JPH0589586U - Lifting drive device for foundation construction machine - Google Patents

Abstract

(57) [Abstract] [Purpose] The rotational driving force can be converted to a linear propulsive force without difficulty, so that the driving force can be saved, and the guide rails of the reader are not worn out, which is economical. Also, a lifting drive device with high practicality is provided. [Structure] A toothed track 11 for chain engagement is provided along the vertical direction of the leader 1, and the guide rail 1 of the leader 1 is provided.
3, a pair of upper and lower sprockets 17 and 18, one of which is a driving side sprocket and the other of which is a driven side sprocket, are provided on a lifting body 14 that can be raised and lowered.
The endless linear chain 22 was hooked on 18 and the endless linear chain 22 was hooked on the toothed track 11.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for vertically moving a lifting body such as an auger machine in a foundation construction machine such as an earth auger.

[0002]

[Prior Art]

 In the conventional earth auger, as shown in FIG. 3, in order to move up and down an elevating body (auger machine) 2 guided by a guide rail (not shown) of the reader 1, a plurality of elevating bodies 2 are installed from the top of the reader 1. Many of them adopted a wire suspension method in which the wire 3 is suspended and the hoisting device is used to move up and down. However, with this method, the lifting body 2 is suspended in the air and sufficient propulsive force is obtained. Therefore, in recent years, there has appeared a type in which the ascending / descending body 2 itself has an elevating / lowering drive function and the propulsive force can be freely controlled. Examples thereof are shown in FIGS. 4 and 5.

FIG. 4 shows a so-called chain drive type lifting / lowering drive device. The chain 4 is arranged along the vertical direction of the leader 1, both ends of which are fixed to the leader 1 and the length of the chain 4 is fixed. Is longer than the distance between both ends for fixing the chain to the leader 1, and the chain 4 and the pair of upper and lower guide sprockets 5 and 6 engaged on the front side of the chain 4 are located between the upper and lower sprockets 5 and 6 and the chain 4 A drive sprocket 7 that engages with this on the back side is provided on the lifting body 2 guided by the guide rails of the reader 1, and the driving sprocket 7 is rotated to raise and lower the lifting body 2. Further, FIG. 5 shows a lifting and lowering drive device called a rack and pinion system, in which a rack 8 is arranged and fixed along the up-and-down direction of the reader 1, and a pinion provided on a lifting body 2 guided by a guide rail 9 of the reader 1. The rack 10 is meshed with the rack 8, and the lift 2 is moved up and down by rotationally driving the pinion 10.

[0004]

[Problems to be solved by the device]

 Of the above-described conventional lifting drive devices, the chain drive system of FIG. 4 is sufficient to convert the rotational force into a linear propulsion force, but the work of mounting the chain 4 on the reader 1 is extremely difficult. There is a drawback that it becomes complicated. On the other hand, in the rack and pinion system of FIG. 5, if the rack 8 is attached to the reader 1 in advance, the assembling work becomes simple, but the rotary motion of the pinion 10 is directly converted into the linear motion, that is, the rotary driving force. Has a disadvantage that the conversion efficiency is poor because it is forcibly converted into a linear propulsive force, and a belt force external force F is generated during the rotational movement of the pinion 10, which causes the guide rail 9 of the reader 1 to be worn out.

In view of the above problems, the present invention makes it possible to easily perform the assembly work, convert the rotational driving force into a linear propulsive force without difficulty, and save the driving force. It is an object of the present invention to provide an up-and-down drive device that is excellent in economy and practicality without changing the wear of the guide rails.

[0006]

[Means for Solving the Problems]

 The elevator drive device of the present invention is provided with a toothed track 11 for chain engagement along the vertical direction of the leader 1, and an elevator body 14 which can be raised and lowered along a guide rail 13 of the leader 1, one of which is a drive side. A sprocket and a pair of upper and lower sprockets 17 having the other side as a driven side sprocket are provided, and the endless chain 22 is hung on both sprockets 17 and 18, and the endless chain 22 is engaged with the toothed track 11. It is characterized by

[0007]

【Example】

 An embodiment of a lifting drive device according to the present invention will be described with reference to FIGS. 1 and 2. Reference numeral 11 denotes a pair of left and right members arranged and fixed along substantially the entire length of the reader 1 in the vertical direction. A tooth-shaped orbit for chain engagement, 12 is an auger machine (elevating body), and is a support body 14 that is vertically guided along a pair of left and right guide rails 13 provided on the reader 1, and this support body 14 is integrated. And an auger driving unit 15 provided in the same manner. Reference numeral 16 is an auger detachably connected to the lower portion of the auger drive unit 15.

The support 14 of the auger machine 12 is provided with a pair of upper and lower sprockets 17, 18, two upper right sprockets 17 and two lower right sprockets 18, and two upper right sprockets 17. , 17 are mounted on a drive shaft 20 rotatably driven by a lifting drive motor 19 at an interval corresponding to the interval between the pair of chain engaging tooth tracks 11, 11, and both sprocket parts 18 on the lower side. , 18 are also mounted on the driven shaft 21 at the same intervals as the upper side sprockets 17, 17. An endless chain 22 is hooked on each of the pair of upper and lower sprockets 17 and 18, and a straight portion of the endless chain 22 is hooked on each tooth-shaped track 11. Engagement holders 23, 23 slidably engaged with the guide rails 13, 13 are provided on the left and right sides of the upper and lower ends of the support body 14, respectively. Reference numeral 24 is a motor of the auger drive unit 15.

According to the lifting drive device having the above-described configuration, when the lifting drive motor 19 is started, the upper side (driving side) sprocket 17 rotates via the drive shaft 20, and the upper side sprocket is rotated. By the rotation of 17, the endless chain 22 runs endlessly between the upper and lower sprockets 17 and 18 while keeping the link 22a in the straight portion thereof engaged with the tooth 11a of the toothed track 11. As a result, a propulsive force that drives the elevating body 14 up and down along the guide rail 13 is generated, and the elevating body 14 can move up and down along the guide rail 13 by this propulsive force. The lifting body 14 moves downward when the sprocket 17 on the drive side rotates in the direction of arrow A in FIG. 1, and moves upward when it rotates in the direction of arrow B. Therefore, by attaching the auger 16 to the auger drive unit 15 of the elevating body 14, it is possible to excavate the ground and to drive ready-made piles using the auger drive unit 15.

In this elevator drive device, the rotational motion of the sprockets 17 and 18 that are rotationally driven by the elevator drive motor 19 is converted into a linear motion through the endless chain 22 that engages with the toothed track 11. The rotational driving force is converted into propulsion force without any difficulty, and the vector external force is not generated on the sprockets 17 and 18 as in the case of the rack and pinion system. Absent. With regard to the endless chain 22, since the distance between the pair of upper and lower sprockets 17 and 18 can be freely set and the link dimensions of ready-made chains are plentiful, the chain 22 can be freely adjusted according to the strength of the toothed track 11. There is a merit that can be designed.

In this embodiment, the auger machine was used as the lifting body, but not limited to the auger machine, a hammer for pile driving or other equipment for foundation work can be used.

[0012]

[Operation and effect of the device]

 According to the field elevator drive device of the present invention, due to the rotation of the drive side sprocket, the endless chain is made endless between the upper and lower sprockets while maintaining the engagement of each link in the straight part with the tooth part of the toothed track. To run. As a result, a propulsive force that drives the lifting body up and down along the guide rail is generated, and this lifting force can drive the lifting body up and down.

As described above, since the rotational movement of the sprocket is converted into the linear movement through the endless chain that engages with the tooth-shaped orbit, the rotational driving force is reasonably and efficiently converted into the propulsive force, and the driving force is converted. The external force of the vector is not generated on this sprocket as in the case of the conventional rack and pinion system, so that the guide rail of the leader is not worn or worn, and it is extremely economical and practical. It can be called a lifting drive.

[Brief description of drawings]

FIG. 1 is a side view of a lift drive device according to an embodiment of the present invention.

FIG. 2 is a front view of the same lifting drive device.

FIG. 3 is a perspective view of a conventional lifting drive device using a wire suspension system.

FIG. 4 is a side view of a main part of a conventional lifting drive apparatus using a chain drive system.

FIG. 5 is a side view of a conventional lifting and lowering drive device using a rack and pinion system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 leader 11 toothed track 12 auger machine (elevating body) 13 guide rail 14 support body 15 auger rotary drive unit 16 auger 17 upper sprocket (drive side sprocket) 18 lower sprocket (driven side sprocket) 19 vertical drive motor 22 Endless chain

Claims (1)

[Scope of utility model registration request] 1. A toothed track for engaging a chain is provided along a vertical direction of a leader, and an elevating body which can be raised and lowered along a guide rail of the leader, one of which is a drive side sprocket and the other of which is a driven sprocket. An elevating drive device for a foundation construction machine in which a pair of upper and lower sprockets are provided, an endless chain is hung on both sprockets, and the endless chain is engaged with the toothed track.