JPH04348902A - Automatic nailer - Google Patents

Abstract

PURPOSE:To provide an automatic nailer capable of driving synthetic resin nails and the like without having an influence on the wood quality of lumber to be joined. CONSTITUTION:On a rotating shaft 5 vertically arranged on the fixing bottom plate 4 of a working table or the like, a revolutional base plate 6 is revolutionarily outward fitted. On the revolutional base plate 6, a drill 1 for making prepared holes on lumber and a nailer 2 for driving nails along the prepared holes are supported in the radial direction about the rotating shaft. The revolutional base plate 6 is designed to be rotated by a driving part 7. By making the rotating base plate 6 rotate right and left, the position of the drill 1 and the position of the nailer 2 can be replaced, thereby moving the nailer 2 to the position in which a hole is made by the drill 1.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention relates to an automatic nailer for driving nails for joining wood, etc., and more particularly to an automatic nailer for driving a nail after drilling a pilot hole at a nailing position.

0002

2. Description of the Related Art Generally, when constructing a house, wood is joined using nails. Further, when driving nails, a nail gun is used which shoots a nail using the force of compressed air or the like and drives the nail into the nail. This nail gun drives a nail with one hand by pressing the tip of the machine into the position where the nail is to be driven and pulling the trigger.

However, like prefabricated houses, etc.
When building components are formed to a certain standard by joining pieces of wood together in a factory, etc., workers repeatedly place the pieces of wood in predetermined positions and drive nails with a nail gun. I will do it. Therefore, when workers frequently use a nail gun, they must be careful not to injure their arms or elbows due to the impact of the nail gun. In addition, since the nail gun is supported by the worker's hands, it is difficult to drive the nails in the same position and in the same direction every time, which can lead to slight variations in the quality of construction components. It was inevitable.

[0004] Therefore, a nail gun is fixed on a workbench for joining pieces of wood together, and a stopper or the like is provided on the workbench to regulate the position of the pieces of wood to be joined. Automatic nailing devices have come into use, which automatically drive nails into wood when the wood is brought in. By using this automatic nailing device, it is possible to prevent strain on the worker's arms and the like, and to keep the nailing position constant.

[0005]

[Problem to be Solved by the Invention] By the way, when a worker holds a nail gun by hand and drives a nail, if there is a knot or the like in the nailing position of the wood to be joined, You can make decisions such as driving nails in that area. However, since the automatic nailing machine described above drives the nail into a certain position of the wood with a certain strength, it is not possible to avoid knots in the wood. If there is a problem, the nail 3 may not be driven all the way and the head of the nail 3 may stick out from the wood, as shown in Figure 4 (A), or the nail may become knotted as shown in Figure 4 (B). There were cases where the nail 3 was bent at position 4 and the tip of the nail 3 stuck out from the wood 2. If the tip of the nail 3 is bent or the nail 3 is not driven all the way, the strength of the joint between the timbers 1 and 2 may naturally be reduced.

[0006] Furthermore, there are wooden panels that form walls, floors, roofs, etc. as building materials for prefabricated houses, but since such wooden panels require high dimensional accuracy, they are manufactured using predetermined measurements. It is manufactured to be slightly larger than the size of the original, and at the finishing stage, the periphery is cut to the specified size using a circular saw or the like. At this time, if the head or tip of the nail 3 were to protrude beyond the timbers 1 and 2 as described above, there was a problem in that the blade of the circular saw would be damaged.

[0007] By using synthetic resin nails 5 instead of iron nails 3, it is possible to prevent the circular saw from being damaged as described above. However, the synthetic resin nail 5 is more easily bent than the iron nail 3 because it is influenced by the materials of the wood 1 and 2. The inventor drove synthetic resin nails 5 into timbers 6 and 7, cut the timbers 6 and 7 at the positions of the nails 5, and observed the cross section. As shown in C), the wood 6,
It was confirmed that when the wood grain 7 is diagonal, the nail 5 bends in a direction perpendicular to the wood grain. Furthermore, deformation of these synthetic resin nails is often not visible when viewed from the outside, making quality control difficult.

The present invention has been made in view of the above circumstances, and its purpose is to provide an automatic nailing device that can drive nails without being affected by the material of the wood to be joined. There is a particular thing.

[0009]

[Means for Solving the Problems] In order to solve the problems, the present invention provides a drill for drilling pilot holes in wood to be joined, a nailing machine for driving nails into the wood, and a method for using these drills and nailing machines. A rotation mechanism that integrally supports the machine in a rotatable manner, and the rotation mechanism includes a rotation shaft that is erected on a bottom plate that is fixed to a workbench, etc., and a rotation mechanism that rotates around the rotation shaft. A rotary base that is freely extrapolated and supports the drill and the nail gun so as to be movable back and forth along a radial direction with respect to the rotating shaft, and a drive unit that rotates the rotary base. It is characterized by comprising:

0010

[Operation] According to the above structure, the wood to be joined is first placed at a predetermined position in front of the drill. Next, with the drill in operation, move the drill forward. As the drill moves forward, a hole is made in the wood to be joined. Next, after retracting the drill, the rotating mechanism rotates the radially supported drill and nail gun until the nail gun is at the position of the drill. Then operate the nail gun,
Drive the nail into the hole in the wood. At this time, the nail is driven along the hole, so it will not bend due to the condition of the wood, such as knots or wood grain.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 7 are drawings showing the automatic nailing device A of this embodiment and its operating state, etc.
As shown in FIG. 2, the automatic nailing device A includes a drill 1
The nail gun is mainly composed of a nail gun 2, and a rotation mechanism 3 that rotatably supports the drill 1 and the nail gun 2 as a unit.

As shown in FIG. 3, the drill 1 is a well-known multi-spindle electric drill unit, and the multi-spindle drill part 1a at the tip thereof has three drill blades 1b vertically arranged in a row. They were placed side by side so that three holes could be drilled at once. Further, the blade 1b used has a diameter slightly smaller than the diameter of the nail to be driven. The multi-axis drill unit has a built-in moving mechanism that moves the multi-axis drill part 1a back and forth with respect to the multi-axis drill unit.

[0013] When drilling a hole in wood with the drill 1, the drill 1 is pressed against the wood with a certain amount of force while drilling, so the hole is expanded due to the elasticity of the wood. When the hole is drilled and the blade of the drill 1 is removed from the hole, the diameter of the hole contracts. Therefore, even if the diameter of the nail and the diameter of the drill bit 1b do not differ much, problems will not arise in the joint strength of the nail. Furthermore, if the diameter of the blade 1b is too small relative to the nail, there is no point in drilling the pilot hole.

The nailing machine 2 is a well-known compressed air type nailing machine, and compressed air is sent to an air cylinder device (not shown) inside the nailing machine, and this air cylinder device
The head of the nail is pressed and the nail is driven from the injection part 2a at the tip of the nail gun. In addition, the nail gun 2 has
There is an automatic nail feeding section 2b, which allows nails to be driven in continuously.

The rotating mechanism 3 is provided upright on the bottom plate 4, has a rotating shaft 5, is rotatably inserted into the rotating shaft 5, and rotates the drill 1 and the nail gun 2 radially back and forth. It is mainly composed of a rotary base 6 that supports the rotary base 6 in a movable manner and a drive section 7 that rotates the rotary base 6.

The rotating shaft 5 is a cylindrical column that is erected on one side edge of the upper surface of the bottom plate 4, which is an iron plate for fixing the automatic nailing device to a workbench or a production line for building components, etc. It is. The rotating base 6 has a cylindrical portion 6 that is fitted onto the rotating shaft.
a, and a base portion 6b extending in a fan shape from the lower part of the cylindrical portion 6a perpendicularly to the axial direction of the cylindrical portion 6a.

The cylindrical portion 6a is rotatably fitted onto the rotating shaft 5 through bearings (not shown) which are fitted around the outer periphery of the rotating shaft 5 in multiple stages. Furthermore, a connecting piece 6c is provided at the lower end of the cylindrical portion 6a, which extends perpendicularly to the axial direction of the cylindrical portion 6a, and is pin-coupled to an air cylinder portion 8 of the drive portion 7, which will be described later. And the cylindrical part 6
As shown in FIG. 4, a nail gun support part 9 for supporting the nail gun 2 is provided on the outer peripheral side surface of a. The support part 9 is attached to the side surface of the cylindrical part 6a so as to extend in the longitudinal direction thereof, and includes a vertical movement mechanism 10 that supports the nail gun 2 in a vertically movable manner, and a vertical movement mechanism 10 that supports the nail gun 2 in a vertically movable manner. and a horizontal movement mechanism 11 that supports the nail gun 1 so as to be movable along one side edge of the fan-shaped base portion 6b, that is, in the radial direction with respect to the rotating shaft 5. .

The vertical movement mechanism 10 includes a mounting portion 10a fixed to the side surface of the cylindrical portion 6a so as to extend along the longitudinal direction of the cylindrical portion 6a, and a mounting portion 10a fixed to the side surface of the cylindrical portion 6a on the side surface of the cylindrical portion 6a. Two horizontal movement mechanism guide rails 10b extending parallel to each other in the longitudinal direction, and protruding pieces 10c and 10d protruding from the upper and lower ends of the mounting portion 10a, respectively.
, a round bar 10e whose upper and lower ends are rotatably fitted to the protruding pieces 10c and 10d, and a protruding piece 1 at the lower end of the mounting portion 10a.
A drive motor 10f is provided inside the holder 0d and rotates the round bar 10e, and a drive motor 10f is provided inside the mounting part 10a to rotate the round bar 10e.
A stopper 10g that protrudes up to e and a guide rail 10b
It consists of a guide plate portion 12 that is guided by and meshes with the round bar 10e.

A threaded groove is provided on the outer circumferential surface of the round bar 10e from the upper end to the lower end, and is adapted to engage with a threaded hole to be described later. The guide plate section 12 is a vertically elongated plate body, and two guide pieces 12a are provided from the upper and lower parts of one side of the guide plate section 12 so that the guide rails 10b and 10b come into contact with each other. A screw portion 12c having a screw hole (not shown) that engages with the rod 10e is provided to protrude from the center of the one side surface to the round bar 10e. Furthermore, a guide groove 12d is provided on the tip end surface of each of the guide pieces 12a. The guide groove 12d is slidably fitted into the guide rail 10b.

Based on such a configuration, the vertical movement mechanism 10 rotates the round bar 10e by the drive motor 10f, so that the guide plate part 12 having the threaded part 12c meshing with the round bar 10e is moved to the guide rail. 10b and can be moved upward or downward. Further, the guide rail 10b is provided with limit switches LS1, LS2, and LS3 (shown in FIG. 6) at heights corresponding to the positions of the three blades 1b of the drill 1, and the guide plate portion 12 When the upper guide piece 12a contacts the limit switches LS1, LS2, and LS3, the injection part 2a of the nail gun 2 releases each blade 1 of the drill 1.
It is designed to detect that the height is equal to the height of b....

[0021] The horizontal movement mechanism 11 includes the guide plate portion 1
a support arm 11a extending in a radial direction with respect to the rotation center of the rotating base 6 from the lower end of the nail gun 2 and supporting the nail gun 2 so as to be movable back and forth along the radial direction; It consists of an air cylinder part 11b that presses the air in the horizontal direction.

The support bowl portion 11a is a plate extending in the radial direction from the lower end of the guide plate portion 12, and a guide rail 11c for guiding the nail gun 2 in the radial direction is provided on its upper surface. ing. Then, the guide rail 1
1c, the nail gun 2 is slidably supported via two guide pieces 2c, 2c provided on the top surface of the nail gun 2 in an upside down state.

The air cylinder section 11b is a nail gun in which the rear end of the cylinder 11d is connected to the guide plate section 12, and the front end of the piston 11e of the air cylinder section 11b is supported by the support bowl section 11a. It is connected to the rear end surface of 2. Based on this configuration, the horizontal movement mechanism 1
1 is by operating the air cylinder part 11b,
The nail gun 2 can be moved back and forth while being guided by a guide rail 11c.

Further, the guide rail 11c is provided with a limit switch LS4 at its front end and rear end, respectively.
, LS5 (shown in Figure 5) are provided. The limit switch LS4 at the front end of the guide rail 11c detects when the guide piece 2c at the front of the nail gun 2 comes into contact with the limit switch LS4. That is, the limit switch LS4 detects that the nail gun 2 is moving forward and the injection portion 2a is in contact with the wood to be joined. Further, the limit switch LS5 at the rear end of the guide rail 11c is designed to detect when the guide piece 2c at the rear of the nail gun 2 comes into contact with the limit switch LS5. That is, the limit switch LS5 detects that the nail gun 2 is in a backward position and the rotary base 6 can be rotated.

The base portion 6b is provided with two casters 6d on the back surface of its fan-shaped distal end, and supports the base portion 6b rotatably with respect to the bottom plate 4. The rotation of the base portion 6b is restricted by two stoppers 4a and 4b provided on the right and left sides of the base portion 6b on the bottom plate 4. In addition, limit switches LS6 and LS7 (shown in FIG. 5) are provided at the positions of the stoppers 4a and 4b, respectively, so that the base portion 6b is regulated by the stoppers 4a and 4b, and the base portion 6b is regulated by the stoppers 4a and 4b. It is designed to detect that it is in contact with 4a and 4b.

Further, the base portion 6b is provided with a support portion 13 for the drill 1 on the other side edge of its upper surface, which supports the drill 1 in the radial direction with respect to the rotating shaft 5. As shown in FIG. 3, the support base part 13 includes a support base 13a fixed to the upper surface of the base part 6b, and a column erected on the upper surface of the support base 13 to support the drill 1 at a predetermined height. 13b.

The drive section 7 is composed of a mounting section 7a provided protruding from the upper surface of the bottom plate, and an air cylinder section 8 connected with a pin to the mounting section 7a. The air cylinder portion 8 has a rear end portion of the cylinder 8a pin-coupled to the mounting portion 7a so as to be rotatable in the horizontal direction.
The front end of the piston 8b is connected to a connecting piece 6c of the cylindrical portion 6a with a pin that is rotatable in the horizontal direction.

With this configuration, by extending the air cylinder portion 8, the rotating base 6 is rotated to the right in the figure until the base portion 6b comes into contact with the stopper 4a, as shown in FIG. It is now possible to do so. Also, Figure 2
By contracting the air cylinder portion 8 as shown in FIG. 2, the rotating base 6 can be rotated to the left in the figure until the base portion 6b abuts the stopper 4b.

The positions of the drill 1 and the nail gun 2 on the rotating base 6 are the position of the drill 1 when the rotating base 6 abuts the stopper 4a on the right in the figure, and the position of the drill 1 on the rotating base 6. The position of the nail gun 2 is the same as the position of the nail gun 2 when it comes into contact with the stopper 4b on the left side in the figure. FIG. 5 is a schematic diagram illustrating a circuit for sending compressed air to the air cylinder section 8 of the drive section 7, the air cylinder section 11b of the horizontal movement mechanism 11, and the nail gun 2. As shown in FIG.

As shown in FIG.
The compressed air sent from the switching solenoid valves V1, V2, and V3
are sent to the air cylinder sections 8, 11b and the nail gun 2, respectively.

[0031] Then, the nail gun 2 turns on the solenoid valve V1.
By switching from the a1 side to the b1 side, compressed air is sent, the switch of the nail gun is turned on, and a nail is driven. Further, the air cylinder portion 11b of the horizontal movement mechanism 11 is operated by turning off the solenoid valve V2 and
By turning it to the side, compressed air is sent to the front part of the cylinder 11d, causing the piston 11e to retreat and the nail gun to move backward. Then, turn on the solenoid valve V2 and b
By switching to the second side, compressed air is sent to the rear part of the cylinder 11d, the piston 11e moves forward, and the nail gun moves forward.

The air cylinder section 8 of the drive section 7 has a solenoid valve V.
3 to the a3 side, compressed air is sent to the rear of the cylinder 8a and the piston 8b moves forward.
The rotating base 6 rotates until it comes into contact with the stopper 4a. Then, by turning on the solenoid valve V3 and switching it to the b2 side, compressed air is sent to the front part of the cylinder 11d, the piston 11e retreats, and the rotating base 6 rotates until it comes into contact with the stopper 4b. There is.

Switching of these electromagnetic valves V1, V2, and V3 is controlled by a control mechanism (not shown). Next, a nailing process by the automatic nailing device will be described with reference to a graph showing on/off and switching of each limit switch, solenoid valve, etc. shown in FIG.

First, the bottom plate of the nailing device is fixed to a nailing work table, and the wood to be joined is set at the nailing position on the work table. Next, a start button (not shown) of the automatic nailing device is pressed to activate the automatic nailing device. At this time, the rotating base 6 is kept in contact with the stopper 4a of the bottom plate 4 on the right side in the figure, as shown in FIG. That is, the rotating base 6 comes into contact with the limit switch LS6 to keep the limit switch LS6 in the on state.

By pressing the start button, the blades 1b of the drill 1 rotate and the moving mechanism built into the drill 1 is activated. Then, the drill 1 makes three pilot holes in a row vertically in the wood. At this time, the blade 1b of the drill 1...
is set to move forward a preset length corresponding to the nail, then move backward and stop. When the drill 1 stops, it outputs a control signal to the control mechanism.

In response to this signal, the solenoid valve V3 is turned on and switched from a3 to b3, and the air cylinder section 8 of the drive section 7 is turned on.
The piston 8b moves backward, and the rotating base 6 rotates until it comes into contact with the stopper 4b on the left side of the figure, as shown in FIG. At this time, the rotating base 6 separates from the stopper 4a, and the limit switch LS6 is turned off. When the rotating base 6 comes into contact with the stopper 4b, the limit switch LS7 is turned on.

When the limit switch LS7 is turned on, the solenoid valve V2 is turned on and switched from a2 to b2, and the piston 11e of the air cylinder section 11a connected to the nail gun 2 moves forward. The injection part 2a contacts the wood to be joined. At this time, the nail gun 2 is at a height corresponding to the position of the bottom blade 1b of the drill 1, and the injection part 2a comes into contact with the bottom hole of the wood to be joined. It looks like this. The nail gun 2 is in contact with the lowest limit switch LS3 provided on the guide rail 10b of the vertical movement mechanism 10, and the limit switch LS3 is in an on state.

As the nail gun 2 moves forward, the guide piece 2c at the rear of the nail gun 2 separates from the limit switch LS5 at the rear of the guide rail 11c of the horizontal movement mechanism 11, turning off the limit switch LS5. , Next, the guide piece 2c at the front of the nail gun 2 is connected to the limit switch LS4.
The limit switch LS4 is turned on.

When the limit switch LS4 is turned on, the solenoid valve V1 is turned on, switching from a1 to b1, the switch of the nail gun 2 is turned on, and a nail is driven. Also, the timer is activated when the limit switch LS4 is turned on, and the timer is turned off after a predetermined time.
, the solenoid valve V1 returns from b1 to a1, and the solenoid valve V2 returns from b2 to a2. Then, when the nail gun 2 is moved backward by the air cylinder part 11b,
Limit switch LS4 is turned off and limit switch LS5 is turned on. When the limit switch LS5 is turned on at the position indicated by the dotted line m in FIG. 7, the drive motor 10f rotates in the direction of raising the guide plate portion 12 at the position indicated by the dotted line n in FIG. 7, and the nail gun 2 moves upward. .

The nail gun 2 uses the center blade 1b of the drill 1.
When the limit switch LS descends to the position corresponding to
2 and the limit switch LS2 is turned on. When the limit switch LS2 is turned on, the drive motor 10f stops rotating and the solenoid valve V2 is turned on.
2 to b2, and the nail gun 2 moves forward. As the nail gun 2 moves forward, the limit switch LS5 is turned off and the limit switch LS4 is turned on.
becomes.

When the limit switch LS4 is turned on, the solenoid valve V1 is switched to drive a nail, and the timer is activated. When the timer turns off, the solenoid valves V1 and V2 are switched, and the nail gun 2 moves backward. As the nail gun 2 moves backward, the limit switch LS
4 is turned off, and limit switch LS5 is turned on. When the limit switch LS5 is turned on, the drive motor 10f rotates and the nail gun 2 moves up. When the nail gun 2 comes to the position corresponding to the top blade 1b of the drill 1, it contacts the limit switch LS1, and the limit switch LS1 is turned on.

When the limit switch LS1 is turned on, the drive motor 10f stops rotating, and
The solenoid valve V2 switches from a2 to b2, and the nail gun 2 moves forward. Then, as the nail gun 2 moves forward, the limit switch LS5 is turned off and the limit switch LS4 is turned on. Limit switch LS4 is on
As a result, the solenoid valve V1 is switched to drive a nail, and the timer is activated. When the timer is turned off, the solenoid valves V1 and V2 are switched, and the nailer moves backward. As the nail gun moves backward, limit switch LS4 turns off and limit switch LS5 turns on.
becomes.

When the limit switch LS5 is turned on, the drive motor 10f is reversely rotated, and the nail gun 2 is lowered. When the nail gun 2 reaches the position corresponding to the lowest blade 1b of the drill 1, it contacts the limit switch LS3, and the limit switch LS3 is turned on. When the limit switch LS3 is turned on, the solenoid valve V3 is switched from b3 to a3, the piston 8b of the air cylinder section 8 is moved back, the rotating base 6 is returned to the position shown in FIG. 1, and the limit switch LS7 is turned off. , limit switch LS
6 is turned on. In this state, by pressing the start button, the automatic nailing device can start drilling a pilot hole again.

[0044] According to the automatic nailing device of this embodiment, since the pilot hole is drilled and then the nail is driven in, the nail can be driven completely straight. Therefore, the nails will not be bent or not completely driven in due to the effects of the knots and grain of the wood to be joined. can improve the quality of

[0045] Furthermore, when a sizer finish is applied to the wooden panel described above, the circular saw blade will not be damaged by nails that are not completely driven in. Further, according to the automatic nailing device of this embodiment, it is possible to automate the process from drilling the pilot hole to driving the nail, thereby saving labor in nail driving work in factories and the like.

Although the drill 1 is a three-axis drill having three blades 1b, the drill 1 may be configured to have one blade 1b and be movable up and down like the nail gun 2. Further, the number of blades 1b of the drill 1 may be two or four or more. Also. A plurality of nailing machines 2 may be used to drive nails at the same time, or a plurality of nailing machines 2 may be installed.

[0047]

[Effects of the Invention] As described above in detail, according to the automatic nailing device of the present invention, by drilling a pilot hole and then driving the nail, the nail can be driven completely straight. It is possible to perfect the joining of wood, etc., and improve the quality of building materials, etc.

[0048] Furthermore, when performing sizer finishing such as on wooden panels, the sizer finishing saw will not be damaged by nails that are not completely driven. moreover,
Since the process from drilling the pilot hole to driving the nail can be automated, the labor required for nail driving can be reduced.

[Brief explanation of drawings]

FIG. 1 is a plan view of an automatic nailing device of this embodiment.

FIG. 2 is a plan view of the automatic nailing device.

FIG. 3 is a side view of the drill of the automatic nailing device.

FIG. 4 is a side view of the nailing machine of the automatic nailing device.

FIG. 5 is a schematic diagram showing a compressed air supply circuit to the automatic nailing device.

FIG. 6 is a schematic diagram showing the arrangement of limit switches of the vertical movement mechanism of the automatic nailing device.

FIG. 7 is a graph showing the operating state of the automatic nailing device.

FIGS. 8A, 8B, and 8C are cross-sectional views showing nails driven into wood to be joined.

[Explanation of symbols] 1 Drill 2 Nailer 3 Rotation mechanism 4 Bottom plate 5 Rotation axis 6 Rotating base 7 Drive part

Claims (1)

[Claims] [Claim 1] At the position where the nails are driven into the wood, etc. to be joined,
An automatic nailing device that drills a pilot hole in advance and then drives a nail into it, which combines a drill that drills a pilot hole in wood to be joined, a nailer that drives the nail into the wood, and these drills and nailer. and a rotation mechanism rotatably supported by the rotary shaft, and the rotation mechanism includes a rotary shaft erected on a bottom plate fixed to a workbench, etc., and a rotary shaft rotatably supported on the rotary shaft. inserted,
and a rotating base that supports the drill and the nail gun so as to be movable back and forth in a radial direction with respect to the rotating shaft, and a drive unit that rotates the rotating base. Features an automatic nailing device.