JP2017127959A - Hinge pin puller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that, in a maintenance operation of a hinge pin which connects an aileron of an airplane, a rotary vane of a helicopter or the like such that an attachment angle gets to variable, there is no private tool and, therefore, time-consuming operation is required although performing the operation by two combined by using a plier or the like.SOLUTION: A moving function is given by a first clamp 1 and a guide rod 5 doubling as an outer circumferential cover which is set as a protrusive shape and is tightly adhered to an object 6 to be held of a hinge pin or the like, a function for rigidly fixing the object 6 to be held of the hinge pin or the like by a second clamp 2 prepared by setting a part tightly adhered with the object 6 to be held of the hinge pin or the like as a recessed shape and a mechanism which provides a through-hole 7 for fixing a slide hammer onto a main body 3 center part are given and, thereby, even a pulling-out operation of the object 6 to be held of the hinge pin or the like can be performed safely, rapidly and reliably even on a place free from wasteful space.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a maintenance operation for connecting an aileron on a main wing of an airplane or a hinge pin used for a rotor wing of a helicopter with a variable mounting angle.

  Conventionally, auxiliary wings such as an aileron on a main wing of an airplane and a rotor wing of a helicopter are of a type that is rotatably attached by a hinge pin. Since the hinge pin is distorted by G and air resistance during flight, it needs to be replaced periodically.

  For exchanging hinge pins used in airplane ailerons, there was no special tool, and pliers were used.

As a patent for a hinge pin removal tool, a tool applying the principle of nail extraction (for example, Patent Document 1). There exists a thing (for example, patent document 2) etc. with a mechanism which fixes a hinge pin via a socket assembly.
ACT 7-37578 JP2014-18854

  Since the installation location of the hinge is a joint or fulcrum between the members, the hinge is inevitably a narrow space between the surfaces. As shown in Fig. 3, the installation of airplane aileron and helicopter rotor blades is also very narrow, but there is no dedicated tool and pliers etc. are used for work by two people. It took a lot of time to work.

  In places where there is no space where the hinge is fixed in the longitudinal direction in a narrow place, it is not possible to use a large pliers with a strong fixing force that requires space, so after holding the hinge pin with a small pliers, Hold the pliers with large pliers. Further, another worker hits the pliers with a hammer and pulls out the hinge pin.

  Further, in order to apply the principle of nail extraction described in Patent Document 1, since it is limited to a short hinge pin having a nail-like head, it is hinged in the longitudinal direction like an aileron of an airplane (FIG. 3). It is difficult to pinch the hinge pin of the type in which is fixed.

  In addition, the socket method described in Patent Document 2 aims to easily attach and detach the object to be held, and is not suitable for use in a narrow space, which is the purpose of the present invention.

  An object of the present invention is to provide a puller capable of safely and easily pulling out a hinge pin in a narrow space.

  In order to achieve the above object, in the present invention, a thin plate that covers the outer periphery and has a convex shape at a portion that comes into close contact with an object to be held such as a hinge pin, and a moving function is provided by a first clamp having a clamping function and a guide rod. Further, the object to be held, such as the hinge pin, is firmly held by the second clamp part having a concave shape in a portion in close contact with the object to be held, such as the hinge pin. Further, a through hole or a stepped hole for fixing the slide hammer is provided at the center of the main body.

  According to the present invention, the hinge pin can be pulled out safely, quickly and reliably even in a narrow space where there is no space such as an aileron of an airplane or a rotor blade of a helicopter.

It is a perspective view which shows the structure of the hinge pin puller of this invention. It is the schematic which shows the hinge pin pull-out state using the hinge pin puller of this invention. It is the schematic showing the embodiment operation | work form using the hinge pin puller of this invention.

  As shown in FIG. 1, the hinge pin puller of the present invention has a wall surface side clamp mechanism on the outer peripheral cover that covers the main body, and the hinge pin is moved with the second clamp that is movable to the first clamp side by the guide rod that passes through the guide groove. It is a mechanism to fix.

  INDUSTRIAL APPLICABILITY The present invention is used for maintenance of hinge pins that are used in parts that are connected with variable mounting angles, such as airplane ailerons and helicopter rotor blades.

DESCRIPTION OF SYMBOLS 1 1st clamp 2 2nd clamp 3 Main body 4 Guide groove 5 Guide rod 6 To-be-held object, such as a hinge pin 7 Through-hole 8 Fixing bolt 9 Fixing screw

BEST MODE FOR CARRYING OUT THE INVENTION

  In the hinge pin puller of the present invention, as shown in FIG. 1, the first clamp 1 that also serves as an outer peripheral cover is screwed to the main body 3 at four points. The second clamp 2 has a structure in which the guide groove 4 formed in the main body 3 can be changed by tightening two guide rods 5. In addition, a slide hammer or the like can be fixed to the through hole 7.

  The hinge pin puller according to the present invention is not limited to the above embodiment. For example, in the embodiment, the first clamp 1 is screwed to the main body 4 at four points. However, with respect to the number of screws, the main body 3 and the first clamp are firmly fixed to hold an object to be held such as a hinge pin. If possible, the number may be increased or decreased.

  Although the number of guide rods is two, the number of guide rods may be increased or decreased as long as the second clamp can be moved and the object to be held such as a hinge pin can be held.

  This hinge pin puller is not limited to a part that connects an aileron of an airplane or a rotor blade of a helicopter with a variable mounting angle, but can also be used to hold a thin rod in other applications.

Claims (3)

  A portion where the thin plate covering the outer periphery is in close contact with the object to be held, such as a hinge pin, is formed in a convex shape, and a portion that is in contact with the object to be held is provided with a moving function by a guide rod and a guide rod. A hinge pin puller characterized in that the object to be held is firmly held by a concave second clamp part.   The hinge pin puller according to claim 1, wherein a holding force is increased by inserting a recess in a recessed portion that is in close contact with an object to be held such as a hinge pin of the second clamp portion.   3. A hinge pin puller according to claim 1 or 2, wherein a through hole or a stepped hole is provided in the hinge pin puller main body, and a slide hammer or the like can be attached.

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