JP4296599B2 - Nailer with magazine unit - Google Patents

Description

The present invention relates to a nailing machine having a magazine unit for driving a connecting nail in which a large number of nails are connected in parallel in a plate shape.

  A magazine unit of a nailing machine for driving a connecting nail in which a large number of nails are connected in parallel in a plate shape is disclosed in Patent Document 1. This magazine unit prevents the tip of the nail head holding bar from being caught by the connecting nail and the head of the second nail at the position next to the leading nail placed in the nose driving passage is sufficiently pressed. Instead, the second nail is struck by the driver at the same time as the top nail and attempts to solve the problem of clogging in the driving path. The magazine unit has a nail head presser bar on the magazine cover, and a nail head presser bar and a detachable cam member are fixed to the magazine base. The cam member is located at the rear side of the magazine base, and when the magazine cover is slid from the rearmost position of the magazine base, the nail head presser bar engages with the cam member and the connecting nail accommodated in the magazine base moves to the magazine cover side. Therefore, it is possible to get over the rear nail shaft portion of the connecting nail and prevent it from being caught by the rear nail. Further, when the magazine cover is closed, the nail head presser bar is released from the engagement of the engaging portion, and the head of the second nail at the position next to the leading nail can be sufficiently pressed. As a result, the tip of the nail head presser bar is prevented from being caught by the connecting nail, and the second nail in the next position is struck by the driver at the same time as the top nail and the problem of clogging in the driving passage is eliminated.

Japanese Utility Model Publication No. 6-42076

  In the magazine unit described in Patent Document 1 above, as shown in FIGS. 12 and 13, when a connecting nail with a small number of connections is loaded, the magazine cover has a sliding distance from the rear position of the magazine base. At this time, the nail head presser bar is separated from the cam member, and the tip of the nail head presser bar comes into contact with the magazine base. For this reason, when closing the magazine cover, the nail head presser bar rides on the rear nail shaft portion of the connecting nail and closes it.

  Since the conventional finished nail has a thickness of about 1 mm or more, there is no problem in climbing and closing the nail shaft of the rear end of the connecting nail by providing a certain tapered surface at the tip of the nail head holding bar. When the magazine cover is closed, the nail head presser bar can sufficiently hold the head of the second nail next to the top nail. However, in the case of a thin nail with a thickness of about 0.85 mm or less, especially about 0.6 mm, which is said to be a pin nail as shown in the figure, a connecting nail is attached to the tip of the nail head holding bar. If a certain taper surface is provided to get over the rear nail shaft, the head of the second nail at the next position of the top nail cannot be pressed sufficiently, and the second nail at the next position However, there is a drawback in that a trouble occurs that the ball is struck by the driver at the same time as the leading nail and clogs in the driving passage.

The object of the present invention is to eliminate the above-mentioned conventional disadvantages, and even when a thin nail having a thickness of 0.6 mm, such as a pin nail, is loaded with a small number of coupling nails, the nail is loaded to remove the magazine cover. When closed, the tip of the guide bar that holds the nail head is prevented from being caught by the tail of the connecting nail, and the head of the second nail next to the top nail can be pressed sufficiently, It is an object of the present invention to provide a nailing machine having a magazine unit that prevents clogging of nails in an inner driving passage.

In order to achieve the above-mentioned object, the present invention hits a cylinder disposed in a housing, a piston that can slide up and down in the cylinder, and a nail that is connected to the piston and is in a nose driving passage. A nailing machine comprising a screwdriver and a magazine unit for receiving a connecting nail and sending a leading nail of the connecting nail to the driving passage in the nose, wherein the magazine unit is connected to the nose A magazine base and a space for accommodating the connecting nail between the magazine base, and a longitudinal direction of the magazine base between a closed position for accommodating and holding the connecting nail and an open position where the connecting nail can be loaded. The magazine cover is slidably attached to the magazine cover, and is accommodated in the magazine cover so as to be movable in the nail feed direction of the magazine cover and in contact with the magazine base. And at least one of the nose side portion of the guide bar and the magazine cover that contacts the guide bar, a tapered surface is provided, and the magazine cover is closed from the open position. When the magazine cover is in the open position, the guide bar is held at a position separated from the magazine base by sliding the guide bar along the tapered surface when moving to the position. One feature is that the guide bar is moved to a position close to the magazine base when the cover is in the closed position .

  In the magazine unit according to the present invention, the guide bar can be moved in the magazine base side and the nail feed direction, the back and rear of the guide bar are urged by a spring, and the protrusion of the guide bar and the magazine cover are engaged. When the magazine cover is open, the guide bar and the magazine cover are engaged, and the guide bar is retracted to the magazine cover side to have a non-contact gap with the magazine base. When the magazine cover moves to the closed position, the tip of the guide bar can slide with a gap between it and the base surface of the magazine base. Even if there is no taper surface, R surface or the like, it is possible to get over the nail shaft portion of the connecting nail in the magazine base. In addition, since the guide bar keeps a gap on the base surface of the magazine base until just before the magazine cover is closed, the tip of the guide bar is connected to the back of the connection nail even when the number of connections is small and the connection length is very short. It can be prevented from being caught on the nail shaft at the end. Also, when the magazine cover is closed, there is no taper surface etc. for getting over the nail shaft at the tip of the guide bar, so when the tip is received in the insertion port of the nose, the next position of the leading nail The head of the second nail and the entire nail head behind it can be pressed down sufficiently, and the second nail in the next position is hit by the driver at the same time as the top nail and clogs in the driving path Can also be eliminated.

As a result, the diameter of the head and shaft of the nail, generally called a pin nail, is the same diameter, the thickness is about 0.85 mm or less, and a large number of nails are connected in a plate shape in parallel. Even in the case of a connecting nail formed in a sheet shape, a thin nail with a diameter of about 0.6 mm, or a nail when the connection is short, it is easy to load, and the position next to the top nail The presser of the head of the second nail and the head of the nail in the vicinity thereof can be securely pressed.
Then, a convex portion is formed at the tip of the guide bar, and a taper surface and an engaging portion are only formed by plastic molding on the corresponding magazine cover, and parts such as a cam member are not required, so the number of parts increases. This can contribute to a reduction in the cost of the nailer and a reduction in the size of the nailer.

An embodiment of the magazine unit of the nailing machine of the present invention will be described with reference to FIGS.
As shown in FIG. 1, a nailing machine having a magazine unit 2 includes a housing 3 that accommodates compressed air therein, a handle 6 provided in the housing 3, and a compressed air supply port 7 at one end of the handle 6. A cylinder 10 is provided in the housing 3 and a driver 13 integrated with a piston 11 that can slide up and down in the cylinder 10 is incorporated. As is well known, the piston 11 is driven to move up and down by operating a trigger valve 15 provided on the handle 6.

  In the nail driving operation, the trigger valve 15 is operated by operating the trigger 17, the compressed air inside the housing 3 is supplied to the upper surface of the piston 11, the piston 11 is suddenly moved down in the cylinder 10, and the piston 11 The nail in the driving passage 14 of the injection unit 9 is hit by the connected driver 13 and driven into the driving object.

  The nail used in the nail driver 1 of the present invention is a connection nail formed in a sheet shape by connecting a large number of nails in parallel in a plate shape, and is generally called a pin nail. A plurality of thin nails having substantially the same diameter and a thickness of about 0.8 mm to 0.6 mm are connected to each other in a plate shape connected in parallel by an adhesive or the like. . The connecting nail is accommodated in the magazine unit 2 fixed to the injection portion 9 substantially parallel to the handle 6, and sent from the magazine unit 2 through the nose 5 so that the leading nail enters the driving path 14.

  The magazine unit 2 accommodates a sheet-like connecting nail, and between the magazine base 18 and the magazine base 18 connected to the nose 5 so as to send the leading nail of the connecting nail to the driving passage 14 in the nose 5. A space for accommodating the connecting nail is formed, and the magazine cover 21 is slidably mounted in the longitudinal direction of the magazine base 18 between a closed position for receiving and holding the connecting nail and an open position where the connecting nail can be loaded. The

  1 to 5, the magazine cover 21 is in a closed position, and forms an elongated space for accommodating a connecting nail between the magazine base 18. The magazine base 18 has shafts of the connecting nail having various lengths. The connecting nail can be accommodated. As shown in FIG. 1, the connecting nail 23 indicates the longest usable nail (for example, 45 mm is shown), and extends long so that the leading nail is positioned in the driving passage 14 of the nose 5. ing.

  The connecting nail 22 shown in FIG. 2 is a connecting nail having a shaft portion shorter than the longest usable connecting nail 23 (for example, 35 mm). The longest nail connecting nail 23 and the other short connecting nail 22 are selectively used, and both can be loaded into the magazine base 18 respectively. The magazine base 18 is formed with a nail foot guide groove 24 for receiving and guiding the nail foot tip of the connecting nail, and forms a part of the receiving space of the connecting nail. The magazine base 18 is fixed so that the end of the nose 5 side is integrated with the driving passage 14 portion of the nose 5 so that the leading nail of the connecting nail is sent to the driving passage 14.

  On the upper and lower edges of the magazine base 18, guide grooves for allowing the magazine cover 21 to slide in the longitudinal direction are formed as guide grooves 27 and guide grooves 25 in parallel with the connecting nails, respectively. The cover 21 has an upper edge portion and a lower edge portion formed as guide portions that are received in the guide groove 27 and the guide groove 25 of the magazine base 18. The cover 21 forms a space for accommodating and holding the connecting nail on the magazine base 18. It is slidably mounted in the longitudinal direction of the magazine base 18 between the position and the open position where the connecting nail can be loaded.

  The magazine cover 21 is formed with an elongated space of approximately the same length as the connecting nail between the magazine base 18 so as to accommodate and hold the connecting nail in the closed position. Further, a lock claw 29 is provided at the rear end of the magazine cover 21 between the closed position and the open position, and when the magazine cover 21 is in the closed position, it engages with an edge of a lock hole (not shown) of the magazine base 18. At the same time, the magazine cover 21 is locked in the closed position, and the closed position is maintained. As best shown in FIG. 5, the lock claw 29 is pivotable about the pin 30 and is urged to the lock position by the lock spring 31, and the rear end of the lock claw 29 against the lock spring 31. By pressing, the magazine cover 21 can be unlocked.

  As shown in FIGS. 2 to 6, in the space for accommodating and holding the connecting nail between the magazine base 18 and the magazine cover 21, the last nail of the connecting nail is pressed to place the leading nail of the connecting nail in the nose 5. A pusher 33 that constantly urges the driving passage 14 is provided. The pusher 33 is slidably mounted in the nail feed direction while being guided along a pusher guide groove 35 provided in the nail feed direction of the magazine base 18. A pusher piece 56 disposed on the magazine base 18 side and integrated with the pusher 33 slides from the rear end of the magazine base 18 while sliding in the pusher guide 55 disposed in the opening 18 c of the magazine base 18. The extending pusher spring 34 is urged to reach the position of the driving passage 14 in the nose 5.

  As shown in FIG. 3, the pusher guide 55 opens simultaneously with the magazine cover 21 when the magazine cover 21 is opened, guides the pusher spring 34 inside thereof, and closes when the magazine cover 21 is closed. A pusher spring 34 is provided to ensure that the pusher 33 can be urged.

  On the base surface 18a of the magazine base 18, groove portions 18b are formed integrally or individually at corresponding positions of the respective guide bars 37, and the guide bar 37 does not contact between the groove portions 18b and the respective guide bars 37. Therefore, the pusher 3 as a whole has a plate-like shape similar to that of the connecting nail, and further has a plurality of recesses 33a. For this reason, in the present invention, the pusher 3 is manufactured by forming a recess 33a by pressing a steel plate having a thickness of 0.6 mm.

  As shown in FIGS. 2 to 6, the magazine cover 21 can accommodate a plurality of (six in this embodiment) guide bars 37 on the inner side facing the magazine base 18. Each guide bar 37 has an elongated plate-like shape as in the prior art, and extends in the longitudinal direction of the nail feed of the magazine cover 21 so that it can approach or move away from the opposing magazine base 18. The magazine cover 21 is slidably held so as to be movable in the nail feed direction of the magazine cover 21 and can protrude from the front surface 21c of the magazine cover 21 toward the nose 5 side. ing.

  The space for accommodating the connecting nail formed by the magazine base 18 and the magazine cover 21 has a width that can accommodate the longest nail connecting nail used by the nail driver 1, and the guide bar 37 and the groove 18b in the width direction thereof. Are provided at positions where the head surface 22a of other short connecting nails (the figure can accommodate six types of connecting nails) is pressed. On the opposite side of each guide bar 37 in the magazine cover 21 from the surface of the magazine base 18, leaf springs 39 are arranged at two locations on the front and rear sides of each guide bar 37 so as to be urged toward the magazine base 18. 39, the guide bar 37 prevents and guides the upward movement of the coupling nail head accommodated on the magazine base 18, and further serves to push the side surface of the nail shaft portion toward the base surface 18a. . Further, holding portions 41 and 42 shown in FIG. 6 are formed at both ends of the housing groove 38 so that the guide bars 37 are not detached from the magazine cover 21, and the holding portions 37 c that engage with the holding portions 41 and 42 are formed. , 37d are formed at corresponding positions on the guide bar 37.

  As shown in FIGS. 6 and 7, when the magazine cover 21 is open, each guide bar 37 is slidably accommodated in the nail feed direction, and each guide bar 37 is located behind the guide bar 37. The spring 26 is urged by the provided spring 26 to move toward the tip portion 43 side, and the tip portion 43 side and the abutting surface 37a are configured to protrude from the front surface 21c of the magazine cover 21 toward the nose 5 side. Yes.

  As shown in FIGS. 8 and 9, each holding portion 41 of the accommodation groove 38 on the front surface 21 c side of the magazine cover 21 has an engaging portion 21 a having a fixed flat portion smoothly connected from the tapered surface 21 b. When each guide bar 37 protrudes forward, the convex portion 37b of the guide bar 37 moves while contacting the tapered surface 21b of the magazine cover 21 and is simultaneously retracted toward the magazine cover 21, and finally the convex portion. 37b rides on the engaging portion 21a and stops. In the present embodiment, the taper surface 21b is provided on the magazine cover 21, but the guide bar 37 may protrude smoothly by providing the guide bar 37 with a taper surface. Thus, the magazine cover 21 is configured to be slidable in a state in which the distal end portion 43 of each guide bar 37 maintains a certain gap with respect to the base surface 18 a of the magazine base 18.

Next, a case where the magazine cover 21 is slid and closed on the magazine base 18 from the retracted state to the closing position will be described with reference to FIGS. As shown in FIGS. 9 and 11, the distal end portion 43 of each guide bar 37 slides with a certain clearance between the base surface 18 a of the magazine base 18, and the dimensions thereof are the base surface 18 a of the magazine base 18. To a height D overcoming the diameter d of the rear nail shaft portion of the connecting nail. Therefore, when the magazine cover 21 moves to the closed position, the tip 43 of the guide bar 37 moves forward with a gap D between the magazine base 18 and the magazine base 18 even with a small number of short connecting nails. It is possible to get over the nail shaft portion of the connecting nail.
Next, as shown in FIGS. 6 and 8, when the magazine cover 21 is completely closed, the contact surface 37 a of the guide bar 37 first strikes the contact surface 5 a of the nose 5, and the magazine cover 21 is brought into contact with the magazine cover 21. Simultaneously with retreating, the convex portion 37 b of the guide bar 37 is disengaged from the engaging portion 21 a of the magazine cover 21. At this time, the back surface of the guide bar 37 is urged by the leaf spring 39 and protrudes again toward the magazine base 18 to be in the state shown in FIGS.

  Each guide bar 37 has a front end portion 43 extending toward the nose 5 side protruding from the front surface 21c of the magazine cover 21 toward the nose 5 side in a state where the front surface 21c of the magazine cover 21 is in contact with the abutting surface 5a of the nose 5 and closed. The length of the nail following the top nail and the entire nail head or nail shaft portion behind the nail is long enough to enter the insertion port 5b into the driving passage 14 formed in the nose 5, When the magazine cover 21 is in the closed position, it extends to the position of the nail head of the nail next to the top nail, the details of which are shown in FIG.

Next, referring to FIG. 1 to FIG. 11, the connecting base 22 is loaded into the magazine base 18 by using the connecting base 22 having other length (35 mm in this example) shorter than the longest usable base. After that, the operation of accommodating and holding the connecting nail 22 in the magazine unit 2 by sliding the magazine cover 21 forward will be described.
First, as shown in FIG. 1, the lock claw 29 of the magazine cover 21 is released, and the magazine cover 21 is slid to the right side of FIG. 1 to open the connecting nail receiving space of the magazine base 18.
At this time, each guide bar 37 slides rearward in the nail feed direction, the front end side of the magazine cover 21 protrudes, and the convex portion 37b of the guide bar 37 moves while contacting the tapered surface 21b of the magazine cover 21 and is engaged at the same time. It rides on and engages with the portion 21a and is retracted to the magazine cover 21 side, and the distal end portion 43 of each guide bar 37 is open with a certain gap D with respect to the base surface 18a of the magazine base 18. .

  Next, the elongated connecting nail 22 is loaded so that the tip of the nail foot enters the back of the guide groove 25 of the magazine base 18. In this state, when the magazine cover 21 is slid to the nose 5 side, that is, forward, the pusher 33 comes into contact with the rear end of the connecting nail 22 and presses the connecting nail 22 toward the nose 5. Move to. When the leading nail of the connecting nail 22 enters the driving passage 14 of the nose 5, the movement of the connecting nail 22 stops, but since the magazine cover 21 continues to slide, the pusher 33 is contracted by the contraction of the pusher spring 34. Staying there while energizing the rear end of the 22nd. At the same time, as shown in FIG. 11, the front end portion 43 of the guide bar 37 faces the shaft portion of the rear nail of the connecting nail 22, but as described above, when the magazine cover 21 is open, the guide bar 37 The front end portion 43 of the magazine base 18 floats from the base surface 18a of the magazine base 18 with a gap D, and the guide bar 37 can easily overcome the diameter d of the nail shaft portion even in the case of a connecting nail having a small number and a short connecting length. You can go forward.

  Next, when the magazine cover 21 is completely closed, the contact surface 37a at the tip of the guide bar 37 comes into contact with the abutting portion 5a of the nose 5 and retreats relative to the guide bar 37, and at the same time, the convex portion 37b becomes the magazine cover. 21 is disengaged by moving from the engaging portion 21a, and further, the back surface of the guide bar 37 is urged by the leaf spring 39 and protrudes toward the base surface 18a side of the magazine base 18. As described above, since the guide bar 37 keeps a gap from the base surface 18a until immediately before the magazine cover 21 is completely closed, even if the connection nail has a small number of connections and a very short connection length, the tip of the guide bar 37 The portion 43 is not caught on the nail shaft at the rear end of the connecting nail.

  As described above, when the magazine cover 21 is completely slid to the closed position, the nail shaft side surface of the connecting nail 22 is pushed to the base surface 18a side by each guide bar 37, and the head surface 22a of the connecting nail 22 is further moved. Is prevented from moving upward by the guide bar 37 that is not in contact with the nail shaft, and is reliably loaded into the magazine base 18 in a guided state. This state is shown in FIG. In the case of the longest nail, the head surface 23a is guided in contact with the inner wall of the upper edge of the magazine cover 21 (see FIG. 1).

  Next, as shown in FIGS. 8 and 10, each guide bar 37 has a protruding distal end portion 43 received in the insertion port 5 b on the nose 5 side, and the distal end portion 43 is an edge of the magazine cover 21. It extends further in the longitudinal direction, and can hold the nail next to the connecting leading nail and the nail head or nail shaft portion behind the nail. Further, the distal end portion 43 of the guide bar 37 not in contact with the nail shaft portion enters the insertion port 5b into the driving passage 14 formed in the nose 5 along the base surface 18a of the magazine base 18, It extends to the position of the nail head of the nail next to the top nail, and is maintained in a posture that securely holds the head of the second nail in the position next to the top nail and the entire nail head behind it. In addition, the second nail in the next position is struck by the driver at the same time as the top nail and is blocked in the driving path.

The partially broken front view which shows one Embodiment of the nailing machine provided with the magazine unit of this invention which accommodated the longest nail which can be used. The partially broken expanded side view which shows this invention magazine unit which accommodated the other short nail. BB sectional drawing of FIG. The side view which looked at the magazine cover of FIG. 2 from the front side. The partially broken side view which looked at the magazine unit of FIG. 2 from the back side. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. Sectional drawing which shows the state which opened the magazine cover of FIG. The elements on larger scale of the circle C of FIG. The elements on larger scale of the circle D of FIG. Sectional drawing which shows the state which loaded the connecting nail of FIG. 8 in the magazine base, slid the magazine cover, and finished storing the connecting nail. Sectional drawing which shows the state in the middle of loading the connection nail of FIG. 9 in a magazine base, and sliding a magazine cover and accommodating a connection nail. In the conventional magazine unit, an enlarged cross-sectional view showing a state in which a connecting nail is loaded on a magazine base and a magazine cover is slid to receive the connecting nail. In the conventional magazine unit, an enlarged cross-sectional view showing a state in the middle of loading the connecting nail by loading the connecting nail into the magazine base and sliding the magazine cover.

Explanation of symbols

1: nailing machine, 2: magazine unit, 5: nose, 5a: abutting surface, 5b: insertion port, 13: driver, 14: driving path, 18: magazine base, 18a: base surface, 18b: groove, 18c : Opening part, 21: Magazine cover, 21a: Engagement part, 21b: Tapered surface, 21c: Front surface, 22: Other short-length connecting nail, 22a: Head surface, 23: Longest-use nail connection Nail, 23a: head surface, 24: nail foot guide groove, 25, 27: guide groove, 33: pusher, 33a: recess, 34: pusher spring, 35: pusher guide groove, 37: guide bar, 37a: contact Surface, 37b: convex part, 37c, 37d, 41, 42: holding part, 38: receiving groove, 39: leaf spring, 43: tip part, 55: pusher guide, 56: pusher piece

Claims (4)

A cylinder disposed in the housing, a piston capable of sliding up and down in the cylinder,
A driver connected to the piston for striking a nail in a nose driving passage;
A nailing machine comprising a magazine unit for receiving a connecting nail and sending a leading nail of the connecting nail to the driving passage in the nose;
The magazine unit includes a magazine base connected to the nose;
A space for accommodating the connecting nail is formed between the magazine base and the magazine base is slidably mounted in the longitudinal direction between the closed position for accommodating and holding the connecting nail and the open position where the connecting nail can be loaded. Magazine cover,
A guide bar that is housed in the magazine cover, is movably held in the direction of the nail feed of the magazine cover, and is held so as to be able to approach and separate from the magazine base;
A taper surface is provided on at least one of the nose side portion of the guide bar and the magazine cover that contacts the guide bar, and the guide bar is moved to the tapered surface when the magazine cover is moved from the open position to the closed position. By sliding along
When the magazine cover is in the open position, the guide bar is held at a position separated from the magazine base,
A nailing machine configured to move the guide bar to a position close to the magazine base when the magazine cover is in the closed position. 2. The magazine cover according to claim 1, wherein the magazine cover is provided with a holding portion that engages with a contact portion of the guide bar, and when the magazine cover is opened to the open position, a tip end portion of the guide bar projects to the nose side. In addition, the wide portion of the contact portion of the guide bar contacts the engaging portion of the magazine cover, and the front end side of the guide bar is retracted to a position away from the base surface of the magazine base. Nailing machine to do. 3. The guide bar according to claim 2, wherein when the magazine cover moves to the closed position, the tip end portion of the guide bar abuts against the magazine cover abutment surface of the nose and moves relatively backward. A nailing machine characterized in that a narrow portion abuts against an engaging portion of the magazine cover, and the guide bar is moved to a position close to the magazine base. A magazine base connected to the nose so that a plurality of nails are formed so as to accommodate the connecting nails connected in a plate shape, and the leading nails of the connecting nails are sent to the nose driving passage;
A space capable of accommodating a connecting nail is formed between the magazine base, and is slidably attached to the magazine base between a closed position where the connecting nail is accommodated and an open position where the connecting nail can be loaded. Magazine cover,
A guide bar provided on the inner side of the magazine cover and arranged to press a nail head or a nail shaft portion of the connecting nail;
A nailing machine having a magazine unit including an urging means for urging the guide bar toward the magazine base;
By providing a contact portion that engages with a holding portion provided in the magazine cover on the nose side portion of the guide bar,
When the magazine cover is in the open position, the guide bar is held at a position away from the magazine base,
When the magazine cover moves to the closed position, the tip of the guide bar moves forward with a predetermined distance from the base surface of the magazine base,
A nailing machine characterized in that when the magazine cover is completely closed, the front end protrudes to the nose side from the front surface of the magazine cover and presses the nail next to the leading nail and the nail behind the leading nail. .

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