JPH08137Y2 - wrench - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrench capable of effectively tightening a screw at a place where the turning operation of a torque wrench is affected by an obstacle and the turning operation is restricted. is there.

[0002]

2. Description of the Related Art FIG. 1 shows a conventional preset type torque wrench. This preset type torque wrench 1 has a handle portion 2 in which a torque regulating means such as a toggle is installed, and the handle portion 2. Head part 3 supported by
And a head cover 4 fitted in the head portion 3 and a square hole 5 provided in the head cover 4.

[0003]

When the torque wrench 1 is used to tighten a screw 8 such as a bolt of a flange joint 7 arranged in a U-shaped groove 6 as shown in FIG. 2, for example, Since the width of the U-shaped groove 6 is narrow, the tip of the handle portion 2 of the torque wrench 1 hits the inner wall of the groove 6 and the turning operation of the torque wrench cannot be performed smoothly. There is a problem in that the screwing work is very inefficient and the screwing work is inefficient.

The angle θ provided on the head cover 4 is reversed by reversing the front and back of the torque wrench 1.
Causes the direction of the torque wrench handle 2 to be displaced,
As a result, the operating range for tightening screws such as bolts can be expanded.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and has a normal torque wrench and a handle portion having a length shorter than the handle length of the torque wrench. A combination with a ratchet wrench having a square hole into which the square drive of the torque wrench is fitted, and at the beginning of tightening the screw, the ratchet wrench with a short handle is used to tighten a narrow screw. Even if the work area is attached, the screw tightening work should be facilitated, and at the end of tightening the screw, a torque wrench should be connected to the ratchet wrench, and the ratchet wrench should be used to rotate the ratchet wrench. (EN) Provided is a wrench capable of tightening a screw to a predetermined tightening torque value.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

In FIGS. 3 and 4, 11 is a ratchet wrench, 12 is a handle portion of the ratchet wrench which is formed relatively short, and 13 is a head portion formed at the tip of the handle portion 12. A penetrating ratchet 14 is rotatably supported on the head portion 13. A ratchet blade 15 is formed on the outer peripheral surface of the through-type ratchet 14, and a head saw 17 that is locked by the elastic force of a spring 16 is meshed with the ratchet blade 15. Is designed to be rotated in only one direction.

Reference numeral 18 denotes a torque wrench fitting square hole provided at the boundary between the handle 12 and the head portion 13. A pair of wall surfaces 19 of the square hole 18 are arranged with respect to a central axis 20 of the handle 12. The angle is set to 45 degrees.

The above is the structure of the ratchet wrench,
Next, the structure of the preset type torque wrench will be described with reference to FIGS. 5 and 6, but the structure of the preset type torque wrench 21 is the well-known preset type torque wrench 2
The structure of the torque wrench is the same as the structure of No. 1, but the size of the square drive 22 provided at the tip of the preset type torque wrench 21 is fitted in the square hole 18 provided in the ratchet wrench 11. The size is set so that it can be locked. Since the internal structure of the torque wrench 21 is a well-known structure, its structural description will be omitted.

The structure of this embodiment has been described above. Next, the operation thereof will be described. As shown in FIG. 7, the flange 24 arranged in the narrow U-shaped groove 23 is screwed, for example, by bolts. When tightening with a screw 25 such as a nut, in a torque wrench with a long handle, the handle hits the groove wall of the U-shaped groove 23, and the tightening work is difficult. Therefore, at this time, first use the ratchet wrench 11 with a short handle. The tightening work of the screw 25 is started. Then, when the screw 25 is tightened in the midfield and it becomes difficult to tighten the ratchet wrench 11 having a short handle to a predetermined tightening torque value, the screw 25 is held in the square hole 18 of the ratchet wrench 11 as shown in FIG. As shown in FIGS. 9 and 10, the square drive 22 of the torque wrench 21 is fitted and connected, and the screw tightening torque by the torque wrench 21 is transmitted to the screw 25 via the ratchet wrench 11.

Accordingly, if the screw tightening using the torque wrench 21 and the ratchet wrench 11 together is carried out until the toggle of the torque wrench 21 operates (several rotation operations), the screw tightening is carried out with a desired screw tightening torque. Is completed.

The wall surface of the square hole 18 formed in the ratchet wrench is 45 degrees with respect to the central axis 20 of the handle 12 (symmetrical).
As a result of the above-mentioned provision, an angle difference of 45 degrees is generated between the central axis of the torque wrench 21 and the central axis of the ratchet wrench in both the forward and reverse directions , as shown in FIG. For the central axis of the ratchet wrench handle
The torque wrench handle has a symmetrical inclination angle.
The actual effective length of the torque wrench can be made constant.
Wear. Therefore, when the handle tail end of the torque wrench 21 comes into contact with the wall surface or the like at the screw tightening site and the turning operation of the torque wrench is difficult, the torque wrench is not attached to the ratchet wrench.
Even if the fitting position of is repeatedly changed, the torque
Can be tightened with the set torque value
It

Although the torque wrench 21 is connected to the ratchet wrench 11 in the above embodiment, the dial type torque wrench 26 is fitted and connected to the ratchet wrench 11 as shown in FIGS. 11 to 13, for example. You can also perform a tightening inspection.

As described above, in the present embodiment, when the tightening torque of the screw to be tightened is low, the ratchet wrench with a short handle is used for easy and quick screw tightening work, and when the tightening torque is increased, By connecting a preset-type torque wrench with a long handle or dial-type torque wrench to the ratchet wrench and tightening the screws (increase tightening inspection) with a specified torque value, tightening with a torque wrench with a long handle is performed. The number of movements has been largely eliminated,
This also significantly improves the screw tightening work efficiency with a predetermined tightening torque value as in the above embodiment .

[0015]

[Effect of the Invention] As described above, the present invention provides a torque wrench,
Has a handle portion which is a handle length shorter than of the torque wrench, and the angular drive of the torque wrench該柄part, its
Since a torque wrench is a combination of a ratchet wrench in which the actual effective length of the torque wrench is provided with a square hole fitted to be constant, according to this, the ratchet wrench
The wall surface of the square hole provided at the center of the handle (symmetrical)
The central axis of the torque wrench is
Between the center of the ratchet wrench and the center of the ratchet wrench
Symmetric angle difference between the two directions, which causes ratchet
Angle of inclination of handle of torque wrench with respect to center axis of handle of wrench
Are symmetrical, which makes the actual effective length of the torque wrench
It can be kept constant. Therefore, the torque
When the tail end of the punch touches the wall surface of the screw tightening site, torque
Ratchet wrench when turning the wrench is difficult
Repeatedly changing the mating position of the torque wrench
Even if it is performed, tighten the screw with the torque value set by the torque wrench.
You can Also when tightening low tightening torque of the screw to performs a screwing operation easily and Naru quickly by a short ratchet wrench of handle, and when the torque with its fastening is increased, connecting the long torque wrench of the handle to the ratchet wrench Then by torque wrench
By the setting torque performs screwing (additional tightening inspection), the effect is obtained that the screw tightening work efficiency due to the torque value tightening Jo Tokoro is significantly improved.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing a conventional torque wrench.

FIG. 2 is an explanatory view of a tightening operation using a conventional torque wrench.

FIG. 3 is a structural explanatory view of a ratchet wrench according to an embodiment of the present invention.

4 is an explanatory view of a sectional structure of FIG.

FIG. 5 is a structural explanatory view of a torque wrench according to an embodiment of the present invention.

6 is a partially cutaway view showing the internal structure of FIG.

FIG. 7 is an explanatory view of the tightening action by the ratchet wrench according to the embodiment of the present invention.

FIG. 8 is an explanatory view of the tightening action by coupling the ratchet wrench and the torque wrench of the embodiment of the present invention.

FIG. 9 is an explanatory plan view showing a combined state of the ratchet wrench and the torque wrench of the embodiment of the present invention.

FIG. 10 is an explanatory side view showing a coupled state of the ratchet wrench and the torque wrench according to the embodiment of the present invention.

FIG. 11 is a plan view of a dial wrench according to another embodiment of the present invention.

FIG. 12 is a side view of a dial wrench according to another embodiment of the present invention.

FIG. 13 is an explanatory view of the tightening action of another embodiment of the present invention.

[Explanation of symbols]

11 ... Ratchet wrench 12 ... Handle part 13 ... Head part 14 ... Penetration type ratchet 15 ... Ratchet blade 16 ... Spring 17 ... Head socket 18 ... Square hole 19 ... Wall surface 20 ... Center axis 21 ... Preset torque wrench 22 ... Square drive 23 … U-shaped groove 24… Flange 25… Screw

Claims (1)

[Scope of utility model registration request] 1. A torque wrench comprising a handle portion which is shorter than the length stem length of the torque wrench, and the angular drive of the torque wrench該柄part, the actual chromatic of the torque wrench
A wrench characterized in that it is a combination with a ratchet wrench provided with a square hole that is fitted so as to have a constant effect length .