JPH10263953A - General-purpose press-in device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a general-purpose press-in device which can make the whole of the device small in size, can make its structure simple, can facilitate its maintenance, and can handle different kinds of parts to be pressed in by one station. SOLUTION: Ball nuts each are rotatably mounted to the casings 46 at both the sides of the main body frame 40' of a press-in device main body 40. Master screws are threadedly engaged with the respective ball nuts, and the ball nuts are connected with a servo motor with gears. Paired guide rails 55 where paired bearings are engaged with the rails are provided in a straight line between the paired casings 46, the respective master screws are connected with the bearings at the rear side one out of the paired bearings, and furthermore, a press-in shaft 66 is provided in front of the rear side bearing, by way of a load cell. A guide holder having the guide hole of the press-in shaft 66 and a stopper, are fixed to the front side bearing. A press-in part supplying device is provided, which connects the paired bearings with a compression spring, and disposes a steel ball in the guide hole. Paired leak testing devices 79 are provided over paired press-in devices 45, and an elevating device 92 is provided down below.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press-fitting device in which a steel ball is press-fitted into an oil hole of a press-fitted object, for example, a camshaft as an engine part of an automobile, and after the press-fitting, a leak test of the press-fitted portion is performed. Things.

[0002]

2. Description of the Related Art An outline of a conventional press-fitting device will be described with reference to FIGS. 7 and 8, what is indicated by reference numeral 1 is a press-fitting device conventionally used. The press-fitting device 1 includes an inspection station ST1 for identifying the type of the press-fitted object W, a first press-fitting station ST2 for press-fitting the steel ball W1 into the press-fitted product W, a second press-fitting station ST3, and a third press-fitting station ST4. , 4th press-fitting station ST5, 5th
Press-fitting station ST6 A leak test station ST7 for detecting leakage of the press-fitted object W after press-fitting at the press-fitting portion is provided. Each of these press-fit stations ST2, ST3,
ST4, ST5, and ST6 are provided according to the number of types of the press-fitted object W.

The above press-fitting stations ST2, ST3, ST4
, ST5 and ST6 will be described. Press Fit Station ST2
, ST3, ST4, ST5, ST6 are provided on the main body frame 2 of the press-fitting device main body 1 and are formed by a pair of opposing press-fitting units 3. Each of the pair of press-fit units 3 has substantially the same structure.

A base 4 is fixed on the upper part of the main body frame 2. Each press fitting station ST is mounted on the base 4.
2, ST3, ST4, ST5, ST6 holder guides 5 are fixed. A guide hole 6 is formed in the holder guide 5 so as to face the press-fitting side, that is, penetrate horizontally so as to face each other.

A press-fit holder 7 is slidably fitted in the guide hole 6. As shown in FIG. 9, a flange 7 'is formed at the base end of the press-fit holder 7, and a guide hole 8 penetrating from the base end to the tip end is formed at the center. A support bracket 9 is fixed to the base 4, and a press-fit cylinder 10 is attached to the support bracket 9. A knuckle 11 is screwed into a piston rod 10 ′ of the press-fit cylinder 10, and a small-diameter projection 11 ′ is formed on a tip side of the knuckle 11.

A first connecting member 13 is connected to the small-diameter projecting portion 11 'via a collar 12. The first connecting member 13
The base large-diameter portion 13a, the central small-diameter portion 13b, and the distal large-diameter portion 13c are formed.
13a ', the central small-diameter portion 13b has a central small-diameter connecting hole 13b'.
However, a large-diameter connecting hole 13c 'is formed in the large-diameter portion 13c. These connection holes 13a ', 13b', 13c '
Are communicated with each other.

The connection between the first connecting member 13 and the small diameter projecting portion 11 'of the knuckle 11 is performed by connecting the small diameter projecting portion 11' to the first connecting member.
13 and inserted into the large-diameter connection hole 13a 'at the base end and fastened by bolts (not shown).

A second connecting member 14 is disposed between the first connecting member 13 and the press-fit holder 7, and the second connecting member 14 is provided.
A sliding hole 14 ′ is provided at the center of 14. Sliding hole 1
The flange 7 'of the press-fit holder 7 is slidably fitted to the distal end of the 4', and the large-diameter portion 13c of the first connecting member 13 is slidably fitted to the proximal end. ing. Second connecting member 14
The press-fit holder 7 from the second connecting member 14 and the first connecting member
A retaining stopper 15 for preventing the 13 from coming off is fixed.

The distal end of the press-fit shaft 16 is slidably fitted in the guide hole 8 of the press-fit holder 7, and the base end of the press-fit shaft 16 is connected to the large-diameter connection hole 13 c of the first connection member 13. ′ And the central small-diameter connection hole 13b ′ so as to protrude into the proximal large-diameter connection hole 13a ′, and is fixed to the first connection member 13 with bolts in this state. In addition, the base end large-diameter connection hole 1 of the first connection member 13.
In 3a ', an adjustment plate 17 is provided between the base end of the press-fit shaft 16 and the small-diameter projection 11' of the knuckle 11. The adjusting plate 17 adjusts the position of the tip of the press-fit shaft 16.

The sliding hole 14 'of the second connecting member 14 has a sliding hole 1
A spring 18 is provided along 4 '. The distal end of the spring 18 is locked in a large-diameter hole 8 ′ drilled on the proximal end side of the press-fit holder 7, and the proximal end of the spring 18 is located in the distal large-diameter coupling hole 13 c ′ of the first connecting member 13. It is locked to.
That is, the spring 18 is connected to the press-fit holder 7 and the first connecting member.
13 and always press-fit holder 7 on the tip side,
That is, the spring is urged toward the holder guide 5 side.

Further, a steel ball supply hole 20 communicating with the guide hole 8 is formed in the press-fit holder 7.
A steel ball supply hole 19 communicating with the holder guide 5 is formed in the holder guide 5.

7 and 8, for example, between the left end Wa of the object to be press-fitted W and one side of the main body frame 2, ie, the holder guide 5 on the left side, and Between the right end Wb of the object W and the other side of the main body frame 2, that is, the right side holder guide 5,
As shown in FIG. 9, a backup support member 21 with the inclined contact portion 21 'directed downward is fixed to the upper side. Both the left and right backup support members 21 are configured to allow the press-fit holder 7 to pass therethrough.

A press-fit backup 22 having an inclined contact portion 22 ′ capable of contacting the inclined contact portion 21 ′ of the backup support member 21 is provided upright on the lower side of the main body frame 2 so as to be able to move up and down. The press-fit backup 22 is connected to a piston rod 23 ′ of a backup cylinder 23 fixedly supported on the main body frame 2.

The leak test station ST7 is provided with a pair of leak test devices (not shown) facing each other. The leak test device has substantially the same structure as that of the present invention described later, and a description thereof will be omitted.

Next, based on FIG. 7, each station ST
1, the press-fitted object transfer device 24 disposed above the ST2, ST3, ST4, ST5, ST6, and ST7 will be described. In the drawing, reference numeral 25 denotes a base of the object-to-be-pressed transferred device 24. A manipulator 26 is provided below the base 25. The manipulator 26 is connected and supported by a piston rod 27 'of a cylinder 27 fixed to the base 25.

A bearing 28 is fixed to the upper portion of the base 25, and the bearing 28 is attached to the main body frame 2.
Inspection station ST1 to leak test station ST7
It is slidably fitted on a guide rail 29 fixed over the entire area (see FIG. 2). Further, a ball nut 30 is fixed to an upper portion of the base 25 between the bearings 28. The ball screw 30 is screwed into the main body frame 2 in parallel with the guide rail 29 and rotatably supported with a lead screw 31. The lead screw 31 is rotated by a servo motor (not shown).

A steel ball stocker 32 is mounted on the upper part of the main body frame 2. Steel ball stocker 32 is supply hose
Through 33, it is connected to the steel ball supply hole 19 shown in FIG. The steel ball stockers 32 are provided in pairs at each press-fitting station. In FIG. 8, reference numeral 34 denotes a control device, and reference numeral 35 denotes a hydraulic unit. The hydraulic circuit of the hydraulic unit 35 is connected to each press-fit cylinder 10 via a pressure reducing valve and a solenoid valve.

Next, the operation of the conventional press-fitting device will be described.
First, it is assumed that all devices are in their original positions. Therefore,
The operator places the press-fitted object W on the press-fitted object receiver (not shown) of the inspection station ST1 and turns on the start switch.
When the start switch is turned on, the cylinder
27 operates, the piston rod 27 'extends, and the manipulator 26 descends. When the manipulator 26 descends, the press-fitted object W is grasped, the type of the press-fitted object W is identified, and an identification signal is transmitted to the control device 34 (see FIG. 8).

When the manipulator 26 grips the object W to be pressed, the piston rod 27 'of the cylinder 27 is shortened, and the object W is raised together with the manipulator 26. When receiving the identification signal from the manipulator 26, the control device 34 transmits the identification signal to a servomotor (not shown) of the lead screw 31.

Then, the servomotor rotates the lead screw 31 by a predetermined number according to the type of the press-fitted object W, and the servomotor is held by the base 25 and the manipulator 26 via the lead screw 31 and the ball nut 30. The press-fitted object W is moved to the upper part of the press-fitting station.

For example, if the object to be pressed W corresponds to the first press-fitting station ST2, the first press-fitting station ST2
If it is the press-fitted object W corresponding to the fifth press-fitting station ST6 up to 2, it is moved to the fifth press-fitting station ST6.

When the press-fitted object W reaches the press-fitting station, the cylinder 27 of the press-fitted material transfer device 24 is operated again, the piston rod 27 'is extended, the manipulator 26 is lowered, and the press-fitted material W is removed. At the press-fitting station,
It is placed on a not-shown object to be pressed and positioned. The manipulator 26 having the press-fitted object W placed on the press-fitted object receiver of the press-fitting station is connected to the piston rod 2 of the cylinder 27.
Shorten 7 'and rise to stand by at that position.

When the press-fitted object W is placed and positioned in the press-fitted object receiver of the press-fitting station, for example, a right-side backup cylinder 23 shown in FIG. The rod 23 'extends to raise the press-fit backup 22 and slide in contact with the right end Wb of the press-fitted object W to support the press-fitted object W from the right side.

At this time, the inclined contact portion 22 ′ of the right press-fit backup 22 is connected to the inclined contact portion 2 of the backup support member 21.
1 ′, so that the left end Wa of the press-fitted object W is
Powerful backup against pressure from

On the other hand, when the control device 34 receives the identification signal from the manipulator 26, one side of the press-fitting station,
That is, the steel ball stocker 32 of the press-fitting station provided on the left side of FIG. 7 is opened, and the steel ball W1 is connected to the steel ball supply hole 1 of the holder guide 5 via the supply hose 33 as shown in FIG.
9. Press-in holder 7 through steel ball supply hole 20 of press-in holder 7
Is supplied to the guide hole 8.

Therefore, as described above, when the object to be press-fitted W is supported from the right side, the solenoid valve of the press-fit cylinder 10 on the left side of the press-fitting station of the hydraulic circuit of the hydraulic unit 35 opens, and the press-fit cylinder 10 is operated. Extend the piston rod 10 '. Then, the left press-fit shaft 16 and the press-fit holder 7 are both advanced.

When the press-fit shaft 16 and the press-fit holder 7 advance together, the press-fit holder 7 passes through the left backup support member 21 and abuts against the left end Wa of the object to be pressed W, and stops at that position.

However, the piston rod 10 'of the left press-fit cylinder 10 further extends (see FIG. 9). At this time, the steel ball W1 has already been supplied to the guide hole 8 of the press-fit holder 7, and the tip of the press-fit shaft 16 is located just behind the steel ball W1. The steel ball W1 advances while pressing against the force, and the steel ball W1 is pressed into a predetermined position of the through hole W 'of the object to be pressed W.

When the steel ball W1 is press-fitted, the left press-fit cylinder 10 and the right backup cylinder 23 return to their original positions. That is, the press-fit holder 7, the press-fit shaft 16 and the press-fit backup 22 return to their original positions. In the above description, the press-fitting means from the left end Wa of the press-fitted object W has been described. However, the press-fitting means to the right end of the press-fitted W is almost the same, and the description is omitted.

As described above, when the press-fitting operation of the press-fitting station is completed, the cylinder 27 of the press-fitted material transfer device 24 shown in FIG. 7 is operated again, the piston rod 27 'is extended, and the manipulator 26 is lowered. The press-fitted object W after steel ball press-fitting is gripped by the manipulator 26, a servo motor (not shown) is operated to rotate the lead screw 31 by a predetermined number, and the press-fitted press-fitted material W to the leak test station ST7. Transport. Then, the press-fitted object W is placed and positioned on a not-shown press-fitted object receiver provided at the leak test station ST7.

When the press-fitted object W after the steel ball press-fitting is positioned at the leak test station ST7, the press-fitted press-fitted product W after the press-fitting is masked from both sides by a pair of leak test devices (not shown) to supply compressed air. To conduct a leak test of the steel ball press-fitting part. That is, the quality of the press-fitted portion into which the steel ball W1 is pressed is determined.

When the leak test after the steel ball is inserted into the object to be injected W is completed, the manipulator 26 of the object to be injected transporting device 24 grips the object to be injected W after the injection, and the unillustrated object to be inserted at the inspection station 1 is not shown. One cycle is completed when the press-fitted object W is placed on the receiver and the operator takes out the press-fitted press-fitted object W.

[0033]

In the conventional press-fitting apparatus described above, a dedicated press-fitting station is provided in accordance with the type of the press-fitted object. As a result, the entire press-fitting device becomes large, the installation area is increased, and the manufacturing cost is increased. Further, there has been a problem that the structure becomes extremely complicated and maintenance work becomes extremely difficult.

The present invention has been made in view of the above problems, and has been made to reduce the size of the entire apparatus, reduce the installation area, reduce the manufacturing cost, and simplify the structure to facilitate maintenance work. It is an object of the present invention to provide a general-purpose press-fitting device capable of processing different types of press-fitted objects in one press-fitting station.

[0035]

According to the first aspect of the present invention,
In a pair of press-fitting devices for press-fitting a press-fitting component into a press-fitted object, casings are provided on both sides of a body frame of a press-fitting device main body of the press-fitting device, and ball nuts are rotatably mounted on the pair of casings, respectively. Each of the lead screws is rotatably screwed to the ball nut, and the ball nut and the servomotor are connected via a rotation drive means. The lead screw and the axis are parallel to each other between the pair of casings. The two guide rails are arranged linearly and at intervals so that a pair of bearings are slidably fitted to the two guide rails, respectively. Each of the lead screws is connected to a bearing located on the rear side in the forward direction toward the inside from both sides of the main body frame, and a press-fit shaft extending toward the front side via a load detecting means is attached, Of the pair of bearings, a guide holder provided with a guide hole in which the press-fit shaft is slidably fitted is fixedly supported on a bearing located on the front side in the forward direction, and the press-fit shaft press-fits a press-fit component. When press-fitting an object, press-fit backup means are provided to abut against and hold the side opposite to the side on which the press-fitted object is press-fitted, and the pair of bearings is always held between the bearings of the pair of bearings. A press-fit component supplying means for supplying and arranging press-fit components in respective guide holes of the guide holder is provided, each of which is provided with a repulsive biasing means for repelling and biasing in a separating direction, and after press-fitting the pair of press-fitting devices. A pair of leak test devices for performing a leak test by masking the press-fitted object and supplying compressed air to the press-fitted portion into which the press-fitted components are press-fitted are disposed facing each other, and disposed between the pair of press-fitted devices. And Serial with placing position the press-fit material and is characterized in that a lifting device for raising and lowering between said 該被 pressed product with the pair of press-fitting apparatus a pair of leak testing apparatus.

For example, when a press-fitting component is press-fitted into one end of an object to be press-fitted by the general-purpose press-fitting device configured as described above, if the press-fitting device main body is started, the press-fitting component supply means causes one of the press-fitting components. Is supplied to the guide hole of the side guide holder. At the same time, in order to back up the other end of the object to be press-fitted, the servomotor on the other side is operated and the ball nut on the other side is rotated forward via the rotation driving means.

Due to this forward rotation, the lead screw located on the other side screwed to the ball nut advances toward the inside from the side of the main body frame without rotating. Since the leading end of this lead screw is connected to the bearing located on the rear side of the pair of bearings on the other side, the rear bearing is pressed by the lead screw and moves on the guide rail from the side of the main body frame. Go inward.

The bearings of the pair of bearings on the other side are always resiliently biased and connected in the separating direction by the resilient biasing means, so that the bearing located on the front side of the pair of bearings is also resilient. The guide rail moves forward on the guide rail via the biasing means.

When the pair of bearings on the other side advance on the guide rail, the guide holder located on the front side comes into contact with the object to be press-fitted, and the advance of the bearing on the front side of the pair of bearings stops.

However, since the servomotor is still operating, the rear bearing of the pair of bearings moves forward against the resilient force of the resilient urging means, and the lead screw is moved to the predetermined press-fit backup position. Move up to At this time, the press-fit shaft connected to the lead screw enters the through-hole of the object to be pressed, and the rear bearing comes into contact with the press-fit backup means.

When the lead screw moves to the predetermined press-fitting backup position in this way, the servomotor on the side for press-fitting the press-fitted component into the press-fitted object operates to rotate its rotary drive shaft forward. As a result, the lead screw advances, the pair of bearings advances on the guide rail, the guide holder comes into contact with the object to be pressed, and the advance of the bearing on the front side of the pair of bearings stops.

However, since the servomotor on the side for press-fitting the press-fitting parts is still operating, the rear bearing of the pair of bearings on one side moves forward against the resilient force of the resilient biasing means. Then, the lead screw is moved to a predetermined press-fitting position.

At this time, the press-fitting shaft connected to the lead screw via the load detecting means penetrates into the through-hole of the object to be press-fitted while pressing the press-fitting component supplied to the guide hole of the guide holder. A press-fit part is pressed into a predetermined position of the hole. On the other hand, the bearing of the lead screw on the backup side comes into contact with the press-fitting backup means, so that the press-fitting of the press-fitting part on one side is reliably backed up.

A predetermined pressure input range is set in the load detecting means. For example, when the diameter of the through-hole of the object to be pressed is larger than the diameter of the sphere of the pressed-in part, the pressure input becomes small. The load detecting means detects this as a low load, causes an abnormal press-fit, and stops the apparatus.

On the contrary, when the diameter of the through-hole of the object to be pressed is smaller than the diameter of the ball of the press-fitted part, the press-in force becomes large, so that the load detecting means detects this as a high load and similarly press-fits. Stop the device as abnormal.

When the press-fitting of the press-fitted part is completed in this way, the lead screw on the press-fitted side is stopped and waits at the press-fitting position, and then press-fits the press-fitted part on the backed-up side of the object to be pressed. For this reason, the rotational drive shaft of the servo motor on the back-up side is reversed, and the lead screw is retracted to the original position.

When the lead screw retreats to its original position, the press-fitted component is supplied to the guide hole of the guide holder by the press-fitted component supply means on the backup side. Then, the rotary drive shaft of the backed-up servomotor rotates forward to advance the lead screw to the press-fitting position, and press-fit the press-fit component into a predetermined position of the through-hole of the object to be press-fitted. At this time, the lead screw on the side press-fitted earlier is pressed by the bearing by the press-fit backup means, and the press-fit is reliably backed up.

When the press-fitted parts are press-fitted from both sides into the predetermined position of the through-hole of the press-fitted object, the rotary drive shafts of the two servo motors are rotated in reverse to move the lead screw back to the original position. Then, the lifting device operates to raise the press-fitted object after press-fitting to the leak test position of the pair of leak test devices. Then, a pair of leak test devices are operated, and the press-fitted object after press-fitting is airtightly masked from both sides.

Then, the compressed air is supplied to the press-fitting portions of the press-fitting parts on both sides of the press-fitted object after the press-fitting component is pressed, and the leak test is simultaneously performed by the leak tester. When the leak test of the object to be pressed is completed, the masking from both sides of the object to be pressed after the leak test is released, and the lifting / lowering device is lowered to return to the original position. That is, the press-fitted object after the leak test descends to the original mounting position.

[0050]

FIG. 1 shows an example of an embodiment of the present invention.
6 to 6, the same members as those in FIGS. 7 to 9 are denoted by the same reference numerals and described. As shown in FIG. 1, the general-purpose press-fitting device according to the present invention has a pair of left-right symmetric structures. Therefore, the left-side structural portion in FIG. There are things on the side. Further, when press-fitting the press-fitted component into the press-fitted object W, the one side and the other side bearings 48 and the like and the front and rear positions in the moving direction thereof are directed inward from the side of the main body frame 40 'in the forward direction. Is set as

In the figure, reference numeral 40 denotes a press-fitting device main body. As shown in FIG. 1, the press-fitting device main body 40 detects a press-fit portion 41 for press-fitting a steel ball W1 (see FIG. 6) as a press-fitting component into the press-fitted object W, and detects leakage of the press-fitted material W after press-fitting. A press-fitting part supply unit 44 for supplying the steel ball W1 to the press-fitting unit 41, and a press-fitting part supply unit 44 for moving the press-fitted object W from the press-fitting unit 41 to the leak testing unit 42. Have been.

First, the press-fit portion 41 will be described mainly with reference to FIG. 1 and FIGS. The press-fitting section 41 is provided with a pair of press-fitting devices 45 facing each other. 4 to 6 is a press-fitting device 45 on one side of a pair of press-fitting devices 45.
Is enlarged. Since the press-fitting devices 45 on one side and the other side have the same structure, the press-fitting device 45 on one side will be described as an example.

A casing 46 is fixed to the body frame 40 'of the press-fitting device body 40.
A bearing 48 (see FIGS. 4 and 5) is mounted. A nut holder 49 is rotatably supported by the bearing 48, and a ball nut 47 '(see FIG. 5) is fixed to the nut holder 49. A lead screw 47 is rotatably screwed into the ball nut 47 '. Also, nut holder 49
Gears (not shown) are mounted at appropriate places.

As shown in FIGS. 4 and 5, a stopper 50 is fixed to the base end of the lead screw 47.
A protective cover 51 for protecting the base end is attached (see also FIGS. 1 to 3). As shown in FIG. 2, a servo motor is provided on the main body frame 40 'of the press-fitting device main body 40.
52 is fixed (see also FIGS. 3 and 5). A gear (not shown) is mounted on the rotation drive shaft of the servo motor 52.

Further, the body frame 4 of the press-fitting device body 40
A gear box 53 is fixed to 0 '(see FIGS. 2 and 3).
And FIG. 5), and a rotating shaft (not shown) is rotatably provided in the gear box 53. This rotating shaft is provided with a pair of gears, one of which is a servomotor
The gear on the other side meshes with the gear mounted on the nut holder 49, while the gear on the other side meshes with the gear mounted on the rotary drive shaft 52. That is, the rotation shaft in the gear box 53 is located at an intermediate portion between the nut holder 49 and the servomotor 52 and connects the two.

Therefore, when the servo motor 52 is operated and its rotary drive shaft rotates, the rotation is performed by the gear of the rotary drive shaft, the gear on one side of the rotary shaft in the gear box 53, and the gear and nut on the other side. It is transmitted to the gear of the holder 49, and the rotation of the nut holder 49 causes the nut holder 49 to rotate.
And the integrated ball nut 47 'rotates. As a result, the lead screw 47 screwed into the ball nut 47 'moves forward.

That is, the rotational drive transmitting means constituted by the gear of the rotational drive shaft of the servo motor 52, a pair of gears on one side and the other side of the rotational shaft in the gear box 53, and the gear of the nut holder 49 is provided. The nut holder 49 and the servo motor 52 are connected via the nut holder 49.

Further, as shown in FIG.
The casing 46 on one side of the main body frame 40 ′, and the elevating cylinder 94 of the elevating part 43 located substantially at the center of the press-fitting device main body 40.
The base 54 is fixed between the base 54 and the base 54 (see FIG. 1).
A guide rail 55 is fixed to the upper part of the lead screw 47 in parallel with the axis of the lead screw 47 (see also FIGS. 4 to 6).

A pair of front and rear bearings 56 are slidably fitted to the guide rail 55. As shown in FIGS. 4 to 6, a mounting bracket 57 is fixed to the upper portion of the bearing 56 on the rear side of the pair of front and rear bearings 56, and the tip of the lead screw 47 is connected to the mounting bracket 57. I have. Further, a load cell 58 as a load detecting means is fixed to the mount bracket 57. At the front side of the load cell 58, a mounting plate 59 is provided.

The mounting plate 59 is fixedly supported on the front side of a pair of support shafts 61 provided on the mount bracket 57, as shown in FIG. The pair of support shafts 61 are slidably fitted to a pair of bushes 60 provided on the mount bracket 57, respectively. The pair of bushes 60 are disposed in through holes 57 ′ formed on both sides of the axis of the lead screw 47 connected to the mount bracket 57.

Further, an actuator 63 is fixed to the mounting plate 59, and a rear end face of the actuator 63 is provided so as to be able to contact the load cell 58. As shown in FIG. 5, a flange 61 'is provided at the rear side of each of the pair of support shafts 61, and a compression spring 62 is interposed between the flange 61' and the pair of bushes 60. ing. The compression spring 62 constantly urges the pair of support shafts 61 rearward (toward the casing 46).

Therefore, the actuator 63 whose rear end face is fixed to the mounting plate 59 so as to be able to contact the load cell 58 is configured such that the rear end face always contacts the load cell 58 by the elastic force of the pair of compression springs 62. Has become.

As shown in FIGS. 4 and 5, a connecting member 64 is provided at the front of the actuator 63 through a collar 65.
Are fixed and connected. As shown in FIG. 4, a large-diameter connection hole 64a is formed in the rear side of the connection member 64, and a small-diameter connection hole 64b is formed in the front side. The small diameter connection hole 64b and the large diameter connection hole 64a communicate with each other.

The front end of the actuator 63 is formed with a small-diameter portion 63 '. Therefore, the actuator 63 and the connecting member 64 are connected by inserting the tip small-diameter portion 63 ′ of the actuator 63 into the large-diameter connecting hole 64 a of the connecting member 64.

Further, as shown in FIGS. 4 and 5, a press-fit shaft 66 disposed coaxially with the lead screw 47 is fixedly supported by the connecting member 64. The press-fit shaft 66 is fixedly supported by the connecting member 64 such that the rear side thereof is inserted through the small-diameter connecting hole 64b of the connecting member 64 and projects into the large-diameter connecting hole 64a (FIG. 4).
reference). Therefore, the press-fit shaft 66 is mounted on the rear side of the pair of front and rear bearings 56 via the load cell 58 on one side of the press-fitting device 45 (see FIG. 5).

As shown in FIG. 4, an adjusting plate 67 is interposed between the small-diameter portion 63 'of the actuator 63 and the press-fit shaft 66 in the large-diameter coupling hole 64a of the coupling member 64. I have. The adjusting plate 67 adjusts the position of the tip of the press-fit shaft 66.

As shown in FIGS. 4 to 6, a mount bracket 68 is also fixed to the upper part of the bearing 56 on the front side of the pair of bearings 56. A guide holder support member 69 is fixed to the mount bracket 68. A guide holder 70 having a guide hole 70 ′ (see FIG. 4) coaxial with the lead screw 47 is fixed to the guide holder support member 69.
The guide holder support member 69 and the guide holder 70 include:
The steel ball supply hole 71 reaching the guide hole 70 'of the guide holder 70 is communicated.

Then, as shown in FIG. 4 and FIG.
W1 (see FIG. 6) passes through the steel ball supply hole 71, and is
When the press-fit shaft 66 is supplied to the guide hole 70 ′, the press-fit shaft 66 is positioned so that the tip of the press-fit shaft 66 is located immediately behind the steel ball W1.
70 'is slidably fitted.

As shown in FIGS. 4 to 6, a stopper 72 as a press-fitting backup means is fixed to the mount bracket 68. The stoppers 72 are disposed in a pair on the left and right with the press-fit shaft 66 interposed therebetween.

The pair of stoppers 72 are connected to one side of the press-in device 45.
When the press-fitting shaft 66 press-fits the steel ball W1 into the left end Wa of the press-fitted object W, the other press-fitting device 45 abuts the connecting member 64 of the rear bearing 56 of the pair of front and rear bearings 56,
The press-fitted object W is held so as not to return. That is, the press-fitted object W is backed up and held by the lead screw 47. At this time, the guide holder 70 on the other side is already in contact with the right end Wb of the press-fitted object W.

The pair of front and rear mount brackets 57 and 68 on one side are connected by a connection shaft 73 as shown in FIGS. Connecting shaft 73
Is a connection hole 57A having a front side fixed to the mount bracket 68 and a rear side formed in the mount bracket 57 (see FIG. 4).
And is locked to the mount bracket 57 by a stopper 74 provided on the rear side of the connecting shaft 73.

A compression spring 75 is provided between the mount bracket 57 and the mount bracket 68 so as to surround the connecting shaft 73 and serve as a resilient urging means. The front side of the compression spring 75 is in contact with the mount bracket 68, and the rear side is engaged with a recess formed in the mount bracket 57. The compression spring 75 is mounted on the mounting bracket 57 and the mounting bracket 68.
Is constantly urged away. Therefore,
The pair of front and rear bearings 56 are connected so as to be able to approach and separate from each other, and are always urged in a direction in which they are separated from each other.

In the right place of the front mounting bracket 68,
As shown in FIG. 5, a pair of photoelectric tubes 76 is mounted.
As shown in FIG. 4, the pair of photoelectric tubes 76 are formed in the guide holder support member 69 and the guide holder 70 by penetrating the intersection of the guide hole 70 'and the steel ball supply hole 71, not shown. The steel ball W1 is inserted into the guide hole 70 'of the guide holder 70 through the photoelectric hole.
Is supplied. 4 to 6
In the figure, reference numerals 77 and 78 denote stoppers for a pair of bearings 56 provided at both ends of the guide rail 55.

Next, the leak test section 42 will be described mainly with reference to FIGS. The leak test unit 42 is provided with a pair of leak test devices 79. A pair of leak test devices 79
It is arranged above the pair of press-fitting devices 45. Since the pair of leak test devices 79 have the same structure, the leak test device 79 on one side (the left side in FIG. 1) will be described similarly to the press-fit device 45.

A masking cylinder 80 is fixed to a bracket 81 fixed to the main body frame 40 'of the press-fitting device main body 40 (see FIG. 6). A connecting plate 82 is fixed to the piston rod 80 'of the masking cylinder 80, and a one-touch holder 83 is mounted on the front side of the connecting plate 82 coaxially with the piston rod 80'. A slider 84 is mounted on the one-touch holder 83, and the slider 84 is constantly urged forward by a compression spring 85.

A masking holder 86 is mounted on the one-touch holder 83, and a masking rubber 87 is mounted on the front of the masking holder 86. Inside the masking rubber 87, a compressed air supply hole 88 connected to a compressed air supply source (not shown) is formed.

When replacing the masking holder 86, the slider 84 of the one-touch holder 83 is pushed back to the rear side against the elastic force of the compression spring 85, and the attached masking holder 86 is replaced.
May be removed from the one-touch holder 83, another masking holder 86 may be inserted into the one-touch holder 83, and the slider 84 may be moved to the front side by the elastic force of the compression spring 85.

A guide holder 89 is fixed to a bracket 81 fixed to the main body frame 40 '.
A guide shaft 90 having a front end fixed to the connecting plate 82 is slidably fitted to 89. As shown in FIG. 1, a leak tester 91 is provided at an appropriate position on the main body frame 40 '.

Next, the lifting section 43 will be described mainly with reference to FIGS. The elevating unit 43 is provided with an elevating device 92. The elevating device 92 is disposed at a substantially intermediate position between the pair of press-in devices 45. That is, the jig mounting plate 93 of the elevating device 92 is disposed at a substantially intermediate position between the pair of press-fitting devices 45, and the jig mounting plate 93 is connected to and supported by the piston rod 94 'of the elevating cylinder 94. . The lifting cylinder
94 is fixed to the body frame 40 'of the press-fitting device body 40.

A pair of guide holders 95 are fixed to the body frame 40 'on both sides of the elevating cylinder 94, and a guide shaft 96 is slidably fitted to the pair of guide holders 95. The distal end of the guide shaft 96 is fixed to the jig mounting plate 93, and a stopper 97 is attached to the base end.

The jig mounting plate 93 has a jig for mounting a press-fitted object.
98 is placed (see FIG. 1). The press-fitted object mounting jigs 98 are provided by the number of types of the press-fitted objects W. When the press-fitted object W is mounted on the press-fitted object mounting jig 98 and placed on the jig mounting plate 93, the press-fitted object W is positioned at the press-fitting position, and the identification means (not shown) provided on the jig mounting plate 93. Thus, the type of the press-fitted object W is identified.

A pair of cylinders 99 with guide rails fixed to the body frame 40 'are provided above the elevating device 92. A substantially V-shaped pressing member 100 having an opening directed downward is provided on the piston rod of the cylinder 99 with a guide rail.
Is installed. Also, cylinder 99 with guide rail
Is for detecting the mounting posture of the press-fitted object W mounted on the jig mounting plate 98 on the jig mounting plate 93.

Next, the press-fit component supply section 44 will be described mainly with reference to FIGS. 1, 2 and 3. A press-fit component supply device 101 of a press-fit component supply unit 44 is provided above the press-fit device main body 40. The steel ball stocker 32 of the press-fitting part supply device 101
Supply pipe 32 'at the bottom of steel ball stocker 32 to main frame 40'
(See FIGS. 1 and 2). The number of the steel ball stockers 32 is equal to the number of types of the press-fitted objects W, each of which is a pair of press-fitting devices.
Forty-five press fitting devices (see FIG. 2) are provided separately.

A shift cylinder 103 is attached to the base end of the steel ball separator 102. Also steel ball separator
A connecting pipe 105 is fixed to the shift port of 102, and a pair of supply chutes 104 inclined downward toward the center are fixedly supported at the lower part of the steel ball stocker 32 group. ing.

One of the pair of supply chutes 104 is connected to the guide holder support member 69 of the press-in device 45 on one side and the guide holder.
A supply hose 33 is inserted into a steel ball supply hole 71 (see FIG. 4) drilled in 70.
(See FIG. 2) and a pair of supply chutes 1
The other one of 04 is in communication with a guide holder support member 69 of the other press-fitting device 45 and a steel ball supply hole 71 formed in the guide holder 70 via a supply hose 33. Therefore, the press-fit component supplying means for supplying the steel ball W1 as a press-fit component to the guide hole 70 'of the guide holder 70 includes the steel ball stocker 32, the steel ball separator 102, the supply chute 104, the supply hose 33, and the steel ball supply hole 71. It is schematically constituted by

Next, the operation of the embodiment of the present invention will be described. First, all devices are in their original positions and the steel ball stocker 32
Each group contains steel balls W1 corresponding to the type of the press-fitted object W. The press-fitted object mounting jig 98 to which the press-fitted object W is mounted is placed on the jig mounting plate 93 of the elevating device 92, and the press-fitting device main body 40 is started. Thus, the steel ball W1 is press-fitted into the left end Wa and the right end Wb of the article W to be pressed in FIG. In the present embodiment, the steel ball W1 is first press-fitted into the left end Wa of the press-fitted object W. At this time, the right end Wb of the press-fitted object W is pressed by the guide holder 70 of the press-fitting device 45 on the other side to back up, so that the press-fitted object W does not move rightward.

When the press-fitting device main body 40 is activated, the type of the press-fitted object W is identified by identification means (not shown) provided on the jig mounting plate 93, and an identification signal is transmitted to the control device 34 (see FIG. 3). , A pair of guide rail cylinders 99 is operated to extend the piston rod and a pair of holding members.
100, the posture is detected by pressing the press-fitted object W, and a detection signal is transmitted to the control device 34.

When the control device 34 receives the identification signal and the detection signal, if the detection signal is a good signal, the press-fitted object W is detected.
Is correctly positioned at the press-fitting position of the press-fitting portion 41, the press-fitting material W is selected from the group of steel ball stockers 32 of the press-fitting component supply unit 44 on the side of the press-fitting material W that is to be press-fitted first. Ball stocker 32 containing steel balls W1 corresponding to the types of
The shift cylinder 103 is operated, and its piston rod is extended.

The steel ball separator 102 is provided with a guide groove for exactly one steel ball W1. This guide groove communicates with the supply pipe 32 'of the steel ball stocker 32. When the piston rod extends, one steel ball
Only W1 is pushed, passes through the connecting pipe 105, and falls by its own weight into the supply chute 104 of the pair of supply chutes 104 on which the steel ball W1 is first pressed into the press-fitted object W. It is supplied to the guide hole 70 'of the guide holder 70 through the supply hole 71.

On the other hand, the number of pulses corresponding to the press-in backup movement of the lead screw 47 is set in the control device 34 in advance for each type of the press-fitted object W, and the control device 34 receives the identification signal and the detection signal. If the detection signal is a good signal, it is recognized that the press-fitted object W is correctly positioned at the press-fitting position of the press-fitting portion 41.
The number of press-fitting backup pulses is transmitted to back up the right end Wb of the press-fitted object W in FIG. 1 of the pair of press-fitting devices 45, and the servomotor 52 of the other press-fitting device 45 is operated to correct the rotation drive shaft. Invert.

When the rotary drive shaft of the servo motor 52 of the press-fitting device 45 on the other side rotates forward in this manner, this rotation is caused by one of the gear of the rotary drive shaft of the servo motor 52 on the backup side and the other of the gear box 53. A pair of gear and nut holder
The ball nut 47 'is transmitted to the gear 49 and rotates together with the nut holder 49. When the ball nut 47 'rotates, the lead screw 47 screwed to the ball nut 47' is rotated because its tip is connected to the rear bearing 56 of the pair of bearings 56 of the press-fitting device 45. Move forward without

When the lead screw 47 on the other side moves forward, it pushes the rear bearing 56 of the pair of bearings 56. When the rear bearing 56 is pressed, the front bearing 56 is resiliently pressed by the compression spring 75. Because it is biased, the front bearing is also pressed. That is, when the lead screw 47 advances, the pair of bearings 56 advance on the guide rail 55.

When the pair of bearings 56 advance on the guide rail 55, the guide holder 70 comes into contact with the press-fitted object W, and the advance of the bearing 56 on the front side of the pair of bearings 56 stops. However, the servo motor 52 on the backup side
Since it is still operating, the rear bearing 56 of the pair of bearings 56 moves forward against the elastic force of the compression spring 75, and moves the lead screw 47 to a predetermined press-fit backup position.

At this time, the press-fitting shaft 66 connected to the lead screw 47 via the load cell 58 penetrates into the through hole W 'of the press-fitted object W, and the connecting member 64 substantially abuts the pair of stoppers 72. It will be in a state of having done.

When the lead screw 47 moves to the predetermined press-fit backup position in this way, the controller 34
Since the number of pulses corresponding to the amount of press-in movement of the lead screw 47 is set in advance for each type, the control device 34 transmits the number of press-in pulses in response to the identification signal, and the pair of press-in devices 45 The servo motor of the press-in device 45 on the side on which the steel ball W1 is pressed into the press-in object W, that is, in FIG.
Actuate 52 to rotate its rotary drive shaft forward.

When the rotary drive shaft of the servo motor 52 on the side into which the steel ball W1 is press-fitted rotates forward, the lead screw 47 moves forward,
The pair of bearings 56 advance on the guide rail 55, and the guide holder 70 comes into contact with the press-fitted object W, and the pair of bearings 56
Of the bearing 56 on the front side of the vehicle stops.

However, since the servomotor 52 for press-fitting the steel ball W1 is still operating, the rear bearing 56 of the pair of bearings 56 moves forward against the elastic force of the compression spring 75, and The screw 47 is moved to a predetermined press-fitting position.

At this time, the press-fitting shaft 66 connected to the connecting member 64 via the lead screw 47 and the load cell 58 is attached to the guide holder 70.
While pushing the steel ball W1 supplied to the guide hole 70 ', the steel ball W1 penetrates into the through hole W' of the object to be pressed W, and the steel ball W1 is pressed into a predetermined position of the through hole W '. On the other hand, the connecting screw 64 of the lead screw 47 on the backup side abuts against the pair of stoppers 72 to reliably back up the press-fitting.

A predetermined press-in range is set in the load cell 58. For example, when the diameter of the through-hole W 'of the press-fitted object W is larger than the diameter of the steel ball W1, the press-in force is small. Therefore, the load cell 58 detects this as a low load, causes a press-fit error, and stops the apparatus.

On the contrary, when the diameter of the through-hole W 'of the object to be pressed-in W is smaller than the diameter of the steel ball W1, the press-in force increases, and the load cell 58 detects this as a high load.
Similarly, the apparatus is stopped as a press-fit error.

In this manner, the left end Wa of the press-fitted object W is obtained.
When the press-fitting of the steel ball W1 into the
The steel ball W1 is press-fitted at the press-fitting position and then stopped and waited, and then the steel ball W1 is press-fitted into the backed-up side of the press-fitted material W (the side to be press-fitted later), that is, the right end Wb side of the press-fitted material W. Therefore, the rotation drive shaft of the servo motor 52 is reversed, and the lead screw 47 on the backup side is retracted to the original position.

When the lead screw 47 is retracted to the original position, the steel ball stocker 32 in which the steel ball W1 corresponding to the type of the object W to be pressed is stored among the steel ball stockers 32 on the side to be press-fitted later. The shift cylinder 103 operates, and its piston rod extends to push the steel ball W1 in the steel ball separator 102. As a result, the steel ball W1 passes through the connecting pipe 105,
Later, it falls by its own weight on the supply chute on the side to be pressed in, and is supplied to the guide hole 70 ′ of the guide holder 70 through the supply hose 33 and the steel ball supply hole 71.

When the steel ball W1 is supplied to the guide hole 70 'of the guide holder 70, the rotary drive shaft of the servomotor 52 to be press-fitted later rotates forward to advance the lead screw 47 to the press-fitting position. A steel ball W1 is press-fitted into a predetermined position of the through hole W 'of the press-fitted object W.
Of course, the lead screw 47 on the side press-fitted first has a pair of stoppers 72.
Is pressed by the connecting member 64 to reliably back up the press-fitting.

When the steel balls W1 are press-fitted from both sides into the predetermined positions of the through-holes W 'of the press-fitted object W, the rotary drive shafts of the two servomotors 52 rotate in reverse to move the lead screw 47 back to the original position, and ,
The piston rods of the pair of cylinders 99 with guide rails are shortened, and the pressing member 100 is retracted to the original position.

When the holding member 100 is retracted to the original position, the lifting cylinder 94 of the lifting device 92 operates to move its piston rod.
94 'is extended, the jig mounting plate 93 is raised, and the press-fitted object W after press-fitting is raised to the leak test position of the pair of leak test devices 79 of the leak test section 42 shown in FIGS.

After the press-fitting object W is pressed into a pair of leak test devices,
When raised to the leak test position 79, the piston rods of the pair of cylinders 99 with guide rails extend and
Is lowered, the object to be pressed-in W is pressed, the posture of the object to be pressed-in W is detected, and a detection signal is transmitted to the control device.

When the control device 34 receives the detection signal, if the detection signal is a good signal, the press-fitted object W is detected by the leak test section.
Since it is confirmed that they are correctly positioned at the leak test position of 42, the masking cylinder 80 of the pair of leak test devices 79 operates to extend the piston rod 80 ', and the press-fitted object W after press-fitting is removed. Mask airtight with masking rubber 87 from both sides.

Then, compressed air is supplied from a compressed air supply source (not shown) through the compressed air supply holes 88 to the steel ball press-fitting portions on both sides of the press-fitted object W after the steel ball press-fitting, and the leakage tester 91 (FIG. 1)
), A leak test is performed simultaneously on both sides of the press-fitted object W after the steel ball is press-fitted. That is, the quality of the steel ball press-fit portions on both sides of the press-fitted object W after the press-fit is determined by the leak tester 91.

In this embodiment, the leak test of the steel ball press-fit portions on both sides of the press-fitted object W after the press-fit is performed at the same time. However, the leak test is performed one by one by switching the pneumatic circuit with a valve. You may.

When the leak test of the press-fitted object W is completed, the supply of the compressed air from the compressed air supply source (not shown) is stopped.
The masking cylinder 80 shortens its piston rod 80 ', releases the masking by the masking rubber 87 from both sides of the press-fitted object W after the leak test, and shortens the piston rods of the pair of cylinders 99 with guide rails to hold down. Member 100
Is raised to return to the original position, the piston rod 94 'of the lifting cylinder 94 is shortened, and the jig mounting plate 93 is lowered to return to the original position.

That is, the press-fitted object W after the leak test descends to the original mounting position. Then, the press-fitted object W after the press-fitting is removed from the press-fitting device main body 40, and one cycle is completed.

[0112]

According to the first aspect of the present invention, the press-fitting shaft is connected to the lead screw and the lead screw is controlled by the servomotor. Different types of objects can be processed at the station, and the press-in device can be generalized.
The entire press-fitting device can be downsized.

Since the entire press-fitting device is downsized, the installation area can be reduced and the manufacturing cost can be reduced.

Since the press-fitting shaft is connected to the lead screw and the lead screw is controlled by the servomotor, even if the press-fitting parts (steel balls) having different press-fittings are used, the press-fitting object is Even if the press-fitting varies depending on the size of the press-fitting parts to be press-fitted into the, the optimum press-fitting value can be easily set only by changing the current value of the servomotor.

The press-fit shaft is connected to the lead screw, and the lead screw for moving the press-fit shaft forward and backward is controlled by a servomotor. In the press-fitting process, the press-fitting process is performed like a conventional press-fitting device. Press-fitting stations are provided by the number of types, and press-fitting and backup means are provided at each press-fitting station, and these press-fitting and backup means are connected to a hydraulic unit via a hydraulic pipe provided with a pressure reducing valve, a solenoid valve, and the like. Since there is no need to provide a system, the entire press-fitting device is small and simple, the installation area is small, the manufacturing cost of the press-fitting device is low, the structure is simple, and the maintenance work is extremely easy. Can be.

[Brief description of the drawings]

FIG. 1 is a front view of a press-fitting device main body showing an example of an embodiment of the present invention.

FIG. 2 is a right side view of the one shown in FIG.

FIG. 3 is a plan view of what is shown in FIG.

FIG. 4 is an enlarged front view of one of the press-fitting devices shown in FIG.

FIG. 5 is a plan view of what is shown in FIG.

FIG. 6 is an enlarged front view of one side of the leak test apparatus and the press-fitting apparatus shown in FIG.

FIG. 7 is a front view of a conventional press-fitting device.

FIG. 8 is a top view of what is shown in FIG.

9 is a partially enlarged front view of the press-fit unit shown in FIG.

[Explanation of symbols]

 40 Press-in device body 41 Main frame 45 Press-in device 46 Casing 47 Lead screw 47 'Ball nut 52 Servo motor 53 Gear box 55 Guide rail 56 Bearing 58 Load cell 66 Press-fit shaft 70 Guide holder 70' Guide hole 72 Stopper 75 Compression spring 79 Leakage Test equipment 92 Elevating equipment 101 Press-fit parts supply equipment W Workpieces W1 Steel balls

Claims (1)

[Claims] 1. A pair of press-fitting devices for press-fitting a press-fitting component into an object to be press-fitted, wherein casings are provided on both sides of a main body frame of a press-fitting device main body of the press-fitting device, and ball nuts are respectively rotated on the pair of casings. The ball nut is rotatably screwed with the lead screw, and the ball nut and the servomotor are connected via a rotation drive means. The lead screw is inserted between the pair of casings. And the two guide rails in a straight line so that the axis is parallel to the
A pair of bearings are slidably fitted to the two guide rails, respectively, and the two guide rails are provided with a pair of bearings. The lead screw is connected to each of the bearings located on the side, and a press-fit shaft extending toward the front side is mounted via a load detecting means, and the press-fitting shaft is located on the front side in the forward direction of the pair of bearings. A guide holder provided with a guide hole in which the press-fit shaft is slidably fitted in the bearing is fixedly supported, and when the press-fit shaft press-fits a press-fit component into the press-fit, the press-fit is press-fitted. A press-fitting backup means for abutting and holding the opposite side of the side, and a resilient biasing means for constantly resiliently biasing the pair of bearings in the separating direction between the bearings; each A press-fit component supply means for mounting and supplying press-fit components to respective guide holes of the guide holder is provided, and a press-fitted object after press-fit is masked above the pair of press-fit devices, and the press-fit component is press-fitted. A pair of leak test devices for supplying a compressed air to the section and performing a leak test are disposed facing each other, and are disposed between the pair of press-fitting devices to place and position the object to be pressed and A general-purpose press-fitting device, further comprising a lifting device for raising and lowering the press-fitted material between the pair of press-fitting devices and the pair of leak test devices.