JPH10238262A - Elevating device for auger drive mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevating device with which a frame can simply be attached to a guide rail. SOLUTION: A sheave block 42 to which a suspended sheave 20 is removably attached to a link member 36 rotatably supported by a frame 10 and integrally fixed thereto with a sprocket 38, by means of fulcrum pin so as to be rotatable around the fulcrum pin. A sprocket 50 is integrally fixed to an upper guide gib 14 which is rotatably supported to a frame 10. A chain 58 is wound between the sprockets 38, 50, and is meshed with an idle sprocket 60 which is slidably supported and which is urged by a coil spring 66.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating device for an auger drive mechanism for supporting a frame in which an auger drive mechanism is incorporated so as to be slidable in the longitudinal direction of a guide rail of a reader and elevating the frame via a suspension sheave. About.

[0002]

2. Description of the Related Art Conventionally, a frame incorporating an auger drive mechanism for rotating an auger screw is slidably engaged with a guide rail of a reader through a guide gib.
2. Description of the Related Art A construction machine that excavates by lowering a frame while rotating an auger screw is used.

In such a construction machine, Japanese Unexamined Patent Publication No. 7-20 has been proposed in order to facilitate mounting of a frame on a guide rail.
As disclosed in Japanese Patent Publication No. 8058, the frame is divided into a lower part and an upper part, and a guide gib is attached to each. And the upper frame rotatably supports the hanging sheave,
An auger drive mechanism is mounted on the lower frame.

[0004] First, the upper frame is suspended by two wires of a main wire and an auxiliary wire so that the groove of the guide gib is parallel to the guide rail, and the upper frame is engaged with the guide rail. Next, the lower frame is lifted by the auxiliary wire, and the upper frame and the lower frame are connected by a rotating pin. There is known a configuration in which the upper and lower frames are lifted by a main wire so that a guide gib of the lower frame is engaged with a guide rail.

[0005]

However, in such a conventional device, two sets of wires, a main wire and an auxiliary wire, are required to lift the upper frame and the lower frame, and the auxiliary wire is used for the upper frame. After lifting the lower frame, the lower frame is lifted, so that the auxiliary wire must be changed from the upper frame to the lower frame.

An object of the present invention is to provide an elevating and lowering device of an auger drive mechanism which allows a frame to be more easily mounted on a guide rail.

[0007]

In order to achieve the above object, the present invention takes the following means to solve the problem. That is, a frame incorporating an auger drive mechanism for rotating an auger screw is engaged with a guide rail of a leader via a guide gib to slidably support the guide rail in a longitudinal direction of the guide rail, and the suspension is provided via a suspension sheave. In an elevating device of an auger drive mechanism for elevating the frame, a sprocket is integrally fixed to a link member rotatably supported by the frame, and a sheave block in which the hanging sheave is rotatably supported by the link member. Detachable by a fulcrum pin, and rotatably connected around the fulcrum pin, and also rotatably supports the upper guide gib on the frame, and integrally fixes a sprocket to the guide gib, An elevating device for an auger drive mechanism, wherein a chain is stretched between the two sprockets. Is it.

In addition, the chain may be engaged with an idle sprocket, and the idle sprocket may be biased. Further, a rotation regulating pin may be provided which can be inserted into the frame and the upper guide gib, or the idle sprocket may be slidably supported and biased by a spring.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 4, reference numeral 1 denotes a self-propelled construction machine, and a leader 2 is supported by a stay 4 and a catching fork 6 so as to be able to be turned upside down. Two long guide rails 8 are laid on the front surface of the reader 2 along the longitudinal direction thereof, and have a circular cross section.
Has a pair of upper and lower guide gibs 12, 1
4 are engaged. An auger drive mechanism 16 is incorporated in the frame 10, and the auger drive mechanism 16
, An auger screw 18 is attached, and is configured to rotationally drive the auger screw 18.

The frame 10 is suspended by a wire 24 via a suspension sheave 20 or the like. One end of the wire 24 wound around the suspension sheave 20 is fixed to an upper end of the reader 2 and The other end is bridged between a pair of sheaves 26 and 27 rotatably supported on the upper end of the reader 2.

[0011] Then, it is wound around a winch rotating drum (not shown) provided inside the construction machine 1 via a sheave 28 rotatably supported in the middle of the leader 2 and a sheave 29 provided at the lower end of the leader 2. Then, the frame 10 can be moved up and down by driving the winch.

As shown in FIG. 5, a semicircular groove 3 corresponding to the outer peripheral shape of the guide rail 8 is formed in the upper guide give 14.
0, 32 are formed. The guide rails 8 are inserted into the grooves 30 and 32, and the guide rails 8 can be sandwiched from both sides by the upper guide gibs 14.

Similarly, a groove (not shown) is formed in the lower guide gib 12, and the guide rail 8 is inserted into this groove so that the guide rail 8 can be clamped from both sides. Are configured so as to be slidably supported in the longitudinal direction.

As shown in FIGS. 1 to 3, a first rotation shaft 34 orthogonal to the rotation center of the auger screw 18 is rotatably inserted into the frame 10. A link member 36 is integrally fixed to the first rotating shaft 34, and a sprocket 38 is connected to the first rotating shaft 3 by key connection or the like.
The link member 36 is mounted so as to rotate integrally therewith, and a through hole 40 is formed at one end of the link member 36.

On the other hand, the hanging sheave 20 is a sheave block 4.
2 is rotatably supported via a support shaft 43, and the sheave block 42 is also formed with a through hole 44. A fulcrum pin 46 that can be inserted into the through hole 40 of the link member 36 and the through hole 44 of the sheave block 42 is provided.
The link member 36 and the sheave block 42 are made detachable by inserting and pulling out the fulcrum pin 46, and are configured to be rotatably connected around the fulcrum pin 46.

The upper guide gib 14 is rotatably supported by the frame 10 via a second rotating shaft 48 parallel to the first rotating shaft 34. The upper guide gib 14 and the second rotating shaft 48 are integrally fixed, and the second rotating shaft 4
8, a sprocket 50 is mounted so as to rotate integrally with the second rotating shaft 48 by key connection or the like. As shown in FIG. 3, when the grooves 30 and 32 of the upper guide gib 14 are engaged with the guide rails 8, they can be inserted into the insertion hole 52 formed in the frame 10 and the insertion hole 54 formed in the upper guide gib 14. The rotation control pin 56 is provided.

A chain 58 is stretched between the sprockets 38 and 50. Further, an idle sprocket 60 is meshed with the chain 58, and the idle sprocket 60 is rotatably supported by a tip of a sliding shaft 62. The sliding shaft 62 is slidably supported by the frame 10, and a coil disposed between an adjusting nut 63 screwed into the rear end of the sliding shaft 62 and a protrusion 64 formed on the frame 10. It is biased by a spring 66.

As shown in FIG. 6, the direction connecting the center of the first rotating shaft 34 and the fulcrum pin 46 without the idle sprocket 60 is defined by the grooves 30, 32 of the upper guide gib 14.
The length of the chain 58 is set so as to be parallel to the direction. Further, in this state, when the sheave block 42 and the link member 36 are connected by the fulcrum pins 46 and the frame 10 is lifted, a rotational force around the second rotary shaft 48 is exerted by the weight of the upper guide gib 14. Due to this acting force, a line connecting the center between the first rotation shaft 34 and the fulcrum pin 46 is inclined without being vertical. The grooves 30 and 32 of the upper guide gib are inclined with respect to the guide rail 8 by the inclination angle θ.

The idle sprocket 60 is connected to the chain 58
, And an urging force is applied to the idle sprocket 60 by the coil spring 66. As shown in FIG. 2, the urging force of the coil spring 66 connects the link member 36 to the sheave block 42 via the fulcrum pin 46, and the link member 36, the first rotating shaft 34, and the sprocket 38 rotate freely. When it is not possible, tension is applied to the chain 58 via the idle sprocket 60 and the sprocket 5
0, the second rotating shaft 48, and the upper guide gib 14 are configured to have such strength as to be able to rotate.

Further, the urging force of the coil spring 66 is adjusted by the adjusting nut 63 so that the direction of the grooves 30 and 32 becomes parallel to the direction of the guide rail 8 by the rotation of the upper guide gib 14. Idle sprocket 60
May be arranged so that the tension of the chain 58 is applied in a direction in which the grooves 30 and 32 of the upper guide gib 14 and the guide rail 8 are parallel to each other.

Even if the idle sprocket 60 is not provided, the direction of the grooves 30 and 32 of the upper guide gib 14 and the guide rail 8 need only be parallel to each other, so that no rotational force acts on the second rotary shaft 48. Alternatively, a balance weight or the like may be attached to the upper guide give 14. The length of the chain 58 may be adjusted so that the direction of the grooves 30 and 32 of the upper guide gib 14 and the guide rail 8 are parallel.

Next, the operation of the elevating device of the auger drive mechanism according to the present embodiment will be described. First, as shown in FIG. 1, the frame 10 is placed horizontally on the ground with the upper and lower guide gibs 12, 14 down. At that time, the upper guide give 14 has the grooves 30 and 32 oriented vertically,
It is placed so that it is rotated 90 degrees. At this time,
The link member 36 is rotated about the first rotation shaft 34 together with the sprocket 38 by the urging force of the coil spring 66.

Then, the wire 24 is paid out by operating a winch (not shown), and the sheave block 42 is lowered, so that the through hole 44 of the sheave block 42 and the link member 36
The fulcrum pin 46 is inserted in such a manner that the fulcrum pin 46 is aligned with the through hole 40.
Thereby, the sheave block 42 and the link member 36 are connected.

Subsequently, when the wire 24 is wound up by operating the winch, first, the sheave block 42 around the fulcrum pin 46 and the link member 36 rotate, and the first rotary shaft 34 rotates together with the link member 36. I do. At that time, the sprocket 38 also rotates and the chain 58 is pulled,
The idle sprocket 60 is moved against the urging force of the coil spring 66. As a result, a tension corresponding to the urging force of the coil spring 58 is applied to the chain 58.

Further, when the wire 24 is wound up, as shown in FIG. 2, the sheave block 42, the fulcrum pin 46,
Through the link member 36 and the first rotation shaft 34, the frame 1
0 is lifted, and the upper guide give 14 moves off the ground. At this time, one end of the lower guide give 12 is lifted in a state of being in contact with the ground.

The support shaft 43 and the fulcrum pin 4 are attached to the link member 36 by the weight of the frame 10 and the auger drive mechanism 16.
6. A rotational force around the first rotation shaft 34 and the fulcrum pin 46 acts so that the first rotation shaft 34 is aligned on a straight line. In addition, the link member 36 is formed by the weight of the upper guide give 14.
, A rotational force acts in the opposite direction.

Since the weight of the frame 10 and the auger driving mechanism 16 is very large, the link member 36 is arranged in a direction in which the support shaft 43, the fulcrum pin 46, and the first rotary shaft 34 are aligned.
Are rotated, and are balanced in a “<” shape by the rotational force of the upper guide gib 14 due to its own weight, as shown in FIG.

The idle sprocket 60 applies tension to the chain 58 by the urging force of the coil spring 66, and
As shown in (2), the upper guide gib 14 is further rotated about the second rotation shaft 48 via the sprocket 50 and the second rotation shaft 48. Therefore, the groove 3 of the upper guide give 14
0, 32 and the guide rail 8 become parallel.

The wire 24 is wound up so that the grooves 30 and 32 of the upper guide gib 14 are aligned with the guide rail 8, and
The guide rails 8 can be easily inserted into 0, 32. Then, the wire 24 is further wound up to raise the upper guide gib 14 along the guide rail 8. The upper guide gib 14 rotates about the second rotation shaft 48, and the frame 10 is also lifted.
Leaves the ground.

The frame 10 is suspended by a wire 24. At this time, the groove of the lower guide gib 12 is parallel to the guide rail 8, so that when the wire 24 is wound up, the guide rail 8 is easily inserted into the groove of the lower guide gib 12. Can be inserted. After the upper guide gib 14 and the lower guide gib 12 are engaged with the guide rail 8, as shown in FIG.
The rotation restricting pins 56 are inserted into the pins 2 and 54. This allows
The rotation of the upper guide gib 14 around the second rotation shaft 48 is regulated.

The engagement of the two guide gibs 12, 14 with the guide rail 8 causes the support shaft 43, the fulcrum pin 46, and the first rotating shaft 34 to be aligned on a vertical line, and the grooves 30,
32 are parallel. Accordingly, the chain 58 is in a state of being stretched horizontally, and the idle sprocket 60 is pulled up by the action force from the chain 58 against the urging force of the coil spring 66.

As described above, the present invention is not limited to such an embodiment, and can be implemented in various modes without departing from the gist of the present invention.

[0033]

As described above in detail, in the elevating device of the auger drive mechanism of the present invention, the upper guide gib is rotated through the two sprockets and the chain by the rotation of the link member, so that the auxiliary guide and the like are not required. Thus, there is an effect that the groove of the upper guide gib and the guide rail can be easily engaged. When the chain is urged by the idle sprocket, it can be easily adjusted so that the groove of the upper guide gib and the guide rail are kept parallel. Further, by using the rotation regulating pin, the upper guide gib can be easily fixed after engaging with the guide rail. By urging the idle sprocket with a spring,
The chain can be biased with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an elevating device of an auger drive mechanism as one embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a state in which a frame of the present embodiment is lifted and an upper guide gib is engaged with a guide rail.

FIG. 3 is a schematic configuration diagram of a state where upper and lower guide gibs of the present embodiment are engaged with guide rails.

FIG. 4 is a side view of a construction machine using the elevating device of the auger drive mechanism of the embodiment.

FIG. 5 is an enlarged sectional view of an upper guide give of the embodiment.

FIG. 6 is an explanatory diagram in a case where an idle sprocket is not provided in the elevating device of the auger drive mechanism of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Construction machine 2 ... Leader 8 ... Guide rail 10 ... Frame 12 ... Lower guide gib 14 ... Upper guide gib 16 ... Auger drive mechanism 18 ... Auger screw 20 ... Hanging sheave 24 ... Wire 30, 32 ... Groove 34 ... 1st rotating shaft 36 ... Link members 38,50 ... Sprocket 42 ... Sheep block 46 ... Support pin 48 ... Second rotating shaft 56 ... Rotation regulating pin 58 ... Chain 60 ... Idle sprocket 66 ... Coil spring

Claims (4)

[Claims] 1. A frame incorporating an auger drive mechanism for rotating an auger screw is engaged with a guide rail of a reader via a guide gib to support the frame in a manner slidable in the longitudinal direction of the guide rail, and to suspend the sheave. An elevating device of an auger drive mechanism for elevating the frame via a sprocket, wherein a sprocket is integrally fixed to a link member rotatably supported by the frame, and the suspension sheave is rotatably supported by the link member. A sheave block is detachably attached by a fulcrum pin, and rotatably connected around the fulcrum pin.Also, the upper guide gib is rotatably supported on the frame, and a sprocket is integrally fixed to the guide gib. An auger drive mechanism characterized in that a chain is stretched between the two sprockets. lift device. 2. The elevating and lowering device for an auger drive mechanism according to claim 1, wherein an idle sprocket is meshed with said chain and said idle sprocket is urged. 3. The auger lifting and lowering device for an auger drive mechanism according to claim 1, further comprising a rotation regulating pin that can be inserted into said frame and said upper guide gib. 4. The elevating and lowering device for an auger drive mechanism according to claim 1, wherein said idle sprocket is slidably supported and biased by a spring.