JPH08141927A - Transmitter - Google Patents

Abstract

PURPOSE: To provide a transmitter which is mounted on a screw fastening tool and wirelessly transfers screw fastening information on its screw fastening tool. CONSTITUTION: A case frame 21 of a transmitter 20 is formed of metal, and an antenna coil 25 is wound round and held by an insulating cover plate 26 to be laid on an upper side opening part of its case frame 21. Therefore, impact resistance of the transmitter 20 is enhanced, Since a transmitting antenna is not projected outside of the transmitter 20, the antenna does not become a hindrance, and screw fastening workability is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitter for wirelessly managing a screw fastening condition during screw fastening work using a torque wrench.

[0002]

2. Description of the Related Art When a screw tightening machine such as a torque wrench is used to fasten a large number of screws at a screw tightening work site, it is necessary to manage the fastening condition of the screws to be screwed.

Therefore, conventionally, as a means for managing the screw tightening situation, data such as the tightening torque value of the screw can be recorded, displayed and further stored (stored) in the screw tightening machine. There is known a system that includes a processing circuit and transmits the data accumulated and stored in the data processing circuit to a personal computer installed in, for example, a management room to manage the screw fastening state.

[0004]

The means for transmitting the data accumulated and stored in the screw tightening machine to a personal computer or the like installed at a remote place includes a wire type and a wireless type. Wired data transfer means,
Since it is necessary to connect a cable between the screw tightener and the PC, it takes time and effort to connect the cable, and because the cable is routed, this cable becomes an obstacle during tightening work. Screwing work is not smooth. Furthermore, since the length of the cable is limited and the distance between the screw tightener and the personal computer is limited, the personal computer must be brought to the work site.

In addition, in the tightening data transfer means by radio,
For example, as shown in FIG. 1, a torque wrench 1 is equipped with a torque wrench 1 and an antenna 3 for transmission is transmitted from a transmitter 2.
Since the antenna 3 has to be pulled out, there is a problem that the antenna 3 becomes an obstacle during the screw tightening work using the torque wrench 1 and the work efficiency is remarkably reduced.

Further, as shown in FIG. 1, the transmitter 2 mounted on the outer side of the torque wrench 1 collided with another object during the screw tightening work and was damaged. That is, at the time of tightening the screw, the torque wrench 1 is rotated about the socket mounting shaft of the head 4, but this rotation angle (rotation region) is not usually predicted, and particularly, the screw During the loosening work, the torque wrench 1 is largely rotated due to the abrupt transition of the friction coefficient between the screw and the fastened part from static friction to dynamic friction. There is also a problem that the case of the transmitter 2 may be damaged because it may collide with the components existing in the.

[0007]

SUMMARY OF THE INVENTION The present invention has been made by paying attention to the above-mentioned conventional problems, and a case of a transmitter installed in a screw tightening machine such as a torque wrench is made of metal,
It is to provide an oscillator with increased rigidity of the case itself.

Further, a loop antenna that ensures electrical insulation from the metal case is provided on the upper surface of the case frame of the transmitter, which eliminates the need for the conventional antenna that is spent outside the transmitter. An object of the present invention is to provide a transmitter that can eliminate the above problems and improve the workability of tightening screws.

[0009]

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

First, referring to FIG. 2, the structure of a torque wrench equipped with a transmitter according to an embodiment of the present invention will be briefly described.

Most of the structures of this torque wrench are well known, and 11 is a cylindrical body which is integral with the handle portion 12, and inside the cylindrical body 11, a shaft 13 is pivotally supported. The head 14 is provided, and the head 14
A thruster 16 is connected to the tail end of the through a toggle 15. Reference numeral 17 is a sensor attached to the head 14 to detect the fastening force of the screw, and 18 is a detection pin attached to the head 14. Reference numeral 19 represents a spring for adjusting the set torque.

Next, the structure of the oscillator will be described with reference to FIGS.

Reference numeral 20 denotes a transmitter, and the transmitter 20
Is attached to the outside of the tubular body 11 of the torque wrench. This transmitter 20 has a circuit board 24 having a microswitch 22, an electronic circuit 23, etc. mounted inside a case frame 21 whose periphery is made of metal except the upper and lower surfaces, and further has an upper surface opening portion of the case frame 21. Insulating plate has a wire ring 25
The transmitter 20 is configured by attaching the cover plate 26 that holds the coil.

The detection pin 18 passes through an arc-shaped elongated hole 27 formed in the cylinder 11 and is expended to the outside of the cylinder. The tip of the detection pin 18 operates the micro switch 22. Is configured to be able to.

The structure of this embodiment has been described above. Next, its operation will be described. When the screw tightening is performed using the torque wrench of this embodiment as shown in FIG.
4 is engaged with a screw to be tightened (not shown), and the handle 12 is rotated to advance the screw tightening. When a specified fastening force is applied to the tightened screw, a known snap operation is performed, and the detection pin 18 is moved by the operation at this time, whereby the micro switch operates and a fastening completion signal is output. At the same time, the operation of the sensor 17 detects the fastening force of the tightening screw. The signals from the sensor 17 and the microswitch are sent to a device for fastening management (for example, a personal computer (not shown)) via the loop antenna 25 by a transmission unit using radio waves. Further, either one of the signal emitted by the sensor 17 and the signal emitted by the detection pin 18 or the micro switch 22 may be used.

As described above, the transmitter 20 according to the present embodiment.
Since the case frame 21 is made of metal, the rigidity of the case frame 21 is enhanced, and thus the transmitter 20 collides with the components existing around the screw tightening work site. Even if there is, the case is prevented from being damaged and the transmission circuit is effectively protected.

A non-metal (non-magnetic, non-conductive) cover plate 26 which covers the case frame 21 holds the coil.
Since this wire loop is used as an antenna, it is possible to solve the problem that the antenna that is pulled out to the outside of the torque wrench deteriorates the screw tightening workability as in the related art.

[0018]

As described above, the present invention is a transmitter which is attached to a screw fastening tool and wirelessly transfers screw tightening information by the screw fastening tool, and at least four side walls of a case frame of the transmitter. Is a metal, and the metal side wall is fixed to a screw fastening tool, and a non-metal lid plate having an antenna coil wound around it is attached to the upper opening of the case frame. Therefore, according to this,
Even if the transmitter attached to the screw tightening tool collides with the components around the screw tightening work site, the case is prevented from being damaged and the transmitter circuit is effectively protected. Done.

A lid plate 26 is placed on the case frame 21.
Since the wire loop is held by the antenna and this wire loop is used as the antenna, it is possible to solve the conventional problem that the antenna pulled out to the outside of the torque wrench impairs the screw tightening workability.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a conventional torque wrench with a transmitter.

FIG. 2 is an explanatory view showing an internal structure of a torque wrench used in the embodiment of the present invention.

3 is an external view of FIG.

FIG. 4 is a structural explanatory view of a transmitter according to an embodiment of the present invention.

[Explanation of symbols]

11 ... Cylindrical body 12 ... Handle part 13 ... Spindle 14 ... Head 15 ... Toggle 16 ... Thruster 17 ... Sensor 18 ... Detecting pin 19 ... Spring 20 ... Oscillator 21 ... Case frame 22 ... Micro switch 23 ... Electronic circuit 24 ... Circuit Substrate 25 ... Wheel 26 ... Lid 27 ... Slot

Claims (1)

[Claims] 1. A transmitting device which is attached to a screw fastening tool and wirelessly transfers screw fastening information by the screw fastening tool, wherein at least four side walls of a case frame of the transmitting device and the metal side wall are screwed. The surface to be fixed to the fastening tool is made of metal, and the opening of the top of the case frame is made of non-metal (non-conductive, non-magnetic) in which a coil that can also serve as an antenna or a shield wire is wound and held A transmitter characterized by being covered with a cover plate.