JP2007056664A - Mounting structure of excavating agitation blade in trencher type agitating mixer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure of an excavating agitation blade in a trencher type agitating mixer improving convenience in storing a chain and maintainability of the excavating agitation blade by forming the excavating agitation blade to be detachable from the chain, and preventing looseness and fall of the excavating agitation blade in an agitating and mixing time. <P>SOLUTION: In the trencher type agitating mixer, a plurality of excavating agitation blades 8 are mounted at the predetermined pitch to an endless drive chain 7 wound around a pair of sprockets. A plate holder 18 provided at the excavating agitation blade 8 and having a flat T-slot 17, and a base plate 25 provided at the drive chain 7, are detachably fitted through the T-slot, and then both are pressure-fixed in the overlapping direction by a bolt 27 and a nut 29 to mount the excavating agitation blade 8 to the drive chain 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mounting structure for a drilling and stirring blade in a so-called trencher type stirring mixer in which a drilling and stirring blade mounted on an endless chain is moved together with the chain, and in particular, the drilling and stirring blade is attached to and detached from the chain. As a result, it is possible to improve the convenience of chain storage and maintainability of the drilling agitating blade, reduce the shakiness of the drilling agitating blade at the time of stirring and mixing, and prevent the dropping of the excavating stirring blade in the trencher type stirring mixer This relates to the mounting structure.

An example of this type of trencher type agitating and mixing machine is described in Patent Document 1. The trencher-type stirring mixer described in Patent Document 1 is attached to the tip of an arm of a construction machine such as a backhoe, and a chain having a plurality of excavating stirring blades is wound around the drive wheel and the driven wheel. It is hung and supported, and the chain is driven around in the ground to stir and mix while excavating the ground with the excavating stirring blade.
JP 2003-268762 A

  In such a trencher type agitator / mixer, the excavation agitation blades are worn out by use, so that excavation agitation blades are appropriately replaced or repaired according to the degree of wear in order to maintain good excavation agitation performance. It is necessary to perform maintenance such as.

  However, the conventional trencher-type agitator / mixer does not consider attaching / detaching the excavating stirring blade, and the excavating stirring blade is welded and fixed to the link plate of the chain. The blade must be separated from the chain by fusing or the like, and a new excavation stirring blade must be welded to the chain, which is complicated. In addition, when performing work such as overburden repair of excavation stirring blades and fusing and welding associated with replacement, the chain is removed from the agitator mixer body to ensure the workability, and the chain pin is The chain needs to be removed and the chain is unfolded, which not only complicates the work, but also requires a large work space, resulting in poor maintainability.

  Further, in order to improve the efficiency of the stirring and mixing work, it is desirable that the width dimension of the excavating stirring blade is as large as possible, but in this case, if the chain is stored in a warehouse or the like with the drilling stirring blade attached, The excavation stirring blade is bulky and the space efficiency during storage is poor, and the excavation stirring blade itself has a feeling of protrusion due to the excavating blade, etc., making it difficult to handle and lacking convenience when storing the chain .

  Therefore, in order to make the excavation agitation blades removable, it has been proposed in part that mounting holes are provided in both the link plate of the chain and the excavation agitation blades, and the excavation agitation blades and the chain are pressed and fixed with bolts. However, in this case, the earth pressure resistance that the bolt bears during stirring and mixing is large, and the bolt tends to loosen due to vibration during stirring and mixing, and the stirring and mixing blades become loose and fall, resulting in a decrease in stirring and mixing efficiency. It is not practical because of fear.

  In view of such circumstances, the present invention improves the convenience during chain storage and maintainability of the excavator stirring blade by making the excavator agitator blade detachable from the chain, An object of the present invention is to provide an excavating stirring blade mounting structure in a trencher type stirring mixer that prevents dropping.

  According to the first aspect of the present invention, an endless chain is wound between a driving wheel at one end of the frame and a driven wheel at the other end of the frame, and a plurality of excavation stirring blades are attached to the chain at a predetermined pitch. The excavator agitating blade mounting structure in the trencher type agitator / mixer in which these excavator agitating blades are moved together with the chain, and has a T slot (T groove) in either one of the chain and the excavator agitating blade. A female side member is provided on the other side, and a male side member for receiving the female side member is provided on the other side, and the female side member and the male side member are detachably fitted with T-slot fitting, and then mechanically fixing means. The relative displacement between the two in the attaching / detaching direction along the T slot is restricted.

  For example, as in the second and sixth aspects of the invention, a plurality of excavating blades are provided on the surface side of the excavating stirring blade, and a stirring blade and a female side member having a T slot are provided on the back side of the excavating stirring blade. A certain plate holder is provided, and the base plate received in the T slot of the plate holder is provided on the chain as a male side member.

  Therefore, in at least the invention described in claim 1, the chain and the excavation stirring blade can be attached and detached by releasing the fixed state of the female member and the male member by the mechanical fixing means. When exchanging worn excavator agitating blades, it is possible to easily attach or remove an excavated agitator blade and new excavator agitator blades, and excavate from the chain when repairing worn excavator agitator blades. The workability can be secured by removing the stirring blade, and the work can be performed in a small work space. Further, at the time of stirring and mixing, the excavation stirring blade is restrained by the groove depth and width of the T-slot with respect to the chain, and the mechanical fixing means is used in both directions of attaching and detaching the T-slot. Since the relative displacement of the drilling agitating blade is restricted, the excavation stirring blade is not rattled against the chain, and the mounting state of the excavation stirring blade on the chain is solid and stable.

  More preferably, as in the invention described in claim 3, the T slot and the male member to be received by the T slot are tapered in the longitudinal direction of the chain, and the attaching / detaching direction along the T slot is determined. Since the male side member and the female side member are T-slot fitted and taper-fitted when set in the longitudinal direction of the chain, the male side member is inserted into the T slot so that the female side member of the male side member is inserted. In addition to making it easier to attach the excavating stirring blade to the chain, especially when the excavating stirring blade receives resistance from the stirring and mixing operation, By setting the taper fitting in the tightening direction, the effect of preventing the female side member from coming off from the male side member is exerted, and in the unlikely event that the mechanical fixing means is loosened, Also it will be possible to prevent rattling and falling off of the drilling stirring blade.

  In addition, as described in claim 4, the mechanical fixing means press-fixes the female side member and the male side member in the overlapping direction, so that the mounting state of the excavation stirring blade with respect to the chain is more robust and Desirable for stability.

  Further, since the restraining force for preventing the rattling of the excavating stirring blade as described above is all borne by the portion that is engaged with the T-slot fitting, the load of the mechanical fixing means is relatively small, and the mechanical fixing is performed. Since the means only needs to have a function of preventing the excavation stirring blade from falling off the chain, the mechanical fixing means can be sufficiently handled by a single bolt or pin as in the invention described in claim 5. .

  Further, as in the invention of claim 7, a large number of female members or male members are attached to the chain at a predetermined pitch, and any one of these female members or male members is selected. When it is possible to use, by arbitrarily selecting the mounting pitch of the excavation stirring blade according to the degree of hardness and the like of the target object of the stirring and mixing work, the so-called blade cutting frequency for the target object during mixing and stirring can be arbitrarily set. . In this case, as in the invention described in claim 8, it is desirable to prevent the female side member or the male side member which is not selectively used from being protected by a protective cover placed thereon.

  According to the first aspect of the present invention, the excavation stirring blade and the chain can be easily attached / detached by releasing the fixed state of the female member and the male member by the mechanical fixing means. In addition to improving the maintainability when the agitating blade is worn, removing the excavating agitating blade and the chain and storing them increases the space efficiency during storage. Further, at the time of stirring and mixing, rattling of the excavating stirring blade is prevented by fitting the T-slot between the male side member and the female side member, and the stirring and mixing efficiency is improved.

  According to the third aspect of the present invention, the male side member and the female side member are T-slot-fitted and taper-fitted so that the relative positioning of the two is achieved, and the excavation stirring blade is attached to the chain. In addition to further improving the maintainability of the excavating stirring blade, the taper between the male member and the female member when the excavating stirring blade receives resistance due to the stirring and mixing operation, especially in the circumferential direction of the chain during stirring and mixing. By setting the mating direction to be more tightening direction, the female side member can be prevented from coming off from the male side member, and excavation agitation is possible even if the mechanical fixing means is loosened. Shaking and dropping of the wing can be prevented in advance, and the stirring and mixing efficiency is further improved.

  Further, according to the invention described in claim 7, it is possible to improve the stirring and mixing efficiency by arbitrarily selecting the so-called blade cutting frequency for the object according to the degree of hardness or the like of the object to be stirred and mixed. There are advantages you can do.

  1 and the following drawings are views showing a preferred embodiment of the excavation stirring blade mounting structure in the trencher type stirring mixer according to the present invention.

  FIGS. 1A and 1B show a ground improvement device having a trencher type stirring mixer 1 (hereinafter simply referred to as “mixer”) 1 as a main element, and FIG. The state before the machine 1 penetrates into the ground, (B) in the figure shows the state where the mixer 1 penetrates into the ground. This mixing machine 1 uses a backhoe 2 as a construction machine as a base machine (base machine), and is detachably attached to the tip of an arm 3 for the purpose of excavating soil and stirring and mixing the solidified material.

  2A shows details of the mixer 1 of FIG. 1, and FIG. 2B is a front view of FIG. 2A. FIG. 3 is an enlarged view of the main part of FIG. As shown in FIG. 3 in addition to (A) and (B) of FIG. 2, the mixer 1 includes a driving wheel 5 such as a chain sprocket on the upper part of a substantially prismatic frame 4 and a chain on the lower part of the frame 4. A driven wheel 6 such as a sprocket is provided on each of them, and an endless drive chain 7 is wound around the drive wheel 5 and the driven wheel 6, and a plurality of wider than the drive chain 7 is provided on the outer periphery of the drive chain 7. Excavation stirring blades (hereinafter simply referred to as “stirring blades”) 8, 8A, 8B, and 8C are detachably mounted. Here, several types of stirring blades 8, 8A, 8B, 8C having different width dimensions (four types in the illustrated example) are made into one set, and a plurality of sets of excavation stirring blades 8, 8A, 8B, 8C can be attached and detached at equal pitches. It is attached. A predetermined tension is applied to the drive chain 7 by a plurality of chain tensioners 9 provided on the frame 4.

  Further, a solidifying material discharge device 10 is provided at the tip of the frame 4, and for example, a powdery or slurry-like solidifying material pumped by a grout pump or the like through the discharge pipe 11 is discharged. ing.

  Then, by starting the hydraulic motor 12 provided at the upper part of the frame 4, the agitating blades 8, 8 A, 8 B, 8 C move around together with the drive chain 7, and the mixer 1 itself by the thrust of the backhoe 2 along with it. As shown in FIG. 1 (B), the soil is excavated and mixed with the solidified material as the soil is excavated.

  As is clear from FIGS. 2 and 3, the stirring blades 8, 8A, 8B, and 8C have the same basic structure and are different in width from each other, and they have different widths along the circumferential direction of the chain. In the process in which the agitator blades 8, 8 A, 8 B, and 8 C circulate together with the drive chain 7, each of the stirring blades 8, 8 A, 8 C, and 8 C is mounted at an equal pitch so that the dimensions increase stepwise or decrease stepwise. Improve the stirring and mixing performance by making the excavating blades 13 provided on the stirring blades 8, 8 A, 8 B, and 8 C not always pass through the same position but actively and repeatedly meander in the width direction of the drive chain 7. I am trying.

  The agitation blades 8, 8A, 8B, and 8C are all attached to the drive chain 7 in the same structure. FIGS. 4A and 4B show details of the agitation blade 8 attachment structure as a representative example. 5 shows an exploded view of FIG. FIG. 6 shows details of the stirring blade 8 alone, and FIG. 7 shows details of the mounting portion alone on the drive chain 7 side.

  As shown in FIGS. 4 and 5, a base plate 25 that functions as a male member is mounted on the drive chain 7 side, while a plate holder 18 with a clamp bar 19 is mounted as a female member on the stirring blade 8 side. They are both detachably fixed by bolts 27 and nuts 29 which are screw members after being fitted into a concave and convex shape with a T-slot fitting form.

  More specifically, as shown in FIG. 6 in addition to FIGS. 4 and 5, the agitating blade 8 is configured by using a wide and flat blade body 14 as a base body, and in the longitudinal direction on the surface side of the blade body 14. A plurality of (four in the illustrated example) digging blades 13 are projected in a substantially upright posture, and an acute cutting edge 13 a is formed at the tip of each digging blade 13 in the circumferential direction. Each digging blade 13 is welded and fixed to the wing body 14 via the digging blade mounting plate 15 in order to ensure a certain degree of blade edge (height from the wing body 14 to the cutting edge 13a) to some extent. A reinforcing plate 21 is provided at the end of the blade body 14 in the circumferential direction.

  A plate holder 18 that is a female member having a flat and wide T-slot (T-groove) 17 is welded and fixed to the back side of the blade body 14 together with a stirring blade 16 that is perpendicular to the surface and extends in the longitudinal direction. Yes. The plate holder 18 is provided at substantially the center in the longitudinal direction of the wing body 14 and is constituted by two clamp bars 19 and a back plate 20. The back plate 20 is fixed to the wing body 14 by welding. On the other hand, each clamp bar 19 has a so-called angled cross-sectional shape, and is inclined to each other by a predetermined angle with respect to the longitudinal direction of the drive chain 7 so as to face each other in a so-called substantially square shape. It is welded and fixed to the back plate 20 at welding locations B1 and B2 shown in FIGS. The back side corner formed by the back plate 20 and the clamp bar 19 is reinforced by a reinforcing plate 22 which is welded and fixed to the same part.

  In this way, by arranging the pair of clamp bars 19 on the back plate 20 so as to face each other in a substantially C shape and fixing them by welding, as shown in FIG. 6, the flat width of the open side groove width W1 is relatively large. A T-shaped slot 17 is formed, and at the same time, the T-slot 17 is formed in a tapered shape whose groove width dimension W2 gradually changes in the longitudinal direction of the drive chain 7. Here, the depth D of the groove of the T slot 17 is set to a size capable of receiving the plate thickness of the base plate 25 on the drive chain 7 side which will be described later. A mounting hole 23 is formed through the center of the blade body 14 and the center plate 20.

  On the other hand, as shown in FIGS. 4 and 5, in addition to FIGS. Are fixed at an equal pitch. As shown in FIG. 7 in addition to FIGS. 4 and 5, the base plate 25 is welded and fixed on the link plate 24 forming the drive chain 7 at welding locations B3 and B4. The base plate 25 is formed as a substantially trapezoidal plate having an inclined surface 25a corresponding to the inclination of the clamp bar 19 so as to fit into the T slot 17 on the stirring blade 8 side by so-called T slot fitting and taper fitting. In addition, a mounting hole 26 is formed through the central portion so as to match the mounting hole 23 on the stirring blade 8 side.

  Then, as shown in FIG. 5, the plate holder 18 on the stirring blade 8 side and the base plate 25 on the drive chain 7 side are overlapped so that the T slot 17 of the plate holder 18 and the base plate 25 are connected to the longitudinal direction of the drive chain 7. By fitting the so-called T-slot in the direction and by taper fitting, the relative positioning of the two is performed, and both the mounting holes 23 and 26 are matched. In this state, a bolt 27 as a mechanical fixing means is inserted into the mounting holes 23 and 26 and a nut 29 is tightened via a spring washer 28, whereby the stirring blade 8 is moved against the link plate 24 of the drive chain 7. The base plate 25 and the plate holder 18 are restrained from being displaced relative to each other in the attaching / detaching direction along the T slot 17. That is, the stirring blade 8 is detachably fixed to the drive chain 7.

  In addition, the attachment structure which can attach or detach such a stirring blade 8 is the same also about the other stirring blades 8A, 8B and 8C.

  Therefore, according to the mixer 1 that employs such a mounting structure of the stirring blades 8, 8A, 8B, and 8C, the mixing blade 1 is penetrated into the ground and the stirring blades 8, 8A, 8B, and 8C are connected to the drive chain. It is the same as that of the prior art that it is moved around in the up-and-down direction together with 7, and performs agitation and mixing with the solidified material while excavating the ground.

  More specifically, in the process in which the agitating blades 8, 8A, 8B, and 8C circulate in the ground together with the drive chain 7, the sharp cutting edge 13a provided at the distal end of the digging blade 13 excavates the ground, The strength of the ground to be improved is increased by stirring and mixing the excavated soil and the powdered or slurry-like solidified material discharged from the solidified material discharging device 10 mainly by the stirring blade 16.

  In this case, the circumferential direction of the drive chain 7 is such that when the stirring blades 8, 8A, 8B, 8C are subjected to earth pressure resistance, the taper fitting between the T slot 17 of the plate holder 18 and the base plate 25 is further tightened. Set in the direction. As a result, the stirring blades 8, 8 A, 8 B, and 8 C are not only restrained by the groove depth D of the T slot 17 in the overlapping direction with the base plate 25 on the drive chain 7 side, but are also clamped by the bolts 27. Since they are fixed, the stirring blades 8, 8A, 8B, 8C will not be rattled in the direction of polymerization with the base plate 25, and even if the bolts 27 become loose, the stirring blades 8, 8A, 8B , 8C can be prevented from rattling or falling off.

  Moreover, in addition to the tape slot fitting of the T slot 17 of the plate holder 18 and the base plate 25 as described above, the rotational direction of the drive chain 7 so that earth pressure resistance is applied in the tightening direction of the taper fitting. Therefore, the effect of preventing the stirring blades 8, 8A, 8B, 8C from being removed from the base plate 25 is exhibited and, for example, the stirring blades 8, 8A, The occurrence of rattling of 8B and 8C can be reliably prevented, and the mounting state of the stirring blades 8, 8A, 8B and 8C with respect to the drive chain 7 becomes firm and stable.

  Further, since the restraining force for preventing rattling of the agitating blades 8, 8A, 8B, and 8C as described above is borne by the portion providing T-slot fitting, the burden on the bolt 27 is relatively reduced. In short, the bolt 27 only needs to have a function of preventing the stirring blades 8, 8A, 8B, and 8C from falling off the base plate 25, so that the bolt 27 has a small diameter and a single one is sufficient. It can respond.

  On the other hand, when the stirring blades 8, 8A, 8B, 8C are worn out by use, it is necessary to perform maintenance such as replacement or repair. In this case, the stirring blades 8, 8A, 8B, 8C are removed from the drive chain 7. Deal with it by removing it. That is, when removing the stirring blades 8, 8 A, 8 B, 8 C, the connection by the bolts 27 and the nuts 29 is released, and the stirring blades 8, 8 A, 8 B, 8 C are removed from the T slot 17 by using, for example, a hammer. If a striking force is applied in the extraction direction to release the taper fitting at the slot fitting portion, the removal can be performed very easily.

  Further, when the drive chain 7 is removed from the mixer 1 and stored, by removing the stirring blade 8 from the drive chain 7 and storing it, unnecessary bulkiness can be eliminated and the storage space for both can be reduced. .

  In addition, since the stirring blades 8, 8A, 8B, and 8C can be arbitrarily attached and removed, a stirring blade having a suitable shape is selected according to the soil properties such as the hardness of the ground where excavation stirring work is performed, for example. It is possible to replace the stirring blades with the chain 7, and the versatility of the drive chain 7 is enhanced, so that the economy is excellent.

  Moreover, since the drive chain 7 and the stirring blade 8 are pressed and fixed by the single bolt 27, the attaching and detaching work of the stirring blade 8 can be performed more easily.

  The drive chain 7 is equipped with a plurality of four types of stirring blades 8, 8A, 8B, and 8C as stirring blades, but it is of course possible to use a drive chain 7 with a plurality of specific one type of stirring blades. Is possible.

  FIGS. 8A and 8B show a modified example of a so-called T-slot fitting portion having the T-slot in the first embodiment as a main element as the second embodiment of the present invention. In FIGS. 8A and 8B, the same reference numerals are given to the portions common to FIG. 5 described above.

  In the second embodiment, as shown in FIG. 8B, the clamp bars 19 forming the plate holder 30 as the female member on the stirring blade 33 side are parallel to each other and are connected to the drive chain. 7 is welded and fixed to the back plate 20 so as to be parallel to the circumferential direction of the groove 7, thereby changing the groove width of the T slot 31 configured with the opposing gap between the clamp bars 19 in the circumferential direction of the drive chain 7. It is formed as a so-called straight type. Accordingly, as shown in FIG. 8A, the base plate 32 as a male member fixedly welded to the drive chain 7 side has a substantially rectangular plate shape so that it can be received by the straight type T slot 31. It is formed as a thing.

  In the second embodiment, although the taper fitting effect described above cannot be expected, the plate holder 30 and the base plate 32 are not changed in so-called T-slot fitting. Therefore, the plate holder 30 and the base plate are not changed. As for the effect of preventing the shaking of the stirring blade 33 in the direction of polymerization with 32 and the effect of preventing the shaking of the stirring blade 33 with the bolt 27 as the oscillation center, the same effect as in the first embodiment is obtained. can get.

  Further, in order to make the rotation direction of the drive chain 7 forward and backward as necessary for further uniforming the ground improvement quality, the drive chain 7 is rotated forward unlike the first embodiment. The state where the stirring blade 33 is attached to the drive chain 7 does not change between the case and the case where it is reversed, which contributes to further uniform ground improvement quality.

  9 to 11 show a third embodiment of the present invention. In particular, FIG. 9 shows details of the drive chain 7 not equipped with the stirring blades 8, 8A, 8B, and FIG. The state where wings 8, 8A and 8B are mounted is shown.

  As shown in FIG. 9, the present embodiment is based on the structure of the first embodiment, but the drive chain 7 has a larger number of base plates 25 at a smaller pitch than the first embodiment. The base plates 25 can be arbitrarily selected and used.

  Therefore, under this configuration, for example, as shown in FIG. 10 (A), three kinds of stirring blades 8, 8A, 8B can be detachably mounted on the base plate 25 every other two. As shown in (B) of FIG. 10, for example, three kinds of stirring blades 8, 8A, 8B can be mounted on the base plate 25 every other one.

  Further, as shown in FIGS. 11A and 11B, a plate cover 34 serving as a protective cover is attached to the base plate 25 that is not selectively used. This means that the base plate 25 that is not selectively used also moves around the ground together with the drive chain 7 and is intended to protect the base plate 25 from wear due to direct contact with the earth and sand. The plate cover 34 is formed, for example, by bending a steel plate into a so-called flat C channel shape. The plate cover 34 can be attached to and detached from the base plate 25 along the longitudinal direction of the drive chain 7 and is attached at a position corresponding to the mounting hole 26 of the base plate 25. A hole 35 is formed, and the base plate 25 is covered with a plate cover 34, and then a bolt 27 is inserted into the mounting holes 26, 35 of the base plate 25 and the plate cover 34, and a nut 29 is interposed via a spring washer 28. It is clamped.

  Therefore, according to the third embodiment, in addition to the same effects as those of the first embodiment described above, the mounting pitch of the stirring blades 8, 8A, 8B is set to the hardness of the ground to be subjected to the stirring and mixing operation. By arbitrarily selecting according to the soil properties such as, it is possible to arbitrarily set the so-called blade cutting frequency for the ground at the time of mixing and stirring, there is an advantage that the mixing and stirring quality and mixing and stirring efficiency can be improved.

  Further, by attaching the plate cover 34 to the base plate 25 that is not selectively used, it is possible to prevent the base plate 25 from being worn by direct contact with earth and sand.

  In the present embodiment, a substantially trapezoidal plate-like base plate 25 similar to that in the first embodiment is adopted, but a substantially rectangular plate-like base plate as in the second embodiment is used as necessary. Of course, it is possible to adopt 32.

  FIGS. 12 and 13 are views showing an example in which the taper pin 36 is used as the mechanical fixing means in the third embodiment as the fourth embodiment of the present invention, and FIGS. ) Is a view showing a state where the stirring blade 8 is attached to the drive chain 7, and FIGS. 13A and 13B are views showing a state where the plate cover 34 is attached to the drive chain 7. FIG.

  In the fourth embodiment, as shown in FIGS. 12A and 12B, the mounting hole 37 formed in the base plate 25 is formed in a tapered shape having a smaller diameter toward the drive chain 7 side. At the same time, the mounting hole 38 formed on the stirring blade 8 side is formed in a tapered shape that is continuous with the mounting hole 37 on the base plate 25 side.

  Then, as in the third embodiment, the plate holder 18 on the agitating blade 8 side and the base plate 25 on the drive chain 7 side are overlapped, and the two are positioned relative to each other by fitting so-called T slots, Both mounting holes 37, 38 are coincident with each other. In this state, the taper pin 36 having a shape matching the mounting holes 37, 38 is press-fitted into the mounting holes 37, 38 as a mechanical fixing means, and the blade body 14 and the taper pin 36 are spot-welded at the welding point B5. By preventing 36 from coming off, the plate holder 18 and the base plate 25 are pressed and fixed in the overlapping direction of the taper pin 36 and the mounting holes 37 and 38 with a taper fit.

  Further, as shown in FIGS. 13A and 13B, the plate cover 34 is similarly provided with a mounting hole 40, and the plate cover 34 has the same mounting structure as that of the stirring blade 8 in the base plate 25. It is attached.

  That is, the taper pin 36 restricts relative displacement of the plate holder 18 or the plate cover 34 and the base plate 25 in the attaching / detaching direction along the T slot 17. On the other hand, when removing the stirring blade 8 and the plate cover 34 from the drive chain 7, for example, using a chisel or the like, after peeling off the weld bead at the weld location B 5 that functions as a taper pin 36 detachment, the taper pin 36 is removed. By applying a striking force in the direction of releasing the taper fitting with the mounting holes 37 and 38 and pulling out the taper pin 36, the plate holder 18 and the base plate 25 can be relatively displaced in the attaching / detaching direction along the T slot. 8 and the plate cover 34 can be removed from the drive chain 7.

  In addition, the attachment structure in which such a stirring blade 8 can be attached and detached is exactly the same for the other stirring blades 8A and 8B.

  Therefore, the fourth embodiment can provide substantially the same effect as that of the third embodiment.

  As the mechanical fixing means, in addition to the bolt 27 and the taper pin 36 described above, the plate holder 18 and the base plate 25 are spot-welded to restrict relative displacement of both in the attaching / detaching direction along the T slot 17. You may make it do.

It is explanatory drawing which shows the outline of the ground improvement apparatus which uses a backhoe as a mother machine as embodiment of this invention, (A) is a figure which shows the state before construction, (B) is a figure which shows the state in construction. It is explanatory drawing which shows the detail of the trencher type | mold stirring mixer in FIG. 1, (A) is the enlarged view, (B) is a side view of the figure (A). Explanatory drawing which expand | deployed the drive chain in FIG. It is a figure which shows the detail of the excavation stirring blade shown to (B) of FIG. 2 as 1st Embodiment, (A) is the enlarged view, (B) is a partially notched front view of the figure (A). FIG. 5 is an exploded explanatory diagram of FIG. 4, illustrating a direction in which the excavating stirring blade is attached and detached. It is explanatory drawing which shows the detail of the excavation stirring blade in FIG. 5, (A) is the partially notched front view, (B) is the back view, (C) is the side view of the figure (B). It is explanatory drawing which shows the detail of the drive chain in FIG. 5, (A) is the partially notched front view, (B) is the back view. It is explanatory drawing which shows the detail of an excavation stirring blade as 2nd Embodiment, (A) is a figure which shows the detail of a baseplate, (B) is the front view. Explanatory drawing which shows the detail of the drive chain of the state by which the excavation stirring blade is not mounted | worn as 3rd Embodiment. Explanatory drawing which shows the state which attached the excavation stirring blade to the drive chain of FIG. 10 in (A) and (B). FIGS. 10A and 10B are explanatory views showing details of the base plate not equipped with the excavating stirring blade, where FIG. 10A is an enlarged view and FIG. 10B is a partially cutaway front view of FIG. Figure. It is a figure which shows the state which attached the stirring blade to the drive chain as 4th Embodiment, Comprising: (A) is the top view, (B) is the partially notched front view of the figure (A). It is a figure which shows the state which attached the plate cover to the drive chain as 4th Embodiment, (A) is the top view, (B) is the partially notched front view of the figure (A).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Trencher type stirring mixer 4 ... Frame 5 ... Drive wheel 6 ... Driven wheel 7 ... Drive chain (chain)
8, 8A, 8B, 8C ... excavation stirring blade 13 ... excavation blade 16 ... stirring blade 17 ... T slot 18 ... plate holder (female side member)
25 ... Base plate (male side member)
30 ... Plate holder (female side member)
31 ... T slot 32 ... Base plate (male side member)
33 ... Excavation stirring blade 27 ... Bolt (Mechanical fixing means)
34 ... Plate cover (protective cover)
36 ... Taper pin (Mechanical fixing means)

Claims (8)

An endless chain is wound between the drive wheel at one end of the frame and the driven wheel at the other end of the frame, and a plurality of excavation agitation blades are attached to the chain at a predetermined pitch, and these excavation agitation blades are attached to the chain. An excavating stirring blade mounting structure in a trencher type stirring mixer adapted to move around,
A female member having a T-slot is provided on one of the chain and the excavating stirring blade, and a male member that receives the female member is provided on the other, respectively.
The female side member and the male side member are detachably fitted with T-slot fitting, and the relative displacement between the two in the detaching direction along the T-slot is regulated by mechanical fixing means. An excavating stirring blade mounting structure in a trencher-type stirring mixer.   The plate holder having a T slot is provided on the back surface of the excavating and stirring blade as a female side member, and the base plate received in the T slot of the plate holder is provided on the chain as a male side member. A mounting structure of a drilling stirring blade in the described trencher type stirring mixer.   The T-slot and the male member to be received by the T-slot are tapered in the longitudinal direction of the chain, and the attaching / detaching direction along the T-slot is set in the longitudinal direction of the chain. A structure for mounting a drilling stirring blade in the trencher type stirring mixer according to claim 1 or 2.   The excavation stirring blade in the trencher type stirring mixer according to any one of claims 1 to 3, wherein the mechanical fixing means press-fixes the female side member and the male side member in the overlapping direction. Mounting structure.   5. The mounting structure for excavating stirring blades in a trencher type stirring mixer according to claim 4, wherein the mechanical fixing means is a single bolt or pin.   The trencher type according to any one of claims 1 to 5, wherein the excavation stirring blade has a plurality of excavation blades on the front surface side and a stirring blade together with a female side member on the back surface side. Mounting structure for excavating stirring blades in a stirring mixer.   A plurality of female members or male members are attached to the chain at a predetermined pitch, and any one of these female members or male members can be selected and used. The mounting structure of the excavation stirring blade in the trencher type stirring mixer in any one of 1-6. 8. The excavating stirring blade mounting structure in a trencher type stirring mixer according to claim 7, wherein the female side member or the male side member that is not selectively used is protected by a protective cover placed thereon.

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