JP6499141B2 - Vibro compactor - Google Patents

Description

  The present invention relates to a vibro compactor that compacts the ground or the like by vibration, and more particularly, to a vibration isolation structure of a connection portion between a handle column and an airframe in the vibro compactor.

  A typical vibrator compactor is configured such that a handle post connected to the rear part of the fuselage protrudes obliquely upward on the rear side of the fuselage, and an operation handle part (handle) disposed at the upper rear side of the handle post. The machine body can be operated by gripping a grip, a throttle lever or the like.

Japanese Patent Laid-Open No. 11-36219

  By the way, during operation of the Vibro compactor, corresponding vibrations are generated by the vibrator mounted on the fuselage, so the lower end of the handle post and the connection part of the fuselage, more specifically, rotation of the handle post. An anti-vibration material (anti-vibration rubber) is placed between the support bolt (supported and fixed on the machine side) and the handle post, and transmitted from the machine to the operator via the handle post. Vibration can be reduced as much as possible.

  However, the vibration transmitted to the operator cannot be sufficiently reduced only by disposing the vibration isolating material between the support bolt and the handle column, and further vibration reduction measures are required.

  The present invention is intended to solve such a problem in the prior art, and the vibration transmitted to the operator can be reduced more effectively than in the prior art with only a simple component configuration. An object is to provide a vibro compactor.

  In the vibrator compactor according to the present invention, the lower end portion of the handle column is connected so as to be rotatable around a support bolt fixed to the rear portion of the machine body, and the column side stopper comes into contact with the machine body side stopper, thereby The support column is restricted from turning downward and can be maintained in an inclined posture in which the handle column extends obliquely upward from the support bolt toward the rear side of the fuselage. The strut-side stopper abutment surface is abutted against a vertical surface (a surface that is within a range of vertical ± 5 ° when the airframe is self-supporting on a horizontal plane). It is characterized by that.

  In this vibrator compactor, the cylindrical anti-vibration rubber holder has a central axis line at the lower end of the handle column, and the left and right protruding portions protrude left and right of the handle column. A notch recess having an arc-shaped portion concentric with the anti-vibration rubber holder and having a diameter larger than that of the support bolt is formed on the inner side of the anti-vibration rubber holder in the lower end portion of the handle column. Anti-vibration rubber is inserted into the inner part and the right-side protruding part, and a support bolt fixed to the rear part of the fuselage is inserted into a through-hole formed in the center of the anti-vibration rubber. It is preferable that a notch recess is formed at a position where the anti-vibration rubber is deformed and the support bolt contacts when pushed down obliquely downward on the rear side of the machine body.

  The strut-side stopper is preferably fixed at a position below the left protrusion and the right protrusion of the anti-vibration rubber holder, and at least one each on the left and right of the lower end of the handle strut. It is preferable that they are arranged.

  In the vibrator compactor according to the present invention, in the inclined posture of the handle column, the contact surface of the column side stopper is in contact with the vertical surface of the machine body side stopper in a vertical state. The vertical vibration component transmitted from the body side to the handle post during use can be greatly reduced.

  Also, in this Vibro compactor, when the upper end side of the handle post is pushed down obliquely downward on the rear side of the fuselage, the anti-vibration rubber is deformed and the notch recess of the handle post is formed at the position where the support bolt contacts This eliminates the “play” between the handle column and the aircraft in an emergency or the like, and makes it possible to accurately control the aircraft.

  Furthermore, when the strut-side stopper is configured to be fixed at a position below the left protrusion and the right protrusion of the anti-vibration rubber holder, when the upper end side of the handle strut is pushed down obliquely downward on the rear side of the fuselage The layout in which the vibration isolating rubber is deformed and the support bolt contacts the notch recess of the handle post can be suitably realized. In addition, when the strut-side stopper is arranged at least one by one on the left and right of the lower end of the handle strut, the handle strut can be prevented from twisting in the left-right direction, improving operability, It also contributes to reducing vibration in the direction.

FIG. 1 (1) is a perspective view of a lower end portion of a handle post 2 in a vibrator compactor according to the present invention, and FIG. 1 (2) is a cutaway view of a vibration isolating rubber holder 3 fixed to the lower end portion of the handle post 2. It is a figure which shows the state which lacked. 2 (1) is a side view of the lower end portion of the handle column 2 shown in FIG. 1, and FIG. 2 (2) is a sectional view thereof. FIG. 3 is a view showing a connection state between the body of the vibrator compactor according to the present invention and the lower end portion of the handle column 2. FIG. 4 is a side view of the handle post 2 and the fuselage base 8 shown in FIG.

  In the vibrator compactor according to the present invention, the lower end portion of the handle column is connected so as to be rotatable around a support bolt fixed to the rear portion of the machine body, and the column side stopper comes into contact with the machine body side stopper, thereby The support column is configured so that the downward rotation of the support column is restricted, and an inclined posture in which the handle support column extends obliquely upward from the support bolt toward the rear side is configured.

  Hereinafter, a specific configuration of a vibrator compactor according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of a lower end portion of a handle post 2 in a vibrator compactor according to the present invention, and FIG. 2 is a side view and a cross-sectional view of the lower end portion of the handle post 2. As shown in these drawings, a cylindrical anti-vibration rubber holder 3 is provided at the lower end of the handle post 2 so that the center axis is horizontal and both ends protrude to the left and right of the handle post 2. So that it is fixed.

  Cylindrical anti-vibration rubbers 4 and 4 having outer diameters corresponding to the inner diameters of the anti-vibration rubber holders 3 are provided on the inner sides of the left and right protruding portions (the left protruding portion 3a and the right protruding portion 3b) of these anti-vibration rubber holders 3. Are inserted respectively. Through-holes 4a and 4a having inner diameters corresponding to the outer diameters of support bolts (not shown) that are the rotation centers of the handle columns 2 are formed at the centers of the vibration-proof rubbers 4 and 4, respectively. .

  The stopper plate 5 is fixed to the lower end of the handle column 2 at a position below the left protrusion 3 a and the right protrusion 3 b of the anti-vibration rubber holder 3. The stopper plate 5 has rubber post-side stoppers 6, 6, one on each of the left and right sides of the lower end of the handle post 2, with a predetermined interval (interval corresponding to the lateral width of the handle post 2). It is attached. Further, as shown in FIG. 1 (2), notch recesses 2 a and 2 a having arcuate portions concentric with the anti-vibration rubber holder 3 at the inner side of the anti-vibration rubber holder 3 in the lower end portion of the handle post 2. Is formed.

  FIG. 3 is a view showing a connection state between the body of the vibrator compactor according to the present invention and the lower end portion of the handle column 2. As shown in this figure, anti-vibration rubbers 4 and 4 are respectively inserted into the left protrusion 3a and the right protrusion 3b of the anti-vibration rubber holder 3, and through-holes 4a and 4a of these anti-vibration rubbers 4 and 4 are inserted. A support bolt 7 is inserted into 4a. Both ends of the support bolt 7 are horizontally supported by a pair of handle brackets 9, 9 erected on the body base 8, and the handle column 2 can be rotated about the horizontal support bolt 7. Supported by the state.

  FIG. 4 is a side view of the handle post 2 and the fuselage base 8 shown in FIG. (In this figure, the handle brackets 9 and 9 and the nut 10 shown in FIG. 3 are not shown.) As shown, the handle formed inside the anti-vibration rubber holder 3 The notch recess 2a of the support column 2 is set so that the diameter of the arc-shaped portion is larger than the diameter of the support bolt 7 inserted in the vibration isolating rubber 4, so that the normal operation of the vibrator compactor is basically The notch recess 2a (handle column 2) does not come into contact with the support bolt 7, and the vibration transmitted from the machine body to the handle column 2 via the support bolt 7 is attenuated by the vibration-proof rubber 4 having elastic force. become.

  The handle column 2 is supported so as to be rotatable about the support bolt 7 as an axis. The rotation range is fixed to the machine body side stopper 11 provided on the machine body base 8 and the handle column 2. It is regulated by abutting against the post-side stopper 6 that is in contact.

  More specifically, the handle column 2 is set up vertically above the support bolt 7 as shown by a one-dot chain line in FIG. 4 so that the occupied space can be reduced when the vibrator compactor is stored or moved. 4 (or the forward tilted state in which the upper end side of the handle column 2 is inclined forward of the body rather than the support bolt 7). On the other hand, when the vibrator compactor is used, as shown by the solid line in FIG. 2 can be in a state (inclined posture) extending obliquely upward from the support bolt 7 to the rear side (right side in FIG. 4) of the airframe. Then, as shown in the figure, when the column-side stopper 6 comes into contact with the body-side stopper 11, the downward rotation of the handle column 2 is restricted, and this inclined posture is basically maintained.

  In the conventional vibrator compactor, a stopper (machine body side stopper and column side stopper) for maintaining such an inclined posture of the handle column is shown in FIG. 2 of Patent Document 1 (Japanese Patent Laid-Open No. 11-36219). Because of this, it is configured to abut with an inclined surface of about 45 ° (with respect to the inclined surface of about 45 ° on the airframe side stopper with the abutment surface of the support side stopper inclined). The vertical component of vibration that occurs during use is transmitted from the machine body side to the handle column via these stoppers, and is transmitted to the operator from the operation handle portion arranged at the upper rear end of the handle column. was there

  On the other hand, in the vibro compactor according to the present embodiment, as shown in FIG. 4, the contact surface of the column side stopper 6 is perpendicular to the vertical surface of the machine body side stopper 11 in the inclined posture of the handle column 2. Since it is configured to abut in a state, the vertical vibration component transmitted from the body side to the handle column 2 when using the vibro compactor can be greatly reduced.

  In this embodiment, the rubber post-side stopper 6 is configured to come into contact with the metal body-side stopper 11, but the metal post-side stopper 11 is in contact with the rubber-made body side stopper 11. The side stopper 6 may be configured to abut, and both the machine body side stopper 11 and the column side stopper 6 may be made of rubber.

  By the way, when an operator operates the aircraft by grasping an operation handle portion (handle grip, throttle lever, etc.) disposed at the upper end of the handle column 2, vibration isolation is provided between the operation handle portion and the aircraft. Depending on the elastic force of the rubber 4, so-called “play” occurs. During normal operation of the Vibro compactor, there is no problem even if there is some such “play”, but if the width of “play” is too large, not only will the operability deteriorate, but in an emergency, etc. There is a problem when the aircraft needs to be precisely controlled.

  In the present embodiment, as described above, notch recesses 2a and 2a having arcuate portions concentric with the vibration isolating rubber holder 3 are formed in the inner portion of the vibration isolating rubber holder 3 in the lower end portion of the handle post 2. The support bolt 7 on the side of the machine body that is the center of rotation of the handle column 2 is inserted into the cutout recesses 2a and 2a of the handle column 2 in a non-contact state. Then, from the tilted posture of the handle column 2 shown by the solid line in FIG. 4 (the column-side stopper 6 is in contact with the machine-side stopper 11 and the downward rotation of the handle column 2 is restricted), the handle column 2 When the upper end side (operation handle part) is pushed downward toward the rear side of the fuselage (direction perpendicular to the longitudinal direction of the handle column 2), the anti-vibration rubber 4 is deformed and the column side stopper 6 is deformed. Cutout recesses 2a and 2a are formed at positions where the support bolt 7 comes into contact.

  For this reason, when an operator performs an operation of pushing down the operation handle portion arranged at the upper end of the handle column 2 in a specific direction in an emergency, the “play” between the handle column 2 and the machine body (support bolt 7). ”Disappears, and the aircraft can be accurately controlled.

2: Handle column,
2a: notch recess,
3: Anti-vibration rubber holder,
3a: left side protrusion,
3b: right side protrusion,
4: Anti-vibration rubber,
4a: a through hole,
5: Stopper plate
6: Strut side stopper,
7: Support bolt,
8: Aircraft base,
9: Handle bracket,
10: nut,
11: Airframe side stopper,

Claims (4)

The lower end of the handle post is pivotably connected around a support bolt fixed to the rear part of the fuselage, and the handle post stopper is brought into contact with the fuselage side stopper to rotate the handle post downward. In a vibrator compactor configured to be able to maintain an inclined posture in which the handle column extends from the support bolt toward the diagonally upward rear side of the body,
A vibrator compactor configured so that a contact surface of a support-side stopper is in contact with a vertical surface of an airframe-side stopper in a state where the handle support column is inclined. A cylindrical anti-vibration rubber holder is fixed to the lower end portion of the handle column so that the central axis is horizontal, and the left and right protruding portions protrude to the left and right of the handle column,
Of the lower end portion of the handle post, a notch recess having an arc-shaped portion that is concentric with the vibration-proof rubber holder and has a larger diameter than the support bolt is formed on the inner portion of the vibration-proof rubber holder.
Anti-vibration rubber is inserted inside the left and right protrusions,
In the through hole formed in the center of the anti-vibration rubber, a support bolt fixed to the rear part of the aircraft is inserted,
The anti-vibration rubber is deformed when the upper end side of the handle post is pushed down obliquely downward on the rear side of the fuselage, and a notch recess is formed at a position where the support bolt contacts. The vibro compactor according to 1.   The vibro compactor according to claim 2, wherein the strut side stopper is fixed at a position below the left protrusion and the right protrusion of the anti-vibration rubber holder.   The vibro compactor according to any one of claims 1 to 3, wherein at least one strut-side stopper is disposed on each of the left and right sides of the lower end portion of the handle strut at an interval.

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