JPH0539201U - Hand tool handle - Google Patents

Abstract

(57) [Summary] [Purpose] The length of the handle can be adjusted, and mud or rainwater can be prevented from entering the inner and outer cylinders from the position where the length is maintained. It is possible to prevent a decrease in rigidity and to maintain the length adjustment state satisfactorily for a long period of time without rattling. [Structure] Inner cylinder 3 to which one of the hand tool 2 and the grip 4 is mounted
On the outer peripheral surface of the inner cylinder 3, the detent recess 3 extending in the longitudinal direction of the inner cylinder 3.
1 and a plurality of detent recesses 32 that are recessed at predetermined intervals in the length direction of the inner cylinder 3, while the outer cylinder 1 on which the other of the hand tool 2 or the grip 4 is mounted is provided with the rotation stopping recess. 31
A plurality of locking bodies 7 each having an engagement projection 6 that engages with the engaging portion 71 that engages with the detent recess 32, and that is elastically displaceable radially inward with respect to the outer cylinder 1. And a nut body 8 having a pressing portion 81 that engages with the locking body 7 and elastically displaces the locking body 7 is screwed to the outer cylinder 1 and the outer cylinder 1 and the inner cylinder. 3, the length of the locking body 7 is adjustable, and the locking body 7 is pressed against the detent recess 32 by the nut body 8 to maintain the length adjustment state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a handle for a hand tool such as a scoop, shovel, rake, and ho.

[0002]

[Prior art]

 In general, this type of handle is formed into a predetermined length by one piece of wood or one metal pipe as shown in Japanese Patent Publication No. 60-55276, and a hand tool is attached to one end of the handle. A grip is attached to the end, and the grip and the intermediate portion of the handle are gripped so that a predetermined work can be performed.

The applicant of the present invention, as shown in FIG. 7, elastically supports an inner cylinder B having a grip at one end in an outer cylinder A having a manual tool attached at one end. A plurality of locking holes C are formed on one side of the inner cylinder B in the circumferential direction at predetermined intervals in the lengthwise direction, and the locking holes C are formed on one side of the outer cylinder A in the circumferential direction. By providing a locking claw D capable of advancing and retreating, the locking claw D is constantly urged in the direction of the locking hole C, and the locking claw D is pressed to operate the locking claw D. After releasing the engagement with the locking hole C, the outer cylinder A and the inner cylinder B can be expanded and contracted, and after adjusting the entire length, the operation of the locking claw D is released. Previously, there was proposed one in which the locking claw D is engaged with another arbitrary locking hole C so that the adjusted state can be maintained accurately (Japanese Patent Application No. 1-147960).

[0004]

[Problems to be solved by the device]

 However, in the previously proposed handle, since the inner cylinder B is provided with a number of locking holes C along the length direction, the inner cylinder B is extended with respect to the outer cylinder A, and the entire handle When the length is adjusted to be long, there is a problem that the locking hole C is exposed to the outside of the outer cylinder A, and mud or rainwater enters the inner cylinder B through the exposed locking hole C. Since the inner cylinder B is provided with a plurality of the locking holes C described above, there is a problem that the rigidity of the inner cylinder B is particularly lowered, and the locking claw D is formed on one side of the outer cylinder A in the circumferential direction. However, since it is only urged to move forward and backward with respect to the locking hole C, rattling easily occurs between the outer cylinder A and the inner cylinder B, and the rattling causes the rattling described above. There was a problem that the durability of the locking claw D and the durability of the entire handle was poor because the locking claw D was heavily worn.

The present invention has been made in view of the above problems, and an object thereof is to allow the length of the handle to be adjusted and to prevent mud or rainwater from entering the inner cylinder and the outer cylinder from a position where the length is maintained. In addition to preventing entry, it is possible to prevent lowering of rigidity of the inner cylinder and the outer cylinder, but it is possible to provide a handle for a manual tool that can improve durability of a member that maintains a length adjustment state. There is a point in doing so.

[0006]

[Means for Solving the Problems]

 Therefore, the present invention provides an outer cylinder 1 on which one of the hand tool 2 and the grip 4 is mounted, and an inner cylinder 3 on which the other one of the hand tool 2 or the grip 4 is mounted so as to be extendable and contractible in the outer cylinder 1. And a detent recess 31 extending in the lengthwise direction of the inner cylinder 3 and a plurality of detent recesses recessed at predetermined intervals in the lengthwise direction of the inner cylinder 3. 32 is provided, while the outer cylinder 1 has an engagement projection 6 that engages with the rotation stopping recess 31 and an engagement portion 71 that engages with the detent recess 32, and A plurality of locking bodies 7 that are elastically displaceable radially inward are provided, and a pressing portion 81 that engages with the locking bodies 7 and elastically displaces the locking bodies 7 is provided on the outer cylinder 1. The nut body 8 having the above is screwed.

[0007]

[Action]

 Since the inner cylinder 3 is provided with the detent recess 31 and the detent recess 32, that is, because it does not have a locking hole to prevent the inner cylinder 3 from moving, the length of the handle is adjusted to be long. However, it is possible to prevent mud or rainwater from entering the inner cylinder 3 through the detent recess 32. Further, since the inner cylinder 3 is only provided with a recess and is not provided with a locking hole, It is possible to prevent the rigidity of the inner cylinder 3 from decreasing. Further, the plurality of locking bodies 7 provided on the outer cylinder 1 are elastically displaceable in the radial direction of the outer cylinder 1, and the locking bodies 7 are pressed against the detent recesses 32 by the nut bodies 8 to make Since the adjusted state is maintained, it is possible to prevent the rattling between the locking body 7 and the inner cylinder 3, and also to reduce the wear of the locking body 7, so that the length adjusted state can be maintained for a long time. It is possible to maintain good quality for a long time.

[0008]

【Example】

 1 to 6, 1 is an outer cylinder made of a metal pipe having a scoop, shovel, rake, and hoe manual tool 2 attached at one end, and 3 is an inner cylinder having a grip 4 attached at one end. 3 is telescopically inserted and supported in the outer cylinder 1.

As shown in FIGS. 1 and 6, the outer peripheral surface of the inner cylinder 3 is provided with a belt-shaped detent recess 31 in which one side thereof is recessed radially inward and extends in the length direction of the inner cylinder 3. In addition to the provision, a plurality of detent recesses 32 which are recessed in an annular shape are provided at predetermined intervals in the length direction. The detent recess 32 is preferably provided in an annular shape, but may be provided in a gap or may be formed in a substantially C shape.

Further, as shown in FIGS. 1 and 2, the outer cylinder 1 is formed to have a diameter that is approximately the same as the thickness of the inner cylinder 3 and has a small diameter fit inside the outer cylinder 1 inside the free end thereof. A cylindrical adapter 5 made of synthetic resin, which has a joint portion and a large diameter portion which is continuous with the fitting portion and which projects outward from the free end of the outer cylinder 1, is attached to the inner periphery of the adapter 5. Further, the inner cylinder 3 is supported.

As shown in FIG. 1, the adapter 5 is provided with a protrusion-like engaging projection 6 that engages with the rotation-stopping concave portion 31 on one side of the inner peripheral surface thereof, and the tip end of the adapter 5 as shown in FIG. A plurality of split grooves 51 extending in the axial direction from the end edges are provided at predetermined intervals in the circumferential direction, and a plurality of split grooves 51 having engaging portions 71 that engage with the detent recesses 32 are provided between the split grooves 51. A number of locking bodies 7 are formed so as to be elastically displaceable in the radial direction.

The locking body 7 is provided with the engaging portion 71 projecting inward on the inner side of the tip end thereof, and a pressure receiving surface 72 inclined toward the center side on the outer side of the tip end.

In the large-diameter portion of the adapter 5, the rear outer peripheral surface of the locking body 7 is elastically displaceable surrounded by the very screw portion 52 of FIG. 3 and a U-shaped groove. A plurality of fitting pieces 53 are provided, and a nut body 8 having a pressing portion 81 that engages with the locking body 7 and elastically displaces the locking body 7 is screwed to the screw portion 52. The fitting piece 53 is detachably fitted into a fitting hole 11 provided in the free end portion of the outer cylinder 1 to fix the adapter 5 to the outer cylinder 1.

The nut body 8 has an inner thread 82 screwed into the threaded portion 52 on the inner circumference on one end side, and contacts the pressure receiving surface 72 of the locking body 7 on the inner circumference on the other end. A tapered pressing portion 81 for elastically displacing the locking body 7 radially inward is provided. Further, when the nut body 8 is screwed into the threaded portion 52 to lock the locking body 7 in the detent recess 32, the free end of the fitting piece 53 and the outer cylinder 1 is locked. It has a length that hides the edges.

Further, as shown in FIG. 4, the grip 4 has a boss portion 42 having an annular recessed portion 41 to be fitted into one end portion of the inner cylinder 3 and a curved grip portion 43 integrally made of synthetic resin. The annular recess 41 of the boss 42 is inserted into one end of the inner cylinder 3 and is fixed by the set screw 9.

1, 2 and 5, reference numeral 10 denotes a stopper fixed to the inner surface of the end portion of the inner cylinder 3 that is inserted into the outer cylinder 1, and the stopper 10 has a U-shape. Two elastically displaceable guide pieces 10a surrounded by the cut groove are provided so as to be elastically displaceable, and these guide pieces 10a are brought into contact with the inner peripheral surface of the inner cylinder 3 to guide the inner cylinder 3. On the other hand, when the inner cylinder 3 is inserted into the outer cylinder 1 to the maximum extent, the stopper 10 abuts on the cut-and-raised piece 12 on the manual tool mounting side of the outer cylinder 1 to cause the grip 4 to move. The contact with the nut body 8 is prevented.

The present invention is configured as described above, and normally, the grip 4 and the outer cylinder 1 or the inner cylinder 3 are gripped to perform a predetermined work. In this case, the engaging projection 6 of the adapter 5 fixed to the outer cylinder 1 engages with the rotation stopping recess 31 of the inner cylinder 3, and the engaging portion 71 of the locking body 7 further moves into the detent recess 32 of the inner cylinder 3. Since they are engaged with each other, the relative rotation and relative movement of the outer cylinder 1 and the inner cylinder 3 can be prevented.

When adjusting the length of the handle, the nut body 8 screwed into the adapter 5 is operated to be loosened so that the nut body 8 is separated from the locking body 7 in the axial direction. The loosening of the nut body 8 releases the pressing force of the locking body 7, and the locking body 7 elastically returns outward in the radial direction, so that the engagement portion 71 is engaged with the detent recess 32. Come off. Then, by moving the outer cylinder 1 and the inner cylinder 3 relative to each other in this state, the length of the handle is set to an arbitrary length, that is, shorter or longer than the standard length, or to the standard length. It can be done. Therefore, it is possible to improve the usability when working in a small space, in a narrow space where the length of the handle is preferably shorter than the standard length, such as when working in a soil pipe embedding groove or in an excavation hole, and it is possible to use a hand tool in It can be made bulky when it is loaded on a cargo bed or the like and transported to the work site, or when a large amount is transported by a manufacturer or a store. Further, it is possible to improve the usability when working in a place where it is preferable that the length of the handle is longer than the standard length, such as when removing snow from the roof or cleaning gutters, or when putting a manual tool in the steel furnace. Moreover, it is possible to improve the usability when working in a place where the standard length is preferable, such as when moving an item near the feet of the worker.

In addition, a detent recess 32 and a detent recess 31 are provided on the outer peripheral surface of the inner cylinder 3, and the adapter 5 is fixed to the outer cylinder 1 so that the detent recess 31 is attached to the adapter 5. Since the engagement projection 6 engaging with the locking stopper 7 and the locking body 7 that engages with the detent recess 32 are provided, the adjustment state of the length can be reliably maintained. The nut 7 is elastically displaced in the radial direction by the nut body 8 to press the engaging portion 71 against the detent recess 32 so as to connect the outer cylinder 1 and the inner cylinder 3 to each other. It is possible to prevent backlash between the cylinder 3 and the cylinder 3, wear of the locking body 7 can be reduced, and the length adjustment state can be favorably maintained for a long period of time.

In the embodiment described above, the hand tool 2 is attached to the outer cylinder 1 and the grip 4 is attached to the inner cylinder 3, but it may be installed in the opposite manner. Further, the grip 4 may be formed separately from the inner cylinder 3 or the outer cylinder 1, or the end of the outer cylinder 1 or the inner cylinder 3 may be extended outward, and the extension may be formed into a rod-shaped grip. ..

Further, in the above description, the adapter 5 is attached to the outer cylinder 1 and the engaging projection 6 and the locking body 7 are integrally formed on the adapter 5, but in addition, the adapter 5 may be eliminated. The engaging projection 6 may be formed by projecting a part of the outer cylinder 1 in the circumferential direction inward in the radial direction, or at the end of the outer cylinder 1 from the edge thereof in the axial direction. It is also possible to provide a split groove that extends in the direction of the split groove, and use the engaging piece 71 as the piece between the split grooves to form the locking body 7 that is elastically displaceable in the radial direction. However, by providing the adapter 5, the engaging projection 6 and the locking body 7 can be easily formed, and even when the engaging projection 6 and the locking body 7 are damaged, the adapter 5 is not attached to the outer cylinder 1. It has the advantage that it can be easily repaired by removing it from. Further, the engaging projection 6 may be a projection or a semicircular projection or a plurality of projections.

[0022]

[Effect of the device]

 As described above, according to the present invention, the inner cylinder 3 can be expanded and contracted with respect to the outer cylinder 1 to adjust the length of the handle as desired, while the inner cylinder 3 is provided with a detent recess 31 and a detent recess 32. Therefore, even when the detent recess 31 and the detent recess 32 are exposed to the outside of the outer cylinder A when the length of the handle is adjusted to be long, the detent recess 31 and the detent recess 32 can be used to It is possible to prevent mud or rainwater from entering the cylinder 3, and moreover, since the inner cylinder 3 is only provided with a recess and no locking hole is provided, the rigidity of the inner cylinder 3 is reduced. It can be prevented. In addition, the locking body 7 provided on the outer cylinder 1 is elastically displaceable in the radial direction of the outer cylinder 1, and the locking body 7 is pressed against the detent recess 32 by the nut body 8 to have the above-mentioned length. Since the adjusted state is maintained, it is possible to prevent looseness between the locking body 7 and the inner cylinder 3, wear of the locking body 7 can be reduced, and the length adjusted state can be maintained for a long time. And can be maintained satisfactorily.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional plan view of only a main part of a handle according to the present invention.

FIG. 2 is an enlarged vertical sectional front view of only a main part of the drawing.

FIG. 3 is a front view of only the adapter.

FIG. 4 is a vertical sectional view of a grip portion only.

FIG. 5 is a vertical sectional view of only a manual tool mounting portion of a handle.

FIG. 6 is a front view showing a usage state of a handle.

FIG. 7 is a cross-sectional view showing a handle previously proposed by the applicant of the present invention.

[Explanation of symbols]

 1 Outer Cylinder 2 Manual Tool 3 Inner Cylinder 31 Locking Recessed Concave 32 Detent Recessed Concave 4 Grip 6 Engagement Protrusion 7 Engagement Body 71 Engagement Part 8 Nut Body 81 Pressing Part

Claims (1)

[Scope of utility model registration request] 1. An outer cylinder 1 to which one of a hand tool 2 and a grip 4 is mounted, and an inner cylinder 3 which is extensible and supported in the outer cylinder 1 and to which the other of the manual tool 2 and the grip 4 is mounted. In the outer peripheral surface of the inner cylinder 3, a detent recess 31 extending in the length direction of the inner cylinder 3 and a plurality of detent recesses 32 recessed at predetermined intervals in the length direction of the inner cylinder 3. On the other hand, the outer cylinder 1 is provided with an engaging projection 6 that engages with the rotation stopping recess 31
A plurality of locking bodies 7 each having an engaging portion 71 that engages with the detent recess 32 and elastically displaceable in the radial direction with respect to the outer cylinder 1 are provided. A pressing portion 81 that engages with the locking body 7 and elastically displaces the locking body 7.
A handle for a manual tool, characterized in that a nut body 8 having a thread is screwed on.