JPH0633677U - Fastener pulling machine - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a fastener removing machine for removing fasteners, such as staples and nails, which have been once driven into a fastener driving material. [Structure] An air piston / cylinder mechanism and a fastener pad that is integrally connected to the air piston and has a rod-shaped overall shape that projects from one end side of the air cylinder in the axial direction of the air cylinder and is locked to the head of the fastener. And a nose unit fixed to one end side of the air cylinder and forming a reciprocating path for the fastener pull-out driver, and an air piston forward that applies a pressing force of compressed air to the side surface of the air cylinder end side of the air piston. A moving means, an air piston returning means for applying a pressing force to the side surface of the air piston on the other end side of the air cylinder, and a manually operated trigger valve for controlling the air piston forward moving means and the air returning means by shutting off the supply of compressed air. Consists of.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fastener pulling machine for pulling fasteners such as staples and nails.

[0002]

[Prior art and its problems]

 BACKGROUND ART Conventionally, as a machine for driving fasteners such as staples and nails into a fastener driving material, a pneumatic fastener driving machine having a rod-shaped driver driven by a pneumatic striking piston / cylinder mechanism is known. However, there is no power machine to pull out the fastener once driven.

For example, when painting a door unit used in a prefabricated house, the crown portion of the staple formed in a U-shape on the upper end surface of the door unit is driven while floating from the surface, The door unit is hung by the wire trapped in the crown. After painting the door unit, the staples must be removed from the door unit. This staple pulling out work is currently performed substantially manually using a simple tool. However, manually pulling out the staples reduces the production efficiency of the door unit and raises its production cost in the factory production where a large number of door units are produced and painted.

[0004]

[Problems to be solved by the device]

 An object of the present invention is to provide a fastener pulling machine that pulls out fasteners (such as staples and nails) that have been once driven into a fastener driving material. Another object of the present invention is to provide a pneumatic fastener puller driven by a pneumatic piston / cylinder mechanism.

[0005]

[Means for Solving the Problems]

 The present invention has an air piston / cylinder mechanism integrally connected to the air piston and has a rod-like shape as a whole. The air cylinder protrudes from one end of the air cylinder in the axial direction of the air cylinder and is locked to the head of the fastener. The fastener pull-out driver equipped with a fastener abutment, the nose unit fixed to one end side of the air cylinder and forming the reciprocating path of the fastener pull-out driver, and the compressed force of compressed air on the side of the air cylinder end side of the air piston. The air piston forward moving means to be applied, the air piston backward moving means for applying a pressing force to the air cylinder other side surface of the air piston, and the air piston forward moving means and the air piston backward moving means are controlled by the supply / shutoff of compressed air. It consists of a manually operated trigger valve to control.

[0006]

[Operation and effect of the device]

 When the other end of the air cylinder is opened by operating the trigger valve, compressed air is supplied to the side surface of the air piston on the other end side of the air cylinder, and the fastener pull-out driver advances the reciprocating path in the nose unit in the return path direction. Return to position. Then, by operating the trigger valve in the opposite direction, compressed air is supplied to the side surface of the air piston on one end side of the air piston, and the fastener pull-out driver retracts in the forward and backward directions in the nose unit in the forward direction to staple the crown. The fastener is pulled out from the fastener driving material by the fastener contacting part that is applied to the head or the expanded diameter part of the nail.

Since the fastener is pulled out by the power of the compressed air, the labor of the fastener pulling operator can be reduced.

[0008]

【Example】

 Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 shows a pneumatic staple puller according to a first embodiment of the present invention. In a pneumatic staple pulling machine, a housing 1, an air piston / cylinder mechanism 2 built in the housing 1, a staple pulling driver 4 connected to an air piston 3, and a staple pulling driver 4 reciprocate. It comprises a nose unit 5, a trigger valve 6 for manually controlling the operation of the air piston / cylinder mechanism 2, and a trigger 7 directly operated by an operator.

The housing 1 is composed of a housing main portion 8 having an air piston / cylinder mechanism 2 built in the front portion thereof, and a grip 9 extending from the housing main portion 8 in the lateral axis direction of the housing main portion 8. Inside the grip 9, a compressed air storage chamber 10 that acts as an accumulator is formed. A plug 9a is provided at the rear end of the grip 9. The compressed air storage chamber 10 is connected to an external compressed air source via the plug 9a.

The air piston / cylinder mechanism 2 is mainly composed of a cylindrical air cylinder 11 fixed in a housing main portion 8, the air piston 3 reciprocally mounted in the air cylinder 11, and an air cylinder. A head valve 12 that directly supplies compressed air to the air piston upper chamber formed inside the air piston 3 and discharges air from the air piston upper chamber in 11 and a piston rod provided on the lower surface side of the air piston 3. 13 and.

The partition between the air cylinder 11 and the housing main portion 8 is vertically divided by a partition wall 14 inside the housing main portion 8. The space formed above the partition wall 14 is integrated with the compressed air storage chamber 10 and is opened and closed by the head valve 12. Below the partition wall 14, a blow air storage chamber 15 is formed as an air piston forward movement means. The air piston lower chamber 16 and the blow air storage chamber 15 formed below the air piston 3 in the air cylinder 11 communicate with each other by two kinds of vent holes 17 and 18 formed in the peripheral wall of the air cylinder 11. is doing.

The vent holes 18 are in contact with the upper end of a bumper 19 fixed to the lower end of the air cylinder 11, and are opened in a state of being dispersed in the circumferential direction of the cross section of the air cylinder 11. The air passage 18 has a larger air passage cross-sectional area than the air passage 17 and has a lower stroke of the air piston 3 (a stroke of returning to the initial position). The majority is sent into the blow air storage chamber 15, and compressed air is sent from the blow air storage chamber 15 into the air piston lower chamber 16 in the ascending step of the air piston 3 (that is, the staple drawing stroke). The vent hole 18 is communicated with the lower surface side of the air piston 3 even when the air piston 3 reaches the lowest point in its descending stroke.

The vent holes 17 are open above the vent holes 18 in a distributed manner in the circumferential direction of the cross section in the air cylinder 11. When the air piston 3 reaches the lowest point in its descending stroke, it is positioned slightly above the upper surface of the air piston 3, and the compressed air introduced into the air piston upper chamber in the descending stroke of the air piston 3. Is sent into the blowing air storage chamber 15. The ventilation hole 17 is provided with a check valve 19 at the open end facing the blower air storage chamber 15. By the action of the check valve 19, all of the compressed air in the blow air storage chamber 15 is sent from the ventilation hole 18 into the air piston lower chamber 16 in the ascending stroke of the air piston 3.

The head valve 12 is of a conventional type, and is supplied to the control chamber 12a via the compressed air storage chamber 10, the trigger valve 6 and the air passage pipe 20 when the operator does not pull the trigger 7. Due to the pressure of the compressed air, the space between the compressed air storage chamber 10 and the air piston upper chamber is closed. When the operator pulls the trigger 7, the compressed air in the control chamber 12a is released into the atmosphere through the air passage pipe 20 and the trigger valve 6, and the head valve piston 12b rises to cause the compressed air storage chamber to rise. Open between 10 and the air piston upper chamber.

As shown in FIGS. 1 and 2, the staple pull-out driver 4 is integrally formed with the piston rod 13 attached to the air piston 3, the piston rod 13, and the lower end of the piston rod 13. It is composed of an L-shaped staple applying portion 21. The staple contact portion 21 projects forward from a guide groove 22 that extends from the lower end to the vicinity of the upper end of the front surface portion 25 of the nose unit 5. The lower surface 23a of the cross member 23 of the staple applying portion 21 is inclined so as to rise from the rear to the front. As a result, it becomes easy to insert the cross member 22 of the staple contact portion 21 below the staples that are driven while floating from the surface of the fastener driving member.

The nose unit 5 is fixed to the lower end of the housing main portion 8 as shown in FIGS. 1, 2 and 4. The nose front surface portion 25 located on the front surface side of the piston rod 13 of the air piston 3 is fixed by a bolt 24 to the nose rear surface portion 26 located on the rear surface side of the piston rod 13 of the air piston 3. The guide groove 22 is formed on the nose front portion 25 as described above. At the lower end of the nose rear surface portion 26, as shown in FIG. 1, a contact portion 27 that projects laterally with respect to the nose rear surface portion 26 is integrally formed with the nose rear surface portion 26. By applying the contact portion 27 to the surface of the fastener driving material before the staple pulling-out work, the staple contact portion 21 is in the correct posture (that is, the cross member 22 of the staple contact portion 21 is the crown of the staple). Positioned below the crown portion of the staple (in a position parallel to the portion).

The trigger valve 6 is of a conventional type and is arranged at the lower boundary between the housing main portion 8 and the grip 9. The operator manually operates the trigger 7 to operate the trigger valve 6 of the head valve 12. Control opening and closing.

The operation of the staple pulling machine will be described below. When the trigger 7 is pulled, the head valve 12 is opened, compressed air is supplied to the upper chamber of the air piston, and the air piston 3 and the staple pull-out driver 4 descend. In this state, the operator inserts the staple contact portion 21 below the crown portion of the staple, and then releases the trigger 7, and while the staple contact portion 21 is being positioned, the air piston upper chamber passes through the ventilation hole 17 and the air piston upper chamber. The compressed air introduced into the blow air storage chamber 15 is blown into the air piston lower chamber 16 through the ventilation hole 18 to raise the air piston 3 and the staple pull-out driver 4. As a result, the staples are removed from the staple driving material (see FIG. 5).

FIG. 3 shows, as another embodiment of the fastener pulling machine, a nail pulling driver 28 and a part of the nose front surface portion 25a when the fastener is a nail. The nail pulling driver 28 is L-shaped and has a nailing portion 29, which is similar to the case of the staple pulling driver 4. A U-shaped groove 30 is formed at the center of the tip of the nailing portion 29. As shown in FIG. 4, when the head 32 is floated on the nail driving material 31 and the driven nail 33 is removed, the U-shaped groove 30 is applied to the shank portion 34 of the nail 33. In the first embodiment, the contact portion 27 provided on the nose rear surface portion 26 may be provided at the tip of the nose front surface portion (see FIGS. 2 and 3).

FIG. 5 shows a pneumatic staple puller according to another embodiment of the present invention. The pneumatic staple pull-out machine mainly comprises a housing 41, a single-acting air piston / cylinder mechanism 42 built in the housing 41, a staple pull-out driver 44 connected to the air piston 43, and a staple pull-out driver 44. It comprises a moving nose unit 45, a trigger valve 46 for controlling the supply and interruption of compressed air to the air piston 43, and a trigger 47 for the operator of the staple pulling machine to directly operate the trigger valve 46.

The housing 41 includes an air cylinder 48 that is a part of the air piston / cylinder mechanism 42, and a grip 49 that extends in the horizontal axis direction of the air cylinder 48. Inside the grip 49, a compressed air storage chamber 50 that functions as an accumulator is formed. A plug 51 is provided at the rear end of the grip 49. The compressed air storage chamber 50 is connected to an external compressed air source via a plug 51.

The air piston / cylinder mechanism 42 mainly includes an air cylinder 48, the air piston 43 that is reciprocally mounted in the air cylinder 48, and a cylinder cap 52 provided at an upper end of the air cylinder 48. It consists of and. An upper bumper 53 made of synthetic resin rubber is provided on the lower surface of the cylinder cap 52. At the lower end inside the air cylinder 48, a perforated disc-shaped upper end flange 54 of the nose unit 45 is arranged. Sealing rings 55 a and 55 b are fitted on the inner peripheral surface and the outer peripheral surface of the flange 54. A lower bumper 56 made of synthetic resin rubber is fixed to the upper surface of the flange 54. A return spring 57 is arranged between the cylinder cap 52 and the air piston 43.

The staple pulling-out driver 44 has an L-shaped driver chip 58 projecting in the lateral axis direction of the staple pulling-out driver 44 at the tip thereof. The driver chip 58 has a staple contact portion 59 that protrudes forward (to the left in FIG. 5) of the staple pulling machine. The lower surface of the staple applying portion 59 rises from the middle portion thereof toward the front of the staple pulling machine.

The flange 54 of the nose unit 45 is fixed in the air cylinder 48 as described above, and the nose body portion 60 extends below the air cylinder 48 coaxially with the air cylinder 48. At the front of the nose unit 45, there is formed a guide groove 61 extending from the lower end surface of the nose main body 60 to a midway portion and for guiding the staple contact portion 59 up and down.

The trigger valve 46 is fitted and inserted on the lower surface side of the grip 49 (on the leading end side of the staple pulling machine) adjacent to the air cylinder 48. The trigger valve 46 is a spool valve and includes a cylindrical valve casing 62 and a spool 63. An upper large diameter portion 64 and a lower large diameter portion 65 are provided at the upper and lower ends of the spool 63. The upper large-diameter portion 64 comes into contact with and separates from the upper surface of the valve casing 62 via a seal ring 66 that is in close contact with the lower surface thereof and is fitted to the spool 63. The lower large-diameter portion 64 comes into contact with and separates from the lower surface of the valve casing 62 via a seal ring 67 fitted to the peripheral surface thereof. A vent hole 68 is provided in the peripheral wall of the intermediate portion of the valve casing 62. The ventilation hole 68 is connected to a ventilation path 69 formed in the housing 41. The air passage 69 is connected to the inside of an air piston lower chamber formed below the air piston 43 in the air cylinder 48.

The operation of the staple pulling machine will be described below. When the trigger 47 is not pulled, the air piston 43 is stopped at the lower end by the return spring 57, and the driver tip 58 of the staple pulling driver 44 also projects from the lower end of the nose unit 45 to the front of the staple pulling machine. . In this state, the operator inserts the staple contact portion 59 under the crown portion of the staple that has been driven while floating on the staple driving material. Then, when the operator pulls the trigger 47, the lower large diameter portion 65 of the trigger valve 46 closes the space between the lower end opening of the valve casing 62 and the atmosphere, and substantially at the same time, the upper large diameter portion 64 of the upper end of the valve casing 62 tops. Open between the opening and the compressed air storage chamber 50. As a result, compressed air is introduced from the compressed air storage chamber 50 into the lower chamber of the air piston, and the staple pull-out driver 44 rises to remove the staples from the staple driving member.

By changing the front end shape of the driver tip 58, the nail whose head is in contact with the surface of the nail driving material and the lower part of the nail and staple whose crown is in contact with the surface of the staple driving material are also provided. These nails and staples can be pulled out by inserting the driver chip contacts.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a staple pulling machine according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a staple pull-out driver inserted below the staple and a part of the nose unit.

FIG. 3 is a perspective view showing a nail pull-out driver applied to a nail and a part of a nose unit.

FIG. 4 is an explanatory diagram showing an operating state of a staple pull-out driver.

FIG. 5 is a vertical sectional view of a staple pulling machine according to another embodiment of the present invention.

[Explanation of Codes] 2 Air Piston / Cylinder Mechanism 3 Air Piston 4 Staple Pullout Driver 5 Nose Unit 6 Trigger Valve 7 Trigger 11 Air Cylinder 12 Head Valve (Air Piston Returning Means) 15 Air Storage Chamber for Blow (Air Piston Forward Movement) Means) 17, 18 Vent hole (air piston forward movement means) 19 Check valve (air piston forward movement means) 27 Abutment portion (fastener abutment portion) 28 Nail removal driver 28a Nail abutment portion 29 Nose unit 42 Air piston / cylinder mechanism 43 Air piston 44 Staple pull-out driver 45 Nose unit 46 Trigger valve 47 Trigger 48 Air cylinder 57 Return spring 59 Staple contact part 68 Vent hole 69 Vent path

Claims (1)

[Scope of utility model registration request] 1. An air piston / cylinder mechanism and an air piston, which are integrally connected to each other and have a rod-like shape as a whole, project from one end side of the air cylinder in an axial direction of the air cylinder, and are locked to a head portion of a fastener. A fastener pull-out driver equipped with a fastener abutment, a nose unit fixed to one end of the air cylinder and forming a reciprocating path for the fastener pull-out driver, and air for applying a pressing force by compressed air to the side of the air piston end of the air cylinder. Manual operation for controlling the piston forward movement means, the air piston backward movement means for applying a pressing force to the side surface of the air piston on the other end side of the air cylinder, and the air piston forward movement means and the air backward movement means by supplying / cutting compressed air Fastener pull-out machine consisting of the trigger valve and.