JP3048332U - Clamshell bucket - Google Patents

Abstract

(57) [Problem] To provide a clamshell bucket capable of always performing a deep digging operation reliably even in a place where the ground is hard or narrow. SOLUTION: A pair of buckets (25) is provided on a support (21).
a) (25b) is pivotally attached to open and close, and the bucket is opened and closed by a driving means (27) attached to a support, and the support is suspended by a suspension device via a wire (33). In such a clamshell bucket, the support is provided with horizontal overhanging means (43) which expands and contracts in the horizontal direction, and both ends of the horizontal overhanging means are attached to the corresponding side wall surfaces (51) (53) in the excavation place (49).
Characterized in that the support is fixed to the side wall surface by pressing the clamshell bucket.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a clamshell bucket designed for deep excavation in a narrow place.

[0002]

[Prior art]

 As clamshell buckets, those shown in FIGS. 3 and 4 are already known. In this clamshell bucket, a pair of buckets 5a, 5b are pivotally connected to the support 1 via pivots 3a, 3b so as to be openable and closable, and a drive of a hydraulic cylinder or the like in which the buckets 5a, 5b are attached to the support 1 is performed. It can be opened and closed by means 7. Reference numerals 9a and 9b denote arms connecting the driving means 7 and the buckets 5a and 5b. The buckets 5a and 5b have teeth 11a and 11b protruding at their tips, respectively.

[0003] When performing excavation work using the above-mentioned conventional clamshell bucket, any of the following methods is used.

(A) As shown in FIG. 3, the clamshell bucket is suspended by a suspending device such as a crane via a wire 13, and the driving means is provided with the teeth 11 a and 11 b of the buckets 5 a and 5 b grounded. 7, the buckets 5a and 5b are closed, and the teeth 11a and 11b are digged into the ground, and the buckets 5a and 5b perform excavation and earth removal. In this case, the buckets 5a and 5b provided with the teeth 11a and 11b dig into the ground by the weight of the clam shell bucket.

(B) As shown in FIG. 4, a clamshell bucket is attached to the tip of an arm 15 of a heavy-duty heavy machine, and the clamshell bucket is pushed down by the arm 15 so that the teeth 11a and 11b are digged into the ground, Excavation and earth removal are performed by 5a and 5b. In this case, the buckets 5a and 5b provided with the teeth 11a and 11b are digged into the ground by the pressing force of the arm 15 in the large heavy equipment.

[0006]

[Problems to be solved by the invention]

 The conventional clamshell buckets have the following problems in the cases (a) and (b), respectively.

[0007] In the case of (a): Since the buckets 5a and 5b dig into the ground solely by the weight of the clamshell bucket, it is difficult to excavate hard ground.

[0008] Case (b): Since heavy machinery must be carried in close to the excavation site, excavation work cannot be performed in a narrow place or on a slope. Furthermore, since the buckets 5a and 5b are made to penetrate into the ground by the pressing force of the arm 15 in the large heavy equipment, the depth that can be excavated is limited by the length of the arm 15. That is, deep excavation work is not possible.

The present invention has been made to solve the above problems and to provide a clamshell bucket capable of always performing a deep digging operation even in a place where the ground is hard or narrow. is there.

[0010]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides the following clamshell bucket.

(1) A pair of buckets are pivotally attached to a support so as to be openable and closable, and the buckets are opened and closed by driving means attached to the support, and the support is suspended by a hanging device via a wire. In a clamshell bucket that is lowered, horizontal supports are attached to the support and expandable and contractable in the horizontal direction, and both ends of the horizontal supports are pressed against the corresponding side wall surfaces in the excavation site, thereby moving the support to the side. A clamshell bucket fixed to a wall surface (claim 1).

(2) It is preferable that the lateral overhanging means is slidable in the overhanging direction with respect to the support.

In the present specification including the claims of the utility model registration, the “overhang direction” refers to the horizontal direction in which the lateral overhang means expands and contracts, that is, the length direction of the lateral overhang means (left and right directions in FIG. 1). And

[0014]

[Action]

 [Clamshell bucket of claim 1] The clamshell bucket of claim 1 is used in a state where the support is suspended by a suspension device such as a crane via a wire. That is, the clamshell bucket is lowered while the pair of buckets pivotally attached to the support is opened by the driving means, and the bucket is grounded. Subsequently, the support is fixed to the side wall surface by extending the horizontal overhanging means in the horizontal direction and pressing both ends of the horizontal overhanging means against the corresponding side wall surfaces in the excavation site. In this state, the pair of buckets is closed by the driving means. At that time, the support is fixed to the side wall surface in the excavation site and is prevented from moving upward, so that the bucket will dig deeply into the ground. Therefore, excavation of hard ground is also possible.

Subsequently, the fixing of the support by the lateral overhanging means is released by contracting the lateral overhanging means, the clamshell bucket is lifted, and the excavated soil is discharged to the outside of the excavation place (hole). Lower the bucket further and perform the same excavation work as above. Thereafter, in the same manner, the clamshell bucket is sequentially lowered to perform deep excavation work. Deep excavation is possible as long as the wire that suspends the support reaches.

[Claimshell Bucket of Claim 2] In the clamshell bucket of Claim 2, since the lateral projecting means is slidable in the projecting direction with respect to the support, the clamshell bucket is opened with the bucket open. If the horizontal overhanging means is extended horizontally after being grounded to a desired position in the excavation place, the lateral overhanging means first comes into contact with the corresponding side wall surface in the excavation place, and then the other end. Are pressed in the opposite direction and come into contact with the corresponding side wall surface on the opposite side. For example, in FIG. 1, the right end of the lateral overhanging means extends rightward and abuts the right side wall surface, and then the left end slides leftward and abuts the left side wall surface. In this manner, the lateral overhanging means fixes the support to the corresponding side wall surface by pressing both ends thereof against the corresponding side wall surface in the excavation site. At this time, since the lateral overhanging means is slidable in the overhanging direction with respect to the support, the clamshell bucket itself is overhung until both ends of the lateral overhanging means come into contact with the corresponding side wall surfaces in this manner. It does not move in any direction. In other words, after the clamshell bucket is brought into contact with the desired position in the excavation site and the lateral projecting means is extended horizontally, the clamshell bucket is fixed to the side wall surface at the desired position. become. That is, the clamshell bucket can excavate the desired position in the excavation site.

[0017]

[Embodiment of the invention]

 Next, an embodiment of the present invention will be described with reference to the accompanying drawings (FIGS. 1 and 2). The reference numeral 21 indicates a support for the clamshell bucket. A pair of buckets 25a, 25b are pivotally attached to the support 21 via pivots 23a, 23b so as to be openable and closable, and the buckets 25a, 25b are opened and closed by a driving means 27 such as a hydraulic cylinder attached to the support 21. Make Reference numerals 29a and 29b denote arms connecting the driving means 27 and the buckets 25a and 25b. The buckets 25a and 25b are provided with teeth 31a and 31b, respectively, at the tips. The support 21 is suspended via a wire 33 by a suspension device (not shown) such as a crane.

In the present invention, the support 21 is provided with horizontal overhanging means 43 which expands and contracts in the horizontal direction, and both ends of the horizontal overhanging means 43 are pressed against the corresponding side wall surfaces 51, 53 in the excavation place 49. By doing so, the support 21 is fixed to the side wall surfaces 51 and 53. As shown in FIG. 2, it is desirable that a pair of lateral overhanging means 43 be attached to both sides of the support 21. In the illustrated example, a horizontal mounting table 55 is fixed to the support 21, and a hydraulic cylinder 57 is mounted on the mounting table 55 as the laterally extending means 43, and a base end 59 of the hydraulic cylinder 57 and a piston tip 61 are provided. And the pressing bodies 63 and 65 are pivotally connected to them.

It is desirable that the lateral overhanging means 43 be slidable in the overhanging direction with respect to the support 21. In the illustrated example, the hydraulic cylinder holding plates 67 and 69 are fixed to the mounting table 55, and the hydraulic cylinder 57 as the lateral overhanging means 43 is slidably disposed in the extending direction between the hydraulic cylinder holding plates 67 and 69. Has been established. Reference numeral 71 denotes that the horizontal overhanging means 43 is slidable with respect to the support 21 by keeping the distance between the hydraulic cylinder holding plates 67 and 69 constant, and the upward movement of the horizontal overhanging means 43 is performed. This is a fixing bolt for preventing the above.

The driving means 27 such as a hydraulic cylinder attached to the support body 21 and the horizontal overhanging means 43 extending and contracting in the horizontal direction are controlled from the ground by, for example, a remote control device or a radio control device.

[0021]

[Effect of the invention]

 [Claimshell bucket according to claim 1] The lateral overhanging means attached to the support is extended in the horizontal direction, and both ends of the lateral overhanging means are pressed against the corresponding side wall surfaces in the excavation place, so that the support is moved to the side. Since the excavation is performed with the support fixed to the wall and the upward movement of the support is prevented, the bucket will dig deep into the ground. Therefore, excavation of hard ground is also possible. In addition, the fixing of the support by the lateral overhanging means is released by contracting the lateral overhanging means, the clamshell bucket is lifted, and the excavated soil is discharged out of the excavation place (hole), and then the clamshell bucket is further lowered. Since the excavation work can be performed sequentially, excavation in deep places is possible as long as the wire that suspends the support reaches. Needless to say, as long as the clamshell bucket can be suspended, excavation work can be performed even in a narrow place or on a slope.

[Claimshell bucket of claim 2] In the clamshell bucket of claim 2, since the lateral projecting means is slidable in the projecting direction with respect to the support, the clamshell bucket is placed in the excavation place. If the horizontal overhanging means is extended horizontally after being brought into contact with the desired position at the desired position, the clamshell bucket is fixed to the side wall surface at the desired position. That is, the clamshell bucket can excavate the desired position in the excavation site.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of a use state of a clamshell bucket according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a front view showing an example of a use state of a conventional clamshell bucket.

FIG. 4 is a front view showing another example of the usage state of the clamshell bucket;

[Explanation of symbols]

 1 Support 3a Axis 3b Axis 5a Bucket 5b Bucket 7 Drive 9a Arm 9b Arm 11a Tooth 11b Tooth 13 Wire 15 Arm 21 Support 23a Axis 23b Axis 25a Bucket 25b Bucket 27 Arm 29b 43 Horizontal overhanging means 49 Excavation place 51 Side wall surface 53 Side wall surface 55 Mounting stand 57 Hydraulic cylinder 59 Base end 61 Piston tip 63 Pressing body 65 Pressing body 67 Hydraulic cylinder holding plate 69 Hydraulic cylinder holding plate 71 Fixing bolt

Claims (2)

[Utility model registration claims] 1. A pair of buckets are pivotally attached to a support so as to be openable and closable, and the bucket is opened and closed by driving means attached to the support, and the support is suspended by a suspension device via a wire. In the clamshell bucket as described above, the support is provided with horizontal overhanging means that expands and contracts in the horizontal direction, and both ends of the horizontal overhanging means are pressed against the corresponding side wall surface in the excavation place, so that the support is attached to the side wall surface. A clamshell bucket characterized by being fixed. 2. The apparatus according to claim 1, wherein said lateral projecting means is slidable in a projecting direction with respect to the support.
Clamshell bucket.