Demolition blower device and method for demolition of anchoring grooves in open channel blocks using the same.

Abstract

This invention provides a concrete chipping blower device that can be used to blow away dust generated when chipping concrete, thereby improving the efficiency of concrete chipping work. [Solution] The concrete chipping blower device 1, which blows away dust generated by chipping concrete, comprises a trolley body 5 having front wheels 3,3 and rear wheels 4,4, a blower body 6 provided on the trolley body 5 for blowing away concrete dust, and an angle adjustment means 8 that can adjust the direction of the outlet 7 of the blower body 6 in the vertical direction. This allows the trolley body 5 to be fixed in position with the direction of the outlet 7 aligned with the chipping location, and after setting it to a blowing state, the concrete can be chipped using a cutting tool or the like. This makes it possible to perform the work that previously required multiple people to operate the blower body 6 and chip the concrete, with just one person.

Description

Technical Field

[0006]

[0001] The present invention relates to a blower device for chiseling and a method for chiseling a fixing groove in a canal block using the same.

Background Art

[0002] Conventionally, as a device for removing dust generated by chiseling concrete, for example, there is an air injection device (for example, Patent Document 1) mounted on a trolley having traveling wheels and equipped with a generator serving as a power source and an air compressor for generating high-pressure air.

[0003] In this air injection device, conventionally, to repair a damaged road surface, a chiseling operation is performed to blow off the road surface with high-pressure water by a water jet, and then a paving material such as concrete is constructed thereon. In the air injection device, high-pressure air is injected onto the chiseled road surface after the chiseling operation, and the dust of the concrete is moved and removed by the injection pressure. Also, in the case of concrete structures other than roads, when only the surface is deteriorated, the surface may be chiseled and a new surface may be formed by on-site cast concrete or precast concrete slabs.

[0004] Also, as a device for blowing off the dust of a concrete member generated by a chiseling operation, a portable blower that ejects air, having a main body portion incorporating a fan for sucking and ejecting air and a drive portion for driving the fan, and a portable blower having a blower pipe attached to the main body portion (for example, Patent Document 2) may be used.

[0005] When chiseling a concrete member with a tool in this way, at least a plurality of workers are required, including a worker who performs the chiseling operation and a worker who operates a portable blower for blowing off the dust of the concrete generated by the chiseling.

[0006] Incidentally, in addition to cases where the entire surface of a concrete member is chipped away, there are also cases where it is chipped away partially to form grooves or holes. For example, there is a connecting structure in which open channel blocks, which are concrete members having a base plate and side walls, are connected using a strip-shaped waterproof rubber, and a circumferentially continuous anchoring groove is formed on the inner circumferential surface on the inner side of the end faces on both axial sides of the open channel block, the waterproof rubber has a width greater than the distance between the anchoring grooves of both adjacent open channel blocks, and has anchors on the back sides on both sides in the width direction that are fixed to the anchoring groove, and extends continuously from the inner circumferential surface of the opposing side walls and the inner circumferential surface of the base plate, straddling the ends of adjacent open channel blocks, and is inserted into each anchoring groove at the anchors on both sides in the width direction, and connects the two open channel blocks in a loose state between adjacent open channel blocks in the middle part in the width direction (for example, Patent Document 3).

[0007] Furthermore, by applying the technology of the aforementioned connecting structure, if the joint area deteriorates in the open channel block without the water-stopping rubber and anchoring groove, an anchoring groove can be chipped and formed on-site, and adjacent open channel blocks can be connected with the water-stopping rubber. In this case, it can be applied to connecting existing open channel blocks that do not have anchoring grooves.

[0008] To achieve this, tools having a rotating processing part, such as a handle-type concrete cutter or a disc grinder (for example, Patent Document 4), are used, and multiple rotating processing parts are attached to correspond to the width of the fixing groove. The fixing groove is then chipped away and formed on-site, and the dust generated during this process is blown away with the portable blower. This allows the open channel blocks without fixing grooves to be connected to each other by the water-stopping rubber.

[0009] Incidentally, even in the groove cutting work for anchoring grooves using the above-mentioned tools, one worker holds the tool and cuts the groove, while another worker holds a portable blower and directs the tip of the blower's air pipe towards the chipping area to blow away the generated dust. As the tool moves, the portable blower is also moved, and as the chipping work moves from the inner surface of the base plate to the inner surface of the side wall, the direction of the portable blower is changed as it moves. Therefore, it is necessary to have at least two people working simultaneously, and there was a desire to improve the efficiency of the work. [Prior art documents] [Patent Documents]

[0010] [Patent Document 1] Japanese Patent Publication No. 2003-34916 [Patent Document 2] Japanese Patent Publication No. 2014-101743 [Patent Document 3] Japanese Patent Publication No. 2003-193547 [Patent Document 4] Japanese Patent Application Publication No. 9-192977 [Overview of the project] [Problems that the invention aims to solve]

[0011] Therefore, in view of the above-mentioned problems, the present invention aims to provide a concrete chipping blower device that can be used to blow away dust generated by chipping concrete, thereby improving the efficiency of concrete chipping work, and a method for chipping anchorage grooves in open channel blocks using the same. [Means for solving the problem]

[0012] To achieve the above objective, the invention according to claim 1 is a concrete chipping blower device for blowing away dust generated by chipping concrete, characterized by comprising: a trolley body having wheels for movement; a blower body provided on the trolley body for blowing away the dust from the concrete; and an angle adjustment means that can adjust the direction of the outlet of the blower body in the vertical direction.

[0013] The invention according to claim 2 is characterized in that the direction of the outlet of the blower body can be adjusted from diagonally downward to diagonally upward.

[0014] The invention according to claim 3 is characterized in that the wheels for movement are front wheels and rear wheels, and at least one of these front wheels and rear wheels is provided with a locking mechanism for locking rotation.

[0015] The invention according to claim 4 is characterized in that the angle adjustment means comprises a tilting part to which the blower body is fixed and which tilts up and down in the front and rear directions around a pivot in the left and right lateral direction, a guide part provided on the tip side of the tilting part, an arc groove centered on the pivot with which the guide part engages, and a fixing means for positioning and fixing the guide part in the arc groove.

[0016] The invention according to claim 5 is a method for chipping away at the anchoring groove of an open channel block, in which an open channel block having a base plate and side walls is connected by a strip-shaped waterproof rubber, and an anchor provided on the waterproof rubber is inserted into an anchoring groove formed on the inner circumferential surface of the concrete of the open channel block, wherein the chipping blower device according to claim 2 is used, and in order to blow away the dust generated when forming the anchoring groove with a cutting tool, the trolley body is fixed in position with the outlet facing the location where the anchoring groove is to be formed, and then the anchoring groove is formed in a predetermined range, and thereafter the trolley body is fixed in position with the outlet facing the next predetermined range where the anchoring groove is to be formed, and then the anchoring groove is formed in the next predetermined range.

[0017] The invention according to claim 6 is characterized in that when the trolley body is moved on the inner circumferential surface of the base plate and the fixing groove is formed on the inner circumferential surface of the base plate, the outlet is directed diagonally downward, and when the fixing groove is formed on the upper side of the inner circumferential surface of the side wall, the outlet is directed diagonally upward. [Effects of the Invention]

[0018] According to the configuration of claim 1, the trolley body can be fixed in place with the direction of the air outlet aligned with the location of the chipping site, and after setting it to a blowing state, the concrete can be chipped using a cutting tool or the like. This makes it possible to perform the work, which previously required multiple people to operate the blower body and chip the concrete, by one person.

[0019] According to the configuration of claim 2, by making the air outlet face obliquely downward with respect to a position lower than the blower main body and obliquely upward with respect to a position higher than the blower main body, the blower main body can be used for both the chiseling operation on the horizontal concrete surface and the chiseling operation on the vertical concrete surface.

[0020] According to the configuration of claim 3, the moving wheels can be locked by the locking means to fix the position of the carriage main body, and air can be blown in this state.

[0021] According to the configuration of claim 4, when the position fixing by the fixing means is released, the guide part can move along the arc groove, and by changing the angle of the tilting part around the pivot, the vertical direction of the blower main body fixed to the tilting part can be changed continuously to adjust the vertical angle of the air outlet. The tilting part can be stably attached to and positioned on the carriage main body at two positions, namely, the front and rear positions of the pivot and the guide part on the tip side of the tilting part engaged with the arc groove.

[0022] According to the configuration of claim 5, in order to connect the open-channel blocks to each other with a strip-shaped water-stop rubber, when a fixing groove is chiseled and formed on the inner peripheral surface of the open-channel block, by alternately performing the setting operation of the chiseling blower device and the chiseling operation with a cutting tool, it becomes possible to perform the work alone.

[0023] According to the configuration of claim 6, the direction of the air outlet is set and used according to the chiseling position of the fixing groove. In the chiseling operation on the inner peripheral surface of the vertical side wall, by making the air outlet face obliquely upward, the chiseling blower device can be placed on the bottom plate and air can be blown onto the inner peripheral surface of the side wall to blow away the concrete dust without placing the chiseling blower device on a high platform or lifting it.

Brief Description of the Drawings

[0024] [Figure 1] It is a perspective view of a blower device in a state where the air outlet is maximally downward, showing Embodiment 1 of the present invention. [Figure 2] Similarly, it is a perspective view of a blower device in a state where the air outlet is maximally upward. [Figure 3] The same as above, this is a perspective view of the angle adjustment mechanism. [Figure 4] The same as above, this is a perspective view of the blower unit from the front. [Figure 5] The same as above, this is a perspective view of the connecting structure of open channel blocks, with a portion of it shown in cross-section. [Figure 6] The same as above, this is a side view of the front of the tilting section, with the guide section shown in cross-section. [Figure 7] The same as above, this is a cross-sectional view of the connecting structure of the open channel blocks. [Figure 8] The same as above, this is a side view of the main part of the cutting tool. [Figure 9] The above is an explanatory diagram showing the process of forming fixing grooves in the base plate. [Figure 10] The above is an explanatory diagram showing the process of forming a fixing groove in the side wall.

[0025] Preferred embodiments of the present invention will be described with reference to the accompanying drawings. Note that the embodiments described below do not limit the scope of the present invention as defined in the claims. Furthermore, not all of the configurations described below are essential requirements of the present invention. [Example 1]

[0026] Figures 1 to 10 show Embodiment 1 of the present invention. As shown in Figures 1 to 5, the concrete chipping blower device 1 comprises a trolley body 5 with a pair of left and right front wheels 3, 3 and a pair of left and right rear wheels 4, 4 on the lower surface of a substantially rectangular plate-shaped base portion 2; a blower body 6 mounted on the trolley body 5 for blowing away dust generated by chipping concrete; and an angle adjustment means 8 that can adjust the direction (blow angle) of the cylindrical outlet 7 of the blower body 6 in the vertical direction. The blow angle is approximately +35 degrees or less and -35 degrees or more relative to the horizontal, and the blow angle can be set steplessly within the range of 35 degrees upward from the horizontal and 35 degrees downward from the horizontal. The trolley body 5 and the angle adjustment means 8 are made of metal.

[0027] The front wheel 3 and rear wheel 4 are wheels for transport. The front wheel 3 has a U-shaped frame 11 connected to the lower surface of the base portion 2 so as to be rotatable around a vertical axis, and the rear wheel 4 has a U-shaped frame 11 fixed in a front-to-back direction, with the wheel body 12 pivotally supported within the frame 11 so as to be rotatable around a horizontal axis.

[0028] Furthermore, the left and right front wheels 3, 3 are provided with locking means 13 on the frame 11 that can lock and unlock the rotation of the wheel body 12. The lock lever 14 of the locking means 13 provided on the frame 11 can be used to lock and unlock the rotation of the wheel body 12 of the front wheels 3. The locking means 13 can be of a type that, when the lock lever 14 is operated, abuts against the outer circumferential surface or side surface of the wheel body 12 of the front wheels 3 to lock the rotation of the wheel body 12.

[0029] The blower unit 6 comprises a main body case 22 with a built-in blower fan 21, an intake port 23 opening on the side of the main body case 22, an outlet port 7 connected to the front of the main body case 22, consisting of a tapered cylindrical body with an outlet opening 7K at the tip of its tip portion 7S, and a drive unit (not shown) built into the main body case 22 that drives the blower fan 21 using a power supply. Power is supplied to the drive unit by a power cord 24. A handle 25 (Figure 1), which serves as a gripping portion, is provided at the rear of the main body case 22.

[0030] The blower body 6 is attached to the base portion 2 of the trolley body 5 by the angle adjustment means 8. The angle adjustment means 8 comprises a tilting frame 32 with a U-shaped cross-section, which is a tilting part to which the main body case 22 is fixed by a fixing band 31; two integrated left and right support columns 33, 33 erected from the upper surface of the base portion 2 so as to sandwich the tilting frame 32 from the left and right; a pair of these left and right support columns 33, 33; and a bolt 34 which is a pivot in the left and right direction inserted through the left and right side plates 32S, 32S of the tilting frame 32 and the left and right support columns 33, 33. The tilting frame 32 is connected to the left and right support columns 33, 33 by this bolt 34 so as to be able to tilt up and down around the bolt 34. Furthermore, nuts 35, 35 are screwed onto the female threaded portions 34M, 34M at the end of the bolt 34, and the bolt 34 is attached to the support columns 33, 33. The tilting frame 32 also comprises an upper plate portion 32J which is the upper surface to which the blower body 6 is attached, and side plate portions 32S, 32S which are suspended downward from the left and right edges of the upper plate portion 2J.

[0031] Furthermore, the angle adjustment means 8 has left and right plate-shaped guide members 36, 36 protruding from the front side of the left and right support columns 33, 33, at positions that sandwich the tilting frame 32, and arc grooves 37 centered on the bolt 34 are drilled in these left and right guide members 36, 36, and a guide shaft 38 is provided on the front side, which is the tip side of the tilting frame 32, with both ends inserted through these left and right arc grooves 37, the guide shaft 38 is inserted through the left and right side plate portions 32S, 32S, and the ends of the guide shaft 38 that are inserted through the arc grooves 37, 37 are the guide portions 39, 39.

[0032] Furthermore, nuts 41, 41, which serve as fixing means, are screwed into the female threaded portions 38M, 38M (Figure 3) provided at both ends of the guide shaft 38. These nuts 41 are wing nuts having a pair of gripping portions. When the nuts 41 are screwed in, they press against the outer edge of the arcuate groove 37, fixing the guide portion 39 in position relative to the arcuate groove 37.

[0033] Then, with the nut 41 loosened, the tilting frame 32 is rotated at an angle so that the outlet 7 of the blower body 6 faces downward, and when the guide portion 39 of the guide shaft 38 comes into contact with or is close to the lower edge of the arc groove 37, the nut 41 is tightened, fixing the tilting frame 32 in place and fixing the outlet 7 of the blower body 6 in the position where it is facing as far downward as possible (Figure 1).

[0034] Furthermore, the front portions of the left and right side plates 32S, 32S are provided with slanted front contact edges 32F, 32F, which are cut out at the front corners. As shown in Figure 5, when the outlet 7 of the blower body 6 is pointed as far downward as possible, the left and right contact edges 32F, 32F come into contact with the upper surface of the base portion 2. This contact suppresses vibrations at the front end of the tilting frame 32, allowing the blower body 6 to be driven stably. At the position where the left and right contact edges 32F, 32F come into contact with the upper surface of the base portion 2, the guide portion 39 of the guide shaft 38 comes into contact with or is close to the lower edge of the arc groove 37.

[0035] By loosening the nut 41 from here and rotating the front side of the tilting frame 32 upward around the bolt 34, the guide shaft 38 moves along the arc groove 37, allowing the vertical angle of the air outlet 7 to be changed. By tightening the nut 41 at the desired position, the air outlet 7 can be fixed in the desired orientation. The position where the guide portion 39 of the guide shaft 38 abuts against or is close to the upper edge of the arc groove 37 is the position where the air outlet 7 of the blower body 6 is pointed as far upward as possible (Figure 2).

[0036] Furthermore, the rear portions of the left and right side plates 32S, 32S are provided with angled rear contact edges 32T, 32T, which have a cut-out lower corner. As shown in Figure 2, when the outlet 7 of the blower body 6 is facing upward to its maximum extent, the left and right contact edges 32T, 32T contact the upper surface of the base portion 2. This contact suppresses the generation of vibrations at the rear end of the tilting frame 32, allowing the blower body 6 to be driven stably. At the position where the left and right contact edges 32T, 32T contact the upper surface of the base portion 2, the guide portion 39 of the guide shaft 38 contacts or is close to the upper edge of the arc groove 37.

[0037] Next, an example of the use of the demolition blower device 1 will be described. In the process of connecting adjacent open channel blocks 51, 51 by using a strip-shaped waterproof rubber 52 and inserting an anchor 53 provided on the waterproof rubber 52 into a fixing groove 55 formed in the concrete inner surface 54 of the open channel block 51, the demolition blower device 1 is used to blow away dust generated when the fixing groove 55 is formed with a cutting tool 56. This is used for connecting existing or newly installed open channel blocks 51, 51 that do not have a fixing groove 55.

[0038] As shown in Figures 6 and 7, the open channel block 51 integrally comprises a concrete base plate 61 and left and right side walls 62, 62 rising from the left and right sides of the base plate 61. On the inner circumferential surface 54 at the rear, away from the end faces 63 on both sides in the longitudinal direction of the open channel block 51, a fixing groove 55 is formed that extends over the entire width of the base plate 61 and the entire height of the side walls 62, 62, or to the vicinity of the top of the side wall 62, and is continuous in the circumferential direction of the open channel block 51.

[0039] In Figure 6, a fixing groove 55 is formed up to the top of the side wall 62 and a waterproof rubber 52 is laid. However, the upper end of the waterproof rubber 52 only needs to be above the water level expected when the open channel block 51 is in use, so it is not necessarily required to form a fixing groove 55 up to the top of the side wall 62 and lay the waterproof rubber 52.

[0040] In Figures 6 and 7, the fixing groove 55 is formed in a shape in which the width of the inner circumferential surface 54 of the base plate 61 and side wall 62 decreases in the depth direction from the surface, in order to facilitate the insertion and removal of the water-sealing rubber 52 when replacing it, but this is not always necessary.

[0041] The waterproof rubber 52 has a width greater than the distance between the anchoring grooves 55, 55 of both adjacent open channel blocks 51, 51 in the width direction, and its total length extends from at least the top of one side wall 62 or its vicinity, through the base plate 61, to the top of the other side wall 62 or its vicinity, and is laid continuously and seamlessly from the top of one side wall 62 or its vicinity to the top of the other side wall 62 or its vicinity.

[0042] Anchors 53, 53 are formed on the back sides of both sides in the width direction of the waterproof rubber 52, which are fixed to the fixing grooves 55, 55, and a plurality of anchor lips 53A are provided on both sides of each anchor 53 that are in close contact with the inner circumferential surface of the fixing groove 55.

[0043] The waterproofing rubber 52 spans between the end faces 63, 63 of adjacent open channel blocks 51, 51, either with a clearance or in close contact, and each anchor 53 is inserted into the anchoring groove 55 of each open channel block 51. The waterproofing rubber 52 maintains its anchored state in the anchoring groove 55 due to the elasticity of the multiple anchor lips 53A when they contract. Since the waterproofing rubber 52 maintains its anchored state by elasticity, it is mainly molded from chloroprene rubber, butyl rubber, silicone rubber, or other gasket-type sealing materials with high resilience.

[0044] Figures 6 and 7 show the state in which the anchor 53 is inserted into the anchoring groove 55, but in particular they show the relationship between the state of the anchor lip 53A and the anchoring groove 55 before the anchor 53 is inserted into the anchoring groove 55. As shown in Figures 6 and 7, in order for the elasticity of the anchor lip 53A to be exerted, the distance between the tips of the anchor lips 53A, 53A on both sides of the anchor 53 is greater than the inner dimensions of the anchoring groove 55, and the anchor lips 53A, 53A contract when the anchor 53 is inserted into the anchoring groove 55.

[0045] When the waterproofing rubber 52 is fixed in the fixing grooves 55, 55, the widthwise middle portion of the waterproofing rubber 52 becomes loose between adjacent open channel blocks 51, 51. The length of this loose portion 52A in the widthwise middle portion, i.e., the excess length, is given to account for the change in the distance between the end faces 63, 63 due to the assumed relative displacement between the open channel blocks 51, 51. The waterproofing rubber 52 can be molded with the widthwise middle portion either tight or loose, but the latter is preferable in terms of ease of installation.

[0046] Figure 7 shows an example of connecting open channel blocks 51, 51 with a waterproof rubber seal 52. Laying grooves 64 are formed on the inner circumferential surfaces 54 of the base plate 61 and side walls 62, which are the mounting surfaces for the waterproof rubber seal 52, so as not to obstruct water flow when the waterproof rubber seal 52 is installed. The waterproof rubber seal 52 is laid in the laying grooves 64 so that its surface is flush with, or nearly flush with, the inner circumferential surfaces 54 of the base plate 61 and side walls 62. A clearance is ensured between the end faces of the laying grooves 64 and both ends of the waterproof rubber seal 52 in the width direction to account for expansion and deformation of the waterproof rubber seal 52 and to prevent the waterproof rubber seal 52 from protruding from the laying grooves 64. Note that in Figures 6 and 7, a clearance is provided between the end faces 63, 63 of the open channel blocks 51, 51.

[0047] As shown in Figure 8, the cutting tool 56 is equipped with a tool body 71 on which a rotary drive shaft 72 is provided, and two cutting discs 73, such as diamond blades, are attached to this rotary drive shaft 72 at intervals. The interval is set to correspond to the width of the fixing groove 55.

[0048] Then, as shown in Figures 9 and 10, in the process of forming a fixing groove 55 in the existing open channel block 51, the worker first points the outlet 7 towards the location where the fixing groove 55 will be formed and fixes the trolley body 5 in place. The front wheels 3 and rear wheels 4, which are the wheels for moving the demolition blower device 1, are used to move the trolley body 5, and the lock lever 14 is used to fix the position of the trolley body 5 after it has been moved. The outlet 7 is then fixed in place with its vertical orientation aligned towards the location where concrete dust is generated, and the blower body 6 is turned on to blow air from the tip 7S of the outlet 7.

[0049] Subsequently, as shown in Figure 9, a fixing groove 55 is formed on the inner circumferential surface 54 of the base plate 61 by two rotating cutting discs 73, 73. The dust from the cut concrete is blown away by the airflow from the blower body 6 and discharged from within the fixing groove 55. The left-right orientation of the outlet 7 is adjusted according to the orientation of the trolley body 5.

[0050] After forming a fixing groove 55 within a predetermined range, the demolition blower device 1 is moved to blow air toward the fixing groove formation location in the adjacent range of the fixing groove 55, then its position is fixed, and the direction of the outlet 7 is adjusted to fix the blowing angle, and the fixing groove 55 is cut in the adjacent range. The fixing groove formation location adjacent to the fixing groove 55 is the next predetermined range in which the fixing groove will be formed. For example, after partially forming the fixing groove 55 on the inner circumferential surface 54 of the base plate 61, a fixing groove 55 may be formed on the inner circumferential surface 54 of a side wall 62 that is not continuous with the fixing groove 55, and finally a continuous fixing groove 55 may be formed.

[0051] Furthermore, when forming a fixing groove 55 on the inner circumferential surface 54 of the side wall 62, as shown in Figure 10, the demolition blower device 1 can be fixed in place on the base plate 61 near the side wall 62, and the outlet 7 can be directed diagonally upward to blow away concrete dust and debris. In this way, the blowing angle of the outlet 7 can be adjusted from diagonally downward to diagonally upward, so that when the device is fixed in place on the base plate 61, it can blow air downward onto the inner circumferential surface 54 of the base plate 61 or diagonally upward onto the inner circumferential surface 54 of the side wall 62, and the demolition blower device 1 can be used by placing it on the base plate 61.

[0052] Thus, in this embodiment, corresponding to claim 1, the concrete chipping blower device 1 for blowing away dust generated by chipping concrete comprises a trolley body 5 having front wheels 3,3 and rear wheels 4,4 as movable wheels, a blower body 6 provided on the trolley body 5 for blowing away concrete dust, and an angle adjustment means 8 that can adjust the direction of the outlet 7 of the blower body 6 in the vertical direction. Therefore, the trolley body 5 can be fixed in position with the direction of the outlet 7 aligned with the chipping location, and after setting it to a blowing state, the concrete can be chipped using a cutting tool 56 or the like. As a result, the work that conventionally required multiple people to operate the blower body 6 and chip the concrete can now be performed by one person.

[0053] Thus, in this embodiment, in accordance with claim 2, the direction of the outlet 7 of the blower body 6 can be adjusted from diagonally downward to diagonally upward. Therefore, by setting the outlet 7 diagonally downward for positions lower than the blower body 6 and diagonally upward for positions higher than the blower body 6, the blower body 6 can be used for both chipping work on the inner circumferential surface 54 of the base plate 61, which is a horizontal concrete surface, and chipping work on the inner circumferential surface 54 of the side wall 62, which is a vertical concrete surface.

[0054] Thus, in this embodiment, corresponding to claim 3, the wheels for movement are front wheels 3,3 and rear wheels 4,4, and a locking means 13 for locking rotation is provided on at least one of these front wheels 3,3, which is the front wheel 3,3. Therefore, the front wheels 3,3 can be locked by the locking means 13, and the trolley body 5 can be fixed in position while air is being blown.

[0055] Thus, in this embodiment, corresponding to claim 4, the angle adjustment means 8 includes a tilting frame 32, which is a tilting part on which the blower body 6 is fixed and which tilts up and down around the left and right lateral bolts 34, a guide part 39 provided on the front end side, which is the tip side of the tilting frame 32, an arc groove 37 centered on the bolt 34 with which the guide part 39 engages, and a nut 41, which is a fixing means for fixing the position of the guide part 39 in the arc groove 37. Therefore, when the position fixing by the nut 41 is released, the guide part 39 can be moved along the arc groove 37, and by changing the angle of the tilting frame 32 around the bolt 34, the vertical orientation of the blower body 6 fixed to the tilting frame 32 can be changed steplessly, thereby adjusting the vertical angle of the air outlet 7. The tilting frame 32 can be stably attached and fixed in position to the trolley body 5 at two points, front and back, between the bolt 34 and the guide part 39 on the tip side of the tilting part that engages with the arc groove 37.

[0056] Thus, in this embodiment, corresponding to claim 5, open channel blocks 51, 51 having a base plate 61 and side walls 62 are connected by a strip-shaped waterproof rubber 52, and an anchor 53 provided on the waterproof rubber 52 is inserted into a fixing groove 55 formed in the concrete inner circumferential surface 54 of the open channel block 51. In the method for chipping away at the fixing groove 55 of the open channel block 51, the chipping blower device 1 described in claim 2 is used, and the dust generated when forming the fixing groove 55 with the cutting tool 56 is blown away by the blower body 6 to the location where the fixing groove 55 is to be formed. After positioning and fixing the trolley body 5 with the outlet 7 facing it, a fixing groove 55 is formed in a predetermined range. Then, after positioning and fixing the trolley body 5 with the outlet 7 facing the next predetermined range where the fixing groove 55 will be formed, the fixing groove 55 is formed in the next predetermined range. Therefore, when forming the fixing groove 55 on the inner circumferential surface 54 of the open channel block 51 in order to connect the open channel blocks 51, 51 with strip-shaped waterproof rubber 52, the work can be done by one person by alternating between setting up the chipping blower device 1 and chipping with the cutting tool 56.

[0057] Thus, in this embodiment, corresponding to claim 6, when moving the trolley body 5 on the inner circumferential surface 54 of the base plate 61 and forming a fixing groove 55 on the inner circumferential surface 54 of the base plate 61, the outlet 7 is directed diagonally downward, and when forming a fixing groove 55 on the upper side of the inner circumferential surface 54 of the side wall 62, the outlet 7 is directed diagonally upward. Therefore, the direction of the outlet 7 is set and used according to the chipping position of the fixing groove 55, and when chipping the inner circumferential surface 54 of the vertically oriented side wall 62, by directing the outlet 7 diagonally upward, the chipping blower device 1 can be placed on the base plate 61 and air can be blown onto the inner circumferential surface 54 of the side wall 62 to blow away concrete dust without having to place the chipping blower device 1 on a raised platform or lift it up.

[0058] As an effect of the embodiment described below, the front of the left and right side plates 32S, 32S of the tilting frame 32 is provided with contact edges 32F, 32F, which are oblique front contact parts with cut-out lower corners. Therefore, when the outlet 7 of the blower body 6 is pointed as far downward as possible, the left and right contact edges 32F, 32F come into contact with the upper surface of the base 2. This contact suppresses the generation of vibrations at the front end of the tilting frame 32, allowing the blower body 6 to be driven stably.

[0059] Furthermore, the left and right side plates 32S, 32S of the tilting frame 32 are provided with angled contact edges 32T, 32T at the rear, which have their lower corners cut out. As a result, when the outlet 7 of the blower body 6 is pointed upward to its maximum extent, the left and right contact edges 32T, 32T come into contact with the upper surface of the base 2. This contact suppresses vibrations at the rear end of the tilting frame 32, allowing the blower body 6 to be driven stably.

[0060] Furthermore, the angle adjustment means 8 is configured such that the tilting frame 32 is connected to a pair of left and right support columns 33, 33 so as to be able to tilt up and down around a pair of left and right bolts 34, 34, and a pair of left and right guide parts 39, 39 on the tip side of the tilting part engage with a pair of left and right arc grooves 37, 37, allowing the tilting frame 32 to be fixed in position on the base part 2 at four locations, front and rear. This allows the blower body 6 provided on the tilting frame 32 to be stably attached and fixed in position on the trolley body 5. Moreover, since the guide parts 39, 39 are provided at the left and right ends of a single guide shaft 38, the positions of the left and right guide parts 39, 39 in the left and right arc grooves 37, 37 can be correctly aligned and fixed in position.

[0061] Furthermore, since a handle 25 is integrally provided at the rear of the main body case 22, the vertical direction of the blower outlet 7 of the blower body 6 can be easily adjusted using the handle 25.

[0062] Furthermore, since the outlet 7 has a cylindrical shape with its tip 7S tapering towards the end, it can blow away dust accumulated at the bottom of the relatively narrow fixing groove 55 and efficiently remove it from inside the fixing groove 55.

[0063] Furthermore, by setting the blowing angle to +30 degrees to -30 degrees relative to the horizontal (below +30 degrees, above -30 degrees), concrete dust and debris accumulated in the anchoring grooves 55 formed on the inner circumferential surface 54 of the base plate 61, which is a horizontal surface, and the inner circumferential surface 54 of the side wall 62, which is a vertical surface, can be smoothly blown away and removed from within the anchoring grooves 55.

[0064] Furthermore, the front wheels 3 are mounted so that the wheel body 12 can rotate horizontally around a vertical axis relative to the base 2, and the front-to-back orientation of the wheel body 12 of the rear wheels 4 is fixed. This makes it easy to adjust the left-to-right orientation of the bogie body 5, that is, to position the left-to-right orientation of the air outlet 7. Also, there is no need to lock the rotation of the wheel bodies 12 of the four front and rear wheels, and the bogie body 5 can be positioned by locking the wheel bodies 12 of the front wheels 3.3.

[0065] Furthermore, the present invention is not limited to this embodiment, and various modifications can be made within the scope of the gist of the invention. For example, although the embodiment shows a blower fan driven by a power supply, an engine-driven blower fan may also be used. Also, in claim 1 or 2, the wheels for movement may be either front wheels or rear wheels, with the other being a fixing leg, the other side lifted, and the vehicle moved using either the front or rear wheel. When fixed, the fixing leg is grounded, and a locking mechanism for the wheel body may be provided on one side. Moreover, although the embodiment shows the angle adjustment mechanism provided on the front side of the trolley body and the tilting part, it may also be provided on the rear side. [Explanation of Symbols]

[0066] 1. Blower device for chipping 3 Front wheels (transportation wheels) 4 Rear wheels (movement wheels) 5. Body of the trolley 6. Blower unit 7 Air outlet 8 Angle adjustment means 13 Locking mechanism 32. Tilting frame (tilting part) 34 bolts (axle) 37 Arc groove 39 Information Department 41. Nut (fixing means) 51 Open channel block 52 Waterproof rubber 53 Anchors 54 Inner surface 55 Fixing groove 56 Cutting tools 61 Bottom plate 62 Side wall

Claims

1. In a concrete chipping blower device that blows away dust generated by chipping concrete, A trolley body having wheels for movement, A blower body is provided on the trolley body for blowing away the dust from the concrete, An angle adjustment means that allows the direction of the blower outlet of the blower body to be adjusted vertically, A demolition blower device characterized by being equipped with the following.

2. The demolition blower device according to claim 1, characterized in that the direction of the outlet of the blower body can be adjusted from diagonally downward to diagonally upward.

3. The demolition blower device according to claim 1 or 2, characterized in that the aforementioned moving wheels are front wheels and rear wheels, and at least one of these front wheels and rear wheels is provided with a locking means for locking rotation.

4. The demolition blower device according to claim 2, characterized in that the angle adjustment means comprises a tilting part on which the blower body is fixed and which tilts up and down in the front and rear directions around a pivot in the left and right lateral direction, a guide part provided on the tip side of the tilting part, an arc groove centered on the pivot with which the guide part engages, and a fixing means for positioning and fixing the guide part in the arc groove.

5. In a method for chipping away at the anchoring groove of an open channel block, in which open channel blocks having a base plate and side walls are connected by a strip-shaped waterproofing rubber, and anchors provided on the waterproofing rubber are inserted into anchoring grooves formed on the inner surface of the concrete of the open channel block, Using the demolition blower device described in claim 2, A method for chipping away at anchoring grooves in an open channel block, characterized in that, in order to blow away dust generated when forming the anchoring groove with a cutting tool using the blower body, the trolley body is fixed in position with the blower outlet directed towards the location where the anchoring groove is to be formed, and then the anchoring groove is formed in a predetermined range; and thereafter, the trolley body is fixed in position with the blower outlet directed towards the next predetermined range where the anchoring groove is to be formed, and then the anchoring groove is formed in the next predetermined range.

6. The method for chipping away at an anchoring groove in an open channel block according to claim 5, characterized in that when moving the trolley body on the inner surface of the base plate and forming the anchoring groove on the inner surface of the base plate, the outlet is directed diagonally downward, and when forming the anchoring groove on the upper side of the inner surface of the side wall, the outlet is directed diagonally upward.

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