JP4600422B2 - Underground continuous trench excavator - Google Patents

Description

The present invention belongs to the technical field in the earth the continuous excavating apparatus Ru used when drilling a continuous groove in the ground.

  As is well known, when excavating a continuous groove in the ground, a trencher type excavator equipped with a chain cutter is used. The bit attached to the excavator is composed of a pedestal and a digging blade, and the pedestal of the bit is attached to the outer peripheral portion of the endless chain by bolts. And the excavation blade is attached to the base by welding.

  Further, a concave locking member (boss) is provided on the pedestal, and the base end side of a columnar excavation blade having a circular or rectangular cross section is engaged with the locking member. In addition, it is known that a pin is inserted into a pin hole provided on the base end side of the locking member and the excavating blade so that the excavating blade is attached to the locking member (for example, Patent Documents). 1).

  Moreover, what welded the excavation blade (cutter bit) to the bit plate (pedestal) bolted to the endless chain is known (for example, refer patent document 2).

Further, a plurality of types (10 types in this case) of cutter bits A to J having different bit piece arrangements are attached to the endless chain at intervals in the chain rotation direction to constitute a set of cutter bit units. A plurality of sets of the cutter bit units are provided in the chain rotation direction to constitute an endless chain cutter.
In this case, the excavation blade (cutter) is fixed by welding (for example, refer to Patent Document 3).
Japanese Patent Laid-Open No. 11-81368 JP 2001-81805 A Japanese Patent No. 2554451

  The bit according to the conventional example is provided with a boss on the pedestal for mounting the excavating blade, which can be directly attached to the pedestal or only the excavating blade can be replaced. Therefore, it is necessary to prepare a plurality of bits with excavation blades attached at different positions on the excavation blade or the pedestal, depending on the mounting arrangement of the excavation blades of the bits. In other words, it is extremely useless to prepare bits with excavation blades at all the arrangement positions in advance at the construction site. In addition, when the excavating blade is locally worn or damaged during excavation of the continuous groove, a repair work of welding the excavating blade for replacement to the base must be performed at the excavation site. When welding excavating blades at such sites, it is difficult to ensure the welding accuracy and the quality associated therewith, resulting in misalignment of the mounting position, welding defects, local excavation of the excavating blade, and deformation. It is easy to do. And not only excavation efficiency falls by such position shift, breakage, and deformation of the excavating blade, but also it has a negative effect on the quality of the continuous groove.

Accordingly, an object of the present invention are easy to repair work in the field and yet to provide a possibly tighten that in place continuous excavating apparatus to easily change the position of the digging edge.

The present invention was made in view of the above circumstances, and therefore in order to solve the above problems, it is an aspect of means for continuous underground excavating apparatus is employed according to claim 1 of the present invention, the traveling A cutter post attached to the carriage so as to be movable up and down, and a plurality of cutter chain units each having a bit attached to the chain unit are connected so as to be endless, and includes a cutter chain mounted on the cutter post. In the underground continuous groove excavating apparatus, the bit is a pedestal attached to the chain unit, the pedestal having a guide means projecting from a surface of the pedestal and extending in a width direction of the pedestal, and one end of the guide means And a pin for fixing the excavating blade to the guide means of the pedestal, and an upper surface of the pedestal is provided on the upper surface of the guide means. A plurality of pin engaging grooves extending in a direction orthogonal to the direction are provided in parallel to each other at a predetermined interval in the width direction of the pedestal, and a pin hole into which the pin can be inserted is provided in the excavating blade, and is fitted into the guide means. The excavating blade is fixed to the pedestal by inserting a pin into the pin hole of the excavating blade and engaging with any of the plurality of pin engaging grooves .
According to the underground continuous groove excavation apparatus according to claim 1, the excavation blade is fitted from one end of the guide means that protrudes from the surface of the pedestal attached to the cutter chain and extends in the width direction of the pedestal, and the excavation blade is guided by the guide means. The excavating blade is fixed to the pedestal simply by inserting a pin into the pin hole of the excavated cutting blade and engaging with any of a plurality of pin engaging grooves extending in a direction perpendicular to the width direction of the pedestal. be able to. Therefore, since the excavating blade can be attached at a predetermined position in the width direction of the pedestal, when the excavating blade is worn or damaged, it can be easily replaced with a new excavating blade, and the excavating blade Even after exchanging, a continuous groove with the same excavation efficiency and quality as before exchanging can be excavated.

The underground continuous groove excavating apparatus according to claim 2 of the present invention is characterized in that the underground continuous groove excavating apparatus according to claim 1 is characterized in that the first bit and the first bit are used as the bit. A second bit narrower than the bit, and provided with first guide means at both ends in the width direction of the first bit, while the second bit includes a pair of first guide means provided in the first bit. The second guide means is provided at a position corresponding to each other .
According to the underground continuous groove excavating apparatus according to claim 2, the first guide means is provided at both ends in the width direction of the first bit , and the first bit is provided for the second bit having a width smaller than the first bit. The second guide means is provided at a position corresponding to the space between the pair of first guide means provided in the. Accordingly, a continuous groove having a width corresponding to the outer width of the two excavating blades attached to each of the pair of first guide means of the first bit is excavated in the ground. Excavated by an excavating blade attached to the second guide means of the second bit.

It is a feature of the means for continuous underground excavating apparatus is employed according to claim 3 of the present invention, in the underground continuous ditch excavating device according to any one of of the preceding claims 1 or 2, wherein the pin spacing engagement groove each other at about the same der Rutokoro the thickness of the digging edge.
According to the underground continuous groove excavating apparatus according to the third aspect, the distance between the pin engaging grooves provided in the guide means is substantially the same as the thickness of the excavating blade. By shifting one by one and fixing the excavating blade, it is possible to excavate a continuous groove without excavation residue in the ground.

According to the underground continuous groove excavation apparatus according to claim 1 of the present invention, the excavation blade is fitted into the excavation blade from one end of the guide means that protrudes from the surface of the base attached to the cutter chain and extends in the width direction of the base. Is attached to the guide means, the pin is inserted into the pin hole of the attached excavating blade, and the excavating blade is attached to the pedestal only by engaging with any of a plurality of pin engaging grooves extending in a direction perpendicular to the width direction of the pedestal. Can be fixed. Therefore, since the excavating blade can be attached at a predetermined position in the width direction of the pedestal, when the excavating blade is worn or damaged, it can be easily replaced with a new excavating blade, and the excavating blade Even after exchanging, a continuous groove with the same excavation efficiency and quality as before exchanging can be excavated.

According to the underground continuous trench excavation apparatus according to claim 2 of the present invention, the first guide means is provided at both ends in the width direction of the first bit, and the second bit having a width smaller than the first bit is provided. The second guide means is provided at a position corresponding to between the pair of first guide means provided in the first bit. Accordingly, a continuous groove having a width corresponding to the outer width of the two excavating blades attached to each of the pair of first guide means of the first bit is excavated in the ground. Excavated by an excavating blade attached to the second guide means of the second bit.

According to the underground continuous groove excavating apparatus according to claim 3 of the present invention, the distance between the pin engaging grooves provided in the guide means is substantially the same as the thickness of the excavating blade. By shifting the joint grooves one by one and fixing the excavating blade, it is possible to excavate a continuous groove that has no excavation residue in the ground.

The engagement Ru in place continuous excavating device in the form status of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic configuration explanatory view of an underground continuous groove excavating apparatus during continuous groove excavation, FIG. 2 (a) is a front view of a part of a cutter chain, and FIG. 2 (b) is FIG. ) is a B arrow view of FIG. 2 (c) is a view seen in the arrow C of FIG. 2 (b), FIG. 3 is Ru exploded perspective view der the first bit.

The code | symbol 1 shown in FIG. 1 is an underground continuous ditch excavator. The underground continuous groove excavating apparatus 1 includes a crawler type traveling carriage 2, and a vertical cutter post 3 is attached to the traveling carriage 2 so as to be movable up and down. The cutter post 3 is hung on the idler and Contact sprockets thus provided for the top and bottom of the cutter post 3 is driven by a hydraulic motor with reduction gear, not shown drilling a continuous groove in the ground, the configuration to be described later An endless cutter chain 4 is provided. The continuous groove is excavated by the traveling of the traveling carriage 2 and the driving of the cutter chain 4.

The cutter chain 4 includes a cutter chain unit 5 as shown in FIGS. 2A, 2B, and 2C and FIG. 3, and becomes endless when a plurality of cutter chain units 5 are connected. It is configured as follows. The cutter chain unit 5 includes a chain unit 6 configured as described later. The first bit 7 (7a, 7b, 7c, 7d) which is the widest and has the following four types of configurations having the same width is bolted to the central portion in the longitudinal direction of the chain unit 6, Between them, a spacing plate 8 is bolted.

  In addition, a second bit 9 having a medium width, which will be described later, is bolted to each of the outer sides of the left and right first bits in FIG. Further, on the side opposite to the first bit 7 of these second bits 9, a small pedestal 101, a boss 102 provided at the center in the width direction of the pedestal 101, and a drilling blade 103 attached to the boss 102. A third bit 10 consisting of The spacing plate 8 is bolted to the third bit 10 on the side opposite to the second bit 9.

As shown in FIGS. 2A and 2B, the first bits 7a, 7b, 7c, and 7d are horizontally long and are horizontally long pedestals formed so that the widths at both ends become narrower toward the ends. 71 is provided. Further, guide means 72 (described later) project from the pedestal 71 on the same line perpendicular to the center line in the width direction of the chain unit 6 and on both end sides. Excavation blades 73 to be described later are attached. The mounting interval between the excavating blades 73 is the largest for the first bit 7a, and the excavating blades 73 are mounted at positions where the thickness of the excavating blade 73 is reduced by two times in the order of the first bits 7b, 7c, and 7d.

The guide means 72 has a configuration in which a wide head is formed at the top of the plate-like member, that is, its cross-sectional shape is formed as if it were similar to the cross-sectional shape of the upper half of the rail for a railway vehicle. Yes. A plurality of pin engaging grooves 72a are set on the upper surface of the guide means 72 in a direction perpendicular to the longitudinal direction of the guide means 72 at a predetermined interval (approximately the same size as the width of the excavating blade). are provided in parallel at a there). The excavating blade 73 includes an engaging portion 73a including a groove through which an upper portion of the plate-like member of the guide means 72 passes, and a head fitting portion that is connected to the groove and into which the head is fitted. A pin hole 73b is provided in a direction orthogonal to the engaging portion 73a.

  That is, when the excavating blade 73 is attached to the guide means 72, the engaging portion 73a is fitted from one end side of the guide means 72 as shown in FIG. Next, the excavation blade 73 is moved along the longitudinal direction of the guide means 72 to align the pin hole 73b with the pin engagement groove 72a at the target position. The fixing pin 74, which is a fixing means, is inserted into the pin hole 73b, and the excavating blade 73 is fixed at a target position in the longitudinal direction of the guide means 72 by striking it with a hammer or the like. is there.

  By the way, in the conventional example, since the excavation blade is fixed to the base by welding, four types of first bits having different intervals between the excavation blades are required. On the other hand, in the case of the present embodiment, the excavating blade 73 is mechanically fixed at a target position in the longitudinal direction of the guide means 72, so that one kind of pedestal 71 and the excavating blade 73 are used. Four types of first bits can be configured. Furthermore, since no welding work is required to attach the excavation blade 73 to the pedestal 71, there is no fear that the excavation blade 73 is displaced or a welding defect occurs. The diameter of the fixing pin 74 is set so as to be fitted to the inner diameter of the pin hole 73b.

  As shown in FIGS. 2A and 2B, the second bit 9 includes a rectangular pedestal 91 having a long side perpendicular to the longitudinal direction of the chain unit 6. One guide means 92, which will be described later, projects from the center of the pedestal 91 in the width direction and perpendicular to the center line of the chain unit 6 in the width direction. Excavation blade 93 described later is attached. The excavating blade 93 is attached to each end portion of the guide means 92 in the longitudinal direction.

  The guide means 92 has a configuration (a rail shape for a vehicle) in which a wide head is formed on the top of the plate-like member. A plurality of pin engaging grooves 92 a are provided in parallel on the upper surface of the guide means 92 at a predetermined interval in a direction orthogonal to the longitudinal direction of the guide means 92. The excavating blade 93 includes an engaging portion 93a including a groove through which an upper portion of the plate member of the guide means 92 passes, and a head fitting portion that is connected to the groove and into which the head is fitted. A pin hole 93b is provided in a direction orthogonal to the engaging portion 93a.

  As is well understood from the above description, the second bit 9 is different from the first bit 7 only in the shape and dimensions of the pedestal, the number of guide means, and the position of the guide means. The configuration and the configuration of the excavating blade are both the same. Accordingly, the excavating blade 93 is attached to a predetermined position of the guide means 92 by the fixing pin 94 having the same shape and the same size as the fixing pin 74 as in the case of the excavating blade 73 of the first bit 7.

When the arrangement state of the excavating blades in the width direction of the cutter chain unit 5 is seen, since the interval between the pin engaging grooves is substantially the same as the thickness of the excavating blade, as shown in FIG. Excavation blades are disposed over the entire width of the base 71 of the first bit 7. This makes it possible to excavate a continuous groove having a width corresponding to the entire width of the base 71 of the first bit 7 in the ground. By the way, as described above, the third bit 10 includes a small pedestal 101, a boss 102 provided at the center of the pedestal 101 in the width direction, and a digging blade 103 fitted to the boss 102. Has been. However, according to the second bit 9, the excavation blade 93 can be attached to the center position in the width direction of the pedestal 91, so that the third bit 10 can be replaced with the second bit 9.

Hereinafter, the operation mode of the underground continuous groove excavating apparatus 1 according to the first embodiment will be described. That is, according to the excavating blade and the bit of the underground continuous groove excavating apparatus 1, the following effects can be obtained.
(1) The excavating blades 73 and 93 can be attached to the bases 71 and 91 only by engaging the engaging portions with the guide means 72 and 92.
(2) The excavation blades 73 and 93 can be held at different positions in the width direction of the pedestals 71 and 91 by the guide means 72 and 92.
(3) Since the excavating blades having the same shape can be attached to the pedestals 71 and 91 having different shapes, the versatility of the excavating blades 73 and 93 is improved.
(4) Since the excavating blades 73 and 93 are held by the guide means 72 and 92 by the detachable fixing pins 74 and 94, a new excavating blade can be easily obtained when the excavating blades 73 and 93 are worn or damaged. 73, 93 can be exchanged.
(5) Since the excavating blades 73 and 93 can be attached at predetermined positions, even after exchanging the worn and damaged excavating blade 73.93, the same quality continuous groove is excavated with the same excavation efficiency as before the exchanging. can do.

Relates to the shape condition of the present invention, is a schematic diagram illustrating the configuration of a continuous underground excavating apparatus in a continuous excavating. Relates to the shape condition of the present invention, FIG. 2 (a) is a front view of a portion of the cutter chain, FIG. 2 (b) is a B arrow view of FIG. 2 (a), FIG. 2 (c ) Is a view in the direction of arrow C in FIG. Relates to the shape condition of the present invention, it is an exploded perspective view of the first bit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Underground continuous ditch excavator, 2 ... Running cart, 3 ... Cutter post, 4 ... Cutter chain, 5 ... Cutter chain unit, 6 ... Chain unit 7, 7a, 7b, 7c, 7d ... 1st bit, 71 ... pedestal 72 ... guide means, 72a ... pin engaging groove 7 3 ... digging edge, 73a ... engagement portion, 73b ... pin hole, 74 ... fixing pin 8 ... space holding plate 9 ... second bit, 91 ... base seat, 9 2 ... guide means, 92a ... pin engaging groove 9 3 ... digging edge, 93a ... engagement portion, 93 b ... pin hole, 94 ... fixing pins, 1 0 ... third bit, 101 ... pedestal, 102 ... Boss, 103 ... Drilling blade

Claims (3)

  A cutter post attached to the traveling carriage so as to be movable up and down, and a plurality of cutter chain units each having a bit attached to the chain unit are connected to be endless, and includes a cutter chain that is hooked on the cutter post. In the underground continuous groove excavating apparatus, the bit is a pedestal attached to the chain unit, the pedestal having a guide means projecting from the surface of the pedestal and extending in the width direction of the pedestal, and the guide means A digging blade mounted so as to be fitted from one end and a pin for fixing the digging blade to the guide means of the pedestal, and a plurality of pin engaging grooves extending in a direction orthogonal to the width direction of the pedestal on the upper surface of the guide means A guide means provided in the excavation blade with a pin hole into which the pin can be inserted and provided in parallel to each other at a predetermined interval in the width direction of The underground is characterized in that the excavation blade is fixed to the pedestal by inserting a pin into the pin hole of the excavation blade fitted and engaging with any of the plurality of pin engagement grooves. Continuous groove drilling equipment.   The bit includes a first bit and a second bit narrower than the first bit, and first guide means are provided at both ends in the width direction of the first bit, while the second bit includes the first bit. The underground continuous trench excavation apparatus according to claim 1, wherein the second guide means is provided at a position corresponding to between the pair of first guide means provided on the ground.   The underground continuous groove excavating apparatus according to any one of claims 1 and 2, wherein a distance between the pin engaging grooves is substantially the same as a thickness of the excavating blade.

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