JP3229647U - Scattering prevention cover for chipping work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anti-scattering cover for preventing scattered objects generated by a chipping tool such as a concrete breaker or a bedrock breaker. SOLUTION: The shatterproof cover is made of a flexible plastic sheet, and has an opening 2a of an upper portion 2, a head-shaped expanding portion 3 gradually widening downward from the opening, and the like. It consists of a tubular portion 8 extending downward from the expansion portion centered on the chipping tool, and a large number of narrow band-shaped foot pieces 4 hanging from the lower portion of the tubular portion so as to cover the outer circumference, and the peripheral edge of the opening and the opening. It is composed of reinforcing portions 5a to 5c extending in a strip shape along the top and bottom of the tubular portion from the top and bottom of the expansion portion extending radially along the portion or from the expansion portion. [Selection diagram] Fig. 1

Description

The present invention is provided with a chipping tool that moves in a predetermined direction according to the movement of a driving member, such as a concrete breaker or a bedrock breaker, and the scattering prevention device attached to a work device that hits or cuts an object with the chipping tool. Regarding the cover.

For example, when crushing or drilling a concrete pavement or rock, a blade such as a bit or a blow that moves in a predetermined direction according to the movement of a driving member such as a piston hammer is provided, and this blade is used as an object. Work machines that hit or cut certain concrete pavements and rocks are often used.
There are various types of such work machines, such as a hydraulic breaker, a hydraulic crusher type breaker, and a chisel type breaker, and they are used properly according to the purpose of use. Accidents such as injuries to workers and damage to surrounding equipment and articles were likely to occur.

Therefore, the work machine with a shatterproof cover of No. 7-5458 is provided with a blade portion that moves in a predetermined direction in accordance with the movement of the drive member, and the work machine that hits or cuts an object with this blade portion is used. It has an umbrella-shaped shatterproof cover that opens with the raw air or exhaust supplied when the blade is moving and closes when the supply of the raw air or exhaust is stopped, and the shatterproof cover is provided by the blade. A structure is known that opens in a place that blocks the scattering of debris or powder generated by impact or cutting in a predetermined direction.
Further, in the dismantling method, the dismantling machine and the noise reducing device for reducing the noise generated in the dismantling work of Japanese Patent Application Laid-Open No. 2018-105044, a breaker attachment having a chisel is attached to the tip of the arm of the giant breaker. This breaker attachment includes a foam distribution unit that discharges foam so as to cover the periphery of the flea. A bag body that covers the outer circumference of the flea is attached to the breaker attachment, and the bag body is filled with the foam body from the foam body distribution part, and the circumference of the flea is covered with the foam body. Is in operation for dismantling work.

Special Fair 7-5458 Gazette Japanese Unexamined Patent Publication No. 2018-105044

The problem to be solved by this device is to cover the circumference of the chipping tool with a bag using a flexible polyvinyl chloride sheet, and enclose the crushed pieces and powder scattered by the chipping work in the bag. It provides an inexpensive and simple shatterproof cover for a chipping work device that can be held by.

In order to achieve the above object, in the device of claim 1,
In the shatterproof cover that blocks the shattering of crushed pieces and powders generated by the chipping work
The shatterproof cover consists of a flexible polyvinyl chloride sheet
An opening provided in the upper part of the shatterproof cover, an expanding portion that gradually widens downward from the opening, a tubular portion that extends substantially tubular from the expanding portion, and the tubular portion. It is a sleeve-like structure consisting of a large number of narrow band-shaped foot pieces that hang down from the lower part of the foot.
The opening is provided with a hole for inserting the chipping tool, and is provided with a holding means for holding the shatterproof cover so as not to fall by the non-vibrating portion of the chipping tool.
In the device of claim 2,
The holding means is made of an elastic sheet fixed to the opening, and has a hole in the center thereof for inserting the chipping tool against the repulsive force and sandwiching the non-vibrating portion of the chipping tool. It is characterized by that.
In the device of claim 3,
The shatterproof cover is characterized in that a plurality of cover constituent pieces of a polyvinyl chloride sheet are arranged and bonded in the vertical direction to form a reinforcing portion.

In the anti-scattering cover of the present invention, the anti-scattering cover is held by fixing the hole of the anti-scattering cover to the non-vibrating portion of the chipping tool, and the tubular portion is held through the expanded portion of the cover. Can open around the chipping tool, take in outside air from the foot piece, hold it in a bag shape, and bend in any direction. In particular, the foot can be bent in any direction to close the bottom opening, and can prevent the dissipation of crushed pieces and powder generated by the chipping work.

It is a perspective view which shows the use state of the shatterproof cover. It is the same plan view. It is a front view which shows the separated state of the expanded part and the tubular part of the cover component piece of a shatterproof cover. It is a front view which shows the fusion state of the expanded part and the tubular part. It is a perspective view of the state in which the four cover constituent pieces of Example 2 are pasted together and the opening is attached. It is explanatory drawing which shows the separated state of the spread part of the cover component piece of the cover for shattering prevention, the upper part of a tubular part, and the lower part of a tubular part. It is explanatory drawing of the state in which the cover constituent pieces are pasted together. It is a front view which the cover structure piece of Example 3 consists of two sides. It is a perspective view showing a different form of an opening. It is a perspective view which shows the use state of the shatterproof cover. It is a perspective view which shows the state which the shatterproof cover is bent.

Hereinafter, a preferred embodiment of the shatterproof cover of the present invention will be described with reference to the drawings.

[Chipping work equipment]
In the present embodiment, the chipping work device is a hydraulic excavator with a breaker attachment as a work device 10 attached to the tip of the arm, and the chipping work is performed. However, in this invention, a chipping tool such as a chisel is used. Any device or instrument that performs chipping work, such as an electric breaker that is directly connected to an electric motor and operated by an operator, may have any structure.

[Scattering prevention cover]
The shatterproof cover 1 shown in FIGS. 1 to 4 is a sleeve-shaped polyvinyl chloride sheet formed as a flexible plastic resin.
In the case of this embodiment, the shatterproof cover 1 is provided with an upper surface portion 2 which is closed at the upper end with an elastic plate or sheet of rubber or elastomer and has a small-diameter hole portion 2a at the center.

Then, while expanding the diameter of the small-diameter hole portion 2a, the tubular non-vibrating portion 13 of the larger-diameter chipping tool 12 is pushed in, and the non-vibrating portion 13 is pushed by the elastic return force of the elastic body by the hole portion 2a. Is tightened and fixed.
An expanding portion 3 is formed from the upper surface portion 2 fixed to the non-vibrating portion 13 so as to gradually widen downward from the outer edge thereof, and a pyramid or a cone or a head cone centered on the chipping tool 12. It is formed so as to extend in a pyramidal shape and cover widely downward.

Below the expansion portion 3, there is a tubular portion 8 extending with the same diameter centered on the chipping tool 12, and a large number of narrow band-shaped legs hang down from the lower portion so as to cover the outer circumference without gaps at approximately equal intervals. Piece 4 is formed.

In order to maintain the shape of the expanded portion 3 and the tubular portion 8, the upper surface portion 2 to the expanded portion 3 and the upper surface portion 2 to the lower end of the foot piece 4 are reinforced in a radial band along the ridgeline. Part 5 is formed.
It suffices that the reinforcing portion 5 can retain its shape while having flexibility. In this embodiment, all or a part of the edges of the expanding portion 3 and the tubular portion 8 are overlapped and fused. It is realized by doing.

In the case of the illustrated example, the reinforcing portion 5 is composed of an upper surface peripheral edge portion 5a that covers the upper surface portion 2 in an annular shape, an expanded portion peripheral edge portion 5b extending radially from the upper surface portion 2, and an expanded portion and a tubular portion peripheral edge portion 5c. It has become.

In the reinforcing portion 5, the plastic film piece to be fused with the polyvinyl chloride sheet of the main body may be formed into a band shape and fused integrally with the main body to increase the strength.
The shatterproof cover 1 of this embodiment is composed of four film pieces divided into four surfaces, and each surface has a trapezoidal portion 6 as an upper portion and a rectangular portion separated from the trapezoidal portion 6, as shown in FIG. It consists of 7.

In the trapezoidal portion 6, fusion portions 6a and 6b are formed along the left and right inclined sides and the lower end side (lower bottom portion).
Here, an example of the dimensions is as follows: the upper base is 150 mm, the inclined side is 235 mm, and the lower base is 400 mm.
Next, the rectangular portion 7 has a length of 435 mm and a width of 400 mm, and the foot piece 4 is formed in a range of 200 mm vertically from the bottom.
The above length is an example, and the length is not particularly limited in the present invention, and the design can be appropriately changed according to the content and application of the chipping work.

Then, the fused portion 7a'is formed along the upper side 7a, and the fused portion 7b'is formed along the left and right side ends 7b.
Therefore, as shown in FIG. 4, the fused portion 6b'along the lower bottom side 6b of the trapezoidal portion 6 and the fused portion 7a' along the upper side 7a of the rectangular portion 7 are overlapped and fused. It is one cover component F.

As shown in FIG. 1, four of the cover constituent pieces F are arranged at 90-degree intervals and the fused portions 6a'and 6a', 7b'and 7b'that are adjacent to each other in the outer peripheral direction are fused. The shatterproof cover 1 is formed.
Here, the upper surface portion 2 is supported by the outer peripheral edge of a square rubber plate (150 mm × 150 mm) being integrally fixed to the upper bottom portion of the trapezoidal portion 6.
In the case of the illustrated example, the central hole 2a of the upper surface portion 2 is formed of a circular hole having a diameter of 40 mm or 45 mm.

As described above, this diameter may be appropriately set to a size that can be fixed corresponding to the diameter of the non-vibrating portion 13 of the chipping tool 12.
The shatterproof cover 1 may be fixed by a known method so that the shatterproof cover 1 does not come off. However, in this embodiment, the repulsive elastic plate is used to fix the upper surface of the shatterproof cover 1. The hole portion 2a of the portion 2 is attached to the non-vibrating portion 13.
As a result, the shatterproof cover 1 is attached so as to hang down so as to cover the outer periphery at substantially equal intervals around the axis of the chipping tool 12 (see FIGS. 10 and 11).

At this time, it is preferable that the shatterproof cover 1 is arranged above the base end of the foot piece 4, for example, so that the tip of the chipping tool 12 is in the middle position in the height direction.
As a result, during the chipping work, the circumference of the chipping tool 12 is covered at the same position as or above the base end of the foot piece 4 of the shatterproof cover 1, and the chipping tool 12 is used while taking in outside air from the foot piece 4 side. Have them perform the chipping work.
Further, even if the non-vibrating portion 13 is lowered due to the chipping work, each foot piece 4 can be bent in an arbitrary direction to substantially close the outer circumference of the bottom opening, so that the foot piece 4 is bent and the bag is closed. By enclosing it in a shape, it is possible to prevent the dissipation of crushed pieces and powders generated by the chipping work.

The shatterproof cover 1 of the second embodiment shown in FIGS. 5 to 7 is different in that the width reinforcing portion 9 is provided at an intermediate position in the vertical direction of the tubular portion 8.
That is, the rectangular portion 7 shown in FIG. 6 is composed of an upper rectangular piece portion 7A (width 400 mm × length 155 mm) and a lower rectangular piece portion 7B (width 400 mm × length 280 mm), and the lower rectangular piece portion 7B is from above. 80 mm is formed on a flat surface, and a foot piece 4 is formed on the remaining 200 mm below.

A fused portion 9a'is formed along the bottom 9a of the upper rectangular piece portion 7A, and a fused portion 9b'is formed along the upper side 9b of the lower rectangular piece portion 7B.
Therefore, the fused portion 6b'along the lower end side 6b of the trapezoidal portion 6 and the fused portion 7a' along the upper side 7a of the upper rectangular piece portion 7A are overlapped and fused, and the base of the upper rectangular piece portion 7A is fused. The fused portion 9a'of 9a and the fused portion 9b' of the upper side 9b of the lower rectangular piece 7B are overlapped and fused to form one cover constituent piece F as shown in FIG.

Using four of the cover constituent pieces F, they are arranged at 90-degree intervals, and the fused portions 6a'and 6a', 7b' and 7b', and 9a'and 9b'that are adjacent to each other in the outer peripheral direction are fused. Therefore, the sleeve shape shown in FIG. 5 can be obtained.
In this embodiment, since the fused portions 9a'and 9b'overlap and fuse with the continuous portion of the upper rectangular piece portion 7A and the lower rectangular piece portion 7B, the strength of the tubular portion 8 can be further reinforced. it can.
Since the structure of the upper surface portion 2 is the same as that of the first embodiment and conforms to FIG. 2, the description thereof will be omitted.

FIG. 8 has a structure in which a welding portion for reinforcement is not provided at an intermediate position of the tubular portion 8 as in the first embodiment, and one cover constituent piece F constitutes two surfaces. It consists of a pair of left and right trapezoidal portions 6 and 6 and a rectangular portion 7 integrally connected to each trapezoidal portion 6. In the example shown in the figure, the inclined side 6a of the trapezoidal portion 6 is 235 mm and the top portion 6c (upper). The base) is 150 mm, the height 7b from the bottom of the inclined side to the lower end (lower bottom) of the rectangular portion 7 is 400 mm, and the width of the lower end of each trapezoidal portion 6, that is, the width between the rectangular portions 7 7b-7b. Are 400 mm (800 mm in total).

A reinforcing portion 5 is formed on each edge portion other than the lower end portion by superimposing the fused portions shown by diagonal lines in the figure.
The reinforcing portion 5 is formed by superimposing and fusing the edges of the film, and is reinforced by laminating the edges of a pair of developing pieces, or a plurality of sections having the same shape are laminated and bonded so as to form a core. The non-vibrating portion 13 of the working device is fixed to the hole portion 2a of the upper surface portion 2 in the same manner as in the above embodiment.

The upper surface portion 2 covering the upper portion of the shatterproof cover 1 may be fitted externally to the non-vibrating portion 13 on the tip side of the chipping work device 12 and detachably fixed by a fixing tool W1 such as a wire as a holding means. Good (see Figure 9).
The non-vibrating portion 13 may be a portion that does not interlock with the excavation vibrating portion such as a breaker during the chipping work, and may be interlocked with the movement of the attachment.

In the above embodiment, the shatterproof cover is formed of a substantially pyramidal sleeve having a narrow opening, but may be formed of a sleeve having a polygonal cross section or a sleeve having a substantially cylindrical shape.
In the case of a cylindrical shape, the reinforcing portion may be provided at an arbitrary location.
The present invention is not limited to the above embodiment, and can be appropriately modified as long as it is within the scope of the gist thereof.

1 Anti-scattering cover 2 Top surface 2a Hole 3 Expansion 4 Foot piece 5 Reinforcing part 5a Opening edge 5b Expansion edge 5c Expansion and cylinder upper edge 6 Trapezoidal part 6a Inclined side 6b Lower bottom 6c Upper bottom part 7 Rectangular part 7a Vertical side 8 Cylindrical part 10 Breaker attachment s as an example of a chipping work device
12 Chipping tool 13 Non-vibrating part

Claims (3)

In the shatterproof cover that blocks the shattering of crushed pieces and powders generated by the chipping work
The shatterproof cover consists of a flexible polyvinyl chloride sheet
An opening provided in the upper part of the shatterproof cover, an expanding portion that gradually widens downward from the opening, a tubular portion that extends substantially tubular from the expanding portion, and the tubular portion. It is a sleeve-like structure consisting of a large number of narrow band-shaped foot pieces that hang down from the lower part of the foot.
The opening is provided with a holding means for inserting the chipping tool into the opening, and the non-vibrating portion of the chipping tool holds the scattering prevention cover so as not to fall. cover. The holding means is made of an elastic sheet fixed to the opening, and has a hole in the center thereof for inserting the chipping tool against the repulsive force and sandwiching the non-vibrating portion of the chipping tool. The shatterproof cover according to claim 1. The chipping work provided with the shatterproof cover according to claim 1 or 2, wherein the shatterproof cover is formed by arranging a plurality of cover constituent pieces of a polyvinyl chloride sheet and bonding them in the vertical direction to form a reinforcing portion. apparatus.

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