JPH0537472U - Nail supply mechanism for nailer - Google Patents

Abstract

(57) [Abstract] [Structure] Nail feed member 9 pivotally attached to the piston rod 7.
Is urged toward the entry position side of the nail supply path 3 by a spring, and the nail feeding member 9
A first stop surface 11 for engaging the outer peripheral surface of the piston rod 7 to position the feed claw 9b at the entry position in the vicinity of the pivotally attached portion, and rotation of the feed claw 9b in the retreat direction at a predetermined angle. A second stop surface 12 which is restricted to The accuracy of the stop position of the feed claw 9b is determined only by the accuracy of the first and second stop surfaces 11 and 12 formed on the nail feed member 9, but the stop surface is relatively easy to machine. Further, unlike the conventional case, a pin for setting the entry position of the feed claw 9b is not required, and the number of man-hours for assembling the pin, which requires accuracy, can be reduced, and the engagement surface is formed on the piston rod 7. Since the machining is not required and only the nail feeding member 9 which is easy to process is required, the cost can be reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a nail feeding mechanism that feeds, one by one, the connecting nails in the nail feeding path of the nailing machine to the nail injection port, and in particular, the rotation angle of the nail feeding member supported to the piston rod of the nail feeding cylinder. The present invention relates to a nail supply mechanism that regulates

[0002]

[Prior art and its problems]

 As disclosed in Japanese Utility Model Publication No. 56-12419, a nail shaft of a connecting nail which has been conventionally reciprocally driven along a nail nail supply path and whose tip has entered the nail supply path and has been loaded into the nail supply path. Nail supply mechanisms with engaging feed pawls are known. In this nail supply mechanism, the feed claw is formed at the tip of the nail feed member, the nail feed member is rotatably supported by the tip of the piston rod of the nail feed piston, and the tip of the feed claw is fed by the nail. The spring is biased by a torsion coil spring in the direction of entering the road. For this reason, the feed pawl enters the nail supply path during forward movement and engages with the internal nail to supply only one nail to the injection port that is connected to the nail supply path, but At times, it may return to the original position by turning over the nail shaft held by the check mechanism and retracting from the nail supply path.

By the way, the feed claw is formed on the pin 21 and the piston rod 22 provided on the nail feed member 20 as shown in FIG. There is provided a rotation stopping mechanism constituted by the engagement with the engaging surface 23 and the engagement between the nail feeding member 20 and the engaging surfaces 24, 25 of the piston rod.

By the way, the stop position of the feed claw 20a at the tip of the nail feed member 20, that is, the amount of the feed claw 20a into the nail supply path 26 is required to be fairly accurate. This is because if the stop position of the feed claw 20a is incorrect, the feed size of the nail will change, and reliable nail supply will not be possible. As described above, in the above-mentioned configuration, since the precision is required for processing the pin and the engaging surface of the nail feeding member and the engaging surface of the piston rod and for assembling the both, the cost increase cannot be avoided.

[0005]

[The purpose of the device]

 SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks and to provide a nail supply mechanism capable of surely supplying nails at a low cost.

[0006]

[Means for achieving the purpose]

 In order to achieve the above object, a nail supply mechanism of a nailing machine according to the present invention is a nail supply mechanism for supplying a connecting nail loaded in a nail supply path of a nailing machine to a nail injection port. A piston feed rod of a piston reciprocally housed in a nail feed cylinder provided along the supply path and a nail feed member supported at the tip of the piston rod are provided, and the nail feed member is attached to the piston rod. On the other hand, the feed claw formed at the tip of the nail feed member is rotatably pivoted between an entry position where it enters a predetermined position inside the nail supply passage and a retracted position where it is retracted outside the nail supply passage. Then, the nail feed member is spring-biased toward the entry position side, and the tip of the feed pawl is engaged with the outer peripheral surface of the piston rod in the vicinity of the pivot portion of the nail feed member so that the tip of the feed pawl is located at the entry position. First stop surface to be positioned on and the way to retract the feed claw And characterized by forming a second stop surface for limiting to a predetermined angle rotation of the.

[0007]

[Function and effect of the device]

 According to the above configuration, when the nail is supplied, the nail feed member with respect to the piston rod retracts to the entry position where the feed nail at the tip of the nail feeds into the predetermined position inside the nail supply passage and the predetermined position outside the nail supply passage. Although it rotates to the retracted position, in the rotation of the nail feeding member, the predetermined position of entry of the feeding pawl and the predetermined angle at the time of withdrawal are the outer peripheral surface of the piston rod and the first stop surface of the nail feeding member. And a second stop surface. That is, the accuracy of the stop position of the feed pawl is determined only by the processing accuracy of the first stop surface and the second stop surface formed on the nail feed member. Machining of the stop surface is relatively easy, and the required accuracy can be sufficiently satisfied. Therefore, the feed pawl can be always stopped at the correct position during rotation.

Further, unlike the conventional case, a pin for setting the entry position of the feed claw is not required, and the number of man-hours for assembling the pin, which requires accuracy, can be reduced, and an engaging surface is formed on the piston rod. Therefore, the cost can be reduced because only the nail feed member that is easy to process is required.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is a nail injection port provided in a nailing machine, and 2 is a nail supply path. 3 is a nail supply mechanism. The nail supply mechanism 3 supplies the connecting nail 4 loaded in the nail supply path 3 to the nail injection port 1, and is reciprocally movable in the nail feed cylinder 5 provided along the nail supply path 3. A piston rod 7 is integrally connected to the accommodated piston 6, and a nail feed member 9 is pivotally attached to a tip end portion of the piston rod 7 via a support shaft 8.

In the usual case, the piston 6 of the nail feed cylinder 5 is spring-biased to one side, and one end of the nail feed cylinder 5 is connected to the compressed air supply source and the atmosphere in conjunction with the operation of the nailing machine. An air passage (not shown) is formed. The compressed air is discharged from the air passage and reciprocated by the pressure difference between the spring pressure. However, the drive mechanism of the piston 6 is not limited to this example. Another known drive mechanism, for example, one in which compressed air passages are provided at both ends of the nail feeding cylinder 5 and the piston 6 is driven by alternately supplying and discharging compressed air to both passages may be used.

The nail feed member 9 is composed of a member base portion 9a supported at the tip of the piston rod 7 and a pair of feed pawls 9b formed at the tip of the member base portion 9a. A space S is formed in the member base 9a, and the distal end of the piston rod 7 is housed in the space S and is pivotally attached to the member base 9a via a support shaft 8. As a result, the feed claw 9b of the nail feed member 9 can be rotated with respect to the piston rod 7 so that the feed claw 9b can enter or retract into the nail supply path 3.

Next, an engaging wall 10 that engages with the outer peripheral surface 7a of the piston rod 7 is formed in the vicinity of the pivotal portion of the nail feeding member 9, and the engaging wall 10 has the feeding claw. The first stop surface 11 which positions the nail 9b at a predetermined position in the nail supply path 3 (see FIG. 2) and the rotation of the feeding claw 9b in the retreat direction at a predetermined angle (see FIG. 3). A second stop surface 12 is formed. A torsion coil spring 14 that engages with the stepped portions 13a and 13b of the piston rod 7 and the nail feeding member 9 is attached to the support shaft 8, and the nail feeding member 9 is normally moved to the entry position side by the torsion coil spring 14. The outer peripheral surface of the piston rod 7 and the first stop surface 11 are engaged with each other by the spring.

According to the nail supply mechanism having the above-described configuration, the piston rod 7 reciprocates along the nail supply path 3 with the operation of the nail feed cylinder 5. At the time of forward movement, the feed claw 9b is in the entry position in the nail supply path 3 by the torsion coil spring 14, so the feed claw 9b engages with the connecting nail 4 loaded in the nail supply path 3 and sends it out in the supply direction. The leading nail of the connecting nail 4 is supplied to the nail firing outlet 1. On the other hand, at the time of returning, the connecting nail 4 is held by the not-shown non-return mechanism so as not to move backward, so that the feed claw 9b rotates in the retreating direction against the spring force of the torsion coil spring 14. The connecting nail 4 retreats beyond the nail axis, and at the moving end, it is rotated again by the torsion coil spring 14 to enter the entry position.

In the rotation of the nail feeding member 9, the predetermined position of the feeding claw 9b for entering and the predetermined angle for retracting are the outer peripheral surface 7a of the piston rod 7 and the first stopping surface 11 of the nail feeding member 9 and Defined by the second stop surface 12. That is, the accuracy of the stop position of the feed claw 9b is determined only by the processing accuracy of the first stop surface 11 and the second stop surface 12 formed on the nail feed member 9. In this case, the machining of the stop surface of the nail feeding member 9 is relatively easy and the required accuracy can be sufficiently satisfied. Therefore, the feeding pawl 9b at the time of rotation is always stopped at the correct position. be able to.

Further, unlike the prior art, a pin for setting the entry position of the feed claw 9b is not required, and the number of man-hours for assembling the pin, which requires precision, can be reduced, and the piston rod 7 can be engaged. Since the process for forming the surface is not necessary and only the nail feeding member 9 which is easy to process is required, the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory view of a nail supply mechanism of a nail driver according to the present invention.

FIG. 2 is a motion explanatory view when the nail feeding member moves forward by the cross section of the nail supply mechanism.

FIG. 3 is an operation explanatory diagram of the nail feeding member when the nail feeding member is moved back by the cross section of the nail supply mechanism.

FIG. 4 is a structural explanatory view of a conventional nail feeding member.

[Explanation of symbols]

 1 Nail Injection Port 4 Connection Nail 5 Nail Feed Cylinder 6 Piston 7 Piston Rod 9 Nail Feed Member 9b Feed Claw 11 First Stop Surface 12 Second Stop Surface

Claims (1)

[Scope of utility model registration request] 1. A nail supply mechanism for supplying a connecting nail loaded in a nail supply path of a nailing machine to a nail injection port, and reciprocally movable in a nail feed cylinder provided along the nail supply path. A piston rod of the piston housed in the piston and a nail feed member supported by the tip end portion of the piston rod, and the nail feed member is provided with respect to the piston rod, and the feed pawl formed at the tip end of the nail feed member is the nail. While pivotally rotatably pivoting to an entry position that enters a predetermined position inside the supply path and a retreat position that retreats to a predetermined position outside the nail supply path, while urging the nail feeding member toward the entry position by a spring, A first stop surface for engaging the outer peripheral surface of the piston rod to position the tip of the feed pawl at the entry position in the vicinity of the pivot portion of the nail feed member,
A nail supply mechanism for a nailing machine, characterized in that a second stop surface for limiting the rotation of the feed claw in the retracting direction to a predetermined angle is formed.