JPS631721Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a vibrator that is inserted into a pool of concrete or mortar poured into a formwork, etc. to promote the flow, defoaming, leveling, etc. of concrete, etc., especially a hand-type rod-shaped vibrator. Regarding seismic grips.

FIG. 1 shows an example of a general rod-shaped vibrator, in which 1 is a drive source such as an electric motor or a small gasoline engine, 2 is a flexible shaft, and 3 is a main body of the rod-shaped vibrator.

The flexible shaft 2 consists of a flexible, thick and strong outer tube made of rubber or synthetic resin, and a helical deflection shaft inserted into the outer tube as a rotating shaft, and the flexible shaft end on the base side is It is connected to the rotating shaft of the drive source 1, and the end of the outer tube is connected and held to an immovable receiving member on the drive source 1 side.

The vibrator body 3 consists of a rod-shaped metal outer cylinder with a closed tip and an oscillating body inserted into the outer cylinder. When the oscillator is driven to rotate, 8000
It has a structure that generates vibrations of ~12000V, P, and M. The rear end of the oscillator in the vibrator main body 3 is connected to the tip of a flexible shaft, which is a rotating shaft on the distal end side of the flexible shaft 2, and the outer cylinder of the vibrator main body is connected to the outer pipe of the flexible shaft.

When the drive source 1 is driven, the rotation of the flexible shaft 2 causes the oscillator in the vibrator body 3 to rotate, causing the outer cylinder of the vibrator body 3 to vibrate. Therefore, a suitable part of the flexible shaft 2 near the vibrator main body 3 is grasped by hand, the vibrator main body 3 is lifted, and the vibrator main body 3 is plunged into a pool of concrete or mortar to perform the work.

In addition, there are vibrators such as compressed air drive type, electromagnetic vibrator type, and high frequency type.

During actual work, in order to prevent harmful effects (occupational diseases such as white wax disease) due to the transmission of vibrations to workers' hands, we are encouraging the use of anti-vibration air gloves, short shifts of workers, and intermittent work. It's on.

However, since the use of anti-seismic air gloves is inconvenient and reduces work efficiency, people tend to neglect or forget to use them. Also, since vibration work on concrete and the like requires special skill and skill, experienced workers will be successful if they are in charge of the work continuously.

The present invention was proposed in view of the above situation, and aims to significantly suppress the propagation of vibration to the hands of the worker without using vibration-proof air gloves, and to perform vibration work by handling the vibrator lightly. To provide an earthquake-proof grip that can be used by being attached to a rod-shaped vibrator.

That is, as shown in the embodiments of FIGS. 2 and 3, the present invention has a handle main body 4 in which the grip portion is covered with a relatively thick seismic cushion material layer 5 made of synthetic resin foam, rubber sponge, felt, etc. , an earthquake-proof coil spring 6 with a relatively strong stiffness and a relatively small elastic modulus, which is connected at one end with an earthquake-proof cushion seat 10 sandwiched between the handle body, and an earthquake-proof cushion seat 12 on the other end of the earthquake-proof coil spring. It consists of a coupling fitting 7 that is sandwiched and coupled to the rod-shaped vibrator side via an earthquake-proof cushioning material layer 8, and the handle main body 4 and the earthquake-proofing coil spring 6, or the earthquake-proofing coil spring 6 and the coupling fitting 7 is a gist of an earthquake-proof grip A of rod-shaped vibrators that are connected to each other so as to be freely rotatable.

The handle main body 4 of the embodiment is made of aluminum die-casting or iron casting, and the grip part is molded with single-cell urethane foam to a thickness that does not impair the grip, and the outer surface is coated with rubber to provide a vibration-proof cushioning material layer. 5 is formed.

The earthquake-proof coil spring 6 has an outer diameter of approximately 25 mm and a length of approximately 50 mm.
Relatively strong spring steel wire with a wire diameter of 3.2 mm.
It has a relatively small modulus of elasticity, and washers 9, 9 are attached to both ends thereof by inserting (Fig. 4) or by welding (Fig. 5). Then, the handle body 4 and the washer 9 on one end side of the seismic isolation coil spring 6
are connected to a high tension bolt 11 with a nut, with a relatively thick seismic rubber seat 10 sandwiched between them.

The vibrator coupling fitting 7 is made by bending a plate spring band into a substantially circular shape, bending both free ends outward as lugs 71, 71, passing a tightening bolt 72 through both lugs 71, 71, and attaching a nut.
The inner peripheral surface of the metal fitting is lined with a relatively thick seismic cushioning material layer 8 made of rubber, synthetic resin foam, rubber sponge, felt, etc., and the washer at the opposite end of the seismic isolation coil spring 6 from the handle body 4. 9 and metal fittings 7
are connected to a high tension bolt 13 with a nut, with a relatively thick seismic rubber seat 12 sandwiched between them.

The inner diameter of the metal fitting 7 lined with the seismic cushion material layer 8 is the same as that of the flexible shaft 2 of the vibrator in the free state with the tightening bolt 72 sufficiently loosened.
larger than the outer diameter of

In addition, the handle body 4 has a metal fitting 7 centered around the bolt 11 or around the bolt 13, including the anti-seismic coil spring 6.
It is free to rotate against.

To attach the grip A to the vibrator, remove the tightening bolt 72 from the lugs 71 and 71 of the metal fitting 7, pull out the lugs 71 and 71 against the elastic force, and insert the flexible shaft from between the lugs 71 and 71. 2 into the metal fitting 7 and externally fitting the metal fitting 7 onto the flexible shaft 2, and by inserting and tightening the bolts 72 through the lugs 71, 71, the outer peripheral surface of the flexible shaft 2 is lined with the seismic cushion material layer 8. The metal fittings 7 are used to sufficiently tighten the metal fittings 7 through the metal fittings 7. With this installation procedure, 2
The grips A and A are attached and fixed at two required locations on the flexible shaft 2 near the vibrator body 3 as shown in the first figure.

Then, the vibrator main body 3 is lifted up by grasping the two grips A and A at the front and back with the left and right hands to perform the vibration operation.

Note that the form of the vibrator coupling fitting 7 is not limited to the tightening band form of the above embodiment, but may also be in the form of an opening/closing gripper with a strong pinching force. Also, the seismic cushion material layer 8 inside the metal fitting 7
may not be lined in advance and may be interposed between the metal fitting 7 and the shaft 2 when the grip A is attached to the flexible shaft 2.

Therefore, by using the grip A of the present invention, (1) Vibration transmitted from the vibrator body 3 side to the worker's hand can be prevented by the seismic cushion material layer 8 interposed between the flexible shaft 2 and the metal fitting 7, and the seismic insulation rubber layer. Vibration is effectively absorbed and damped in order by the seat 12, the earthquake-proof coil spring 6, the earthquake-proof rubber seat 10, and the earthquake-proof cushion material layer 5 of the grip. As a result, vibration propagation to the hand that is clenching the grip can be significantly suppressed even without wearing vibration-proof air gloves.

(2) Therefore, grip A with work gloves or bare hands.
The vibrator can be handled by firmly squeezing the grip of the handle body 4 and the metal fitting 7.
The seismic isolation coil spring 6 interposed between the two is made of a material with a relatively strong stiffness and a relatively small elastic modulus, so there is no instability due to excessive bending and stretching of the spring 6.
The work efficiency is much better than handling the vibrator by wearing anti-seismic air gloves and grasping the fairly thick flexible shaft 2.

(3) The handle body 4 can freely rotate relative to the metal fitting 7 by connecting it to the vibration-proof coil spring 6, or the vibration-proof coil spring 6 and the coupling metal fitting 7, so that the handle body 4 can rotate freely relative to the metal fitting 7, so when handling it as a vibrator. When the vibrator is oriented in various directions, the handle body 4 naturally moves in a convenient direction with respect to the vibrator, which also improves the handling and workability of the vibrator.

(4) It can be used by attaching it to an existing rod-shaped vibrator without any problems.

The intended purpose is well achieved, and the grip is effective and suitable as an anti-seismic grip for rod-shaped vibrators.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an example of a rod-shaped vibrator, Fig. 2 is a partially cutaway front view of an embodiment of the seismic grip of the present invention, Fig. 3 is a vertical side view thereof, and Fig. 4 is a slope view of the washer portion. 5 are sectional views showing other embodiments of the washer. 1 is a drive source such as a motor, 2 is a flexible shaft, 3 is a vibrator body, A is an earthquake-proof grip, and 10 and 12 are earthquake-proof rubber seats.

Claims (1)

[Scope of Claim for Utility Model Registration] A handle body 4 whose grip portion is covered with an earthquake-proof cushion material layer 5, and a grip body with a relatively strong elastic modulus that is connected at one end with an earthquake-proof cushion seat 10 sandwiched between the handle body. A relatively small earthquake-proof coil spring 6, and a coupling fitting 7 that is connected to the rod-shaped vibrator side via an earthquake-proof cushion material layer 8, which is connected to the other end of the earthquake-proof coil spring 6 with an earthquake-proof cushion seat 12 sandwiched therebetween; An earthquake-proof grip for a rod-shaped vibrator, in which the handle body 4 and the earthquake-proof coil spring 6, or the vibration-proof coil spring 6 and the coupling fitting 7 are connected to each other so as to be freely rotatable.