JP2017221993A - Jig for concrete breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig for a concrete breaker which can improve the workability in the case of using a concrete breaker so that a chisel may turn upward.SOLUTION: A jig X, which supports a concrete breaker 90 equipped with a chisel 91 at the tip end part of a breaker body 92 so that the chisel 91 may turn upward, has a support cradle 10 having a top material 11, a coil spring 1 expanding and contracting in vertical directions, and a gripping tool 3 of the concrete breaker 90. The top material 11 has an opening 11a to mount the lower end part of the coil spring 1 around this opening 11a. A gripping tool 2 is mounted at the upper end part of the coil spring 1. The breaker body 92 is configured to be gripped with the gripping tool 2 by passing through the opening 11a and the coil spring 1. The opening 11a is sized so that the breaker body 92 can oscillate in horizontal directions.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a jig for supporting a concrete breaker.

  At present, a concrete breaker is widely used as a machine for crushing concrete and the like. The operating principle and method of use of this concrete breaker are generally as follows.

  First, compressed gas such as compressed nitrogen or compressed air, hydraulic oil, or the like is supplied to a cylinder provided in a breaker body of a concrete breaker. When compressed gas, hydraulic oil, or the like is supplied, the piston provided in the cylinder is driven by the pressure of the compressed gas or hydraulic oil. When the piston is driven, the piston strikes a chisel (only) provided at the tip of the cylinder, and the chisel reciprocates. Therefore, the reciprocating chisel is pressed against concrete or the like to crush the concrete or the like.

  A concrete breaker is an excellent tool in terms of the function of crushing concrete and the like. However, a strong concrete breaker has a weight of about 30 to 40 kg. Therefore, it has the following problems in terms of workability. Hereinafter, this problem will be described with reference to FIG.

  Conventionally, the structure 101 such as a wharf and a jetty has been subjected to large-scale renovation, for example, in a 5-year cycle for the purpose of extending the life. In this large-scale renovation, the rear surface 101a of the structure 101 is also a target for renovation. The back surface 101a of the structure 101 is eroded or deteriorated due to, for example, seawater salinity, wave collision, earthquake, or the like. One of the processes for repairing the back surface 101a of the structure 101 is a turning operation of the back surface 101a of the structure 101. In this turning operation, since the structure 101 is located on the sea surface 104, the anchor 102 is first driven into the back surface 101a of the structure 101. Next, the scaffold 103 is constructed by suspending with the anchor 102. When the construction of the scaffold 103 is completed, the worker holds the concrete breaker on the scaffold 103 so that the chisel faces upward, and presses the chisel against the back surface 101 a of the structure 101. By this pressing, the back surface 101a of the structure 101 is crushed.

  However, it is necessary to carry out this work by holding up a concrete breaker having its own weight of about 30 to 40 kg. Moreover, it is necessary to press the concrete breaker against the back surface 101a of the structure 101. For this pressing, a force of about 10 kg is required (including the dead weight, a force of about 40 to 50 kg is required for the turning work). Therefore, the work of turning the back surface 101a of the structure 101 is a heavy labor. In addition, since the sea level 104 rises at high tide, the distance from the back surface 101a of the structure 101 to the scaffold 103 is close (for example, about 120 cm). Therefore, the worker has to perform the work in a very inconvenient posture. In addition, when the work is carried with the concrete breaker so that the chisel is facing upward, there is a problem that the crushed concrete falls on the worker.

  In this regard, there are already proposals for preventing the crushed concrete from scattering (see, for example, Patent Document 1 and Patent Document 2). However, these proposals are proposals when the concrete breaker is used with the chisel facing downward, and cannot be used when the concrete breaker is used with the chisel facing upward.

JP-A-6-63873 JP 7-164352 A

  The main problem to be solved by the present invention is to provide a concrete breaker jig capable of improving workability when a concrete breaker is used so that the chisel faces upward.

  As a method for improving workability when using a concrete breaker so that the chisel faces upward, there are a method for improving the concrete breaker itself and a method for developing a jig for supporting the concrete breaker. Although the former method is one hand, in order to provide more versatility, the present invention and others have studied the latter method (method for developing a jig) in various ways. As a result, the following means have arrived.

(Aspect of Claim 1)
A concrete breaker jig for supporting a concrete breaker provided with a chisel at a tip portion of a breaker body so that the chisel faces upward,
A support frame having a top member, a coil strip extending in the vertical direction, and a gripping device for the concrete breaker;
An opening exists in the top member, and a lower end portion of the coil strip is attached around the opening, and the gripping tool is attached to an upper end portion of the coil strip,
The breaker body is configured to pass through the opening and the coil strip and be gripped by the gripping tool,
The opening is sized such that the breaker body can swing horizontally.
This is a concrete breaker jig.

(Aspect of Claim 2)
The support frame includes the top member and the elastic member as constituent members,
The top is polygonal,
The stretchable member is attached to each apex of the top,
The concrete breaker jig is supported by the plurality of elastic members,
An elastic force adjuster for adjusting the elastic force of the elastic member is provided,
When the expansion / contraction force of the expansion / contraction member is weakened, the expansion / contraction member can be manually expanded / contracted,
The concrete breaker jig according to claim 1.

(Aspect according to claim 3)
The elastic force adjuster can adjust the elastic force of the elastic member to 0 to 600 N.
The jig | tool for concrete breakers of Claim 2.

(Aspect according to claim 4)
A dust collection cylinder is provided above the gripping tool,
A net is provided at the upper end opening of the dust collecting cylinder,
A suction nozzle is provided on the peripheral wall of the dust collecting cylinder,
The chisel passes through the dust collection cylinder and penetrates the mesh material.
The jig | tool for concrete breakers of any one of Claims 1-3.

  According to the present invention, a jig for a concrete breaker is provided that can improve workability when using a concrete breaker so that the chisel faces upward.

It is a perspective view of the jig | tool for concrete breakers. It is explanatory drawing of the movable range of the jig | tool for concrete breakers. It is an example of a form of a holding tool. It is an example of the place which uses a concrete breaker.

  Next, the form for implementing this invention is demonstrated. Note that this embodiment is an example of the present invention. The scope of the present invention is not limited to the scope of this embodiment.

  As shown in FIG. 1, a concrete breaker jig X (hereinafter also referred to as “jig X” at the end) of the present embodiment includes a concrete breaker 90 provided with a chisel 91 at the tip of a breaker body 92. It is a jig that supports so as to face upward.

  In this specification, an object (equipment) supported by the jig X is a “concrete breaker”. However, this expression is not intended to limit the object supported by the jig X to “a device whose object of crushing is concrete”. In the technical field to which the present embodiment belongs, even if the object of crushing is other than concrete or even if the object of crushing includes other than concrete, it is called a concrete breaker. Therefore, the same expression (concrete breaker) is also used in this specification. A concrete breaker is also sometimes referred to as an air breaker. This does not mean that the object (equipment) supported by the jig X is limited to “an apparatus in which the piston provided in the breaker body is driven by compressed air”. A machine in which a piston provided in the breaker body is driven by a compressed gas such as compressed nitrogen, hydraulic oil, electricity, or the like is also an object supported by the jig X of this embodiment.

  The jig X of this embodiment mainly includes a support base 10, a coil ridge 1, a gripping tool 2, a dust collection cylinder 3, and a foot pedal 13. The support base 10 mainly includes a top member 11, an air cylinder 12, and a bottom member 14.

  The top member 11 has a triangular shape in plan view. As is clear from the following description, the top 11 is triangular, so that the jig X can be reduced in weight while ensuring the function of the jig X. However, when there is no need for weight reduction or the like, the top member 11 can be formed into a polygonal shape of a quadrangle or more, a circular shape, an arbitrary shape or the like in a plan view.

  The top material 11 is plate-shaped. However, also in this respect, as in the case of the shape in the plan view, when there is no need for weight reduction or the like, a state other than the plate shape can be used.

  As described above with reference to FIG. 4, there may be a case where a sufficient work space is not secured at the place where the jig X is installed. Moreover, the jig | tool X must move according to progress of a turning operation | work. Therefore, weight reduction of the jig | tool X may become a very important element.

  The top member 11 has an opening 11a. The opening 11a is a portion through which the breaker body 92 passes through in a state where the concrete breaker 90 is supported by the jig X.

  The opening 11a has such a size that the breaker body 92 can swing in the horizontal direction. That is, the peripheral edge of the opening 11 a is separated from the breaker body 92. Due to the existence of this separation, the concrete breaker 90 can be inclined in an arbitrary direction as shown in FIG. Moreover, although not shown in figure, when the said space | interval exists, the concrete breaker 90 can be shifted to arbitrary directions. As a result, for example, by tilting the concrete breaker 90, the tip of the chisel 91 can be moved within the predetermined range L1. Therefore, according to the jig X of the present embodiment, the turning operation within the predetermined range L1 can be performed without moving the jig X.

  The separation distance from the peripheral edge of the opening 11a to the breaker body 92 may be calculated in reverse from, for example, how much the concrete breaker 90 is inclined. Note that the inclination angle of the concrete breaker 90 is preferably, for example, −30 to + 30 ° when the vertical direction is 0 °.

  The opening 11a is circular in plan view. However, as long as the condition that the breaker main body 92 passes and the condition that the breaker main body 92 can swing can be satisfied, a polygonal shape such as a quadrangle, an arbitrary shape, or the like can be used.

  An air cylinder 12 is attached to each apex portion 11 b of the top member 11. The air cylinder 12 can be manually expanded and contracted in the axial direction. The expansion / contraction force of the air cylinder 12 is adjusted by the pressure of the compressed air A sent from the foot pedal 13. However, other conditions such as a hydraulic cylinder and an electric cylinder can be used instead of the air cylinder 12 as long as the condition that it can be manually expanded and contracted in the axial direction and the condition that the expansion and contraction force can be adjusted are satisfied. A member can also be used.

  In expanding / contracting the expansion / contraction member such as the air cylinder 12 in the axial direction, it is conceivable to use compressed air, pressure of hydraulic oil, electric power, or the like. However, it is preferable to enable manual expansion / contraction because fine adjustment can be performed and the weight can be reduced. This manual expansion / contraction is a scene where the expansion / contraction force of the air cylinder 12 is weakened. When the expansion / contraction force of the air cylinder 12 is increased, the air cylinder 12 expands accordingly and cannot be manually expanded / contracted.

  The air cylinder 12 is attached to the top member 11 so that the air cylinder 12 can be tilted in any direction with respect to the top member 11. In order to make the air cylinder 12 tiltable with respect to the top member 11, for example, a knot between the top member 11 and the air cylinder 12 may be configured using a free joint or the like.

  In this embodiment, since the top member 11 has a triangular shape, three air cylinders 12 are provided. The jig X of this embodiment is supported by the three air cylinders 12. That is, the air cylinder 12 becomes a leg portion of the jig X of this embodiment.

  The air cylinder 12 may be attached to a portion other than the apex portion 11b of the top member 11. However, if the air cylinder 12 is attached to a portion other than the apex portion 11b, the structure of the jig X becomes complicated and the jig X becomes heavy. Therefore, the air cylinder 12 is preferably attached only to the apex portion 11 b of the top member 11.

  A bottom material 14 is attached to the lower end of each air cylinder 12. The bottom member 14 connects the lower ends of the air cylinders 12 and has a frame shape forming a triangle in plan view. Since the lower end portion of the air cylinder 12 is connected by the bottom member 14, the movement of the lower end portion of the air cylinder 12 in the horizontal direction is restricted (restricted).

  Unlike the present embodiment, the bottom member 14 can be formed of, for example, a single triangular plate. However, from the viewpoint of reducing the weight of the jig X, it is preferable to form the bottom member 14 in a frame shape as in this embodiment.

  The coil strip 1 is disposed on the support frame 10. The coil strip 1 expands and contracts in the vertical direction. The lower end portion of the coil strip 1 is attached around the opening 11 a of the top member 11. That is, a circular coil in plan view that constitutes the lower end portion of the coil strip 1 is attached to the top member 11 along the periphery of the opening 11a.

  The gripping tool 2 is disposed on the coil strip 1. The gripping tool 2 is attached to the upper end portion of the coil strip 1. That is, the gripping tool 2 is attached to a circular coil in a plan view that constitutes the upper end portion of the coil strip 1.

  The gripping tool 2 has an annular shape (ring shape). As shown in FIGS. 3 (1) and (2), the gripping tool 2 grips the breaker body 92 via the cushioning material 2b. This gripping position is preferably near the center of gravity of the concrete breaker 90. The buffer material 2b can be omitted.

  A method for fixing the breaker body 92 to the gripping tool 2 is not particularly limited. For example, as shown in (1) of FIG. 3, the screw member 2a is inserted into the gripping tool 2 in the radial direction and the tip of the screw member 2a is abutted against the breaker body 92, whereby the breaker is attached to the gripping tool 2. A method of fixing the main body 92 can be employed. However, the screw material 2a is expected to loosen due to vibration received from the concrete breaker 90. Therefore, as shown in FIG. 3 (2), the gripping tool 2 is constituted by a so-called opening / closing bracket, and the protruding piece 2c provided at the opening end of the opening / closing bracket is connected by a fastening bolt (not shown) (clamp form). Is more preferable. Further, it is also preferable to adopt a form similar to this clamp form, for example, a form in which the gripping tool 2 is constituted by two semicircular metal fittings and the protruding pieces provided at both ends of each metal fitting are connected by a connecting bolt. .

  The breaker body 92 passes through the opening 11 a of the top member 11 and the coil ridge 1 and is gripped by the gripping tool 2. Further, the gripping tool 2 is supported by the top 11 through the coil ridge 1. Therefore, according to the jig X of this embodiment, the breaker body 92 (concrete breaker 90) is suspended from the top member 11.

  Here, the coil strip 1 employed for suspending the breaker body 92 on the top member 11 has a conical shape whose diameter narrows from the lower end toward the upper end. However, from the viewpoint of suspending the breaker main body 92, the coil strip 1 can be formed into a cylindrical shape, for example. However, from the viewpoint of stabilizing the breaker body 92 in particular in the lateral direction, it is preferable that the coil strip 1 is conical as in this embodiment.

  The foot pedal 13 has a function of adjusting the expansion / contraction force of the air cylinder 12. Therefore, the foot pedal 13 is a tool for adjusting the expansion / contraction force of the air cylinder 12. By changing the degree of depression of the foot pedal 13, the expansion / contraction force of the air cylinder 12 can be increased or decreased. Moreover, when the expansion / contraction force of the air cylinder 12 is weakened, the air cylinder 12 can be manually expanded and contracted. Therefore, according to the jig X of this embodiment, the following advantages are exhibited in the turning operation.

  First, when it is necessary to shift the place where the wheel is turned during the turning work, the foot pedal 13 is used to weaken the expansion / contraction force of the air cylinder 12. Next, as shown in (2) of FIG. 2, the concrete breaker 90 and the top member 11 are pulled in the direction of a place where they are newly rolled. As a result, the pulled (one) air cylinder 12x contracts, and the opposite (other) air cylinder 12y extends. As a result, the position of the concrete breaker 90 is shifted in the direction of a new location. Therefore, according to this embodiment, it is possible to shift the place where the turning work is performed without moving the jig X, and it is possible to continue the turning work.

  If the concrete breaker 90 is shifted, the concrete breaker 90 is inclined or the position of the concrete breaker 90 is shifted as necessary so that the tip of the chisel 91 hits appropriately. And after using the foot pedal 13 to strengthen the extension force of the air cylinder 12, the use of the concrete breaker 90 is started. It is preferable that the expansion / contraction force of the air cylinder 12 can be adjusted to 0 to 600N. If the expansion / contraction force of the air cylinder 12 can be increased to 600 N and the air cylinder 12 is configured to extend at this time, a sufficient pressing force against the construction surface of the chisel 91 can be secured. it can.

  In this embodiment, the movable range at the tip of the chisel 91 is the sum of the movable distance L2 using the expansion and contraction of the air cylinder 12 and the movable range (predetermined range) L1 using the inclination of the breaker body 92. Therefore, the movable range of the chisel 91 is extremely wide.

  According to the present inventors producing and testing a prototype, the movable range L1 due to the inclination of the breaker body 92 can be set to 0 to 500 cm. Further, the movable range L2 due to the expansion and contraction of the air cylinder 12 can be set to 0 to 800 cm.

  In this embodiment, the air cylinder 12 is used as the elastic member. Therefore, the foot pedal 13 is configured to send the compressed air A sent from a compressor or the like (not shown) through the air hose 13b to each air cylinder 12 through the air hose 13a. The foot pedal 13 is provided with a pressure adjusting mechanism such as a pressure reducing valve. Therefore, when using other expansion / contraction members such as a hydraulic cylinder and an electric cylinder as the expansion / contraction member, the expansion / contraction force adjusting tool corresponding to the various expansion / contraction members is used.

  In the present embodiment, the stretching force of the plurality of air cylinders 12 is centrally managed by one foot pedal 13. However, the expansion / contraction force of the plurality of air cylinders 12 can be adjusted individually by providing a plurality of foot pedals. However, if the expansion and contraction forces of the plurality of air cylinders 12 can be adjusted individually, the jig X becomes complicated and heavy. Therefore, it is preferable to integrally manage the stretching force of the plurality of air cylinders 12.

  The dust collection cylinder 3 is disposed above the gripping tool 2. In addition, a net 4 is provided at the upper end opening of the dust collecting cylinder 13. Further, a suction nozzle 5 is provided on the peripheral wall of the dust collecting cylinder 3. Although not shown, this suction nozzle is connected to a vacuum device, a dust collector or the like through a vacuum hose, for example. And in the jig | tool X, the chisel 91 of the concrete breaker 90 passes through the inside of the dust collection cylinder 3, and is comprised so that the net | network material 4 may be penetrated. Therefore, the concrete crushed by the concrete breaker 90 is sucked into the dust collecting cylinder 3 and there is no possibility of falling on the worker. Moreover, since the net | network material 4 is provided, there is no possibility that the vacuum hose etc. which are connected with a vacuum apparatus etc. will obstruct | occlude.

  In the above description, the jig X on which the support frame 10, the coil strip 1, the gripping tool 2, the dust collecting cylinder 3, and the like have already been assembled has been described. However, since the jig X of this embodiment has an extremely simple structure, various members can be assembled at a construction site (working place).

  The present invention can be used as a jig for supporting a concrete breaker provided with a chisel at the tip. In addition to the back side of the structure such as the wharf and jetty mentioned above, the target surface of the work with the concrete breaker supported using this jig is the ceiling of the waterway tunnel, the bottom of the bridge, the ceiling of the building, etc. It can be illustrated.

DESCRIPTION OF SYMBOLS 1 Coil ripening 2 Grip 2a Screw material 2b Buffer material 2c Projection piece 3 Dust collection cylinder 4 Net material 5 Suction nozzle 10 Support stand 11 Top material 11a Top material opening 11b Top material top part 12 Air cylinder 12x One air Cylinder 12y The other air cylinder 13 Foot pedal 13a Air hose 13b Air hose 14 Bottom material 90 Concrete breaker 91 Chisel 92 Breaker body 101 Structure 101a Structure back surface 102 Anchor 103 Scaffold 104 Sea water surface

Claims (4)

A concrete breaker jig for supporting a concrete breaker provided with a chisel at a tip portion of a breaker body so that the chisel faces upward,
A support frame having a top member, a coil strip extending in the vertical direction, and a gripping device for the concrete breaker;
An opening exists in the top member, and a lower end portion of the coil strip is attached around the opening, and the gripping tool is attached to an upper end portion of the coil strip,
The breaker body is configured to pass through the opening and the coil strip and be gripped by the gripping tool,
The opening is sized such that the breaker body can swing horizontally.
This is a concrete breaker jig. The support frame includes the top member and the elastic member as constituent members,
The top is polygonal,
The stretchable member is attached to each apex of the top,
The concrete breaker jig is supported by the plurality of elastic members,
An elastic force adjuster for adjusting the elastic force of the elastic member is provided,
When the expansion / contraction force of the expansion / contraction member is weakened, the expansion / contraction member can be manually expanded / contracted,
The concrete breaker jig according to claim 1. The elastic force adjuster can adjust the elastic force of the elastic member to 0 to 600 N.
The jig | tool for concrete breakers of Claim 2. A dust collection cylinder is provided above the gripping tool,
A net is provided at the upper end opening of the dust collecting cylinder,
A suction nozzle is provided on the peripheral wall of the dust collecting cylinder,
The chisel passes through the dust collection cylinder and penetrates the mesh material.
The jig | tool for concrete breakers of any one of Claims 1-3.

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