JP2015206222A - Wiring structure of construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To wire and fix a harness inserted under a cabin in a state of not causing the corner touch to a reinforcement beam of a floor plate under surface and also in a compact state of restraining a vertical dimension.SOLUTION: A cross-sectional V-shaped reinforcement beam 14 is provided on an under surface of a floor plate of a cabin, and a harness 7 for connecting electric devices inside and outside the cabin to each other is wired in the direction crossing the reinforcement beam 14 along the under surface of the floor plate 6. On the assumption of this, the reinforcement beam 14 is provided with a harness guide part 15b inclined in the harness wiring direction, and a getting-over part 7a of the harness 7 is wired along the harness guide part 15b, and is also fixed by a fastener 11 attached to the harness guide part 15b.

Description

  The present invention relates to a wiring structure for passing a harness for connecting electrical devices inside and outside a cabin under a cabin in a construction machine such as an excavator.

  Taking the shovel as an example, the background art will be described with reference to FIGS.

  As shown in FIG. 6, the excavator is mounted on a crawler-type lower traveling body 1 so that an upper swing body 2 can swing around an axis perpendicular to the ground, and an upper frame serving as a base of the upper swing body 2 3 is equipped with various facilities and equipment such as a cabin 4 and a work attachment (not shown) attached to the front of the frame.

  In this specification, the position of the cabin 4 is defined as the left front portion, and the directions of “left and right” and “front and rear” are defined based on this position.

  A cabin deck 5 is provided at the left front portion of the upper frame 3, and the cabin 4 is mounted on the cabin deck 5 via a vibration isolation mount (not shown) (see Patent Document 1).

  On the other hand, a wiring space A is formed under the cabin, that is, between the floor plate 6 serving as the floor of the cabin 4 and the cabin deck 5, and a harness (electrical wiring) 7 for connecting electrical devices inside and outside the cabin 4 is provided as a floor plate. 6 is led out to the wiring space A from the wiring hole 8 provided in the front portion of the 6, and passes through the space A in the rearward direction. In FIG. 6, 9 is a driver's seat provided in the cabin 4.

  Such a wiring structure is shown in Patent Document 2.

  Here, as shown in FIGS. 8 and 9, a U-shaped or hat-shaped reinforcing beam 10 for reinforcing and reinforcing the plate 6 is attached to the lower surface of the floor plate 6.

  In the figure, the case where the reinforcing beams 10 are provided at three positions at intervals in the wiring direction (front-rear direction) of the harness 7 is illustrated as being orthogonal to the wiring direction.

  In this case, the harness 7 is wired over several reinforcing beams 10 (for example, the foremost reinforcing beam 10 close to the wiring hole 8, which will be described below in this example) as illustrated. Hereinafter, the harness portion overcoming the reinforcing beam 10 is referred to as “override portion” (indicated by reference numeral “7a” in FIG. 9).

JP 2006-56325 A JP 2012-188848 A

  According to this wiring structure, for example, the rear side of the crossover portion 7a of the harness 7 is in a “per corner” state in which it contacts the corner 10a (indicated by a black dot in FIG. 9) of the rear right angle portion of the reinforcing beam 10, There is a risk that parts will be rubbed and damaged by vibration of the fuselage.

  In order to prevent this, the harness 7 may be largely detoured in a gently bent state so that the overpass portion 7a does not contact the corner 10a, but this increases the amount of protrusion of the overpass portion 7a downward. .

  Further, in order to suppress vibration of the climbing portion 7a, the portion 7a is fixed to the bottom surface of the reinforcing beam 10, for example, a bundling provided with a stop shaft 11a with a check projection and a tightening band 11b as shown in the figure. Although it is desirable to fix with the fastener 11 of a band structure, when this is done, the protrusion amount of the fastener 11 below the reinforcing beam becomes large.

  Due to these two points, the downward projecting amount of the entire overriding portion 7a including the fastener 11 is increased, and there is a problem in that the necessary upper and lower dimensions of the wiring space A are increased.

  As a solution to the above problem, it is conceivable that a wiring through hole is provided in the side surface of the reinforcing beam 10 in the front-rear direction, and the harness 7 is passed in a straight line here, but the wiring work becomes troublesome, Since a bad effect such as a reduction in the reinforcing function of the reinforcing beam 10 is great, it is not a good idea.

  Therefore, the present invention is premised on a structure in which the harness is routed over the reinforcing beam provided on the lower surface of the floor plate, and the harness is in a compact state in which the required dimension in the vertical direction is suppressed without causing corner hitting. A wiring structure for a construction machine that can be wired and fixed is provided.

  As means for solving the above problems, in the present invention, a reinforcing beam is provided on the lower surface of the cabin floor plate, and a harness is wired in a direction intersecting the reinforcing beam along the lower surface of the floor plate. In the wiring structure, a harness guide portion inclined in the wiring direction of the harness and harness fixing means for fixing the harness to the harness guide portion are provided at least at a portion intersecting the harness in the reinforcing beam.

  According to this configuration, with respect to the “per corner” of the harness, there is no corner at right angles to the reinforcing beam, and therefore there is no possibility that the part of the harness that gets over the corner contacts the corner.

  Further, regarding the downward protrusion amount of the climbing portion, first, the harness can be passed under the reinforcing beam in a gently bent state along the inclined harness guide portion, that is, in a state where the downward protrusion amount is small.

  Secondly, since the fixing means is provided in the harness guide portion, the downward projecting amount of the fixing means can also be reduced.

  Therefore, it is possible to suppress the downward protruding amount of the entire climbing portion including the fixing means to be small.

  In this case, it is desirable to provide the harness guide portion over the entire length of the reinforcing beam.

  By so doing, the position in the left-right direction for exerting the harness guide function and the fixing function can be arbitrarily selected from the entire length of the reinforcing beam, so that the degree of freedom of wiring is increased.

  Preferably, the reinforcing beam is formed in a V-shaped cross section provided on both sides of the harness guide portion sandwiching the reinforcing beam center line.

  By so doing, the position in the front-rear direction for exerting the harness guide function and the fixing function can be arbitrarily selected from the both-side harness guide portions, so that the degree of freedom of wiring is further increased.

  According to the present invention, on the premise of wiring the harness over the reinforcing beam provided on the lower surface of the floor plate, the harness is in a compact state without incurring corner hits and suppressing the required vertical dimension. It can be wired and fixed.

It is a reverse view of the floor plate concerning the embodiment of the present invention. It is the perspective view seen from the back side same as the above. FIG. FIG. 4 is an enlarged view of a portion surrounded by a broken line in FIG. 3. (a)-(d) is a schematic sectional drawing which shows the variation of a reinforcement beam. It is a side view for demonstrating the shovel which is the application object of this invention, and a prior art. It is a disassembled perspective view of the cabin and floor plate of an shovel. It is the perspective view seen from the back surface side of the conventional floor plate. It is an expanded sectional view which shows the conventional wiring structure.

  An embodiment of the present invention will be described with reference to FIGS.

  The embodiment is applied to an excavator.

  In the embodiment, the following points related to the basic configuration of the excavator are the same as those of the conventional technique.

  (i) As shown in FIG. 6, the cabin deck 5 is provided on the left front portion of the upper frame 3 that is the base of the upper swing body, and the cabin 4 is mounted on the cabin deck 5.

  (ii) A wiring space A is formed under the cabin, that is, between the floor plate 6 that serves as the floor of the cabin 4 and the cabin deck 5, and the harness 7 that connects electrical devices inside and outside the cabin is connected to the wiring hole of the floor plate 6. 8 is derived from 8 into the wiring space A and passes through the space A in a backward direction.

  (iii) A reinforcing beam is provided on the lower surface of the floor plate 6.

  In the embodiment, as shown in FIGS. 1 and 2, reinforcing beams 12, 13, and 14 are attached to the three portions of the rear, middle, and front of the bottom surface of the floor plate.

  Among them, the intermediate and rear reinforcing beams 12 and 13 are formed in a U-shaped cross section (may be a hat shape in cross section) as in the conventional case.

  On the other hand, as shown in FIG. 4, the front reinforcing beam 14 is formed by integrally providing horizontal mounting portions 16, 16 on both front and rear sides of the main body portion 15, and the both side mounting portions 16, 16 are formed on the lower surface of the floor plate. Installed.

  The main body portion 15 is formed in a V-shaped cross section in which the front and rear side portions 15a and 15b sandwiching the reinforcing beam center line are inclined upwardly toward the lower surface of the floor plate, and the both side inclined portions 15a and 15b are harness guides. Has become a department.

  As shown in FIGS. 1 to 3, the harness 7 extends in the front-rear direction along the lower surface of the floor plate and bypasses the sides of the rear and intermediate reinforcing beams 12 and 13 to reinforce the front portion. The beam 14 is wired along a route over the beam 14.

  In this case, the riding over portion 7a of the harness 7 is passed under the front reinforcing beam 14 in a state of being gently bent along the rear harness guide portion 15b as shown in FIGS.

  Further, a fastener 11 having a binding band structure having a fixing means, for example, a shaft portion 11a with a check projection and a tightening band 11b, is attached to the rear harness guide portion 15b. Fixed by.

  As a result, vibration of the climbing portion 7a is suppressed, and a certain gap is secured between the climbing portion 7a and the front reinforcing beam 14 including the rear harness guide portion 11b.

  Here, the fastener 11 is attached at a right angle with respect to the rear harness guide portion 15b inclined rearwardly upward, that is, in a state inclined not rearward but downward (small amount of downward protrusion).

  Note that the overpass portion 7a may be passed along the front harness guide portion 15a and fixed by the fastener 11 attached to the guide portion 15a, contrary to the illustrated state.

  According to this wiring structure, since the right-angle corner itself does not exist in the front reinforcing beam 14 that the harness 7 rides over, there is no possibility that the ride-over portion 7a contacts the corner.

  Regarding the downward projecting amount of the climbing portion 7a, first, the harness 7 can be passed under the reinforcing beam in a gently bent state along the inclined harness guide portion 15b, that is, in a state where the downward projecting amount is small. .

  Secondly, since the fastener 11 as the fixing means is attached to the inclined harness guide portion 15b, the downward protruding amount of the fastener 11 can also be reduced.

  Accordingly, it is possible to suppress the downward protrusion amount of the entire overriding portion including the fastener 11 to be small.

  In this case, since the harness guide portion 15b is provided over the entire length of the front reinforcing beam 14, the left-right position where the harness guide function and the fixing function are exhibited can be arbitrarily selected from the entire length portion of the reinforcing beam 14. . For this reason, the freedom degree of wiring becomes high.

  Further, since the harness guide portions 15a and 15b are provided on both front and rear sides across the center line of the reinforcing beam (the reinforcing beam 14 is formed in a V-shaped cross section), the position in the front-rear direction that exhibits the harness guide function and the fixing function Can be arbitrarily selected from the two-sided harness guide portions 15a and 15b. For this reason, the freedom degree of wiring becomes still higher.

Other embodiments
(1) As other shapes of the reinforcing beam 14 with the harness guide portion, as shown in FIG. 5 (a), a cross-section V-shape corresponding to the main body portion 15 of the above embodiment, or a cross-section U-shape as shown in FIG. 5 (b). A shape in which both front and rear sides are inclined, or a circular arc shape as shown in FIG.

  Alternatively, as shown in (d), only the rear side of the U-shaped cross section may be inclined.

  The common sign “B” is attached to the harness guide portions in these variations. Moreover, the black circle in a figure shows the attachment point of the fastener 11 of embodiment.

  (2) In the embodiment shown in FIGS. 1 to 4, the harness guide portion 15 b is provided only in the foremost reinforcing beam 14 among the reinforcing beams 12 to 14 of the floor plate 6. One or both may be provided with a harness guide portion and the harness 7 may be wired along all the harness guide portions.

  (3) In the embodiment including FIGS. 5A to 5D, the harness guide portions 15b and B are provided over the entire length of the reinforcing beam. It is good also as a harness guide part by inclining only a part.

  (4) A harness fixing means other than the fastener 11 of the embodiment (for example, a U-shaped bolt and a nut) may be used.

4 Cabin 6 Floor plate 7 Harness 7a Override part of harness 11 Fastener as fixing means 14 Front reinforcement beam 15 Body part of reinforcement beam 15a Harness guide part B Harness guide part

Claims (3)

  In a wiring structure of a construction machine, a reinforcing beam is provided on a lower surface of a floor plate serving as a cabin floor, and a harness is wired in a direction crossing the reinforcing beam along the lower surface of the floor plate. A wiring structure for a construction machine, characterized in that a harness guide portion inclined in the wiring direction of the harness and harness fixing means for fixing the harness to the harness guide portion are provided at a portion intersecting with the harness.   The wiring structure for a construction machine according to claim 1, wherein the harness guide portion is provided over the entire length of the reinforcing beam.   3. The wiring structure for a construction machine according to claim 2, wherein the reinforcing beam is formed in a V-shaped cross section provided on both sides of the harness guide portion sandwiching the reinforcing beam center line.

Images