JP3671660B2 - Body protection device for portable power tools - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a main body protection device for a portable power tool that protects the outer peripheral portion of the main body.
[0002]
[Prior art]
The structure for protecting the main body of the conventional portable power tool is a dedicated material for preventing falling off by attaching a soft material such as rubber directly to the outer wall surface of the main body with an adhesive or covering the main body with a soft material. It was fixed with screws.
[0003]
[Problems to be solved by the invention]
When a conventional protective member such as rubber is bonded to the main body, it is of course difficult to separate the two at the time of disposal after the end of the useful life of the main body. There arises a problem that it becomes difficult to separate and dispose of waste. In addition, when deterioration or breakage progresses with the progress of use, it cannot be replaced and loses its protective function, and it must endure the unsightly appearance. On the other hand, if the protective member is put on the main body and fixed with screws, etc., the above problems can be prevented if it is replaced as necessary. The problem of reversing the downsizing, which is a requirement of equipment, arises, and further, the problem of impairing the work operability due to the protrusion of a dedicated fixing screw or the like arises.
[0004]
An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, to maintain good workability while keeping the size of the main body as it is, and to facilitate separation and disposal at the time of disposal.
[0005]
[Means for Solving the Problems]
The purpose of the above is to reduce the size by forming a flexible guard that protects the main body so that it covers at least a part of the outer surface and is integrated into the main body, and the surface of the guard protrudes slightly from the outer wall of the main body. It is maintained as it is, and is fixed to the main body by using a fastening member for assembling the main body, and can be easily separated and removed as necessary.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. 1 to 3, which are applied to a screw tightening machine that is one of portable power tools.
Below the housing 11 that forms the outer frame of the main body 1, a well-known injection unit 2 is provided in a nail driver or the like, and a screw (not shown) is driven out from the injection unit 2 to perform a tightening operation. The housing 11 is formed with a handle 3 that is held by the tool user during the operation or movement of the main body so as to be substantially perpendicular to the main body 1. Housings 12 and 13 incorporating drive sources such as cylinders, pistons, and air motors (not shown) are connected to the upper portion of the housing 11 by screws 5 as fastening members, and are screwed and fixed into screw holes 51 to form the main body 1. The A concave mounting groove 6 into which a guard 4 made of a flexible member such as rubber is fitted is formed at the corner of the housing 12. The guard 4 is formed with a fitting portion 41 that fits into the mounting groove 6, and a through hole 42 through which the screw 5 is inserted is formed in the center portion thereof. Further, as shown in FIG. 3, the guard 4 is formed in a substantially L shape with its cross section surrounding the through hole 42. Further, overhanging tongues 43, 44, 45, 46 are projected and formed over the entire upper, lower, left, and right circumferences of the fitting portion 41 of the guard 4. The overhanging tongues 43 to 46 are fixedly adhered to the outer wall surface of the housing 12 at the same time that the guard 4 is attached to the housing 12 with the screws 5.
[0007]
The axial length L1 of the fitting portion 41 of the guard 4 is formed slightly longer than the length L2 of the mounting groove 6 by Δt. When the guard 4 is assembled, the axial length L1 is deformed by being reduced by Δt due to the pressing force of the assembling operation, and is fitted into the mounting groove 6 to be locked. Therefore, the assembly of the guard 4 does not require a support operation such as pressing the guard 4 in particular, and the screw 5 can be assembled.
[0008]
The operation of the main body protection device of the present invention configured as described above will be described. When using a screwing machine that is a portable power tool, the tool body 1 is often placed on the work surface or work table to stop the work operation temporarily during the work. At this time, the posture of the main body 1 often settles to a stable posture after the corners come into contact. Therefore, the corner portion of the main body 1 is the portion that is most susceptible to the impact force at the time of contact. Therefore, the guard 4 attached so as to cover at least the corners serves to protect the main body 1 by reducing the contact impact force. Further, since the guard 4 slightly protrudes from the surface of the main body 1, even if the main body 1 is dragged, it can be protected from an object that damages the surface with a slight gap.
[0009]
Also, depending on the work place, the surface is often subjected to vibration or impact, but since the guard 4 is formed of a flexible member such as rubber, the coefficient of friction with the contact surface is large and vibration is caused. It does not move due to a slight impact, and it has anti-slip and braking action. In particular, when the contact surface is an inclined surface such as on the roof, a more effective action and effect of preventing the main body 1 from slipping out can be maximized.
[0010]
Moreover, since the guard 4 is assembled | attached with the screw 5 which is a fastening member for main body assembly, a dedicated screw member is unnecessary and can be comprised without increasing a number of parts. Furthermore, since the guard 4 is integrally incorporated in the main body 1, it is possible to maintain downsizing and good operability as it is, and it is possible to prevent a minus surface that is likely to be generated by mounting on the outer frame surface.
Further, if the guard 4 is divided into the corners and corners of the main body 1, it is significant in assemblability and exhibits its effectiveness in terms of economy such as damage replacement.
[0011]
In the above embodiment, the main body 1 constituting the outer frame is divided and assembled into three parts of the housings 11, 12, and 13. However, as shown in FIGS. 4 to 6, the housing 12 is attached to the housing 11. It can be easily implemented even with a two-divided structure of the housings 11 and 13 and exhibits the same effect.
[0012]
【The invention's effect】
As described above, according to the present invention, the guard is integrally attached to the main body, and only the surface of the guard is slightly protruded and fixed from the main body, so that the miniaturization that is an essential requirement of the portable power tool is maintained as it is. The main body can be protected by using a fastening member for assembling the main body for mounting and dismounting, and the shape has been devised, so that the mounting is surely performed and the assemblability is also improved. Even when discarded after a lapse of years, it can be easily separated and decomposed, and an excellent effect of enabling separate disposal can be achieved.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a portable power tool employing a protection device of the present invention.
FIG. 2 is a cross-sectional view taken along the line AA in FIG.
3 is a cross-sectional view taken along the line BB in FIG.
FIG. 4 is a side view showing another embodiment of a portable power tool employing the protection device of the present invention.
5 is a cross-sectional view taken along the line AA in FIG. 4;
6 is a cross-sectional view taken along the line BB in FIG.
[Explanation of symbols]
1 is a main body, 2 is an operating part, 3 is a handle, 4 is a guard, 5 is a screw, 42 is a through hole, and 43 to 46 are tongues.

Claims (4)

In a portable power tool having a main body with a built-in drive source and a handle formed adjacent to the main body,
A mounting groove extending in the longitudinal direction and recessed inward in a part of the outer periphery of the main body, and a through-hole penetrating along the longitudinal direction is provided so as to protrude outwardly on one side in the longitudinal direction of the mounting groove. A first flange having a second flange having a through hole or a screw hole provided so as to protrude outwardly on the other side in the longitudinal direction of the mounting groove and penetrating along the longitudinal direction; and a flexible member; A guard that integrally includes a fitting portion that enters the mounting groove, a through hole that penetrates the fitting portion in the longitudinal direction, and an outer peripheral portion that protrudes outward from the outer peripheral surface of the first and second flanges; A screw that passes through the through hole, the through hole of the guard, and the through hole of the second flange, or a screw that passes through the through hole of the first flange and the through hole of the guard and is screwed into the second flange. It is characterized by being detachably attached to the main body. Body protective device of a portable power tool that.   2. The portable power tool according to claim 1, wherein the guard has a substantially L-shaped cross section centered on the through-hole and a tongue portion that is in close contact with the outer wall of the main body at the tip of the entire outer periphery. Body protection device. The length along the longitudinal direction of the guard, and slightly longer than the longitudinal length of the mounting groove of the body, according to claim 1, wherein which slightly deform the guard is characterized in that so as to attached to the main body Body protection device for portable power tools. Met portable power tool having a handle formed adjacent to the body and the body with a built-in drive source,
A mounting groove extending in the longitudinal direction and recessed inward in a part of the outer periphery of the main body, and a through-hole penetrating along the longitudinal direction is provided so as to protrude outwardly on one side in the longitudinal direction of the mounting groove. A first flange having a second flange having a through hole or a screw hole provided so as to protrude outwardly on the other side in the longitudinal direction of the mounting groove and penetrating along the longitudinal direction; and a flexible member; A guard that integrally includes a fitting portion that enters the mounting groove, a through hole that penetrates the fitting portion in the longitudinal direction, and an outer peripheral portion that protrudes outward from the outer peripheral surface of the first and second flanges; A screw that passes through the through hole, the through hole of the guard, and the through hole of the second flange, or a screw that passes through the through hole of the first flange and the through hole of the guard and is screwed into the second flange. and characterized in that it mounted detachably on the main body That mobile for power engineering equipment.

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