JP4931080B2 - Construction equipment exterior equipment - Google Patents

Description

  The present invention relates to an exterior device for a construction machine that provides an exterior product on an outer surface of a body of the construction machine.

  In a construction machine, for example, a hydraulic excavator, an operator or the like often rises on the machine body in order to perform maintenance work such as inspection and repair of an engine and various other devices. In general, since the outer surface of the aircraft is painted, there is a problem that it is slippery. Therefore, conventionally, the safety of the worker has been ensured by attaching a non-slip member such as a non-slip tape as an exterior product to the outer surface of the machine body. However, pasting-type non-slip members such as non-slip tape have poor weather resistance and are easily deteriorated, and have a drawback that they are easily peeled off from the outer surface of the airframe due to their low adhesive strength. .

In order to eliminate such problems of durability and reliability, a non-slip member has been proposed in which a non-slip plate provided with a plurality of protrusions for anti-slip is arranged on the airframe (Patent Document). 1, see Patent Document 2).
According to Patent Document 1, an anti-slip plate, that is, the anti-slip plate, is disposed on, for example, an upper steel plate forming a counterweight as a machine body of a construction machine. The upper surface steel plate covers the upper surface opening of the outer cover body of the counterweight filled with concrete or the like, and has an extended portion extending from the outer cover body. A locking member that locks one end edge of the anti-slip plate is disposed on the upper surface of the upper surface steel plate, a through hole is formed in the extended portion, and the through hole is further formed on the lower surface. A weld nut is welded coaxially. On the other hand, the anti-slip plate is a rectangular steel plate, and has a plurality of protrusions obtained by drilling a plurality of burring holes on the upper surface, and the weld nut at the other end on the extension portion side. Bolt through holes are formed at corresponding positions. The anti-slip plate has one end edge locked to the locking member, the other end is overlaid on the extension of the upper steel plate, and the bolt inserted through the bolt through hole of the anti-slip plate is extended. It is positioned and fixed on the upper surface steel plate of the counterweight by being screwed into the weld nut of the part.

According to Patent Document 2, the anti-slip member as an anti-slip plate has a plurality of anti-slip protrusions on its outer surface and a plurality of bolts protruding from the back surface, while the outer surface of the fuselage is The steel plate to be formed has a penetration hole slightly larger than the outer diameter of the bolt. In this case, the anti-slip member is inserted into the bolt through the corresponding penetration hole on the steel plate side, overlapped with the steel plate, and the steel plate is interposed between the nut and the anti-slip member by a nut screwed into the bolt. By being pinched, it is placed and fixed on the outer surface of the airframe, that is, the steel plate.
JP 2001-262619 A JP 2006-341702 A

As described above, the attachment of the anti-slip plate disclosed in Patent Document 1 requires an extended portion that extends from the outer body of the counterweight on the upper surface steel plate. Such a counterweight has a problem in that not only the counterweight but also the configuration and arrangement of adjacent components are complicated in relation to other adjacent components constituting the aircraft.
On the other hand, for the attachment of the anti-slip member disclosed in Patent Document 2, as described above, a nut must be screwed into the bolt from the back surface of the steel plate of the machine body, and the attachment of the anti-slip member is difficult. In addition, since the steel plate of the fuselage must be provided with a penetration hole for the bolt to penetrate, when the steel plate forms the upper part of the fuel tank forming a part of the fuselage, from the viewpoint of maintaining the airtightness of the fuel tank. The mounting structure of Patent Document 2 cannot be adopted. If the mounting structure of Patent Document 2 is applied to a fuel tank, in order to maintain the airtightness in the fuel tank, the fuel tank must have a double structure, the structure becomes complicated, and the capacity of the tank There is also a problem that must be reduced. Therefore, anti-slip on the fuel tank is often dealt with by applying non-slip tape.

  The present invention has been proposed in order to solve the above-described problem, and even if the part to which the exterior product is to be attached is a part of a body that is in the form of a container such as a fuel tank, the present invention can be easily used with a simple mechanism. An object of the present invention is to provide an exterior device for a construction machine capable of reliably mounting an exterior product.

In order to achieve the above object, an exterior device for a construction machine according to claim 1 of the present invention is an exterior device provided on an outer surface of a machine body that is an upper surface of a machine body in a construction machine, and a through hole formed in the outer surface of the machine body, A nut member having a bottomed screw hole exposed from the outer surface of the machine body and being inserted into the machine body through the through hole, and attached to the outer surface of the machine body by screwing a mounting bolt into the screw hole of the nut member. And a seal region that hermetically seals the nut member against the outer surface of the airframe, wherein the exterior product is a non-slip plate .

A construction machine exterior device according to a second aspect of the present invention is the construction machine exterior device according to the first aspect, wherein the nut member has a flange portion superimposed on the outer surface of the machine body .

The exterior device for a construction machine according to claim 3 of the present invention is the exterior device for a construction machine according to claim 1 or 2 , wherein the anti-slip plate includes a plate body, and a plurality of protrusions formed on the surface of the plate body. It has a bolt insertion hole formed in the plate body for inserting the mounting bolt and through which the mounting bolt is inserted.

According to the exterior device of the construction machine of the present invention, the exterior product can be easily and reliably attached to an arbitrary position on the outer surface of the machine body of the construction machine with a simple mechanism. Further, since the exterior product can be attached to the machine body only by an operation from the outer surface side of the machine body of the construction machine, the efficiency of attaching the exterior product can be improved. In particular, since some operations such as turning a nut from the inside of the container do not need to be performed on a part of the aircraft in the form of a container, an exterior product can be easily attached to a part of the body in the form of a container. The complexity of the mounting work can be omitted. Moreover, since the nut member which has a bottomed screw hole is used, the airtightness of a container can also be maintained.

Further, according to the exterior system for a construction machine of the present invention, further, the nut member because it has a collar portion, can prevent the problem of dropping the nut member in the through hole provided on the body outer surface, and easy positioning As a result, the mounting work efficiency can be improved.
Further, according to the exterior system for a construction machine of the present invention, with respect to body outer surface, so further comprises a seal area for sealing the nut member in an airtight, when applied to the fuel tank if example embodiment, mixing of foreign matter into the fuel tank Further, it is possible to effectively prevent leakage of gas generated by volatilization of fuel and out of the fuel tank. Furthermore, since the structure is simple, it is possible to dispose the exterior product directly on the upper steel plate of the fuel tank without sacrificing the capacity of the fuel tank. In addition, since the anti-slip plate can be attached to the upper surface plate of the fuel tank, which has conventionally been handled by non-slip tape, the safety of the operator can be ensured more reliably.

In addition, according to the exterior device for a construction machine of the present invention, the plurality of protrusions on the surface of the anti-slip plate ensure a sufficient anti-slip function.

(Example)
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an exterior device for a construction machine according to the present invention will be described with reference to the drawings.
The construction machine to which the present invention is applied is not particularly limited. For example, a case where the present invention is applied to a crawler type hydraulic excavator shown in FIG. 1 will be described.
The hydraulic excavator 1 in FIG. 1 includes a lower traveling body 2, and an upper swing body 3 is turnably provided on the lower traveling body 2. The upper swing body 3 is provided with a cab 4 on the left side of the front part, and a boom 5 extends from the center thereof. An arm (not shown) is disposed at the tip of the boom 5, and a bucket (not shown) is attached to the tip of the arm.

  In a hydraulic excavator, in order to perform maintenance work such as inspection and repair of an engine and other various devices, an operator or the like climbs on the machine body, specifically on an engine building or a fuel tank of the upper swing body 3. There are many cases. At this time, a plurality of anti-slip plates 6 as exterior products are attached to the upper surface (the outer surface of the machine body) of the engine building and the fuel tank so that the operator's feet do not slip.

FIG. 2 shows a schematic configuration of a rectangular anti-slip plate 6 disposed on the fuel tank 8.
The anti-slip plate 6 includes a plate body 10 made of a thin rectangular steel plate, and a large number of burring projection holes 11 projecting from the upper surface are distributed in a lattice point arrangement on the upper surface of the plate body 10. More specifically, the burring protrusion holes 11 protrude from the upper surface of the plate body 10, and the same pitch is secured between the burring protrusion holes 11 adjacent in the vertical and horizontal directions. As apparent from FIG. 2, bolt insertion holes 12 are formed at the four corners of the plate body in place of the burring protrusion holes 11.

  Furthermore, circular emboss holes 13 are uniformly distributed on the upper surface of the plate body 10 in a lattice point arrangement. More specifically, these embossed holes 13 are arranged so that the individual burring protruding holes 11 are located in the center of the stitches defined by the lattice point arrangement. Therefore, the distance between the emboss holes 13 adjacent in the vertical and horizontal directions, that is, the pitch thereof is the same as the pitch of the burring protrusion holes 11.

The embossed holes 13 described above form circular embossed protrusions as convex portions on the lower surface of the plate body 10. These emboss projections have a smaller diameter than the burring projection hole 11, and such a small diameter emboss projection increases the rigidity of the plate body 10, so that a thin steel plate can be used for the plate body 10.
The fuel tank 8 is a container formed by combining steel plates in a substantially rectangular parallelepiped shape and welding adjacent steel plates, and contains fuel supplied to the engine. The upper surface steel plate 8a of the fuel tank 8 is a rectangular steel plate, and a fuel filler opening 14 is disposed at a predetermined position. When the anti-slip plate 6 is disposed on the upper surface steel plate 8a, the upper surface steel plate 8a is provided with through holes 8b at positions corresponding to the bolt insertion holes 12 of the anti-slip plate 6.

  A metal fitting nut 9 is attached to each through-hole 8b in an airtight manner. More specifically, as shown in FIG. 3, the fitting nut 9 includes a nut body 9a. The nut body 9a has an outer diameter that can be inserted into the through hole 8b, and has a bottomed end that is closed at one end. It has a hollow cylindrical shape. Further, the fitting nut 9 includes a flange portion 9c, and this flange portion 9c is provided on the outer periphery of the opening 9b at the other end of the nut body 9a. The flange portion 9c has a larger diameter than the through hole 8b, and the thickness thereof is the same as the protruding amount of the embossing protrusion 18 protruding from the lower surface of the anti-slip plate 6 described above. A female screw portion 9d that is screwed with the mounting bolt 7 is formed on the inner peripheral wall of the nut body 9a. That is, the fitting nut 9 has a bottomed screw hole.

  As is apparent from FIG. 3, the fitting nut 9 described above is inserted in the through hole 8b of the upper surface steel plate 8a of the fuel tank 8 from above, and the flange 9c is in contact with the upper surface steel plate 8a. Are attached to the upper surface steel plate 8a. And the outer periphery of the collar part 9c is air-tightly welded to the upper surface steel plate 8a in this state, and the reference number 17 shows the fillet part in FIG. That is, this fillet portion 17 serves as a seal region that hermetically seals the fitting nut 9 with respect to the upper surface steel plate 8a. Therefore, the fitting nut 9 has an internal thread portion 9d exposed from the upper surface steel plate 8a, that is, an opening 9b of the screw hole.

If the above-described fitting nut 9 is provided in the upper surface steel plate 8 a, the anti-slip plate 6 is disposed at a predetermined position on the upper surface steel plate 8 a of the fuel tank 8, and the mounting bolt 7 is inserted through the bolt insertion hole 12 of the anti-slip plate 6. The anti-slip plate 6 can be fastened to the upper surface of the fuel tank 8 simply by screwing into the female screw portion 9 d of the fitting nut 9.
Further, since the embossing protrusion 18 on the lower surface of the anti-slip plate 6 has the same projection amount as the thickness of the flange 9c of the fitting nut 9, the anti-slip plate 6 is placed on the flange 9c of each fitting nut 9. When placed, each emboss projection 18 abuts on the upper steel plate 8a, and a stable placement state of the anti-slip plate 6 is ensured.

  As described above, according to the exterior device for a construction machine of the present invention, when the anti-slip plate 6 is attached to the fuel tank 8, the attaching operation can be performed from the outside of the fuel tank 8 after the fuel tank 8 is manufactured. Therefore, not only can the attachment be performed easily, but also the assembly work efficiency of the fuel tank 8 can be improved. Further, since the screw hole of the fitting nut 9, that is, the female screw portion 9d has a bottom, the fuel in the fuel tank 8 does not leak to the outside through the female screw portion 9d, and the fitting nut 9 has its flange portion 9c. Can be hermetically attached to the fuel tank 8 simply by welding to the upper surface steel plate 8a of the fuel tank 8, and the air tightness of the fuel tank 8 can be easily maintained. Therefore, the fuel tank 8 does not need to have a double structure, and the capacity of the fuel tank 8 is not sacrificed.

  The outer layer device of the present invention is not limited to application to a fuel tank, but can also be applied to other tanks such as a hydraulic oil tank. Further, the exterior device of the present invention is not limited to the attachment of the non-slip plate 6 on the fuel tank 8, but as shown in FIG. 1, on the upper plate 15 of the engine building, on the counterweight 16, etc. It can also be applied to other parts of the aircraft where operators may get on and off.

  In particular, when the exterior device of the present invention is applied to a counterweight, a through-hole is formed in the outer cover of the counterweight that is in a temporarily assembled state before being filled with concrete for weight, that is, the above-described upper surface steel plate. If the fitting nut is inserted into the through hole and the flange portion is welded to the upper steel plate, the anti-slip plate 6 can be similarly attached to the counterweight via the fitting nut. Again, since the fitting nut maintains the airtightness in the outer cover of the counterweight, even if the concrete is filled in the outer cover of the counterweight, the concrete leaks from the gap between the fitting nut and the through hole. There is no.

In the present invention, the means for fixing the fitting nut to the outer surface of the fuselage is not limited to welding, and fixing of the fitting nut on the outer surface of the fuselage may be performed by using an adhesive or a sealing agent. Good. In this case, the fitting nut can be arranged more simply.
Further, it goes without saying that the exterior device of the construction machine of the present invention can be similarly applied to other than the upper surface of the machine body of the construction machine, for example, the side surface of the machine body. The exterior product is not particularly limited as long as it can be fastened with a mounting bolt, and examples thereof include a tool box, a rack, and a rotating lamp.

It is a perspective view showing a schematic structure of a crawler type hydraulic excavator as a construction machine. It is a perspective view which shows schematic structure of the exterior apparatus which attaches the anti-slip | skid plate which concerns on 1st Example as exterior goods to a fuel tank. It is sectional drawing which shows a fitting nut.

Explanation of symbols

1 Excavator (construction machine)
2 Lower traveling body 3 Upper revolving body 4 Driver's cab 5 Boom 6 Non-slip plate 7 Mounting bolt 8 Fuel tank 8a Top surface steel plate 8b Through hole 9 Fitting nut 9a Nut body 9b Opening 9c Eaves 9d Female thread 10 Plate body 11 Burring protrusion hole 12 Bolt insertion hole 13 Emboss hole 14 Oil supply port 15 Upper surface steel plate 16 of engine building Counterweight 17 Fillet portion 18 Emboss protrusion

Claims (3)

In the exterior device provided on the outer surface of the airframe that is the upper surface of the airframe in the construction machine,
A through hole formed in the outer surface of the body,
A nut member provided in an immersed state through the through-hole in the body and having a bottomed screw hole exposed from the outer surface of the body;
An exterior product attached to the outer surface of the machine body by screwing a mounting bolt into a screw hole of the nut member ;
A seal region that hermetically seals the nut member against the outer surface of the machine body;
The exterior device for a construction machine, wherein the exterior product is a non-slip plate .   The exterior device for a construction machine according to claim 1, wherein the nut member has a flange portion superimposed on the outer surface of the machine body. The anti-slip plate includes a plate main body, a plurality of protrusions formed on the surface of the plate main body, and a bolt insertion hole formed in the plate main body for inserting the mounting bolt and through which the mounting bolt is inserted. The exterior device for a construction machine according to claim 1 , wherein the exterior device is provided.

Images