JP2003268804A - Reinforcing device for component of construction machinery and its reinforcing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method for reinforcing the component of construction machinery capable of sufficiently maintaining a reinforcing function. <P>SOLUTION: When a reinforcing plate 34 is installed to the external surfaces 25a1 and 25b1 of the left-right side side plates 25a and 25b of an arm 17 for a hydraulic backhoe 1, the reinforcing plate 34 is joined with the external surfaces 25a1 and 25b1 of the side plates 25a and 25b by the fillet welds 36 of the peripheral end faces 34a of the reinforcing plate 34 and the external surfaces 25a1 and 25b1 of the side plates 25a and 25b and a plurality of strips of deep penetration welds 37 by a laser welding mounted so as to penetrate into the inside of the side plates 25a and 25b from the surface of the reinforcing plate 34. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing device for a structural member of a construction machine, and more particularly to a reinforcing device for a structural member of a construction machine capable of sufficiently maintaining a reinforcing function.

[0002]

2. Description of the Related Art A working machine for a construction machine is provided with a working arm which can be raised and lowered on a revolving structure of a traveling structure and a revolving structure which constitute a main body of the construction machine, and a rotatably mounted end of the working arm. It consists of a digging bucket and. Since the excavation bucket and the working arm are used under severe working conditions, various measures have been proposed for reinforcing them.

As a measure for reinforcement, for example, Japanese Patent Laid-Open No. 200
As disclosed in Japanese Patent Laid-Open No. 1-115481, there is a method of providing a reinforcing member in the box-shaped working arm in order to increase the overall rigidity of the box-shaped working arm.

On the other hand, among the above-mentioned constituent members (working arm, excavation bucket, etc.) constituting the working apparatus, as a particularly local reinforcing measure, for example, as disclosed in JP-A-6-220884, the working arm is disclosed. To provide a reinforcing member on the side surface of the work arm (boom in this example) in order to improve the strength of a partial portion such as the tip portion and the base portion,
As disclosed in JP-A 1-271371, there is a method of providing a reinforcing member and a protective member for reinforcing and protecting the cloud-side surface of a box-shaped working arm (arm in this example).

[0005]

Working devices such as working arms mounted on a construction machine are exposed to various load acting conditions depending on the operating mode and operating environment, and the constituent members that make up the working device. Particularly high stress may occur in a local region of the.

Further, in recent years, work devices have been attempted to be lighter from the viewpoint of improving their operating speed (improving workability) or improving fuel efficiency, and as a result, the above-mentioned components constituting the work device are increasingly being used. There is an urgent need to take measures against high stress acting on local parts.

As a countermeasure therefor, generally, from the attachability of the reinforcing member, the latter of the above-mentioned measures, that is, the method of providing the reinforcing member on the outer surface of the constituent member constituting the working apparatus is often used. There is. This reinforcing measure is to fix a plate-shaped reinforcing member to the outer surface of the constituent member of the working device by welding, but specifically, to position the plate-shaped reinforcing member to the outer surface of the constituent member of the working device. , By fixing the plate-shaped reinforcing member to the outer surface of the constituent member by fillet welding the entire circumference of the corner of the outer surface of the constituent member and the outer peripheral end surface of the plate-shaped reinforcing member, Improves strength.

However, in the above-mentioned measure for fixing the reinforcing member, although the outer surface of the constituent member and the outer peripheral end face of the plate-shaped reinforcing member are joined by the weld bead by fillet welding as described above, No fixing is applied to the contact surface where the outer surface and the plate-shaped reinforcing member contact each other.

Therefore, when the working device is used under a severe load condition, the load stress acts on the plate-shaped reinforcing member through the side surface of the constituent member of the working device and the welding bead, so that the plate-shaped reinforcing member is processed. The reinforcing member of 1 tends to be displaced relative to the surface of the component. As a result, stress concentrates in the vicinity of the reinforcement member and the weld bead (hereinafter referred to as the unwelded end of the reinforcement member), causing cracks in the weld bead, which allows the reinforcement member to maintain its reinforcement function sufficiently. You may not be able to.

Further, since the working device of the construction machine is used under severe load conditions as described above, a bending load also acts on the working device. In this case, the constituent members of the working device undergo out-of-plane deformation, but as described above, since no fixing is applied to the contact surface where the outer surface of the constituent member and the plate-shaped reinforcing member contact each other, it is reinforced. The member cannot follow the out-of-plane deformation of the constituent member of the working device, and a force acting on the reinforcing member in such a direction that it is separated from the constituent member is applied. As a result, stress concentrates on the unwelded end portion of the reinforcing member, causing cracks in the weld bead, and the reinforcing member may peel off from the constituent members, making it impossible to sufficiently maintain the reinforcing function.

The present invention has been made based on the above matters, and it is an object of the present invention to provide a reinforcing device and a reinforcing method for a structural member of a construction machine capable of sufficiently maintaining a reinforcing function.

[0012]

(1) In order to achieve the above object, the present invention provides a reinforcing device for a structural member of a construction machine, wherein the reinforcing member is provided on the outer surface of the structural member. Fixing to the outer surface of the constituent member by fillet welding between the outer peripheral end surface and the outer surface of the constituent member and at least one deep penetration welding that is made to penetrate from the surface to the inside of the constituent member.

When stress is generated in the constituent members of the construction machine due to the load applied to the construction machine, in the conventional structure in which the outer peripheral end surface of the reinforcement member and the outer surface of the constituent member are fillet-welded, Since the contact surface with the constituent member is in a floating state and the joint between the reinforcing member and the constituent member is substantially only the weld bead by fillet welding, stress concentrates on the unwelded end of the reinforcing member. When the high stress state of the unwelded end portion of the reinforcing member repeatedly occurs in this manner, a crack due to fatigue fracture may occur in the weld bead from the unwelded end portion.

Further, when, for example, bending stress is generated in a component member constituting this construction machine due to a load applied to the construction machine and the component member undergoes out-of-plane deformation, the outer peripheral end face of the reinforcing member and the outer surface of the component member are In the conventional structure in which the fillet welding is performed, a force is applied to the reinforcing member in a direction such that the reinforcing member is separated from the constituent members, and thus stress concentrates on the unwelded end portion of the reinforcing member. When the high stress state of the unwelded end portion of the reinforcing member repeatedly occurs in this manner, a crack due to fatigue fracture may occur in the weld bead from the unwelded end portion.

In the present invention, in addition to the fillet welding between the outer peripheral end surface of the reinforcing member and the outer surface of the constituent member, at least one deep penetration welding is performed so as to melt from the surface of the reinforcing member into the constituent member. It is possible to increase the actual joint area between the reinforcing member and the constituent member as compared with the above-mentioned conventional technique. This alleviates the stress concentration at the unwelded end of the reinforcing member, thereby preventing the occurrence of cracks in the welding bead and preventing the reinforcing member from being separated from the constituent members. Therefore, the reinforcing function of the reinforcing member can be sufficiently maintained.

(2) In order to achieve the above object, the present invention is joined to a component of a construction machine for reinforcing a component of at least a part of the construction machine. At least one reinforcing member,
A fillet weld formed by fillet-welding the outer surface of the constituent member and the outer peripheral end surface of the reinforcing member, and a region inside the outer peripheral end surface of the reinforcing member are melted from the surface to the inside of the constituent member. And a deep penetration weld formed by deep penetration welding.

(3) In the above (1) or (2), preferably, the constituent member is a working arm provided on the construction machine so as to be capable of being raised and lowered.

(4) In the above (1) or (2), and preferably, the constituent member is an excavation bucket provided in the construction machine.

(5) In the above (1) or (2), and preferably, the constituent member is a connecting member in the construction machine.

(6) In any one of (1) to (5) above, and preferably, the deep penetration welding is at least one substantially linear welding.

(7) In the above item (6), more preferably, the deep penetration welding is welding using a high-density energy heat source.

As a result, it is possible to perform deep penetration welding accurately in a narrow range. Further, since the heat-affected zone due to welding can be reduced, the welding strain of the reinforcing member and the constituent members can be reduced. Therefore, the reinforcing function of the reinforcing member can be reliably maintained.

(8) In order to achieve the above-mentioned object, the present invention is a reinforcing device for a structural member of a construction machine, wherein the reinforcing member is provided on the outer surface of the structural member. The fillet welding provided at the corner portion with the outer surface of the member, and the at least one deep penetration welding provided so as to melt from the outer surface of the reinforcing member into the inside of the constituent member, the constituent member of the reinforcing member Increase the bonding area to the outer surface.

(9) In order to achieve the above object, the present invention is a reinforcing device for a constituent member of a construction machine, wherein a reinforcing member is provided on an outer surface of the constituent member. Fillet welding to join the outer surface of the reinforcing member and the depth of joining the facing surface of the reinforcing member and the constituent member so as to suppress the floating of the facing surface of the reinforcing member that contacts the outer surface of the constituent member. The reinforcement member is fixed to the outer surface of the component member by the penetration welding.

(10) In order to achieve the above object, the present invention provides a working machine for a construction machine, wherein a reinforcing member is provided on an outer surface of a constituent member of the working machine for the construction machine. A fillet weld between the end face and the outer surface of the component and at least one deep penetration weld that penetrates from the surface into the component secures to the outer surface of the component.

(11) In order to achieve the above-mentioned object, the present invention provides a working arm of a construction machine, wherein the reinforcing member is provided on the outer surface of the working arm constituting the working device of the construction machine. It is fixed to the outer surface of the working arm by fillet welding between the outer peripheral end surface and the outer surface of the working arm and at least one deep penetration welding which is made to penetrate from the surface to the inside of the outer surface of the working arm.

(12) In order to achieve the above object, the present invention provides an excavation bucket for a construction machine, which comprises a reinforcement member on an outer surface of the excavation bucket which constitutes a working device of the construction machine. It is fixed to the outer surface of the excavation bucket by fillet welding between the outer peripheral end surface and the outer surface of the excavation bucket and at least one deep penetration weld that is melted from the surface to the inside of the outer surface of the excavation bucket.

(13) In order to achieve the above-mentioned object, the present invention provides a connecting member for a construction machine, wherein a reinforcing member is provided on the outer surface of the connecting member constituting the working device for the construction machine.
The reinforcing member is joined to the outside of the connecting member by fillet welding between the outer peripheral end surface of the reinforcing member and the outer surface of the connecting member and at least one deep penetration welding that is made to penetrate from the surface to the inside of the outer surface of the connecting member. Fix on the surface.

(14) In order to achieve the above object, the present invention relates to a method of reinforcing a constituent member of a construction machine, wherein a reinforcing member is provided on an outer surface of the constituent member. The reinforcement member of the constituent member is formed by deep-welding at least one portion of the reinforcement member so that the corner portion with the surface is fillet-welded, and then the surface of the reinforcement member is melted into the constituent member. Fix on the outer surface.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a reinforcing device and a reinforcing method for constituent members of a construction machine according to the present invention is shown in FIGS.
Will be described with reference to. 1 (a) and 1 (b),
FIG. 1 is a perspective view showing an entire structure of a hydraulic excavator (mini excavator) including an embodiment of a reinforcing device for a component of a construction machine according to the present invention, and FIG. FIG. 1 (b) is a perspective view of this hydraulic excavator as seen from the front.

In these FIGS. 1 (a) and 1 (b), 1 is a relatively small so-called swing type hydraulic excavator, and 2L and 2R are left and right endless track crawler tracks (crawlers) which are traveling means. ) 3 are these tracked tracks 2
A traveling body provided with L and 2R, 4 is a revolving body mounted on the upper portion of the traveling body 3 so as to be revolvable, 5 is a revolving frame that forms a base lower structure of the revolving body 4, and 6 is a front of the revolving frame 5. A swing post provided on the side, an articulated work device 7 attached to the swing post 6 so as to be vertically rotatable (movable in a vertical motion), and a so-called work device 8 provided on the revolving frame 5. A canopy-type operator's cab, 9 is an upper cover that covers most of the swivel frame 5 except the operator's cab 8.

Further, 10 is a substantially H-shaped track frame, and 11L and 11R are left and right sides of the track frame 10.
Drive wheels rotatably supported near the rear ends on both right and left sides, 12
L and 12R are left and right traveling hydraulic motors that drive the drive wheels 11L and 11R, respectively. 13L, 13R
Is a driven wheel (idler), and these driven wheels 13L, 1
3R is rotatably supported in the vicinity of the front end on both left and right sides of the track frame 10, and is rotated by the driving force of the drive wheels 11L and 11R via the endless track crawler belts 2L and 2R, respectively. Reference numeral 14 denotes a blade for earth removal, and the blade 14 is provided on the front side of the track frame 10 so as to be vertically movable by a blade hydraulic cylinder 15.
The traveling body 3 includes the truck frame 10, drive wheels 11L and 11R, left and right traveling hydraulic motors 12L and 12L.
R, driven wheels 13L and 13R, a blade 14, and a hydraulic cylinder 15 for a blade, and a swivel base bearing (not shown) having a swivel hydraulic motor (not shown) built therein is arranged substantially in the center thereof. Has been done. As a result, the revolving frame 5 can revolve with respect to the traveling body 3.

The swing post 6 connects the working device 7 to the revolving frame 5 rotatably in the horizontal direction around an axial direction of the swing post 6 through a swing pin (not shown) whose axial direction is substantially vertical. ing.

Further, 16 is a boom whose base end is rotatably connected to the swing post 6, and 17 is the boom 1
6 is an arm rotatably connected to the tip of the arm 6, 18 is an excavation bucket rotatably connected to the tip of the arm 17, and the working device 7 is the boom 16, the arm 17, and the excavation bucket. Eighteen. The boom 16, the arm 17, and the excavation bucket 18 are respectively provided with a boom hydraulic cylinder 19 and an arm hydraulic cylinder 2.
It is driven by 0 and the bucket hydraulic cylinder 21.

The driver's cab 8 is provided at a substantially central portion on the revolving frame 5, a seat (driver's seat) 22 on which an operator is seated, and a roof 23 provided above the seat 22. Roof support member 24 that supports the roof 23
It has and.

In the hydraulic excavator 1 having such a configuration, the greatest feature of the present invention is provided in various constituent members constituting the traveling body 3, the revolving structure 4, the working device 7 and the like included in the hydraulic excavator 1. There is a reinforcement device. That is, when reinforcing the reinforcing plate by welding and joining to a portion of the structural members where a relatively large stress is generated by the load during work, a corner formed by the outer peripheral end surface of the reinforcing plate and the outer surface of the structural member. In addition to fillet welding the part,
This is that the region inside the outer peripheral end face of this reinforcing plate is deep-penetration welded by laser welding at least at one place so as to penetrate from the surface to the inside of the component. Among the structures constituting the hydraulic excavator 1, the arm 1 will be described below.
7 and the excavation bucket 18 as an example, the detailed structure of the reinforcing device in the components of the construction machine will be described.

(1) Arm 17 FIG. 2A is a partial perspective view showing a part of the working device 7 shown in FIG. 1A in the vicinity of the arm 17, and FIG. It is a perspective view showing the detailed structure of the arm 17 shown to 2 (a). 2 (a) and 2 (b), 25 is an arm body, and 26 and 26 are a pair of brackets fixed to the arm body 25.
7 is composed of these arm bodies 25 and brackets 26, 26.

The arm body 25 includes left and right side plates 25a and 25b (see FIG.
Only the left side plate 25a is shown in (b), the outer peripheral side plate 25c forming the outer peripheral surface on the dump side, the inner peripheral side plate 25d forming the inner peripheral surface on the cloud side, and the side surface on the boom 16 side. The boom-side side plate 25e that is formed is welded to form a substantially triangular prismatic box-shaped structure.

A substantially cylindrical boom boss 27 into which a pin (not shown) for connecting the boom 16 and the arm 17 is inserted is provided at the end of the arm body 25 on the cloud side on the boom 16 side. ing. By inserting the pin into the boom 16 and the boom boss 27 through the bushes 28 and the seals 29 arranged at both ends of the boom boss 27, the boom 16 and the arm 17 can rotate. It is supposed to be connected. Further, a bucket boss 30 is similarly provided at an end portion of the arm body 25 on the side of the excavation bucket 18, and the arm 17 and the excavation bucket 18 are provided.
The pin 31 (see FIG. 1) for connection with the digging bucket 18
And the bucket boss 30 to the bucket boss 30.
By being inserted through the bushes 32 and the seals 33 arranged at both ends of the arm 17, the arm 17 and the excavation bucket 1
And 8 are rotatably connected.

Here, the left and right side plates 25a, 25b
In the vicinity of the boom boss 27, reinforcing plates 34 having a shape surrounding the boom boss 27 are joined by welding for the purpose of improving the strength of the arm 17. FIG. 3 shows the reinforcing plate 34 and the left and right side plates 25 at this time.
It is sectional drawing showing the detailed structure of the joining part with a and 25b. In FIG. 3, the reinforcing plate 34 is formed with an outer peripheral end surface 34a and outer surfaces 25a1 and 25b1 of the left and right side plates 25a and 25b of the arm.
Is fillet-welded over the entire circumference of the reinforcing plate 34 by, for example, arc welding, whereby the outer surfaces 25a1, 25b1 are formed.
Are joined to each. 36 is a weld bead by fillet welding at this time. Further, the reinforcing plate 34 should be deeply welded in a substantially linear manner by laser welding so that the reinforcing plate 34 is melted from the surface of the reinforcing plate 34 to the inside of the left and right side plates 25a and 25b of the arm in a region inside the outer peripheral end face 34a. And are joined to the outer surfaces 25a1 and 25b1 respectively. Reference numeral 37 is a weld metal portion formed by deep penetration welding at this time (see also FIG. 2B).

In the above, the hydraulic excavator 1 constitutes the construction machine described in the claims, and the arm 17 is
The construction machine is provided with a work arm that can be raised and lowered, and the left and right side plates 25a and 25b of the arm are components that form at least a part of the construction machine. In addition, the reinforcing plate 34
Constitutes at least one reinforcing member joined to the constituent member, and the welding bead 36 constitutes a fillet weld portion formed by fillet welding the outer surface of the constituent member and the outer peripheral end face of the reinforcing member. Then, the weld metal portion 37 constitutes a deep penetration welding portion formed by deep penetration welding in which a region inside the outer peripheral end surface of the reinforcing member is melted from its surface to the inside of the constituent member, and these reinforcing plate 34 and the welding bead are formed. 36
The weld metal portion 37 and the weld metal portion 37 constitute a reinforcing device for the constituent members of the construction machine.

In the vicinity of the boom boss 27 of the arm 17 constructed as described above, a load (or, for example, excavation) substantially equivalent to the weight of the arm 17 and the weight of the excavation bucket 18 and the excavated object during operation of the hydraulic shovel 1. Sometimes, the reaction force of the object to be excavated causes a larger load to be applied, which causes relatively large stress in the left and right side plates 25a and 25b of the arm. At this time, as in the conventional structure described above, when only the fillet portion 35 of the reinforcing plate 34 is fillet welded over the entire circumference, the actual joining portion is only the weld bead 36 of fillet welding. 34
Stress concentrates on a portion (hereinafter, referred to as an unwelded end portion of the reinforcing plate 34) 38 adjacent to the weld bead 36. When the high stress state of the unwelded end portion 38 of the reinforcing plate 34 is repeatedly generated in this manner, a crack due to fatigue fracture may occur in the weld bead 36 from the unwelded end portion 38.

Further, for example, when the revolving unit 4 rapidly rotates with the excavation bucket 18 loaded with excavated objects, bending stress is generated in the left and right side plates 25a, 25b of the arms, and the left and right side plates 25a, 25a. When 25b undergoes out-of-plane deformation,
A force is exerted on the reinforcing plate 34 in a direction such that it is separated from the left and right side plates 25a, 25b of the arm. At this time, in the above structure, stress concentrates on the unwelded end portion 38 of the reinforcing plate 34, which may cause cracks in the weld bead 36 due to fatigue fracture from the unwelded end portion 38.

On the other hand, in the present embodiment, in addition to the fillet welding of the above-mentioned corner portion 35, the region inside the outer peripheral end face 34a of the reinforcing plate 34 is melted from the surface to the inside of the arm left / right side plates 25a, 25b. As described above, since the reinforcing plate 34 is joined to the left and right side plates 25a and 25b by laser welding, for example, in a plurality of linear deep-welding welds, the plurality of the weld metal portions 37 by the deep-welding welding can be used. Reinforcing plate 34 and left compared to technology
The actual joining area with the right side plates 25a and 25b can be increased. As a result, stress concentration on the unwelded end portion 38 of the reinforcing plate 34 can be relaxed. Further, due to the plurality of weld metal portions 37 formed by the deep penetration welding, it is possible to alleviate the stress concentration at the unwelded end portion 38 of the reinforcing plate 34 against the force of the peeling direction applied to the reinforcing plate 34. . These prevent cracks from being generated from the unwelded end portion 38 into the weld bead 36, and the left and right side plates 25 of the reinforcing plate 34 can be prevented.
It is possible to prevent peeling from a and 25b. Therefore, the reinforcing function of the reinforcing plate 34 can be sufficiently maintained. As a result, the strength reliability of the arm 17 can be improved.

According to the above reinforcing method, the reinforcing plate 34
Since the fixing work by fillet welding and deep penetration welding can be performed from the outside of the arm 17, there is also an effect that good workability in the fixing work of the reinforcing plate 34 can be maintained.

(2) Excavation Bucket 18 FIG. 4 (a) is a partial perspective view showing a portion of the working device 7 shown in FIG. 1 (a) in the vicinity of the excavation bucket 18, and FIG. 4 (b). Is the excavation bucket 18 shown in FIG.
It is a perspective view showing the detailed structure of. In FIGS. 4A and 4B, 39 is a bucket body, 40, 40.
Is a pair of brackets fixed to the upper portion of the bucket body 39, and the excavation bucket 18 is composed of the bucket body 39 and the brackets 40, 40.

Further, 41 is a top plate, 42 is a bottom plate bent in a substantially U shape, 43 and 43 are side plates provided at both ends of the top plate 41 and the bottom plate 42, and the bucket body 39 is
The top plate 41, the bottom plate 42, and the side plates 43, 43 are provided to form a substantially box-shaped structure having an opening 44 on the cloud side.

Further, 45 is the opening 44 of the bottom plate 42.
A plurality of (four in this embodiment) claws are provided at the side tip portions, and 46, 46 are side cutters respectively provided at the lower ends of the side plates 43, 43 on the side of the opening 44. The claw portion 45 and the side cutter 46 enable the excavation bucket 18 to efficiently excavate excavated material such as earth and sand into the bucket body 39 during cloud operation.

Each of the brackets 40, 40 is provided with a through hole 47 for inserting the pin 31 (see FIG. 1) for connecting the arm 17 and the excavation bucket 18 on the cloud side, and on the dump side. Bucket hydraulic cylinder 21
Bucket link 48 (FIG. 1 or 4) connected to the tip of
(See (a)) and a pin 49 for connecting the excavation bucket 18
(See FIG. 1) Through holes 50 for insertion are provided respectively.

In addition, substantially donut-shaped outer boss plates 51 are fixed by welding at positions corresponding to the through holes 47 and 50 on the outer surface 40a of the bracket 40 located outward in the width direction of the excavation bucket 18. Has been done. At this time, a plurality of (three in the present embodiment) fixing bolts 52
Is a fixing plate 53, a plurality of (three in the present embodiment) shims 5 from the outside to the inside of the bracket 40.
4, the outer boss plate 51 and the bracket 40, and the plurality of (two in the present embodiment) shims 54 are penetrated and fastened to the screw holes 56 of the inner boss plate 55, whereby the inner boss plate 55 is fixed to the bracket 40. (However, the fixing bolt 52 is not involved in fixing the outer boss plate 51 to the bracket 40).

In this way, with the inner boss plate 55 fixed to the bracket 40, the pin 31 for connecting the arm 17 and the excavation bucket 18 described above is connected to the arm 17
The fixing plate 53, the three shims 54, the outer boss plate 51 and the bracket 40, the two shims 54, the inner boss plate 55, and the arms, which are arranged at both ends of the (precisely, the boss 30 for the bucket). The arm 17 and the excavation bucket 18 are rotatably connected to each other by being inserted into 17 (more precisely, the bucket boss 30 described above). Similarly, the pin 53 for connecting the bucket link 48 and the excavation bucket 18 is arranged at both ends of the bucket link 48, and the fixed plate 53 and the three shims 5 are provided.
4, outer boss plate 51 and bracket 40, two shims 5
4, the inner boss plate 55 and the bucket link 48 are inserted into the bucket link 48 and the excavation bucket 1
And 8 are rotatably connected.

The outer boss plate 51 has a circumferential outer peripheral end face 51a and the outer surface 40a of the bracket 40 which are fillet-welded by, for example, arc welding over the entire circumference of the outer boss plate 51. , This outer boss plate 51
The regions inside the outer peripheral end face 51a are welded to the inside of the bracket 40 from the surface thereof by laser welding, for example, in a plurality of substantially deep concentric deep welds, and are respectively joined to the bracket outer surface 40a. At this time, 57 is a weld metal portion formed by this deep penetration welding.

On the other hand, outer surfaces 41a, 42 of the top plate 41 and the bottom plate 42 located outside the bucket body 39.
A plurality of double bottom plates 58 are attached to a for the purpose of improving the strength and wear resistance of the excavation bucket 18. Figure 5
FIG. 5 is a side sectional view taken along the line VV in FIG. 6 is a top view of the excavation bucket 18 seen from the direction A in FIG. 5, and FIG. 7 is a bottom view of the excavation bucket 18 seen from the direction B in FIG.

In FIGS. 5 to 7, reference numeral 58a designates a relatively long plate attached on the bottom plate outer surface 42a so as to reach the top plate 41 from the vicinity of the claw portion 45 of the bottom plate 42.
Reference numeral 58b is a relatively short short plate attached on the outer surface 42a of the bottom plate, and the double bottom plate 58 is composed of these long plates 58a and short plates 58b. These long plates 58
The a and the short plate 58b are slender and substantially rectangular plates curved along the bottom plate 42, and are located at plural positions in the width direction of the excavation bucket 18 from the vicinity of the claw portion 45 toward the top plate 41 along the bottom plate outer surface 42a. Are attached in parallel to each other. Of these long plates 58a and short plates 58b, short plates 58b are arranged at both ends in the width direction of the excavation bucket 18, and long plates 58a are arranged on the inside other than both ends thereof. As described above, the long plate 58a is attached so as to straddle the bottom plate 42 and the top plate 41.

The long plate 58a has an outer peripheral end surface 58a1.
And the outer surfaces 41a, 42a of the top plate 41 or the bottom plate 42 are fillet-welded over the entire circumference of the long plate 58a by, for example, arc welding, and further, inside the outer peripheral end surface 58a1 of the long plate 58a. The outer surface 41a is formed by laser welding such that a region is melted from its surface into the top plate 41 or the bottom plate 42, for example, in a longitudinal direction (or may be a short direction) in a substantially linear manner by deep welding. Four
It is joined to 2a. Similarly to the long plate 58a, the outer peripheral end surface 58b1 of the short plate 58b is fillet welded over the entire circumference, and the inner region is deep penetration welded to be joined to the outer surface 42a of the bottom plate 42. There is. At this time, 59 is a weld metal portion formed by deep penetration welding.

The above-mentioned outer boss plate 51 and double bottom plate 58 have a welded structure for deep penetration welding by laser welding, and the reinforcing plate 34 shown in FIG. 3 described in (1) above.
It is similar to the welded structure of.

In the above, the bracket 40 and the top plate 4
1 and the bottom plate 42 form a component that constitutes at least a part of the construction machine recited in the claims, and the bracket 40 also forms a connection member in the construction machine. The outer boss plate 51 and the double bottom plate 58 are
At least one reinforcing member that is joined to the constituent member is configured, and the weld metal portions 57 and 59 are formed by deep penetration welding in which a region inside the outer peripheral end surface of the reinforcing member is melted from the surface to the inside of the constituent member. The deep-penetration welded portion is formed, and the outer boss plate 51, the double bottom plate 58, and the weld metal portions 57 and 59 form a reinforcing device for the components of the construction machine.

By constructing the excavation bucket 18 in this way, like the arm 17 in the above (1),
The stress concentration of the weld bead in the fillet welding in the outer boss plate 51 and the double bottom plate 58 can be relaxed. Therefore, the reinforcing function of the outer boss plate 51 and the double bottom plate 58 can be sufficiently maintained. As a result of this,
The strength reliability and wear resistance of the excavation bucket 18 can be improved.

Further, according to the above reinforcing method, similarly to the arm 17 in the above (1), the fixing work of the outer boss plate 51 and the double bottom plate 58 by fillet welding and deep penetration welding is performed outside the excavation bucket 18. Since it can be performed from one side, there is also an effect that good workability in the fixing work of the outer boss plate 51 and the double bottom plate 58 can be maintained.

Although the excavation bucket used in a relatively small hydraulic excavator has been described above,
In an excavation bucket used for a relatively large hydraulic excavator, a double side plate may be provided in addition to the double bottom plate. In such a case, the double side plates may have a welded structure as described above. FIG. 8 is a perspective view showing a detailed structure of an excavation bucket used for a relatively large hydraulic excavator.

In FIG. 8, 18 'is an excavation bucket used for a relatively large hydraulic excavator as described above, 41' is a top plate, 42 'is a bottom plate, and 43', 43 '.
Is a side plate and 58 'is a plurality of double bottom plates consisting of a long plate 58'a and a short plate 58'b. Double side plates 60, 60 are attached to the lower portions of the side plates 43 ', 43'. In these double side plates 60, the outer peripheral end surface 60a is the double side plate 60.
In addition to being fillet welded over the entire circumference of the side plate 4, the inner region of the side plate 4 is deep-penetration welded by laser welding.
It is joined to the outer surface 43'a of 3 ', respectively. Reference numeral 61 is a weld metal portion formed by the deep penetration welding.

In the above, the side plate 43 'constitutes a constituent member which constitutes at least a part of the construction machine described in each claim. Further, the double side plate 60 constitutes at least one reinforcing member that is joined to the constituent member, and the weld metal portion 61 has a depth in which a region inside the outer peripheral end surface of the reinforcing member is melted from the surface to the inside of the constituent member. A deep penetration weld portion formed by penetration welding is configured, and the double side plate 60 and the weld metal portion 61 configure a reinforcing device for a component member of the construction machine.

With such a structure, the reinforcing function of the double side plate 60 can be sufficiently maintained as in the above-described excavation bucket 18. As a result, the strength reliability and wear resistance of the excavation bucket 18 'can be improved.

Next, another embodiment of the reinforcing device and the reinforcing method for the constituent members of the construction machine of the present invention will be described with reference to FIGS.
This will be described below with reference to FIG. In the present embodiment, the present invention is applied to an offset type hydraulic excavator work device and a swing frame (more precisely, a swing body support member described later). FIG. 9 (a) is a side view showing the entire structure of a hydraulic excavator including another embodiment of the reinforcing device for the constituent members of the construction machine of the present invention, and FIG. 9 (b) is the upper surface of this hydraulic excavator. It is a figure.

In FIGS. 9 (a) and 9 (b), 62 is a comparatively small so-called offset type hydraulic excavator, and 63L and 63R are left and right endless track crawler tracks (crawlers) which are traveling means. Reference numeral 64 denotes a traveling body provided with these endless track crawler tracks 63L and 63R, 65 denotes a revolving body rotatably mounted on the upper portion of the traveling body 64, 66 denotes a revolving frame forming a base lower structure of the revolving body 65, 67
Is a multi-joint type working device connected to the substantially central portion of the upper swing body 65, and 68 is a driver's cab provided on the swing frame 66. The revolving frame 66 has a revolving structure supporting member 6 that supports the revolving structure 65 at a substantially central portion thereof.
9 (see FIG. 13 described later).

Reference numeral 70 denotes a lower boom whose base end portion is connected to the substantially central portion of the revolving structure support member 69 so as to be vertically rotatable (movable to the elevation), and 71 is the lower boom 70.
An upper boom rotatably connected in the left-right direction to the tip of the upper boom 71; an arm cylinder bracket 72 rotatably connected in the left-right direction to the tip of the upper boom 71;
Numeral 73 is an arm rotatably connected to the tip of the arm cylinder bracket 72 in the vertical direction, 74 is an excavation bucket rotatably connected to the tip of the arm 73 in the vertical direction, and 75 is the lower boom 70. Is connected to the arm cylinder bracket 72, 76 is a boom hydraulic cylinder for driving the lower boom 70, and 77 is connected to the lower boom 70 together with the upper boom 71 so as to be rotatable in the left-right direction. An offset hydraulic cylinder for driving, 78 is an arm hydraulic cylinder for driving the arm 73, and 79 is a bucket hydraulic cylinder for driving the excavation bucket 74. The working device 67 includes the lower boom 70, the upper boom 71, the arm cylinder bracket 72, the arm 73, the excavation bucket 74, the stay 75, the boom hydraulic cylinder 76, the offset hydraulic cylinder 77, the arm hydraulic cylinder 78, and the bucket hydraulic pressure. A cylinder 79 is provided.

In the working device 67 configured as described above, when the offset hydraulic cylinder 77 extends, the upper boom 71 turns in the C direction in FIG. 10, and when the offset hydraulic cylinder 77 contracts, the D direction in FIG. The upper boom 71 turns. At this time, the stay 75
As a result, the upper boom 71 turns while the arm cylinder bracket 72 always faces the front of the hydraulic excavator 62. That is, as shown in FIG. 10, the upper boom 71 can be turned in the left-right direction with the arm cylinder bracket 72, the arm 73, and the excavation bucket 74 facing forward.

In the hydraulic excavator 62 having such a structure, the arm cylinder bracket 72 and the revolving structure support member 69 will be taken as an example to describe the detailed structure of the reinforcing device in the constituent members of the construction machine.

(3) Arm Cylinder Bracket 72 FIG. 11A is a partial perspective view showing a part of the working device 67 shown in FIG. 9A in the vicinity of the arm cylinder bracket 72. (B) is FIG. 11 (a)
It is a side view showing the detailed structure of the arm cylinder bracket 72 shown in FIG. 11 (a) and 11 (b).
In the figure, 80 is a cylinder cover part, 81 is a connecting part that connects the upper boom 71 and the arm 73, and the arm cylinder bracket 72 is composed of the cylinder cover part 80 and the connecting part 81.

Reference numeral 80a denotes a bottom plate having an end bent at the boom side (right side in FIG. 11B), which is bent upward.
Reference numerals 80b and 80b denote side plates which are erected at both ends on the bottom plate 80a. The cylinder cover portion 80 includes the bottom plate 80a and the side plates 80b and 80b, and has a box shape in which the upper side and the arm side (left side in FIG. 11B) are opened.

Pins 82 for connecting the arm cylinder bracket 72 and the arm hydraulic cylinder 78 are provided at the boom side ends of the side plates 80b, 80b (see FIG. 9A).
Through holes 83 for insertion are formed respectively. The pin 82 is inserted through the through holes 83, 83 provided in the side plates 80b, 80b and the base end of the arm hydraulic cylinder 78, whereby the arm cylinder bracket 72 is inserted.
The arm hydraulic cylinder 78 is rotatably connected.

At this time, the cylinder cover side plate 80
Inner surfaces of b and 80b (surfaces of the side plates 80b and 80b located on the inner side in the width direction of the arm cylinder bracket 72) 8
Reinforcing plates 84 each having a shape surrounding the through hole 83 are joined by welding in the vicinity of the through hole 83 of 0b1 and 80b1 in order to improve the strength of the cylinder cover portion 80. Similar to the reinforcing plate 34 in the above-described embodiment, the reinforcing plate 84 has its outer peripheral end surface 84a and the inner surface 80b1 of the cylinder cover side plate 80b welded over the entire circumference of the reinforcing plate 84. In addition to the inner surface 80b1, the inner surface 80b1 is welded by laser welding so that a region inside the outer peripheral end surface 84a of the reinforcing plate 84 is melted from the surface to the inside of the side plate 80b. They are joined to 80b1 respectively. In addition, 85 is a weld metal part by this deep penetration welding.

On the other hand, the connecting portion 81 has side plates 81a and 8a.
1a, a curved inner plate 81b (see FIG. 12 described later) arranged between the side plates 81a, 81a, and the side plate 81.
It is provided with upper boom connecting plates (not shown) disposed on the upper and lower sides on the boom side between a and 81a.

A through hole 87 for inserting a pin 86 (see FIG. 9A) for connecting the arm cylinder bracket 72 and the arm 73 is provided at the arm side end of the side plates 81a, 81a.
Are drilled respectively. The pin 86 is the side plate 81.
The arm cylinder bracket 72 and the arm 73 are connected so as to be vertically rotatable by being inserted into the through holes 87, 87 provided in a and 81a and the base end of the arm 73. There is. Further, the upper boom connection plate is provided with through holes (not shown) for inserting the pins (not shown) for connecting the upper boom 71 and the arm cylinder bracket 72, respectively. The upper boom 71 and the arm cylinder bracket 72 are rotatably connected in the left-right direction by being inserted through the through holes of the upper boom connection plate and the tip end portion of the upper boom 71. With such a structure, the upper boom 71 and the arm 73 are vertically moved via the connecting portion 81 of the arm cylinder bracket 72.
It is connected so as to be rotatable in the left-right direction.

At this time, the connecting portion side plates 81a, 81a
Reinforcing plates 88 are respectively welded to the outer surfaces 81a1 and 81a1 near the through hole 87 so as to surround the through hole 87 in order to improve the strength of the connecting portion 81. Similar to the reinforcing plate 84, the reinforcing plate 88 has an outer peripheral end surface 88a and the outer surface 81 of the connecting portion side plate 81a.
a1 and fillet welding are performed over the entire circumference of the reinforcing plate 88, and, for example, by laser welding so that a region inside the outer peripheral end surface 88a of the reinforcing plate 88 is melted from the surface to the inside of the connecting portion side plate 81a. The outer surfaces 81a1 and 81a1 are joined to each other by deep-penetration deep-welding welding in a substantially linear shape. In addition, 89 is a weld metal part by this deep penetration welding.

On the other hand, a bracket 90 for connecting the stay 75 is provided on the left side plate 81a of the connecting portion side plates 81a, 81a so as to project in a substantially horizontal direction. This bracket 90 is an upper bracket 90
a and a lower bracket 90b, and these upper and lower brackets 90a, 90b have through holes 90a1, 90 for inserting pins (not shown) for connecting to the stay 75.
b1 is bored.

FIG. 12 is a horizontal sectional view taken along the line XII-XII in FIG. 11 (b). In FIG. 12, a substantially donut-shaped boss plate 91 is welded to a position corresponding to the through hole 90b1 on the inner surface (upper surface) 90b2 of the lower bracket 90b. This boss plate 91 is the outer boss plate 51 in the above-described embodiment.
Similarly, in addition to the circumferential outer peripheral end surface 91a and the inner surface 90b2 of the lower bracket 90b being fillet welded over the entire circumference of the boss plate 91, the outer peripheral end surface 91a of the boss plate 91 is also provided. The inner region 90b2 is joined to the inner surface 90b2 by laser welding such that a plurality of lines (in the present embodiment, one line) are deeply welded so that the inner region melts from the surface to the inside of the lower bracket 90b. There is. At this time, 92 is a weld metal portion formed by this deep penetration welding.

As for the upper bracket 90a, the inner surface 90a2 is formed by the fillet welding and the deep penetration welding by the laser welding similarly to the lower bracket 90b.
The boss plate 93 is joined to the.

The welding structure of the deep penetration welding by laser welding in the reinforcing plates 84, 88 and the boss plates 91, 93 described above is the same as the welding structure of the reinforcing plate 34 shown in FIG. 3 described in the above-mentioned one embodiment. It is the same.

In the above description, the hydraulic excavator 62 constitutes the construction machine described in each of the claims, and the arm cylinder bracket 72 constitutes the working arm provided on the construction machine so as to be able to move up and down. 80b, 80b,
Connection part side plates 81a, 81a, and upper / lower bracket 90
Reference numerals a and 90b constitute constituent members which constitute at least a part of the construction machine, and the upper and lower brackets 90a and 9b among them.
0b also constitutes a connecting member in the construction machine. Further, the reinforcing plates 84, 88 and the boss plates 91, 93 constitute at least one reinforcing member joined to the constituent members, and the weld metal parts 85, 89, 92 define regions inside the outer peripheral end surface of the reinforcing member. A deep-penetration weld portion formed by deep-penetration welding in which the surface of the reinforcing member 84 and the boss plates 91, 93 and the weld metal portions 85, 89, 92 are formed by deep-penetration welding. A reinforcing device for the constituent members of. Also, the cylinder cover portion side plate inner surfaces 80b1 and 80b1 and the bracket inner surfaces 90a2 and 9
0b2 constitutes the outer surface of the component.

In this way, the arm cylinder bracket 72
By configuring, like the above-described one embodiment,
Reinforcing plate 84 provided on cylinder cover portion 80, connecting portion 81
It is possible to relieve the stress concentration of the welding bead in the fillet welding on the reinforcing plate 88 provided on the base plate and the boss plates 91 and 93 provided on the bracket 90. Therefore, the reinforcing plate 84,
The reinforcing function of 88 and the boss plates 91 and 93 can be sufficiently maintained. Further, as a result, the strength reliability of the entire arm cylinder bracket 72 can be improved.

Further, according to the above-mentioned reinforcing method, the reinforcing plates 84, 88 and the boss plates 91, 88 are
Since the fixing work of the fillet welding 93 and the deep penetration welding of 93 can be performed from the outside of the arm cylinder bracket 72, the good workability in the fixing work of the reinforcing plates 84 and 88 and the boss plates 91 and 93 can be maintained. There is also an effect that can be.

In the above description, the boss plates 91, 93 of the bracket 90 for connecting the stay 75 provided on the arm cylinder bracket 72 have been described as an example, but the present invention is not limited to this and is provided, for example, on the lower boom 70. Stay 75 connecting bracket 94 (see FIG. 9A), the offset hydraulic cylinder 77 connecting bracket 95
It is needless to say that a similar welding structure can be applied to the offset hydraulic cylinder 77 connecting bracket 96 (see FIG. 9A) provided on the upper boom 71 (see FIG. 9A). .

(4) Revolving structure support member 69 FIG. 13 (a) is a partial perspective view showing a part of the revolving structure 65 shown in FIG. 9 (a) in the vicinity of the revolving structure support member 69. 13 (b) is a perspective view showing a detailed structure of the revolving unit support member 69 shown in FIG. 13 (a). In FIGS. 13A and 13B, 97 is a base portion, 98 and 98 are a pair of working device brackets that are erected on the base portion 97, and the revolving structure support member 69 is the base. It is provided with a part 97 and working device brackets 98, 98.

An internal gear 99 is fixed below the base portion 97, and a swivel base bearing (not shown) having a built-in hydraulic motor (not shown) for swiveling disposed substantially at the center of the traveling body 64 is provided. ) Meshes with this, the revolving unit 65 revolves with respect to the traveling unit 64.

Through-holes 101 for inserting pins 100 for connecting the revolving structure support member 69 and the lower boom 70 are formed in the upper ends of the working device brackets 98, 98, respectively.

Also, the working device brackets 98, 9
Between the eight parts, the boss member 102 is provided between these work device brackets 98, 9 for the purpose of improving the strength of the revolving structure support member 69.
It is provided so as to be sandwiched between 8. This boss member 10
2 is the bottom plate portion 102a and the left side on the bottom plate portion 102a.
The reinforcing plate portions 102b and 102b are provided upright at both ends on the right side. The reinforcing plate portions 102b and 102b are provided with through holes 103 and 103 for inserting the pins 100, respectively. These through holes 103, 103 are provided in the working device brackets 98, 98, and the through holes 1
The boss member 102 is disposed between the working device brackets 98 and 98 so as to coincide with 01 and 101.

At this time, the boss member 102 is reinforced by the inner surfaces of the working device brackets 98, 98 (the surfaces of the working device brackets 98, 98 located inside the hydraulic shovel 62 in the width direction) and the reinforcing members. Plate portion 102b,
In addition to the outer peripheral end surfaces 102b1 and 102b1 of 102b being fillet welded over the entire circumference of the reinforcing plate portion 102b,
The outer peripheral end surface 102b of the reinforcing plate portions 102b, 102b
Laser welding is used to weld a plurality of regions deeper than 1,102b1 from the surface to the inside of the working device brackets 98, 98, for example, in a substantially straight line by deep penetration welding, thereby joining the inner surfaces 98a, 98a, respectively. Has been done. In addition, 104 is a weld metal part by this deep penetration welding.

The pin 100 is attached to the working device brackets 98, 98 to which the boss member 102 is thus attached.
Is a plurality (three in the present embodiment) of washers 105 from the left side of the hydraulic excavator 62, the through hole 101 of the working device bracket 98 arranged on the left side in the width direction, and the through hole 103 of the reinforcing plate portion 102b. , The base end portion of the lower boom 70, the through hole 103 of the reinforcing plate portion 102b disposed on the right side in the width direction, and the through hole 1 of the working device bracket 98.
By being sequentially inserted into 01, the revolving structure support member 69
And the lower boom 70 are rotatably connected.

On the other hand, on the outer surface 98b of the bracket 98 on the left side in the width direction of the working device brackets 98, 98 (the surface of the bracket 98 positioned outside the hydraulic shovel 62 in the width direction), the rotation of the pin 100 is performed. A stopper 106 for prevention is provided. The stopper 106 has a U-shape, and when the head protrusion 100a of the pin 100 is fitted into the recess 106a, the lower boom 7 is formed.
It is designed to prevent the pin 100 from rotating when 0 is rotated.

The stopper 106 includes the outer surface 98b of the working device bracket 98 on the left side and the stopper 10.
6 is welded to the outer peripheral end face 106b of the stopper 106 over the entire circumference of the stopper 106, and laser welding is performed so that a region inside the outer peripheral end face 106b of the stopper 106 is melted from the surface to the inside of the working device bracket 98. By, for example, a plurality of deep-penetration deep-penetration welds are formed in a substantially straight line, so that the outer surface 98b is joined. At this time, 107 is a weld metal portion formed by this deep penetration welding.

The reinforcing plate portion 1 of the boss member 102 described above.
The welding structure of the deep penetration welding by laser welding of 02b, 102b and the stopper 106 is the same as the welding structure of the reinforcing plate 34 shown in FIG. 3 described in the above-described one embodiment.

In the above, the working device bracket 9
Reference numerals 8 and 98 configure constituent members that configure at least a part of the construction machine described in each of the claims, and also configure a connection member in the construction machine. In addition, the reinforcing plate 1
02b, 102b and the stopper 106 constitute at least one reinforcing member joined to the constituent member, and the weld metal portions 104, 107 allow the region inside the outer peripheral end surface of the reinforcing member to melt from the surface to the inside of the constituent member. The reinforcement plate portions 102b and 102b, the stopper 106, and the weld metal portions 104 and 107 constitute a reinforcement device for the components of the construction machine. Also, the inner surface 9 of the bracket for the working device
8a and 98a constitute the outer surface of the component.

By constructing the revolving structure support member 69 in this manner, the reinforcing plate portions 102b and 102b and the left side of the boss member 102 provided on the working device brackets 98 and 98 are arranged in the same manner as in the above-described embodiment. The stress concentration of the welding bead in the fillet welding at the stopper 106 provided on the outer surface 98b of the working device bracket 98 can be relaxed. Therefore, the boss member 102 and the stopper 10
The reinforcing function of 6 can be sufficiently maintained. Further, as a result, the strength reliability of the revolving structure support member 69 can be improved.

According to the reinforcing method, the boss member 102 and the stopper 106 are the same as in the above-described embodiment.
Since the fixing work by fillet welding and deep penetration welding can be performed from the outside of the revolving structure support member 69, there is also an effect that good workability in the fixing work of the boss member 102 and the stopper 106 can be maintained. .

Next, still another embodiment of the reinforcing device and the reinforcing method for the constituent members of the construction machine of the present invention is shown in FIG.
It will be described below with reference to FIGS. In this embodiment, the present invention is applied to an excavating bucket of a relatively large loader type hydraulic excavator, in contrast to the relatively small hydraulic excavator described in the above-described one embodiment and other embodiments. is there. FIG. 14 is a side view showing the overall structure of a hydraulic excavator including still another embodiment of the reinforcing device for the constituent members of the construction machine of the present invention.

In FIG. 14, 108 is a relatively large so-called loader type hydraulic excavator as described above, and 109L and 109R are left and right endless track crawler tracks (in FIG. Tracked Track 10
9L only is shown), 110 is these endless track tracks 109
A traveling body provided with L and 109R, 111 is the traveling body 11
0 is a revolving structure mounted on the upper part of 0 so as to be revolvable, and 112 is a revolving frame forming a base lower structure of the revolving structure 111, 11
Reference numeral 3 is an articulated work device attached to the front side of the revolving structure 111, and 114 is a driver's cab provided on the revolving frame 112.

Further, 115 is the revolving structure 111 whose base end is
, A boom rotatably connected to the front side of the boom 116, an arm rotatably connected to the tip of the boom 115,
Reference numeral 117 is an excavation bucket rotatably connected to the tip of the arm 116, 118 is a boom hydraulic cylinder for driving the boom 115, and 119 and 120 are hydraulic pressures for the first and second arms for driving the arm 116. Cylinder, 1
Reference numeral 21 is a bucket hydraulic cylinder that drives the excavation bucket 117. The working device 113 includes the boom 115, the arm 116, the excavation bucket 117, the boom hydraulic cylinder 118, the first and second arm hydraulic cylinders 119 and 120, and the bucket hydraulic cylinder 121.
Is equipped with.

In the hydraulic excavator 108 having such a structure, the detailed structure of the reinforcing device in the constituent members of the construction machine will be described below by taking the excavation bucket 117 as an example. FIG. 15 is a perspective view showing the detailed structure of the excavation bucket 117 in a partially exploded manner. In this FIG.
122 is a front bucket, 123 is a rear bucket, and the excavation bucket 117 is these front buckets 12.
2 and the rear bucket 123. The front bucket 122 includes a bottom plate 124 and the bottom plate 1
24, a plurality of claws 125 provided on the front side, side plates 126, 126 erected at both ends of the bottom plate 124, bosses 127, 127 provided at the upper ends of the side plates 126, 126, respectively, and these bosses. Front brackets 128 and 128 provided on the upper portions of 127 and 127, respectively
It is composed of and.

The rear bucket 123 has a front plate 129.
And the side plates 130 arranged at both ends of the front plate 129,
130 and a bottom plate (not shown). On the outer surface 129a of the front plate 129, a pair of rear brackets 131, 131 for connecting the front bucket 122 are provided at positions corresponding to the bosses 127, 127 of the front bracket 122. These rear brackets 131, 131 have pins 132 (see FIG. 16 to be described later) for connecting the front bucket 122 and the rear bucket 123.
(See (b)) Through holes 131a for insertion are formed respectively, and the pin 132 is inserted into the rear bracket through hole 131a and the boss 127, whereby the front bucket 122 and the rear bucket 123 rotate. Connected possible.

The front bucket 122 and the rear bucket 123, which are rotatably connected in this manner, are driven by a pair of dump cylinders 133, 133 (see FIG. 16 described later). That is, the front brackets 128, 128 have pins 1 for connecting the front bracket 128 and the dump cylinder 133.
34 (see FIG. 16B described later) through hole 128 for insertion
a and 128a are provided respectively, and the pin 13
4 is inserted into the front bracket through hole 128a and the tip of the dump cylinder 133,
The front bracket 128 and the dump cylinder 133
Is connected to the tip of the rotatably.
In addition, through holes 136 and 136 for inserting a pin 135 (see FIG. 16, which will be described later) for fixing the dump cylinder 133 are formed at lower ends of the rear bracket side plates 130, 130, respectively, and the pin 135 is formed in the through hole. The dump cylinder 133 is fixed to the rear bracket side plate 130 by being inserted through the lower ends of the 136 and the dump cylinder 133.

FIG. 16 is a side view showing the structure of the excavation bucket 117 during cloud and dump operation.
16A shows the cloud time, and FIG. 16B shows the dump time. Due to the structure of the bucket 117 as described above, when the dump cylinder 133 extends, the front bucket 122 and the rear bucket 12 are expanded as shown in FIG.
When the dump cylinder 133 is shortened due to the state of contact with 3 (that is, the state at the time of cloud), FIG.
Front bucket 122 and rear bucket 1 as shown in
23 is rotated about the pin 132 as an axis so that the bottom of the excavation bucket 117 is opened (that is, a state at the time of dumping).

Returning to FIG. 15, on the front side of the outer surfaces 126a, 126a of the side plates 126, 126 of the front bucket 122, as in the case of the excavation bucket 18 'described in the modification of the above-described one embodiment, the front surface is provided. Bucket 1
Double side plate 1 for the purpose of improving the strength and wear resistance of 22
37 and 137 are attached. These double side plates 13
7, the outer peripheral end surface 137a is fillet welded over the entire circumference of the double side plate 137 by, for example, arc welding, and the front bucket side plate 12 from the surface of the inner region thereof.
The outer surface 12 is welded by laser welding so that it penetrates deeply into the inside of the pipe 6, for example, in a plurality of deep welds in a substantially straight line.
6a, respectively. 138 is a weld metal portion formed by the deep penetration welding.

On the other hand, the front plate 129 of the rear bucket 123
Similarly, on the outer surface 129a of the rear bucket 123
A plurality of double front plates 139 are attached for the purpose of improving the strength and the abrasion resistance. These double front plates 139
Are rectangular plates, each of which is composed of a relatively long plate 139a and a relatively short plate 139b. These double front plates 139 are respectively attached to a plurality of positions in the width direction of the excavation bucket 117 so as to be substantially parallel to each other.
9b is provided with the long plate 139a on the inside other than both ends thereof.

These long plates 139a are the same as the double side plates 1 described above.
Similarly to 37, the outer peripheral end surface 139a1 has the long plate 13
In addition to being fillet welded over the entire circumference of 9a, a substantially straight line is formed in the longitudinal direction (or in the lateral direction) by laser welding so that the inner region thereof is melted from the surface to the inside of the rear bucket front plate 129. Each of the outer surfaces 129a is joined to the outer surface 129a by deep-penetration deep welding. Similarly to the long plate 139a, the short plate 139b is joined to the outer surface 129a by deep penetration welding of the inner region in addition to the fillet welding of the outer peripheral end face 139b1. At this time, 1
Reference numeral 40 denotes a weld metal portion formed by deep penetration welding of the long plate 139a and the short plate 139b.

Further, the through holes 136, 136 of the outer surfaces 130a, 130a of the rear bucket side plates 130, 130 are formed.
Similarly, in order to improve the strength and wear resistance of the rear bucket 123, the double side plates 141 and 141 are provided in the vicinity of the through hole 1.
Each of them is attached so as to cover 36. These double side plates 141 are, for example, substantially laser welded so that the outer peripheral end face 141a is welded over the entire circumference in the same manner as described above and the inner region thereof is melted from the surface to the inside of the rear bucket side plate 130. Each of the outer surfaces 130a is joined to each other by being linearly deep-melted and welded. At this time, 142 is a weld metal portion formed by this deep penetration welding.

Although not shown, double bottom plates are also attached to the outer surfaces of the front bucket bottom plate 124 and the rear bucket bottom plate, respectively, and these double bottom plates are similarly fillet welded on the outer peripheries. In addition to that, by deep-penetrating the inner area by laser welding,
It is joined to the front bucket bottom plate 124 and the rear bucket bottom plate, respectively.

The double side plates 137, 141, the double front plate 139, and the double bottom plate having the deep welded welding structure by the laser welding have the reinforcement structure shown in FIG. It is similar to the welded structure of the plate 34.

In the above, the hydraulic excavator 108 constitutes the construction machine described in each claim, and the front bucket side plates 126, 126 and the bottom plate 124, the rear bucket front plate 129 and the side plates 130, 130 are the construction machine. A constituent member that constitutes at least a part is configured. Also,
The double side plates 137, 141 and the double front plate 139 constitute at least one reinforcing member joined to the constituent members,
The weld metal parts 138, 140, 142 constitute deep penetration weld parts formed by deep penetration welding in which a region inside the outer peripheral end face of the reinforcing member is melted from its surface to the inside of the constituent member, and these double side plates 137 are formed. , 141, the double front plate 139, and the weld metal parts 138, 140, 142 constitute a reinforcing device for the components of the construction machine.

By constructing the excavation bucket 117 in this way, the double side plate 1 can be constructed in the same manner as in the above-described embodiment.
37, 141, the double front plate 139, and the double bottom plate, the stress concentration of the welding beads of the fillet weld can be relaxed. Therefore, the reinforcing function of the double side plates 137, 141, the double front plate 139, and the double bottom plate can be sufficiently maintained. As a result, the strength reliability and wear resistance of the entire excavation bucket 117 can be improved.

Further, according to the above reinforcing method, as in the above-described embodiment, the fixing work of the double side plates 137, 141, the double front plate 139, and the double bottom plate by fillet welding and deep penetration welding. Since it can be performed from the outside of the excavation bucket 117, there is also an effect that good workability in the fixing work of the double side plates 137 and 141, the double front plate 139, and the double bottom plate can be maintained.

Next, still another embodiment of the reinforcing device and the reinforcing method for the constituent members of the construction machine of the present invention is shown in FIG.
The following description will be made with reference to FIGS. In the present embodiment, the present invention is applied to a relatively large backhoe type hydraulic excavator, as opposed to the relatively large loader type hydraulic excavator described in the above-described still another embodiment. FIG. 17 is a side view showing the overall structure of a hydraulic excavator including still another form of the reinforcing device for the constituent members of the construction machine of the present invention. In FIG. 17, 143 is a relatively large so-called backhoe type hydraulic excavator as described above, and 144L and 144R are left and right endless track tracks (however, in FIG. 17, the left endless track track is shown in FIG. 17). (Only 144L is shown) 145 is a running body equipped with these crawler tracks 144L and 144R, 146 is a turning body mounted on the upper part of this running body 145 so as to be turnable, and 14
Reference numeral 7 denotes a revolving frame forming a lower structure of the revolving structure 146, 148 denotes an articulated working device attached to the front side of the revolving structure 146, and 149 denotes the revolving frame 14
It is a driver's cab provided above 7.

Further, the base end portion of 150 is the revolving structure 146.
On the other hand, a boom connected so as to be able to move up and down, 151 is an arm rotatably connected to the tip of the boom 150,
Reference numeral 152 is an excavation bucket rotatably connected to the tip of the arm 151, 153 is a boom hydraulic cylinder for driving the boom 150, 154 is an arm hydraulic cylinder for driving the arm 151, and 155 is the excavation bucket. This is a bucket hydraulic cylinder that drives 152.
The working device 148 includes the boom 150 and the arm 1.
51, excavation bucket 152, boom hydraulic cylinder 15
3, an arm hydraulic cylinder 154, and a bucket hydraulic cylinder 155.

In the hydraulic excavator 143 having such a structure, the detailed structure of the reinforcing device as a constituent member of the construction machine will be described below by taking the arm 151 as an example. In a backhoe type hydraulic excavator such as the hydraulic excavator 143 having the above-mentioned configuration, rocks, crushed stones, and other excavated materials are piled up in the excavation bucket 152 during excavation work, and in this state, the excavation bucket 152 is rapidly rotated.
When the turning operation of the revolving structure 146 is performed, the excavated material may spill from the excavation bucket 152 toward the arm 151 due to vibration and impact at this time. A protection member is provided on the cloud-side surface of the arm 151 to prevent the arm 151 from being worn or damaged by the spilled excavated material.

FIG. 18 shows the working device 148 shown in FIG.
FIG. 19 is a partial side view of the vicinity of the connecting portion of the arm 151 and the excavation bucket 152 extracted from FIG.
It is the arrow view of the arm 151 seen from the direction of the middle E (however, the excavation bucket 152 is not shown). These FIG. 18 and FIG.
In FIG. 9, 156 is an arm protection member, 157 is a reinforcing plate, 158 is a protection plate, and the arm protection member 156.
Is composed of the reinforcing plate 157 and a plurality of protective plates 158.

The reinforcing plate 157 is a flat plate made of, for example, a steel material and thinner than the inner peripheral side plate 151a on the cloud side of the arm 151, and has a width substantially equal to that of the inner peripheral side plate 151a. .

The protective plate 158 is, for example, a square steel material having a substantially square pole shape, and is arranged at a plurality of positions in the width direction (five in the present embodiment) at equal intervals along the longitudinal direction of the arm 151. It is joined to the reinforcing plate 157 by welding.

The arm protection member 156 thus configured has the outer surface 15 of the arm inner peripheral side plate 151a.
1a1 and the outer peripheral end surface 157a of the reinforcing plate 157 (see FIG. 19) are fillet-welded over the entire circumference of the reinforcing plate 157, and the region inside the outer peripheral end surface 157a of the reinforcing plate 157 extends from the surface to the arm. The outer surface 151a is welded to the inside of the inner side plate 151a by laser welding, for example, by a plurality of deep deep penetration welds in a substantially linear shape.
It is joined to 1. 20 shows the detailed structure of the joint portion between the arm protection member 156 and the arm inner peripheral side plate 151a at this time, and the arm 151 according to the XX-XX section in FIG.
FIG. At this time, 159 is a weld bead by the fillet welding, and 160 (see also FIG. 19) is a weld metal part by the deep penetration welding.

In the above description, the hydraulic excavator 143 constitutes the construction machine according to the claims and the arm 15
1 constitutes a working arm that constitutes a working device of a construction machine,
The arm inner peripheral side plate 151a constitutes a constituent member that constitutes at least a part of the construction machine. In addition, the reinforcing plate 157
Constitutes at least one reinforcing member joined to the constituent member, and the welding bead 159 constitutes a fillet weld portion formed by performing fillet welding between the outer surface of the constituent member and the outer peripheral end face of the reinforcing member. Then, the weld metal portion 160 constitutes a deep penetration welding portion formed by deep penetration welding in which a region inside the outer peripheral end surface of the reinforcing member is melted from its surface to the inside of the constituent member, and these reinforcing plate 157 and the welding bead are formed. 159 and the weld metal part 160 constitute a reinforcing device for the components of the construction machine.

By constructing the arm 151 in this way, it is possible to relieve the stress concentration on the welding bead 159 of the fillet welding on the reinforcing plate 157, as in the case of the above-described embodiment. Therefore, the reinforcing function of the reinforcing plate 157 can be sufficiently maintained. Further, as a result, the protection function of the protection member 156 can be sufficiently maintained, whereby the strength reliability and wear resistance of the arm 151 can be improved.

Further, according to the above-mentioned reinforcing method, as in the case of the above-described embodiment, since the fixing work of the reinforcing plate 157 by the fillet welding and the deep penetration welding can be performed from the outside of the arm 151, the reinforcing method can be performed. There is also an effect that good workability in fixing the plate 157 can be maintained.

Next, still another embodiment of the reinforcing device and the reinforcing method for the constituent members of the construction machine of the present invention is shown in FIG.
Will be described below with reference to. In contrast to the four embodiments described above, which are fundamental structural reinforcements for attaching a reinforcing plate at the time of manufacturing a hydraulic excavator, the present embodiment is directed to the case where a crack is generated in its constituent members after the hydraulic excavator is started to be used. The present invention is applied to repair by a reinforcing plate such as. FIG. 21 shows the arm 1 described in the embodiment above.
7, a load is applied in a state where the reinforcing plate 34 is joined to the arm left side plate 25a only by fillet welding as in the conventional structure, and for example, from the toe 36a of the welding bead 36 into the arm left side plate 25a. It is sectional drawing showing the detailed structure of the joining part of the reinforcement board 34 and the left side board 25a which shows the state which cracked and this when repairing this.

In FIG. 21, the arm left side plate 25
The cracked portion of a is digged up (gouging) and then the groove 161 formed thereby is filled with the weld bead, and the reinforcing plate 162 is arranged on the groove 161 so as to align the tip with the toe 36a of the weld bead 36. ing. The reinforcing plate 162 includes the outer peripheral end surface 162 a and the left side plate 25.
In addition to the outer surface 25a1 of a (or the weld bead 36) being fillet welded over the entire circumference of the reinforcing plate 162 by, for example, arc welding, the inner region thereof is melted from the surface to the inside of the left side plate 25a. The outer surface 25a1 is joined to the outer surface 25a1 by laser welding, for example, in a substantially linear shape by deep penetration welding. In addition, 163 is a weld bead by fillet welding at this time, and 164 is a weld metal part by deep penetration welding.

In the above, the reinforcing plate 162 constitutes at least one reinforcing member joined to the constituent members described in the claims, and the welding bead 163 constitutes the outer surface of the constituent member and the outer peripheral end surface of the reinforcing member. And a fillet weld portion formed by performing fillet welding of
Numeral 4 constitutes a deep penetration welding portion formed by deep penetration welding in which a region inside the outer peripheral end surface of the reinforcing member is melted from its surface to the inside of the constituent member.
2, the weld bead 163, and the weld metal portion 164 form a reinforcing device for the components of the construction machine.

By thus repairing the cracked portion of the left side plate 25a of the arm with the reinforcing plate 162, the stress concentration of the welding bead 163 in the fillet welding on the reinforcing plate 162 can be relaxed. Therefore, the reinforcing function of the reinforcing plate 162 can be sufficiently maintained. As a result, the strength reliability of the arm 17 after repair can be improved.

Although the deep penetration welding is performed by laser welding in the five embodiments of the reinforcing device and the reinforcing method for the constituent members of the construction machine of the present invention described above, the present invention is not limited to this, but arc welding or plasma welding. It may be performed by another welding method such as welding. Similarly, in the above five embodiments, the fillet welding is performed by arc welding, but it may be performed by another welding method such as laser welding.

Further, in the above-described five embodiments of the present invention, deep penetration welding was performed so as to melt into the constituent member from the surface of the reinforcing member, but the present invention is not limited to this, and welding is performed so as to penetrate the constituent member. (So-called penetration welding) may be performed.

[0128]

According to the reinforcing device for a constituent member of a construction machine of the present invention, in addition to fillet-welding the outer peripheral end surface of the reinforcing member and the outer surface of the constituent member, the inner region thereof is formed from the surface of the constituent member. As it deeply penetrates and welds, it melts to the inside,
The stress concentration of the weld bead due to the fillet welding in the reinforcing device can be relaxed. Therefore, the reinforcing function of the reinforcing device can be sufficiently maintained.

As a result, since the reinforcing member can be firmly fixed to the relevant portion of the constituent member, the strength of the relevant portion of the constituent member is improved, and thus the strength reliability of the constituent member of the construction machine is improved. can do.

Further, according to the reinforcing method of the present invention, since the fixing work of the reinforcing member to the relevant portion of the constituent member by fillet welding and deep penetration welding can be performed from the outside of the constituent member, There is also an effect that good workability in the fixing work can be maintained.

[Brief description of drawings]

FIG. 1 is a rear perspective view and a front perspective view showing the overall structure of a hydraulic excavator including an embodiment of a reinforcement device for a component of a construction machine according to the present invention.

FIG. 2 is a partial perspective view showing a part in the vicinity of an arm of a working device of a hydraulic excavator including an embodiment of a reinforcing device for a component of a construction machine of the present invention, and a detailed structure of the arm. It is a perspective view showing.

FIG. 3 is a cross-sectional view showing a detailed structure of a joint portion between a reinforcing plate and left and right side plates of an arm, showing an embodiment of a reinforcing device for a constituent member of a construction machine of the present invention.

FIG. 4 is a partial perspective view of a working device for a hydraulic excavator including an embodiment of a reinforcing device for a component of a construction machine according to the present invention, in which a portion in the vicinity of an excavation bucket is extracted and shown, and the excavation bucket It is a perspective view showing a detailed structure.

FIG. 5 is a side sectional view taken along the line VV of the embodiment of the reinforcing device for the constituent members of the construction machine of the present invention shown in FIG. 4 (b).

FIG. 6 is a top view of an embodiment of the reinforcing device for the constituent members of the construction machine of the present invention shown in FIG. 5, viewed from the direction A.

FIG. 7 is a bottom view of an embodiment of the reinforcing device for the constituent members of the construction machine of the present invention shown in FIG. 5, viewed from the B direction.

FIG. 8 is a perspective view showing a detailed structure of a modified example of the excavation bucket, showing the embodiment of the reinforcing device for the constituent members of the construction machine of the present invention.

FIG. 9 is a side view and a top view showing the overall structure of a hydraulic excavator including another embodiment of the reinforcing device for the constituent members of the construction machine of the present invention.

FIG. 10 is a top view of a hydraulic excavator showing a turning operation of a working device of a hydraulic excavator including another embodiment of the reinforcing device for the structural members of the construction machine of the present invention.

FIG. 11 is a partial perspective view of a working device for a hydraulic excavator including another embodiment of a reinforcing device for a component of a construction machine according to the present invention, in which a part in the vicinity of an arm cylinder bracket is extracted and shown; It is a side view showing the detailed structure of a bracket.

FIG. 12 is a horizontal cross-sectional view taken along the line XII-XII of another embodiment of the reinforcing device for the structural members of the construction machine of the present invention shown in FIG. 11 (b).

FIG. 13 is a partial perspective view showing an extracted portion in the vicinity of a revolving structure support member of a revolving structure of a hydraulic excavator including another embodiment of the reinforcing device for a component of a construction machine of the present invention, and this revolving structure. It is a perspective view showing the detailed structure of a body support member.

FIG. 14 is a side view showing the overall structure of a hydraulic excavator including still another embodiment of the reinforcing device for the structural members of the construction machine of the present invention.

FIG. 15 is a partially exploded perspective view showing the detailed structure of the excavation bucket showing still another embodiment of the reinforcing device for the structural members of the construction machine of the present invention.

FIG. 16 is a side view showing the structure of the excavating bucket of the hydraulic excavator at the time of cloud and dump operation, which is provided with still another embodiment of the reinforcing device for the structural members of the construction machine of the present invention.

FIG. 17 is a side view showing the overall structure of a hydraulic excavator including still another embodiment of the reinforcing device for the structural members of the construction machine of the present invention.

FIG. 18 is a partial side view showing the vicinity of the connecting portion of the arm and the excavation bucket, of the working device of the hydraulic excavator including the reinforcing device for the constituent members of the construction machine according to the embodiment of the present invention. is there.

FIG. 19 is a view of still another embodiment of the reinforcing device for the structural members of the construction machine of the present invention shown in FIG. 18, as seen from the direction E.

20 is a transverse cross-sectional view taken along the line XX-XX of yet another embodiment of the reinforcing device for the structural members of the construction machine of the present invention shown in FIG.

FIG. 21 shows a state in which a reinforcing plate is joined to the arm left side plate only by fillet welding as in the conventional structure, and a crack is formed in the arm left side plate from the toe portion of the welding bead of the reinforcing plate and this is repaired. It is sectional drawing showing the detailed structure of the joining part of a reinforcement board and an arm left side board which shows the state at the time of doing.

[Explanation of symbols]

1 Hydraulic Excavator (Construction Machinery) 17 Arm (Working Arm) 18 Excavation Bucket 18 'Excavation Bucket 25a Left Side Plate (Constituent Member) 25a1 Outer Surface 25b Right Side Plate (Constituent Member) 25b1 Outer Surface 34 Reinforcing Plate (Reinforcing Member; Reinforcing Device) 34a Outer end face 36 Weld bead (fillet weld; reinforcing device) 37 Weld metal part (deep penetration weld; reinforcing device) 40 Bracket (constituent member; connecting member) 40a Outer surface 41 Top plate (constituent member) 41a Outer surface 41 'Top plate (constituent member) 42 Bottom plate (constituent member) 42a Outer surface 42' Bottom plate (constituent member) 43 'Side plate (constituent member) 43'a Outer surface 51 Outer boss plate (reinforcing member; reinforcing device) 51a Outer peripheral end face 57 Weld Metal Part (Deep Penetration Welding Part; Reinforcing Device) 58 Double Bottom Plate (Reinforcing Member; Reinforcing Device) 58 'Double Bottom Plate (Reinforcing Member; Supplement) Strong device) 59 Weld metal part (deep penetration weld part; reinforcement device) 60 Double side plate (reinforcement member; reinforcement device) 61 Weld metal part (deep penetration weld part; reinforcement device) 62 Hydraulic excavator (construction machine) 72 Arm cylinder Bracket (working arm) 80b Side plate (constituent member) 80b1 Inner surface (outer surface) 81a Side plate (constituent member) 81a1 Outer surface 84 Reinforcing plate (reinforcing member; reinforcing device) 84a Outer peripheral face 85 Weld metal part (deep penetration weld part; Reinforcement device 88 Reinforcement plate (reinforcement member; reinforcement device) 88a Outer peripheral end surface 89 Weld metal part (deep penetration welded part; reinforcement device) 90a Upper bracket (constituent member; connection member) 90a2 Inner surface (outer surface) 90b Lower bracket ( Component member; connection member) 90b2 inner surface (outer surface) 91 boss plate (reinforcing member; reinforcing device) 91a outer peripheral end surface 92 welding Metal part (deep-penetration welded part; reinforcing device) 93 Boss plate (reinforcing member; reinforcing device) 98 Bracket for working device (constituent member; connecting member) 98a Inner surface (outer surface) 98b Outer surface 102b Reinforcing plate part (reinforcing member) ; Reinforcement device) 102b1 Outer peripheral surface 104 Weld metal part (deep penetration weld part; reinforcement device) 106 Stopper (reinforcement member; reinforcement device) 107 Weld metal part (deep penetration weld part; reinforcement device) 108 Hydraulic excavator (construction machine) 117 Excavation bucket 124 Bottom plate (constituent member) 126 Side plate (constituent member) 126a Outer surface 129 Front plate (constituent member) 129a Outer surface 130 Side plate (constituent member) 130a Outer surface 137 Double side plate (reinforcing member; reinforcing device) 137a Outer peripheral end face 138 Weld metal part (deep penetration weld part; reinforcement device) 139 Double front plate (reinforcement member; reinforcement) Device) 139a1 Outer peripheral end face 139b1 Outer peripheral end face 140 Weld metal part (deep penetration weld part; reinforcement device) 141 Double side plate (reinforcing member; reinforcement device) 141a Outer end face 142 Weld metal part (deep penetration weld part; reinforcement device) 143 Hydraulic pressure Excavator (construction machine) 151 Arm (working arm) 151a Inner peripheral side plate (constituent member) 151a1 Outer surface 157 Reinforcing plate (reinforcing member; reinforcing device) 157a Outer peripheral end face 159 Weld bead (fillet weld portion; reinforcing device) 160 Welding Metal part (deep penetration welding part; reinforcing device) 162 Reinforcing plate (reinforcing member; reinforcing device) 162a Outer peripheral end face 163 Weld bead (fillet welding part; reinforcing device) 164 Weld metal part (deep penetration welding part; reinforcing device)

Claims (14)

[Claims] 1. A reinforcing device for a constituent member of a construction machine, comprising a reinforcing member provided on an outer surface of the constituent member, wherein the reinforcing member is fillet welded between an outer peripheral end surface of the constituent member and an outer surface of the constituent member, and A reinforcement device for a component member of a construction machine, characterized in that it is fixed to an outer surface of the component member by at least one deep penetration welding which is made to penetrate from the surface into the component member. 2. A reinforcement device for a constituent member of a construction machine for reinforcing a constituent member of at least a part of a construction machine, comprising: at least one reinforcing member joined to the constituent member; and an outer surface of the constituent member. A fillet weld formed by fillet-welding the outer peripheral end face of the reinforcing member, and a deep penetration welding in which a region inside the outer peripheral end face of the reinforcing member is melted from its surface to the inside of the constituent member. And a deep-penetration welded part to be used for reinforcing a component member of a construction machine. 3. A construction machine reinforcing apparatus according to claim 1 or 2, wherein the construction member is a working arm provided on the construction machine so that the construction machine can be raised and lowered. Reinforcement device for members. 4. The apparatus for reinforcing a component of a construction machine according to claim 1 or 2, wherein the component is an excavation bucket provided on the construction machine. 5. The apparatus for reinforcing a constituent member of a construction machine according to claim 1, wherein the constituent member is a connecting member in the construction machine. 6. A reinforcement device for a component member of a construction machine according to claim 1, wherein the deep penetration welding is at least one substantially linear welding. Reinforcement device for components. 7. The reinforcement device for a component of a construction machine according to claim 6, wherein the deep penetration welding is welding using a high-density energy heat source. 8. A reinforcement device for a constituent member of a construction machine, comprising a reinforcing member on the outer surface of the constituent member, wherein fillet welding is provided on a corner between the outer peripheral surface of the reinforcing member and the outer surface of the constituent member. And a joining area of the reinforcing member to the outer surface of the constituent member is increased by at least one deep penetration welding provided so as to melt from the outer surface of the reinforcing member into the constituent member. Reinforcing device for components of construction machinery. 9. A reinforcing device for a constituent member of a construction machine, comprising a reinforcing member provided on the outer surface of the constituent member, and fillet welding for joining the outer periphery of the reinforcing member to the outer surface of the constituent member, and the reinforcing member. Of the reinforcing member to the outside of the constituent member by deep penetration welding that joins the facing surfaces of the reinforcing member and the constituent member so as to suppress the floating of the facing surface facing the outer surface of the constituent member. A reinforcement device for a component member of a construction machine, which is fixed to a surface. 10. A working device for a construction machine comprising a reinforcing member provided on an outer surface of a constituent member of the working device for a construction machine, wherein the reinforcing member is fillet welded between an outer peripheral end surface of the reinforcing member and an outer surface of the constituent member. And a work device for a construction machine, wherein the work device is fixed to the outer surface of the constituent member by at least one deep penetration welding which is made to penetrate from the surface to the inside of the constituent member. 11. A working arm of a construction machine comprising a reinforcing member provided on an outer surface of a working arm constituting a working device of a construction machine, wherein the reinforcing member has a corner between an outer peripheral end surface of the working arm and an outer surface of the working arm. Meat welding and at least one deep penetration welding which is made to penetrate from the surface thereof into the outer surface of the working arm,
A working arm for a construction machine, wherein the working arm is fixed to an outer surface of the working arm. 12. An excavation bucket for a construction machine, wherein a reinforcement member is provided on an outer surface of the excavation bucket which constitutes a working device of the construction machine. The reinforcement member has a peripheral edge surface and a outer surface of the excavation bucket. An excavation bucket for a construction machine, wherein the excavation bucket is fixed to the outer surface of the excavation bucket by meat welding and at least one deep penetration welding that is made to penetrate from the surface thereof into the outer surface of the excavation bucket. 13. A connecting member of a construction machine, comprising a reinforcing member provided on an outer surface of a connecting member constituting a working device of a construction machine, wherein the reinforcing member has a corner between an outer peripheral end surface of the connecting member and an outer surface of the connecting member. A connecting member for a construction machine, wherein the connecting member is fixed to the outer surface of the connecting member by meat welding and at least one deep penetration welding that is made to penetrate from the surface to the inside of the outer surface of the connecting member. 14. A method of reinforcing a constituent member of a construction machine, wherein a reinforcing member is provided on the outer surface of the constituent member, wherein fillet-welding is performed between the outer peripheral end face of the reinforcing member and the outer surface of the constituent member. A construction machine characterized by fixing the reinforcing member to the outer surface of the constituent member by deep penetration welding at least one location of the reinforcing member so as to melt into the constituent member from the surface of the reinforcing member. Reinforcement method for components.