JP2012067580A - Work device of construction machine - Google Patents

Work device of construction machine Download PDF

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Publication number
JP2012067580A
JP2012067580A JP2011082015A JP2011082015A JP2012067580A JP 2012067580 A JP2012067580 A JP 2012067580A JP 2011082015 A JP2011082015 A JP 2011082015A JP 2011082015 A JP2011082015 A JP 2011082015A JP 2012067580 A JP2012067580 A JP 2012067580A
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Prior art keywords
pipe
fixed pipe
portion
fixed
boom
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JP2011082015A
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JP5611881B2 (en
Inventor
Osamu Gokita
Katsumi Shimizu
Takayuki Shimodaira
貴之 下平
修 五木田
勝美 清水
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Hitachi Constr Mach Co Ltd
日立建機株式会社
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Application filed by Hitachi Constr Mach Co Ltd, 日立建機株式会社 filed Critical Hitachi Constr Mach Co Ltd
Priority to JP2011082015A priority patent/JP5611881B2/en
Publication of JP2012067580A publication Critical patent/JP2012067580A/en
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Abstract

PROBLEM TO BE SOLVED: To stably bind fixed piping to a boom by a plurality of clamp members, to suppress damage of the respective clamp members and to improve reliability and durability.SOLUTION: Binding force fixing clamp members 25 and 30 capable of keeping binding force to fixed piping 20 and 22 fixed are positioned and provided near the connection parts 20A, 22A and 22B of the fixed piping 20 and 22 with flexible hoses 23 and 24, and binding force variable clamp members 35 and 39 capable of varying the binding force of the fixed piping 20 and 22 corresponding to the tightening force of bolts 29 and 34 are positioned and provided at the intermediate part in the length direction of a boom 12 separated from the connection parts 20A, 22A and 22B. Thus, the binding force fixing clamp members 25 and 30 parry the displacement of the fixed piping 20 and 22, and the binding force variable clamp members 35 and 39 surely bind the fixed piping 20 and 22 with large binding force.

Description

  The present invention relates to a working device for a construction machine that performs various kinds of work, for example, by extending and contracting a hydraulic cylinder.

  In general, a working device mounted on a hydraulic excavator as a construction machine includes a boom attached to the front side of a revolving frame so as to be able to move up and down, an arm attached to the front end side of the boom so as to be rotatable, A bucket rotatably attached to the distal end side, a boom cylinder provided between the revolving frame and the boom for raising and lowering the boom, and the boom and arm for rotating the arm Are roughly constituted by an arm cylinder provided between the arm and a bucket cylinder provided between the arm and the bucket for rotating the bucket.

  On the upper surface side of the boom, for example, four pipes for supplying and discharging pressure oil to and from the arm cylinder and bucket cylinder are provided, and these four pipes extend in the length direction of the boom. It is formed as a flexible fixed pipe (metal pipe). Further, a flexible hose for allowing the operation of the boom or arm is connected to the end of the fixed pipe. Moreover, the flexible hose connected to each fixed pipe on the foot part side of the boom is connected to a control valve device on the turning frame. On the other hand, the flexible hose connected to each fixed pipe on the tip side of the boom is connected to the bucket cylinder.

  Furthermore, the work device is provided with clamp members for attaching the fixed pipe to the upper surface side of the boom, and the clamp members are arranged at a plurality of positions at intervals in the length direction of the hydraulic pipe.

  Here, each clamp member sandwiches a fixed pipe between the boom-side pipe receiving part and the holding member facing the pipe receiving part, and in this state, pushes the holding member toward the pipe receiving part using bolts. By attaching, fixed piping is attached to the boom side. At this time, by interposing a gap between the pipe receiving part and the holding member, the restraining force of the fixed pipe can be made variable according to the bolt tightening force. Thereby, each clamp member can restrain firmly fixed piping so that it may not shift to an axial direction by bolting (for example, refer to patent documents 1).

JP 2008-25186 A

  By the way, according to the above-described prior art, the fixed pipe can be firmly restrained by the clamp member provided on the boom. However, when the boom is raised or lowered or the arm is rotated, the flexible hose is deformed, and the reaction force due to this deformation acts on the fixed pipe. In addition, a load acts on the fixed pipe also when each flexible hose swings to the left, right, or the like during traveling or working.

  In this case, in the invention of Patent Document 1, since the fixed pipe is firmly restrained by all the clamp members, a load acting on the fixed pipe also acts on the clamp member. In particular, since a large load acts directly on the clamp member disposed at a position close to the flexible hose, a bending load or the like acts on a bolt or the like that fixes the fixed pipe at this position. There is a problem that bolts and the like are damaged.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to stably restrain a fixed pipe on a boom by each clamp member and to suppress damage to each clamp member. An object of the present invention is to provide a construction machine working device capable of improving the performance and durability.

  A working device for a construction machine according to the present invention includes a boom that is attached to a vehicle body of the construction machine so as to be able to move up and down, an arm that is rotatably attached to the tip of the boom, and a pivot that can be turned to the tip of the arm. A work tool attached to the vehicle body, a boom cylinder provided between the vehicle body and the boom, an arm cylinder provided between the boom and the arm, and provided between the arm and the work tool. A work tool cylinder; a non-flexible fixed pipe provided extending in the length direction of the boom; a flexible hose provided to connect to the fixed pipe and permitting the operation of the boom or arm; A plurality of clamp members disposed between the boom and the fixed pipe at intervals in the length direction of the fixed pipe for attaching the fixed pipe to the boom; A pipe receiving part provided on the pipe, a holding member provided facing the pipe receiving part to hold the fixed pipe between the pipe receiving part, and the holding member in a state of holding the fixed pipe And a bolt that is pressed and fixed to the pipe receiving part side.

  In order to solve the above-described problem, the invention adopts the feature of the structure of the first aspect in that the plurality of clamp members are connected to the pipe receiving portion when the bolt is tightened across the fixed pipe. A clamping force variable clamping member capable of varying the clamping force of the fixed pipe according to the clamping force of the bolt by interposing a gap with the clamping member, and the bolt sandwiching the fixed pipe Consists of two types of combination with a clamping force constant clamping member that can keep the restraining force to the fixed pipe constant by making no gap between the pipe receiving part and the clamping member when tightened. It is to have done.

  According to a second aspect of the present invention, the clamp force constant clamp member is provided in the vicinity of a connection site with the flexible hose of the fixed pipe, and the clamp force variable clamp member is arranged in the length direction of the boom. It is in the structure which is located in the middle part of.

  According to the invention of claim 3, the pipe receiving part and the clamping member of the constant clamping force clamping member respectively include a curved plate-like semi-cylindrical part for clamping the fixed pipe, and the semi-cylindrical part of the pipe receiving part And / or the semi-cylindrical portion of the clamping member is provided with two end-side edge portions which are located on both ends in the length direction of the fixed pipe and are in contact with the fixed pipe, respectively, and an intermediate portion of the fixed pipe And an intermediate edge portion that is in contact with the fixed pipe.

  According to the invention of claim 4, the semi-cylindrical portion of the pipe receiving portion and / or the semi-cylindrical portion of the clamping member is provided with a through-hole penetrating in the thickness direction, and the intermediate edge portion is the through-hole. It is formed in the opening part.

  According to the invention of claim 5, the semi-cylindrical part of the pipe receiving part and / or the semi-cylindrical part of the clamping member is located on the contact surface side in contact with the fixed pipe and has an arithmetic average roughness Ra of 3 A contact surface portion having a surface roughness of 5 to 10.0 is formed.

  According to the invention of claim 6, the semi-cylindrical part of the pipe receiving part and / or the semi-cylindrical part of the clamping member is located on the contact surface side in contact with the fixed pipe and prevents the fixed pipe from slipping. Anti-slip material to be applied is applied.

  According to the first aspect of the present invention, among the plurality of clamp members, the variable clamping force clamp member interposes a gap between the pipe receiving portion and the clamping member when the bolt is tightened with the fixed pipe interposed therebetween. be able to. Thereby, the restraint force variable clamp member can restrain the fixed pipe with a large restraint force by tightening the bolt.

  On the other hand, the clamp member with a constant restraining force can be in a state where there is no gap between the pipe receiving part and the holding member when the bolt is tightened with the fixed pipe interposed therebetween. As a result, the clamp member with a constant restraining force does not restrain the fixed pipe with a force exceeding a certain level even if the bolt is tightened, so the restraint force of the fixed pipe is weak and can be released without receiving a load from the fixed pipe. it can.

  Therefore, by arranging two types of clamp members, ie, a restraint force variable clamp member and a restraint force constant clamp member, in combination, the load varies depending on the position in the length direction of the fixed pipe, and according to the fixed state. The fixed piping can be restrained by the restraining force.

  As a result, the restraint force variable clamp member and the restraint force constant clamp member arranged at suitable positions can stably restrain the fixed pipe with respect to the boom. In addition, the load acting on each clamp member from the fixed pipe can be reduced, and damage to bolts and the like can be prevented. Thereby, the reliability with respect to durability and restraint performance of each clamp member can be improved.

  According to the second aspect of the present invention, the clamp member having a constant restraining force for restraining the fixed pipe with a constant restraining force is provided in the vicinity of the connection portion of the fixed pipe with the flexible hose. Even when the fixed pipe is displaced by the load when the is deformed, the clamp member with a constant binding force can allow the displacement of the fixed pipe.

  On the other hand, the variable clamping force clamping member that restrains the fixed pipe with a strong restraining force is located in the middle part of the boom in the longitudinal direction, so a large load from the fixed pipe is applied to the variable clamping force clamping member. There is no effect.

  Therefore, the clamping force variable clamp member provided at the intermediate portion in the boom length direction can be fixed so that the fixed pipe does not shift. In addition, the clamp member with a constant restraining force provided in the vicinity of the connection portion of the fixed pipe with the flexible hose can release the load from the fixed pipe and prevent damage to the bolts and the like.

  According to the third aspect of the present invention, the semi-cylindrical portion of the pipe receiving portion and / or the semi-cylindrical portion of the sandwiching member includes the end-side edge portions located at both ends in the length direction of the fixed piping, and the fixed piping. An intermediate edge portion located at an intermediate portion in the length direction was formed. In this case, the end side edge portion and the intermediate side edge portion have a higher contact pressure with respect to the fixed pipe than the other parts of the semi-cylindrical portion, and thus exert a large resistance force in the length direction of the fixed pipe. can do. For this reason, it can suppress that fixed piping moves to a length direction by an intermediate | middle edge part in addition to an edge part side edge part. As a result, compared with the case of only the edge portion on the end side, the effect of suppressing the displacement of the fixed pipe by the clamp member with the constant restraining force can be enhanced, so the number of clamp members with the constant restraining force can be reduced, and the manufacturing cost can be reduced. Can be reduced.

  According to the invention of claim 4, since the through-hole penetrating in the thickness direction is provided in the semi-cylindrical portion of the pipe receiving portion and / or the semi-cylindrical portion of the clamping member, the intermediate edge portion is provided at the opening portion of the through-hole. Can be formed. At this time, since the contact pressure with respect to the fixed pipe can be increased at the intermediate side edge part, the positional deviation of the fixed pipe can be suppressed by the intermediate side edge part.

  According to the invention of claim 5, since the contact surface portion is formed on the contact surface side in contact with the fixed pipe in the semi-cylindrical portion of the pipe receiving portion and / or the semi-cylindrical portion of the clamping member, The contact resistance between the cylindrical portion and the fixed pipe can be increased. For this reason, it is possible to enhance the effect of suppressing the displacement of the fixed pipe by the clamp member having a constant restraining force.

  According to the sixth aspect of the present invention, since the anti-slip material is applied to the semi-cylindrical portion of the pipe receiving portion and / or the semi-cylindrical portion of the clamping member on the contact surface side that contacts the fixed pipe, The contact resistance between the cylindrical portion and the fixed pipe can be increased. For this reason, it is possible to enhance the effect of suppressing the displacement of the fixed pipe by the clamp member having a constant restraining force.

It is a front view which shows the hydraulic shovel applied to the 1st Embodiment of this invention. It is a top view which shows a turning frame alone. It is a front view of the principal part expansion which shows the attachment state of the boom etc. with respect to a turning frame. It is a front view of the principal part expansion which shows the connection part of the boom and arm in FIG. It is a front view which expands and shows a boom, fixed piping, and each clamp member. It is an external appearance perspective view of the principal part expansion which shows the base end side of a boom, fixed piping, a flexible hose, and a clamp member. It is an external appearance perspective view of the principal part expansion which shows the front end side of a boom, fixed piping, a flexible hose, and a clamp member. It is a top view which expands and shows the 1st binding force constant clamp member arrange | positioned at the base end side of a boom. It is sectional drawing which looked at the 1st restraint force constant clamp member from the arrow IX-IX direction in FIG. It is a disassembled sectional view in the state which decomposed | disassembled the 1st binding force constant clamp member. It is sectional drawing which shows the 2nd clamping force constant clamp member arrange | positioned at the front end side of a boom. It is a disassembled sectional view in the state which decomposed | disassembled the 2nd binding force constant clamp member. It is a top view which expands and shows the 1st restraint force variable clamp member arrange | positioned in the intermediate part of the length direction of a boom near the base end side. It is sectional drawing which looked at the 1st restraint force variable clamp member from the arrow XIV-XIV direction in FIG. It is a disassembled sectional view in the state which decomposed | disassembled the 1st restraint force variable clamp member. It is sectional drawing which shows the 2nd restraint force variable clamp member arrange | positioned near the front end side in the intermediate part of the length direction of a boom. It is a disassembled sectional view in the state which decomposed | disassembled the 2nd restraint force variable clamp member. It is sectional drawing which shows the clamp force constant clamp member by the 1st modification of this invention. It is a disassembled perspective view which shows the state which decomposed | disassembled the 1st binding force constant clamp member by the 2nd Embodiment of this invention. It is a top view which expands and shows the 1st binding force constant clamp member in FIG. It is sectional drawing which looked at the 1st clamp force constant clamp member from the arrow XXI-XXI direction in FIG. It is a perspective view which shows the piping receiving part in FIG. 19 alone. It is a perspective view which shows the clamping member in FIG. 19 alone. It is a disassembled perspective view shown in the state which decomposed | disassembled the 2nd clamping force constant clamp member by the 2nd Embodiment of this invention. It is a front view which expands and shows the 2nd binding force constant clamp member in FIG. It is sectional drawing which looked at the 2nd clamp force constant clamp member from the arrow XXVI-XXVI direction in FIG. It is a perspective view which shows the piping receiving part in FIG. 24 alone. It is a perspective view which shows the clamping member in FIG. 24 alone. It is a front view which expands and shows the 2nd clamping force constant clamp member by the 3rd Embodiment of this invention. FIG. 30 is a cross-sectional view of the second restraining force constant clamping member as seen from the direction of arrows XXX-XXX in FIG. 29. It is a perspective view which shows the piping receiving part in FIG. 29 alone. It is a front view which expands and shows the 2nd clamping force constant clamp member by the 4th Embodiment of this invention. It is sectional drawing which looked at the 2nd restraint force constant clamp member from the arrow XXXIII-XXXIII direction in FIG. It is a perspective view which shows the piping receiving part in FIG. 32 alone. It is a front view which expands and shows the 2nd clamp force constant clamp member by the 2nd modification of this invention. It is a front view which expands and shows the 2nd clamping force constant clamp member by the 3rd modification of this invention. It is a front view which expands and shows the 2nd clamping force constant clamp member by the 4th modification of this invention. It is sectional drawing which looked at the 2nd restraint force constant clamp member from the arrow XXXVIII-XXXVIII direction in FIG.

  Hereinafter, a working device for a hydraulic excavator using a bucket as a work tool will be described as an example of a working device for a construction machine applied to an embodiment of the present invention, and will be described in detail with reference to the accompanying drawings.

  First, FIGS. 1 to 17 show a first embodiment. In FIG. 1, reference numeral 1 denotes a hydraulic excavator as a construction machine. The hydraulic excavator 1 is mounted on a self-propelled lower traveling body 2 and on the lower traveling body 2 so as to be able to turn. The upper revolving structure 3 which comprises and the working apparatus 11 mentioned later provided in the front side of this upper revolving structure 3 are comprised roughly.

  The upper swing body 3 includes a swing frame 4, a cab 5 mounted on the left front side of the swing frame 4, a counterweight 6 attached to the rear portion of the swing frame 4, an engine, a hydraulic pump, and a control valve. An exterior cover 7 is provided between the cab 5 and the counterweight 6 so as to cover a device or the like (none of which is shown).

  Here, as shown in FIG. 2, the swivel frame 4 is erected on a bottom plate 4A made of a thick steel plate or the like that extends in the front and rear directions, and on the bottom plate 4A, with a predetermined interval in the left and right directions. The left vertical plate 4B and the right vertical plate 4C extending in the rear direction, and the left side frame 4D and the right side frame 4E extending in the front and rear directions are arranged at intervals to the left and right of the vertical plates 4B and 4C. The base plate 4A and the vertical plates 4B and 4C project in the left and right directions, and are substantially constituted by a plurality of projecting beams 4F that support the left and right side frames 4D and 4E at the front ends thereof. Also, left and right cylinder brackets 4G (only the right side is shown) are provided on the front side of the vertical plates 4B and 4C.

  A working device 11 is provided on the front side of the revolving frame 4. Specifically, as shown in FIG. 3, the base end side of the boom 12 is attached to the front position of the left and right vertical plates 4B and 4C so that the boom 12 can be raised and lowered, and the boom cylinder 17 is attached to the left and right cylinder brackets 4G, respectively. It has been.

  Next, the structure of the working device 11 according to the present embodiment provided in the excavator 1 for performing excavation work of earth and sand will be described.

  Reference numeral 11 denotes a working device according to the present embodiment provided on the front side of the upper swing body 3. This working device 11 includes a boom 12, an arm 14, a bucket 16, a boom cylinder 17, an arm cylinder 18, a bucket cylinder 19, an arm cylinder fixed pipe 20, a bucket cylinder fixed pipe 22, a frame-side flexible hose 23, which will be described later. The bucket cylinder side flexible hose 24, the clamp members 25, 30, 35, 39 and the like are roughly configured. In addition, the boom 12 and the arm 14 of the working device 11 are described with names related to the upper and lower positions based on a posture in which the whole is extended to the front side.

  Reference numeral 12 denotes a boom whose base end is attached to the upper side of each of the vertical plates 4B and 4C of the revolving frame 4 so as to be able to move up and down. As shown in FIGS. 5 to 7, the boom 12 includes an upper flange 12A that forms an upper surface, a lower flange 12B that forms a lower surface, and a left web 12C that forms a left side surface (illustrated by a dotted line in FIG. 6). The right web 12D forming the right side surface is formed as a box structure having a square cross section. That is, the boom 12 has a substantially L-shaped left web 12C and a right web 12D arranged in parallel, and the upper flange 12A and the lower flange so as to sandwich the left web 12C and the right web 12D from above and below. It is formed in a square cylinder shape by disposing 12B and applying welding means.

  Further, as shown in FIG. 6, a connecting cylinder 12 </ b> F is provided on the base end portion 12 </ b> E side that is a foot portion of the boom 12 so as to extend in the left and right directions. And the base end part 12E of the boom 12 is attached to the left and right vertical plates 4B, 4C of the revolving frame 4 so that the connecting cylinder 12F can be rotated via a connecting pin 13 (see FIG. 3).

  On the other hand, as shown in FIG. 7, a pair of arm mounting brackets 12H on the left and right sides are provided on the distal end portion 12G side of the boom 12 so as to protrude substantially in parallel. Each arm mounting bracket 12H is pivotally connected to a base end portion 14A side of an arm 14 described later so as to be rotatable.

  Further, the intermediate portion in the length direction of the boom 12 is around the bent portion, and the rod 17B of the boom cylinder 17 is attached to the substantially intermediate portion (bent portion) in the length direction of the left and right webs 12C and 12D. A boom cylinder mounting portion 12J is provided. Further, an arm cylinder mounting bracket 12K to which a tube 18A of the arm cylinder 18 is mounted is provided on the tip side of the bent portion of the upper flange 12A.

  Reference numeral 14 denotes an arm rotatably attached to the tip 12G side of the boom 12. The arm 14 is formed as a box structure having a quadrangular cross section, similar to the boom 12. In addition, the base end portion 14 </ b> A side of the arm 14 is pin-coupled so as to be rotatable via a support pin 15 between the arm mounting brackets 12 </ b> H of the boom 12. On the other hand, a bucket 16 is rotatably attached to the tip 14B of the arm 14.

  Further, an arm cylinder mounting bracket 14C is provided at the base end portion 14A of the arm 14, and a bucket cylinder mounting bracket 14D is provided at the distal end side of the arm cylinder mounting bracket 14C.

  Reference numeral 16 denotes a bucket (see FIG. 1) as a working tool that is rotatably attached to the tip of the arm 14. In this bucket 16, the link mechanism 16 </ b> A is connected to the tip of the rod 19 </ b> B of the bucket cylinder 19.

  Reference numeral 17 denotes two boom cylinders (only shown on the right side) provided between the revolving frame 4 and the boom 12. The boom cylinder 17 moves the boom 12 up and down with respect to the revolving frame 4. The boom cylinder 17 has a base end portion of the tube 17A attached to the cylinder bracket 4G of the revolving frame 4 so as to be rotatable, and a tip end portion of the rod 17B attached to the boom cylinder attachment portion 12J of the boom 12 so as to be rotatable. ing.

  Reference numeral 18 denotes an arm cylinder located on the upper flange 12A of the boom 12 and provided between the boom 12 and the arm 14. The arm cylinder 18 rotates the arm 14 with respect to the boom 12. The arm cylinder 18 is attached so that the base end portion of the tube 18A is pivotably attached to the arm cylinder mounting bracket 12K of the boom 12, and the tip end portion of the rod 18B is pivotally attached to the arm cylinder mounting bracket 14C of the arm 14. It has been.

  Reference numeral 19 denotes a bucket cylinder located between the arm 14 and the bucket 16 on the upper surface side of the arm 14. The bucket cylinder 19 rotates the bucket 16 at the tip of the arm 14. The bucket cylinder 19 has a proximal end portion of the tube 19A rotatably attached to the bucket cylinder mounting bracket 14D of the arm 14, and a distal end portion of the rod 19B rotatably attached to the link mechanism 16A of the bucket 16. Yes.

  Next, the configuration of the fixed pipes 20 and 22 and the flexible hoses 21, 23 and 24 for supplying and discharging the pressure oil (hydraulic oil) from the control valve device (not shown) to the arm cylinder 18 and the bucket cylinder 19 will be described. .

  First, reference numeral 20 denotes two arm cylinder fixed pipes extending on the upper flange 12A of the boom 12 in the length direction of the boom 12. The two fixed pipes 20 are made of, for example, inflexible metal pipes, are arranged on the left side on the base end portion 12E side of the boom 12, and are formed so as to extend toward the front end side after being bent toward the center. ing. Further, the base end side of each arm cylinder fixed pipe 20 is a connection portion 20A to which the frame side flexible hose 23 is connected, and the tip end side extends to an intermediate position of the boom 12. And the front end side of each arm cylinder fixed piping 20 is connected to the tube 18A of the arm cylinder 18 via the arm cylinder side flexible hose 21, as shown in FIG.

  Reference numeral 22 denotes two bucket cylinder fixed pipes provided on the upper flange 12 </ b> A of the boom 12 so as to be aligned with the arm cylinder fixed pipes 20. The two fixed pipes 22 are made of, for example, non-flexible metal pipes, are arranged on the right side on the base end portion 12E side of the boom 12, and extend toward the front end side after being separated in the left and right directions. It is bent. Further, the base end side of each bucket cylinder fixed pipe 22 is a connection part 22A to which the frame side flexible hose 23 is connected.

  Further, an intermediate portion of each bucket cylinder fixed pipe 22 extends toward the front end side so as to be arranged on the left and right sides of each arm cylinder fixed pipe 20. Further, as shown in FIG. 4, the tip end side of each bucket cylinder fixed pipe 22 becomes a connection portion 22 </ b> B to which the bucket cylinder side flexible hose 24 is connected, and the bucket cylinder side flexible hose 24 is connected to the bucket cylinder. It is connected to 19 tubes 19A.

  Reference numeral 23 denotes a plurality of, for example, four frame-side flexible hoses provided on the base end portion 12E side of the boom 12 (see FIG. 6). The four frame-side flexible hoses 23 connect the control valve device mounted on the swing frame 4 to the two arm cylinder fixed pipes 20 and the bucket cylinder fixed pipe 22. Each frame-side flexible hose 23 is connected to the control valve device at one end side with a substantially Ω-shaped slack on the upper side in order to allow the boom 12 to move up and down with respect to the revolving frame 4 and the other end. The side is connected to the connection parts 20A and 22A of the fixed pipes 20 and 22, respectively.

  Here, the frame-side flexible hose 23 can allow the operation of the boom 12 by bending when the boom 12 moves up and down. However, since the frame side flexible hose 23 has a strength that can withstand high pressure, a large force is required to bend. Therefore, when the frame-side flexible hose 23 is bent, an equivalent load acts on the fixed pipes 20 and 22.

  Reference numeral 24 denotes a plurality of, for example, two bucket cylinder side flexible hoses provided on the tip 12G side of the boom 12 (see FIG. 7 and the like). The two bucket cylinder side flexible hoses 24 connect the bucket cylinder fixed pipe 22 and the tube 19 </ b> A of the bucket cylinder 19. In addition, each bucket cylinder side flexible hose 24 is connected to a connection portion 22B of each fixed pipe 22 at one end side with a substantially S-shaped slack in order to allow the arm 14 to rotate with respect to the boom 12. The other end is connected to the tube 19 </ b> A of the bucket cylinder 19.

  Here, the bucket cylinder side flexible hose 24 can permit the operation of the arm 14 by bending when the arm 14 rotates. However, since the bucket cylinder side flexible hose 24 has a strength that can withstand high pressure in substantially the same manner as the frame side flexible hose 23 described above, a large force is required to bend. Therefore, when the bucket cylinder side flexible hose 24 is bent, an equivalent load is applied to the tip side of each fixed pipe 22.

  Next, in order to attach each fixed pipe 20, 22 to the boom 12, a plurality of plural pipes arranged between the boom 12 and the fixed pipe 20, 22 are spaced in the length direction of each fixed pipe 20, 22. The clamp members 25, 30, 35, and 39 will be described with reference to FIGS.

  Reference numeral 25 denotes a first restraining force constant clamping member provided on the base end portion 12E side of the boom 12 so as to be spaced apart in the left and right directions (see FIGS. 5 and 6). The first restraining force constant clamping member 25 is provided in the vicinity of the connection parts 20A, 22A of the fixed pipes 20, 22 to which the flexible hose 23 is connected. In addition, the arrangement position of the first restraining force constant clamp member 25 is a position where a large load is applied due to deformation or shaking of the flexible hose 23.

  The first restraining force constant clamping member 25 sandwiches the two fixed pipes 20 and 22. As shown in FIGS. 8 to 10, a column member 26, a pipe receiving part 27, and a sandwiching member 28 described later. The bolt 29 is configured. In the description of the configuration of the first constant clamping force clamp member 25, the right clamp member 25 that supports the bucket cylinder fixed pipe 22 is illustrated.

  Reference numeral 26 denotes a prism-like column member provided so as to protrude upward from the upper flange 12A of the boom 12, and a bolt 29 is screwed onto the upper end surface 26A of the column member 26 as shown in FIG. Screw holes 26B (only one is shown) are provided.

  Reference numeral 27 denotes a pipe receiving portion provided in contact with the upper end surface 26 </ b> A of the column member 26. The pipe receiving portion 27 is located at the center in the left and right directions and is provided with a quadrangular flat portion 27A that contacts the upper end surface 26A of the column member 26, and is curved on both the left and right sides of the flat portion 27A. The flat portion 27A is formed with two insertion holes 27C (only one is shown) corresponding to the screw holes 26B of the column member 26. Here, since the pipe receiving portion 27 is formed by bending an elastic metal plate, each semi-cylindrical portion 27B has an outer diameter shape or displacement (deformation) of the bucket cylinder fixed piping 22. It can be elastically deformed according to.

  Reference numeral 28 denotes a clamping member provided to face the pipe receiving portion 27 on the boom 12 side. The clamping member 28 clamps the fixed pipe 22 with the pipe receiving portion 27. Further, the clamping member 28 includes a rectangular flat portion 28A, a semi-cylindrical portion 28B that is provided on both the left and right sides of the flat portion 28A, and the flat portion 28A, as in the pipe receiving portion 27. And two insertion holes 28C (only one is shown). Further, like the pipe receiving portion 27, the clamping member 28 is formed of an elastic metal plate. In this case, the pipe receiving part 27 and the clamping member 28 can be reversed and used so as to face each other.

  And in the state which contact | abutted the flat part 27A of the piping receiving part 27, and the flat part 28A of the clamping member 28, the semi-cylindrical parts 27B and 28B which oppose form a cylindrical shape. For example, the inner diameter of the cylindrical portion is set to be equal to or slightly smaller than the outer diameter of the fixed pipe 22 so that the bucket cylinder fixed pipe 22 does not rattle.

  Reference numeral 29 denotes two bolts constituting the first restraining force constant clamping member 25. The two bolts 29 are inserted into the insertion hole 27C of the pipe receiving portion 27 and the insertion hole 28C of the holding member 28, and are screwed into the screw holes 26B of the support member 26, thereby sandwiching the bucket cylinder fixed pipe 22. In this state, the clamping member 28 is pressed and fixed to the pipe receiving portion 27 side.

  Here, as shown in FIG. 9, the first constant clamping force clamping member 25 is in a state where the flat portion 27A of the pipe receiving portion 27 and the flat portion 28A of the clamping member 28 are in contact, that is, the flat portion 27A, Since the bolt 29 is fixed in a state where there is no gap between the gaps 28A (gap size X = 0 mm), the bucket cylinder fixed pipe 22 can be held with a constant restraining force regardless of the tightening force of the bolt 29. .

  In this embodiment, the pipe receiving part 27 and the clamping member 28 are formed of an elastic metal plate. In addition, the inner diameter dimension of the cylindrical portion formed by facing the semi-cylindrical portion 27B of the pipe receiving portion 27 and the semi-cylindrical portion 28B of the holding member 28 is equal to or slightly smaller than the outer diameter dimension of the bucket cylinder fixed piping 22. Is set. Thereby, the first restraining force constant clamping member 25 can always restrain the bucket cylinder fixed pipe 22 at a predetermined position.

  On the other hand, when a load is applied to the bucket cylinder fixed pipe 22 and the fixed pipe 22 moves or bends, the semi-cylindrical portions 27B and 28B are moved according to the displacement of the fixed pipe 22 as shown in FIG. By elastically deforming in the directions indicated by arrows A and B, it is possible to allow the fixed pipe 22 to be displaced within each of the semi-cylindrical portions 27B and 28B, and to escape without receiving a large load.

  Reference numeral 30 denotes a second clamp member with a constant binding force provided on the left and right arm mounting brackets 12H on the tip 12G side of the boom 12 (see FIGS. 11 and 12). The second restraining force constant clamp member 30 is provided in the vicinity of the connection portion 22B of each fixed pipe 22 to which the bucket cylinder side flexible hose 24 is connected. Further, the second restraint force constant clamp member 30 is disposed in the same position as the first restraint force constant clamp member 25 described above, and a large load acts on the arrangement position due to deformation, shaking, etc. of the flexible hose 24. Is in position.

  The second constant clamping force clamping member 30 clamps one fixed pipe 22 and includes a support plate 31, a pipe receiving part 32, a clamping member 33, and a bolt 34, which will be described later, as shown in FIG. Has been. In the description of the configuration of the second restraining force constant clamp member 30, the right clamp member 30 is illustrated.

  31 is a rectangular support plate provided on the arm mounting bracket 12H of the boom 12 so as to extend upward, and the lower side of the support plate 31 is fixed to the outer surface of the arm mounting bracket 12H. Further, as shown in FIG. 12, two screw holes 31A (only one is shown) into which the bolts 34 are screwed are provided on the upper side of the support plate 31.

  Reference numeral 32 denotes a pipe receiving portion provided in contact with the upper position of the support plate 31. The pipe receiving portion 32 includes a rectangular flat portion 32A that abuts the outer surface of the support plate 31, and a semi-cylindrical portion 32B that is curved above the flat portion 32A. Are formed with two insertion holes 32 </ b> C (only one is shown) corresponding to the screw holes 31 </ b> A of the support plate 31. The pipe receiving part 32 is formed by bending an elastic metal plate, and each semi-cylindrical part 32B is elastic according to the outer diameter shape and displacement (deformation) of the bucket cylinder fixed pipe 22. It can be deformed.

  33 is a clamping member provided facing the pipe receiving part 32 on the boom 12 side, and the clamping member 33 clamps the fixed pipe 22 between the pipe receiving part 32. Further, the sandwiching member 33 is provided in the rectangular flat portion 33A, the semi-cylindrical portion 33B which is provided on the upper side of the flat portion 33A, and the flat portion 33A in substantially the same manner as the pipe receiving portion 32. And two insertion holes 33C (only one is shown). Further, like the pipe receiving portion 32, the clamping member 33 is formed of an elastic metal plate. In this case, the pipe receiving part 32 and the clamping member 33 can be reversed and used so as to face each other.

  And in the state which contact | abutted the flat part 32A of the pipe receiving part 32, and the flat part 33A of the clamping member 33, the semicylindrical parts 32B and 33B which oppose form a cylindrical shape. For example, the inner diameter of the cylindrical portion is set to be equal to or slightly smaller than the outer diameter of the fixed pipe 22 so that the bucket cylinder fixed pipe 22 does not rattle.

  Reference numeral 34 denotes two bolts constituting the second clamping member 30 with a constant binding force. The two bolts 34 are inserted into the insertion holes 32C of the pipe receiving portion 32 and the insertion holes 33C of the holding member 33, and are screwed into the screw holes 31A of the support plate 31, thereby sandwiching the bucket cylinder fixed pipe 22. In this state, the clamping member 33 is pressed and fixed to the pipe receiving portion 32 side.

  Here, as shown in FIG. 11, the second restraining force constant clamping member 30 is substantially the same as the first restraining force constant clamping member 25 described above, and the flat portion 32A of the pipe receiving portion 32 and the clamping member 33 are flat. Since it is fixed by the bolt 34 in a state in which the portion 33A is in contact (with no gap between the flat portions 27A, 28A), the fixed piping for the bucket cylinder has a constant restraining force regardless of the tightening force of the bolt 34. 22 can be held.

  In this embodiment, the pipe receiving part 32 and the clamping member 33 are formed of a metal plate having elasticity. In addition, the inner diameter dimension of the cylindrical portion formed by facing the semi-cylindrical portion 32B of the pipe receiving portion 32 and the semi-cylindrical portion 33B of the clamping member 33 is equal to or slightly smaller than the outer diameter dimension of the bucket cylinder fixed piping 22. Is set. Thereby, the second restraining force constant clamping member 30 can always restrain the bucket cylinder fixed pipe 22 at a predetermined position.

  On the other hand, when a load is applied to the bucket cylinder fixed pipe 22 and the fixed pipe 22 moves or bends, the semi-cylindrical portions 32B and 33B are moved according to the displacement of the fixed pipe 22 as shown in FIG. By elastically deforming in the directions indicated by arrows C and D in the middle, it is possible to allow the fixed pipe 22 to be displaced in the semi-cylindrical portions 32B and 33B, and to escape without receiving a large load.

  Reference numeral 35 denotes a first restraining force variable clamp member (see FIGS. 5 and 6) provided closer to the base end side in the middle portion of the boom 12 in the length direction (see FIGS. 5 and 6). Are arranged at a total of four locations (only three locations are shown), with two locations spaced in the length direction at positions separated in the left and right directions. The first restraining force variable clamp member 35 is provided at a position away from the connection sites 20A and 22A of the fixed pipes 20 and 22. Even when a large load is applied to each of the fixed pipes 20 and 22 due to deformation, shaking or the like of the flexible hose 23, the first restraining force variable clamp member 35 is disposed at a sufficiently small position. It has become a position.

  The first restraining force variable clamp member 35 sandwiches the two fixed pipes 20 and 22, and as shown in FIGS. 13 and 14, a pipe receiving portion 36, a sandwiching member 37, and a bolt 38, which will be described later. It is configured. In the description of the configuration of the first restraining force variable clamp member 35, the clamp member 35 on the right side of the boom 12 that supports the arm cylinder fixed pipe 20 and the bucket cylinder fixed pipe 22 one by one is illustrated.

  Reference numeral 36 denotes a pipe receiving portion provided on the upper flange 12 </ b> A of the boom 12. The pipe receiving portion 36 is formed in an inverted U shape by bending a rectangular plate body, and the upper side thereof is an abutting portion 36A on which the fixed pipes 20 and 22 abut. Further, at the center of the contact portion 36A, as shown in FIG. 15, a screw hole 36B into which the bolt 38 is screwed is provided.

  Reference numeral 37 denotes a clamping member provided so as to face the pipe receiving part 36 on the boom 12 side, and the clamping member 37 clamps the fixed pipes 20 and 22 between the pipe receiving part 36. The clamping member 37 is formed as a thick plate having rigidity that hardly deforms even if it is strongly tightened. And the clamping member 37 becomes press part 37A, 37B formed according to the diameter dimension of piping which the edge part of a length direction clamps, and it is the insertion hole 37C in the substantially center part between this press part 37A, 37B. Is formed. And the clamping member 37 has the clearance dimension Y between 36 A of contact parts of the pipe receiving part 36 in the position of the insertion hole 37C used as a fastening position, as shown in FIG.

  Reference numeral 38 denotes a bolt constituting the first restraining force variable clamp member 35. The bolt 38 is inserted into the insertion hole 37C of the clamping member 37 and screwed into the screw hole 36B of the pipe receiving portion 36, so that the clamping member 37 is sandwiched between the fixed piping 20 and 22 and the pipe receiving portion 36 side. It is fixed by pressing on.

  Here, the first restraining force variable clamp member 35 is configured such that the clamping member 37 is moved to the pipe receiving part 36 side by the bolt 38 in a state where the fixed pipes 20 and 22 are sandwiched between the pipe receiving part 36 and the holding member 37. The fixed pipes 20 and 22 are constrained by pressing. At this time, a gap Y is interposed between the pipe receiving portion 36 and the clamping member 37 so as not to limit the tightening amount. Accordingly, as shown in FIG. 14, the first restraining force variable clamp member 35 can retighten the bolt 38 by the gap Y, so that the fixed pipes 20 and 22 are moved in the directions of arrows E and F by the amount of retightening. Therefore, the restraining force can be changed according to the tightening condition of the bolt 38. Thereby, the position of the first restraining force variable clamp member 35 can be fixed so that the fixed pipes 20 and 22 are not displaced in the length direction.

  39 is a second restraining force variable clamp member provided near the front end side in the middle portion of the boom 12 in the length direction (see FIGS. 5 and 7). These are disposed at two positions spaced in the left and right directions, with a distance in the length direction, for a total of four positions (only three positions are shown). Further, the second restraining force variable clamp member 39 is provided at a position away from the connection site 22 </ b> B of each fixed pipe 22. Even when a large load is applied to each fixed pipe 22 due to deformation, shaking, etc. of the bucket cylinder side flexible hose 24, the second restraining force variable clamp member 39 is disposed sufficiently. It is a position to become smaller.

  The second restraining force variable clamp member 39 sandwiches one fixed pipe 22 and includes a pipe receiving portion 40, a sandwiching member 41, and a bolt 42, which will be described later, as shown in FIG. In the description of the configuration of the second restraining force variable clamp member 39, the right clamp member 39 is illustrated.

  Reference numeral 40 denotes a pipe receiving portion provided on the upper flange 12 </ b> A of the boom 12. The pipe receiving portion 40 is formed in an inverted U shape by bending a rectangular plate body, almost the same as the pipe receiving portion 36 of the first restraining force variable clamp member 35 described above, and its upper side is fixed. It is an abutting portion 40A with which the pipe 22 and the like abut. Further, as shown in FIG. 17, a screw hole 40B into which the bolt 42 is screwed is provided in the center of the contact portion 40A.

  41 is a clamping member provided to face the pipe receiving part 40 on the boom 12 side, and the clamping member 41 clamps the fixed pipe 22 between the pipe receiving part 40. Further, the sandwiching member 41 is formed as a thick plate having rigidity that hardly deforms even if it is strongly tightened, in the same manner as the sandwiching member 37. The clamping member 41 has a fulcrum projection 41A with one end in the length direction protruding downward (toward the pipe receiving portion 40), and a pressing portion 41B opposite to the fulcrum projection 41A in the length direction. An insertion hole 41C is formed in a substantially central portion between the fulcrum protrusion 41A and the pressing portion 41B. And the clamping member 41 has the clearance dimension Y 'between the pipe receiving parts 40 in the position of the insertion hole 41C used as a fastening position, as shown in FIG.

  Reference numeral 42 denotes a bolt constituting the second restraining force variable clamp member 39. The bolt 42 is inserted into the insertion hole 41 </ b> C of the clamping member 41 and is screwed into the screw hole 40 </ b> B of the pipe receiving part 40, thereby pressing the clamping member 41 toward the pipe receiving part 40 with the fixed pipe 22 being sandwiched. To fix.

  Here, the second restraining force variable clamp member 39 is in a state in which the fixed pipe 22 is sandwiched between the pipe receiving portion 40 and the sandwiching member 41 in substantially the same manner as the first restraining force variable clamp member 35 described above. The fixed pipe 22 is constrained by pressing the clamping member 41 to the pipe receiving portion 40 side with the bolts 42. At this time, a gap Y ′ is interposed between the pipe receiving part 40 and the clamping member 41 so as not to limit the tightening amount. Accordingly, as shown in FIG. 16, the second variable clamping force member 39 can retighten the bolts 42 with the gap Y ′ in the same manner as the first variable clamping force member 35. The fixed pipe 22 can be strongly restrained from the directions indicated by arrows G and H by the amount, and the restraining force can be changed according to the tightening condition of the bolt 42. Thereby, the position of the second restraining force variable clamp member 39 can be fixed so that the fixed pipe 22 is not displaced in the length direction.

  The working device 11 of the excavator 1 applied to the present embodiment has the above-described configuration, and the operation thereof will be described next.

  First, the operator can travel the lower traveling body 2 by boarding the cab 5 and operating the operating lever and pedal for traveling among various operating levers and pedals (all not shown). . Further, the operator can operate the boom 12, the arm 14, and the bucket 16 of the work device 11 by operating a work operation lever, and can perform, for example, excavation work of earth and sand.

  When the hydraulic excavator 1 travels and excavation work is performed by the work device 11, the flexible hoses 23 and 24 are bent or shaken. In this case, the flexible hoses 23 and 24 circulate high-pressure hydraulic oil, and thus have a multilayer structure including a metal material. For this reason, when the flexible hoses 23 and 24 are bent or shaken to change the shape, a large load is generated. The load when the flexible hoses 23 and 24 are deformed acts on the fixed pipes 20 and 22 connected to the clamp members 25, 30, 35 and 39 that restrain the fixed pipes 20 and 22. May also work.

  However, according to the present embodiment, in order to attach the arm cylinder fixed pipe 20 and the bucket cylinder fixed pipe 22 to the boom 12, the boom 12 and the boom 12 are spaced apart in the length direction of the fixed pipes 20, 22. A plurality of clamp members 25, 30, 35, 39 are provided between the fixed pipes 20, 22, and the plurality of clamp members 25, 30, 35, 39 are bolts across the fixed pipes 20, 22. When the terminals 29 and 34 are tightened, there is no gap between the pipe receiving portions 27 and 32 and the sandwiching members 28 and 33 (gap size X = 0 mm), whereby the restraining force on the fixed pipes 20 and 22 is increased. The clamping members 25 and 30 having a constant restraining force that can be kept constant and the bolts 38 and 42 between the pipe receiving portions 36 and 40 and the clamping members 37 and 41 when the fixed pipes 20 and 22 are clamped. By interposing the gaps Y and Y ′, the restraining force variable clamping members 35 and 39 that can vary the restraining force of the fixed pipes 20 and 22 in accordance with the tightening force of the bolts 38 and 42. It consists of a combination of types.

  On this basis, the clamping members 25 and 30 having a constant restraining force are provided in the vicinity of the connection parts 20A, 22A and 22B with the flexible hoses 23 and 24 of the fixed pipes 20 and 22. As a result, the clamp members 25 and 30 with a constant restraining force do not strongly restrain the fixed pipes 20 and 22, and therefore allow the displacement of the fixed pipes 20 and 22 without receiving a load from the fixed pipes 20 and 22. Can do.

  On the other hand, the clamping force variable clamp members 35 and 39 are configured to be provided in the middle portion in the length direction of the boom 12 apart from the connection sites 20A, 22A, and 22B. Thereby, the restraining force variable clamp members 35 and 39 fasten the bolts 38 and 42 with the fixed pipes 20 and 22 interposed therebetween, thereby restraining the fixed pipes 20 and 22 with a large restraining force according to the tightening force. Can do.

  As a result, the restraining force variable clamp members 35 and 39 provided at the intermediate portion in the length direction of the boom 12 can be fixed so that the fixed pipes 20 and 22 are not displaced. In addition, the clamp members 25 and 30 with constant binding force provided in the vicinity of the connecting portions 20A, 22A and 22B of the fixed pipes 20 and 22 with the flexible hoses 23 and 24 release the load and damage the bolts 29 and 34. Can be prevented. Thereby, durability with respect to each clamp member 25, 30, 35, 39, and the reliability with respect to restraint performance can be improved.

  In the first embodiment, the first fixed clamping force member 25 is disposed between the semi-cylindrical portion 27B of the pipe receiving portion 27 and the semi-cylindrical portion 28B of the clamping member 28. In this state, the flat portion 27A of the pipe receiving portion 27 and the flat portion 28A of the clamping member 28 are fixed in contact with the bolt 29, so that a constant restraint can be obtained regardless of the tightening force of the bolt 29. A case where the fixed pipes 20 and 22 are held with force is described as an example.

  However, the present invention is not limited to this, and may be configured as a clamping force constant clamp member 51 according to the first modification shown in FIG. 18, for example. In this case, the constant restraining force clamping member 51 is constituted by the pipe receiving portion 52, the clamping member 53, and the bolt 54 in substantially the same manner as the first restraining force variable clamping member 35 described above. However, the clamp member 51 with constant binding force according to the modified example is provided with a sleeve 55 between the pipe receiving portion 52 and the holding member 53 around the bolt 54, and the sleeve 55 forms a gap between the pipe receiving portion 52 and the holding member 53. It is good also as a structure which restrains the fixed piping 20 and 22 by fixed restraint force by eliminating.

  Next, FIG. 19 to FIG. 28 show a second embodiment of the present invention. The feature of this embodiment is that the first and second restraining force constant clamping members are formed with an end edge portion and an intermediate edge portion in the semi-cylindrical portion of the pipe receiving portion and the semi-cylindrical portion of the clamping member. There is. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  Reference numeral 61 denotes a first restraining force constant clamping member according to the second embodiment. The first restraining force constant clamp member 61 is configured in substantially the same manner as the first restraining force constant clamp member 25 according to the first embodiment, as shown in FIGS. For this reason, the first restraining force constant clamp member 61 is disposed at substantially the same position as the first restraining force constant clamp member 25 according to the first embodiment, and the strut member 26, the pipe receiving portion 62, It is composed of a clamping member 66 and bolts 29 and clamps the two fixed pipes 22.

  Reference numeral 62 denotes a pipe receiving portion provided in contact with the upper end surface 26 </ b> A of the column member 26. The pipe receiving portion 62 is located at the center in the left and right directions and is provided on both the left and right sides of the flat portion 62A and a rectangular flat portion 62A that contacts the upper end surface 26A of the column member 26. The flat plate 62A is formed with two insertion holes 62C corresponding to the screw holes 26B of the column member 26. Here, since the pipe receiving part 62 is formed by bending a metal plate having elasticity, each semi-cylindrical part 62B has an outer diameter shape and displacement (deformation) of the fixed pipe 22 for bucket cylinder. It can be elastically deformed according to.

  Further, a through hole 63 penetrating in the thickness direction is formed in the semi-cylindrical portion 62B. The through-hole 63 is located in the middle portion of the semi-cylindrical portion 62B in the length direction of the fixed pipe 22, and forms a long hole extending in the left and right directions substantially orthogonal to the length direction of the fixed pipe 22. Yes.

  In the semi-cylindrical portion 62B, two end side edge portions 64 that are located on both ends in the length direction of the fixed pipe 22 and are in contact with the fixed pipe 22 are formed. In addition to this, two intermediate side edge portions 65 are formed in the semi-cylindrical portion 62 </ b> B so as to be located at the intermediate portion in the length direction of the fixed pipe 22 and to come into contact with the fixed pipe 22. The intermediate edge portion 65 is located in the opening portion 63 </ b> A on the inner peripheral side of the through hole 63. As a result, the semi-cylindrical portion 62B has two end-side edge portions 64 with respect to the length direction of the fixed pipe 22 and two end-side edge portions 64 positioned between the two end-side edge portions 64. An intermediate edge portion 65 is formed. These edge portions 64 and 65 have a higher contact pressure with respect to the fixed pipe 22 than the other portions of the semi-cylindrical portion 62B.

  Reference numeral 66 denotes a clamping member provided so as to face the pipe receiving part 62 on the boom 12 side. The clamping member 66 clamps the fixed pipe 22 with the pipe receiving part 62. The clamping member 66 includes a rectangular flat portion 66A, a curved plate-like semi-cylindrical portion 66B provided on both the left and right sides of the flat portion 66A, and substantially the same as the pipe receiving portion 62. It is constituted by two insertion holes 66C provided in the flat portion 66A. Further, like the pipe receiving portion 62, the clamping member 66 is formed of an elastic metal plate. In this case, the pipe receiving part 62 and the clamping member 66 can be reversed and used so as to face each other.

  When the flat portion 62A of the pipe receiving portion 62 and the flat portion 66A of the clamping member 66 are in contact with each other, the opposed semi-cylindrical portions 62B and 66B form a cylindrical shape. For example, the inner diameter of the cylindrical portion is set to be equal to or slightly smaller than the outer diameter of the fixed pipe 22 so that the bucket cylinder fixed pipe 22 does not rattle.

  Further, a through hole 67 penetrating in the thickness direction is formed in the semi-cylindrical portion 66B. The through hole 67 is located in the middle portion of the semi-cylindrical portion 66B in the length direction of the fixed pipe 22, and forms a long hole extending in the left and right directions substantially orthogonal to the length direction of the fixed pipe 22. Yes.

  The semi-cylindrical portion 66 </ b> B is formed with two end-side edge portions 68 that are located on both ends in the length direction of the fixed pipe 22 and come into contact with the fixed pipe 22. In addition, two intermediate edge portions 69 are formed in the semi-cylindrical portion 66 </ b> B so as to be positioned at the intermediate portion in the length direction of the fixed pipe 22 and to come into contact with the fixed pipe 22. The intermediate edge portion 69 is located in the opening portion 67 </ b> A on the inner peripheral side of the through hole 67. As a result, the semi-cylindrical portion 66B has two end-side edge portions 68 in the length direction of the fixed pipe 22 and two end-side edge portions 68 positioned between the two end-side edge portions 68. An intermediate edge portion 69 is formed. These edge portions 68 and 69 have a higher contact pressure with respect to the fixed pipe 22 than the other portions of the semi-cylindrical portion 66B.

  The bolt 29 is inserted into the insertion hole 62 </ b> C of the pipe receiving portion 62 and the insertion hole 66 </ b> C of the holding member 66, and the bolt 29 is screwed into the screw hole 26 </ b> B of the support member 26. Thereby, the pipe receiving part 62 and the clamping member 66 are being fixed to the support | pillar member 26 in the state which pinched | interposed the bucket cylinder fixed piping 22. FIG.

  Here, the first clamping member 61 with a constant binding force is in a state where the flat portion 62A of the pipe receiving portion 62 and the flat portion 66A of the clamping member 66 are in contact, that is, there is no gap between the flat portions 62A and 66A. It is fixed with a bolt 29. Thereby, the first restraining force constant clamp member 61 can hold the bucket cylinder fixed pipe 22 with a constant restraining force regardless of the tightening force of the bolt 29.

  Reference numeral 70 denotes a second restraining force constant clamping member according to the second embodiment. As shown in FIG. 24 to FIG. 28, the second restraining force constant clamp member 70 is configured in substantially the same manner as the second restraining force constant clamp member 30 according to the first embodiment. For this reason, the second restraining force constant clamp member 70 is disposed at substantially the same position as the second restraining force constant clamp member 30 according to the first embodiment, and the support plate 31, the pipe receiving portion 71, It is composed of a clamping member 75 and a bolt 34 and clamps one fixed pipe 22.

  Reference numeral 71 denotes a pipe receiving portion provided in contact with the upper position of the support plate 31. The pipe receiving portion 71 includes a rectangular flat portion 71A that contacts the outer surface of the support plate 31, and a curved plate-like semi-cylindrical portion 71B provided on the upper side of the flat portion 71A. In the flat portion 71A, two insertion holes 71C are formed corresponding to the screw holes 31A of the support plate 31. Further, the pipe receiving part 71 is formed by bending a metal plate having elasticity, and each semi-cylindrical part 71B is elastic according to the outer diameter shape and displacement (deformation) of the bucket cylinder fixed pipe 22. It can be deformed.

  Further, a through hole 72 penetrating in the thickness direction is formed in the semi-cylindrical portion 71B. The through hole 72 is located in the middle portion of the semi-cylindrical portion 71B in the length direction of the fixed pipe 22, and forms a long hole extending substantially downward and perpendicular to the length direction of the fixed pipe 22. Yes.

  The semi-cylindrical portion 71B is formed with two end-side edge portions 73 that are located on both ends in the length direction of the fixed pipe 22 and come into contact with the fixed pipe 22, respectively. In addition to this, two semi-cylindrical edge portions 74 are formed in the semi-cylindrical portion 71 </ b> B, which are located in the intermediate portion in the length direction of the fixed pipe 22 and respectively contact the fixed pipe 22. The intermediate edge portion 74 is located in the opening portion 72 </ b> A on the inner peripheral side of the through hole 72. As a result, the semi-cylindrical portion 71B has two end side edge portions 73 with respect to the length direction of the fixed pipe 22 and two end side edge portions 73 positioned between the two end side edge portions 73. An intermediate edge portion 74 is formed. These edge portions 73 and 74 have a higher contact pressure with respect to the fixed pipe 22 than the other portions of the semi-cylindrical portion 71B.

  75 is a clamping member provided to face the pipe receiving part 71 on the boom 12 side, and the clamping member 75 clamps the fixed pipe 22 between the pipe receiving part 71. Further, the clamping member 75 includes a rectangular flat portion 75A, a curved plate-like semi-cylindrical portion 75B provided on the upper side of the flat portion 75A, and the flat portion in substantially the same manner as the pipe receiving portion 71. It is constituted by two insertion holes 75C provided in 75A. Further, like the pipe receiving portion 71, the clamping member 75 is formed of an elastic metal plate. In this case, the pipe receiving part 71 and the clamping member 75 can be reversed and used so as to face each other.

  In a state where the flat portion 71A of the pipe receiving portion 71 and the flat portion 75A of the clamping member 75 are in contact with each other, the opposing semi-cylindrical portions 71B and 75B form a cylindrical shape. For example, the inner diameter of the cylindrical portion is set to be equal to or slightly smaller than the outer diameter of the fixed pipe 22 so that the bucket cylinder fixed pipe 22 does not rattle.

  The semi-cylindrical portion 75B is formed with a through hole 76 penetrating in the thickness direction. The through-hole 76 is located in the middle portion of the semi-cylindrical portion 75B in the length direction of the fixed pipe 22, and forms a long hole that is substantially perpendicular to the length direction of the fixed pipe 22 and extends downward. Yes.

  The semi-cylindrical portion 75B is formed with two end-side edge portions 77 that are located at both ends in the length direction of the fixed pipe 22 and contact the fixed pipe 22 respectively. In addition to this, two semi-cylindrical edge portions 78 are formed in the semi-cylindrical portion 75 </ b> B so as to be positioned at the intermediate portion in the length direction of the fixed pipe 22 and to come into contact with the fixed pipe 22. The intermediate edge portion 78 is located in the opening portion 76 </ b> A on the inner peripheral side of the through hole 76. As a result, the semi-cylindrical portion 75B has two end-side edge portions 77 with respect to the length direction of the fixed pipe 22 and two end-side edge portions 77 located between the two end-side edge portions 77. An intermediate edge portion 78 is formed. These edge portions 77 and 78 have a higher contact pressure with respect to the fixed pipe 22 than the other portions of the semi-cylindrical portion 75B.

  The bolt 34 is inserted into the insertion hole 71 </ b> C of the pipe receiving portion 71 and the insertion hole 75 </ b> C of the holding member 75, and the bolt 34 is screwed into the screw hole 31 </ b> A of the support plate 31. Thereby, the pipe receiving part 71 and the clamping member 75 are being fixed to the support plate 31 in the state which pinched | interposed the bucket cylinder fixed piping 22. As shown in FIG.

  Here, the second restraining force constant clamp member 70 abuts the flat portion 71A of the pipe receiving portion 71 and the flat portion 75A of the clamping member 75 in substantially the same manner as the first restraining force constant clamp member 61 described above. In this state (the state where there is no gap between the flat portions 71A and 75A), the bolt 34 is used for fixing. Accordingly, the second clamping force constant clamping member 70 can hold the bucket cylinder fixed pipe 22 with a constant restraining force regardless of the tightening force of the bolt 34.

  Thus, also in the second embodiment configured as described above, it is possible to obtain substantially the same operational effects as those of the first embodiment described above. In particular, in the second embodiment, through-holes 63, 67, penetrating in the thickness direction are formed in the semi-cylindrical portions 62B, 71B of the pipe receiving portions 62, 71 and the semi-cylindrical portions 66B, 75B of the clamping members 66, 75, respectively. 72, 76 are provided, so that the opening portions 63A, 67A, 72A, 76A of the through holes 63, 67, 72, 76 are located at intermediate portions in the length direction of the fixed pipe 22, and the intermediate edge portions 65, 69, 74, 78 can be formed. For this reason, the semi-cylindrical portions 62B and 71B of the pipe receiving portions 62 and 71 and the semi-cylindrical portions 66B and 75B of the clamping members 66 and 75 are end-side edge portions located on both ends in the length direction of the fixed pipe 22. 64, 68, 73, 77 and intermediate side edge portions 65, 69, 74, 78 located in the intermediate portion in the length direction of the fixed pipe 22 can be formed.

  In this case, the end side edge portions 64, 68, 73, 77 and the intermediate side edge portions 65, 69, 74, 78 have a high contact pressure with respect to the fixed pipe 22. A large resistance can be exhibited. For this reason, in addition to the edge part side edge parts 64, 68, 73, 77, it can suppress that the fixed piping 22 moves to the length direction by the intermediate | middle side edge parts 65, 69, 74, 78. As a result, since the effect of suppressing the displacement of the fixed pipe 22 by the clamping force constant clamping members 61 and 70 can be enhanced as compared with the case of only the edge portions 64, 68, 73, and 77, the clamping force constant clamping The number of members 61 and 70 can be reduced, and the manufacturing cost can be reduced.

  Next, FIG. 29 to FIG. 31 show a third embodiment of the present invention. The feature of the present embodiment is that the second clamping member with a constant binding force is located on the contact surface side in contact with the fixed pipe on the semi-cylindrical part of the pipe receiving part and the semi-cylindrical part of the clamping member, and the surface roughness is The contact surface portion having a desired value is formed. Note that in the third embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  Reference numeral 91 denotes a second restraining force constant clamping member according to the third embodiment. The second restraining force constant clamp member 91 is configured in substantially the same manner as the second restraining force constant clamp member 70 according to the second embodiment. For this reason, the second restraining force constant clamp member 91 is substantially the same as the second restraining force constant clamp member 70 according to the second embodiment, and the support plate 31, the pipe receiving portion 92, the clamping member 96, and the bolt 34. It is constituted by and sandwiches one fixed pipe 22.

  The pipe receiving part 92 is formed in the same manner as the pipe receiving part 71 according to the second embodiment, and includes a flat part 92A and a semi-cylindrical part 92B. The flat portion 92A is formed with an insertion hole 92C through which the bolt 34 is inserted, and the semi-cylindrical portion 92B is formed with a through hole 93 penetrating in the thickness direction. Further, two end-side edge portions 94 are formed in the semi-cylindrical portion 92 </ b> B so as to be located at both ends in the length direction of the fixed pipe 22 and come into contact with the fixed pipe 22, respectively. Two intermediate side edge portions 95 are formed, which are located in the intermediate portion in the vertical direction and respectively contact the fixed pipe 22. The intermediate edge portion 95 is located in the opening portion 93 </ b> A on the inner peripheral side of the through hole 93.

  The clamping member 96 is also formed in substantially the same manner as the pipe receiving portion 92, is configured by a flat portion 96A and a semi-cylindrical portion 96B, and is formed with an insertion hole 96C and a through hole 97. The semi-cylindrical portion 96 </ b> B is formed with two end-side edge portions 98 that are located on both ends in the length direction of the fixed pipe 22 and contact the fixed pipe 22, respectively. Two intermediate side edge portions 99 are formed, which are located in the intermediate portion in the vertical direction and are respectively in contact with the fixed pipe 22. The intermediate edge portion 99 is located in the opening portion 97 </ b> A on the inner peripheral side of the through hole 97.

  Furthermore, contact surface portions 100 are formed on the semi-cylindrical portions 92B and 96B, respectively, located on the contact surface side in contact with the fixed pipe 22. The contact surface portion 100 has a surface roughness with an arithmetic average roughness Ra of, for example, 3.5 to 10.0. The contact surface portion 100 is formed, for example, by performing shot blasting or the like on the inner peripheral surface side of the semi-cylindrical portions 92B and 96B.

  Thus, also in the third embodiment configured as described above, it is possible to obtain substantially the same operational effects as those of the first and second embodiments described above. In particular, in the third embodiment, the contact surface portion 100 is formed on the semi-cylindrical portion 92B of the pipe receiving portion 92 and the semi-cylindrical portion 96B of the holding member 96 so as to be located on the contact surface side that contacts the fixed piping 22. . For this reason, since the contact resistance between the semi-cylindrical portions 92B and 96B and the fixed pipe 22 can be increased by the contact surface portion 100, the positional displacement suppression effect of the fixed pipe 22 by the second restraining force constant clamp member 91 can be increased. Can be increased.

  Next, FIG. 32 to FIG. 34 show a fourth embodiment of the present invention. A feature of the present embodiment is that the second clamping member with a constant restraining force is provided on the semi-cylindrical part of the pipe receiving part and the semi-cylindrical part of the holding member, on the contact surface side in contact with the fixed pipe, and with a non-slip material. It has been applied. Note that in the fourth embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  Reference numeral 101 denotes a second restraining force constant clamping member according to the fourth embodiment. This second restraining force constant clamp member 101 is configured in substantially the same manner as the second restraining force constant clamp member 70 according to the second embodiment. For this reason, the second restraining force constant clamp member 101 is substantially the same as the second restraining force constant clamp member 70 according to the second embodiment, and the support plate 31, the pipe receiving portion 102, the clamping member 106, and the bolt 34. It is constituted by and sandwiches one fixed pipe 22.

  The pipe receiving part 102 is formed in the same manner as the pipe receiving part 71 according to the second embodiment, and includes a flat part 102A and a semi-cylindrical part 102B. The flat portion 102A is formed with an insertion hole 102C through which the bolt 34 is inserted, and the semi-cylindrical portion 102B is formed with a through hole 103 penetrating in the thickness direction. Further, two end side edge portions 104 are formed in the semi-cylindrical portion 102 </ b> B so as to be positioned at both ends in the length direction of the fixed pipe 22 and come into contact with the fixed pipe 22. Two intermediate side edge portions 105 are formed, which are located in the intermediate portion in the vertical direction and are respectively in contact with the fixed pipe 22. The intermediate edge portion 105 is located in the opening portion 103 </ b> A on the inner peripheral side of the through hole 103.

  The sandwiching member 106 is also formed in substantially the same manner as the pipe receiving portion 102, is configured by a flat portion 106A and a semi-cylindrical portion 106B, and is formed with an insertion hole 106C and a through hole 107. The semi-cylindrical portion 106B is formed with two end-side edge portions 108 that are located at both ends in the length direction of the fixed pipe 22 and are in contact with the fixed pipe 22, respectively. Two intermediate side edge portions 109 are formed, which are located in the intermediate portion in the vertical direction and are respectively in contact with the fixed pipe 22. The intermediate edge portion 109 is located in the opening portion 107 </ b> A on the inner peripheral side of the through hole 107.

  Further, the semi-cylindrical portions 102B and 106B are coated with a non-slip material 110 that is located on the contact surface side in contact with the fixed pipe 22 and prevents the fixed pipe from slipping. The anti-slip material 110 only needs to increase the coefficient of friction between the semi-cylindrical portions 102B and 106B and the fixed pipe 22, for example, a coating having an epoxy resin as a main component and a coefficient of friction of 0.8 or more. Agent is used.

  Thus, also in the fourth embodiment configured as described above, it is possible to obtain substantially the same operational effects as those of the first and second embodiments described above. In particular, in the fourth embodiment, the anti-slip material 110 is applied to the semi-cylindrical portion 102B of the pipe receiving portion 102 and the semi-cylindrical portion 106B of the clamping member 106, located on the contact surface side in contact with the fixed piping 22. . For this reason, since the contact resistance between the semi-cylindrical portions 102B and 106B and the fixed pipe 22 can be increased by the anti-slip material 110, the effect of suppressing the displacement of the fixed pipe 22 by the second restraining force constant clamp member 101 is achieved. Can be increased.

  Further, for example, vibration is generated in the fixed pipe 22 with the supply of pressure oil from the hydraulic pump and the driving of the working device 11. Even in this case, the vibration of the fixed pipe 22 can be absorbed by the anti-slip material 110 made of the resin coating agent, and the vibration suppressing effect of the fixed pipe 22 can be obtained. As a result, by reducing the vibration of the fixed pipe 22, it is possible to prevent generation of sound due to vibration and loosening of the bolt 34.

  In the third and fourth embodiments, the case where the second restraining force constant clamping members 91 and 101 are applied has been described as an example. However, the third restraining force constant clamp members 91 and 101 are applied. Also good.

  In the second to fourth embodiments, the semi-cylindrical portions 62B, 71B, 92B, 102B of the pipe receiving portions 62, 71, 92, 102 and the semi-cylindrical portions 66B of the clamping members 66, 75, 96, 106 are used. , 75B, 96B, 106B have a structure in which one through hole 63, 67, 72, 76, 93, 97, 103, 107 is formed. However, the present invention is not limited to this, and two through holes 113 and 117 are provided in the pipe receiving portion 112 and the holding member 116, respectively, as in the clamp member 111 having a constant binding force according to the second modification shown in FIG. It may be formed. In this case, the pipe receiving part 112 and the clamping member 116 are composed of flat parts 112A and 116A and semi-cylindrical parts 112B and 116B, and the semi-cylindrical parts 112B and 116B are located at both ends in the length direction of the fixed pipe 22. The two end side edge portions 114 and 118 are formed, and the four intermediate side edge portions 115 and 119 are disposed around the through holes 113 and 117 at the intermediate portion in the length direction of the fixed pipe 22. Is formed. Since the intermediate edge portions 115 and 119 are formed in the opening portions 113A and 117A of the through holes 113 and 117, the intermediate edge portions 115 and 119 increase according to the number of the through holes 113 and 117. For this reason, the number of the intermediate side edge portions 115 and 119 can be increased, and the effect of suppressing the displacement of the fixed pipe 22 can be enhanced.

  In the second to fourth embodiments, the semi-cylindrical portions 62B, 71B, 92B, 102B of the pipe receiving portions 62, 71, 92, 102 and the semi-cylindrical portions 66B of the clamping members 66, 75, 96, 106 are used. , 75B, 96B, 106B have through holes 63, 67, 72, 76, 93, 97, 103, 107 formed therein. However, the present invention is not limited to this. For example, like the clamp member 121 with constant binding force according to the third modification shown in FIG. 36, the pipe receiving portion 122 and the clamping member 126 are orthogonal to the length direction of the fixed pipe 22. Notches 123 and 127 extending in the direction may be formed. In this case, the pipe receiving part 122 and the clamping member 126 are composed of flat parts 122A and 126A and semi-cylindrical parts 122B and 126B, and the semi-cylindrical parts 122B and 126B are located at both ends of the fixed pipe 22 in the length direction. The two end side edge portions 124 and 128 are formed, and the two intermediate side edge portions 125 and 129 are located around the notches 123 and 127 at the intermediate portion in the length direction of the fixed pipe 22. Is formed.

  In the second to fourth embodiments, the intermediate edge portions 65, 69, 74, 78, 95 are provided on both the pipe receiving portions 62, 71, 92, 102 and the clamping members 66, 75, 96, 106. , 99, 105, and 109 are described as examples. However, the intermediate edge portion may be provided only in the pipe receiving portion, or the intermediate edge portion may be provided only in the clamping member. Further, the intermediate edge portions 65, 74, 95, 105 of the pipe receiving portions 62, 71, 92, 102 and the intermediate edge portions 69, 78, 99, 109 of the clamping members 66, 75, 96, 106 are not necessarily the same. The number need not be a number, and may be different from each other.

  In the second to fourth embodiments, the intermediate edge portions 65, 69, 74, 78, 95, 99, using the through holes 63, 67, 72, 76, 93, 97, 103, 107 are used. 105 and 109 are formed. However, the present invention is not limited to this. For example, like the clamp member 131 having a constant binding force according to the fourth modification shown in FIGS. 37 and 38, the pipe receiving portion 132 and the holding member 136 are open on the inner peripheral side. It is good also as a structure which provides the bottomed groove part 133,137 by which the outer peripheral side was obstruct | occluded. In this case, the pipe receiving part 132 and the clamping member 136 are composed of flat parts 132A and 136A and semi-cylindrical parts 132B and 136B, and the semi-cylindrical parts 132B and 136B are located at both ends in the length direction of the fixed pipe 22. The two end edge portions 134 and 138 are formed, and the two intermediate edge portions 135 and 139 are formed around the groove portions 133 and 137 at the intermediate portion in the length direction of the fixed pipe 22. It is formed.

  In each of the above embodiments, the arm cylinder fixed pipe 20 and the bucket cylinder fixed pipe 22 are given as examples of the fixed pipe, and the clamp members 25, 30, 35, 39, 61, 70, 91, 101 are used. The case where it is set as the structure attached to the boom 12 is illustrated. However, the present invention is not limited to this. For example, when another attachment such as a breaker or a grapple is provided instead of the bucket 16, a fixed pipe for supplying and discharging pressure oil to an additional hydraulic cylinder is provided. An additional fixed pipe may be attached to the boom 12 together with the fixed pipes 20 and 22.

  Further, in each of the above embodiments, the crawler type hydraulic excavator 1 is described as an example of the construction machine. However, the present invention is not limited to this, and can also be applied to other construction machines provided with a working device on an upper rotating body such as a wheel-type hydraulic excavator.

1 Excavator (construction machine)
2 Lower traveling body (car body)
3 Upper swing body (car body)
4 Rotating Frame 11 Working Device 12 Boom 12E, 14A Base End 12G, 14B Tip 14 Arm 16 Bucket (Working Tool)
17 Boom cylinder 18 Arm cylinder 19 Bucket cylinder (work implement cylinder)
20 Arm cylinder fixed pipe 20A, 22A, 22B Connection part 22 Bucket cylinder fixed pipe 23 Frame side flexible hose 24 Bucket cylinder side flexible hose 25, 61 First restraining force constant clamp member 27, 32, 36, 40 , 52, 62, 71, 92, 102, 112, 122, 132 Piping receiving portion 27B, 28B, 32B, 33B, 62B, 66B, 71B, 75B, 92B, 96B, 102B, 106B, 112B, 116B, 122B, 126B , 132B, 136B Semi-cylindrical portion 28, 33, 37, 41, 53, 66, 75, 96, 106, 116, 126, 136 Holding member 29, 34, 38, 42, 54 Bolt 30, 70, 91, 101, 111, 121, 131 Second restraint force constant clamp member 35 First restraint force variable Ramp member 39 Second variable clamping force clamp member 51 Constant clamping force clamp member 55 Sleeve 63, 67, 72, 76, 93, 97, 103, 107, 113, 117 Through-hole 63A, 67A, 72A, 76A, 93A, 97A, 103A, 107A, 113A, 117A Opening portions 64, 68, 73, 77, 94, 98, 104, 108, 114, 118, 124, 128, 134, 138 End side edge portions 65, 69, 74, 78 , 95, 99, 105, 109, 115, 119, 125, 129, 135, 139 Intermediate edge portion 100 Contact surface portion 110 Non-slip material Y, Y ′ Gap size between pipe receiving portion and clamping member

Claims (6)

  1. A boom attached to a vehicle body of a construction machine so as to move up and down, an arm attached to a tip of the boom so as to be rotatable, a work tool attached to the tip of the arm so as to be rotatable, and the vehicle body A boom cylinder provided between the boom and the arm, an arm cylinder provided between the boom and the arm, a work tool cylinder provided between the arm and the work tool, and a length of the boom A non-flexible fixed pipe extending in the direction, a flexible hose connected to the fixed pipe and allowing the boom or arm to operate, and the fixed pipe for attaching the fixed pipe to the boom A plurality of clamp members disposed between the boom and the fixed pipe at intervals in the length direction of the fixed pipe;
    The plurality of clamp members include a pipe receiving part provided on the boom side, and a clamping member provided to face the pipe receiving part in order to hold the fixed pipe between the pipe receiving part, In the working device of the construction machine configured by a bolt that presses and fixes the holding member to the pipe receiving portion side in a state where the fixed pipe is sandwiched,
    The plurality of clamp members are:
    When the bolt is tightened across the fixed pipe, a gap is interposed between the pipe receiving portion and the holding member, thereby making the binding force of the fixed pipe variable according to the tightening force of the bolt. A variable clamping force clamping member capable of
    Clamping force constant clamp that can keep the binding force to the fixed pipe constant by making no gap between the pipe receiving part and the clamping member when the bolt is tightened across the fixed pipe A construction machine working device characterized by comprising two types of combinations with members.
  2. The restraining force constant clamp member is provided in the vicinity of a connection site with the flexible hose of the fixed pipe,
    The work device for a construction machine according to claim 1, wherein the variable clamping force clamping member is configured to be provided at an intermediate portion in a length direction of the boom.
  3. The pipe receiving portion and the clamping member of the clamp member with a constant restraining force each include a curved plate-like semi-cylindrical portion that clamps the fixed pipe,
    In the semi-cylindrical part of the pipe receiving part and / or the semi-cylindrical part of the clamping member, two end side edge parts which are located at both ends in the length direction of the fixed pipe and are respectively in contact with the fixed pipe The construction apparatus according to claim 1, wherein an intermediate edge portion that is located at an intermediate portion of the fixed pipe and is in contact with the fixed pipe is formed.
  4.   The semi-cylindrical portion of the pipe receiving portion and / or the semi-cylindrical portion of the clamping member is provided with a through hole penetrating in the thickness direction, and the intermediate edge portion is formed at an opening portion of the through hole. Item 4. The construction machine working device according to Item 3.
  5.   In the semi-cylindrical part of the pipe receiving part and / or the semi-cylindrical part of the clamping member, the arithmetic average roughness Ra is 3.5 to 10.0 located on the contact surface side in contact with the fixed pipe. The working device for a construction machine according to claim 3 or 4, wherein a contact surface portion having a surface roughness is formed.
  6.   The semi-cylindrical portion of the pipe receiving portion and / or the semi-cylindrical portion of the clamping member is coated with an anti-slip material that is located on the contact surface side that comes into contact with the fixed piping and prevents the fixed piping from slipping. The working device for a construction machine according to claim 3 or 4.
JP2011082015A 2010-08-27 2011-04-01 Construction equipment working equipment Active JP5611881B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013529270A (en) * 2010-05-17 2013-07-18 ボルボ コンストラクション イクイップメント アーベー Hydraulic piping fixing device for construction machinery
JP2014005605A (en) * 2012-06-21 2014-01-16 Hitachi Constr Mach Co Ltd Hydraulic piping fastening structure for construction machine
JP2014037707A (en) * 2012-08-15 2014-02-27 Hitachi Constr Mach Co Ltd Construction machine
DE112012000379B4 (en) * 2012-05-22 2015-07-16 Komatsu Ltd. hydraulic excavators
CN104878797A (en) * 2015-05-15 2015-09-02 广西玉柴重工有限公司 Pressure increasing type automatic locating steel pipe clamp
KR20160059496A (en) * 2014-11-18 2016-05-27 대모 엔지니어링 주식회사 Hose connecting structure for hydraulic breaker
KR20170000956U (en) * 2015-09-04 2017-03-14 현대중공업 주식회사 Rubber Clamp for Hydraulic Pipe in Construction Equipment

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JPH01150282U (en) * 1988-04-08 1989-10-17
JPH08326966A (en) * 1995-05-31 1996-12-10 Koyo Seiko Co Ltd Clamp device
JP2002327453A (en) * 2001-05-07 2002-11-15 Komatsu Ltd Clamping apparatus for hydraulic pipe for working machine of construction equipment
JP2005016304A (en) * 2004-10-15 2005-01-20 Yanmar Co Ltd Hydraulic piping structure of swing type working vehicle
JP2008025186A (en) * 2006-07-20 2008-02-07 Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd Clamp device for hydraulic piping of construction machinery
JP2011149212A (en) * 2010-01-22 2011-08-04 Kobe Steel Ltd Working arm, and working machine equipped with the same

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JPH01150282U (en) * 1988-04-08 1989-10-17
JPH08326966A (en) * 1995-05-31 1996-12-10 Koyo Seiko Co Ltd Clamp device
JP2002327453A (en) * 2001-05-07 2002-11-15 Komatsu Ltd Clamping apparatus for hydraulic pipe for working machine of construction equipment
JP2005016304A (en) * 2004-10-15 2005-01-20 Yanmar Co Ltd Hydraulic piping structure of swing type working vehicle
JP2008025186A (en) * 2006-07-20 2008-02-07 Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd Clamp device for hydraulic piping of construction machinery
JP2011149212A (en) * 2010-01-22 2011-08-04 Kobe Steel Ltd Working arm, and working machine equipped with the same

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013529270A (en) * 2010-05-17 2013-07-18 ボルボ コンストラクション イクイップメント アーベー Hydraulic piping fixing device for construction machinery
DE112012000379B4 (en) * 2012-05-22 2015-07-16 Komatsu Ltd. hydraulic excavators
JP2014005605A (en) * 2012-06-21 2014-01-16 Hitachi Constr Mach Co Ltd Hydraulic piping fastening structure for construction machine
JP2014037707A (en) * 2012-08-15 2014-02-27 Hitachi Constr Mach Co Ltd Construction machine
KR20160059496A (en) * 2014-11-18 2016-05-27 대모 엔지니어링 주식회사 Hose connecting structure for hydraulic breaker
KR101638448B1 (en) 2014-11-18 2016-07-13 대모 엔지니어링 주식회사 Hose connecting structure for hydraulic breaker
CN104878797A (en) * 2015-05-15 2015-09-02 广西玉柴重工有限公司 Pressure increasing type automatic locating steel pipe clamp
KR20170000956U (en) * 2015-09-04 2017-03-14 현대중공업 주식회사 Rubber Clamp for Hydraulic Pipe in Construction Equipment

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