JP3027143U - Track protection device for endless track - Google Patents

Abstract

(57) [Abstract] [Problem] In an attachment rubber that protects the road surface by attaching it to a metal shoe of the grounding part that constitutes an endless track of construction machinery etc. that is severely worn or damaged by vibration, friction, etc. It can be easily attached and detached to and replaced easily. A cross section in which a core metal 3 is embedded and inserted through an attachment rubber 1 having super strong vibration resistance, and a tongue-shaped bent portion 5a for receiving an edge of a shoe 2 is provided at one end thereof at a lower end thereof. Attach the L-shaped stopper plate 5 so that its outer surface is aligned with the end surface of the attachment rubber 1.
Further, the bent portion 5a is fixed so as to face inward, and a tongue-shaped bent portion 5a 'for receiving the edge of the shoe 2 is provided at one end of the core metal 3 on the other end to form an entire L-shaped section. Secure the stopper plate 5'by welding or the like.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention is an attachment rubber that protects the road surface by attaching it to the metal shoe of the grounding part that constitutes an endless track of construction machinery etc. that is severely worn and damaged by vibration, friction, etc. The present invention relates to a road surface protection device for an endless track, which is mainly made of attachment rubber that can be easily installed and replaced.

[0002]

[Prior art]

 The conventional technique will be described with reference to the endless track 30 shown in FIG. 9. When a heavy construction machine equipped with the endless track 30 made of metal is traveling on a paved road, a heavy object scratches and damages the road surface. Therefore, the ring-shaped rubber 31 having the protruding portion 32 protruding to the outside is wound around the periphery of the blade of the rotating portion in contact with the road surface of the endless track 30 on both sides, and the rubber ring 31 is attached. Via the track, the endless track 30 is moved in contact with the road surface to protect the road surface.

[0003]

[Problems to be solved by the device]

 Therefore, in the conventional road surface protection device of this kind of endless track, an abnormally large pressure is applied to the rubber ring 31 in all directions such as vertical and horizontal directions in order to move a heavy construction machine etc. Also, because the movement is heavy, fragments of metal or ceramics, pottery such as glass, iron shoulders, old nails, stone fragments, and other foreign materials scattered at the construction site are sandwiched between the rubber rings 31. It is severely damaged, and sometimes the rubber ring 31 is cut and damaged, which is a dangerous situation for workers on site.

Once the rubber ring 31 is cut, the heavy equipment itself becomes unusable, and the entire rubber ring 31 must be replaced and replaced. To replace the rubber ring 31 with a new one, parts cost, replacement cost, and transportation cost are required. It becomes expensive. In addition, repairing the cut rubber ring 31 by connecting and repairing it requires strength that can withstand particularly strong tensile stress. Therefore, a facility for towing and repairing rubber, which is installed at a rubber factory, has been constructed. It is not possible at the construction site, but for repairing the rubber ring 31, it costs to transport the expensive construction machinery back to the factory, the transportation time, the round trip time, the waiting time to replace the rubber ring 31, the cost, etc. , Which would result in a huge loss as a whole. Further, even if the damage is made at one place, the entire rubber ring 31 is replaced, which is economically disadvantageous.

In order to attach the rubber ring 31 to the endless track portion 30 of the construction machine, conventionally, nuts and bolts have been used for tightening and fastening, but this ring-shaped road surface protection device is 90 There is also an accident in which the road surface protection device suddenly disengages from the heavy machinery crawler track 30 due to the endless track rotation motion in all directions such as 180 degrees and 180 degrees. In addition, the bolts used for fastening and fixing may cause troubles such as loosening and detachment of the bolt screw part because a particularly strong vibration is continuously transmitted to the bolt part when the machine is operating. There were many problems.

[Problems to be solved by the device]

Therefore, an external view of one side in which the attachment rubber 1 is attached to a part of the endless track of the prior application of FIG. 12, a plan view of the attachment rubber main body of the conventional example of FIG. 13, and the attachment rubber main body of FIG. In the side view showing a partially cutaway cross section of FIG. 15 and the same sectional view of the attachment rubber main body of FIG. 15, insert a core metal 23 into which the bolts 27 are fixed at right angles to both ends of the attachment rubber 1 main body. Then, the shoe 2b is inserted into the mounting hole 2a (FIG. 12) and is tightened and fixed by the nut 28. Although this method has made progress in that the attachment rubber has become individual, it requires a lot of time and labor to move the endless track little by little when attaching and detaching, and to loosen and tighten the nut. Needed

In addition to the conventional example, there are prior application examples shown in FIGS. 10 and 11. FIG. 10 is a perspective view of the crawler blade cover of the previous application, FIG. 11 is a sectional view taken along the line AA of FIG. 10, and FIG. 12 described above is a road surface in which an attachment rubber is attached to a part of the endless track of the previous application. It is an external view of one side of the protection device. Further, FIG. 16 is a plan view in which the attachment rubber main body of the prior application example and a core metal are inserted into the main body, and nuts are fixed to both ends thereof, FIG. 17 is the same as the front view, and FIG. 18 is the same. FIG.

FIG. 19 is a partially cutaway front view in which a core metal is inserted into the attachment rubber main body of the prior application example, nuts are fixed to both ends thereof, and a stopper plate, a washer, and a bolt are screwed in one direction. On the other hand, the side view of the stopper plate, washer, and bolt on the other side. Fig. 20 shows the attachment rubber body of the previous application and a core metal inserted inside it, and screwed threaded tubes are fixed inside at both ends. However, it is a partially cutaway front view in which the stopper plate, washer, and bolt are screwed in one direction, and the side surface of the stopper plate, washer, and bolt on the other side. FIG. 21 is a rear view of a typical clasp of the prior application, FIG. 22 is a plan view thereof, and FIG. 23 is a side view thereof.

A mounting bolt 7 is screwed into a corresponding position of the insert nut 8 or the screw cylinder 4 fixed to the core metal 3 of the attachment rubber 1 main body, in the contact plate portion 5c that comes into contact with the side surface of the attachment rubber 1 main body. An insertion hole 5b is bored, and a tongue-shaped bent portion 5a for receiving the edge of the shoe 2 is provided at the lower end of the abutting plate portion 5c, and the stopper plate 5 has an L-shaped cross section as a whole. . The height of the contact plate portion 5c is set to be substantially the same as the height of the attachment rubber body 1, and at the time of contact, there is an infinite distance between the bent portion 5a having an L-shaped cross section at the tip and the lower surface of the attachment rubber 1. A space having a thickness for inserting the shoe 2 (FIG. 12) of the track 20 is formed.

At the time of installation, a stopper plate 5 is brought into contact with one end of the attachment rubber 1 main body, and a bolt 7 is screwed into and fixed to the inserted nut 8 or the screw cylinder 4 at both ends of the cylinder 3. One end of the shoe 2 is inserted into the above-mentioned space, and then the other end edge of the shoe 2 is fitted and sandwiched in the space of another stopper plate 5 to insert the insert nut 8 or the insert nut 8 at the other end of the attachment rubber 1 main body. The bolt 7 is screwed into the threaded portions of the threaded cylinders 4 provided at both ends of the cored bar 3, and is tightened and fixed to be attached to the shoe 2. At the time of detachment, each bolt 7 is detachable by rotating it in reverse.

Although the example in which the number of the cored bar 3 is one has been described above, in the example of the large attachment rubber in which the two cored bars 3 are embedded in parallel, the tightening bolt is similar to the above. It is possible to fix by tightening four pieces each of 7, washer 9 and nut 8. Therefore, the time and effort required for tightening and removing the screw are doubled.

Therefore, in order to solve the above-mentioned conventional problems, the present invention securely and quickly attaches the attachment rubber without using or using a normal bolt. It is an object of the present invention to provide a road surface protection device for an endless track.

[0013]

[Means for Solving the Problems]

 The structure of the present invention for solving the above drawbacks and achieving the object will be described with reference to FIGS. 1 to 8 corresponding to the embodiments. The present invention provides an attachment rubber having super strong vibration resistance. 1 is penetrated, a core metal 3 is embedded, an insert is inserted, and a tongue-shaped bent portion 5a 'for receiving the edge of the shoe 2 is provided at one end thereof, and a stopper metal 5'having an L-shaped cross section as a whole. Is fixed by welding or the like, and a stopper plate 5 having an L-shaped cross section is provided on the other end of the core metal 3 with a tongue-shaped bent portion 5a for receiving the edge of the shoe 2 at the lower end. Is a road surface protection device of the endless track 20 in which the end portion of the attachment rubber 1 is fixed and the bent portion 5a is fixed inward.

The attachment rubber 1 having super strong vibration resistance is pierced, the core metal 3 is embedded and inserted, and a tongue-shaped bent portion 5 a ′ for receiving the edge of the shoe 2 is provided at one end of the attachment metal 1. A stopper plate 5 having an L-shaped cross section is fixed by welding or bolts, and one end of the core metal 3 is brought into contact with the metal shoe 2 of the endless track 20 and the attachment rubber main body 21 is brought into contact therewith. , An eaves-shaped fixing portion 11b is formed above a backing plate portion 11c having a fixing portion 11b which covers and fixes the upper end of the receiving metal fitting 12 above, and an inverted triangular locking projection with a head enlarged below Between the core 11a, which forms the part 11a, and the bottomed cylindrical metal fitting 14 is fixedly attached, and in which the inclined part 14c is formed at the tip, and between the rear end face and the bottom of the cylindrical metal fitting 14. Wear the spring 14b The core plate 14a has a sloping surface 14c at the tip thereof which is provided on the outside of the pad plate portion 11c so as to project from a hole 14e, and a bent portion 12a into which the shoe 2 is fitted. It is a road surface protection device for a track 20 which has a convex shape and is fixed by an automatic lock clasp 11 composed of a receiving metal fitting 12 having a hole 12d into which an inclined portion 14c of the projecting tip of a core rod 14a is fitted. .

The attachment rubber 1 having super strong vibration resistance is penetrated, the core metal 3 is embedded and inserted, and a tongue-shaped bent portion 5 a ′ for receiving the edge of the shoe 2 is provided at one end of the attachment metal 1. A stopper plate 5'having an L-shaped cross section is fixed by welding or bolts, and a tongue-shaped bent portion 35a for receiving the edge of the shoe 2 is provided at the lower end at one end of the cored bar 3 at the other end. A stopper plate 35 having an L-shaped cross section is inserted into a center hole 37a of a bolt 37 having a pin 38 having a bulge portion 38a at its tip and a notch 37b in the longitudinal direction at the middle abdomen of the tip taper portion, and the bulge is formed. This is a road surface protection device for the endless track 20 in which the notch 37b of the bolt 37 is pressed and spread by the portion 38a, and the screw at the tip of the bolt 37 is pressed and fixed to the nut or the screw of the screw cylinder 34.

[0016]

[Embodiment of device]

 Since the present invention has such a structure, this structure can save one member for attaching the stopper plate 5 such as the bolt 7, the washer 9, etc., and can also attach and replace the attachment rubber. The man-hours and time can be significantly reduced.

[0017]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 8 are views showing an embodiment of the present invention. Instead of the one stopper plate 5 of the prior application shown in FIGS. 19 to 20, in FIG. A tongue-shaped bent portion 5a 'that receives the edge of the shoe 2 is provided at the lower end, and a stopper plate 5'having an overall L-shaped cross section is fixed to one end of the core metal 3 by welding or the like. A nut 8 is fixed to the other side of the core metal 3 and is integrally inserted, and a stopper plate 5 is tightened and fixed. With such a configuration, one member for mounting the stopper plate 5 such as the bolt 7, the washer 9, etc. can be saved.

2 to 6 are views showing a usage mode and a structure of the automatic lock fitting, and FIG. 2 is a front view showing an attachment process of the attachment rubber main body having the automatic lock clasp attached to the shoe. Fig. 3 and Fig. 3 are front views showing a state in which the rubber main body is attached to the shoe and fixed to the lock plate on the lock side. Fig. 4 is an attachment on the side to which the automatic lock plate is attached. FIG. 5 shows a cutaway bottom view of the rubber body, FIG. 5 shows a plan view of the automatic lock stopper, and FIG. 6 shows a front view of the automatic lock stopper.

As shown in FIGS. 2 to 6, the automatic locking metal fitting is provided with a contact plate portion 11c which is fixed by contacting the attachment rubber main body 21, and the upper portion thereof is fixed by covering the upper end of the stopper plate 5. An eave-shaped fixing portion 11b is formed. An inverted triangular locking protrusion 11a having an enlarged head portion is formed below the eaves-shaped fixing portion 11b. A cylindrical metal fitting 14 having a bottom is fixed to the lower part thereof by welding or the like, and a core rod 14a having an inclined tip is provided therein, and a spring 14b is mounted between the rear end surface and the bottom of the cylindrical metal fitting 14. The inclined surface 14c formed at the tip of the core rod 14a is projected from the hole 14e to the outside of the contact plate portion 11c.

Hook one stopper plate 5 connected and fixed to the embedded core bar 13 to the shoe 2 and attach it to the triangular groove guide 12e of the other automatic lock stopper plate 12 for attaching the attachment rubber 21 to the triangular lock on the main body side. By inserting the projection 11a and press-fitting it, a mechanism is automatically actuated to fix the lock.

The receiving fitting 12 has a bent portion 12a into which the shoe 2 is fitted, which is similar to the bent portion 5a of the stopper plate 5, and its tip is in contact with the eave-shaped fixing portion 11b of the pad plate portion 11c. It has a convex shape that is covered and fixed in contact, and a hole 12d into which the protruding tip of the core rod 14a is fitted is bored in the middle thereof. A releasing hole 12f for inserting a releasing rod for releasing the core rod 14a from the bottom of the hole 12d to the outer surface is formed.

In addition, a packing material 26 that serves as a strong cushion is fitted between the shoe 2 and the receiving metal fitting 12, and the packing material 26 can cover the shoe 2 so that a gap does not occur due to a dimensional error of the shoe 2. Is devised like this.

Then, one stopper plate 5 connected and fixed to the core bar 13 embedded in the attachment rubber main body 21 is hooked on the shoe 2, and the other stopper plate 12 is attached to the bent portion 12a of the shoe 2. 1 end of the attachment rubber 21 and the triangular locking projection 11a of the automatic locking clasp 11 on the main body of the attachment rubber 21 is inserted into the wedge-shaped notch 12e of the bracket 12 and press-fitted. At the same time, the triangular locking protrusion 11a of the automatic lock stopper 11 is inserted into the lock triangular groove 12e of the receiving fitting 12, and the automatic locking of the automatic lock stopper 11 and the receiving fitting 12 is completed.

On the contrary, when the automatic lock is released, when the releasing rod is inserted from the outside through the releasing hole 12f and the core rod 14a is pushed against the spring 14b, the triangular groove guide of the automatic lock receiving member 12 is released. 12a, the triangular locking projection 11a of the automatic lock stopper 11 is released from the triangular groove guide 12e, the automatic lock stopper 11 and the receiving metal fitting 12 are separated, and the lock is released.

2 to 6 showing the present invention, the end faces of the attachment rubber main body 1 are formed by inserting the two core bars 13 and 13 through the attachment rubber main body 21 in the axial direction. One end surface of the cored bar 13 is exposed to one side in the same manner as described above, and one end of the cored bar 13 is bored with a screw hole 18 into which the bolt 7 is screwed in the axial direction, and the bolt 7 is screwed and fixed, or 1, the contact plate portion 5c ′ having the tongue-shaped bent portion 5a ′ for receiving the end edge of the shoe 2 at the lower end is fixed to one end of the cored bar 13 by welding or the like. One member for attaching the stopper plate 5 such as the bolt 7, washer 9 and the like can be saved, and at one end of the core metal 13, a screw hole 18 for axially screwing the bolt 7 is drilled, and the bolt 7 is screwed. Included The work of fixing with or by attaching the contact plate portion 5c 'provided with the tongue-shaped bent portion 5a' to one end of the cored bar 13 by welding or the like can be independently performed in a place separated from the construction site. Therefore, the time required for attachment and detachment can be significantly shortened.

7 to 8 are views showing an external view of the automatic lock bolt of the present invention and a cross-sectional view in which the stopper plate is tightened by the automatic lock bolt. In this method, the stopper plate 5 can be tightened. The bolt 7 used for this purpose is the bolt 37 of the lock bolt device previously filed by the applicant of the present application. The bolt 37 is formed by penetrating through the center hole 37a, and is provided with a break 37b at the tip end portion in the axial direction to retain elasticity.

That is, a tongue-shaped bent portion 5a ′ for receiving the edge of the shoe 2 is provided at one end of the core metal 3 which is inserted by inserting the attachment rubber 1 having super strong vibration resistance. Then, a stopper plate 5'having an L-shaped cross section as a whole is fixed by welding, bolts or the like, and one end of the cored bar 3 has a tongue-shaped bent portion 35a for receiving the end edge of the shoe 2 at the lower end. A stopper plate 35 having an L-shaped cross section is provided, and a pin 38 having a bulged portion 38a at its tip is inserted into a center hole 37a of a bolt 37 having a notch 37b in the longitudinal direction at the middle abdomen of the tapered portion of the tip. Then, the notch 37b of the bolt 37 is pressed and spread by the bulging portion 38a, and the screw at the tip of the bolt 37 is pressed and fixed to the nut or the screw of the screw cylinder 34.

Then, the screw at the base of the bolt 37 is screwed into the screw cylinder 34 embedded in the attachment rubber 31, and the pin 38 having the bulged portion 38a at its head is press-fitted into the center hole 37a. By using the elasticity of the tip of the bolt 37, the tip of the bolt 37 is enlarged, and the screwing area is enlarged and fixed, so that the clasp 35 having the bent portion 35a forming the space for holding the shoe 2 is formed. , It has the feature that it can be fixed so that it will not loosen even under severe vibration, and it is easy to install and the installation work can be done in a short time.

At the time of removal, the pin 38 inserted into the central hole 37a of the bolt 37 is pushed from the hip side and pulled out to facilitate removal. As described above, in the road surface protection device of the endless track, the use of the main bolt 37 enhances safety, workability, and economy. Moreover, even if the bolt 37 and the object to be tightened are rusted when the screw is reversely rotated during removal, the rust will crack and the removal work will be easy.

The bolt 37 has the following structure. The bolt 37 is composed of a bolt 38 and a pin 38 having a bulge portion 38a at the tip which is inserted into a center hole 37a formed in the center of the bolt 37. The bolt 37 has a tapered tip portion and a screw portion at the top and the tip. Divide into two parts in the lower part, and make the middle part the part where the screw is removed, and drill a bottomed center hole 37a through which the pin 38 is inserted in the shaft core part, and the tip of the bolt 37 longitudinally in the middle part of the taper part. Direction, a notch 37b is made up to a position higher than the bottom of the bottomed hole 37a, and the cutting length of the screw in the upper threaded portion is approximately the length of the screw of the nut 34, and the screw in the lower tapered portion is bolted. With the pin 38 pressed into the center hole 37a of the screw 37, the screw is formed into a screw having the same diameter and pitch as the upper screw, and the intermediate portion between the upper screw and the lower screw is removed. It is a tightening lock bolt.

As described above, generally, there are dozens of shoes 2 on the endless track 20 of one construction machine, and on average, 40 roadside protection devices with 40 on one side and 80 on both sides are provided. If they are fixed with two bolts each, a total of 160 bolts 7 will be screwed and tightened. In order to reduce the number of steps for tightening such a large number of bolts 7 at a construction site, the present invention enables the one-touch type configuration without the above-mentioned bolts.

Although the embodiments considered to be typical of the present invention have been described above, the present invention is not necessarily limited to only the structures of these embodiments, and the present invention has the constituent features referred to in the present invention. The above-mentioned object can be achieved and the invention can be appropriately modified and carried out within a range having the following effects.

[0033]

[Effect of device]

 As is apparent from the above description, according to the present invention, when attaching and detaching the attachment rubber protective cover to the endless track 20, the number of bolts 7 and nuts is reduced as much as possible, and the fastening fixation is loosened by vibration and stress. In the end, the number of bolts 7 and nuts 8 used is reduced or eliminated altogether, and with a small number of parts, attachment and detachment of attachment rubber can be done in an extremely short time. Or, it has become possible to expect a remarkable practical effect that the cost can be reduced to zero.

[Brief description of drawings]

FIG. 1 is a front view of the attachment rubber body of the present invention, in which a core metal is inserted into the main body, a stopper metal is fixed to one side, and a nut is fixed to the other side—a cutaway front view of the stopper metal, washer, and bolt. FIG.

FIG. 2 is a front view showing a process of attaching the attachment rubber main body equipped with the automatic locking clasp of the present invention to the shoe.

FIG. 3 is a front view showing a mode in which the attachment rubber main body equipped with the automatic lock stopper of the present invention is attached to the shoe and fixed to the lock stopper.

FIG. 4 is a cutaway bottom view of the attachment rubber main body on the side where the automatic lock stopper of the present invention is mounted.

FIG. 5 is a plan view of the automatic locking clasp of the present invention.

FIG. 6 is a front view of the automatic locking clasp of the present invention.

FIG. 7 is an external view of the automatic lock bolt of the present invention.

FIG. 8 is a cross-sectional view in which a stopper plate is tightened by the automatic locking bolt of the present invention.

FIG. 9 is an external view of an endless track with a conventional ring rubber attached.

FIG. 10 is a perspective view of a crawler belt cover of a prior application example.

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

FIG. 12 is an external view of one side of a road surface protection device in which an attachment rubber is attached to a part of the track of the prior application.

FIG. 13 is a plan view of a conventional attachment rubber body.

FIG. 14 is a side view showing a cutaway cross section of a negative part of an attachment rubber body of a conventional example.

FIG. 15 is a cross-sectional view of a conventional attachment rubber body.

FIG. 16 is a plan view in which a core metal is inserted into the attachment rubber main body of the prior application example and nuts are fixed to both ends thereof.

FIG. 17 is a front view of the attachment rubber body of the prior application example.

FIG. 18 is a cross-sectional view of the attachment rubber body of the prior application example.

FIG. 19 is a partially cutaway front view in which a core metal is inserted into the attachment rubber body of the prior application example, nuts are fixed to both ends of the attachment rubber body, and a stopper plate, a washer, and a bolt are screwed to one side, and the other side. Illustration showing the side of the clasp, washer, and bolt.

[Fig. 20] A part of the attachment rubber main body of the prior application example and a cored bar inserted into the main body, and threaded screw cylinders are fixed to both ends inside, and a clasp, a washer, and a bolt are screwed in one direction. Cutaway front view and side view of clasp, washer and bolt on the other side.

FIG. 21 is a rear view of a typical clasp of the prior application.

FIG. 22 is a plan view of a representative clasp of the prior application of FIG. 21.

FIG. 23 is a side view of the representative clasp of the prior application of FIG. 21.

[Explanation of symbols]

 1 Attachment rubber main body 2 Shoe 2a Shoe mounting hole 2b Shoe blade 3 Core bar 4 Screw cylinder 5 Stopper 5a Bent part 5b Mounting hole 5c Abutment plate 6 Insert stop bar 6a Bent part 7 Bolt 8 Nut 8a Insert nut 9 Washer 11 Automatic lock stopper 11a Locking protrusion 12 Receiving metal fitting 12a Triangular groove guide 13 Core metal 14 Bottomed cylindrical metal fitting 14a Core rod 16 Spring 17 Lock pin 18 Screw hole 20 Endless track 21 Attachment rubber 26 Packing material

Claims (3)

[Scope of utility model registration request] 1. An attachment rubber having ultra-high vibration resistance.
The core metal (3) is inserted through the (1), the insert is inserted, and the tongue-shaped bent part (5a ') for receiving the edge of the shoe (2) is provided at one end of the insert, and the whole is L-shaped in cross section. The stopper plate (5 ') formed on the base plate is fixed by welding or the like, and a tongue-shaped bent portion (5a) for receiving the edge of the shoe (2) is formed at the lower end at one end of the core bar (3). An endless track (20) in which a stopper plate (5) with an L-shaped cross section is attached so that its outer surface is aligned with the end surface of the attachment rubber (1) and the bent portion (5a) faces inward. Road protection device. 2. An attachment rubber having super strong vibration resistance.
The core metal (3) is inserted through the (1), the insert is inserted, and the tongue-shaped bent part (5a ') for receiving the edge of the shoe (2) is provided at one end thereof, and the whole is L-shaped in cross section. The stopper plate (5) formed on the above is fixed by welding or bolts, and the core metal (3)
Attach the attachment rubber body (21) to the metal shoe (2) of the endless track (20) at the other end of the upper part of the fixing part (11b) that secures the upper end of the bracket (12). The eaves-shaped fixing part (11b) is formed above the contact plate part (11c) formed on the lower part, and the inverted triangular locking protrusion part (11a) with the enlarged head is formed below it.
And a bottomed cylindrical metal fitting (14) is fixed below it,
A core rod (14a) having an inclined portion (14c) formed at the tip thereof, and a spring (14b) between the rear end surface and the bottom of the tubular metal fitting (14).
And the contact plate portion (11c) provided with the inclined surface (14c) at the tip of the core rod (14a) protruding from the hole (14e) to the outside of the contact plate portion (11c), and the shoe (2 ) Has a bent portion (12a), the upper end has a convex shape, and a hole (12d) into which the inclined portion (14c) of the protruding tip of the core rod (14a) is inserted is formed. Road surface protection device for endless track (20) fixed by self-locking clasp (11) consisting of metal fittings (12). 3. An attachment rubber having super strong vibration resistance.
The core metal (3) is inserted through the (1), the insert is inserted, and the tongue-shaped bent part (5a ') for receiving the edge of the shoe (2) is provided at one end of the insert, and the whole is L-shaped in cross section. The stopper plate (5 ') formed on the
A stopper having an L-shaped cross section in which the tongue-shaped bent portion (35a) for receiving the edge of the shoe (2) is provided at the lower end at the other end of one side of (3).
Insert pin (38) with bulge (38a) at the tip into the center hole (37a) of bolt (37) that has vertical cut (37b) in the middle abdomen of the tapered tip. Then, by the bulging portion (38a), the notch (37b) of the bolt (37) is pressed and spread out, and the screw at the tip of the bolt (37) is pressed and fixed to the screw of the nut or the screw cylinder (34). Road protection device for track (20).