JP3399871B2 - Anti-slip device for rubber track - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber crawler anti-slip device which is detachably mounted on a rubber track plate to suppress the track plate from slipping on ice and snowy roads.

[0002]

2. Description of the Related Art A rubber crawler using a rubber shoe plate for road surface protection and noise prevention is used in various work machines such as carrier dump trucks and carrier tractors. This rubber crawler is suitable for work on snow.
Since the grip force of the lug projectingly provided on the track plate cannot be expected, conventionally, a chain is wound around the track plate to deal with the problem, but this cannot provide a sufficient anti-slip effect. Therefore, as disclosed in Japanese Unexamined Patent Publication No. 10-16836, there is proposed an anti-slip device including a protruding member that bites into the snow and snow surface.

[0003]

However, in the above-mentioned conventional anti-slip device, the pair of left and right projecting members are connected via the chain, and both projecting members move independently of each other. Therefore, when a large load is applied to the protrusion member on one side due to the unevenness of the road surface, the load concentrates on a part of the lug into which the protrusion member on one side fits. Further, this may cause a force in the twisting direction of the track plate. Further, since the bases of the pair of hooks provided on one side are rigidly connected to the projecting member, only one of the hooks will function when tilted due to lateral displacement, and the side edge portion of the shoe plate with which the hook engages. The load concentrates on.
Therefore, a large load is partially applied to the rubber material of the shoe plate, which causes a problem of damaging the shoe plate.

The present invention has been devised to solve the above-mentioned problems of the prior art, and its main purpose is to:
An object of the present invention is to provide a non-slip device for a rubber crawler which is configured to reduce the load applied to the shoe plate and to enhance the grip force without damaging the shoe plate.

[0005]

In order to achieve such an object, according to the present invention, as shown in claim 1, it is removably attached to a rubber shoe plate (2) so that it can be attached on a snowy surface. In a rubber crawler anti-slip device for suppressing slippage of a track plate, a protrusion (3) that bites into the snow and snow surface has a flat base.
Standing on the surface of the plate (5), this base plate
Abut the back side against the top surface of the lug (4) protruding from the track.
It is installed between multiple lugs lined up in the direction of movement of the track.
In the above aspect, the track plate is provided through the flexible fixing member (7).
It was designed to be attached to the. According to this, since the load applied to the protrusion acts on the shoe plate via the base plate, it is possible to disperse the load from the protrusion over a wide range by using a plate material having a required rigidity such as a steel plate for the base plate, As a result, the load stress generated on the track plate can be reduced and damage to the track plate can be avoided. Moreover,
There is a high degree of freedom in designing the shape of the protrusions, and various forms can be selected according to the road surface conditions such as snow quality and freezing conditions and the structure of the work machine to be mounted. Will get better. In addition,
Load from the base plate is distributed over multiple lugs
Also allows some movement of the base plate,
It is possible to avoid applying an excessive load.

In particular, as described in claim 2, the slip stopper is provided.
The connecting and fixing member (7) in the
The base plate (5) is located at the center of the track plate (2) in the width direction.
To the left and right of the base plate so that
Respectively provided in a plurality, the projection (3) is one of the base
On the base plate, the track rollers (16) for guiding the shoe plate and the shoe plate may be arranged in the inner region of the left and right outer edges of the contact portion of the shoe plate. Bending stress does not occur in the plate, and it is possible to avoid twisting of the track plate. For this reason,
It is possible to solve the problem that the rubber material of the shoe plate is cracked due to the twist and the life of the rubber crawler is shortened.

Further, as described in claim 3, the slip
The connecting and fixing member (7) in the fastening device is a track plate.
A hook (8) that engages the side edge of (2) is provided.
The hook is received in the recess between the two adjacent lugs (4).
In such a manner that the side edges of the track plate (2) are engaged with each other.
Can be achieved. According to this, the hook is
Since the movement in the movement direction is restricted, the base plate
It is possible to suppress this, and some movement is allowed
It And since multiple hooks move independently of each other,
Even if the base plate shifts, the engagement with the side edge of the hook
State is maintained, which distributes the load across multiple hooks.
Therefore, stress concentration on the side edge of the track plate can be relieved.
Wear.

Further, as described in claim 4, the slip
The connecting and fixing member (7) in the stopper is a chain
(9), the chain has the base plate
The connecting part with (5) projects outside the top surface of the lug (4).
It will be stretched in an inclined shape along the recess between the lugs in the protruding state.
It is good to have a structure like this.
The part of the chain protruding outside from the top surface is
It has the effect of cutting into the snowy road surface and increasing grip.
It

Further, as described in claim 5, the slip
The base plate (5) in the stopping device has two
It may be constructed so as to be installed between the lugs (4).
it can.

[0010] In addition, as shown in claim 6, wherein the projections in the anti-skid device (3) includes a pair of corner portions
Is formed into an obtuse Z-shaped cross-section and is concave toward the tip.
It is possible to adopt a configuration provided with a convex , and according to this,
It is possible to prevent buckling of the protrusions by the bent shape to enhance the strength, and it is possible to prevent the gripping force of the protrusions from being lowered due to the entry of ice and snow or mud into the corners due to the obtuse angle.

[0011]

DETAILED DESCRIPTION OF THE INVENTION The configuration of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a first embodiment of a rubber crawler anti-slip device according to the present invention. This anti-slip device 1 is detachably attached to a rubber shoe plate 2 to suppress slippage of the shoe plate 2 on the ice and snow road surface, and a projection 3 that bites into the ice and snow road surface is provided on the shoe plate 2 in a protruding manner. The lug 4 is erected on the front surface of the base plate 5 fixed to the track plate 2 with the back surface abutting against the lug 4.

A plurality of base plates 5 (two in this case) are used.
), And is fixed to the shoe plate 2 via a flexible connecting and fixing member 7. For the base plate 5, a plate material having a required rigidity such as a steel plate is used. The connecting and fixing member 7 includes a hook rod 8 that engages with a side edge portion of the shoe plate 2, and the hook rod 8
Consists of a chain 9 that connects the
One pair is provided on each of the left and right sides of the base plate 5.

The hook rod 8 has a U shape and can be formed by bending a round steel bar. The hook rod 8 is engaged with the side edge portion of the shoe plate 2 in a manner received in the recess between the two adjacent lugs 4 and restrains the movement in the front-back direction, that is, the movement direction of the shoe plate 2. Therefore, the displacement of the base plate 5 is suppressed, but some movement is allowed.

The chain 9 is slanted along the recess between the lugs 4 to connect the hook rod 8 received in the recess between the lugs 4 and the base plate 5 that abuts the top surface of the lug 4. It is provided, and a part thereof protrudes outward from the top surface of the lug 4, and this part bites into the ice and snow road surface together with the projection 3, and an effect of enhancing grip is obtained.

A chain coupling 10 is provided on each of the pair of chains 9 on one side, and the slip prevention device 1 can be attached / detached by inserting / removing the connecting pin. Here, the chain 9
The inner ring and the outer ring, which are included in the above, are fixed to the base plate 5 and the hook rod 8 by welding, respectively, but the ring is loosely inserted into the holes formed in the base plate 5 and the hook rod 8 to make the ring movable. A configuration mode is also possible.

The projection 3 is formed in a Z-shaped cross-section with a pair of corners forming an obtuse angle, and can be manufactured relatively easily by cutting and bending a steel plate material. The protrusions 12 and 13 are formed at both ends, and the load is concentrated on the protrusions 12.
It has a function of connecting and reinforcing 13. Here, since the concave portion 14 extends in a manner slightly inclined with respect to the movement direction of the shoe plate 2, a high strength can be obtained particularly with respect to a load applied to the convex portions 12 and 13 in the movement direction of the shoe plate 2. .

As shown in FIG. 2, the protrusions 3 are provided on the left and right sides of the contact portion between the track roller 16 (lower roller) which is mounted on the lower side of the track frame 15 and guides the track plate 2. It is arranged within the range of the region L inside the outer edge.
Accordingly, even if the load is intensively applied to any position of the protrusion 3, the load from the protrusion 3 does not generate bending stress in the shoe plate 2 and it is possible to prevent the shoe plate 2 from being twisted. The track roller 16 is actually in contact with the core metal 17 of the shoe plate 2.

The non-slip device 1 thus constructed is
Although a plurality of shoes are mounted on the shoe plate 2 at a predetermined interval, the grip force can be further increased by changing the shape of the protrusions as illustrated in FIGS. 3 and 4. In FIG. 3, the anti-slip device 21 and the anti-slip device 1 provided with the projections 23 that are symmetrical with respect to the projections 3 in the anti-skid device 1 shown in FIG. 1 are mounted alternately. In FIG. 4, the anti-slip device 22 and the anti-slip device 21 are provided with a projection 24 in a form in which the projection 23 of the anti-slip device 21 is rotated by 90 °.
And are installed alternately.

The shape of the protrusions, the number of the protrusions, the positions of the protrusions, etc. are not limited to those described above, but may be changed depending on the road surface conditions such as snow quality and freezing condition and the structure of the working machine to be mounted. Various forms can be selected. For example,
As shown in FIG. 7, one protrusion 26 is provided at the center of the protrusion 25 having a substantially Z-shape similar to that described above, and by making the protrusion length large, it is effective for a deep snow road surface. can do. In addition, as shown in FIG.
Providing convex portions 28, 29, 30 at three points, that is, both end portions and the central portion of the protrusion 27 having a letter shape, and forming the tip end thereof relatively sharply is effective for the icy road surface. In addition to providing the projections and depressions on the tip side as described above, a mode in which a plurality of protrusions are erected on the base plate 5 independently of each other is also possible.

FIG. 5 shows a second embodiment of the rubber crawler anti-slip device according to the present invention. In this non-slip device 31, a base plate 33 on which a protrusion 32 is erected has a hat-shaped cross-sectional shape that fits a single lug 4 over substantially the entire width of the shoe plate 2, and is connected to both ends. The pair of attached fixing members 35 and 36 are engaged with the side edges of the shoe plate 2 and are fixed to the shoe plate 2. The base plate 33 is bent so as to be in close contact with the outer surface of the lug 4, and can be formed by bending a steel plate material.

One of the mounting and fixing members 35 comprises a hook plate 37 which sandwiches the side edge portion of the shoe plate 2 with the base plate 33, and is directly fixed to one end surface of the base plate 33 by welding or the like. This hook plate 3
7 has a substantially L-shaped cross section in which the upper end side is bent inward, and can be formed by bending a steel plate material. The other fixing member 36 is a hook plate 38.
And a mounting plate 39 fixed to the other end surface of the base plate 33, and the hook plate 38 is attachable to and detachable from the base plate 33 by a bolt 40 that fastens them. By attaching / detaching the hook plate 38, the anti-slip device can be attached / detached. It is also possible to provide a mounting and fixing member 36 having a detachable structure at both ends of the base plate 33.

The projections 32 have a chevron cross-section and are provided in a pair in different directions. Similar to the first embodiment, the protrusions 32 are arranged within a region L inside the left and right outer edges of the contact portion between the track roller 16 and the shoe plate 2, as shown in FIG. The shape of the protrusions, the number of the protrusions, the position of the protrusions, etc. are not limited to the above-mentioned ones, but may be changed according to the road surface conditions such as snow quality and freezing condition, and the structure of the work machine to be mounted. The form can be selected. For example, as shown in FIG. 9, it is also possible to adopt a mode in which a plurality of (in this case, three) flat plate-shaped projections 42 are arranged with their orientations reversed. Further, it is also possible to adopt an aspect in which unevenness is provided on the tip side like the projection shown in the first embodiment. Further, in this embodiment, the base plate 3
Since the reference numeral 3 extends over substantially the entire width of the shoe plate 2, it is possible to provide the projections over the substantially entire length thereof, for example, a straight plate-shaped projection can be provided over the substantially entire length of the base plate. .

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of an anti-slip device for a rubber crawler according to the present invention.

FIG. 2 is a cross-sectional view of essential parts showing a mounting state in the antiskid device shown in FIG.

3 is a plan view of a main part showing an example of a mounting state in the antiskid device shown in FIG.

FIG. 4 is a plan view of a principal part showing another example of a mounting state in the antiskid device shown in FIG. 1.

FIG. 5 is a perspective view showing a second embodiment of a rubber crawler anti-slip device according to the present invention.

FIG. 6 is a cross-sectional view of essential parts showing a mounting state of the antiskid device shown in FIG.

FIG. 7 is a perspective view of a main part showing another aspect of the protrusion in the antiskid device shown in FIG. 1.

8 is a perspective view of an essential part showing another aspect of the protrusion in the antiskid device shown in FIG.

9 is a perspective view of an essential part showing another aspect of the protrusion in the antiskid device shown in FIG.

[Explanation of symbols]

1 Anti-slip device 2 footwear 3 protrusions 4 rugs 5 base plate 7 Connection fixing member 8 hook rod 9 chains 10 Coupling 12 ・ 13 Convex part 14 recess 15 truck frames 16 track rollers 17 Core 21 ・ 22 Anti-slip device 23 ・ 24 Protrusion 25/27 Protrusion 26/28/29/30 Convex 31 Anti-slip device 32 protrusions 33 base plate 35/36 mounting fixing member 37 ・ 38 Hook plate 39 Mounting plate 40 volts 42 protrusion

Claims (6)

(57) [Claims] 1. A non-slip device for a rubber crawler, which is detachably attached to a rubber track plate to suppress slippage of the track plate on an ice-snow road surface, wherein a projection that bites into the ice-snow road surface is a flat base plate. table
Standing on the surface, this base plate was projected on the track plate
Place the back surface in contact with the top surface of the lugs and line up in the movement direction of the track.
In addition, it can be flexibly connected and fixed between multiple lugs.
A non-slip device characterized in that it is attached to a shoe plate via a fixed member . 2. The connecting and fixing member is a single base plate.
So that the splat is placed in the widthwise center of the track
In addition, a plurality of them are provided on the left and right sides of the base plate
The protrusion is placed on one of the base plates.
Te, anti-skid device according to claim 1, characterized in that arranged in the inner area than the left and right outer edge of the contact portion between the track roller and the track shoe for guiding the track shoe. 3. The connecting and fixing member is provided on a side edge portion of the shoe plate.
It has a hook that engages, and this hook has two adjacent strips.
It engages the side edges of the track in a manner received in the recess between the lugs.
Anti-skid device according to claim 1 or claim 2, characterized in that the the As. 4. The connecting and fixing member has a chain.
The chain is connected to the base plate.
In the recess between the lugs in such a way that they protrude outward from the top surface of the lugs.
It is characterized in that it is stretched along the slope
The anti-skid device according to any one of claims 1 to 3 . 5. The base plate is a two-row lath.
The bridge is constructed so as to be installed between them.
The non-slip device according to claim 4 . 6. The protrusion has a pair of corners that form an obtuse angle.
It has a Z-shaped cross-section and is provided with irregularities on the tip side.
Anti-skid device according to any one of claims 1 to 5, characterized in that the.