JPS6015658Y2 - Nut supply tightening device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic supply type nut tightening device that automatically supplies nuts to bolts fixed at arbitrary positions and tightens the nuts.

For tightening, feed a flat part such as a nut into the tool while keeping it in a plane perpendicular to the axial direction of the mating bolt, and maintain that position until the tool operates and the mating bolt is screwed into the bolt. It is extremely difficult to do so, and there have been few examples of this in the past.

- For example, before tightening a nut, it is supplied to the final supply position within the tool, i.e., coaxial with the mating bolt, and is first supplied to a preliminary position nearby, and then moved to the final position using a rotating supply plate, etc. Although it is conceivable that such a device could be used, there were problems in positional accuracy in nut supply and in maintaining the posture.

The present invention eliminates the above-mentioned difficulties and improves the structure of the nut receiving part in the tool, thereby making it possible to supply nuts all at once to a predetermined final position in the tool, and at the same time, to supply the nuts from the hopper to the tool. The present invention provides a nut feeding and tightening device which eliminates waste in the nut path leading to the nut, has a simple structure, and is reliable in operation.

An embodiment of the present invention will be described below with reference to the drawings.

This device consists of a nut feeding device main body 1, a nut tightening tool 2, and a nut feeding conduit 3 made of a flexible material that connects these tools.

The nut feeding device body 1 is formed with a hopper 4 for storing a large number of nuts.
It is rotatably mounted inside.

7 is a chute whose upper end is located inside the rotating drum 6;
The lower end is provided diagonally through the hopper wall, and the upper end is attached with a receiving plate 8 for receiving the nuts scooped up by the rake claws 5.

Reference numeral 9 is an escapement provided at the tip of the chute 7, which separates the nuts continuously fed from the chute 7 one by one and sends them into the conduit 3. Reference numeral 10 is a motor for driving the rotating drum 6.

As shown in FIG. 2, a shaft hole 11 with a rectangular cross section passes through the conduit 3 so that both end surfaces of the nut are in contact with each other, and both ends 12 of the shaft hole 11 are used to introduce a nut delivery pipe 13 and the nut into the tool 2, respectively. To install the nut introducing pipe 14, insert the shaft hole 1 at the end.
1, and are fitted and fixed with the orientation of 1 adjusted.

In the tool 2, 15 is a tool body sleeve, which is provided with a power cord 16 and a switch box 17.

Reference numeral 18 denotes a nose block on which the introduction pipe 14 is provided on the side, and is supported by one end of the tool body sleeve 15 so as to be slidable in the axial direction.

A handle lever 19 for operating the tool is provided at the other end of the tool body sleeve 15, and an operating air pipe 20 is provided at the other end.
But it is connected.

The working air pipe 20 is connected to the same air source (not shown) together with a pressurized air pipe 21 for pressurizing the delivery screw provided attached to the escapement 9, and the former is connected to the same air source (not shown). When operated, the escapement is actuated in the latter, and air is caused to flow in response to a signal sent from one nut to the delivery pipe 13.

In FIG. 3, the nose block 18 is provided with a nut introducing pipe 14 so as to introduce the nut to a predetermined position on the tool center line.

Furthermore, around the center line, a rotor 23 is provided with a socket hole 22 having the same polygonal prism inner surface as the nut for holding the nut and giving it rotation.
8 and a nose cap 24 screwed thereto.

On the other hand, the rotor 23 is located on the center line inside the main body sleeve 15.
A bit 25 having the same cross-sectional shape as the socket hole 22 is provided for transmitting rotation to the socket hole 22 .

Reference numeral 26 denotes a projection provided at the center of the end face of the bit 25, which fits into the hole of the nut and allows the nut to be correctly inserted into the socket hole 22.

Reference numeral 27 is a stopper for receiving the nut supplied through the introduction pipe 14 on the opposite side and keeping it at a predetermined position.

This stop 27 is configured so that it can be easily moved radially outward when the bit 25 is advanced into the socket hole 22.

Reference numeral 28 denotes a return prevention spring provided at the end of the introduction tube 14, and is provided in the nut introduction tube 14 so as to be inclined so as to protrude more toward the center of the tube as it goes in the nut feeding direction. The nut passing space is formed only when the nut passes through the tube end into the tool, and when the nut hits the stopper 27 and tries to return in the opposite direction, it is designed to prevent this.

Reference numeral 29 denotes a pair of jaws that are rotatably supported by the rotor 23 pin and are constantly pressed inward by a spring 31, and are used to hold the nut near the tip of the socket hole 22 so that it does not fly out. be.

Next, the operation of this device will be explained.

The Naratoi randomly placed into the hopper 4 are transferred onto the receiving plate 8 with their end faces horizontally (mouth state) by the rake 5 of the rotating drum 6, and then onto the chute 7 with their end faces vertically as shown in 11. The flow passes through the escapement 9, and then is sent to the delivery section 13 and the nut feed conduit 3 by compressed air.
It flows through the inside in the state shown in 2, passes through the introduction pipe, and reaches the stopper 27.
It is held with the end face sideways in a predetermined position by the return prevention spring 28 as shown in E.

When the nose block 18 is advanced relative to the sleeve 15, the protrusion 26 is inserted into the hole of the nut, and the stopper 27 is moved outward.

The shoulder 32 of the bit 25 then contacts the flat end of the nut, applying a thrust force to the nut and inserting it into the socket hole 22.

On the other hand, by operating the handle lever 19, the operating air pipe 20
Air pressure is transmitted to the tool body through the tool body, and the bit 25 is rotated by an air motor (not shown).

When the bit 25 is inserted into the socket hole 22, the rotational force of the bit 25 is transmitted to the socket hole 22, and the rotor 23 rotates between the nose block 18 and the nose cap 24.

This rotation is transmitted to the nut and the nut is tightened.

As explained above, the device of the present invention can perform each process of nut feeding, nut positioning, and nut tightening in a very short time by simply operating a lever and moving the tightening tool up and down. Since the nut feeding conduit has a rectangular entrance cross-sectional shape, the direction of the nut does not change during pressure feeding, and the nut can be fed to the final supply position in a predetermined state, and it also prevents the nut from returning. Because it is equipped with a spring-like anti-return mechanism, the nut is always kept in place, the nut introduction tube can be oriented downwards, and the tool can be used in any direction for tightening the nut. In addition, since the nut feed conduit is made of a flexible material, the tool can be brought to the desired position and direction when tightening the nut, and the nut being tightened can be moved to the desired position and direction. The shape and tightening of the body are significantly less restricted in position, 1 and have the effect of being extremely convenient in practical use.

Furthermore, by providing the rotor, the tip of the hand-type nut tightening tool becomes very compact, and since the tip is not opened, nuts can be tightened even in narrow spaces.

Also, since the tip is compact and conical, it can be easily aligned with the bolt.

Furthermore, the jaws provided inside the rotor grip the protruding end portion of the bolt to ensure centering of the hand-type tightening tool, thereby improving the reliability of nut tightening.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the entire nut tightening device in one embodiment of the present invention, Fig. 2 A is an enlarged vertical cross-sectional view of the nut feeding conduit, the mouth is an enlarged cross-sectional view of the same, and Fig. 3 is a nut tightening device. Tightening is an enlarged longitudinal sectional view of the main part of the tool. 1... Nut feeding device main body, 2... Nut tightening tool, 3... Nut feeding conduit, 11
...... Rectangular shaft hole of conduit, 14 ... Nut introduction pipe, 28 ... Return prevention spring.

Claims (1)

[Scope of utility model registration request] A nut separating and sending device comprising an escapement provided at the lower end of a chute arranged at an angle and separating and transporting the lowest nut among a plurality of nuts arranged on the chute; and this nut separating and sending device. A nut feeding conduit made of a flexible material and having a rectangular cross-sectional hole that fits the end face of the nut for receiving the nuts separated and transferred therein, and a nut introduction pipe connected to the outlet side of the nut feeding conduit. Nut tightening consists of a tool, which includes a stopper provided so as to come into contact with the nut conveyed to the nut introducing pipe, and a stopper that increases in the direction of the center of the pipe as it goes in the nut feeding direction. A return prevention panel that is inclined to protrude, a bit that has a rectangular cross section in the radial direction, has a protrusion at its tip with a diameter that fits into the hole of the nut, is rotatable and can move up and down, and a bit that has an inner shape a rectangular and rotatable rotor that can fit into the bit;
The rotor has a jaw attached to hold a nut provided inside the rotor, a nut tightening tool provided at the tip of the tool, and a nose cap attached to the outside of the rotor and having a conical tip. A nut supply tightening device characterized by: