JPH0539906U - Nail escape device for nailer for loose nails - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a nail escape device of a nailing machine for loose nails, which reliably detects whether or not nails are being supplied one by one and prevents idle driving by a nailing head. A nail escape device for a nailing machine for loose nails, comprising a nail feed passage connecting at least two parts feeders for supplying loose nails having at least two lengths and a nailing head, from a parts feeder. A nail selection escape unit that controls only one of the received two types of nails to be sent to the downstream direction of the nail feed passage at a time, and at least one provided in the nail feed passage downstream of the nail selection escape unit. Proximity to one of the nails sent from the nail selection escape unit by the nail passing signal from the first nail passing sensor provided between the first nail passing sensor and the nail selecting escape unit and the first nail passing sensor. The air blower operates to blow air from the upstream side of the nail and sends one nail to the downstream side of the nail feed passage, and the air blow section upstream from the nailing head. And a second nail passage sensor provided in the nail feeding passage near the nailing head.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention selects two types of loose nails and feeds them individually into the nailing holes of the nose of the nailing head, and drives them from the nailing holes by a rod-shaped driver that reciprocates in the nailing holes. The present invention relates to a nail escape device of a nailer for loose nails that is driven into a batting material.

[0002]

[Prior art and its problems]

 Conventionally, as a device for arranging two types of headed rods (for example, screws) with different shapes on each shoot and sending them out to one passage according to a preset order and ratio by an electric circuit, A double-row headed bar feeding device described in Japanese Patent Publication No. 46-18437 is known.

The double-row headed bar feeder described in Japanese Patent Publication No. 46-18437 mentioned above is a headed bar for detecting the passage of the headed bar in a flexible hose from the apparatus body to the air driver. No passage sensor is provided. Therefore, it is impossible to detect whether or not the headed rods are surely supplied to the air driver one by one.

[0004]

[Problems to be solved by the device]

 An object of the present invention is to provide a nail escape device for a nailing machine for loose nails, which reliably detects whether or not one nail is supplied at a time and prevents idle driving by a nailing head. ..

[0005]

[Means for Solving the Problems]

 The present invention relates to a nail escaping device for a nailing machine for loose nails, which includes a nail feeding passage for connecting a nailing head with at least two parts feeders for supplying loose nails having at least two lengths. A nail selection escape unit for controlling only one of the two types of nails received from the feeder to be sent to the downstream side of the nail feed passage at a time, and a nail feed passage provided downstream of the nail selection escape unit in the nail feed passage. The nail selection escape unit is provided with at least one first nail passage sensor and a nail passage signal from the first nail passage sensor provided between the nail selection escape unit and the first nail passage sensor. Proximity to the sent one nail and blowing air from the upstream side of the nail to send the one nail in the downstream direction of the nail feed passage. And Aburo unit, characterized in that it consists of a second nail passage sensor provided in the nail feed path proximate to the nail striking heads in the upstream direction of the nailing head.

[0006]

[Operation and effect of the device]

 According to the present invention, the first nail passage sensor detects that one nail of the two kinds of nails has been selected and escaped, and emits a nail passage signal. The air is blown to the nails to ensure the feeding of the nails, and the second nail passing sensor detects that one of the nails has been reliably fed to the nailing head, so the timing of feeding the nails is accurate. The blanking of the nailing head is prevented.

[0007]

【Example】

 A preferred embodiment of the present invention will be described in detail with reference to FIGS. As shown in FIG. 1, a nailing machine 1 for loose nails according to an embodiment of the present invention includes a loose nail feeder unit 2 and a nail selecting escape unit provided close to the loose nail feeder unit 2. 2A, an intermediate nail escape unit 3, a robot nail escape unit 4, and a nailing head 5.

As shown in FIGS. 2 to 6, the loose nail feeder unit 2 includes a wooden nail feeder 6 and an iron nail feeder 7. The wooden nail feeder 6 and the iron nail feeder 7 are ordinary vibration type parts feeders. As an example, the wooden nail feeder 6 is as follows. The wooden nail feeder 6 includes a hopper 8 that provides wooden nails, a mortar-shaped vibrating portion 9 that receives the wooden nails from the hopper 8, and a plurality of trees that are inclined from the vibrating portion 9 so that the front end is low. It consists of a wooden nail alignment feed rail 10 for guiding the nails and sending the wooden nails from the rear end to the front end by the weight of these wooden nails. In addition, the wooden nail feeder 6 controls the frequency of the vibrating section 9 to control the alignment feed speed of the wooden nails, and the nail supply section of the hopper 8 in response to a signal from the nail detecting section 14 described later And a hopper controller 13 for generating a signal for opening and closing (not shown). The iron nail feeder 7 has the same structure as that of the wooden nail feeder 6, and is located near the front ends of both the iron nail alignment feed rail 10 and the iron nail alignment feed rail 11, and the nail shank on the upper surface of the feeder table 15. A nail detector 14 is fixed on the upper surface of the guide 16 to detect whether or not a wooden nail or an iron nail is present in the nail shank guide 16 by photoelectric means.

As shown in FIGS. 3, 4 and 6, the nail shank guide 16 includes a nail feed passage 10 a of the iron nail alignment feed rail 10 and a nail feed passage 11 a of the iron nail alignment feed rail 11. There are provided nail feed passages 10b and 11b aligned with. In the center between the nail feeding passages 10b and 11b, there is provided a nail drop hole 17 having a semicircular cross section, which provides a drop position for one of the selected one of the wooden nail and the iron nail. Is formed so as to penetrate from the upper surface to the lower surface. Nail drop hole 17 and nail feed paths 10b and 11b are not in communication with each other.

As best shown in FIG. 6, the nail selection escape unit 2 A is fixed to the upper surface of the feeder table 15 in a state where a part thereof is in sliding contact with the front surface of the nail shank guide 16. The nail selection escape unit 2A includes right and left nail selection air cylinders 18 and 19. The wood nail selecting air cylinder 18 will be described below. A wood nail escape block 20 is fixed to the tip of the piston rod 18a of the wood nail selecting air cylinder 18, and a wood nail escape tip 21 is fixed to the upper surface of the wood nail escape block 20 near the tip. A nail receiving groove 22 extending in the vertical direction is formed on the rear surface of the tip of the wooden nail escape tip 21. The cross section of the nail receiving groove 22 is a semi-circular shape having a diameter larger than the diameter of the wooden nail expanding head at the upper end of the nail receiving groove 22 and a rectangular shape at the lower end of the nail receiving groove 22. The cross section is connected by a smooth slope 22a. At the position where the piston rod 18a of the wood nail selecting air cylinder 18 is most retracted, the nail receiving groove 22 is aligned with the nail feeding passage 10b.

In this aligned position, even if the nail receiving groove 22 receives a wooden nail from the nail feeding passage 10b of the nail shank guide 16, the nail shank guide forming the nail drop hole 17 with the rear surface 21a of the wooden nail escape tip 21. Since the size of the gap between the front surface 17a of 16 and the front surface 17a is smaller than the diameter of the expanded head of the wooden nail, the wooden nail does not fall into the nail drop hole 17. On the other hand, when the wooden nail is received in the nail receiving groove 22 and the piston rod 18a of the wooden nail selecting air cylinder 18 has advanced to the foremost end, the expanded head of the wooden nail slides down along the slope 22a and drops the nail. It falls toward the hole 17.

The structure and operation of the iron nail selecting air cylinder 19 are exactly the same as those of the wooden nail selecting air cylinder 18. As shown in FIG. 1, the nail sorting air cylinders 18 and 19 are controlled by solenoid valves 23 and 24.

As shown in FIG. 5, in the feeder table 15, a circular nail drop hole 25 is provided below the nail drop hole 17 and the lower side of the nail drop hole 25 is provided. At, the air blow section 26 is fixed to the feeder table 15. The air blow portion 26 has a vertically inverted cone-shaped nail drop hole 27 connected to the nail drop hole 25 and a cylindrical hole 28 connected to the lower end of the nail drop hole 27. It has a joint 29. On the peripheral wall 26a of the air blow portion 26, an air blowing hole 30 that opens into the nail dropping hole 27 slightly above the lower end of the nail dropping hole 27 is obliquely provided. The air blowing hole 30 is connected to the air tube 32 via an elbow 31. As shown in FIG. 1, the air blowing timing is determined by a solenoid valve 33 controlled by a nail passage signal from a nail passage sensor 36 described later.

An upper end 35 a of a rotary joint 35 provided on the upper end of a flexible nail feed tube 34 is screwed into the tube joint 29. A nail passage sensor 36, which detects whether a nail has passed through the rotary joint 35 or not by photoelectric means, is fixed to the air blow portion 26 at a position close to the rotary joint 35 and on the downstream side of the rotary joint 35. It is installed in the state where it was installed.

As shown in FIGS. 1 and 7, the intermediate escape unit 3 mainly includes an intermediate escape unit support plate 37 and a nail stop air cylinder fixed to the lower surface of the intermediate escape unit support plate 37. 38 and two nail passage sensors 40, which are fixed to the intermediate escape unit support plate 37 via a mounting member 39 at a position below the nail stop air cylinder 38, and detect the passage of nails by photoelectric means. 41 and an air blow portion 42 fixed to the attachment member 39 at a position below the nail passage sensors 40 and 41.

A tube joint 38 is fixed to the upper surface of the intermediate escape unit support plate 37. A lower end 43a of a rotary joint 43 provided at the lower end of the nail feed tube 34 is screwed into the tube joint 38. A nail stopper base 44 is fixed to the lower side of the tube joint 38 via the intermediate escape unit support plate 37. The nail stopper base 44 has a nail feed hole 38a of the tube joint 38 and a nail feed hole 44a communicating with the nail feed hole 37a of the intermediate escape unit support plate 37, and is connected to the flexible nail feed tube 45. The nail feed hole 44a communicates with the hole of the nail feed tube 45. The nail stopper base 44 is provided with a guide hole 46 that extends in parallel with the intermediate escape unit support plate 37 and opens into the nail feed hole 44a.

A nail stop pin 47 is fixed to the tip of the piston rod 38a of the nail stop air cylinder 38 coaxially with the piston rod 38a. The nail stop pin 47 has a front end slope 47a formed as a slope that rises to the right shoulder, and reciprocates in the guide hole 46 of the nail stopper base 44. As shown in FIG. 7, when the piston rod 38a is at the most advanced position, the front end inclined surface 47a of the nail stop pin 47 abuts on the side edge of the expanding head of the nail N and the nail shank portion. This stops the nail in cooperation with the wall of the nail feed hole 44a.

The nail passage sensor 40 of the nail passage sensors 40 and 41 is installed above the nail passage sensor 41, and the shaft of the nail stopped by the nail stop pin 47 by the nail passage sensors 40 and 41. The length of the part is detected to detect whether an iron nail or a wooden nail has passed. The structure of the air blow section 42 is the same as that of the air blow section 26.

The robot escape unit 4 is installed on the downstream side of the intermediate escape unit 3 and has the same configuration as the intermediate escape unit 3.

A nailing head 5 is connected to the downstream side of the robot escape unit 4. The nailing head 5 is pivotally supported by an arm (not shown) of a nailing robot by a bracket 48 provided on the upper end of the nailing head 5. The nailing head 5 is connected to the lower end of the bracket 48 via a shock absorber 49. As shown in FIG. 8, in the nail driving head 5, a rod-shaped driver 59 is reciprocated in the nose 51 by a striking air cylinder (not shown) using compressed air as a power source, and the nail driving material 5 is driven. It is configured to drive a nail into. The nailing head 5 is moved to an arbitrary nailing position by the arm of the nailing robot, and the trigger 52 is operated by a control signal from a control device (not shown) to control the operation of the striking air cylinder.

As shown in FIG. 8, a nail guide 53 is provided at the upper end of the nose 51 as a part of the nose 51. The nail guide hole 55 extending diagonally in the nail guide 53 is different from the nail guide hole 54 extending vertically in the nose 51. And is connected to the tube joint 56 at the outer end. The nail stopper 60 opens between the nail guide hole 55 and the nail ejecting hole 54 during the nail striking stroke of the striking air cylinder by opening the contact arm 63 upward and downward. The lower end 57a of the rotary joint 57 is screwed into the tube joint 56. The rotary joint 57 is connected to a nail feed tube 58 extending from the robot escape unit 4. On the upstream side of the rotary joint 57, a nail passage sensor 62 fixed to the nail guide 53 via a mounting member 61 and detecting the passage of the nail by photoelectric means is fixed.

[Brief description of drawings]

FIG. 1 is a perspective view of a nail escape device of a nailer for loose nails according to an embodiment of the present invention.

FIG. 2 is a side view of a nail feeder unit and a nail selection escape unit of the nail escape device of the nailer for loose nails according to the embodiment of the present invention.

FIG. 3 is a plan view of a nail feeder unit and a nail selection escape unit of the nail escape device of the nailer for loose nails according to the embodiment of the present invention.

FIG. 4 is a front view of the nail feeder unit and the nail selection escape unit of the nail escape device of the nailer for loose nails according to the embodiment of the present invention.

FIG. 5 is an enlarged side view of the nail selection escape unit of the nail escape device of the nailer for loose nails according to the embodiment of the present invention.

FIG. 6 is an enlarged plan view of a nail selection escape unit of the nail escape device of the nailer for loose nails according to the embodiment of the present invention.

FIG. 7 is a side sectional view of an intermediate escape unit of the nail escape device of the nailer for loose nails according to the embodiment of the present invention.

FIG. 8 is an enlarged side view of a part of the nailing head of the nail escape device of the nailer for loose nails according to the embodiment of the present invention.

[Explanation of symbols]

 1 nailer for loose nail 2 loose nail feeder unit 2A nail selection escape unit 3 intermediate nail escape unit 4 robot nail escape unit 5 nailing head 6 wood nail feeder 7 iron nail feeder 26 air blow section 36 nail passage sensor 62 nail Passage sensor

Claims (1)

[Scope of utility model registration request] 1. A nail escape device for a nailing machine for loose nails, comprising a nail feed passage connecting at least two part feeders supplying loose nails having at least two lengths and a nailing head. A nail selection escape unit that controls only one of the two types of nails received from the parts feeder to be sent to the downstream direction of the nail feed passage at a time, and a nail feed passage provided downstream of the nail selection escape unit in the nail feed passage. The at least one first nail passage sensor, and a nail passage signal from the first nail passage sensor provided between the nail selection escape unit and the first nail passage sensor. It operates so as to blow air from the upstream side of the nail that is close to the sent one nail and sends the one nail in the downstream direction of the nail feed passage. A nail escape device for a nailing machine for loose nails, which comprises an ablow section and a second nail passage sensor provided in a nail feed passage in the upstream direction of the nailing head in the vicinity of the nailing head.