JPH0627290Y2 - Hinge cover for preventing scattering of cutting pieces of hydraulic cutter - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a cutting piece or the like in a cutting process of a hydraulic cutter performed by moving a piston with pressurized oil and using a movable cutter provided at the piston tip. The present invention relates to a scattering prevention cover that prevents scattering.

[Conventional technology]

In a hydraulic cutter, a piston is reciprocally arranged in a cylinder forming a part of a main body. Then, by the piston head, a pair of chambers (first,
A second chamber) is defined in the cylinder to the left and right of the piston head. For example, the first chamber is in constant communication with the reservoir to form a part of the reservoir, and a return spring made up of a compression coil spring is arranged in this chamber. A cutter (movable cutter) is attached to the tip of the piston, and another cutter (fixed cutter) is attached to the housing, which is a part of the main body, facing the cutter.

In the hydraulic cutter having such a configuration, the operation switch is turned on after a work piece such as a reinforcing bar is placed between the movable cutter at the piston tip and the fixed cutter in the housing. Then, the motor in the main body operates to start the pump, the hydraulic oil (pressurized oil) pressurized by the pump is supplied from the reservoir to the second chamber, and the piston resists the biasing force of the return spring. And move forward. Then, due to the shearing force acting between the movable cutter that moves forward with the piston and the fixed cutter,
The work piece between the pair of cutters is cut (sheared).

At the time of cutting, a bending moment acts on the work piece due to the shearing force, and the work piece tends to escape in the horizontal direction. Therefore, the main body (housing) is adjacent to the fixed cutter.
A bolt with a lock nut is screwed onto the, and the side surface of the workpiece is brought into contact with the top surface of the bolt fixed using the lock nut to prevent escape of the workpiece. in this way,
The bolt functions as a stopper that prevents escape of the workpiece, and is also called a stopper bolt.

In a known hydraulic cutter, in particular, a small-sized portable hydraulic cutter, an upper part of the pair of cutters is open. In this way, if the upper part is open, the work piece placed between the pair of cutters can be seen sufficiently, and the work piece can be easily loaded and unloaded (loading / unloading) and the cutting length is long. Can be set accurately. In addition, the state of the workpiece and the pair of cutters during the cutting process can be fully visually observed.

However, the cut pieces cut and separated from the work piece may jump and scatter immediately after cutting. Further, since the pair of cutters (movable cutters, fixed cutters) are both formed from brittle material, if they are damaged, they may be abruptly broken by the impact force, and broken fragments of the cutter may be scattered. Then, the cutting pieces and the broken pieces of the cutter may scatter above the pair of cutters, and may directly hit the operator of the hydraulic cutter, resulting in injury.

Therefore, there is provided a shatterproof cover that covers the open parts above the pair of cutters and protects the operator from scatter of cutting pieces and broken fragments of the cutters. Here, if the cover always covers the upper part of the pair of cutters, it is not possible to easily carry in and out the workpiece, set the cutting length, and the like. Therefore, the cover is removed from above the cutter at the stage of loading the workpiece and setting the cutting length. Then, after the workpiece is carried in and the cutting length is adjusted, the cover is moved over the cutter to cover the upper side of the cutter, and then the cutting process is performed.

Thus, by covering the upper part of the cutter with the scattering prevention cover, even if the cutting pieces and the broken pieces of the cutter are splashed and scattered, the cutting pieces and the broken pieces collide with the cover and are scraped off. , The operator is protected.

[Problems to be solved by the device]

The known shatterproof cover has a substantially L shape in which a plate is attached to the tip of a pair of legs, and the pair of legs is swingably attached to the tip of the side surface of the main body of the hydraulic piston by bolts or the like. . Then, tilt the legs of the shatterproof hinge cover forward (in the direction of the tip of the hydraulic piston body), rock it until it is almost horizontal, and let it escape to the retracted position. The cutting length is adjusted. Then, the cover is swung toward the center of the main body and moved to the operating position (covering position) to cover the upper part of the pair of cutters, and then the operating switch is turned on to cut the workpiece with the hydraulic cutter. Is performed. That is, as shown by the chain double-dashed line in FIG. 4, the known shatterproof cover indicated by reference numeral 110 is rotated clockwise from the retracted position in which the legs are tilted to the operating position as seen from the arrow. Be transferred.

The shatterproof cover is molded with a strength and a weight that will not break even if a cutting piece or a broken piece of a cutter bounces up and collides, and that does not bounce up together with the cutting piece or the like. In addition, meshes, pores, etc. are provided in the cover so that the state of the workpiece and the pair of cutters during the cutting process can be sufficiently observed. It is also conceivable to mold the cover from a transparent body.

However, since the cover is frequently swung between the retracted position and the cover position, it cannot be heavy. Therefore, the cover may be flipped up due to the collision of the cutting pieces and the broken pieces of the cutter. If the cover 110 is flipped up, the cover 110 is swung forward, that is, the cover 110 is swung in the direction of the retracted position shown by the chain double-dashed line in FIG. By the way, the cover is provided in front of the main body and is configured to swing backward (toward the central portion of the main body) to cover the upper side of the cutter,
The operator is located in the center of the body. for that reason,
The cut pieces and the broken pieces may fly toward the central portion of the main body through the gap, and may directly hit the operator located in the central portion of the main body.

Further, the known shatterproof cover is not directly attached to the hydraulic cutter, but special consideration is required for attachment to the hydraulic cutter. For example, the cover is swingably attached to the body of the hydraulic cutter by a pair of mounting bolts, and the mounting bolt serves as the swing center. Therefore, a pair of mounting bolts are required, and a screw hole into which the bolts are screwed must be formed in the main body.

Even if the cover is flipped up, this device avoids the direct impact of cutting pieces and fragments on the operator, and can be mounted as it is without any special processing or parts. It is intended to be provided.

[Means for Solving the Problems]

In order to achieve this object, according to the present invention, attention is paid to a stopper bolt with a lock nut provided on the body of the hydraulic cutter on the side of the cutter, and the stopper bolt is effectively used.

In other words, the shatterproof cover is a hinge cover that has a cover body and a hinge piece that secures the swing of the cover body, and the hinge piece can be attached to the hydraulic cutter by using the lock nut of the stopper bolt. It is configured.

For example, it is advisable to provide the hinge piece with an elongated hole that opens downward or sideways.

[Action]

According to such a configuration, the hinge piece of the hinge cover is
The stopper bolt is inserted from above or from the side between the lock nut and the wall surface of the main body. Then, when the lock nut is tightened, the hinge piece is sandwiched and fixed between the lock nut and the wall surface of the main body, and the hinge cover is attached to the main body of the hydraulic cutter.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 to 3, the hinge cover 10 is
A hinge type including a cover body 12 and a hinge piece 14 is configured. The cover body 12 is the body of the hydraulic cutter 15.
The fixed cutter 18 attached to the 16 and the movable cutter 22 at the tip of the piston 20 are formed in such a size as to sufficiently cover the upper part (see FIGS. 4 and 5). Further, the cover body 12 is formed so that the state of the pair of cutters 18, 22 and the work piece 24 between them can be visually observed, and in the embodiment, it is formed from a perforated steel plate provided with a large number of pores 11. Has been done.
In this way, if the cover body 12 is molded from a perforated steel plate,
Through the pores 11, the work piece 24 between the pair of cutters can be sufficiently viewed. Further, since the perforated steel sheet has sufficient strength, there is no possibility of breaking. Usually a pair of cutters 18,2
2 is bolted to the body 16 and the piston 20, respectively. The hydraulic cutter 15 has a structure exactly the same as a known one, as will be described later.

As can be seen from FIG. 1, the cover is formed by bending the ends (upper and lower ends, left end) inward in three directions except for one end (right end in FIG. 1). The main body 12 is molded. A hinge piece 14 that secures the swing of the cover body 12 is provided at the open end (right end).
The hinge piece 14 is configured to have a fork-shaped fixed piece 26 fixed to the back surface of the cover body 12 by welding or the like, and a pivotal support piece 28 connected to the fixed piece via a pivotal support pin 27. ing.

The workpiece, for example, the reinforcing bar 24, is loaded into the recess 30 provided on the upper surface of the main body 16 from the front side and disposed between the pair of cutters 18 and 22, as shown in FIG. A stopper bolt 32 is screwed into a screw hole 34 formed in the wall surface 17 of the main body 16 on the side opposite to the fixed cutter 18 with the recess 30 interposed (see FIGS. 5 and 6). The stopper bolt 32 is
The head is lightly screwed to the side surface of the reinforcing bar 24 and is screwed according to the diameter of the reinforcing bar. Then, the lock nut 36 of the stopper bolt is tightened to fix the stopper bolt 32 to the main body 16. In this way, by bringing the side surface of the reinforcing bar 24 into contact with the stopper bolt 32, the escape of the reinforcing bar during cutting is prevented.

The hinge cover 10 of this invention is configured to be attachable to the hydraulic cutter 15 by utilizing the lock nut 36 of the stopper bolt 32 for the stopper. In the illustrated embodiment, as can be seen clearly from FIG. 3, a long hole 38 having a size through which the stopper bolt 32 can be inserted is provided in the pivotal support piece 28 of the hinge cover, and the lower portion of the long hole is opened. The pivotal support piece 28 having the elongated hole 38 having such a shape can be easily inserted into the stopper bolt 32 from above. Before the stopper bolt 32 is fixed to the main body 16 by the lock nut 36, the hinge cover pivot piece 28 is inserted from above the stopper bolt between the lock nut and the wall surface 17 of the main body. Then, when the lock nut 36 is tightened, the pivotal support piece 28 is clamped and fixed between the wall surface 17 of the main body and the lock nut. Also, by tightening the lock nut 36, the stopper bolt 32
At the same time, it is fixed to the main body 16.

By the way, the stopper bolt 32 with the lock nut is merely a component member that is always provided in the hydraulic cutter 15. And
According to this invention, the hinge cover 10 is attached to the hydraulic cutter 15 using the lock nut 36 of the stopper bolt 32. Therefore, no special consideration is required to separately prepare a mounting stopper bolt for mounting the hinge cover 10 or to provide a screw hole in the main body 16 of the hydraulic cutter. Therefore, the hinge cover 10 can be directly attached to a known hydraulic cutter.

Also, tighten the lock nut 36 with the stopper bolt.
This is an operation that is normally performed to fix the 32 at a predetermined position, and is only one of a series of operations performed in the cutting process.
That is, the hinge cover 10 is mechanically attached to the hydraulic cutter 15 in a normal series of movements, and the attachment can be performed extremely quickly and easily, regardless of a special movement for attachment. .

In the configuration in which the hinge cover 10 is attached to the hydraulic cutter 15 using the lock nut 36, the hinge cover 10 is moved from the tip end portion of the main body 16 toward the central portion as shown by the alternate long and short dash line in FIGS. 4 and 5. It is swingably attached to the body of the hydraulic cutter. Here, as shown in FIG. 5, the movable cutter 22 moves forward together with the piston 20 to remove the cutting piece 24a from the reinforcing bar 24.
Suppose that the cutting piece bounces off when the is cut, or the pair of cutters 18 and 22 suddenly breaks for some reason and the broken pieces scatter. The scattered cutting pieces 24a and the broken pieces collide with the hinge cover 10 that covers the upper portions of the cutters 18 and 22, and try to flip up the cover body 12 of the hinge cover. However, the hinge body 12 molded from the perforated steel plate is
Since it has a sufficient weight, it can withstand the collision of the cutting pieces 24a and the fragments, and the hinge body does not easily jump up. Further, since the end portion of the hinge body 12 is bent inward, the bent edge serves as an obstacle to prevent the cut pieces 24a and broken fragments from scattering from the sides of the hinge body. Further, since the pores 11 of the hinge body are sufficiently small and the fragments of the cutter are not allowed to pass through, the fragments do not scatter to the outside of the hinge cover 10 through the pores.

If the cutting piece 24a collides with the broken piece, the hinge body 1
When 2 jumps up, the hinge cover 10 swings toward the center (rearward) of the main body 16 of the hydraulic cutter, that is, in the clockwise direction in FIG. 6 as indicated by the chain double-dashed line. Then, the gap 40 only occurs at the side of the hinge cover 10 in the direction of the tip of the main body 16. Therefore, the cutting piece 24a that collided with the hinge main body 12, the fragment, is bounced off from the hinge main body, even if scattered from the gap 40 to the outside, in the opposite direction to the operator located in the central portion of the main body 16. It does not scatter and hit the operator directly. Therefore, the safety of the operator is ensured, and the cutting work by the hydraulic cutter 10 can be performed with high safety.

The hinge cover 10 is tightly clamped between the lock nut and the wall surface 17 of the main body by tightening the lock nut 36, and is securely fixed. Therefore, there is no possibility that the hinge cover may be detached from the stopper bolt 32 and jumped upward, even though the elongated hole 38 is opened downward.

As shown in FIG. 7, a long hole 39 that is open to the side may be provided in the pivot support piece 28 of the hinge cover. The hinge cover 10 having such a shape is inserted into the stopper bolt from the front side in FIG. 5, not above the stopper bolt 32.
Then, the lock nut 36 is tightened. In this way, before the stopper bolt 32, that is, in the configuration in which the hinge cover 10 is inserted into the stopper bolt from the side,
No matter how strongly the cutting pieces 24a and the broken pieces collide, there is no possibility that the hinge cover 10 will be blown upward from the stopper bolt 32. Therefore, the cutting work can be performed with greater safety.

The above-described embodiments are for explaining the present invention, and are not intended to limit the present invention in any way, and all modifications and alterations within the technical scope of the present invention are also included in the present invention. Needless to say.

[Effect of device]

As described above, according to the present invention, the hinge cover is attached to the hydraulic cutter by using the lock nut of the stopper bolt, which is one of the constituent members that are always included in the hydraulic cutter. Therefore, the hinge cover can be mounted on a known hydraulic cutter as it is without any special consideration such as separately preparing a mounting bolt for mounting the hinge cover or providing a screw hole in the body of the hydraulic cutter.

Further, since the hinge cover is mechanically attached to the hydraulic cutter by tightening the lock nut, which is one of a series of operations performed in the cutting process, the attachment can be performed extremely quickly and easily.

Further, in the configuration in which the hinge cover is attached to the hydraulic cutter using the lock nut, the hinge cover can be swung in the direction of the central portion of the main body of the hydraulic cutter. for that reason,
Even if the cut pieces of the work piece or the broken pieces of the cutter scatter and collide with the cover body and flip up the cover body, the gap is
It occurs on the side of the hinge cover in the direction of the tip of the body, and this gap is located in the direction opposite to the operator of the hydraulic cutter.
Therefore, even if the cutting pieces and broken pieces that collide with the hinge body are bounced off from the hinge main body and even if they fly outside from this gap, the cutting pieces and broken pieces do not hit the operator directly, and the hydraulic cutter The cutting work by can be performed with high safety.

If the hinged piece is formed with a downwardly opened long hole so that the stopper bolt can be inserted from above, the hinge cover can be mounted quickly and easily.

Further, even if the elongated hole having the side opening is formed in the hinge piece so that the stopper bolt can be inserted from the side, the hinge cover can be mounted quickly and easily. In particular, with this configuration, no matter how strongly the cut pieces or broken pieces collide with each other, there is no fear that the hinge cover will be blown upward from the stopper bolt, and the cutting work can be performed with greater safety. .

The cover body is preferably formed from a perforated steel plate, and in such a cover body, the work piece between the pair of cutters can be sufficiently viewed through the pores. Further, since it has sufficient strength, there is no fear that the cover body will be broken. Furthermore, since it has a sufficient weight, it withstands the collision of cut pieces and fragments, and the hinge body does not easily spring up.

[Brief description of drawings]

1 to 3 are partially broken plan views, front views, right side views, and FIG. 4 of a hinge cover for preventing scattering of cut pieces of a hydraulic cutter according to an embodiment of the present invention. FIG. 5 is a front view, a partial plan view, of a hydraulic cutter having a hinge cover for preventing scattering, and FIG. 6 is an operation diagram of the hinge cover for preventing scattering showing swing of the hydraulic cutter on the main body. FIG. 7 is a right side view of a hinge cover for preventing scattering in another embodiment, which is similar to FIG. 10: Hinge cover for preventing scattering of cutting pieces of hydraulic cutter, 110: Cover for preventing scattering of cutting pieces of known hydraulic cutter, 11: Pore of cover body, 12: Cover body, 14:
Hinge piece, 15: Hydraulic cutter, 16: Main body of hydraulic cutter, 17: Wall of main body, 18: Fixed cutter, 20: Piston, 22: Movable cutter, 24: Reinforcing bar (workpiece), 24a:
Cutting piece, 26: Fork-shaped fixing piece of hinge piece, 27: Pivoting pin of hinge piece, 28: Pivoting piece of hinge piece, 30: Recess of body, 32: Stopper bolt, 34: Screw hole on wall surface, 36 : Lock nut, 38, 39: Long hole of hinge piece.

Claims (4)

[Scope of utility model registration request] 1. A cover main body for observing a work piece, which is arranged between a movable cutter at a piston tip of the hydraulic cutter and a fixed cutter provided on the main body of the hydraulic cutter so as to face the movable cutter; And a hinge piece that secures the swinging of the cover body; and the hinge piece is configured to be attachable to the hydraulic cutter by using the lock nut of the stopper bolt that prevents the workpiece from escaping during cutting. Hinge cover to prevent the scattering of cut pieces. 2. A stopper bolt can be inserted from above,
The hinge cover for preventing scattering of cut pieces and the like of a hydraulic cutter according to claim 1, wherein a downwardly opened long hole is formed in the hinge piece. 3. A stopper bolt can be inserted from the side,
The hinge cover for preventing scattering of cut pieces and the like of a hydraulic cutter according to claim 1, wherein a long hole that is opened laterally is formed in the hinge piece. 4. A hinge cover for preventing scattering of cut pieces and the like of a hydraulic cutter according to any one of claims 1 to 3, wherein the cover body is formed of a steel plate with holes.