JPH07110383B2 - Molding device for auger blade - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an auger blade forming apparatus for forming an auger for underground excavation, and more specifically, an annular original plate as a material for forming an auger blade. Is attached at a predetermined angle of inclination with respect to the stretching direction, causing eccentricity of the spindles of the first and second mounting plates supporting the annular original plate with pulling, and processing by this eccentricity. The present invention relates to an auger blade forming apparatus capable of forming a uniform spiral shape by causing the annular original plate itself to be twisted inward and uniformly forming an inner hole of the annular original plate in contact with the outer periphery of the auger shaft.

(Prior Art) Conventionally, an auger blade forming machine for producing an auger for underground excavation has been provided on the market.

First, as shown in Fig. 9, this product has a notch at one place.
A metal annular plate 41 containing 40 is formed in advance.The construction of the machine is such that one side of the cut 40 of the annular plate 41 is grasped from above and below and the other side is grasped from above and below. A gripping member,
The reciprocating means for spiralizing the annular plate 41 by changing the relative positions of both gripping members is provided. (Refer to Japanese Utility Model Laid-Open No. 61-185522) (Problems to be solved by the invention) The above-described molding machine for the blade of the auger is directed in the straight direction with respect to the surface of the annular plate 41 held by the grip member. Due to the pulling, the spirally shaped blade 42 is simply in the state of being expanded in contrast from the cut 40, as shown in FIG. 10, so that it is centered as shown in FIG. Hole 43
Attached to the auger shaft 44, the rising surface 42 of the blade 42
The mounting angle formed by a and the axis of the auger shaft 44, that is, the angle indicated by symbol a in FIG.
It does not correspond to 90 °. Therefore, even if the jaw gap in the gripping member, the chin depression angle, and the depression angle are provided, the edge angle of the blade 42 is sufficiently corrected to be 90 ° as described above. However, as shown in the figure, when the end edges of the butted blades 42 still disagree with each other, or when the central hole 43 becomes an elliptical shape and is inserted into the auger shaft 44, This creates a partial gap, which makes welding work extremely troublesome and reduces work efficiency.

Also, if the angle of the above-mentioned code a is not attached to an accurate 90 °, in excavation work when it is inserted into the steel pipe,
Uneven soil discharge occurs and the excavated soil cannot be discharged smoothly and promptly.

There were various problems such as.

The present invention has been made in order to solve the above-mentioned problems, and by attaching an annular original plate, which is a material for forming an auger blade, at a predetermined inclination angle with respect to its stretching direction, The eccentricity of the spindles of the first and second mounting plates supporting the annular original plate is caused, and during the machining due to this eccentricity, the annular original plate itself is twisted inward to form a uniform spiral shape, An object of the present invention is to provide a molding device for an auger blade, which can be molded so that its inner hole uniformly contacts the outer periphery of the auger shaft.

(Means for Solving the Problem) Means of the present invention for achieving the above-mentioned object include (1) a base, a movable body that moves forward and backward in parallel to the base by an operating means, and the base. A first mounting plate that is rotatably supported by a first support shaft that is tilted at a predetermined angle to the second support, and a second mounting plate that is mounted on the movable body so that the first support shaft and the tilt angle thereof are substantially the same. For an auger blade provided with a second mounting plate rotatably supported by a support shaft, and a fixing means provided on one side of the first and second mounting plates to clamp the vicinity of the cut in the annular original plate. In the configuration of the forming device, and (2) the configuration of the forming device for the auger blade in which the operating means for giving the advancing and retracting motions are linked to the base and the movable body.

(Operation) The present invention configured as described above has the following operations.

The movable body is moved by the operating means, and the second mounting plate supported by the movable body is brought close to the first mounting plate supported by the base.

Then, the cut portions of the annular original plate are held by the fixing means provided on the first and second mounting plates, respectively.

In this state, when the movable body is moved by operating the operating means and the second mounting plate of the movable body is separated from the first mounting plate by a predetermined amount, the annular original plate is expanded in the axial direction from the cut portion. As shown in FIG. 2, at this time, an eccentricity L is generated in the axes of the first support shaft projecting from the base and the second support shaft projecting from the movable body. , The spiral auger blades generate inward twisting force.

Since the first and second attachment plates are rotatably attached to the first and second support shafts, the auger blade is accurately formed by swiveling smoothly with the twisting force of the auger blade. It

The blade after molding is removed by releasing the respective fixing means.

It is also possible to form a spiral shape by simultaneously pulling the annular original plate symmetrically at the same time by linking the operating means for individually moving the movable body and the base.

(Example) Next, an example of an auger blade molding apparatus according to the present invention will be described with reference to the drawings.

The apparatus of the embodiment of the present invention has an auger 1 as shown in FIG.
The auger blade 2 in 1 is formed into a spiral shape by 1 pitch, and a metal ring-shaped original plate 2c having a notch 2a and a mounting hole 2b for attaching to the auger shaft 3 at the center is shown by a chain line in FIG. Mold in advance.

1 and 2 show a first embodiment of the device of the present invention.

In the figure, reference numeral 4 denotes a base, which is stably installed by supporting legs 5, 5 projecting to both sides in front and rear thereof.

Reference numeral 6 denotes a movable body, which is formed in a substantially “mold” shape by a vertical frame 7 and a horizontal frame 8, and the vertical frame 7 is inserted into a sheath-shaped strut 9 standing on one side of the base 4 for operation. It is slidable in the vertical direction by means 10 so that it can slide smoothly and straightly by abutting the holding rollers 11, 11 provided at appropriate positions on both sides of the sheath-like strut 9.

The above-mentioned operating means 10 uses a conventional hydraulic cylinder 12 that can easily obtain a high pressing force. The base of the operating means 10 is supported by the shaft 13 in the vicinity of the column 9 on the base 4, and the end of the rod 14 thereof is supported. A portion of the movable body 3 is supported by a shaft 15 on the horizontal frame 5, and the rod 14 is extended to slide the movable body 6 by an arbitrary amount.

Reference numeral 16 is a first support shaft projecting from the other side of the support column 9 of the base 4 at a predetermined angle, and is attached to a plurality of mounting holes 17 and fixing holes 18 which are formed on the side surface of the base 4 at intervals. By replacing the mounting pin 19 and the fixed pin 20, the inclination angle can be changed at intervals within the range of about 60 to 80 °.
Adjust the angle appropriately according to the pitch.

Reference numeral 21 denotes a second support shaft that is formed in the horizontal frame 8 of the movable body 6 at a predetermined angle. The second support shaft is rotatably attached to the side surface of the horizontal frame 8 by a mounting pin 22, and a large number of holes are fixed at intervals. Hole 23
By replacing the fixing pin 24 to the first support shaft 16
Corresponding to the inclination angle of, the inclination angle is converted at intervals within the range of about 60 to 80 °, and this inclination angle is when the ends of the first and second support shafts 16 and 21 come close to each other. That is, as shown in FIG. 1, when the later-described first and second mounting plates are closest to each other, they are set so that their axes are substantially coincident with each other.

Reference numeral 25 is a first mounting plate rotatably supported by a tip end of the first support shaft 16 via a bearing 26, and is mounted so that its upper surface is orthogonal to the first support shaft 16.

Reference numeral 27 is a second mounting plate rotatably supported by a tip end portion of the second supporting shaft 21 via a bearing 28, and its upper surface is orthogonal to the second supporting shaft 21 like the first mounting plate 25. It is installed so that

29 and 30 are fixing means of the annular original plate 2c provided correspondingly on one side on the first and second attachment plates 25 and 27, and as shown in FIGS. 1, 2 and 4, Second mounting plate 25, 27
Which is attached to the “shaped receiving body 31 and a pressing cylinder 32 corresponding to the receiving body 31, and is annularly connected to the gap between the first and second mounting plates 25 and 27 and the receiving body 31. Master 2
After inserting c, the rod 33 of the pressing cylinder 32 is extended to firmly pinch and fix the ring-shaped original plate 2c. Between the end face of the rod 33 and the ring-shaped original plate 2c surface, a metal plate-shaped space is provided. The interposition of the seat 34 stabilizes the holding.

The operation of this embodiment will be briefly described. The operating means 10 is operated to lower the movable body 6, and as shown in FIG. 1, the first and second attachment plates 25 and 27 are in the closest contact state. In the meantime, as shown in FIG. 3, the ring-shaped original plate 2c is inserted so that the cut 2a corresponds to the fixing means 29, 30, and one and the other of the cut 2a are fixed by the fixing means 29, 30. Hold in.

Then, when the movable body 6 is raised straight so that the rod 14 of the operating means 10 is extended and the second mounting plate 27 is separated from the first mounting plate 25, the second mounting plate 27 is in the diagonal state. It is held by the two support shafts 21 and moves upward, and since the annular original plate 2c is fixed at the cut 2a, it is expanded from the cut 2a and twisted in a spiral shape.

At this time, the ring-shaped original plate 2c is eccentric with the first and second support shafts 16 and 21, as indicated by the symbol L in FIG. 2, so that the ring-shaped original plate 2c is indicated by arrow p in FIG. Try to twist in the direction.

However, the first and second mounting plates 25,27 are
Since it is rotatably supported by the first and second support shafts 16 and 21 via the, the twisting force is immediately transmitted to the first and second mounting plates 25 and 27 to prevent twisting of the annular original plate 2c. As shown in FIG. 5, when the auger blade 2 thus formed is mounted on the auger shaft 3, the mounting angle a between the blade surface and the auger shaft 3 is accurate on all circumferential surfaces thereof.
The angle of attachment of each of the abutted edges is also equal to 90 °.

6 and 7 show a second embodiment of the device of the present invention.

In contrast to the vertical type of the above-described first embodiment, this is a horizontal type, the basic configuration is substantially the same, and the detailed description thereof will be omitted according to the first example. The movable body 6 which supports the second mounting plate 27 is engaged with two horizontal guides 35, 35 provided on the base 4 and can be moved back and forth, and can be moved back and forth by an operating means 10 such as a hydraulic cylinder. To be done.

FIG. 8 shows a third embodiment of the device of the present invention.

In the first and second embodiments described above, only one of the movable bodies 6 moves forward and backward, whereas in this example, both the members 6 and 6a supporting the first and second mounting plates 25 and 27 are operating means. 10,10
The two horizontal guides 35,35 provided on the base 4 by
The other construction is substantially the same as that of the first and second embodiments described above, and the detailed description of the construction and operation will be omitted.

(Effects of the Invention) In the auger blade molding apparatus of the present invention configured as described above, the annular raw plate, which is a material for forming the auger blade, is attached with a predetermined inclination angle with respect to the stretching direction. , The eccentricity of the spindles of the first and second mounting plates supporting the ring-shaped original plate is caused by the pulling, and the ring-shaped plate itself is twisted inward during the machining due to this eccentricity, which results in a uniform spiral. A shape is formed, its inner hole uniformly contacts the outer circumference of the auger shaft, and when it is mounted on the auger shaft, the mounting angle between the blade surface and the auger shaft is adjusted to an exact 90 ° on the entire peripheral surface. In addition, since the mounting angles of the abutted end edges are also the same, the welding work with the auger shaft can be easily performed.

Further, since the mounting angle between the blade surface and the auger shaft is made accurate on the entire circumferential surface, smooth and speedy discharge of excavated soil without unevenness of excavated soil during excavation work when inserted into a steel pipe. Can be done.

It has special effects such as.

[Brief description of drawings]

FIG. 1 shows a first embodiment of an auger blade forming apparatus according to the present invention, and is a front view showing a state before processing. FIG. 2 is a front view showing a state at the end of the above processing. FIG. 3 is a plan view showing the first and second mounting plates. FIG. 4 is a partial sectional view showing the fixing means. FIG. 5 is a front view showing a part of a state where the molded auger blade is attached to the auger shaft. 6 and 7 are plan views showing the second embodiment, FIG. 6 shows a state before processing, and FIG. 7 shows a state after processing.
FIG. 8 is a plan view showing a third embodiment. 9 to 11 show a conventional auger blade forming process. FIG. 9 is a plan view showing an annular plate, FIG. 10 is a front view showing the formed auger blade, and FIG. 11 is a diagram showing the auger blade. It is a partial front view which shows the state attached to the auger shaft. In the figure, 4 is a base, 10 is operating means, 6 and 6a are movable bodies, 16 is a first support shaft, 25 is a first mounting plate, 21 is a second supporting shaft, 27 is a second mounting plate, and 2c is an annular shape. The original plate. 2a is a cut line, and 29, 30 are fixing means.

Claims (2)

[Claims] 1. A base, a movable body that moves forward and backward in parallel to the base by an operating means, and a rotatably supported on a first support shaft that is inclined and inclined at a predetermined angle to the base. A first mounting plate, a second mounting plate rotatably supported on the movable body by a second supporting shaft projecting at substantially the same inclination angle as the first supporting shaft, and the first and the second mounting plates. (2) A forming device for an auger blade, which is provided on one side of the mounting plate, and is provided with a fixing means for holding the vicinity of a cut in the annular original plate. 2. An auger blade molding apparatus according to claim 1, wherein the base and the movable body are associated with operating means for imparting a reciprocating motion.