JPS6246549Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a driving device for driving a ball into a hole in an object.

Prior Art In conventional driving devices, the operator inserts the ball between the tip of the driving tool and the hole in the target object, and then drives the ball by applying an impact force to the rear end of the tool. . However, in this case, only one ball can be attached to the tip of the tool at a time, making it cumbersome to attach a ball each time the tool is driven. If this is the case, it cannot be grasped well with fingers, so it must be pinched with tweezers or the like and attached to the tip of the tool, which has the disadvantage of poor workability and lack of reliability. Furthermore, in order to prevent the ball from falling once it has been installed, it is necessary to magnetize the tip of the tool, apply grease, etc., and this also makes the ball driving operation troublesome and time-consuming.

Purpose of the invention In view of the above-mentioned circumstances, the present invention was created with the aim of providing a device that can easily and reliably feed balls and perform driving operations efficiently. It is.

Structure of the invention In order to achieve this object, the driving device according to the invention includes (a) a punch hole having an inner diameter slightly larger than the diameter of the ball, and a line from the punch hole that intersects with the center line of the punch hole. (b) a case having a ball supply hole extending along the ball and having an inner diameter slightly larger than the diameter of the ball; A punch whose tip pushes out the ball in the punch hole from the outlet of the punch hole and drives it into the hole of the object by applying force; (d) a stopper that prevents the ball from retracting beyond a position that just allows the ball to be supplied from the punch hole to the punch hole; A state in which only one ball is allowed to be supplied from the ball supply hole between the tip of the punch and the tip of the punch by always protruding from the inner surface of the punch hole and preventing the ball from moving toward the exit side. However, it is configured to include a ball restraining mechanism that allows the ball to move toward the exit side when a protruding force of a certain level or more is applied to the ball by the tip of the punch.

In addition, here, the position where the tip of the punch just allows balls to be supplied from the ball supply hole to the punch hole means that the tip of the punch is located between the ball prevention mechanism and the ball prevention mechanism. A position separated by a distance that allows only the ball to enter.

Effects of the invention In the driving device configured as above,
Balls are automatically supplied one by one from the ball supply hole, so if multiple balls are placed in this supply hole in advance, the operator can attach the balls to the tip of the tool each time the tool is driven. There is no need to
Driving work can be performed continuously and efficiently.
In addition, by supplying balls through the supply hole in this way, even small-diameter balls can be reliably supplied into the punch hole without using tweezers, etc., and the tip of the tool can be used to prevent balls from falling. Since there is no need to apply grease to the parts, the ball driving operation can be carried out efficiently and reliably from this point of view as well.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

In Figure 1, 10 is a case, case 1
A punch hole 12 is formed in the center of 0 and passes through it in the axial direction. The part of the punch hole 12 on the case tip side is a small diameter hole 14, and the inner diameter of this small diameter hole 14 is slightly larger than the diameter of the ball to be punched into the hole of the object.
Further, a portion forming the side wall of the small diameter hole portion 14 of the case 10 has a portion that intersects with the center line of the punch hole 12 and
A through hole 16 is formed whose center line is a line inclined toward the rear end of the case 10. Through hole 16
The inner diameter of the portion of the side communicating with the small diameter hole 14 is made equal to the inner diameter of the small diameter hole 14;
The inner diameter of the outer peripheral side of the case is made slightly larger than that, and a pipe 18 having an inner diameter equal to the inner diameter of the small diameter hole 14 is fitted into this part, thereby communicating with the punch hole 12. A ball supply hole 20 is formed. Furthermore, a notch 2 is provided in a portion adjacent to the through hole 16 on the front end side of the case.
2 is provided so that the punch hole 12 can be seen from the outer peripheral side of the case 10.

A stepped punch 24 is slidably fitted into the punch hole 12. That is, punch 2
4 has a longitudinal shape, and includes a small diameter portion 26 having a diameter slightly smaller than the small diameter hole portion 14 of the punch hole 12 and a large diameter portion 30 having a diameter slightly smaller than the large diameter hole portion 28 of the punch hole 12. The small diameter portion 26 is fitted into the small diameter hole portion 14 so as to be guided and slid therein. The forward movement of the punch 24, that is, the sliding movement toward the opening (outlet) side of the small diameter hole 14 of the punch hole 12, is regulated by the shoulder surface 32 of the large diameter portion 30 coming into contact with the stepped surface 34 of the punch hole 12. However, the small diameter portion 26 is
The length is such that the ball can be driven to a predetermined depth when the ball is at its forward end position. That is, in the driving device of this embodiment, the stepped surface 3
The driving depth of the ball can be determined by appropriately selecting the formation position of the small diameter portion 4 and the length of the small diameter portion 26.

On the other hand, a groove 36 extending in the axial direction is formed on the outer peripheral surface of the large diameter portion 30 of the punch 24, and a pin 38 press-fitted into the rear end side of the case 10 is inserted into the groove 36.
By being fitted into the pin 38, relative rotation between the case 10 and the punch 24 is prevented.
The punch 24 is allowed to slide by sliding within the groove 36, but the pin 38 engages with the end surface of the groove 36 on the small diameter portion 26 side, so that the punch 24 reaches its retraction limit, that is, the punch 24 is allowed to slide within the groove 36. A limit of movement in the direction of exiting from the hole 12 is defined, and the tip is prevented from retreating beyond a position slightly retreating from the position where the through hole 16 intersects with the punch hole 12. This position will be referred to as the retracted position of the punch 24, and the groove 36 and pin 3
8 are formed and press-fitted at appropriate positions so that the retraction limit of the punch 24 is defined as described above, and the groove 36 is formed so that the punch 24 can move between this retracted position and the forward end position described above. It is formed in such a length that it can slide between them.

Further, the large diameter portion 30 of the punch 24 has a shoulder portion 32.
Two flanges 40 and 42 are formed at positions separated by a distance corresponding to the depth of the large diameter hole 28 of the punch hole 12 with a slight gap between them. The other end of a spring 44, one end of which is wound around the rear end side of the case 10, is locked between these flanges 40, 42. However, as described above, the end face of the groove 36 on the small diameter portion 26 side engages with the pin 38, so it does not come out of the punch hole 12 and is always stopped at the retreated position. It is kept in a safe condition.

Furthermore, the punch hole 12 of the punch 24 is connected to the through hole 1.
A female threaded hole 46 passing through the case 10 in the radial direction is formed on the exit side of the punch hole 12 from the position where it intersects with the hole 6, and a cup-shaped threaded member 48 is screwed into this female threaded hole 46. There is. A spring 50 and a ball 52 are housed inside the screw member 48, and the ball 52 is urged by the spring 50 in a direction to protrude from the screw member 48, and the opening periphery of the screw member 48 is caulked. This prevents it from falling off,
It is always in a state where it is made to protrude from the inner surface of the punch hole 12.

When driving a ball with the driving device configured as described above, the punch 24 is attached to the air hammer, and while the air hammer is supported so that the pipe 18 of the driving device is positioned above, the punch 24 is inserted from the pipe 18 side. When the ball 54 is inserted, the ball 54 passes through the pipe 18 and falls into the punch hole 12, but at this time, the ball 52 housed in the screw member 48 protrudes into the punch hole 12. , Also, since the punch 24 is in the retracted position,
The ball 54 that fell into the punch hole 12 is the ball 5.
2 and the punch 24, and is held immovably over a limited short distance.
The ball 5 that is subsequently inserted after closing the opening of 6
4 from entering into the punch hole 12. As a result, although a plurality of balls 54 can be inserted into the pipe 18 at once, the punch hole 1
2 will be supplied one by one.

After inserting the ball 54 in this manner, the air hammer is advanced to press the tip of the case 10 against the object 56 while aligning the opening of the punch hole 12 with the opening of the hole 58 provided in the object 56. Then, when the operator applies force to the punch 24 through the air hammer to move it forward, the ball 54 overcomes the urging force of the spring 50 and is ejected, and furthermore, a part of the ball 54 is pushed out from the hole 58. When the punch 24 is advanced until it is inserted into the case 10, the engagement between the ball 54 and the hole 58 causes the case 10 to be positioned so that the punch hole 12 and the hole 58 are located on the same axis. Positioned. Therefore, if an impact force is applied to the rear end of the punch 24 using an air hammer in this state, the ball 54 will be driven into the hole 58 to a predetermined depth as shown in FIG. In this case, the punch hole 12
Even if the ball 54 supplied inside the pipe is pushed out, the opening of the through hole 16 on the punch hole 12 side is closed by the small diameter portion 26, so that the ball 54 inside the pipe 18 is pushed out from the punch hole 12. There is no going inside.

After hitting the ball 54 as described above,
When the force applied to the punch 24 via the air hammer is removed, the punch 24 is urged by the spring 44 and pushed back to the retracted position. is in communication with the punch hole 12 again, and the ball 54 in the pipe 18 is connected to the punch hole 12.
The driving device is then ready for the next driving operation.

In this way, in the driving device of this embodiment, the balls put into the pipe 18 are automatically supplied to the punch hole 12 one by one, so it is possible to insert a plurality of balls 54 into the pipe in advance. If the ball is placed within 18, the driving work can be performed continuously: This allows the driving work to be performed more efficiently than when the operator attaches a ball to the tip of the tool each time. It is. Furthermore, even if the ball 54 has a small diameter, it can be easily done by just putting it into the pipe 18, and the ball can be supplied reliably. Since there is no need to take measures to prevent falling, work efficiency is also improved from this point of view.

Another embodiment of the invention is shown in FIGS. 3-5. In the driving device of this embodiment, as shown by the solid line in FIG. The ball 54 is held back from the opening by a distance slightly shorter than the diameter of the ball 54 to be hit. This position of the punch 24 will be referred to as the neutral position. In this embodiment, when the punch 24 is in the neutral position, the spring 44 is in a state where it does not apply force in any direction, and the punch 24 is moved. The punch 24 is held at the neutral position, and in order to reliably position the punch 24 at the neutral position, the following positioning mechanism is provided.

That is, on the outer peripheral surface of the large diameter portion 30 of the punch 24, there is a notch with a V-shaped cross section that is located on the opposite side of the groove 36 across the axis of the punch 24 and extends perpendicularly to the axis of the punch 24. 60 is formed,
On the other hand, on the rear end side of the case 10, as clearly shown in FIG. slot 62 and case 10
A circumferential groove 64 is formed which opens on the outer circumferential side of the groove and which connects to the slot 62. and,
When the case 10 and the punch 24 are aligned so that the notch 60 and the slot 62 are linearly connected, a ring-shaped spring 6 is inserted along the bottom surfaces of the notch 60, the slot 62, and the groove 64.
6 is wrapped around it. That is, the spring 66 is attached to the case 10 so as not to be movable in a direction parallel to the axis, and the straight portion is elastically engaged with the notch 60 of the punch 24, thereby holding the punch 24 in the neutral position. -ing

In addition, a notch 2 is provided on the outer peripheral surface of the distal end side of the case 10.
2, a circumferential notch 68 is formed, and a ring-shaped spring 70 is disposed within this notch 68. This spring 70
As shown in FIG. 5, the portion located within the notch 22 is recessed toward the center of the case 10 so as to fit into the punch hole 12.

When the balls 54 are supplied to the punch hole 12, a plurality of balls 54 are placed in the ball supply hole 20 in advance. When the punch 24 is pushed forward, that is, in the direction in which the punch 24 comes out of the punch hole 12, until it engages with the Since the ball 54 is moved to the retracted position shown, the ball supply hole 20 is opened and the ball 54 is dropped into the punch hole 12. At this time, only one ball 54 is supplied into the punch hole 12 because it is restrained by the ball 52 and the tip of the punch 24, and when the operator loosens the force applied to the case 10, the case 10 springs. 44, the punch 24 returns to the neutral position while pushing the ball 54 forward. At this time, since a spring 70 that enters the punch hole 12 is fitted to the tip of the case 10, the ball 54 will not come out of the punch hole 12.
It is stopped with a part of it protruding from the tip of the case 10. Therefore, when positioning the driving device with respect to the object 56, the hole 58 provided in the object 56 and the punch hole 12 are
It is only necessary to align the protruding portion of the ball 54 so that it fits into the opening of the hole 58, and positioning can be easily and reliably performed. After positioning in this way, if an impact force is applied to the rear end of the punch 24 using an air hammer, the ball 54 is pushed out while deforming the spring 66 outward in the radial direction, and is driven into the hole 58. ,
After the driving is completed, if the force applied to the punch 24 via the air hammer is removed, the punch 24 will be pushed back to the neutral position by the spring 44.

In this embodiment, one end of the vinyl hose 72 is placed over the end of the pipe 18 on the opposite side from the side fitted into the through hole 16, and the ball 5
4 is supplied through this vinyl hose 72 from a ball supply device (not shown). Further, a notch 74 extending in the axial direction is formed in the side surface of the pipe 18 on the case tip side, and the feeding status of the balls 54 can be observed through this notch 74.

Since the other configurations, operations, and effects are the same as those of the previous embodiment, the same reference numerals are given to the parts that perform the same operations, and detailed description thereof will be omitted.

In the embodiment shown in FIGS. 3 to 5, the notch 22 is omitted to shorten the case 10, and a female screw hole 4 is provided at the position where the screw member 48 is screwed.
A notch 68 may be provided in place of the hole 6 and a spring 70 may be fitted therein so that the balls 54 are supplied one by one into the punch hole 12 by the action of the spring 70 to prevent movement of the balls. High machining accuracy, 44 springs
Punch 2 when is not elastically deformed.
If it is possible to ensure that the punch 24 is always in the neutral position, the positioning mechanism for positioning the punch 24 in the neutral position can be omitted.

Further, in the above two embodiments, the spring 44 can be omitted if the operator performs all operations of the case 10 and the punch 24 by hand, except for driving the ball 54 with an air hammer. However, if the spring 44 is omitted in the embodiment shown in FIGS. 3 to 5,
It is necessary to provide a positioning mechanism for positioning the punch 24 at a neutral position.

Furthermore, in the above two embodiments, the punch hole 12
The supply hole for supplying balls to the ball was constructed by a pipe fitted into the case 10; You can.

Furthermore, in the driving devices of the above two embodiments, the driving depth of the ball 54 was determined by appropriately selecting the amount of advance of the punch 24 and the length of the small diameter portion 26. In cases where the hole into which the ball is to be driven is a stepped hole and the driving depth is determined by the ball coming into contact with the stepped surface of the hole, there is no need for a means to restrict the forward movement of the punch 24, and the punch 24 It is possible to have a simple shape without a step. Further, when the operator adjusts the driving depth while checking the driving condition, the above-mentioned regulating means is not necessary.

Furthermore, the case 10 and the punch hole 12
The worker may manually prevent the rotation relative to the main body.

In addition, although I will not give any examples, it is understood that the present invention can be implemented in various modifications and improvements based on the knowledge of those skilled in the art without departing from the scope of the claims for utility model registration. Of course.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing a driving device according to an embodiment of the present invention, and FIG. 2 is a side sectional view showing another operating state of the driving device shown in FIG.
FIG. 3 is a side cross-sectional view showing a driving device according to another embodiment of the present invention, and FIG. 4 is a cross-sectional view taken from FIG. FIG. 5 is a front view of the apparatus shown in FIG. 3. 10: Case, 12: Punch hole, 18: Pipe, 20: Ball supply hole, 24: Punch, 36:
Groove, 38: pin, 46: female threaded hole, 48: threaded member, 50, 70: spring, 52, 54: ball, 68: notch.

Claims (1)

[Claims for Utility Model Registration] A device for driving a ball into a hole in an object, comprising a punch hole having an inner diameter slightly larger than the diameter of the ball, and a line extending from the punch hole to a line intersecting the center line of the punch hole. a case including a ball supply hole extending along the ball and having an inner diameter slightly larger than the diameter of the ball; and a ball supply hole slidably fitted into the punch hole of the case to apply an impact force to the rear end. a punch whose tip pushes out the ball in the punch hole from the outlet of the punch hole and drives it into the hole of the object by being applied to the case; a stopper for preventing the ball from retracting beyond a position that just allows the ball to be supplied from the hole to the punch hole; By always protruding from the inner surface of the punch hole and preventing the ball from moving toward the exit side, it is ensured that only one ball is supplied from the ball supply hole between the ball and the tip of the punch. The invention is characterized in that it includes a ball restraining mechanism that allows the ball to move toward the exit side when a protrusion force of a certain level or more is applied to the ball by the tip of the punch. Self-contained ball driving device.