JPH0976169A - Sleeve crimping device - Google Patents

Abstract

(57) An object of the present invention is to prevent accumulation of breaking debris in the sleeve caulking device so that the device does not become heavy with time, and also to eliminate the need to periodically discard the debris. A sleeve crimping device (1) according to the present invention includes:
A gripping mechanism that grips the tip of the bolt that is inserted into the sleeve nut, a tensioning mechanism that applies a tensile force to the gripping mechanism that grips the tip in the axial direction until the tip breaks, and a tensile reaction force A sleeve crimping device having a crimping mechanism for crimping the sleeve nut from the outer side in the radial direction is characterized by having vacuum generating means 21, 22 for sucking and ejecting the broken tip end portion of the bolt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gripping mechanism for gripping the tip of a bolt inserted through a sleeve nut, and an axial pulling force on the gripping mechanism for gripping the tip until the tip breaks. The present invention relates to a sleeve crimping device including a pulling mechanism that imparts a force and a crimping mechanism that crimps the sleeve nut from the outside in the radial direction by utilizing a pulling reaction force.

[0002]

2. Description of the Related Art Generally, a sleeve crimping device is a pistol-type handy type tool, and it has a gripping mechanism for gripping the tip of a bolt inserted in a sleeve nut and a gripping mechanism for gripping the tip. It is composed of a pulling mechanism that applies a pulling force in the axial direction and a crimping mechanism that uses the pulling reaction force to crimp the sleeve nut from the outside in the radial direction. Here, the tensioning mechanism can apply a tensile force to the gripping mechanism in the axial direction until the tip of the bolt breaks, and the tip of the broken bolt (hereinafter, referred to as breaking scrap) is It is stored in the catcher of the sleeve crimping device.

[0003]

However, in the sleeve crimping device, since the broken scraps are stored in the catcher, the device gradually becomes heavier as the broken scraps are collected. Therefore, the load applied to the wrist of the operator who holds the sleeve crimping device gradually increases,
There is a problem that work efficiency decreases. In addition, it is troublesome because the broken scraps accumulated in the catcher must be regularly discarded. A technical problem of the present invention is that by automatically and automatically discarding breaking scraps, the sleeve crimping device does not become heavy over time to prevent a decrease in work efficiency, and the breaking scraps are periodically removed. It also tries to eliminate the time and effort of throwing it away.

[0004]

[Means for Solving the Problems]

[Means according to Claim 1 for Solving the Problems] The problems described above are solved by a sleeve caulking device having the following respective structures. That is, the sleeve crimping device according to the present invention includes a gripping mechanism that grips the tip of a bolt that is inserted into a sleeve nut, and an axial pulling force on the gripping mechanism that grips the tip until the tip breaks. In a sleeve crimping device that includes a pulling mechanism that applies a force and a crimping mechanism that crimps the sleeve nut from the outside in the radial direction by using the pulling reaction force, a vacuum is generated by sucking and ejecting the broken tip end portion of the bolt. It is characterized by having means. That is, since the broken scrap (the tip portion of the bolt) is sucked by the vacuum generating means and discharged from the sleeve crimping device, it does not accumulate in the sleeve crimping device and the device does not become heavy with time. Further, it is not necessary to regularly dispose of the scraps.

[Means according to Claim 2 for Solving the Problems] This sleeve crimping device is the sleeve crimping device according to claim 1, wherein the sleeve crimping device has a substantially cylindrical gripping mechanism for gripping the tip of the bolt, and A vacuum pipe that communicates with the vacuum generating device; a pressure detecting device that detects the pressure in the vacuum pipe; and an operating device that operates the sleeve crimping device based on the pressure value detected by the pressure detecting device. There is. Therefore, when the tip of the bolt is inserted into the gripping mechanism, it becomes almost equal to the state in which one end of the vacuum pipe is closed, and the pressure in the vacuum pipe drops significantly from atmospheric pressure. Conversely, when the tip of the bolt is not inserted into the gripping mechanism or when the bolt is not completely inserted, one end of the vacuum pipe is opened, and the pressure in the vacuum pipe does not drop so much and is large. It becomes close to atmospheric pressure. Therefore, by detecting the pressure in the vacuum pipe by the pressure detecting means, it becomes possible to highly accurately determine whether or not the tip portion of the bolt is securely inserted into the gripping mechanism. Further, the actuating means actuates the sleeve caulking device based on the pressure value detected by the pressure detecting means, so that the sleeve caulking device can be automatically started with the tip of the bolt securely inserted in the gripping mechanism. As a result, the burden on the operator can be reduced, and operation mistakes can be prevented. Furthermore, it is possible to prevent forgetting the caulking.

[Means for Solving the Problem] According to a third aspect of the present invention, in the sleeve crimping device according to the first aspect, the broken tip of the bolt sucked by the vacuum generating means is detected. It is characterized in that it has a broken residue detecting means for Generally, in a sleeve crimping device, defective crimping occurs when the tip of the bolt comes off the gripping mechanism, and the tip of the bolt remains unbroken. Therefore, it is possible to determine that the caulking is good if the broken scrap detecting means can detect the broken tip of the bolt after the sleeve caulking operation. On the contrary, if the broken tip of the bolt cannot be detected, it can be determined that the caulking is defective. That is, it is possible to determine the quality of the caulking work by the broken dust detecting means.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] A sleeve crimping device according to a first embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is an overall piping system diagram of the sleeve caulking device according to the present embodiment, and FIG. 2 is a view as viewed from an arrow A in FIG. Further, FIG. 3 shows each step when the sleeve crimping work is performed by the sleeve crimping device. The sleeve crimping device 1 is a device for crimping the sleeve nut w from the outside in the radial direction and fixing it to the stud bolt wb.
The apparatus main body 2 (see FIG. 1), which is a portion for crimping the sleeve nut w, is provided. The device body 2 is a pistol-type handy-type tool, and is shown in FIGS.
As shown in FIG. 5, a chuck 12 for gripping the sleeve nut w is attached to the tip end portion thereof coaxially with the main body case 18 so as to be displaceable by a predetermined dimension in the axial direction. Further, behind the chuck 12, a substantially ring-shaped nose piece 14 for crimping the sleeve nut w gripped by the chuck 12 from the outside in the radial direction is coaxial with the chuck 12, and with respect to the main body case 18. It is positioned so that it cannot move relative to it.

A stud bolt wb inserted in a sleeve nut w (see FIG. 3) is provided behind the nosepiece 14.
A jaw 16 and a jaw case 17 for gripping the tip of the nosepiece 14 are mounted coaxially with the nosepiece 14.
The tapered outer peripheral surface 16t of the jaw 16 is in surface contact with the tapered inner peripheral surface 17t of the jaw case 17, and the relative movement of the both 16, 17 in the axial direction causes the jaw 16 to move in the radial direction by the action of the tapered surface. Displace. This allows the jaw 16 to grip the tip of the stud bolt wb. Further, the jaw 16 and the jaw case 17 are connected to an air cylinder (not shown) fixed to the main body case 18, and the inside of the main body case 18 is pulled in the axial direction by the air cylinder. .

As shown in FIG. 1, high pressure air is supplied to the main body 2 of the apparatus through a main pipe 23, and the high pressure air drives the air cylinder. Further, a main valve 23v for supplying / stopping high-pressure air to the apparatus main body 2 is attached in the middle of the main pipe 23. The main valve 23v
Operates based on an operation signal output from the control panel 30, and the main valve 23v is opened and closed to automatically drive / stop the air cylinder. If the sleeve crimping device 1 is switched to manual activation, the operator can operate the air cylinder by pulling the trigger 2t of the device body 2.

In the air cylinder, the tip portion of the stud bolt wb held by the jaw 16 has a notch portion w.
The jaw 16 and the jaw case 1 until the fracture from k
A pulling force can be applied to 7.
Then, while the tensile force is being applied, the sleeve nut w is attached to the nose piece 14 as described later.
Crimped by. On the other hand, the jaw 16 and the jaw case 17 move axially within the main body case 18 by a predetermined distance due to the breakage of the tip end of the stud bolt wb, and then the original position by the force of a spring (not shown), That is, as shown in FIG. 2, the outer surface of the jaw case 7 is returned to a position where it contacts the inner surface of the nose piece 14. That is, the jaw 16 and the jaw case 17 correspond to the gripping mechanism of the present invention, and the air cylinder corresponds to the pulling mechanism. Further, the main valve 23v, the control panel 30 and the like function as the operating means of the present invention.

As shown in FIG. 2, the jaw 16 is positioned at the tip of a suction passage 19 formed in the main body case 18 to form a part of the suction passage 19, and further, the jaw 16 is formed. 16 walls and jaw case 1
Bypass passages 16b and 17b are formed in the wall portion of 7 to connect the suction passage 19 and the outside. The bypass passages 16b and 17b are closed by the tip of the stud bolt wb when the tip of the stud bolt wb is correctly inserted into the jaw 16 by a predetermined dimension.

The suction passage 19 is a tip portion of the stud bolt wb which is broken after the caulking (hereinafter referred to as a broken scrap).
1 is connected to the rear end portion thereof, as shown in FIG. The vacuum pipe 21 has an inner diameter enough to allow the breakage to pass therethrough, and the other end thereof is connected to the vacuum generating mechanism 22. Therefore, when the vacuum generating mechanism 22 operates, the broken waste in the suction passage 19 passes through the vacuum pipe 21 and the vacuum generating mechanism 2
Guided up to 2. Further, the vacuum generating mechanism 22
The scraps that have been guided up to the recovery box 2 by the feed pipe 25
It is sent to 4 and collected here.

The vacuum generating mechanism 22 has a structure for generating a negative pressure by the flow of high-pressure air, and is connected to the tip of a branch pipe 26 branched from a main pipe 23 which is a high-pressure air source. In the middle of the branch pipe 26, high pressure air is supplied to the vacuum generating mechanism 22.
A starting valve 26v for stopping is attached. The start valve 26v operates based on an operation signal output from the control panel 30, and the start valve 26v
The vacuum generation mechanism 22 is activated / opened by opening / closing
Stop.

A pressure gauge 21p for detecting the pressure inside the vacuum piping 21 is attached to the vacuum piping 21, and a pressure signal of the pressure gauge 21p is input to the control panel 30. Here, when the tip portion of the stud bolt wb is correctly inserted into the jaw 16, the tip of the jaw 16 and the bypass passages 16b and 17b are closed, and the pressure in the vacuum pipe 21 is significantly reduced from atmospheric pressure. To do. On the contrary, the stud bolt w is attached to the jaw 16.
In the state where the tip of b is not inserted or the insertion is incomplete, the tip of the jaw 16 or the bypass passage 1
6b and 17b are opened, and the vacuum pipe 2
The pressure in 1 does not drop so much and approaches the atmospheric pressure. The control panel 30 can determine whether or not the tip of the stud bolt wb is correctly inserted into the jaw 16 by comparing the pressure signal of the pressure gauge 21p with a set value.

A metal passage sensor 21m is installed in the vacuum pipe 21, and a signal from the metal passage sensor 21m is input to the control panel 30. The metal passage sensor 21m is a sensor for detecting the passage of broken scraps.
The number of passing scraps is counted based on the signal from 1 m. If the specified number of broken scraps are not detected by the metal passage sensor 21m within the working time of one process, it is determined that the work is forgotten or the caulking is defective, and the control panel 3
An alarm buzzer and a lamp (not shown) of 0 are activated, and an interlock signal is transmitted from the control panel 30 to the assembly line to stop the assembly line. Further, even when the pressure in the vacuum pipe 21 rises to near atmospheric pressure during the crimping, the stud bolt wb
It is judged that the tip end of the
The alarm buzzer and lamp are activated and the assembly line is stopped by the interlock signal from the control panel 30. That is, the metal passage sensor 21m and the control panel 30 correspond to the broken dust detecting means of the present invention.

Next, the operation of the sleeve caulking device 1 according to the present embodiment will be described with reference to FIGS. First,
The vacuum generation mechanism 22 is activated by opening the activation valve 26v. Further, as shown in FIG. 3A, the sleeve nut w is set on the chuck 2 of the apparatus main body 2. In this state, since the tip of the jaw 16 and the bypass passages 16b and 17b are still open, the pressure in the vacuum pipe 21 does not drop so much and is close to the atmospheric pressure.

Next, as shown in FIG. 3B, when the stud bolt wb is passed through the sleeve nut w and the tip of the stud bolt wb is inserted into the jaw 16 by a prescribed amount, the The tip of the jaw 16 and the bypass passages 16b and 17b are closed, and the pressure in the vacuum pipe 21 is significantly reduced from atmospheric pressure. The control panel 30 compares the pressure in the vacuum pipe 21 detected by the pressure gauge 21p with a set value to determine whether or not the tip of the stud bolt wb is correctly inserted into the jaw 16. Then, when it is determined that the tip of the stud bolt wb is correctly inserted into the jaw 16, the control panel 3
0 outputs a signal for opening the main valve 23v of the main pipe 23. As a result, the main valve 23v is opened and the air cylinder of the apparatus main body 2 is driven.

By driving the air cylinder, the tip of the stud bolt wb is held by the jaw 16 and the jaw 16 and the jaw case 17 are held.
Is pulled in the axial direction. That is, in the state shown in FIG. 3B, the tip of the stud bolt wb is pulled rightward in the figure. As a result, a pulling reaction force is applied to the main body case 18 that fixes the air cylinder, and the substantially ring-shaped nose piece 14 that is fixed to the main body case 18 is held by the chuck 12 with the sleeve nut w left in the figure. Press in the direction. Here, since the chuck 12 can be axially displaced with respect to the main body case 18 by a predetermined dimension, when the nose piece 14 presses the sleeve nut w in the state shown in the drawing, the nose piece 14 is moved relative to the sleeve nut w. The sleeve nut w is swaged by the nose piece 14 from the outside in the radial direction.

Then, the caulking ends with the movement of the nosepiece 14 with respect to the sleeve nut w stopped, and as shown in FIG. 3C, the tip portion of the stud bolt wb is cut by the pulling force of the jaw 16. Break from wk. As a result, the jaw 16 and the jaw case 17 are moved by a certain distance in the axial direction and returned to their original positions by the force of the spring. In this process, as shown in FIG. 3D, the tip of the jaw case 17 protrudes the sleeve nut w from the nose piece 14, and the tip of the broken stud bolt wb (broken scrap) separates from the jaw 16. In this way, as shown in FIG. 3E, one cycle of the caulking work of the sleeve nut w is completed.

Here, the broken waste is guided from the suction passage 19 through the vacuum pipe 21 to the vacuum generating mechanism 22 and is further sent to the recovery box 24 by the feed pipe 25 and is recovered there. Then, the breakage residue passes by the position of the metal passage sensor 21m, and the passage of the breakage residue is counted by the control panel 30. As described above, when the specified number of broken scraps are not detected by the metal passage sensor 21m within the working time of one process, the alarm buzzer and the lamp of the control panel 30 are activated as if the work is forgotten or the caulking is defective. The assembly line is stopped by the interlock signal from the control panel 30. Further, even when the pressure in the vacuum pipe 21 rises to near atmospheric pressure during caulking, it is determined that the tip of the stud bolt wb has come off the jaw 16, and the alarm buzzer and the lamp of the control panel 30 operate, and The assembly line is stopped by the interlock signal from the control panel 30.

As described above, according to the present embodiment, the scraps are sucked by the vacuum generating mechanism 22 and discharged from the apparatus main body 2, so that the apparatus does not accumulate in the apparatus main body 2 and the apparatus is aged. It doesn't get heavy. Further, it is not necessary to regularly dispose of the scraps. Further, since the pressure gauge 21p detects the pressure in the vacuum pipe 21 and operates the sleeve crimping device based on the detected pressure value, there is no erroneous operation and the operator does not need to pull the trigger 2t, which reduces the burden. It Also, forgetting the caulking can be prevented. Further, since it is possible to confirm the integrated number of the tip portions of the bolts within one process working time, it is possible to quickly detect the caulking failure, that is, the state in which the tip portions of the stud bolts wb are left without being broken. Become. Therefore, as compared with the conventional method in which the operator determines the caulking defect based on the breaking sound of the stud bolt wb, the defect detection accuracy is higher.

Although the embodiments of the present invention have been described above, the embodiments of the present invention have the following various technical items in addition to the technical items described in the claims. Please note that. (1) In the sleeve crimping device according to claim 2, a bypass passage is formed in the gripping mechanism to communicate the inside and outside of the gripping mechanism, and the bypass passage has a tip portion of the bolt. A sleeve crimping device characterized by being closed by a tip portion of the sleeve when it is inserted into a gripping mechanism by a specified amount. That is, one end of the vacuum pipe is closed while the tip of the bolt is inserted into the gripping mechanism by a specified amount, and the pressure in the vacuum pipe is significantly reduced from the atmospheric pressure. Therefore, it becomes possible to accurately determine whether or not the tip of the bolt is correctly inserted into the gripping mechanism.

[0023]

According to the present invention, since the scraps are sucked by the vacuum generating means and discharged to the outside, they do not accumulate inside and the apparatus does not become heavy over time.
Therefore, the burden on the worker is reduced and the work efficiency is improved. In addition, since it is not necessary to regularly dispose of the broken pieces, work efficiency is improved.

[Brief description of drawings]

FIG. 1 is an overall piping system diagram of a sleeve crimping device according to an embodiment of the present invention.

FIG. 2 is a view on arrow A in FIG.

FIG. 3 shows each step when performing the caulking work by the sleeve caulking device according to the embodiment of the present invention.

[Explanation of symbols]

 w Sleeve nut wb Stud bolt 2 Device main body 14 Nose piece (caulking mechanism) 16 Jaw (holding mechanism) 17 Jaw case (holding mechanism) 21 Vacuum piping 21p Pressure gauge (pressure detecting means) 21m Metal passage sensor (breaking scrap detecting means) ) 22 vacuum generation mechanism 23v main valve (operating means) 30 control panel

Claims (3)

[Claims] 1. A gripping mechanism for gripping a tip of a bolt inserted through a sleeve nut, and a tensioning mechanism for applying a tensile force to the gripping mechanism gripping the tip in the axial direction until the tip breaks. A sleeve crimping device that crimps the sleeve nut from the outside in the radial direction by using the pulling reaction force, and a vacuum generating means for sucking and ejecting the broken tip end portion of the bolt. And sleeve caulking device. 2. The sleeve crimping device according to claim 1, wherein a vacuum pipe for communicating a substantially cylindrical gripping mechanism for gripping a tip portion of the bolt and the vacuum generating means, and a pressure in the vacuum pipe. A sleeve crimping device comprising: a pressure sensing device for sensing; and an actuating device for actuating the sleeve crimping device according to the pressure value detected by the pressure sensing device. 3. The sleeve caulking device according to claim 1, further comprising a broken scrap detecting means for detecting a broken tip of the bolt sucked by the vacuum generating means.