JP2747213B2 - Auger drive mechanism lifting device - Google Patents

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. It is 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 via a guide gib. In order to facilitate the mounting of the frame on the guide rails, there is known a structure in which a guide gib is provided to be detachable from the frame, as disclosed in Japanese Utility Model Publication No. 56-51115.

[0003] This eliminates the need for the operator to carry the heavy guide gib to the mounting position, but requires the operator to work at a high place in order to fix the guide gib with bolts. Also, since the suspension sheave is rotatably supported on the frame on the extension of the auger screw, when the frame is engaged with the guide rail via the guide gib, if the frame is suspended via the suspension sheave, the auger drive is performed. Since the center of gravity of the frame in which the mechanism is incorporated is not on the extension of the auger screw, there has been a problem that the mounting work is not easy because the frame is inclined in the front-rear direction.

Therefore, as disclosed in Japanese Utility Model Publication No. 56-55352, a sheave block for suspending a frame is swingably attached to a position where the frame can be suspended while maintaining a vertical posture, and the sheave block is attached to the suspension block. The holding position is moved to a position substantially coincident with the extension of the auger screw connected to the auger drive mechanism incorporated in the frame so that it can be fixed by the lock pin, so that the mounting position of the frame at the time of mounting work on the reader There is known a device which can be suspended in a vertical posture, and can be suspended on an extension of the auger screw after the auger screw is connected.

[0005]

However, in the Japanese Utility Model Publication No. 56-55352, when the guide gib is engaged with the guide rail, the frame is suspended while maintaining the vertical posture. And the guide give are separated by a predetermined distance L. That is, when the frame is hung on the extension of the auger screw,
The extension line of the auger screw and the guide rail are configured to be parallel. In addition, the position of the center of gravity of the frame in which the auger drive mechanism is incorporated is generally between the erect guide rail and the extension of the auger screw, and in a state where the frame is suspended while maintaining the vertical posture,
The guide give and the guide rail are separated by a predetermined distance L. Therefore, in order to engage the guide gib with the guide rail, the operator must push the heavy frame to approach the guide rail, and engage the guide rail and the guide gib. Further, there is a problem that the bolt tightening work for mounting the guide gib is a work at a high place, and the mounting is not easy.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an elevating and lowering device of an auger drive mechanism capable of easily engaging a frame with a guide rail.

[0007]

In order to achieve the above object, the present invention has the following structure as means for solving the problems. That is, 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 slidably support the guide rail in a longitudinal direction of the guide rail, and erects the guide rail, In an elevating device of an auger drive mechanism for raising and lowering the frame via a suspension sheave rotatably supported by the frame, the frame includes an upper frame rotatably supporting the suspension sheave on an extension of the auger screw. The upper frame and a lower frame incorporating the auger drive mechanism separately, and a guide gib is arranged on each of the upper and lower frames, and the upper frame and the lower frame are parallel to a rotation center of the suspension sheave. Detachable and removable around the center pin And the upper frame is engaged with the guide rail via the guide gib, the upper frame is suspended via the suspension sheave, and the lower frame is attached to the upper frame by the rotation center pin. The rotation center pin is arranged at a position where the guide gib of the lower frame is engaged with the guide rail when it is swung by engaging with the auger drive mechanism. is there.

When the guide gib of the lower frame is brought into a position for engaging with the guide rail by swinging the lower frame around the rotation center pin,
A lock pin for restricting rotation of the lower frame around the rotation center pin may be provided.

Further, the lock pin is slidably supported by the lower frame in a direction parallel to the rotation center pin, and is urged toward the upper frame by a spring, so that the guide gib of the lower frame is moved. An insertion hole into which the lock pin fits may be formed in the upper frame when it comes to a position where it engages with the guide rail.

[0010]

In the elevating device of the auger drive mechanism having the above structure, the upper frame is engaged with the guide rail via the guide gib and is suspended via the suspension sheave. And
A rotation center pin detachably connects the upper frame and the lower frame and swingably engages around the rotation center pin. When the upper frame is raised, the lower frame swings around the rotation center pin, so that the guide give of the lower frame is brought into a position where it is engaged with the guide rail. In this state, the guide give of the lower frame is engaged with the guide rail.

When the lock pin is used, when the guide gib of the lower frame comes to a position where it engages with the guide rail, the lock pin regulates the rotation of the lower frame around the rotation center pin, and The frame and the lower frame are firmly connected. Further, when the lock pin is biased toward the upper frame by a spring, when the guide gib of the lower frame comes to a position where it engages with the guide rail, the lock pin is inserted into the insertion hole of the upper frame by the biasing force of the spring. The upper frame and the lower frame are automatically connected by restricting the rotation of the lower frame around the rotation center pin.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of a construction machine using an elevating device of an auger drive mechanism according to one embodiment of the present invention. 1 is a self-propelled construction machine for an earth auger, and a leader 2 is a stay 4
And the catching hawk 6 so as to be able to be turned upside down. Two elongated guide rails 8 and 10 are laid on the front surface of the reader 2 along its longitudinal direction. The guide rails 8 and 10 having a circular cross section are provided with four guide gibs 14 having four frames 12. 17 are engaged.

An auger driving mechanism 18 is incorporated in the frame 12, and an auger screw 20 is attached to the auger driving mechanism 18 so as to rotate the auger screw 20. Also, frame 1
2, a suspension sheave 22 is rotatably supported,
One end of the wire 24 wound around the hanging sheave 22 is
The frame 12 is suspended by a pair of sheaves 26 and 28 rotatably supported on the upper end of the reader 2 while being fixed to the upper end of the leader 2, and the frame 12 is suspended via the suspension sheave 22. I have.

Then, the reel is wound around a winch rotating drum (not shown) provided inside the construction machine 1 via a sheave 30 rotatably supported in the middle of the leader 2 and a sheave 32 provided at the lower end of the leader 2. Then, the frame 12 can be raised and lowered by driving the winch.

As shown in FIGS. 2 to 7, the frame 12 includes an upper frame 34, and a lower frame 36 separate from the upper frame 34. Four suspension sheaves 22 are accommodated between the side plates 38 and 40, and the four suspension sheaves 22 are rotatably supported by support shafts 42 supported by the side plates 38 and 40. This support shaft 42 is
It is located on an extension of 0.

4 and FIG.
As shown in FIG. 2, a pair of the guide gibs 14, 16 are fixed by a plurality of bolts 44, 46, and both guide gibs 14, 16 have semicircular grooves corresponding to the outer peripheral shape of the guide rails 8, 10. 48 and 50 are formed. Groove 4
The guide rails 8 and 10 are inserted into the guide rails 8 and 50, and the guide rails 8 and 10 are sandwiched between the guide gibs 14 and 16 so that the upper frame 34 can be slidably supported in the longitudinal direction of the guide rails 8 and 10. Is configured.

The insides of both side plates 38 and 40 are connected by a connecting member 52, and a through hole 54 is formed in both side plates 38 and 40 and the connecting member 52 in parallel with the support shaft 42. On the outside of both side plates 38, 40, a projection 56,
58 are formed around the through hole 54, and the protrusion 5
One end of each of the ring members 60 and 62 is formed so as to be gradually higher from above the side plates 38 and 40, and the other end is formed substantially flat and fixed to the side plates 38 and 40.
Is linked to Insert holes 64, 66 are formed at the centers of the ring members 60, 62.

On the other hand, the lower frame 36 incorporates the auger drive mechanism 18 having an electric motor 68, a planetary reduction gear 70, and a final reduction gear 72.
The auger screw 20 can be connected to the joint 74 connected to. Since the auger drive mechanism 18 is incorporated in the lower frame 36, its weight is heavy, and in this embodiment, it is about 5 to 6 tons.

2 and FIG.
As shown in FIG. 3, a pair of the guide gibs 15, 17 are fixed by a plurality of bolts 76, 78, and both guide gibs 15, 17 have a semicircular groove corresponding to the outer peripheral shape of the guide rails 8, 10. 90 and 92 are formed. Groove 9
The guide rails 8 and 10 are inserted into the guide rails 8 and 10, and the guide rails 8 and 10 are sandwiched between the guide gibs 15 and 17 so that the lower frame 36 can be slidably supported in the longitudinal direction of the guide rails 8 and 10. Is configured.

The upper part of the lower frame 36 is shown in FIGS.
As shown in FIG. 3, support portions 94 and 96 are formed facing each other at intervals that can accommodate the upper frame 34, and both support portions 9
4, 96 are coaxially formed with through holes 98, 100. The through holes 98 and 100 are provided in the upper frame 34.
The upper frame 34 is accommodated between the support portions 94 and 96, and the through holes 54, 98, 100
It is formed so that the rotation center pin 102 can be fitted therein. A lower frame 36 is swingably fitted around the rotation center pin 102.

The positions of the through holes 54, 98, 100 and the rotation center pin 102 are determined by the guide rails 8, 1 on which the two guide gibs 14, 16 of the upper frame 34 are erected.
In the state where the lower frame 36 is engaged with the lower frame 36 and the auger drive mechanism 18 is pivoted around the rotation center pin 102, the upper frame 34 is lifted through the suspension sheave 22. Guide give 15, 17
Are engaged with the guide rails 8 and 10, that is, the grooves 48 and 50 of the guide gibs 14 and 16 of the upper frame 34 and the grooves 90 and 9 of the guide gibs 15 and 17 of the lower frame 36.
2 are arranged coaxially with the guide rails 8 and 10.

FIGS. 8 and 9 show the supporting portions 94 and 96 respectively.
As shown in FIG.
The lock pins 108 and 110 are slidably fitted in the sliding holes 104 and 106, respectively. The sliding holes 104 and 106 have the same diameter as the insertion holes 64 and 66 of the upper frame 34 and are engaged with both guide gibs 14 and 16 of the upper frame 34 with the guide rails 8 and 10 erected. When the upper frame 34 is lifted via the suspension sheave 22 and the lower frame 36 in which the auger drive mechanism 18 is incorporated swings around the rotation center pin 102, the guide give 1 of the lower frame 36
When the positions 5 and 17 are engaged with the guide rails 8 and 10, the sliding holes 104 and 106 and the insertion holes 64 and 66 are arranged coaxially.

The lock pins 108 and 110 are provided with bottomed holes 112 and 114 in the axial direction thereof.
Springs 116 and 118 are housed in 12, 114, respectively. The lock pins 108 and 110 have bottomed holes 11.
2 and 114, grooves 120 and 122 are formed. In the grooves 120 and 122, mounting members 124 and 126 are inserted, and the mounting members 124 and 126 are supported by the support portion 9.
The lock pins 108 and 110 are urged toward the upper frame 34 by the springs 116 and 118. Further, the lock pins 108, 1
The ten flanges 108a, 110a are the sliding holes 104, 106
The lock pins 108 and 110 hit the edge of the
It is regulated to get out of 4,106.

On the end faces of the lock pins 108 and 110, brackets 132 and 13 having elongated holes 128 and 130 are formed.
4 are fixed, and bearings 136 and 138 are movably inserted into the elongated holes 128 and 130. The bearings 136 and 138 are engaged with the levers 144 and 146 via the pins 140 and 142, respectively.
46 is a bracket 14 fixed to the support portions 94 and 96.
8, 150 are swingably supported via pins 156, 158 fitted to bearings 152, 154 mounted on the motor.

One end of each of the wires 164 and 166 is locked to the pins 160 and 162 fitted to one end of each of the levers 144 and 146, and the wires 164 and 166 are attached to the brackets fixed to the support portions 94 and 96. It is hung on pulleys 172 and 174 rotatably supported by 168 and 170.

Further, the wires 164 and 166 are connected to a plurality of pulleys 176 rotatably supported in the lower frame 36.
Through 181 to the release levers 184 and 186 provided in the lower frame 36. The release levers 184 and 186 can be opened and closed by opening a cover 190 provided on the lower frame 36 so as to be openable and closable.

The leg members 1 are provided on both sides of the lower frame 36.
92, 194 are attached, and the lower frame 36
Is supported by the leg members 192 and 194 and the guide gibs 15 and 17 so that the robot can be placed on the ground. Next, the operation of the elevating device of the auger drive mechanism of the present embodiment will be described.

First, as shown in FIGS. 10 and 11, the guide rails 8 and 10 of the reader 2 are set up vertically, and the wire 24 is hung on the suspension sheave 22 of the upper frame 34 to which the guide gibs 14 and 16 are attached. And a winch wire 196 (not shown) provided inside the construction machine 1 and separate from the auger suspension is hung near the guide gibs 14 and 16 of the upper frame 34 at a position where the upper frame 34 can be lifted substantially horizontally. (FIG. 10 (a)).

In general, there is a gap between the lower ends of the guide rails 8 and 10 and the ground, and the upper frame 34 is positioned so that the grooves 48 and 50 of the guide gibs 14 and 16 are located directly below the guide rails 8 and 10. Can be placed. Then, the upper frame 34 is lifted while aligning the grooves 48 and 50 with the guide rails 8 and 10, and the guide rails 8 and 10 are mounted in the grooves 48 and 50 (FIG. 10B).

Next, a winch wire 196 (not shown) is hung on the distal end of the lower frame 36, and the distal end of the lower frame 36 is lifted by an auxiliary crane. 34, and both through holes 98, 10 of the lower frame 36.
0 and the through hole 54 of the upper frame 34 are aligned. Then, the rotation center pin 102 is inserted into the through holes 54, 98, and 100, and the upper frame 34 and the lower frame 36 are engaged (FIG. 10C).

Subsequently, while the construction machine 1 is advanced, the wire 24 is wound up to raise the upper frame 34 along the guide rails 8 and 10 (FIG. 11A). Accordingly, the lower frame 36 swings around the rotation center pin 102, and the lower frame 36 relatively approaches the reader 2 side. When swinging around the rotation center pin 102, the protrusion 5
Lock pins 108, 110 ride on 6, 58 and lock pins 108, 1 against the urging force of springs 116, 118.
10 slides in the sliding holes 104 and 106 in a direction away from the upper frame 34.

Further, when the upper frame 34 is lifted, the lower frame 36 is separated from the ground and is suspended via the rotation center pin 102. At this time, the guide gibs 15, 17 of the lower frame 36 are
The grooves 90 and 92 of the guide gibs 15 and 17 are located directly below the guide rails 8 and 10, and the lock pins 108 and 110 are inserted into the insertion holes 64 and 66 by the urging forces of the springs 116 and 118. To restrict the swinging of the lower frame 36 around the rotation center pin 102, thereby firmly connecting the upper frame 34 and the lower frame 36 (FIG. 11 (b)).

The guide rails 8, 10 are engaged with the grooves 90, 92 by winding up and raising the wire 24 with the grooves 90, 92 of the guide gibs 15, 17 aligned with the guide rails 8, 10. FIG. 11 (c). When the cover 190 is opened and the release levers 184 and 186 are pulled, the wires 164 and 166 are pulled, and the levers 144 and 146 swing around the pins 156 and 158. By this swing, via the pins 140 and 142, the bearings 136 and 138, and the brackets 132 and 134,
The lock pins 108 and 110 are pulled out of the insertion holes 64 and 66 against the urging forces of the springs 116 and 118, and the regulation of the swing of the lower frame 36 around the rotation center pin 102 is released. Therefore, the upper frame 34 and the lower frame 36 are connected to the guide rails 8 and 10 in a reverse order to the order described above.
Can be removed from.

As described above, first, the lightweight upper frame 34
Only the guide rails 8,
10, it can be easily engaged. Then, the upper frame 3 is rotated by the rotation center pin 102.
When the lower frame 36 is engaged with the lower frame 36 and raised via the suspension sheave 22, the lower frame 36 swings around the rotation center pin 102, and the grooves 90, 92 of the guide gibs 15, 17 of the lower frame 36. Comes to a position where it engages with the guide rails 8, 10.

Thereafter, when further raised, the grooves 90, 92
The guide rails 8 and 10 are engaged with the guide rails 8 and 10, so that the heavy lower frame 36 is pushed to push the grooves 90 and 92 and the guide rails 8 and 10.
The frame 12 can be easily mounted on the reader 2 without having to adjust the position.

The clearance between the guide rails 8 and 10 and the ground is small due to the shape of the ground and the like.
If the guide gibs 15 and 17 do not enter during that time, the lift is lifted with both or one of the guide gibs 15 and 17 removed, and then the guide gibs 15 and 17 are bolted.
Fix with 6,78. Even in this case, the grooves 90, 92
Since the guide rails 8 and 10 are at the positions where the guide rails 8 and 10 are engaged with each other, the lower frame 36 is not pushed and the bolts can be tightened at the lower end of the reader 2 close to the ground. Can be easily fixed.

The upper frame 34 and the lower frame 36 are connected by the rotation center pin 102 without using the lock pins 108 and 110.
By restricting the swing of the lower frame 36 about the rotation center pin 102 by the use of 10, the upper frame 34 and the lower frame 36 can be firmly connected. Moreover, the connection can be easily and firmly made only by inserting the lock pins 108 and 110.

Further, the lock pins 108 and 110 are
The guide rails 8, 1 are inserted into the grooves 90, 92 by being urged by the holes 16, 118 and fitted into the insertion holes 64, 66.
The upper frame 34 and the lower frame 36 are automatically and firmly connected to each other when the 0 is at the engagement position.

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

[0040]

As described above in detail, in the elevating device of the auger drive mechanism of the present invention, first, the upper frame is engaged with the guide rail via the guide gib, and then the upper frame and the lower frame are rotated by the rotation center pin. When the lower frame swings around the rotation center pin and the guide gib of the lower frame comes to the position where it engages with the guide rail, push the heavy lower frame. There is an effect that the frame can be easily engaged with the leader without any work and without working at a high place.

Further, by restricting the swing of the lower frame around the rotation center pin by the lock pin, the upper frame and the lower frame can be firmly connected. Further, the lock pin is urged by a spring. The upper frame and the lower frame are automatically connected to each other when the guide gib comes to a position where the guide gib is engaged with the guide rail.

[Brief description of the drawings]

FIG. 1 is a front view of a construction machine using an elevating device of an auger drive mechanism as one embodiment of the present invention.

FIG. 2 is an enlarged front view of a frame in which the auger drive mechanism of the present embodiment is incorporated.

FIG. 3 is an enlarged bottom view of a frame in which the auger drive mechanism of the present embodiment is incorporated.

FIG. 4 is an enlarged front view of the upper frame of the embodiment.

FIG. 5 is an enlarged plan view of the upper frame of the present embodiment.

FIG. 6 is an enlarged front view of the upper part of the lower frame of the present embodiment.

FIG. 7 is an enlarged side view of the upper part of the lower frame of the present embodiment.

FIG. 8 is an enlarged front view of a mechanism for releasing the regulation by the lock pin provided on the lower frame of the embodiment.

FIG. 9 is a sectional view taken along the line AA in FIG.

FIG. 10 is an explanatory diagram illustrating a first half of a procedure of engaging an upper frame and a lower frame of the present embodiment with a guide rail.

FIG. 11 is an explanatory view of the latter half of the procedure of engaging the upper frame and the lower frame with the guide rail according to the present embodiment.

[Explanation of symbols]

1. Construction machine 2. Leader
8, 10: Guide rail 12: Frame 14-17: Guide gib 18: Auger drive mechanism 20: Auger screw 22: Suspended sheave 34: Upper frame 3
6 Lower frame 48, 50, 90, 92 Groove 102 Rotation center pin 108, 110 Lock pin 116, 118 Spring

Claims (3)

(57) [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 slidably support the guide rail in a longitudinal direction of the guide rail. And an elevating device of an auger drive mechanism for elevating the frame via a suspension sheave rotatably supported by the frame, wherein the frame rotatably supports the suspension sheave on an extension of the auger screw. An upper frame, and a lower frame incorporating the auger drive mechanism separately from the upper frame, and a guide gib disposed on each of the upper and lower frames; rotating the upper frame and the lower frame with the suspension sheave; Detachable with a rotation center pin parallel to the center,
And swingably engaged around the rotation center pin, and the upper frame is engaged with the guide rail through the guide gib, and the upper frame is suspended through the suspension sheave. When the lower frame is engaged with the upper frame by the rotation center pin and swung, the rotation center pin is arranged at a position where the guide gib of the lower frame engages with the guide rail. Lifting device for the auger drive mechanism. 2. When the guide gib of the lower frame is brought into a position to engage with the guide rail by the swing of the lower frame around the rotation center pin, the lower frame rotates around the rotation center pin. The lifting device for an auger drive mechanism according to claim 1, further comprising a lock pin for restricting rotation. 3. The lock pin is slidably supported by the lower frame in a direction parallel to the rotation center pin, and is urged toward the upper frame by a spring. The lifting device for an auger drive mechanism according to claim 2, wherein an insertion hole into which the lock pin is fitted is formed in the upper frame when the lock pin comes into a position to be engaged with the guide rail.