JPH0623678A - Hand-held power tool - Google Patents

Abstract

PURPOSE: To change a handle suitable for operators by providing a power transmission device separately from a pistol type handle. CONSTITUTION: This hand held power tool comprises a housing 10, a motor 14, a pistol type handle 12 vertically extended from the housing 10 to the application direction of the tool, and a power communication means 16, 20, 23 including a power supply controlling means 20 for controlling the motive power supply from a power supply conduit to the motor 14. The power communication means 16, 20, 23 inclusive of the power supply controlling means 20 is separated from the handle 12. The pistol type handle 12 comprises a trigger 22 for operating the power supply controlling means 20 and a detachable grip member 28 which is selected as an optimum one from a set of many interchangeable grip elements of different sizes and/or shapes to fit individual operators.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand-held power tool, particularly a housing, a motor, a pistol-type handle extending from the housing substantially perpendicular to the direction of use of the tool, and a drive force supply from a power supply conduit to the motor. The present invention relates to a hand-held power tool having a power transmission device including a power supply control device for controlling.

[0002]

2. Description of the Prior Art In a power tool of the type described above, it is necessary for an operator who uses the tool to safely and satisfactorily grasp a handle because a person, for example, a man and a woman, have different hand sizes. This means that large-sized tool handles are suitable for people with large hands and it is difficult for small-handed people to grip such large-sized tool handles safely and satisfactorily. On the contrary, a thin handle fits a person with a relatively small hand, but it is recognized that it is difficult for a person with a relatively large hand to grip such a thin handle.

[0003]

It is therefore an object of the invention to provide a power tool of the above type with a handle suitable for all operators from an ergonomic point of view. The main object of the present invention is to solve the above problems.

[0004]

The above object is to provide a power transmission device separately from a pistol type handle, a trigger for operating the power supply control device by the pistol type handle, and a grip detachably attached to the housing. And a handheld power tool.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. The power tool illustrated in the drawings is a pneumatic wrench, and includes a housing 10, a compressed air supply hose connecting portion 11, a pistol type handle 12, and an output shaft 13.
And have. The output shaft 13 is connected to a pneumatic vane motor 14 via a mechanical power transmission device (not shown).

The compressed air supply hose connecting portion 11 is an air inlet pipe.
Located at the upper end of 16, this air inlet tube 16 is
It is screwed into the socket part 17 at the rear end part 15 of the 10. This socket portion 17 is substantially opposite to the pistol handle 12, which means that when the tool is used with the pistol handle 12 facing downwards as in the normal case, the air inlet tube 16 is facing upwards. It means that.

A tilting type throttle valve 20 is mounted on the rear end portion 15 of the housing 10, and the throttle valve 20 is a valve seat.
Cooperates with 21 in a sealed manner. The throttle valve 20 is a pistol type handle
It is operated by an ordinary pistol type trigger 22 provided on 12. The trigger 22 comprises an elongated rod 19 which reaches the stem of the throttle valve 20.

An air supply passage provided downstream of the throttle valve 20
Reference numeral 23 supplies compressed air from the throttle valve 20 to the pneumatic vane motor 14. Exhaust air from the pneumatic vane motor 14 is discharged from the housing 10 through the multiple openings 24 to the outlet casing 25. The outlet casing 25 is provided on the top of the housing 10 so as to surround the air inlet pipe 16.
The outlet casing has a rotatable outlet sleeve 26 on its upper end.
The outlet sleeve 26 is provided with one or more openings 27 which direct the flow of exhaust air in the desired direction.

The outlet casing 25 and outlet sleeve 26 surround the air inlet tube 16 coaxially so that the hose that directs the exhaust air from the tool can be mounted coaxially to the compressed air supply hose. Such an air exhaust hose is directly connected to the outlet sleeve 26.

The pistol-type handle 12 is provided with a gripping member 28, which is formed with a socket part 29 having a rectangular cross section, which socket part 29 of the housing 10 has a corresponding cross-sectional shape. To fit. The grip member 28 is fixed to the housing 10 by inserting a screw 31 into a stepped hole 32 in the grip member 28 and engaging with a screw hole 33 in the rectangular protrusion 30. The easily removable gripping member 28 is one of a set of interchangeable gripping members of various sizes.

Two gripping members are shown in FIGS. 3 and 4, which together with the gripping member mounted on the tool in FIG. 1 form part of a set of interchangeable gripping members. Is made. The gripping member 28 'in FIG. 3 is narrower than the gripping member attached to the tool in FIG. 1 to allow a small person to safely and satisfactorily handle the tool. On the other hand, the grip member 28 '' shown in FIG. 4 is formed thick so as to fit a person with a large hand.

In a power tool according to the present invention, not only can a number of different sized gripping members be used as part of the set provided with the tool, but it can also be anatomically placed in the hands of the person using the tool. You will also be able to use a uniquely shaped gripping member. The grip member 28 preferably comprises a molded plastic body.

While the above embodiment of the invention uses threaded joints 31, 33 to attach the grip member 28 to the tool housing 10, the invention is not limited to such a special construction. Should be understood. Alternatively, a quick release snap mechanism can be used to facilitate replacement of the gripping members.

The present invention is also not limited to the structure of the tool housing projection 30 extending in the longitudinal direction of the handle 12. Within the scope of the inventive concept, a housing
It is also possible to provide dovetail coupling means on the gripping member 28 and the gripping member 28 so that the gripping member 28 can be mounted on the housing 10 by sliding it along the housing 10 into the correct position and hooking it in place by means of screw joints or snap means. .

Further, as an important point, although the pneumatic power tool has been described above, the present invention is not particularly limited to such a type of tool, but can be applied to an electric tool.

[Brief description of drawings]

FIG. 1 is a side view of a power tool according to the present invention.

2 is a longitudinal sectional view of a rear portion of the tool shown in FIG.

FIG. 3 is a view showing exchangeable grip members of different sizes.

FIG. 4 is a view showing exchangeable grip members of different sizes.

[Explanation of symbols]

 10: Housing 11: Compressed air supply hose connection 12: Pistol type handle 13: Output shaft 14: Pneumatic vane motor 15: Rear end part of housing 16: Air inlet pipe 17: Socket part 19: Elongated rod 20: Throttle valve 21: Valve seat 22: Pistol type trigger 23: Air supply passage 24: Opening 25: Outlet casing 26: Outlet sleeve 28: Grip member 29: Socket part 30: Protrusion 31: Screw 32: Stepped hole 33: Screw hole

Claims (5)

[Claims] 1. A housing (10), a motor (14), a pistol type handle (12) extending from the housing (10) substantially perpendicularly to a direction of use of a tool, and a power supply conduit to the motor (14). And a power transmission device (16, 20, 23) having a power supply control device (20) for controlling the driving force supply of the power transmission device (16, 20, 23).
20 and 23) are provided separately from the pistol type handle (12), and the pistol type handle (12) is provided on the housing (10) and the trigger (22) for operating the power supply control device (20). Removable grip member (28)
A hand-held power tool characterized by having and. 2. The gripping member (28) is one of a number of interchangeable gripping members (28, 28 ', 28'') of different sizes and / or shapes for different operators. Claim 1
Handheld power tool described in. 3. A projection (30) of non-circular cross-section, wherein the housing (10) is adapted to be received by a socket portion (29) of the gripping member (28) having a corresponding cross-section.
And the protrusion (30), the grip member (2
Fixing device (31, 3) for fixing 8) to the housing (10)
3) The hand-held power tool according to claim 1 or 2, further comprising: 4. A pistol type handle (12) having a projection (30).
The handheld power tool according to claim 3, which extends in the longitudinal direction of the. 5. A screw in which a fixing device (31, 33) extends longitudinally through a screw hole (33) in a protrusion (30) and a grip member (28) and engages with the screw hole (33). (31) The hand-held power tool according to claim 3 or 4.