endless track type work vehicle and advancing the endless track type work vehicle onto the road surface protection body 2, the road surface protection body 2 is placed below the endless track type work vehicle. By laying the road surface protection body 2,
The road surface protector 2 is mounted on the outer peripheral side of the crawler belt 11 by being wound around the crawler belt 11 and inserting the bolt 3 through the opening 5 formed in the fixed portion 2B and fastening the nut 4 from the back side of the crawler plate 12. . During traveling, the opening 12A formed in the crawler plate 12 also rotates with the rotation of the crawler belt 11, and the road surface protector 2 also rotates through the bolt 3, so that the paved road is made of rubber. Since the road surface protection body 2 of 1 comes into contact with the road surface protection body 2, it does not damage the paved road. At this time, the road surface protector 2 has a winding portion 2A that is narrower than the crawler belt 11, and fixed portions 2B and 2B that smoothly expand from the winding portion 2A to approximately the same width as the crawler belt 11 and have an outer surface. Since the lug 7 is provided on the side, the ground contact area of the road surface protector 2 during traveling is greatly reduced compared to the area of the crawler belt 11. Therefore, the operability when changing the course such as the curve of the endless track type work vehicle after the road surface protector 2 is mounted is good. Particularly, in this embodiment, since the lugs 7 are alternately formed in a slanted shape, the climbing ability of obstacles and the like can be maintained high. Moreover, the road surface protector 2 can be securely attached to the crawler belt 11 by fastening the bolt 3 and the nut 4. When the use on a paved road is completed, the nut 4 is removed and the bolt 3 is pulled out, so that the road surface protector 2 can be easily removed.

As described above in detail, the road surface protection device 1 for the endless track type work vehicle of the first embodiment has the winding portion 2A narrower than the crawler belt 12 and the crawler belts 11 formed at both ends. An opening 5 is formed in the fixed portion 2B, 2B of the road surface protection body 2 made of a belt-like elastic body having fixed portions 2B, 2B having the same width and provided with a lug 7 on the outer surface side. Since it is fixed to the outer peripheral side of the crawler belt 11 by inserting the bolts 3 into the part 5, the elastic force of the road surface protection body 2 does not damage the paved road surface and can be easily attached to and detached from the crawler belt 11. And certain. In addition, the operability when changing the course of a curve or the like after mounting the road surface protector 2 is good. Particularly, in the present embodiment, the lugs 7 are alternately formed from both width sides of the road surface protection body 2 in an opposed state, and are formed in a range not exceeding the center line M of the road surface protection body 2. The operability is further improved when the tracked work vehicle changes its course due to a curve or the like after the track protector is wound around the track. Also, since there are two attachment points to the crawler belt 11, the number of attachment points can be greatly reduced with respect to the number of the crawler plates 12 constituting the crawler belt 11, and the road surface protection is performed on the crawler belt 11 by the bolts 3 and the nuts 4. The body 2 can be securely fixed. Moreover, since the washer plate 6 is embedded in the fixed portion 2B at the end of the road surface protection body 2 which is the belt-shaped elastic body, the fastening of the bolt 3 and the nut 4 is firm, and thus the track 11
The road surface protector 2 can be attached to the vehicle more firmly and reliably. Even if the head of the bolt 3 protrudes from the road surface protector 2, since it is lower than the height of the lug 7, it does not actually come into contact with the road surface and thus does not hinder traveling. Moreover, in this embodiment,
Since the road surface protector 2 is composed of the surface layer 21 made of hard rubber and the core material 22 such as canvas or wire,
The elastic force of the surface layer 21 does not damage the road surface, and since it has sufficient strength, it does not easily break, and the hard rubber is also excellent in wear resistance.
Has a long replacement cycle. Further, since the contact surface with the shoe plate 12 is made of rubber, the road surface protector 2 is not easily displaced. Furthermore, since it is not necessary to form irregularities according to the spacing of the grouser 13 on the inner surface side of the road surface protector 2, it is possible to apply to most endless track type work vehicles if only the track length is changed, and the versatility is extremely high. It has become a thing.

Next, a second embodiment of the present invention will be described with reference to FIG. Since the road surface protection device 1 for a tracked work vehicle according to the second embodiment has basically the same configuration as that of the first embodiment, the same members are designated by the same reference numerals and detailed description thereof will be given. Omit it. In the protection device 1 of the second embodiment,
The washer plate 6 is attached to the fixed portion 2B formed at the end of the road surface protector 2.
Are embedded in two rows each, and two openings 5 are formed in the width direction at each washer plate 6, and the track 12 is also opened at a position corresponding to the opening 5A. Department
12A is formed. Then, from the outer surface side of the road surface protector 2, bolts 3 are attached to the openings 5, 5A in the openings 12A of the shoe plate 12.
The nut 4 from the inner surface side of the shoe plate 12.
The road surface protection body 2 can be attached to the crawler belt 11 by fastening. By fixing the road surface protector 2 to the crawler plate 12 at a plurality of locations (two locations) in each fixed portion 2B in this manner, the road surface protector 2 can be attached to the crawler belt 11 more firmly and reliably.

FIG. 5 and FIG. 6 for the third embodiment of the present invention.
Will be described with reference to. Since the road surface protection device 1 for a crawler track type work vehicle according to the third embodiment has basically the same configuration as that of the first embodiment, the same members are designated by the same reference numerals and detailed description thereof will be given. Omit it. In the road surface protection device 1 of the third embodiment, a washer plate 6 is embedded in a fixed portion 2B formed at an end portion of the road surface protection body 2, and an opening 5 is formed therein.
Further, a washer plate 6A is embedded in an intermediate portion of the belt-shaped road surface protection body 2 to form an intermediate fixed portion 2C having substantially the same width as that of the crawler belt 11, which also has an opening. The portion 5B is formed. An opening 12B is formed in the shoe plate 12 corresponding to the opening 5B, and the bolt 3 is attached to the opening 5B from the outer surface side of the road surface protective body 2 by the shoe plate 12 described above.
The intermediate fixed portion 2C of the road surface protector 2 can be fixed to the crawler belt 11 by inserting the nut 4 from the inner surface side of the crawler plate 12 so as to pass through the opening 12B. In this way, by fixing the road surface protector 2 at the intermediate fixed portions 2C other than the fixed portions 2B formed at both ends, the road surface protector 2 can be attached to the crawler belt 11 more reliably.

As described in detail above, the road surface protection apparatus 1 for the tracked work vehicle of the third embodiment has the fixed portion 2C formed in the middle of the road surface protection body 2 made of a belt-shaped elastic body.
By embedding the washer plate 6A and providing two openings 5B, inserting the bolts 3 into the openings 5B, and fastening and fixing the nuts 4, the road surface protection body 2 which is the belt-like elastic body is end-mounted. Since it is fixed to the crawler belt 11 other than the fixed portion 2B of the section, the road surface protection body 2 can be more surely attached to the crawler belt 11 of the tracked work vehicle.

A fourth embodiment of the present invention will be described with reference to FIG. Since the road surface protection device 1 for a tracked work vehicle of the fourth embodiment has basically the same configuration as that of the first embodiment, the same members are designated by the same reference numerals and detailed description thereof will be given. Omit it. In the road surface protection device 1 of the fourth embodiment, the road surface protection body 2 is 1/4 of that of the first embodiment.
It is formed to have a length of 4 and is configured to be continuously attached to the crawler belt 11. In this way, the road surface protection body 2 can be divided into a plurality of pieces and attached to the crawler belt 11,
If the number of divisions is too large, the workability when attaching the road surface protective body 2 to the crawler belt 11 is reduced.
It is preferably 5.

As described in detail above, the road surface protection device 1 for the tracked work vehicle according to the fourth embodiment is provided with the road surface protection body 2.
Since there are four tracks for the crawler track 11 of the tracked work vehicle, the road surface protection body 2 can be more reliably attached to the tracked track 11 of the tracked work vehicle.

FIG. 8 and FIG. 9 regarding the fifth embodiment of the present invention.
Will be described with reference to. Since the road surface protection device 1 for a tracked work vehicle of the fifth embodiment has substantially the same configuration as that of the first embodiment, the same members are designated by the same reference numerals and detailed description thereof is omitted. In the fifth embodiment, a washer plate 6 is embedded in the end portion 2B of the road surface protector 2.
Two openings 5 are formed in the width direction, respectively. Further, the mounting member 30 has a rod-shaped insertion member 31 having a hexagonal head 32 at the base end, and a flat rod-shaped stopper member 33 pivotally mounted in a slit 34 formed at the tip of the insertion member 31.
And a coil spring 35, which is an elastic member provided so as to be locked to the hexagonal head portion 32 at the base end of the insertion body 31.

The operation of the above configuration will be described. First, with the stopper member 33 in the same direction as the rod-shaped inserter 31, the outer surface of the road surface protector 2 is compressed into the opening 5 from the stopper member 33 side against the elastic force of the coil spring 35. At least the opening of the track 12
Insert 12A until the stopper member 33 penetrates. Then, when the stopper member 33 is rotated so as to be substantially orthogonal to the insertion body 31 as shown by a chain line in FIG.
Release 30. Then, the mounting member 30 is stopped when the stopper member 33 comes into contact with the track 12 in a pressed state by the restoring force of the coil spring 35, and the stopper member 33 is rotated by the pressing force by the restoring force of the coil spring 35. In this state, the road surface protection body 2 can be fixed to the shoe plate 12. When removing the road surface protection device 1, the hexagonal head 32 is pressed to compress the coil spring 35 against its elastic force, and the stopper member 33 is inserted.
It only has to be rotated in the same direction as. In the present embodiment, the hexagonal head portion 32 projects, but since the projecting height is lower than the height of the lug 7, it does not come into contact with the ground and does not hinder traveling.

As described in detail above, in the road surface protection device 1 for a tracked work vehicle of the fifth embodiment, the attachment member 30 is rotatably attached to the rod-shaped insert 31 and the tip of the insert 31. A stopper member 33 and a coil spring 35 provided at the base end of the insertion body 31.
By inserting the mounting member 30 into the opening 5 against the elastic force of the coil spring 35 and rotating the stopper member 33 with 33 in the same direction as the rod-shaped inserter 31. Since the road surface protection body 2 which is the belt-like elastic body is fixed to the crawler belt 11, the work of inserting the attachment member 30 into the opening 5 of the end 2B of the road surface protection body 2 and fixing it to the crawler belt 11 is performed. Very easy to do. It is also easy to remove the road surface protector 2.

Further, a sixth embodiment of the present invention will be described with reference to FIG. Since the road surface protection device 1 for a crawler track type work vehicle of the sixth embodiment has basically the same configuration as that of the first embodiment, the same members are designated by the same reference numerals and detailed description thereof will be given. Omit it. The protection device 1 of the sixth embodiment is
The structure is the same as that of the first embodiment except that a fitting lug 8 that can be fitted into the space between the grousers 13 of the shoe plate 12 is provided on the inner surface side of the road surface protector 2. By adopting such a structure, since the fitting lug 8 is fitted to the grouser 13, the crawler belt 11
It is possible to reliably prevent the road surface protection body 2 wound around the vehicle from shifting.

Although the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, but various modifications can be made within the scope of the gist of the present invention. For example, in the third embodiment, the road surface protective body 2 is fixed to the crawler belt 11 at three places, one at the end 2B and at the intermediate attachment 2C, but at two or more places at the intermediate attachment 2C. It can also be fixed. However, if there are too many fixing points, the workability at the time of attaching / detaching the road surface protection device 1 is deteriorated, which is not preferable. Further, in the sixth embodiment, the fitting lug 8 does not have to be provided corresponding to all the grousers 13.
As shown in FIG. 11, it is possible to appropriately change the number to be formed, such as forming every other one or every two.

[0027]

According to the road surface protection device for a crawler track type work vehicle of claim 1 of the present invention, a crawler track type work vehicle is equipped with a road surface protection body made of a belt-like elastic body on the outer peripheral side of the crawler track. In the road surface protection device for a work vehicle, the road surface protection body has a winding portion that is narrower than the crawler belt and a fixed portion that is formed at both ends and has substantially the same width as the crawler belt, and has a lug on the outer surface side. Since the road surface protection body is fixed to the crawler belt by forming an opening in the fixed portion and inserting a mounting member into the opening, the road surface protection made of the belt-shaped elastic body is provided. By winding the body around the crawler track of the tracked work vehicle and inserting the mounting member into the openings formed in the fixed portions at both ends, the crawler belt can be mounted on the outer peripheral side of the crawler track to form the crawler track. Larger number of mounting points with mounting members compared to the number of track plates It can be reduced to. Therefore, the road surface protector is easily and reliably fixed to the crawler belt.
Further, although there is a lug on the outer surface side of the road surface protective body, since the winding portion of this road surface protective body is narrower than the crawler belt, the ground contact area of the protective body is significantly reduced, so the road surface protective body is attached to the crawler belt. Even after winding, the trackable work vehicle has good operability when changing lanes due to a curve or the like.

Further, in the road surface protection device for a crawler track type work vehicle according to a second aspect of the present invention, a fixed portion having a width substantially the same as that of the crawler belt is formed at one or more places in the middle of the road surface protection body. Since the opening is formed in the fixed portion and the mounting member is inserted into the opening, the road surface protection body is fixed to the crawler belt at a place other than both ends, so that the road surface protection is performed. The body can be more reliably fixed to the crawler tracks of the tracked work vehicle.

Further, in the road surface protection device for a crawler track type work vehicle according to a third aspect of the present invention, since the washer plate is provided on the fixed portion formed on the road surface protection body, the road surface to the crawler belt by the mounting member. The protective body can be attached more firmly and surely.

[Brief description of drawings]

FIG. 1 is an enlarged perspective view of essential parts showing a road surface protection device for a crawler track type work vehicle according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a road surface protection body of the road surface protection device of the first embodiment.

FIG. 3 is a cross-sectional view showing a road surface protection body of the road surface protection device of the first embodiment.

FIG. 4 is an enlarged perspective view of essential parts showing a road surface protection device for a crawler track type work vehicle according to a second embodiment of the present invention.

FIG. 5 is a perspective view showing a road surface protection device for a tracked work vehicle according to a third embodiment of the present invention.

FIG. 6 is a plan view showing a road surface protection body of the road surface protection device of the third embodiment.

FIG. 7 is a perspective view showing a road surface protection device for a tracked work vehicle according to a fourth embodiment of the present invention.

FIG. 8 is an enlarged exploded perspective view of essential parts showing a road surface protection device for a tracked work vehicle according to a fifth embodiment of the present invention.

FIG. 9 is a cross-sectional view showing a road surface protection body of the road surface protection device of the fifth embodiment.

FIG. 10 is an enlarged perspective view of essential parts showing a road surface protection device for a crawler track type work vehicle according to a sixth embodiment of the present invention.

FIG. 11 is an enlarged perspective view of essential parts showing a road surface protection device for a crawler track type work vehicle according to a seventh embodiment of the present invention.

[Explanation of symbols]

 1 Road surface protection device 2 Road surface protection body 2B Fixed part 2C Intermediate fixed part (intermediate part) 3 Bolt (mounting member) 4 Nut (mounting member) 5,5A, 5B Opening 6,6A Washer plate 7 Lug 11 Track

Claims (3)

[Claims] 1. A road surface protection device for a tracked work vehicle in which a road surface protection body made of a belt-shaped elastic body is mounted on the outer peripheral side of the tracked track of the tracked work vehicle, wherein the road surface protection body is more than the crawler track. It has a narrow winding part and a fixed part formed at both ends at the same width as the crawler belt, and is provided with a lug on the outer surface side, an opening is formed in the fixed part, and the fixed part is attached to the opening. A road surface protection device for a tracked work vehicle, wherein the road surface protection body is fixed to the crawler belt by inserting a member. 2. The road protection body is one sheet, and a fixed portion having a width substantially the same as that of the crawler belt is formed at one or two or more intermediate portions of the road protection body. The infinity according to claim 1, wherein the road protection body is fixed to the crawler belt at a place other than both ends by forming an opening in the fixed portion and inserting a mounting member into the opening. Road surface protection device for track-type work vehicles. 3. A washer plate is provided on a fixed portion formed on the road surface protector.
Road protection device as described.