JP3110890U - Stretchable handle with elliptical cross section and its fixing mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide excellent mechanical stability, to prevent inadvertent dropping from a hand and rotation between components during use, and to easily recognize the horizontality of a plate portion in laying and the like. The present invention provides an extendable handle and a fixing mechanism for a hand tool.
The handle has a function in which the cross-sectional shape thereof is substantially oval or hook-shaped, and the inner pipe is inserted into the outer pipe so as to be movable in the axial direction so that the handle hook can be expanded and contracted. The internal and external pipes are fixed to each other by pivotally connecting a clamp unit made of a member having a cross-sectional shape similar to the cross-sectional shape of the handle.
[Selection] Figure 1

Description

  The present invention mainly relates to a handle rake part of a hand tool such as a pavement rake and a farm tool, an expansion / contraction / fixing mechanism of the handle ridge part, and a shape thereof.

  In rake parts for paving work and farm tools, etc., those that do not have a conventional expansion / contraction function mainly have a circular cross section, those that have an expansion / contraction function, or a part of the cross section, or a slit for preventing rotation, or Some have a weight-like cross section provided with a straight portion, and a clamp unit as a fixing mechanism thereof is configured by employing a member having a shape constraining a generally circular cross section.

In a handle with a circular cross-section that does not have an anti-rotation function, the fixed part between the inner and outer pipes is loosened due to impact, load, working force, etc. during work, resulting in a handle that is centered about the axial direction of the handle Rotation between materials was likely to occur, causing work mistakes.
In addition, even in a handle with a cross-section having a rotation prevention function, the rough cross-sectional shape is circular, so that the slipperiness in the work cannot be improved, and in particular, the leveling work such as asphalt in paving work, This hinders the leveling of the rake plate.

Means to solve the problem

  The cross-sectional shape is a handle that has an approximately oval or hook shape, and the internal pipe is inserted into the outer pipe so as to be movable in the axial direction, so that the handle hook can be expanded and contracted. And a clamp unit made of a member having a cross-sectional shape similar to the cross-sectional shape of the handle heel portion is pivotally mounted on the handle heel portion, and the extensible handle wand in the hand tool and its fixing mechanism It is solved by adopting.

Effect of device

According to the present invention, since the cross-sectional shape of the handle collar portion is a substantially elliptical shape having a major axis and a minor axis, or a collar shape, the anisotropy is easily recognized when grasped compared to a circular section, and the leveling is spread. It is easy to ensure the horizontalness of the plate part during work. In addition, by setting the long axis direction in the cross section to the direction in which the force is frequently applied in the work, that is, the vertical direction with respect to the long side of the plate portion, the strength against the force applied during the work is improved.
Also, compared to a circular cross section, slipping during operation is less likely to occur, and rotation due to looseness of the handle portion itself is less likely to occur.

Best mode for carrying out the invention

  The handle portion is mainly formed by coating a metal such as aluminum with rubber or the like. However, if a predetermined strength is ensured, resin, wood or the like can be used.

  In addition, each component of the clamp unit is mainly formed by placing an alloy mainly made of aluminum and a resin in place, but in the same way as described above, other materials can be used to ensure a predetermined strength. is there.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the telescopic handle rod and its fixing mechanism according to the present invention are mainly constituted by a handle rod portion denoted by reference numeral 1 and a clamp unit denoted by reference symbol 3.

  The structure of the handle portion is formed by inserting an internal pipe denoted by reference numeral 2a into an external pipe denoted by reference numeral 2b having a similar and large-diameter cross-sectional shape so as to be movable in the axial direction.

  As a result, the handle can be adjusted to an optimum length during use depending on the type of work and the conditions of the work place.

  Further, by setting the major axis direction of the cross section of the handle portion to a direction in which the force is frequently applied in the work, the strength against the force applied during the work can be improved.

  Further, as shown in FIG. 3 and FIG. 4, a slit, which is a reference numeral 2c for achieving the fixing function, has a certain length in the vicinity of the pivot portion of the clamp unit, which will be described later, of the outer pipe. Is provided at one location corresponding to the above or two locations on the axis thereof.

  Next, the clamp unit for fixing the handle portion to a predetermined length is pivoted near the inner pipe insertion portion side end of the outer pipe.

  As shown in FIGS. 3 and 4, the cross-sectional shape of the pressing ring 3a constituting the clamp unit as a whole has a substantially elliptical shape similar to the cross-sectional shape of the handle, or a heel shape. It has a substantially C shape in which a slit 4 is formed in part.

  A pair of convex pieces having a lock bolt through-hole indicated by reference numeral 3i, which are indicated by reference numerals 3g and 3h, project from the end portions.

  Since the convex pieces are arranged in parallel at a predetermined interval, a slit 4 is formed between the convex pieces, and the through-holes of the convex pieces have the same central axis. The lock bolt which is the code | symbol 3c which can be can penetrate both through-holes.

  The lock lever denoted by reference numeral 3b is connected to the lock bolt via a connection shaft denoted by reference numeral 3d. The connection shaft is inserted at the lock lever connection side end, and the central axis of the connection shaft is the rotation axis of the lock lever.

  At this time, as shown in FIG. 4, the connecting shaft is inserted at a position eccentric from the center of the arc of the lock lever connecting side end portion having a partially arc-shaped outer shape.

  Therefore, if the lock lever is pulled down in the direction B shown in FIG. 4, the convex piece portion B, which is indicated by reference numeral 3h, is pushed in the direction C by the cam action, and the slit portion, which is indicated by reference numeral 4, is narrowed. The external pipe 2a is firmly attached.

  In addition, since the slit 2c provided on the external pipe is also narrowed simultaneously, the force is transmitted to the internal pipe via the external pipe, and as a result, the internal and external pipes are fixed at predetermined positions.

  At this time, since the cross-sectional shape of the pressing ring is an ellipse or a saddle shape similar to the cross-sectional shape of the handle rod portion, the force is evenly transmitted to the entire circumference of the pipe, and a stable and good fixed state is obtained.

  When releasing the fixed state, if the lock lever is pulled up in the direction shown in FIG. 4, the contact state of the pressing ring and the internal and external pipes can be released by the reverse action.

  In addition to the examples shown in the description and the drawings, as long as they do not depart from the basic configuration and the essential points of the mechanism, various modifications, integration, etc. are possible for the shape, part configuration, or material of those details. They shall be deemed not to depart from the scope of the present invention.

These are the perspective views of the expansion-contraction handle bag and fixing mechanism concerning this invention. These are the top views of the expansion-contraction handle | brown and fixing mechanism concerning this invention. These are the perspective views showing in detail the structure of the expansion-contracted handle bag concerning this invention, and the clamp unit part of a fixing mechanism. These are the detailed cross-sectional views which cut | disconnected the expansion-contraction handle | corrugated handle and fixing mechanism concerning this invention by FIG. 2 AA. These are the reference top views which represented continuously the aspect which the expansion-contraction pattern bag concerning this invention expands / contracts.

Explanation of symbols

1 is a range according to the present invention in a handle part or article 2a is an internal pipe 2b is an external pipe 2c is a slit of an external pipe 3 is a clamp unit 3a is a pressing ring 3b is a lock lever 3c is a lock bolt 3d is a connection shaft 3e Washer A
3f is washer B
3g is convex piece A
3h is convex piece B
3i is the lock bolt through hole 4 is the slit of the pressing ring

Claims (1)

  It is mainly a handle ridge in hand tools such as pavement rakes and farm tools, and the handle ridge has an approximately oval or ridge cross-section, and the inner pipe moves to the outer pipe in the axial direction. The handle has a function to be freely inserted and retractable, and the inner and outer pipes are fixed to each other with a clamp unit made of a member having a cross-sectional shape similar to the cross-sectional shape of the handle. A telescopic handle rod and its fixing mechanism in a hand tool, characterized by being pivoted.

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