JPS6129799Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is applicable to extensible elongated bodies such as extensible leaders and arms in construction machines such as pile drivers, hydraulic power shovels, and truck cranes, or extensible elongated bodies such as extensible elongated bodies in other machines and devices. It relates to a body reinforcement device.

Generally, in construction machinery as mentioned above,
A leader that suspends and guides a pile body, a pile driver, etc., an arm that supports a shovel or a crane, a boom, and other elongated bodies, and these elongated bodies stand upright on the main body or protrude from the main body. It is attached to the main body in such a way that it can be moved in one position and in another in a tilted or folded position on the main body.

Figure 1 shows a conventional pile driver equipped with a long leader (long body), in which a is a long leader attached to a self-propelled base machine (main body) so that it can be turned upside down. , c is a backsteer (one set on the left and right) that supports the leader a in an upright working position, 3 is a driving machine attachment, and 5 is a hydraulic cylinder that operates the leader a upside down between an upright working position and a reclined moving position. As shown in FIG. 1A, the leader a is supported by the backsteer c and placed in an upright working position, and the backsteer c is applied to the leader a as shown in FIG. A is folded down from C to D in Fig. 1, and placed in a moving position with the leader a and back stick c folded down on the base machine b as shown in Fig. 1D, and conversely, the hydraulic cylinder 5 is extended to move the leader Figure 1A
This type of pile driver requires a strong long leader a that suspends and guides the long and heavy pile body and the pile driver. In order to maintain the working posture shown in Figure A, the center of gravity of base machine b is set at position _G1 , but in the moving position shown in Figure 1D, the center of gravity is at position _G2 behind base machine b. The base machine a becomes unstable, and the leader a protrudes for a long time from the rear of the base machine a, which is a major obstacle when moving the base machine a.

Therefore, conventionally, in the elongated bodies (e.g. leaders, arms, etc.) as described above, for example, a small-diameter elongated body is slidably inserted between the two elongated bodies, and both elongated bodies are connected by a hydraulic cylinder or the like. A structure with a stretchable elongated body that can be stretched and contracted (specific examples are omitted) is used, but with such a stretchable structure of a stretchable long body, when the body is stretched, the stretched part may lack strength. There is a limit to the amount of extension of the pile, which may hinder work, resulting in insufficient length during work or shortening during movement, making work or movement inconvenient. In cases where a strong and long leader is required, such as in a striking machine, it is practically impossible to employ the above-mentioned telescoping mechanism.

The present invention relates to an idea to solve the above-mentioned difficulties of extensible elongated bodies such as leaders and arms in conventional construction machinery, etc., by slidably inserting a small diameter elongated body between the two elongated bodies. In a construction machine or the like equipped with a connected extendable elongated body such as a leader or an arm, a split reinforcing cylinder is fitted around the outer periphery of a small diameter elongated body extending between both elongated bodies of the said extendable elongated body. It is characterized by a structure in which the split reinforcing cylinders are surrounded by a cylinder, and the split reinforcing cylinders and the elongated bodies on both sides are removably connected to each other. The object of the present invention is to provide a reinforcing device for an extendable elongated body in a construction machine or the like, which reinforces an extended small diameter elongated body portion and allows the elongated body to expand and contract significantly.

The present invention has the above-mentioned configuration, in which a small-diameter elongated body slidably inserted between both elongated extensible and retractable bodies is extended, and a split reinforcing cylindrical body is attached to the outer periphery of the elongated body. Since the divided reinforcing cylinders are fitted and enclosed, and the divided reinforcing cylinders and the long bodies on both sides are removably connected, the strength of the small-diameter long bodies extending between the long objects is insufficient. The portion is completely reinforced by the divided reinforcing cylinder, and sufficient strength and length can be obtained even if the small diameter elongated body is made long, that is, the amount of expansion and contraction is greatly increased. In addition, since the split reinforcing cylinder can be removed and the length can be significantly shortened, it can be stored on the main body, making it extremely convenient to move, and it is also possible to move long objects on a trailer without disassembling them.

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

Figures 2 to 6 show an embodiment of the pile driver of the present invention, Figure 2 is a side view showing an outline of the embodiment of the pile driver, and Figure 3 is the leader (lengthwise) shown in Figure 2. shakumono)
1 is an exploded view showing the structure of the expandable part of the
2 is a self-propelled base machine; 2 is a telescopic long object, that is, a telescopic leader; 3 is a telescopic long object attached to the base machine 1;
2 is a driving machine attachment, 4 is a backsteer that supports the telescopic leader 2 in an upright state, and 5 is a hydraulic cylinder that operates the telescopic leader 2 in an inverted state. a first elongated body 6 equipped with telescopic legs that abut on;
It consists of a second elongated body 7 whose lower end is pivotally connected 8 to the base machine 1, an elongated portion 9, and a third elongated body 10, and the elongated portion 9 is, as shown in FIG. A small diameter elongated body 1 protruding from the elongated body 10 at
3 is slidably inserted into the cylindrical portion of the elongated body 7, and the rod tip of the hydraulic cylinder 14 whose base side is fixed in the elongated body 7 is fixed 15 in the small diameter elongated body 13.
The elongated body 10 is made to expand and contract with respect to the elongated body 7, and as shown in FIG.
In the extended state, divided reinforcing cylinders 9 ₁ and 9 ₂ are fitted around the outer periphery of the small-diameter elongated body 13 to surround it, and the divided reinforcing cylinders 9 ₁ and 9 ₂ are connected to the flange 18 , respectively. , 19, 20 and flanges 21, 2
₂ , ₂₃ , and as shown in FIG.
₁ , 9 ₂ and the elongated body 7 to the flange 16 and the flange 1
8 and 21 with bolts 24, and the split reinforcing cylinders 9 ₁ and 9 ₂ and the elongated body 10 are connected to the flange 1.
7 and the flanges 19, 22 with bolts 25 to form an elongated state with an elongated portion 9 between the elongated objects 7, 10, and as shown in _FIG . ₂ is removed, the small-diameter elongated body 13 is housed in the elongated body 7 using the hydraulic cylinder 14, and the elongated bodies 7 and 10 are connected with bolts at both flanges 16 and 17 to form a shortened structure. ing.

The illustrated embodiment has the above-described structure, so when the telescopic leader 2 is extended and the split reinforcing cylinders 9 ₁ and 9 ₂ are connected to the extended portion as shown in FIG. , its divided reinforcing cylinder 9
₁ , 9 ₂ has elongated parts on both sides of the elongated body 7 , 1
0, and when the hydraulic cylinder 5 is extended from the state shown in FIG. , second elongated body 7,
The elongated portion 9 and the third elongated body 10 stand in a straight line and become a strong long leader (elongated object), so that they can sufficiently suspend and guide heavy and long pile bodies, pile drivers, etc. can do.

Also, from the state shown in Figure 2, bolts 24, 25, 2
6 is removed from the small diameter elongated body 13 and the divided reinforcing cylinder body 9 ₁ ,
9 ₂ is removed and the hydraulic cylinder 14 is shortened to shorten the telescopic leader 2 as shown in FIG. 5, the short telescopic leader 2 is placed on the base machine 1 as shown in FIG. 6. In addition, if the structure is such that the backstall 4 can be shortened by the mechanism shown in the figure, the longitudinal length in the moving position will be significantly shortened, so that in the moving position shown in FIG. It is located approximately in the center of the leader, making it stable, and also allows for transportation to uneven sites, and for loading and transporting the leader onto a trailer without disassembling it.

Furthermore, in this embodiment, even if the small-diameter elongated body 13 is formed long to greatly increase the amount of expansion and contraction, the insufficient strength during expansion is caused by the aforementioned divided reinforcing cylinders 9 ₁ , 9
₂ , it is possible to secure the necessary length and strength during work, and at the same time, the amount of shortening required for movement can be sufficiently obtained.

[Brief explanation of the drawing]

Figures 1A to D are explanatory diagrams of a conventional pile driver, Figure 2 is a side view showing an outline of an embodiment of the proposed pile driver, and Figure 3A is the structure of a telescopic elongated body (telescoping leader). FIG. 3B is a view taken along line B-B of FIG. 3A, FIG. 3C is a view taken along line C-C of FIG. 3A, and FIG. 3D is an exploded view showing
is a view taken along line D-D of the same A, FIG. 4 is an assembled view showing the extended state of the telescopic elongated body, FIG. 5 is an assembled view showing the telescopic elongated body in the shortened state, and FIG. It is a moving posture diagram. 1: Base machine, 2: Telescopic long body (telescopic leader), 4: Back steering, 5: Hydraulic cylinder,
6: first elongated body, 7: second elongated body, 9: elongated portion, 10: third elongated body, 9 ₁ , 9 ₂ : split reinforcing cylindrical body, 13: small diameter elongated body, 14: Hydraulic cylinder, 16, 17, 18, 19, 20, 21, 2
2, 23: Flange, 24, 25, 26: Connection bolt.

Claims (1)

[Scope of utility model registration request] In a construction machine, etc., equipped with a telescopic elongated body such as a leader or an arm, which is formed by slidingly inserting and connecting a small diameter elongated body between both elongated bodies, both elongated bodies of the telescopic elongated body are connected. A split reinforcing cylinder is fitted around the outer periphery of the small diameter elongated body extending between them, and the split reinforcing cylinders are removably connected to each other and the split reinforcing cylinder and the elongated body on both sides thereof. A reinforcing device for stretchable long objects in construction machinery, etc., which is characterized by a reinforced structure.