JP5186623B2 - Concrete chipping equipment - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a chipping device for concrete, and in particular, a chipping in which a shaving machine made up of a plurality of bishans, button bits or cross bits is mounted on a compaction surface of a compacting machine which is mounted on the tip of an arm of a hydraulic excavator. It relates to the device.

  Conventionally, in the case of constructing a large-sized concrete structure, it is almost impossible to place concrete at once, and the structure is constructed while placing concrete step by step.

  When placing concrete in stages, the newly placed concrete will come into contact so that the concrete can be closely joined at the interface between the previously solidified concrete and the newly placed concrete. The surface of the solidified concrete is uneven.

  Such chipping of the solidified concrete surface to form an uneven surface is called “chipping”, but when chipping is performed, a metal fitting having a plurality of protruding pieces projecting sharply. This is done by shaving concrete.

  Generally, as a metal fitting having a projecting piece projecting sharply, a bishan used for roughing concrete is well known, and further, a button bit or a cross bit used for drilling work is used for a concrete surface. It is also known to sharpen.

  If the area of the concrete surface to be chipped is small, chipping can be done with a bishan, button bit or cross bit that can be handled by the operator. The cross bit is attached to an appropriate drive device and chipping is performed manually, but if the area of the concrete surface to be chipped is large, it takes too much time, so the operator must manually Chipping was not practical.

Therefore, when chipping on a concrete surface with a large area, a high-capacity bishan or similar chipping attachment is attached to the tip of the arm of a hydraulic excavator to increase the processing area per unit time and perform chipping. An application method has been proposed (see, for example, Patent Document 1).
JP 09-105236 A

  However, high-capacity bishans dedicated to chipping and similar chipping attachments are extremely special tools, which have caused construction costs to rise.

  In other words, construction heavy machinery is usually leased or rented, and the attachment attached to the tip of the arm of the hydraulic excavator is also leased or rented, and is a special attachment that is a special attachment, or similar chipping attachment. Has a very high lease fee or rental fee and is not frequently used, and has been an obstacle to reducing construction costs.

  In view of such a current situation, the present inventors have developed a method that can be chipped at a lower cost, and have achieved the present invention.

Chipping apparatus of the present invention is mounted on the arm tip of the hydraulic excavator, the concrete chipping apparatus for performing chipping to uneven concrete surface by cutting the concrete surface is driven by a driving force of the hydraulic excavator, the A shank support that is equipped with a number of shavings made of a bishan, button bit, or cross bit that grinds the concrete surface, and the shank support that is used for compacting the ground when the shaving support is not attached. A compacting machine that enables chipping of the concrete when a body is mounted, and a compaction plate of the compacting machine is provided with a side plate that stands upright with respect to the compaction surface of the compaction plate And providing a through hole used for mounting the shaving bracket support at a predetermined position of the side plate. The tool support includes a rectangular plate-shaped mounting portion to which the shaving bracket is mounted, a left connecting plate standing on the left edge of the mounting portion, and a right connecting plate standing on the right edge of the mounting portion. The left connecting plate and the right connecting plate are provided with a communication hole that communicates with an insertion hole provided in a side plate of the compaction plate of the compacting machine, and the communication hole and the communication hole are connected to each other. The shaving bracket support is mounted on the compacting machine by inserting a fixing bolt into the insertion hole and mounting a fixing nut .

Furthermore, the following points are also characteristic. That is,
(1) An operation pedal for adjusting the supply pressure of hydraulic oil to the compacting machine is provided on the floor surface of the operation chamber of the hydraulic excavator, and the operation pedal abuts when the operation pedal is depressed. And adjusting the height of the abutting body to adjust the vibration generating force output when the operation pedal is depressed until it abuts on the abutting body .
(2) The mounting portion of the shaving metal support is provided with a through hole through which the shaving metal can be inserted, and the shaving metal is inserted into the through hole through the brazing material. It is possible to replace the worn metal fitting for each worn metal fitting so that the metal fitting can be removed from the mounting part by welding to a part .
(3) The shaving metal fitting should be attachable to an electric hammer that an operator holds in his hand .

According to the present invention, by mounting the arm end of the hydraulic excavator, the concrete chipping apparatus for performing chipping to uneven concrete surface by cutting the concrete surface is driven by a driving force of the hydraulic excavator, said concrete A shaving support that is equipped with a plurality of shavings consisting of a bite, a button bit, or a cross bit for shaving the surface, and the shaving support that is used for compacting the ground when the shaving support is not attached. And a compacting machine that enables chipping of the concrete, and the compaction plate of the compaction machine is provided with a side plate that stands upright with respect to the compaction surface of the compaction plate In addition, an insertion hole used for mounting the shaving bracket support is provided at a predetermined position of the side plate, and the shaving bracket support is A rectangular plate-shaped mounting portion to which the shaving bracket is mounted, a left connecting plate erected on the left side edge of the mounting unit, and a right connecting plate erected on the right side edge of the mounting unit are U-shaped in a front view. The left connecting plate and the right connecting plate are provided with a communication hole that communicates with an insertion hole provided in a side plate of the compaction plate of the compacting machine, and a fixing bolt is provided in the communication hole and the insertion hole. by mounting the cutting bracket support to the compactor by mounting the insert and fixing nut, it can be the chipping apparatus using an inexpensive general-purpose machinery, low-cost chipping device Can be provided. In particular, the operating rate of the chipping device can be improved, and the cost efficiency can be improved.

  As shown in FIG. 1, the concrete chipping device of the present invention is used by being mounted on a hydraulic excavator A, and in particular, is mounted on the tip of an operating arm a1 of the hydraulic excavator A, and the operating arm a1 is attached. By appropriately operating, the chipping device a2 is brought into contact with a predetermined concrete surface to perform chipping.

  As shown in FIG. 2, the chipping device a2 is composed of a compacting machine 10 having a compaction surface 11 and a shaving support 20 that is detachably attached to the compaction surface 11 of the compaction machine 10. The shaving bracket support 20 is provided with a plurality of bishans 21 as shaving brackets.

  The compacting machine 10 is a device that is normally used for compacting the ground that has been backfilled or the like, and is connected to the hydraulic circuit of the hydraulic excavator A so as to drive the rolling surface 11 in vibration. In this embodiment, the compacting machine 10 has a maximum excitation force of 1.6 tons and a maximum vibration frequency of 2200 CPM, and the area of the rolling surface 11 is 290 × 560 mm.

  The compacting machine 10 can adjust the vibration generation force by adjusting the supply pressure of hydraulic oil with an operation pedal (not shown) provided in the operation chamber a3 of the hydraulic excavator A. Since fine adjustment is difficult in the oil supply pressure adjustment, it is almost impossible to finely adjust the excitation force. In this embodiment, the contact body with which the operation pedal comes into contact when the operation pedal is stepped on is defined as the operation chamber. It is provided in a standing manner on the floor surface of a3, and a predetermined vibration force is output by depressing until the operation pedal contacts the contact body.

  In particular, the abutment body is constituted by a bottle screwed into a nut mounted on the floor surface, and the height of the top of the bottle as the abutment body can be adjusted by rotating the bottle, and a predetermined start Adjustment is possible so that the vibration force can be output.

  In FIG. 2, reference numeral 12 denotes a connecting plate that uses the compacting machine 10 as a mounting bond at the tip of the operation arm a <b> 1, and 13 denotes a hydraulic motor that vibrates the rolling plate 14 having the rolling surface 11. The rolling plate 14 is provided with a side plate 15 standing upright with respect to the rolling surface 11, and a predetermined position of the side plate 15 is provided with an insertion hole 16 used for mounting the bracket support 20. .

  The bishan 21 that is a shaving bracket is a commercially available bishan 21 that uses a roughing bishan 21 that can be mounted on an electric hammer that an operator holds in his hand. In particular, in this embodiment, the bishan 21 is used in which a plurality of quadrangular pyramidal protrusions are provided in a 60 × 60 mm plane.

  As shown in FIGS. 3 to 5, the shaving bracket support 20 includes a rectangular plate-shaped mounting portion 20a to which the bishan 21 is mounted, a left connecting plate 20L erected on the left edge of the mounting portion 20a, and a mounting portion. The right connecting plate 20R erected on the right edge of 20a is U-shaped in front view. 3 is a bottom view of the shaving bracket support 20, FIG. 4 is a front view of the shaving support 20, and FIG. 5 is a right side view of the shaving support 20.

  The mounting portion 20a is provided with a rectangular through hole 22 through which the bishan 21 can be inserted, and the bishan 21 is inserted into the through hole 22 and welded to the mounting portion 20a.

  The welding of the Vishan 21 to the mounting portion 20a is performed through a required brazing material. By removing this brazing material, the Bishan 21 can be easily detached from the mounting portion 20a, and the Bishan 21 is attached to and detached from the mounting portion 20a. It is free.

  As shown in FIG. 3, a plurality of bishans 21 are juxtaposed along an upper outer edge 20u and a lower outer edge 20d that are parallel to each other in the mounting portion 20a. In this embodiment, the bishan 21 is arranged along the upper outer edge 20u. Four bishans 21 are provided to form a first shaving bracket row 23-1, and four bishans 21 are also provided along a lower outer edge 20d to form a second shaving row 23-2.

  As shown in FIG. 1, the first metal fitting row 23-1 and the second metal fitting row 23-2 provided in the mounting portion 20a are mounted on the compacting machine 10 and hydraulically mounted as shown in FIG. When mounted on the tip of the operation arm a1 of the excavator A, the first metal fitting row 23-1 is positioned above the second metal fitting row 23-2, and this state is shown in FIG. Thus, by chipping the surface of the concrete structure B, the surface of the concrete structure B can be continuously scraped while operating the compaction machine 10 to move up and down. It can be operated more stably and easily than moving in the left-right direction, and the surface of the concrete structure B can be chipped evenly.

  Here, in this embodiment, the concrete structure B is a dam, and the concrete is recoated so that the wall surface portion of the dam has a predetermined thickness. Thus, the solidified concrete surface before the concrete is repainted Are chipping. When chipping of a large area such as a dam is necessary, if the above-mentioned commercially available bishan 21 is mounted on an electric hammer and chipping is performed, chipping is continuously performed, for example, for 10 minutes to prevent vibration failure. The work can only be performed while taking a break for 10 minutes when it is performed, but continuous work is performed by attaching the chipping device a2 to the tip of the operation arm a1 of the excavator A as in the present invention. Therefore, work efficiency can be greatly improved.

  Moreover, in the chipping apparatus a2 of the present invention, the chipping processing area can be increased, so that the processing efficiency per unit time can be improved. Specifically, when chipping an area of 1 square meter, two workers required 60 minutes, but when using the chipping apparatus a2 of the present invention, processing can be performed in 5 minutes. It was.

  Furthermore, since the chipping device a2 of the present invention is mounted on the operation arm a1 of the hydraulic excavator A, it is possible to easily perform work at a high place where human hands cannot reach, and assembling work of a scaffold is unnecessary. Further improvement in efficiency can be achieved.

  In addition, the mounting portion 20a of the shaving bracket support 20 is provided with the first shaving row 23-1 and the second shaving row 23-2 which are separated from each other in the vertical direction, so that the first shaving row 23- Each bishan 21 constituting 1 and each bishan 21 constituting the second shaving bracket row 23-2 can be evenly brought into contact with the surface of the concrete structure B, and an extreme load is applied to some of the bishans 21. Can be prevented, and the surface of the concrete can be surely shaved by each bishan 21.

  Furthermore, since each bishan 21 is detachably attached to the mounting portion 20a, the mounting portion 20a can be used by replacing only the worn bishan 21 as appropriate, so that the maintenance cost can be reduced.

  In particular, the chipping device a2 of the present invention can be driven with a relatively large vibration force, so that the concrete can be sufficiently scraped even if the bishan 21 is somewhat worn. Therefore, the bishan 21 is not necessarily new, and the bishan 21 used for other purposes may be used.

  When attaching the bishan 21 to the mounting portion 20a, the shank support 20 is arranged with the surface of the mounting portion 20a facing down, and the surface of the bishan 21 is projected from the surface of the mounting portion 20a by a predetermined dimension. The mounting portion 20a is floated by the protruding dimension, the bishan 21 is inserted into each through hole 22, and the bishan 21 is welded using a brazing material. The rear end portion of the bishan 21 protruding to the back side of the mounting portion 20a is cut off.

  As shown in FIGS. 4 and 5, the right connecting plate 20R and the left connecting plate 20L of the shaving bracket support 20 communicate with the insertion holes 16 provided in the side plate 15 of the compaction plate 14 of the compacting machine 10. A communication hole 24 is provided at a predetermined position.

  When mounting the shank support 20 to the compacting machine 10, fit the shank support 20 to the compacting machine 10 so that the communication hole 24 communicates with the insertion hole 16, and insert it into the communicating communication hole 24. A fixing bolt is inserted into the hole 16 and a fixing nut is attached to the fixing bolt so that the fixing bolt is firmly attached via the fixing bolt.

  Note that an appropriate washer is interposed between the shaving bracket support 20 and the rolling plate 14 of the compacting machine 10 to adjust the gap.

  Further, an elastic sheet such as a rubber sheet is interposed between the mounting portion 20a of the shank support 20 and the compaction surface 11 of the compaction plate 14, so that the metal shank support 20 and the compaction plate 14 are provided. Prevents direct damage and damage.

  Since the chipping device a2 of the present invention can be used as the compacting machine 10 by removing the metal fitting support 20 when not in use, the operating rate of the compacting machine 10 can be improved, and in terms of cost. The efficiency can be improved.

  As another embodiment, as shown in FIG. 3, the Bishan 21 is arranged in parallel along the upper outer edge 20u and the lower outer edge 20d, which are parallel to each other, so that the first shavings in two rows of the mounting portion 20a are arranged. As shown in FIG. 7, not only when the metal fitting row 23-1 and the second metal fitting row 23-2 are formed, but also between the first metal fitting row 23-1 and the second metal fitting row 23-2. An intermediate shaving metal fitting 21 'may be provided in the portion.

  In the present embodiment, the intermediate shaving metal fitting 21 ′ is a longitudinal bishan, and is arranged in parallel with the first shaving metal fitting row 23-1 and the second shaving fitting row 23-2.

  When the intermediate shaving metal fitting 21 ′ is thus provided, the processing area per unit time can be increased, and the efficiency of the chipping process can be improved.

  In addition, it is not limited to the case where one intermediate shaving metal fitting 21 'having a longitudinal shape is provided in an intermediate portion between the first shaving metal fitting row 23-1 and the second shaving metal fitting row 23-2. As shown, the same Vishan 21 as the Vishan 21 constituting the first metal fitting row 23-1 and the second metal fitting row 23-2 is replaced with the first metal fitting row 23-1 and the second metal fitting row 23-2. A plurality of intermediate metal fitting rows 23-3 may be formed in parallel with each other.

  Furthermore, as shown in FIG. 8, not only the intermediate portion between the first metal fitting row 23-1 and the second metal fitting row 23-2, but the bishan 21 may be arranged at any other appropriate position. In some cases, a bishan 21 may be disposed on the entire surface of the mounting portion 20a as shown in FIG. In particular, the number of the protruding pieces and the shape of the bishan 21 may be different depending on the arrangement position. For example, a bishan having a small number of protruding pieces is arranged in the central portion of the mounting portion 20a, and the center of the mounting portion 20a is arranged. The number of protruding pieces may be gradually increased as the distance from is increased, or vice versa.

  As another embodiment, as shown in FIG. 10, a button bit 26 may be attached to the shaving bracket support 20 instead of the bishan 21. In this embodiment, a φ90 mm button bit 26 is used.

  The button bit 26 is a metal fitting for drilling used when drilling a predetermined hole in concrete, and as shown in FIGS. 11 to 13, a plurality of hard tips 26a are provided in a protruding shape at the tip portion. A predetermined hole can be drilled in the concrete by using the button bit 26 at the tip of the rotary drill. 11 is a bottom view of the shaving bracket support 20, FIG. 12 is a front view of the shaving support 20, and FIG. 13 is a right side view of the shaving support 20.

  By using the button bit 26 as a bishan, the surface of the concrete can be shaved with a hard tip 26a so as to be uneven. In particular, the button bit 26 does not need to be new, and the hard tip 26a may be worn to some extent.

  When the button bit 26 is attached to the attachment portion 20a, as in the case of the bishan 21, the attachment portion 20a has a circular shape that allows the button bit 26 to be inserted at a predetermined position as shown in FIGS. The through hole 27 is provided, the button bit 26 is inserted into the through hole 27, and the button bit 26 is welded to the mounting portion 20a. The rear end portion of the button bit 26 protruding to the back side of the mounting portion 20a is cut and removed.

  The welding of the button bit 26 to the mounting portion 20a is also performed through the required brazing material, and by removing this brazing material, the button bit 26 can be easily detached from the mounting portion 20a, and the button bit 26 is attached to the mounting portion. 20a is detachable.

  As shown in FIG. 11, a plurality of button bits 26 are juxtaposed along the upper outer edge 20u and the lower outer edge 20d that are parallel to each other in the mounting portion 20a. In this embodiment, the button bit 26 is arranged along the upper outer edge 20u. To form a first shank row 28-1 with two button bits 26, and to form a second shank row 28-2 with three button bits 26 along the lower outer edge 20d. ing.

  As shown in FIG. 10, the first shank bracket row 28-1 and the second shank bracket row 28-2 provided in the mounting portion 20a are mounted on the compacting machine 10 and hydraulically mounted as shown in FIG. When mounted on the tip of the operation arm a1 of the excavator A, the first metal fitting row 28-1 is positioned above the second metal fitting row 28-2. In this state, the concrete structure By chipping the surface, the surface of the concrete structure can be scraped continuously while operating the compactor 10 to move up and down, which is more stable than moving the compactor 10 left and right Can be operated efficiently and easily, and the surface of the concrete structure can be chipped evenly.

  Further, in the present embodiment, an intermediate button bit 26 'is provided at an intermediate portion between the first metal fitting row 28-1 and the second metal fitting row 28-2. Thus, by providing the intermediate button bit 26 ′ in the mounting portion 20a, the processing area per unit time can be expanded, and the efficiency of the chipping process can be improved. Further, it is possible to easily balance the load of the metal brace support 20 to which the button bit 26 and the intermediate button bit 26 ′ are attached, and it is possible to prevent the operability from being lowered in the operation of the operation arm a1 of the excavator A.

  The arrangement of the button bits 26 is not limited to the above-described arrangement, and may be arranged, for example, in 3 rows and 3 columns, or in a zigzag pattern. In particular, when the button bits 26 are arranged in a zigzag pattern, the non-chipping area generated between the button bits can be reliably chipped with the movement of the chipping device a2, and uniform chipping can be performed.

  As shown in FIGS. 12 and 13, the shaving bracket support 20 includes a rectangular plate-shaped mounting portion 20a to which the button bit 26 is mounted, a left connecting plate 20L erected on the left edge of the mounting portion 20a, The right connecting plate 20R standing on the right edge of the mounting portion 20a is U-shaped in front view, and the side plates of the compaction plate 14 of the compacting machine 10 are located at predetermined positions of the left connecting plate 20L and the right connecting plate 20R. A communication hole 29 communicating with the insertion hole 16 provided in 15 is provided.

  When mounting the shank support 20 to the compacting machine 10, fit the shank support 20 to the compacting machine 10 so that the communication hole 29 communicates with the insertion hole 16, and insert it into the communicating hole 24. A fixing bolt is inserted into the hole 16 and a fixing nut is attached to the fixing bolt so that the fixing bolt is firmly attached via the fixing bolt. Therefore, the shaving bracket support 20 can be easily attached to and detached from the compacting machine 10.

  As described above, the chipping device a2 using the button bit 26 instead of the bishan 21 was able to process in 15 minutes when chipping an area of 1 square meter.

  As another embodiment, as shown in FIGS. 14 and 15, a cross bit 31 may be attached to the shaving bracket support 20 instead of the bishan 21 and the button bit 26. In this embodiment, a φ90 mm cross bit 31 is used. FIG. 14 is a bottom view of the shaving bracket support 20 and FIG. 15 is a front view of the shaving support 20.

  The cross bit 31 is also a perforation fitting used when drilling a predetermined hole in concrete, and as shown in FIG. 14, a plurality of hard tips 31a having a cross-sectional mountain shape are radially arranged at the tip portion. A predetermined hole can be drilled in the concrete by using the cross bit 31 attached to the tip of an appropriate rotary drill.

  By using the cross bit 31 as a bishan, the surface of the concrete can be shaved with a hard tip 31a to be uneven. In particular, the cross bit 31 does not need to be new, and the hard tip 31a may be worn to some extent. When the hard tip 31a is worn to a certain extent, it can be reused by polishing the tip portion of the hard tip 31a and can be used any number of times.

  When the cross bit 31 is mounted on the mounting portion 20a, as in the case of the bishan 21, the mounting portion 20a has a circular through hole that allows the cross bit 31 to be inserted into a predetermined position as shown in FIG. 32 is provided, and the cross bit 31 is inserted into the through hole 32, and the cross bit 31 is welded to the mounting portion 20a. The rear end portion of the cross bit 31 protruding to the back side of the mounting portion 20a is cut and removed.

  Welding to the mounting part 20a of the cross bit 31 is also performed through a required brazing material, and by removing this brazing material, the cross bit 31 can be easily removed from the mounting part 20a, and the cross bit 31 is attached to the mounting part. 20a is detachable.

  As shown in FIG. 14, a plurality of button bits 26 are juxtaposed along the upper outer edge 20u and the lower outer edge 20d that are parallel to each other in the mounting portion 20a. In the present embodiment, the button bit 26 extends along the upper outer edge 20u. The three cross bits 31 are provided side by side to form the first shaving bracket row 33-1, and the three cross bits 31 are also provided along the lower outer edge 20d to form the second shaving row 33-2. ing.

  Further, in the present embodiment, the first shank row 33- is an intermediate portion between the first shaving row 33-1 and the second shaving row 33-2, and closer to the first shaving row 33-1. Two cross bits 31 are provided in parallel to 1 to form a first intermediate metal fitting row 34-1 and two parallel to the second metal fitting row 33-2 are arranged in the vicinity of the second metal fitting row 33-2. A cross bit 31 is also provided to form a second intermediate sharpener row 34-2.

  In addition, the two cross bits 31 constituting the first intermediate shank row 34-1 are arranged in a staggered manner with respect to the three cross bits 31 constituting the first shank row 33-1, and the second intermediate shavings are arranged. The two cross bits 31 constituting the metal fitting row 34-2 are also arranged in a staggered manner with respect to the second metal fitting row 33-2, between the cross bits 31 in the first metal fitting row 33-1 and the first The unprocessed area generated between the cross bits 31 in the two metal fittings row 33-2 is easily detected by the cross bit 31 in the first intermediate metal fitting row 34-1 and the cross bit 31 in the second intermediate metal fitting row 34-2. Chipping is possible.

  As described above, the mounting area 20a is provided with the first intermediate shank bracket row 34-1 and the second intermediate shank bracket row 34-2, so that the processing area per unit time can be increased and the efficiency of the chipping process can be increased. Can be improved.

  As shown in FIG. 14, the shaving bracket support 20 includes a rectangular plate-shaped mounting portion 20a to which the cross bit 31 is mounted, and a left connecting plate erected on the left edge of the mounting portion 20a as shown in FIG. 20L and the right connecting plate 20R erected on the right edge of the mounting portion 20a are U-shaped in front view, and the rolling plate 14 of the compacting machine 10 is positioned at predetermined positions of the left connecting plate 20L and the right connecting plate 20R. A communication hole 29 communicating with the insertion hole 16 provided in the side plate 15 is provided.

  When mounting the shank support 20 to the compacting machine 10, fit the shank support 20 to the compacting machine 10 so that the communication hole 29 communicates with the insertion hole 16, and insert it into the communicating hole 24. A fixing bolt is inserted into the hole 16 and a fixing nut is attached to the fixing bolt so that the fixing bolt is firmly attached via the fixing bolt. Therefore, the shaving bracket support 20 can be easily attached to and detached from the compacting machine 10.

It is explanatory drawing of the hydraulic excavator equipped with the chipping apparatus which concerns on embodiment of this invention. It is explanatory drawing of the compacting machine used as a chipping apparatus. It is a bottom view of a shaving metal support. It is a front view of a shaving metal support. It is a right view of a shaving metal support. It is use condition explanatory drawing of the chipping apparatus which concerns on embodiment of this invention. It is a bottom view of the shaving metal support body of the modification example. It is a bottom view of the shaving metal support body of the modification example. It is a bottom view of the shaving metal support body of the modification example. It is explanatory drawing of the hydraulic excavator equipped with the chipping apparatus of other embodiment. It is a bottom view of the shaving metal support body of other embodiment. It is a front view of the shaving bracket support body of other embodiment. It is a right view of the shaving bracket support body of other embodiment. It is a bottom view of the shaving metal support body of other embodiment. It is a front view of the shaving bracket support body of other embodiment.

Explanation of symbols

A Hydraulic excavator
a1 Operation arm
a2 Chipping device
a3 Operation room
10 Compaction machine
11 Rolling surface
12 Connecting plate
13 Hydraulic motor
14 Rolling plate
15 Side plate
16 Insertion hole
20 Sharpener support
20a mounting part
20L left connection plate
20R Right connecting plate
20u Upper outer edge
20d lower outer edge
21 Bishan
22 Through hole
23-1 First sharpener row
23-2 Second sharpener row
24 communication hole

Claims (4)

In a chipping apparatus for concrete that is mounted on the tip of an arm of a hydraulic excavator and performs chipping to make the concrete surface uneven by driving the driving force of the hydraulic excavator and cutting the concrete surface,
A shaving metal support that is provided with a plurality of shavings made of a bishan, a button bit, or a cross bit for shaving the concrete surface;
A compacting machine that enables chipping of the concrete when the shaving bracket support is mounted, while being used for compacting the ground when the shaving bracket support is not mounted,
The compaction plate of the compacting machine is provided with a side plate that stands upright with respect to the compaction surface of the compaction plate, and an insertion hole that is used for mounting the shaving bracket support at a predetermined position of the side plate. Provided,
The shaving bracket support includes a rectangular plate-shaped mounting portion to which the shaving bracket is mounted, a left connecting plate standing on the left edge of the mounting portion, and a right connecting plate standing on the right edge of the mounting portion. With a U-shape in front view,
The left connection plate and the right connection plate are provided with a communication hole that communicates with an insertion hole provided in a side plate of the compaction plate of the compacting machine,
A chipping apparatus for concrete , wherein the shank support is mounted on the compacting machine by inserting a fixing bolt into the communicating hole and the insertion hole that are communicated and mounting a fixing nut . On the floor surface of the operation chamber of the hydraulic excavator, an operation pedal for adjusting the supply pressure of the hydraulic oil to the compacting machine is provided, and a contact body with which the operation pedal comes into contact when the operation pedal is depressed is provided. ,
2. The concrete according to claim 1, wherein an excitation force output when the operation pedal is stepped on is adjusted by adjusting a height of the contact body until the contact body contacts the contact body. Chipping device. The mounting portion of the shaving bracket support is provided with a through hole through which the shaving bracket can be inserted, and the shaving bracket is inserted into the through hole and the shaving bracket is welded to the mounting portion via a brazing material. by, as the cutting bracket removable from the mounting portion, for concrete chipping apparatus of claim 1 or claim 2, characterized in that it is made replaceable for each of the cutting fixture worn. 4. The concrete chipping device according to claim 3 , wherein the shaving metal fitting is attachable to an electric hammer that an operator holds in his / her hand .

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