JPH04348901A - Automatic nailer - Google Patents

Abstract

PURPOSE:To provide an automatic nailer which does not have such a drawback that when lumber is joined by nails, the latter Is deformed or falls to be perfectly driven under the influence of the wood quality of lumber such as knots and the like. CONSTITUTION:Onto a first and second pillars 15, 16 vertically arranged on a rotating plate 13, a drill 10 and nailer 11 are attached which are movable along these pillars 15, 16. The boring position of the drill 10 and the nailer position of the nailing machine 11 are made equal In its distance from the rotating center of the rotating plate 13. The rotating plate 13 is disposed along the nailing surface of lumber to be joined, and by rotating the rotating plate 13 after making prepared holes on the lumber by the drill 10, the nailer 11 can be moved to each position of the prepared holes.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to an automatic nailing device for driving nails to join wood, etc., and relates to an automatic nailing device for driving a nail after drilling a hole at a nailing position in advance.

0002

2. Description of the Related Art Generally, when joining pieces of wood, etc., the joining is done with nails. When driving nails, a nail gun is used that ejects and drives a nail using the force of compressed air or the like. This nail gun drives a nail, for example, by pressing the tip of the nail gun into a nail-driving position with one hand 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., a worker places the pieces of wood in a predetermined position at the factory and drives the nails with a nail gun. will be repeated. For this reason, care has been taken to prevent workers from inflaming their arms and elbows due to the impact of the nail gun due to frequent use 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 nailer is fixed to a workbench for joining pieces of wood together, and a stopper or the like is installed on the workbench to regulate the position of the pieces of wood to be joined. Automatic nailing devices that automatically drive nails have come into use. 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 is driving a nail by holding a nail gun by hand, if there is a knot in the wood at the nailing position of the wood to be joined. Therefore, you can make a decision such as driving a nail into the area and avoiding that area. However, with the above-mentioned automatic nailing machine, the nails are driven into the wood at a certain position with a certain strength, so that knots in the wood cannot be avoided. If there is a knot at the nailing position of the wood to be joined, as shown in Fig. 4(A), the nail 3 is not driven all the way into the wood 1 and 2 to be joined and remains at the position of the knot 4. If the nail 3 stops and the head of the nail 3 sticks out from the wood 1 and 2, or the nail 3 bends at the knot and the tip of the nail 3 sticks out from the wood 2, as shown in Figure 4 (B). Sometimes it stuck out. If the tip of the nail is bent or the nail is not driven all the way, there is a possibility that the strength of the joint between the timbers 1 and 2 is 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 nails 5, and observed the cross section, as shown in FIG. 4(B). The synthetic resin nail 5 has the wood grains 6 and 7 diagonal to the direction in which the nail 5 is driven, but the nail 5 does not bend in the direction perpendicular to the wood grain. confirmed.

[0008] Further, such deformation of the nails 3 and 5
, 5, etc. cannot be confirmed from the outside unless they are protruded in a visible place, which poses a problem in terms of quality control. The present invention has been made in view of the above circumstances,
The purpose is to provide an automatic nailing device that can drive nails without being affected by the material of the wood to be joined.

[0009]

[Means for Solving the Problems] In order to solve the problems, the present invention provides a drill for drilling a pilot hole in wood to be joined, a nailing machine for driving a nail into the wood, and a combination of these drills and a nailing machine. The rotating mechanism includes a rotating plate that is rotatable along the nailing surface of the wood to be joined, and a rotating mechanism that rotatably supports the machine. a drive unit that rotates the plate; a first support that is erected on the rotation plate and supports the drill movably in the drilling direction; and a second supporting column movably supported in the driving direction, and the drilling position of the drill and the nailing position of the nail gun are arranged at the same distance from the rotation center of the rotating plate. It is something to do.

0010

[Operation] According to the above structure, the nailing device is installed on the nailing surface of the wood to be joined. Next, the drill supported by the first support is activated and moved forward in the drilling direction. As the drill moves forward, a hole is made in the wood to be joined. Next, with the drill retracted, the rotating mechanism rotates the rotating plate by an angle formed by the drill and the nail gun with respect to the center of rotation of the rotating plate. At this time,
Since the drilling position of the drill and the nailing position of the nail gun are equidistant from the stop of rotation of the rotary plate, the nail gun can be moved to the position where the drill was. Then, the nail gun supported by the second support is advanced so that the tip of the nail gun comes into contact with the position facing the hole in the wood, and in this state, the nail gun is operated and the hole in the wood is opened. Drive the nail into position. 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. FIG. 1 shows an automatic nailing device A of this embodiment. As shown in FIG. 1, the automatic nailing device A includes a drill 10, a nailing machine 11, and
0 and a rotating mechanism 12 that rotatably supports the nail gun 11 as a unit.

The drill 10 is a well-known electric drill, and the blade 10a of the drill 10 has the following shapes as shown in FIG.
The diameter of the nail used is slightly smaller than that of the nail 5 to be driven. Note that when drilling a hole in the wood 1 and 2 with the drill 10, the hole is made while pressing the drill 10 against the wood 1 and 2 with a certain amount of force, so the elasticity of the wood 1 and 2 prevents the hole from forming. The hole is drilled in an expanded state, and when the blade 10a of the drill 10 is removed from the hole, the diameter of the hole contracts. Therefore, even if the diameters of the nails 3, 5 and the diameter of the blade 10a of the drill 10 do not differ much, problems will not arise in the joint strength of the nails 3, 5.

The nail gun 11 is a well-known compressed air type nail gun, and compressed air is sent to an air cylinder device (not shown) inside the nail gun 11, and this air cylinder device drives the nails 3, 5 is pressed, and the nails 3 and 5 are driven from the injection part 11b at the tip of the nail gun 11. Further, the nail gun 11 includes an automatic nail feeding device (not shown), and is capable of continuously driving the nails 3 and 5.

[0014] The rotation mechanism 12 connects the pieces of wood 1 to be joined,
a rotating plate 13 that is rotatable along the nailing surface of No. 2; a drive unit 14 that rotates the rotating plate 13; It consists of a first support 15 that supports the nailer 11 freely, and a second support 16 that is erected on the rotating plate 13 and supports the nail gun 11 so as to be movable in the nail driving direction.

The rotating plate 13 is a plate shaped like a disk. The drive unit 14 includes a swing bearing part 17 provided on the outer circumference of the rotating plate 13, and a drive mechanism 18 that drives the swing bearing. The swing bearing part 17 is a well-known bearing, and the outer ring 1
7a, inner ring 17b, and these outer ring 17a and inner ring 17b.
A plurality of ball bodies 17c (
(only one is shown in FIG. 1).

The outer ring 17a is attached to the automatic nailing device A.
This is the part that is fixed to a workbench for creating building components, a manufacturing device for manufacturing building components, etc. Regarding the fixing method, the outer ring may be fixed to the work surface of the work bench from the back side thereof, or a support stand for an automatic nail gun may be provided on the work bench to fix the outer ring. On the other hand, the lower surface of the inner ring 17b is integrally joined to the outer peripheral portion of the rotating plate 13.

The drive mechanism 18 includes a drive motor 18b supported at the tip of an inverted L-shaped arm 18a erected on the upper surface of the outer ring 17a, and a drive motor 18b provided at the tip of the rotating shaft of the drive motor 18b. pinion 18c and the inner ring 1
The rack 18d is provided on the inner peripheral surface of the pinion 7b and meshes with the pinion 18c.

Based on this configuration, the rotation of the drive motor 18b is transmitted through the pinion 18c and the rack 18d, and the inner ring 17b is rotated relative to the outer ring 17a of the swing bearing section 17, thereby causing rotation. The plate 13 is rotatable. Further, the arm 18a includes
A stopper (not shown) and a limit switch (not shown) are provided that protrude from the side surface of the arm 18a toward the center of rotation of the inner ring.

[0019] This stopper has first and second
By contacting the pillars, rotation of the inner ring 17b is restricted and the drill 10 and the nail gun 11 are stopped at predetermined positions. Further, the limit switch stops the drive motor 18b at the same time as the rotation of the inner ring 17b is stopped by the stopper, and also stops the drive motor 18b.
This is to switch the rotation direction of b to the opposite direction.

The first support 15 is formed into a prismatic shape and is vertically erected at a position offset from the center of rotation of the rotating plate 13. Further, the support 15 is provided with a guide rail 15a that guides the drill 10 in a vertically movable manner and is integrally provided with the support 15 along the longitudinal direction of the support 15 on the side surface facing the rotation center of the rotary plate 13. .

The second support 16 is formed into a prismatic shape, and is connected to the first support 15 with the center of rotation of the rotary plate 13 in between.
It is installed vertically in a position facing the A guide rail 16a for vertically movably guiding the nail gun 11 is integrally provided with the support 16 along the longitudinal direction of the support 15 on the side surface on the rotation center side. A mounting portion 10b provided on the side surface of the drill 10 is fitted into the guide rail 15a of the first support column 15 so as to be slidable along the guide rail 15a. On the other hand, the second support 16
A mounting portion 11b provided on the side surface of the nail gun 11 is fitted into the guide rail 16a so as to be slidable along the guide rail 16a.

[0022] These guide rails 15a, 16
The center axis of the blade 10a of the drill 10, which is slidably attached to the nail gun 11 via the attachment parts 10b and 11b,
The central axis of the nails 3 and 5 injected from the injection part 11a of
The positions are equidistant from the center of rotation of the rotating plate 13.

Further, the drill 10 and the nail gun 11 which are slidably attached to the guide rails 15a and 16a,
The direction of the blade 10a and the driving direction of the nails 3 and 5 are determined by the rotating plate 13.
It is designed to be perpendicular to the Further, the blade 10a of the drill 10 is inserted into the position of the rotating plate 13 facing the blade 10a of the drill 10 and the position facing the injection part 11a of the nail gun 11, or the injection part 11a is inserted into the rotating plate 13. 13
Through holes 13a and 13b are provided to protrude from the back surface of the holder.

[0024]The first and second pillars 15,1
At the upper end of 6, opposing side edges of a disk-shaped upper plate portion 19 are joined. This upper plate portion 19 is provided above the rotating plate 13 and parallel to the rotating plate 13. A first air cylinder 20 and a second air cylinder 21 are fixed to this upper plate portion 19.

The first air cylinder 20 has a cylinder portion 20a that fits into the fitting hole 19 provided in the upper plate portion 19.
a, and the tip of the piston portion 20b is connected to the rear end surface of the drill 10. In the second air cylinder 21, the rear end surface of the cylinder portion 21a is connected to the upper plate portion 19.
The tip of the piston portion 21b is connected to the rear end surface of the nail gun 11.

Based on this configuration, the drill 10 has the following features:
Pressed by the first air cylinder 20, the drill 10 moves downward along the guide rail 15a, and the blade 10a of the drill 10 extends through the through hole 13a of the rotary plate 13.
It is designed to make a hole in 2. On the other hand, nail gun 11
is pressed by the second air cylinder 21 and moves downward along the guide rail 16a, and the injection part 11a at the tip of the nail gun 11 protrudes from the through hole 13b of the bottom plate 13 and hits the timbers 1 and 2. It is designed to be in contact with each other.

When using the automatic nailing device A of this embodiment, first align the nailing position and direction on the work table for the process that requires nailing in the manufacturing process of building components for prefabricated houses. The outer ring 17a of the automatic nailing device A is
Keep it fixed. The nailing positions of the timbers 1 and 2 to be joined are aligned with the position of the drill 10. Next, the drill 10 is operated, and the first air cylinder is used to operate the drill 10.
0 to move the drill 10 forward while being guided by the guide rail 15a. Then, with the drill 10,
Holes are made in wood 1 and 2. At this time, the depth of the hole is
The length of the blade 10a of the drill 10 and the first air cylinder 2
It is determined by the stroke of the piston part 20b of 0, but
This is adjusted in advance according to the length of the nails 3 and 5 to be driven. Then, the drill 10 is moved backward by the first air cylinder.

Next, the drive motor 18b is operated to rotate the inner ring 17b via the rack 18d and pinion 18c. At this time, the first support 15 comes into contact with a limit switch attached to an arm 18a that supports the drive motor 18b, so that the drive motor 18b is stopped, and the first support 15 is brought into contact with a stopper provided on the arm 18a. contact and the inner ring 17b stops at a predetermined position.

Next, the second air cylinder 21 is operated to bring the injection part 11a of the nail gun 11 into contact with the pieces of wood 1 and 2 in which the hole has been drilled by the drill 10. Then, the nail gun 11 is operated to drive the nails 3 and 5. At this time, as shown in FIGS. 3(A) and 3(B), holes are made with a drill and nails 3 and 5 are driven into these holes.
Not only iron nails 3 but also synthetic resin nails 5 can be driven without bending.

Then, by rotating the inner ring 17b in the opposite direction and returning the drill 10 to its original position, the nailing operation is continued. At this time, the second support 16 comes into contact with the limit switch of the arm 18a, and the arm 18
The second support 16 comes into contact with the stopper a, and the inner ring 17b
stops and returns the drill 10 accurately to its original position.

According to the automatic nailing device A of this embodiment,
Since the nails 3 and 5 are driven in after drilling the pilot holes, the nails 3 and 5 can be driven straight and completely. Therefore, depending on the knots 4 and grain of the wood 1 and 2 to be joined, the nail 3
, 5 are not bent or the nails 3, 5 are not completely driven in, the wood can be perfectly joined by the nails 3, 5, and the quality of building components etc. can be improved. In addition, when finishing with a sizer like the wood panel described above, nails 3 that are not completely driven in may cause
Will not damage the circular saw blade.

Furthermore, according to the automatic nailing device A 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, etc. be able to.

[0033]

[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.

[0034] Furthermore, when performing sizer finishing on wood panels, etc., 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 perspective view showing an automatic nailing device of this embodiment.

FIG. 2 is a side view of essential parts showing a drill of the automatic nailing device.

FIG. 3 (A) is a partially cutaway side view showing an iron nail driven into wood by the automatic nailing device. (B) A partially cutaway side view showing a synthetic resin nail driven into wood by the automatic nailing device.

FIGS. 4(A), 4(B), and 4(C) are cross-sectional views showing a nail driven into wood by a conventional nailing device.

[Explanation of symbols]

A Automatic nailing device 1 Wood 2 Wood 3 Iron nail 5 Synthetic resin nails 10 Drill 11 Nailer 12 Rotation mechanism 13 Rotating plate 14 Drive section 15 First pillar 16 Second pillar

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 drives a nail after drilling a pilot hole in advance, which includes a drill that drills a pilot hole in wood to be joined, a nailer that drives the nail into the wood, and the drill and the nailer. The rotating mechanism includes a rotating plate that is rotatable along the nailing surface of the wood to be joined, and a rotating mechanism that rotates the rotating plate. a first support that is erected on the rotating plate and supports the drill movably in the drilling direction; and a first support that is erected on the rotating plate and supports the nail gun in the nailing direction. The second movably supported
An automatic nailing device characterized in that the drilling position of the drill and the nailing position of the nailing machine are arranged at the same distance from the center of rotation of the rotating plate.