JP6485938B1 - Impact device - Google Patents

Abstract

To remove hard soil or ice burn safely and easily.
An inner cylinder 4 having a cylindrical shape with an action part provided at one end, an outer cylinder 2 having a cylindrical shape with a grip part 24 provided at one end, and housing the inner cylinder 4 therein, A first spring (spring 51) that urges the inner cylinder 4 in a direction to push the inner cylinder 4 out of the outer cylinder 2, and a hammer portion 61 that is accommodated in the other end of the inner cylinder 4 and is movable in the axial direction of the inner cylinder. The hammer receiving portion 531 provided at the portion where the hammer portion of the inner cylinder 4 abuts, the second spring (spring 63) for urging the hammer portion in the axial direction of the inner cylinder, and when the first spring contracts, A stopper mechanism 55 that locks the hammer portion at a predetermined position of the inner cylinder, and a release that is provided on the outer cylinder and releases the locking of the hammer portion by the stopper mechanism when the first spring is contracted to a predetermined position. Part (inclined part 21).
[Selection] Figure 1

Description

  The present invention relates to an impact device.

  When recovering from underfloor inundation, underfloor inundation, or landslides caused by a disaster, etc., it is necessary to use an excavator in a place where heavy machinery cannot be put in and manually remove the earth and sand.

  In conventional round and square excavators, the excavator is not pierced by various foreign matters such as gravel, stones and driftwood mixed in the earth and sand, and more labor than necessary is required.

  In addition, even when removing snow, an excavator does not stab in a place where the snow that has been squeezed into ice (ice-burn) does not stab, and requires more labor than necessary.

  Conventionally, for example, as an excavator for crushing ice burn or hard soil, for example, there is a technique disclosed in Patent Document 1.

  The technique disclosed in Patent Document 1 includes a scooping body and a handle rod connected to the scooping body, and part or all of the handle rod body is formed to be detachable and removable, and is inserted into the tip of the handle rod body exposed at the time of separation. Protrusions are protruding.

JP 2001-73400 A

  However, in the technique disclosed in Patent Document 1, the width of the piercing portion is the same as that of the rod-shaped handle portion, and thus there is a problem that it takes time when crushing a large area of ice burn or soil. is there.

  Also, in order to increase the crushing force, it is necessary to lift the pierced part high and hit it against the ground, but if the hand is crazy, it may hit the operator's foot directly and cause injury There are also problems.

  This invention is made | formed in view of such a condition, and it aims at providing the impact apparatus which can remove an ice burn or hard soil etc. safely and easily.

In order to solve the above-described problems, the present invention has an inner cylinder having a cylindrical shape in which an action portion is provided at one end, and a cylindrical shape in which a grip portion is provided at one end, and the inner cylinder is accommodated therein. An outer cylinder, a first spring that urges the inner cylinder in a direction to push the inner cylinder out of the outer cylinder, and a hammer portion that is accommodated in the other end of the inner cylinder and is movable in the axial direction of the inner cylinder A hammer receiving portion provided at a portion where the hammer portion in the inner cylinder abuts, a second spring for urging the hammer portion in the axial direction of the inner cylinder, and when the first spring contracts, A stopper mechanism that locks the hammer portion at a predetermined position of the inner cylinder, and a stopper mechanism that is provided on the outer cylinder and that locks the hammer portion by the stopper mechanism when the first spring is contracted to a predetermined position. releasing the has a release portion, wherein the solution If engagement of the hammer portion by the stopper mechanism is released by parts, the hammer portion collides with the hammer receiving portion, impact force due the collision is transmitted to the working portion, characterized in that.
According to such a configuration, it is possible to safely and easily remove ice burn or hard soil.

Further, the present invention is characterized in that the other end of the outer cylinder is provided with a protrusion for an operator to apply force.
According to such a configuration, the operator's force can be efficiently applied to the action portion, so that work can be made efficient.

Further, according to the present invention, a stopper for preventing the inner cylinder from falling off the outer cylinder by being engaged with each other is provided on the outer side of the inner cylinder and the inner side of the outer cylinder. It is characterized by that.
According to such a configuration, the inner cylinder can be reliably held in the outer cylinder, so that the operation can be performed smoothly.

Further, the present invention is characterized in that the retainer further has a function of restricting the inner cylinder from rotating within the outer cylinder.
According to such a configuration, since the rotation of the inner cylinder can be restricted, the operation can be performed smoothly.

Further, the present invention is characterized in that the action portion is constituted by a spoon portion.
According to such a configuration, it is possible to efficiently remove a large area of ice burn or soil.

Further, the present invention is characterized in that a plurality of teeth having a concavo-convex shape is formed at the tip of the spoon portion.
According to such a configuration, the force by the hammer portion is made into a plurality of teeth having an uneven shape, so that work can be performed without piercing an unnecessary soft foreign object (such as a tree) like a saw tooth. Can be performed smoothly.

Further, the present invention is characterized in that the hammer portion is disposed at a position closer to the grip portion than the center of gravity of the impact device, and the hammer portion functions as a counterweight of the spoon portion.
According to such a configuration, the target portion such as soil or ice burn can be transported in a balanced manner by functioning as a counterweight.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the impact apparatus which can remove an ice burn or hard soil etc. safely and easily.

It is a perspective view of an impact device concerning an embodiment of the present invention. 1 is an external view of an impact device according to an embodiment of the present invention. It is an exploded perspective view of an impact device concerning an embodiment of the present invention. It is an enlarged view of the inner cylinder part shown in FIG. FIG. 4 is an enlarged view of the stopper mechanism shown in FIG. 3. It is sectional drawing for demonstrating operation | movement of the impact apparatus which concerns on embodiment of this invention. It is sectional drawing for demonstrating operation | movement of the impact apparatus which concerns on embodiment of this invention. It is sectional drawing for demonstrating operation | movement of the impact apparatus which concerns on embodiment of this invention. It is sectional drawing for demonstrating operation | movement of the impact apparatus which concerns on embodiment of this invention.

  Next, an embodiment of the present invention will be described.

(A) Description of Configuration of Embodiment of the Present Invention FIGS. 1 to 5 are diagrams illustrating a configuration example of an impact device 1 according to an embodiment of the present invention. First, FIG. 1 is a perspective view of the impact device 1. FIG. 2 is an external view of the impact device 1. FIG. 3 is an exploded perspective view of the impact device 1. FIG. 4 is a perspective view of the inner cylinder of the impact device 1. FIG. 5 is a perspective view of the stopper mechanism. Hereinafter, in the embodiment of the present invention, a case where an excavator is configured as the impact device 1 will be described as an example. In the following description, the X, Y, and Z axes are set as indicated by arrows in the figure, and the direction in which the arrow is directed is defined as the plus direction, and the opposite direction of the arrow is defined as the minus direction.

  As shown in FIG. 3, the impact device 1 includes an outer cylinder 2 and an inner cylinder 4 as main components.

  As shown in FIGS. 1 and 2, the outer cylinder 2 has a middle outer cylinder 20, an upper outer cylinder 22, and a lower outer cylinder 23. A lower inner cylinder 40 extends from the bottom of the lower outer cylinder 23, and an action portion 44 is provided at the tip thereof.

  In the embodiment shown in FIG. 1, the action portion 44 is configured as a spoon portion of an excavator. A tooth-like portion 441 having a rectangular uneven shape is formed at the tip of the action portion 44. The action part 44 is made of heat-treated steel, for example.

  The middle outer cylinder 20 and the upper outer cylinder 22 are integrated by connecting their ends to each other through a connecting portion 31. The middle outer cylinder 20 and the lower outer cylinder 23 are integrated by connecting their ends to each other through a connecting portion 33.

  The middle outer cylinder 20 is made of, for example, stainless steel, and is configured by smoothly connecting an upper outer cylinder 22 and a lower outer cylinder 23 having different diameters by an inclined portion 21. In addition, the inclination part 21 applies the force for operating the stopper mechanism 55 so that it may mention later.

  A grip 24 is formed on the upper end of the upper outer cylinder 22 (in the positive direction of the Z axis). The grip portion 24 is formed of, for example, aluminum or resin, and an operator can apply a force by gripping this portion with one hand.

  A pair of protrusions 28 extending in the plus and minus directions of the X axis are provided at the lower end of the lower outer cylinder 23 (minus direction of the Z axis). The protrusion 28 is used when an operator applies a force by putting his / her foot on the foot. The protruding portion 28 is supported by the support portion 261. One end of the support portion 261 is joined to the protruding portion 28, and the other end is fixed to the lower outer cylinder 23 with a screw or is fixed by welding. The lower outer cylinder 23 is made of, for example, aluminum.

  A slip stopper 26 is formed on the outer periphery of the lower outer cylinder 23. When an operator places ice or earth and sand on the action portion 44 to carry it, the operator grips the grip portion 24 with one hand and grips the portion of the anti-slip 26 with the other hand. The lower outer cylinder 23 is made of aluminum, for example.

  As shown in FIG. 3, a partition part 311 that separates the middle outer cylinder 20 and the upper outer cylinder 22 is provided inside the connection part 31 that connects the middle outer cylinder 20 and the upper outer cylinder 22, and the partition part 311. A through-hole 312 is formed at the center of each.

  A partition part 331 that separates the middle outer cylinder 20 and the lower outer cylinder 23 is provided inside the connection part 33 that connects the middle outer cylinder 20 and the lower outer cylinder 23, and a through-hole is formed in the central part of the partition part 331. 332 is formed.

  A guide portion 35 is provided inside the end portion of the lower outer cylinder 23. A through hole 351 is formed at the center of the guide portion 35, and a part of the through hole 351 engages with a convex portion 42 provided in the lower inner cylinder 40 to restrict the rotation of the inner cylinder 4. A recess 352 is formed. The guide portion 35 is made of, for example, resin, and restricts the inner cylinder 4 from shaking in the left-right direction (X-axis direction) and the front-rear direction (Y-axis direction) during work.

  As shown in FIGS. 3 and 4, the inner cylinder 4 is configured such that a lower inner cylinder 40 and an upper inner cylinder 41 are connected to each other at a distal end portion by a connection portion 53. An action portion 44 is provided at the tip of the lower inner cylinder 40. A convex portion 42 is fixed to the lower side of the lower inner cylinder 40 (in the negative direction of the Z axis) by, for example, a screw (not shown). A stopper 45 and a spring stopper 46 are provided above the lower inner cylinder 40 (in the positive direction of the Z axis). The stopper 45 prevents the inner cylinder 4 from coming out of the outer cylinder 2 by a screw for fixing the support portion 261 (a screw provided independently from the support portion 261 when the support portion 261 is welded). regulate. The spring stopper 46 restricts the spring 51 from moving in the direction of the stopper 45.

  A hammer portion 61 is built in the upper inner cylinder 41. The hammer portion 61 includes a hammer body 611, a hammer head 612, a hammer shaft 613, and a shaft end 614. The hammer body 611 is configured by a metal member having a cylindrical shape. The hammer head 612 is provided at the distal end portion of the hammer body 611 and is given a driving force by a spring 63 to transmit an impact force to the hammer receiving portion 531 inside the connecting portion 53 as will be described later. The hammer shaft 613 is inserted into the through hole 312 of the partition part 311 and moves in the through hole 312 in the vertical direction (Z-axis direction). The shaft end 614 is provided at the tip of the hammer shaft 613 and prevents the hammer shaft 613 from falling off in the downward direction (the negative direction of the Z axis). The shaft end 614 and the hammer shaft 613 are each formed with, for example, a male screw and a female screw, and are fixed by screwing them. In addition, the hammer part 61 is comprised with the metal member with large specific gravity.

  Stopper mechanisms 55 for locking the hammer portion 61 at predetermined positions are provided at three locations outside the upper inner cylinder 41. FIG. 5 is a detailed configuration example of the stopper mechanism 55. As shown in FIG. 5, the stopper mechanism 55 includes a stopper arm 551, a rotation shaft 552, a bearing portion 553, and a torsion spring 554.

  The stopper arm 551 has a rotation shaft 552, and is fixed rotatably by inserting the rotation shaft 552 into the bearing portion 553. A claw portion 551 a is formed at the tip of the stopper arm 551, and the claw portion 551 a enters the inside of the upper inner cylinder 41 from the opening 471 of the upper inner cylinder 41. The stopper arm 551 is applied with a force in a direction toward the inside of the upper inner cylinder 41 by a torsion spring 554. The claw portion 551a engages with the lower end of the hammer body 611, whereby the hammer body 611 is locked by the claw portion 551a.

  FIG. 6 is a cross-sectional view of the impact device 1. As shown in FIG. 6, the impact device 1 is in a state in which the inner cylinder 4 is incorporated inside the outer cylinder 2.

  The lower inner cylinder 40 is inserted through a through hole 351 of a guide part 35 disposed at the end of the lower outer cylinder 23. Further, the convex portion 42 of the lower inner cylinder 40 is engaged with the concave portion 352 of the guide portion 35. This restricts the lower inner cylinder 40 from moving in the front-rear direction (Y-axis direction) and the left-right direction (X-axis direction) in the lower outer cylinder 23, and prevents the lower inner cylinder 40 from rotating. regulate.

  The stopper 45 is disposed inside the lower outer cylinder 23 and is fixed by a screw for fixing the support portion 261 (a screw provided independently from the support portion 261 when the support portion 261 is welded). Movement in the downward direction (minus direction of the Z axis) is restricted.

  The spring 51 is disposed between the spring stopper 46 and the partition portion 331. When the lower inner cylinder 40 is moved upward, the spring stopper 46 is also moved upward, the spring 51 is compressed, and a restoring force is generated.

  The hammer portion 61 is disposed in the upper inner cylinder 41 and is movable in the Z-axis direction. The spring 63 is disposed between the hammer body 611 and the partition part 311 and biases the hammer part 61 in the Z-axis direction.

  Note that, when the spring 63 and the spring 51 are compared, the spring 51 is configured to have a weaker elastic force than the spring 63. Thereby, it is possible to reduce the force required when applying pressure with a hand or a foot, and to easily hook the claw portion 551a onto the hammer portion 61 and return it.

  The hammer shaft 613 is inserted into the through hole 312 of the partition part 311 and is held so as to be movable in the Z-axis direction. Since the shaft end 614 has a diameter larger than that of the through hole 312 of the partition part 311, the hammer shaft 613 is prevented from falling off the through hole 312.

(B) Description of Operation of the Embodiment of the Present Invention Next, the operation of the embodiment of the present invention will be described. For example, in a state where the tooth-like portion 441 of the impact device 1 is in contact with the ground, when the operator grips the grip portion 24 and lifts it from the ground, the inner cylinder 4 is moved in the negative direction of the Z axis by the elastic force of the spring 51. The outer cylinder 2 is moved in the positive direction of the Z axis.

  As described above, since the shaft end 614 has a larger diameter than the through hole 312 of the partition part 311, when the inner cylinder 4 is moved in the negative direction of the Z axis and the outer cylinder 2 is moved in the positive direction of the Z axis. As shown in FIG. 6, the hammer portion 61 is moved in the positive direction of the Z axis. When the lower end portion of the hammer body 611 of the hammer portion 61 is positioned above the claw portion 551a of the stopper mechanism 55 (in the positive direction of the Z axis), the stopper arm 551 is moved to the center of the upper inner cylinder 41 by the torsion spring 554. Moved towards. As a result, the claw portion 551a is caught by the lower end portion of the hammer body 611. For example, as shown in FIG. 7, the hammer portion 61 is locked by the claw portion 551a. In addition, the example of FIG. 7 has shown the state which the pressure was applied with respect to the outer cylinder 2, and the spring 63 contracted so that it may mention later. In a state where no pressure is applied to the outer cylinder 2 (a state where no pressure is applied to the grip portion 24 and the projection portion 28), the spring 63 is not in contact with the partition portion 311 (a state where the spring 63 is not contracted). It has become.

  Next, the operator brings the toothed portion 441 at the tip of the action portion 44 into contact with, for example, an ice burn formed on the ground surface, and faces downward with respect to the protruding portion 28 (minus direction of the Z axis). When this force is applied, the outer cylinder 2 is moved in the negative direction of the Z-axis while the inner cylinder 4 is stationary. At this time, the spring 63 is compressed between the partition 311 that moves in the negative direction of the Z-axis and the hammer body 611, and stores an elastic force.

  When the inclined portion 21 of the outer cylinder 2 moves to the position of the upper end portion of the stopper arm 551 of the stopper mechanism 55, the inclined portion 21 applies a force toward the center direction to the upper end portion of the stopper arm 551. As a result, as shown in FIG. 8, the locking of the hammer body 611 by the claw portion 551a is released.

  When the locking of the hammer body 611 by the claw portion 551a is released, the elastic force stored in the spring 63 is released at a stretch. As a result, the hammer portion 61 moves vigorously in the negative direction of the Z-axis by the elastic force of the spring 63 and the gravitational acceleration applied to the hammer portion 61, and as shown in FIG. It collides with the receiving portion 531.

  The impact force caused by the hammer head 612 colliding with the hammer receiving portion 531 is transmitted to the tooth-like portion 441 of the action portion 44 via the lower inner cylinder 40. As a result, since the impact force is transmitted from the tooth-like portion 441 to, for example, an ice burner, a crack or the like can be generated in a strong ice burner.

  When the operator further applies a force to the protrusion 28, the outer cylinder 2 further moves in the negative direction of the Z-axis. For example, as shown in FIG. It will be in the state contact | abutted. As a result, since the outer cylinder 2 and the inner cylinder 4 are in contact with each other, the force applied by the operator is transmitted to the action portion 44 without any surplus, and the cracked ice burn can be crushed, for example. .

  When the ice burner is crushed, the operator grasps the grip portion 24 with one hand, grasps the anti-slip 26 of the lower outer cylinder 23 with the other hand, and lifts the crushed pieces by the action portion 44. And move it to the desired location. At this time, when the action portion 44 is freely movable in the Z-axis direction, the inner cylinder 4 is moved in a direction extending to the outside of the outer cylinder 2 by the elastic force of the spring 51, and the partition portion 311. As a result, the shaft end 614 is moved in the positive direction of the Z-axis. As a result, the hammer portion 61 is locked by the stopper mechanism 55.

  When the hammer portion 61 is locked, the hammer portion 61 functions as a counterweight of the action portion 44, so that the operator can smoothly move the crushed pieces to a desired place without applying a large force. it can.

  Subsequently, when the tooth-like portion 441 at the tip of the action portion 44 is brought into contact with the ice burn again and a force is applied to the protrusion portion 28 with a foot, the outer tube 2 is moved to Z while the inner tube 4 is stationary. It is moved in the negative direction of the axis. As a result, the spring 63 is compressed, and an elastic force is accumulated in the spring 63. When the inclined portion 21 is moved to the position of the stopper arm 551, the inclined portion 21 applies a force in the center direction (inward) to the upper end portion of the stopper arm 551, and the hammer body 611 is locked by the claw portion 551a. Is released, and the ice burn can be crushed by the impact force of the hammer portion 61.

  As described above, according to the embodiment of the present invention, the hammer portion 61 is driven by the elastic force of the spring 63 and the impact force is transmitted to the action portion 44 via the hammer receiving portion 531. , Iceburn can be crushed with little force. Thereby, an operator's burden can be reduced.

  Further, the hammer portion 61 operates and generates an impact force when a force is applied to the protruding portion 28 in a state where the tooth-like portion 441 is in contact with the ground. , It is possible to avoid the worker from hurting his / her own foot.

  In addition, when the crushed pieces are moved to a predetermined position by the action portion 44, the hammer portion 61 functions as a counterweight, so that the crushed pieces can be smoothly moved with a small force.

  Moreover, since the hammer part 61 does not operate | move in the case of soft soil, it can also be used similarly to a normal shovel.

(B) Description of Modified Embodiment The above embodiment is an example, and it is needless to say that the present invention is not limited to the case described above. For example, in the above example, the action part 44 is configured as a spoon part of an excavator, but may be configured other than this. For example, instead of the spoon, a piercing portion whose tip is sharply processed may be provided. Further, instead of the tooth-shaped portion 441 having a rectangular shape, for example, it is possible to use a spoon portion having a flat tip portion or a spoon portion having a sharp tip portion as in a normal shovel. It is.

  In the above embodiment, the protrusion 28 is provided at the lower end of the lower outer cylinder 23 and force is applied by the operator's feet. You may make it apply force by hand.

  Moreover, in the above embodiment, the shape of the hammer part 61 is an example, and you may make it have shapes other than this.

  Further, in the above embodiment, the locking of the hammer portion 61 by the stopper mechanism 55 is released by the inclined portion 21, but a configuration other than the inclined portion 21 (for example, a protruding portion protruding inside the middle outer cylinder 20). ) May be used for release.

  Further, the impact force by the hammer portion 61 may be adjustable by configuring the partition portion 311 so that the position in the Z-axis direction can be adjusted from the outside of the outer cylinder 2.

  Further, when the spring 63 and the spring 51 are compared, the case where the elastic force of the spring 51 is weak has been described as an example. However, depending on the case, these elastic forces are equal or the elastic force of the spring 51 is increased. It may be set.

  Also, as shown in FIG. 3, the stopper 48 is provided at the upper end portion of the upper inner cylinder 41. However, in view of ease of assembly in the manufacturing process, the stopper 48 may not be provided. Good. In this case, in FIG. 8, the upper end portion of the upper inner cylinder 41 is in contact with the partition portion 311, and the outer cylinder 2 and the inner cylinder 4 are in contact with each other. The ice burn that has been transmitted to the action unit 44 and has cracked can be crushed, for example.

  Similarly, by configuring the partition portion 331 in the Z-axis direction to be adjustable from the outside of the outer cylinder 2, the force applied before the hammer portion 61 is activated may be adjustable.

DESCRIPTION OF SYMBOLS 1 Impact device 2 Outer cylinder 4 Inner cylinder 20 Middle outer cylinder 21 Inclined part 22 Upper outer cylinder 23 Lower outer cylinder 24 Grip part 26 Non-slip 28 Protrusion part 31 Connection part 33 Connection part 35 Guide part 40 Lower inner cylinder 41 Upper inner cylinder 42 Protruding part 44 Action part 45 Retaining stopper 46 Spring stopper 51 Spring 53 Connecting part 55 Stopper mechanism 61 Hammer part 63 Spring 261 Support part 311 Partition part 312 Through hole 331 Partition part 332 Through hole 351 Through hole 352 Concave part 441 Tooth part 471 Opening portion 531 Hammer receiving portion 551 Stopper arm 551a Claw portion 552 Rotating shaft 553 Bearing portion 554 Torsion spring 611 Hammer body 612 Hammer head 613 Hammer shaft 614 Shaft end

Claims (7)

An inner cylinder having a cylindrical shape with an action portion provided at one end;
An outer cylinder having a cylindrical shape with a grip portion provided at one end, and housing the inner cylinder inside;
A first spring that biases the inner cylinder in a direction of pushing out the outer cylinder;
A hammer portion housed in the other end of the inner cylinder and arranged to be movable in the axial direction of the inner cylinder;
A hammer receiving portion provided in a portion where the hammer portion in the inner cylinder abuts,
A second spring for urging the hammer portion in the axial direction of the inner cylinder;
A stopper mechanism for locking the hammer portion at a predetermined position of the inner cylinder when the first spring contracts;
A release portion that is provided on the outer cylinder and releases the locking of the hammer portion by the stopper mechanism when the first spring is contracted to a predetermined position ;
When the locking of the hammer portion by the stopper mechanism is released by the release portion, the hammer portion collides with the hammer receiving portion, and an impact force due to the collision is transmitted to the action portion.
Impact device characterized by that.   The impact device according to claim 1, wherein a projecting portion for an operator to apply force is provided at the other end of the outer cylinder.   The outer cylinder and the outer cylinder are provided with a stopper for preventing the inner cylinder from falling off the outer cylinder by engaging with each other. Item 3. The impact device according to Item 1 or 2.   The impact device according to claim 3, wherein the retainer further has a function of restricting the inner cylinder from rotating within the outer cylinder.   The impact device according to any one of claims 1 to 4, wherein the action portion is constituted by a spoon portion.   The impact device according to claim 5, wherein a plurality of teeth having a concavo-convex shape is formed at a tip of the spoon portion. The impact according to claim 5 or 6, wherein the hammer portion is arranged at a position closer to the grip portion than a gravity center position of an impact device, and the hammer portion functions as a counterweight of the spoon portion. apparatus.