JP2016169529A - Piping joint device of construction machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the workability and appearance of piping by enhancing a joint function in a piping length direction while suppressing an increase in weight.SOLUTION: A piping joint device for arranging a plurality of pieces of hydraulic piping on a boom side surface of a work attachment includes both tip-side and base end-side piping plates 21 and 22 that are attached to the boom side surface at an interval in a piping length direction, and a plurality of tubes 23 that are attached astride both the piping plates 21 and 22. Piping connection parts 23a and 23b, to which piping such as a hose is connected, are provided at both the length-direction ends of the tube 23, respectively.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a piping joint device for a construction machine used when, for example, hydraulic piping is assembled to a side surface of a boom of a work attachment in an excavator.

  The background art will be described using an offset excavator as an example.

  As shown in FIG. 13, the excavator has a base machine in which an upper swing body 2 is mounted on a crawler type lower traveling body 1 so as to be rotatable around an axis perpendicular to the ground. A work attachment 3 is attached to the front of the upper swing body 2).

  The work attachment 3 includes a boom 5 that can be raised and lowered around a boom foot pin 4, an arm 7 that is attached to the tip of the boom 5 so as to be vertically rotatable around a boom top pin 6, and an arm that is attached to the tip of the arm 7. A work device (usually a bucket, which will be described in this example) 9 is provided around the top pin 8 so as to be pivotable up and down, and various operations such as excavation and loading are performed by the undulation and bending operation of the work attachment 3. Is done.

  In the case of an offset excavator, the boom 5 includes a rear boom 5a attached to the upper swing body 2, and left and right fronts connected to the tip of the rear boom 5a so as to be rotatable around the offset support shaft 10 in the vertical direction. Booms (also referred to as offset booms) 5b and 5b, and an upper boom 5c attached to the front boom tip so as to be pivotable in the left-right direction around the upper boom support shaft 11 in the vertical direction. The arm 7 and the bucket 9 move in parallel to the left and right, and a side digging operation or the like is performed.

  In FIG. 13, 12 is a boom cylinder for raising and lowering the boom 5 (rear boom 5 a), 13 is an arm cylinder for rotating the arm 7 up and down, and 14 is a bucket cylinder for rotating the bucket 9 up and down.

  In this offset type excavator, a plurality of hydraulic actuators connected to work attachment hydraulic actuators excluding the boom cylinder 12, that is, an arm, bucket cylinders 13 and 14, and an offset cylinder (not shown) that rotates the front boom 5b left and right. The pipe H is routed in the boom length direction in a state of being arranged in the pipe diameter direction on the side surface of the work attachment 3, specifically, the boom 5 and the arm 7.

  In this case, the hydraulic pipe H is normally routed on the outer surface of the rear boom as an exposed pipe only in the rear boom 5a, and the other part is internally passed as a concealed pipe for the purpose of avoiding contact with an external obstacle.

  For the hydraulic pipe H, a flexible hydraulic hose, a steel pipe tube, or both are used.

  As means for assisting the piping work of such work attachment piping (exposed piping), a piping joint device disclosed in Patent Document 1 is known.

  In this known technique, a bracket plate is fixed to the side surface of the boom in the piping path, and a plurality of relay pipes are attached to the bracket plate in parallel with the pipe diameter direction in the boom length direction, and hydraulic pressure is applied to both ends of each relay pipe. The hose is connected.

Japanese Utility Model Publication No. 6-71988

  According to the above known technique, there is an effect of accurately determining the position and direction of the piping with respect to the side surface of the boom, but since only a very short part of the piping path performs the joint function, the workability of the piping is reduced. The effect of improvement is not obtained.

  Further, in terms of appearance, since the effect of improving the aesthetics by the joint is hardly obtained, the appearance is not compensated for, and a cover for the blindfold is necessary.

  As a means for expanding the joint function according to a known technique, it is conceivable that the bracket plate and the relay pipe are sufficiently long in the piping length (boom length) direction.

  In this way, the proportion of the relay pipes in the entire piping path increases, and the workability and appearance of the piping are improved. On the other hand, the length of the bracket plate increases, and the weight of the entire pipe mounting device increases, resulting in an increase in cost and boom. This is not a good idea because it will cause adverse effects such as deterioration of assembly.

  Therefore, the present invention provides a pipe joint device for a construction machine that can improve the workability and appearance of the pipe by expanding the joint function in the pipe length direction while suppressing an increase in weight.

  As a means for solving the above problems, in the present invention, a pipe joint device for routing a plurality of hydraulic pipes arranged in the diameter direction along a structure of a construction machine, wherein the pipes are spaced in the pipe length direction. A pair of piping plates attached to the structure and a plurality of tubes attached across the two piping plates, and pipes such as hoses are connected to both ends in the length direction of the tubes. A pipe connection part is provided.

  According to this configuration, since the pipe joint device is configured by straddling the tubes between the two side pipe plates, the entire length of the device can be increased by lengthening only the tubes.

  That is, the joint function can be expanded in the pipe length direction while suppressing an increase in weight.

  This expansion of the joint function can basically improve the workability of the piping, improve the appearance of the entire piping, and omit the cover for blindfolding.

  In this case, the entire pipe joint device is so-called sub-assembled and assembled to a structure (the boom of the work attachment in claims 4 to 7), and then a pipe such as a hydraulic hose is connected to the pipe connection portion of each tube. Therefore, the piping workability can be further improved.

  In the present invention, it is preferable that the structure is provided with a pipe plate mounting seat for detachably bolting both pipe plates.

  According to this configuration, the sub-assembled pipe joint device can be easily assembled to the structure by bolting. In addition, it is easy to attach and detach the device according to the pipe change.

  In the present invention, it is preferable that a clamp device is provided on both the pipe plates so as to detachably attach both ends of the tube.

  According to this structure, the subassembly which assembles a piping joint apparatus by straddling a tube over both piping plates becomes easy. Further, the tube can be easily replaced according to damage or the like.

  In the present invention, a work attachment provided with a boom that can be raised and lowered around a boom foot pin is attached to the front part of the base machine, and both the piping plates are attached to the side of the boom as the structure in the boom length direction. It is desirable that the plurality of tubes are mounted at intervals and arranged such that the tubes are arranged in a direction orthogonal to the boom length direction and straddle between the two pipe plates (claims 4 to 7).

  That is, when hydraulic piping is assembled as a work at a high place on the side of the boom of the work attachment, it is particularly advantageous in terms of improving the safety and workability of the piping work by using the pipe joint device of the present invention capable of sub-assembly. Become.

  In this case, when the boom is bent in the shape of a dogleg, it is preferable that the both pipe plates are attached to the side face of the boom in a state where both end pipe connection portions of the tubes face both sides of the bend of the boom. ).

  In this way, the piping direction change portion can be constituted by the sub-assembled pipe joint device, so that the piping work becomes particularly easy.

  In addition, it is desirable that the pipe connecting portions at both ends of each tube be positioned on a line inclined with respect to a straight line perpendicular to the boom length direction (Claims 6 and 7).

  By doing so, the pipe connecting parts at both ends of the adjacent tubes do not overlap each other, so that the hose connection work is simplified.

  In this case, it is desirable that the both-end pipe connection portions of the respective tubes are positioned on a line inclined in a direction closer to the pipe plate as the lower pipe connection portion (Claim 7).

  In this way, when the hoses are sequentially connected from the top, the high-level pipe connection portion is unlikely to become an obstacle when the low-level hose is connected, so that the hose connection work is further facilitated.

  On the other hand, it is desirable that at least one of the two pipe plates is provided with a pipe mounting seat to which additional pipes at the time of specification change are attached.

  If it carries out like this, a piping plate can be shared as a member for attaching additional piping at the time of a crane specification or a breaker specification, for example, and a structure can be simplified.

  According to the present invention, it is possible to improve the workability and appearance of the pipe by expanding the joint function in the pipe length direction while suppressing an increase in weight.

It is a perspective view showing the state where the piping joint device concerning the embodiment of the present invention was attached to the boom of the work attachment. FIG. 2 is an enlarged perspective view of a portion surrounded by a broken line in FIG. 1. It is a side view of FIG. FIG. 3 is a side view of FIG. 2. It is the VV line expanded sectional view of FIG. FIG. 6 is an enlarged sectional view taken along line VI-VI in FIG. 4. It is an expansion exploded perspective view of a pipe joint device. It is the assembly perspective view. It is a perspective view of the state where the additional piping at the time of breaker specification was attached. It is the same expanded side view. It is a perspective view of the state where the additional piping at the time of crane specification was attached. It is the same expanded side view. 1 is a schematic side view of an offset excavator to which the present invention is applied.

  The embodiment is applied to an offset excavator.

  In the following embodiments, the basic configuration related to the excavator and its work attachment is the same as that of the prior art shown in FIG. 13, and the common parts are denoted by the same reference numerals as those in FIG. To do.

  The pipe joint device A according to the embodiment is attached to the outer surface of a rear boom 5a that constitutes an offset boom 5 that is bent in a U-shape as shown in FIGS.

  The pipe joint device A includes a pair of pipe plates 21 and 22 attached to the outer surface of the rear boom at intervals in the pipe length direction (boom length direction), and both pipe plates 21 in a state aligned in the pipe radial direction. 22, which are constituted by a plurality of tubes (steel pipes) 23 attached across the pipes 23, and pipe connection portions 23 a and 23 b (complexity of the drawing) in which hydraulic pipes (usually hydraulic hoses) are connected to both ends of each tube 23. In order to avoid this, only the symbols in FIGS. 4, 7, and 8 are provided.

  Hereinafter, the piping plate 21 attached to the front end side of the rear boom 5a is referred to as a “front end side piping plate”, and the other piping plate 22 is referred to as a “base end side piping plate”.

  Further, in the rear boom 5a and the pipe joint A, the direction perpendicular to the rear boom length direction is referred to as a “height direction” as necessary. It is called “low side”.

  The distal end side piping plate 21 includes a rectangular plate body 24 having a long side close to the height of the rear boom 5a, and a tube mounting clamp device.

  The clamp device includes a plurality (three in the figure) of clamp seats 25 attached at intervals in the long side direction of the plate body 24, and clamps two tubes 23 between each clamp seat 25. The holding member 26 to be fixed and a fastening bolt 27 for fastening the central portion of the holding member 26 are configured.

  Further, mounting bolts 28 are inserted into the plate main body 24 at a plurality of positions, and the mounting bolts 28 are screwed into pipe plate mounting seats (see FIGS. 2 and 5) 29 provided on the upper side surface of the rear boom 5a. The side piping plate 21 is detachably attached to the upper side surface of the rear boom 5a.

  Further, when an additional pipe mounting seat 30 for the breaker specification is provided at the higher end of the plate body 24 as a position not interfering with the tube 23, when the excavator is used in the breaker specification, FIGS. As shown, the additional pipe 31 for the breaker is fixed to the additional pipe mounting seat 30 by, for example, a clamping device similar to the clamping device for both the piping plates 21 and 22.

  The proximal end side piping plate 22 includes a rectangular plate body 32 having a long side close to the height of the rear boom 5a, and a tube mounting clamp device.

  The clamp device is similar to the clamp device of the distal end side piping plate 21, and a plurality of (three in the figure) clamp seats 33 attached at intervals in the long side direction of the plate body 32, A holding member 34 that clamps and fixes two tubes 23 at a time between them, and a tightening bolt 35 that tightens the central portion of the pressing member 34.

  Further, mounting bolts 36 are inserted into a plurality of locations of the plate main body 32, and the mounting bolts 36 are screwed into pipe plate mounting seats 37 (see FIGS. 2 and 6) provided on the side surface of the rear boom 5a. The proximal end side piping plate 22 is detachably attached to the intermediate side surface of the rear boom 5a.

  Further, when two cylindrical members 38, 38 serving as additional pipe mounting seats are provided on the plate main body 24 so as to project outward without interfering with the tube 23, the excavator is used in a crane specification. , 12, a pipe connection member 40 for attaching the holding valve pipe 39 is attached across both columnar members 38, 38.

  As shown in FIGS. 7 and 8, the pipe joint apparatus A is assembled by clamping the tube 23 between the plates 21 and 22 as a so-called sub-assembly, and in this assembled state, as shown in FIGS. Mounted on the rear boom outer surface.

  Then, regular hydraulic pipes (hoses) 41 and 42 shown in FIG. 2 are connected to the pipe connection portions 23a and 23b at both ends of each tube in the pipe joint apparatus A.

  Here, in the pipe joint apparatus A, as shown in the drawing, both pipe plates 21 and 22 are attached to the side surface of the rear boom in a state in which both end pipe connection portions 23a and 23b of each tube 23 face both sides of the bending of the rear boom 5a.

  In this case, as shown in FIG. 4, the pipe ends 23a and 23b of each tube 23 are inclined to the straight line perpendicular to the boom length direction, preferably lower pipe connections 23a and 23b. It is located on the lines L1 and L2 inclined in the direction approaching the plates 21 and 22 (plate main bodies 24 and 32).

  The lines L1 and L2 are usually straight lines as shown in the figure, but may be curves that gently curve along the straight lines.

  Further, as described above, when the excavator is used in the breaker specification, the distal end side of the breaker additional pipe 31 is clamped, for example, to the additional pipe mounting seat 30 of the distal end side pipe plate 21 (see FIGS. 9 and 10). ).

  Further, when the excavator is used in a crane specification, a pipe connecting member 40 is attached to the columnar members 38 of the proximal end side pipe plate 22, and a holding valve pipe 39 is connected to the member 40 (FIG. 11). , 12).

  In this way, since the pipe joint device A is configured by straddling the tube 23 between the both side pipe plates 21 and 22, even if the overall length of the device is long, the weight increase is only for the tube.

  That is, the joint function can be expanded in the pipe length direction while suppressing an increase in weight.

  This expansion of the joint function can basically improve the workability of the piping, improve the appearance of the entire piping, and omit the cover for blindfolding.

  In this case, the entire pipe joint device A is assembled in a sub-assembly, and after this is assembled to the rear boom 5a, a procedure for connecting the pipes 41 and 42 such as hydraulic hoses to the pipe connection portions 23a and 23b of the tubes 23 is taken. Therefore, the piping workability can be further improved, and the safety of the boom piping work that is a work at a high place can be improved.

  In addition, the following effects can be obtained.

  I) Since both pipe plates 21 and 22 are attached to the side of the boom in a state in which the pipe connection parts 23a and 23b at both ends of each tube 23 face both sides of the bend of the rear boom 5a, the pipe direction change portion is a sub-set pipe joint. Being configured by the device A further facilitates piping work.

  II) Since both end pipe connection portions 23a and 23b of each tube 23 are positioned on straight lines L1 and L2 inclined with respect to a straight line perpendicular to the boom length direction, both end pipe connections of adjacent tubes 23 and 23 are made. The parts do not overlap each other. This simplifies the hose connection work.

  In this case, the straight lines L1 and L2 are inclined so that the lower pipe connection portions 23a and 23b are closer to the pipe plates 21 and 22, so when connecting the hoses sequentially from the top, Since the high-level piping connection portion is not easily disturbed, the hose connection work is further facilitated.

  III) Additional piping mounting seat 30 on which the additional piping 31 at the time of the breaker specification is attached to the distal end side piping plate 21, and additional piping mounting seat at which the additional piping (the holding valve piping) 39 at the time of crane specification is attached to the proximal end side piping plate 22. Therefore, the pipe plates 21 and 22 can be commonly used as attachment members for additional pipes when the specifications are changed, and the structure can be simplified.

Other embodiments
(1) The pipe connection portions 23a and 23b at both ends of the tube may be positioned on an inclined line opposite to the inclined lines L1 and L2 shown in FIG.

  (2) The means for attaching both ends of the tube 23 to both the piping plates 21 and 22 is not limited to the clamping device described in the above embodiment, and for example, one tube or a plurality of tubes are covered with saddle-shaped metal fittings. A means for bolting the piping plates 21 and 22 may be used.

  (3) The present invention is not limited to the rear boom pipe of an offset type excavator, and when the front boom pipe or the arm pipe is an exposed pipe, the excavator other than the offset type excavator or the work attachment pipe of a construction machine other than the excavator is used. As above.

  Moreover, it is applicable not only to work attachment piping but also to base machine piping.

DESCRIPTION OF SYMBOLS 1 Lower traveling body which comprises base machine 2 Same, upper turning body 3 Work attachment 5 Boom of work attachment 5a Rear boom which comprises boom 5b Same as above Front boom 5c Upper boom 7 Arm which constitutes work attachment 9 Bucket 12 Boom Cylinder 13 Arm cylinder H Hydraulic piping A Piping joint device 21 Leading side piping plate 22 constituting the pipe fitting device Same as above, proximal end piping plate 23 Tube 23a, 23b Piping connection 24 Plate body of leading end side piping plate 25 Clamp device Constructing clamp seat 26 Same holding member 27 Same tightening bolt 28 Plate mounting bolt L1, L2 Inclined line 30 Additional piping mounting seat 31 Additional piping 32 Plate body of proximal piping plate 33 Configure clamp device Clamp seat 34 same, regular pipes connected presser member 35 the same, the holding valve pipe 40 pipe connector 41 pipe connecting portion as the cylindrical member 39 additional piping as clamping bolts 36 plate mounting bolts 38 additional piping installation seat

Claims (8)

  A pipe joint device for routing a plurality of hydraulic pipes arranged in the diameter direction along a structure of a construction machine, and a pair of pipe plates attached to the structure at intervals in the pipe length direction And a plurality of tubes mounted across both the piping plates, and a pipe connecting portion to which piping such as a hose is connected to both ends in the longitudinal direction of the tube. Piping joint device.   2. The pipe joint device for a construction machine according to claim 1, wherein the structure is provided with a pipe plate mounting seat for detachably bolting both pipe plates.   3. The pipe joint device for a construction machine according to claim 1 or 2, wherein a clamp device is provided on both the pipe plates so as to detachably attach both ends of the tube.   At the front of the base machine, a work attachment equipped with a boom that can be raised and lowered centering on the boom foot pin is attached, and both the piping plates are spaced apart in the boom length direction on the side of the boom as the structure. The construction according to any one of claims 1 to 3, wherein the plurality of tubes are arranged in a direction orthogonal to the boom length direction so as to straddle between the two pipe plates. Pipe joint device for machinery.   5. The boom is shaped like a dogleg, and the both pipe plates are attached to the side of the boom in a state in which both end pipe connecting portions of the tubes face both sides of the boom. Piping equipment for construction machinery.   6. The pipe joint device for a construction machine according to claim 4, wherein both end pipe connection portions of each tube are positioned on a line inclined with respect to a straight line perpendicular to the boom length direction.   7. The pipe joint device for a construction machine according to claim 6, wherein the pipe connecting portions at both ends of each tube are positioned on a line inclined in a direction closer to the piping plate as a lower pipe connecting portion.   The construction machine according to any one of claims 1 to 7, wherein an additional piping mounting seat to which additional piping at the time of specification change is mounted is provided on at least one of the two piping plates. Piping joint device.

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