JP5266924B2 - Stapling nailer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a staple driving machine capable of preventing its contact arm from deformation caused by an impact applied when the machine has dropped and of reducing the expense for replacement. <P>SOLUTION: The staple driving machine is structured so that its nose part 2 to drive each staple by a trigger 5 provided on the machine body is furnished with a driver guide 8 for guiding the front face of a driver 7 sliding inside a nozzle 6 provided in the nose part 2, the guide 8 being arranged slidably up and down, one end of the contact arm is overlapped on the front face over-part of the driver guide 8, the contact arm is extended toward a magazine 3 with the other end coupled with a contact bolt 11 installed on the magazine 3 capable of moving vertically, and the upper part of the contact bolt 11 is put in association with the operation of the trigger 5. In the staple driving machine, the front face upper part of the driver guide 8 is provided with a fitting part where one end of the contact arm is fitted. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a staple driving nail driving machine for driving staples mainly into wood in the fields of architecture and civil engineering.

  In general, a staple nailing machine is configured such that a driver driven by a striking mechanism provided inside a nailing machine body can be slid freely on an injection port of a nose part provided in the lower part of the nailing machine body. While guiding, supplying staples from a magazine provided at the rear of the nose part to the injection port, driving the striking mechanism by pulling the trigger, striking the staples supplied to the nose part by the driver, and wood It is comprised so that it may drive in to-be-placed materials, such as.

  These stapling nailers are equipped with a safety mechanism. For example, as shown in Patent Document 1, a driver guide that guides the front surface of the driver is slidable up and down at the nose portion, and one end of a contact arm is continuously provided laterally from the upper end portion of the driver guide. The contact arm is extended to the magazine side, and the other end is connected to the contact bolt that can be moved up and down on the magazine, and the upper part of the contact bolt is related to the operation of the trigger of the nailing machine body, By pressing the tip against the material to be driven and operating it relative to the nailing machine body, the contact arm and the contact bolt are simultaneously operated in the same direction, and the trigger is effective only when the contact bolt is activated. When the contact bolt does not operate, the trigger operation is invalidated.

By the way, conventionally, when the contact arm is provided on the front upper portion of the driver guide, the driver guide and the end portion of the contact arm are fixed by welding. Thereby, the movement of the driver guide is transmitted to the contact bolt as directly as possible.
2007-245262 publication

  However, an operator may drop the nailer on the floor or the like due to an unexpected cause. When the tip of the driver guide of the nail driver falls downward, the impact of the drop is first received by the driver guide, by the contact arm, and further transmitted to the contact bolt. Since the movement of the driver guide is rapid, the contact bolt cannot faithfully follow the rapid movement. Since the driver guide and the contact bolt that operate vertically move relative to each other, the contact arm that connects the driver guide and the contact bolt receives a force to rotate. At this time, the driver guide and the contact arm are integrally welded and fixed, and the driver guide itself has high strength so that it will not be deformed or damaged, but the contact arm made of sheet metal is inferior in strength. A large force is applied to the contact bolt, and stress concentrates on a part of the contact bolt and deforms. As a result, the contact arm may be locked and malfunction may occur.

  If a malfunction occurs, the deformed parts must be replaced, but the contact arm and driver guide are welded, so even if only the contact arm is deformed, the driver guide must be replaced together. There was a problem that the replacement cost was expensive.

  It is an object of the present invention to provide a staple nailing machine that solves the above-mentioned problems, prevents deformation of the contact arm due to an impact generated when the nailing machine is dropped, etc., and can reduce replacement costs. And

In order to solve the above-mentioned problem, the invention according to claim 1 is configured such that a driver guide that guides the front surface of a staple driving driver that slides in an ejection port of a nose portion is slid up and down on a nose portion that drives a staple by a trigger operation. One end of the contact arm is placed on the front upper part of the driver guide, the contact arm is extended to the magazine side, and the other end is connected to a contact bolt that can be moved up and down on the magazine. A stapling nailing machine, the upper part of which is related to the operation of the trigger of the nailing machine body, is formed with a fitting portion for fitting one end of the contact arm on the upper front surface of the driver guide, Protrusions are formed on the top and bottom, and one end of the contact arm is fitted between these protrusions, The displacement or the other and the one end of the contact arm, characterized in that the formation of the engagement portion to prevent the positional deviation to the left and right together.

  According to the first aspect of the present invention, since the fitting portion into which one end of the contact arm is fitted is formed on the front upper portion of the driver guide, the vertical coupling between the driver guide and the contact arm is not impaired. Therefore, the vertical movement of the driver guide at the start and end of staple driving is reliably transmitted to the contact arm. Even if the driver guide suddenly operates due to an impact when the nailing machine falls on the floor or the like, the driver guide and the contact arm are not integrated, and at this time the force that rotates the contact arm However, since the contact arm is fitted with the contact arm on the front surface of the driver guide, the contact arm can be easily rotated and is not easily deformed. Therefore, deformation of the contact arm can be effectively prevented. Even if the contact arm is deformed, only the contact arm needs to be replaced. Therefore, the number and cost of replacement can be greatly reduced.

In addition , since the protrusions are formed vertically on the front upper portion of the driver guide and one end of the contact arm is fitted between the protrusions, the same effect as the effect according to claim 1 can be obtained. Can do.

In addition , since either one of the upper and lower protrusions of the driver guide and one end of the contact arm are formed with an engaging portion that prevents displacement from side to side, the driver guide and the contact arm operate integrally. Will be even more certain.

  FIG. 1 is a perspective view of a staple driving nail driver. In FIG. 1, reference numeral 1 denotes a nailing machine body. A nose part 2 for driving out staples is provided at the lower part of the nailing machine body 1, and a grip 4 and a magazine 3 are provided at the rear part of the nailing machine body 1. Reference numeral 5 denotes a trigger for activation. The nail driver main body 1 is provided with a striking mechanism using air pressure as a drive source, but these may be well-known and are omitted here.

  As shown in FIGS. 2, 3, and 4, an injection port 6 is formed in the nose portion 2. The ejection port 6 slidably accommodates a staple driving driver 7 constituting an impact mechanism. The front wall of the ejection port 6 is constituted by a driver guide 8. The driver guide 8 is urged so as to always move downward by a spring (not shown). The driver guide 8 slidably guides the front surface of the driver 7, but at the same time, the driver guide 8 itself is also slidably provided in the nose portion 2 in the vertical direction (driving direction) to constitute a safety mechanism.

  That is, the safety mechanism includes a driver guide 8, a first contact arm 10, a contact bolt 11, and a second contact arm 12. Two protrusions are formed on the upper front surface of the driver guide 8 in the vertical direction. One end (front end) 10 a of the first contact arm 10 is fitted between the upper and lower protrusions 13 and 14 and is mounted on the driver guide 8 so as to overlap. Part of the upper protrusions 13 and 14 protrudes downward, and the protrusion 15 is engaged with an engagement groove 16 formed on the upper edge of the first contact arm 10. For this reason, the first contact arm 10 and the driver guide 8 operate integrally in the vertical and horizontal directions. A slight clearance is formed between the protrusions 13 and 14 and the one end 10a of the contact arm 10 so as not to affect the operation.

  One end 10a of the first contact arm 10 extends to the side of the driver guide 8 and further extends to the magazine 3 side. Then, the other end 10 b of the contact arm is screwed into a middle thread portion of the contact bolt 11. The contact bolt 11 is provided on a guide portion 17 formed on the outer surface of the magazine 3 and a bolt receiving portion 18 on the guide portion 17 so as to be vertically movable. As shown in FIG. 5, the upper portion of the contact bolt 11 is connected to the second contact arm 12 via a plurality of members, and the upper end 12 a of the contact bolt 11 can be engaged with a contact lever 20 that is provided rotatably on the trigger 5. Is provided.

  An adjustment dial 21 is provided at the upper end of the contact bolt 11. When the adjustment dial 21 is rotated, the contact bolt 11 is rotated, so that the first contact arm 10 is screwed and moved in the vertical direction, and the driver guide 8 is also moved in the vertical direction. Thereby, the driving depth of staples can be adjusted. An engagement groove 26 (see FIG. 4) is formed at the lower end of the threaded portion of the contact bolt 11, and the E groove 25 is engaged with the engagement groove 26 to define the bottom dead center of the first contact arm 10. Yes. In FIG. 4, the E-tome 25 is omitted.

  According to the safety mechanism described above, when the staple 8 is pressed against the material to be driven when the staple is driven, the driver guide 8 moves upward relative to the nail driver main body 1 as shown in FIG. Since it moves, the first contact arm 10 moves upward. At this time, since the projecting piece 15 of the driver guide 8 is engaged with the engagement groove 16 of the first contact arm 10, the left and right movements of the first contact arm 10 are prevented. The contact bolt 11 is sufficiently transmitted to the first contact arm 10. As a result, the contact bolt 11 and the second contact arm 12 also move upward. When the second contact arm 12 moves up, the upper end of the second contact arm 12 rotates the contact lever 20 upward, and the contact lever 20 approaches the valve stem 23 of the trigger valve 22. When the trigger 5 is pulled and rotated in this state, the contact lever 20 can push the valve stem 23 to operate the trigger valve 22. When the trigger valve 22 is operated, the striking mechanism is operated and staples can be driven.

  On the other hand, when the trigger 5 is pulled and operated without pressing the driver guide 8 against the workpiece, the contact lever 20 rotates upward, but the amount of movement is not sufficient, so the valve stem 23 of the trigger valve 22 is not sufficient. Cannot be pushed in. In this case, the nailer does not start.

  As described above, the protrusions 13 and 14 are formed vertically on the front upper portion of the driver guide 8, and the one end 10 a of the first contact arm 10 is fitted between the protrusions 13 and 14. Thus, the vertical coupling between the driver guide 8 and the first contact arm 10 is not impaired. Therefore, the vertical movement of the driver guide 8 at the start and end of staple driving is reliably transmitted to the contact arm.

  Further, since the protrusion 15 of the upper protrusion 13 of the driver guide 8 is engaged with the engagement groove 16 at one end of the contact arm so as not to be displaced from each other right and left, the driver guide 8 and the first contact arm 10 Integral operation of is even more reliable.

  By the way, when the nailing machine having the above configuration drops the driver guide 8 on the floor with the tip of the driver guide 8 facing down for some reason, the driver guide 8 first receives the impact of the drop, and the driver guide 8 suddenly moves upward. Operate. This operation is transmitted to the first contact arm 10 and further to the contact bolt 11. Since a clearance is provided between one end 10a of the first contact arm 10 fitted between the upper and lower protrusions 13 and 14 of the driver guide 8, a part of the impact received by the driver guide 8 is Absorbed by clearance. The portion that cannot be absorbed is transmitted from the first contact arm 10 to the contact bolt 11 and acts as a force for deforming the contact bolt 11. Since the contact bolt 11 is guided by a pair of left and right guide portions 17 and an upper bolt receiving portion 18, it cannot tilt. For this reason, a force is intensively applied to the engagement groove 26 of the E-tme 25, which is the smallest and weakest part of the contact bolt 11, and the contact bolt 11 is bent or bent from here. When the contact bolt 11 is broken, the safety mechanism does not operate, so that there is no inconvenience that the nailer is started by mistake.

  As described above, even if the nailing machine is dropped unexpectedly due to carelessness or the like, the driver guide 8 has high strength and the first contact arm 10 can absorb the impact, and thus is damaged. Or the possibility of deformation. Therefore, it is only necessary to replace the contact bolt 11 when it is broken. Even if the driver guide 8 is deformed, it is not necessary to replace the first contact arm 10. Therefore, the number of exchanges and costs can be greatly reduced.

  In short, the driver guide 8 and the one end 10a of the first contact arm 10 may be configured so that the first contact arm 10 rotates smoothly when the first contact arm 10 rotates upon receiving an impact. For that purpose, the driver guide 8 and the first contact arm 10 may be configured to fit in the front-rear direction. Therefore, the mode of fitting is not limited to the above embodiment.

  In addition, the mode in which the driver guide 8 and the first contact arm 10 are not displaced from side to side is not limited to the above-described embodiment.

A perspective view of one embodiment of a staple nailing machine Front view of the main part of the nailing machine Side view of the main part of the nailing machine Sectional drawing on the XX line of FIG. The perspective view which shows the 2nd contact arm and its circumference Operational diagram of the second contact arm during staple driving

s Linked staple 1 Nailer body 2 Nose part 3 Magazine 7 Driver 8 Driver guide 10 Contact arm (first contact arm)
11 Contact bolt 13, 14 Projection 15 Projection piece 16 Engagement groove

Claims (1)

A driver guide that guides the front surface of the staple driving driver that slides in the injection port of the nose portion is slidable up and down at the nose portion that drives the staples by trigger operation. And the contact arm is extended to the magazine side, the other end is connected to a contact bolt that can be moved up and down on the magazine, and the upper part of the contact bolt is related to the operation of the trigger of the nailing machine body. In the nailing machine,
Forming a fitting portion into which one end of the contact arm is fitted on the front upper portion of the driver guide ,
Protrusions are formed vertically on the front upper part of the driver guide, and one end of the contact arm is fitted between these protrusions,
A stapling nailing machine characterized in that an engaging portion is formed on one of the upper and lower protrusions and one end of the contact arm so as to prevent displacement from each other .

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