JP2000218566A - Nail holding structure in nail feeder for nailing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent damage to a magnet by a head part of a driven nail abutting to the magnet, in a nailing machine positioning the nail in a shooting port, striking the nail by a driver, and driving the nail. SOLUTION: This machine is constituted such that a magnet 20 is mounted in a base board 11 of a nail feeder 10 to hold a second nail n2 of a connection nail N attracted by the magnet 20. In this constitution, in addition to that durability of the magnet 20 can be enhanced, floating of second/third nails n2, n3 from the base board 11 is prevented, so that a door 12 can be surely closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a nail holding structure for holding a nail at a predetermined position in a nail feeder of a nail driver.

[0002]

2. Description of the Related Art In a nailing machine of the type in which a number of nails are connected in parallel and fed one by one to an injection path by a nail feeder and hit, the nails are fed into the injection path by a nail feeder. Conventionally, to hold the first nail in a predetermined position, a magnet was attached to a predetermined position in the injection path,
The first nail was directly sucked and held by this magnet.

[0003]

Therefore, the conventional nail holding structure has the following problems. First, the setting of the connecting nail into the nail feeder is carried out in such a manner that the second nail is hooked on the nail feed nail normally located at the advance end at the time of setting. In this way, in order to set the connecting nail based on the second nail based on the relationship with the forward end position of the nail feeding nail and the like, when the connecting nails having different pitches are loaded, the first nail is moved against the magnet in the injection path. The position varies (2
Because the position of the second nail is constant), the nail cannot be securely held by the magnet, and as a result, there is a problem that it is difficult to set the connecting nail. Second, since the magnet is mounted in the injection path, the head of the nail that has been hit passes while contacting the magnet, and as a result, there is a problem that the magnet is easily damaged. Third, although the first nail is held in position by the magnet in the injection path, the second and third nails are not directly affected by the restraining force for holding the position by the magnet. The nail feed passage is easily lifted from the substrate side. As a result, when closing the door of the nail feed passage, for example, a check nail attached to the door side interferes with the third nail of the connecting nail, and the door is snapped. In some cases it was not possible to close. An object of the present invention is to provide a nail holding structure free from these problems.

[0004]

Therefore, the present invention provides a nail holding structure having the structure described in each of the claims. Claim 1
According to the described nail holding structure, since the second nail, which is a reference for setting the nail feeding device, is directly sucked and held by the magnet, the second nail is fixed to the magnet regardless of the pitch of the connecting nail. On the other hand, it is always held at the same position by suction, so that the setting of the connecting nail can always be carried out reliably and easily. Also, since the second nail is sucked and held by the magnet instead of the first nail sent into the injection path, the head of the nail (first nail) hit as in the prior art comes into contact with the magnet. Therefore, the magnet can be prevented from being damaged, and the durability of the nail holding structure can be improved. Furthermore, since the second nail is directly sucked and held instead of the first nail as in the conventional case, the lifting of the second and third nails from the nail feed passage (substrate) is significantly larger than in the conventional case. For example, the check nail and the connecting nail of the nail feeder can be reduced.
The interference with the second nail can be eliminated, and the door of the nail feed passage can be always closed.

[0005]

FIG. 1 shows an embodiment of the present invention.
A description will be given based on FIG. FIG. 1 shows the periphery of a nail feeder 10 of a nail driver. In the figure, reference numeral 1 indicates a main body of the nailing machine. In the figure, only a part of the lower end side of the main body 1 is shown. Although not shown, the main body 1 includes a cylinder and a piston which are operated by compressed air, and a nail driver is attached to the piston. This driver is guided so as to be able to move up and down on the inner peripheral side (injection path 4) of a driver guide 2 provided in a projecting manner from the lower surface of the main body 1. A contact arm 3 is mounted on the outer peripheral side of the driver guide 2 so as to be vertically movable. The pulling operation of the trigger (not shown) on the main body 1 side becomes effective by the upward movement operation of the contact arm 3.
A nail feeder 10 is mounted on the outer peripheral side of the driver guide 2. With this nail feeder 10, the connecting nail N
Is sent toward the injection path 4 one pitch at a time. The connecting nail N is fed by one pitch, and the first nail n1 is sent to the driver guide 2
When the piston and the driver are moved downward by pulling the trigger in a state where the nail n1 is located in the injection path 4, the head of the first nail n1 is hit by the tip of the driver, and the nail n1 is driven by the driver guide. 2 (emission port 2a).

[0006] The first nail n1 is fed into the injection path 4 through a nail insertion port 2b formed in a predetermined range along the axial direction of the driver guide 2. The nail feeder 10 is connected to the injection path 4 via the nail inlet 2b. On the right side of the nail feeder 10 in the figure, a nail magazine 6 for loading the connecting nail N is attached. Nail feeder 10
Functions to feed the connecting nails N pulled out of the nail magazine 6 toward the injection path 4 one pitch at a time (toward the left side in the figure). The nail feeder 10 includes a substrate 11 and a door 12 that is opened and closed with respect to the substrate 11. The door 12 is rotatably supported by a driver guide 2 via a support shaft 13. When the door 12 is closed, a gap is formed between the door 12 and the substrate 11, and this gap becomes a nail feed passage 11a for feeding the connecting nail N.

Although not shown, a nail feeding cylinder as a driving source of the nail feeding device 10 is mounted on the back side of the substrate 11. This nail feed cylinder operates on the pull-in side (anti-nail feed side) by the compressed air supplied to the rod side, and operates on the protruding side (nail feed side) by the compression spring interposed on the head side when the rod side is depressurized. This is a single-acting air cylinder that operates in conjunction with the nailing operation of the main body 1. That is, the rod side of the nail feed cylinder is communicated with the return air chamber of the main body 1 (a chamber to which compressed air is supplied when the impact piston moves down). When the impact is completed, compressed air is supplied to the rod side of the nail feed cylinder, whereby the nail feed cylinder operates to the retracting side. On the other hand, when the compressed air in the return air chamber is consumed by the upward movement of the piston and the return air chamber is depressurized, the rod side of the nail feed cylinder is also depressurized, whereby the nail feed cylinder is protruded by the compression spring on the head side. Acting on the side.

When the nail feed cylinder is moved to the protruding side, the forked nail feed claws 14 attached to the tip of the rod move to the nail feed side (left side in the figure). As shown in FIG. 1, the two nail feed claws 14 are arranged at predetermined intervals in the nail axis direction, and the nail feed passage 11 passes through two windows 11 c formed on the substrate 11.
is protruded into a. Each nail 14 has a first claw portion 14a on the front side in the nail feeding direction and a second claw portion 14b on the rear side in the nail feeding direction. Nail feeding claw 14, 14
Is spring-biased in a direction to protrude into the nail feed passage 11a, and when moving toward the nail feed side, is protruded into the nail feed passage 11a through the windows 11c, 11c by the spring biasing force. When protruding into the nail feed passage 11a, the first
The third nail n3 is captured between the second nail portions 14a and 14b, and moves to the nail feed side in this state, whereby the connecting nail N is fed by one pitch of the nail (the third nail n3 becomes the second nail n3). The first nail n1 to be hit next is thrown into the injection path 4. On the other hand, when the nail feeding cylinder is operated to the retracting side, the nail feeding claws 14, 14 are retracted toward the back side of the substrate 11 against the spring biasing force and withdraw from the nail feeding passage 11a. Side (right side in FIG. 1) by one pitch of nail
And the next nail (third nail n) between the second nails 14a and 14b.
Capture 3). In conjunction with the nailing operation on the main body 1 side, the nail feeder 10 repeats the above operation, whereby the connecting nails N are fed one pitch at a time.

A check claw 1 is provided beside the two nail feed claws 14, 14.
6, 16 are arranged in a spring-biased state. The check nails 16 prevent the connecting nail N from moving toward the non-nail feeding side when the nail feeding nails 14 retreat. When fed in the feed direction, the connecting nail N is allowed to move in the nail feed direction by retreating from the nail feed path 11a against the bias of the spring. A nail head guide groove 11b is formed on the upper surface of the substrate 11 along its upper edge. The connecting nail N
With the heads of the nails n to n dropped into the nail head guide grooves 11b and positioned in the nail axis direction, the nail feed passage 1
1a is sent toward the injection path 4.

Next, on the upper surface of the substrate 11 where the second nail n2 is located, a magnet 2 for holding the nail is provided.
0 is attached. This magnet 20 has a disk shape, and as shown in FIG.
1b is adhered to the accommodation hole 21 formed on the bottom surface with its upper surface substantially aligned with the bottom surface, and is fixed in the accommodation hole 21 in a fitted state. Also, in the accommodation hole 21,
A lid 22 of substantially the same shape is fitted on the back side (lower side) of the magnet 20 to prevent the magnet 20 from falling off. This magnet 20 allows the connecting nail N
The head of the second nail n2 is directly sucked and held, whereby
The third nail n1 is held at a predetermined position of the injection path 4, and the third nail n3 and the subsequent nails n to n are attracted to the bottom side (the lower side in the figure) of the nail feed passage 11a.

According to the nail holding structure of the present embodiment configured as described above, the second nail n2 serving as a reference for setting the nail feeder 10 is held by suction by the magnet 20, so that the connecting nail N Regardless of the pitch, the second nail n2 is always sucked and held at the same position with respect to the magnet 20, so that it is possible to always reliably hold the nail.
Consequently, the setting of the connecting nail N can be performed reliably and easily. Further, since the second nail n2 is sucked and held by the magnet 20 instead of the first nail n1 sent into the injection path 4, the head of the nail hitting the magnet 20 does not come into contact. Thereby, the magnet 2
0 can be prevented, and the durability of the nail holding structure can be improved.

Further, since the second nail n2 is directly sucked and held instead of the first nail n1 as in the prior art, the nail feed passage 11 for the second and subsequent nails n2, n3,.
a (substrate 11) can be greatly suppressed from rising as compared with the related art, so that the door 12 of the nail feed passage 11a can be always closed. When the connecting nail N rises from the base plate 11, its head is disengaged from the nail head guiding groove 11b, so that the connecting nail N is not positioned in the nail axis direction.
(Especially the head) may be caught between the substrate 11 and cannot be closed.

Also, the last nail n of the connecting nail N is the second nail n
When the first nail n1 is hit in the state where it is positioned as 2, the last nail n2 is not connected to the front and rear nails n1 and n3, and thus its position becomes unstable. In this state, when return air (compressed air supplied to the lower piston chamber to move the striking piston upward) is blown out from the main body 1 through the driver guide 2, the last nail n2 is displaced. It was causing nail clogging. Conventionally, to solve this problem, for example,
As disclosed in JP-A-48484, there has been provided a configuration in which a nail for preventing nail protrusion is provided below the check nail and the position of the last nail n2 is held by the protrusion for preventing nail protrusion. However, according to the nail holding structure of the present embodiment, since the last nail N2 (second nail n2) of the connecting nail N is directly sucked and held by the magnet 20, the special position holding as in the above-described conventional case is performed. Without any means,
Nail clogging can be prevented and the last nail n2 can be reliably fed into the injection path 2.

Various modifications can be made to the embodiment described above. For example, in the nail feeder 10 illustrated in FIG. 1, the check claws 16 and 16 are provided on the substrate 11 side. However, as another form, a check claw can be provided on the door 12 side. To the connecting nail N (especially the third nail n
3) The floating of the door 12 is prevented by preventing the
Can be reliably closed, and the effect of the present invention is great.

In the illustrated embodiment, the magnet 2
0 is set at the head of the nail n2, for example, the second nail n2
May be arranged near the center of the nail shaft. In short,
The conventional various problems can be solved by disposing a magnet to directly attract and hold any part of the second nail n2 on the near side in the feeding direction, not the first nail n1 located in the injection path 4. be able to. Therefore, if the magnet is at a position for directly sucking and holding the second nail n2,
You may arrange in two or more places.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention, and is a plan view in a state where a door of a nail feeder is opened.

FIG. 2 is a sectional view taken along the line (2)-(2) of FIG. 1 and showing a position of a magnet with respect to a connecting nail. In this drawing, the door of the nail feed passage is not shown.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Nail driver main body 2 ... Driver guide 4 ... Ejection path 10 ... Nail feeder 11 ... Substrate 11a ... Nail feed path, 11b ... Nail head guide groove, 11c ...
Window 12 ... Door 14 ... Nail feeding claw, 16 ... Check claw 20 ... Magnet 21 ... Housing hole 22 ... Lid N ... Connecting nail n1 ... First nail, n2 ... Second nail (last nail), n3
... the third nail

Claims (2)

[Claims] 1. A nailing machine for feeding a plurality of nails connected in parallel to each other in an injection path one by one by a nail feeder and striking the nails to maintain a position of the connecting nails in the nail feeder. A nail holding structure in a nail feeder of a nailing machine, wherein a magnet is attached to a substrate of the nail feeder, and the magnet is used to suck and hold a second nail of the connecting nail. 2. The nail holding structure according to claim 1, wherein
A nail holding structure in a nail feeder of a nailing machine, wherein a magnet is arranged at the position of the head of the third nail.