TWI508827B - Into the tool - Google Patents

Description

Driving tool

The present invention relates to a driving tool mainly for a hand-held nailing machine or the like.

For example, in the case of a compressed air driven nailing machine, the main body of the piston that reciprocates by the compressed air is provided; the front end of the main body is provided at the front end of the main body, and the driving portion of the striking striker attached to the piston is guided; a handle portion extending laterally of the portion; and a plurality of staples supplied to the driving portion. The magazine is loaded with a plurality of fasteners that are joined by a joint member in parallel. The coupling ejector that is loaded in the magazine is pressed in the supply direction (on the side of the passage) by the spring force of the spring. By the spring-pushing thrust, the driving is carried out in the driving passage which becomes empty after the driving is completed, and is supplied one by one.

The driving portion is configured such that a striker reciprocates between the passage forming member and the ejector feed port of the magazine, and a driving passage that can accommodate a space of one ejector is formed.

In general, for example, as described in the following patent documents, the cross-sectional shape is complicated in order to ensure the strength (mainly bending strength) when hitting a striker with a strike. As a result, since the insertion path of the insertion pin has a complicated cross-sectional shape, the path forming member or the like constituting the driving path is formed by forging or cutting a material. Complex bumps.

In recent years, in order to reduce the cost of the entry unit, a technique for using a low-cost member (so-called sheet metal part or sheet metal) produced by press working or punching of a steel sheet as a passage forming member has been provided. .

[Patent Document 1] Japanese Patent Laid-Open No. Hei 7-246575

However, in the case where the passage forming member constituting the driving path is formed of a so-called sheet metal part, it is difficult to maintain a complicated cross-sectional shape in the processing form, and thus the driving path is a simple rectangular cross-sectional shape. As a result, in the long type of striker, in order to secure the strength, it is necessary to set the cross-sectional shape in a wide range, and it is also necessary to set the opening passage for the insertion.

In this way, in the case where the passage forming member constituting the driving portion is formed of a so-called sheet metal part, the width dimension of the driving path must be set to be larger than the required width dimension for inserting only one punching member. The larger the width, the problem is that the position of the feed in the direction of the width of the passage is unstable. If the position in the width direction of the punching hole in the drive path is unstable, the following trouble may occur. When the punching member is connected to the middle of the punching position, the connecting member (wire or sheet) is held by the punching device on the rear side (the rear side of the feeding direction), so that a large amount is not generated in the driving path. Positional deviation.

On the other hand, in the case of the last punching device (the last nail) that connects the punching device, the other connecting punching device is additionally loaded on the rear side in the feeding direction, and the joining of the additional loading device is performed. Since the initial punching members are not connected to each other by the connecting members such as the wires, the final punching device cannot be attached to the initial hitting member holding position by the additional loading. Therefore, the last hitter of the hitter is in the drive path, and there is a large positional deviation in the width direction. If the feed punch has a positional deviation in the width direction in the drive path, the kicker on the rear side is pressed in the feed direction by the spring-loaded thrust, and a part of the head enters the drive path. As a result, two hits were rarely hit at the same time. If the two hitters are hit once, the hits will be blocked in the drive path, which is the cause of the so-called problem.

This problem is particularly close to the fact that the nail shafts (the shaft portions of the punching members) are substantially free of each other with the purpose of increasing the number of joints per unit length of the joint driving members, and most of the rods have a high density. It is easy to occur in the case of a link into a hit (high-density link punch).

The present invention has been made in view of the above problems, and an object thereof is to make a member constituting the driving portion a so-called sheet metal part for the purpose of cost reduction, and as a result, even in a case where the driving path is widely set, By stabilizing the position of the punching device in the width direction of the driving path, and finally connecting the last punching device of the punching device, the bumps are surely struck one by one, so that the previous two punching tools are once The situation of the blow will not happen.

Accordingly, the present invention is a constructional entry tool as recited in the claims of the patent claims.

According to the driving tool of the first aspect, the position of the head of the driver to be supplied into the driving path in the width direction of the path is restricted by the regulating portion to be smaller than the width of the striker. Therefore, the driving direction is maintained at a substantially central position in the width direction of the driving path, and the lowering of the driving device into the driving path is restricted. As a result, only one impact is actually struck by the striker. Hit the inset so that there is no problem with the previous hit of 2 hits.

According to the driving tool of the second aspect of the invention, the positional deviation of the head of the one of the driving members that is supplied to the driving path in the direction of the width of the path is restricted, so that the next one can be more reliably prevented. The inlet enters the supply port side.

According to the driving tool according to the third aspect of the invention, the high-density connecting ejector is provided in which the head portion is overlapped and the shaft portion is brought into close contact with each other without gaps, so that high-efficiency driving can be performed even if it is high. In the case of density hitting, there will be no problem with the previous hit of 2 hits, and one hit can be hit once.

According to the driving tool of the fourth aspect of the invention, it is possible to reduce the cost of the driving tool by using a low-cost sheet metal member for the passage forming member constituting the driving portion.

According to the driving tool of the fifth aspect, the above-described effects can be obtained for the so-called combustion type driving tool.

Next, an embodiment of the present invention will be described based on Figs. Fig. 1 shows the driving tool 1 of this embodiment. In the present embodiment, a gas burning type nailing machine that uses the thrust obtained by the combustion (combustion gas) of the combustible gas as the striking force is exemplified as the driving tool 1.

The driving tool 1 includes a main body portion 2 of a piston 10 that reciprocates by a thrust of a combustion gas, and a driving portion 20 that is provided in a state of extending downward from a lower portion of the main body portion 2; The handle portion 3 is provided in a state in which the side portion is extended to the side, and the magazine portion 4 is provided from the front end of the handle portion 3 to the driving portion 20 in an erected state.

The driving tool 1 of the present embodiment has the basic structure of the driving tool 20 including the main body 2, the handle portion 3, and the magazine 4, and the like. The schematic structure will be described.

The piston 10 is housed in a cylinder 12 housed in the same body portion 2. Mounted from the lower center of the piston 10 for striking the striker 11 having the n to extend downward. The lower side of the striker 11 enters the drive path 28 of the drive portion 20. Details of the entry unit 20 will be described later.

The upper chamber of the cylinder 12 above the main body portion 2 serves as the combustion chamber 12a. In the combustion chamber 12a, a stirring fan 13 for agitating the supplied combustible gas and air is disposed. The agitating fan 13 is rotated by the fan motor 14. The combustible gas is supplied quantitatively by the cartridge type gas cylinder 15. Further, a spark plug 16 is disposed in the combustion chamber 12a.

The contact rocker 21 is disposed in the driving portion 20. The contact rocker 21 is supported to be vertically displaceable along the driving portion 20. When the contact rocker 21 is moved to the lower end position, the lower end portion thereof is in a state of protruding only a certain size from the lower end of the driving portion 20. The upper portion of the contact rocker 21 is connected to the movable cylinder 6 housed in the main body portion 2 via the intermediate rocker 17 in a movable manner.

Before the driving operation, if the lower end portion of the contact rocker 21 is pressed against the driving object W to be relatively moved upward, the movable cylinder 6 is integrally moved upward, and the combustion chamber 12a is hermetically closed. At the same time, a certain amount of flammable gas is injected from the gas cylinder 15 into the combustion chamber 12a, and the fan switch 18 is opened, and the fan motor 14 is started, whereby the stirring fan 13 rotates to agitate the supplied flammable gas. With the air.

Thereafter, the switch rocker 5 in the form of a trigger disposed at the base of the handle portion 3 is pulled by the fingertip, and the ignition switch 19 is opened to generate a spark in the combustion chamber 12a, whereby the combustible gas is instantaneously burned. The piston 10 is moved downward by its thrust. When the piston 10 is moved downward, the striker 11 is integrated into the driving passage 28 to move downward, and the lower end of the driving direction is struck to hit the head with the n, and the driving member of the one is driven into the n. The lower end of the portion 20 (the ejection opening 23a) is struck and is driven into the object W to be driven.

The nail magazine 4 is loaded with a plurality of punches n~n. The plurality of punching members n to n are loaded by a joint member (not shown) such as a belt-shaped adhesive tape and joined together in a so-called joint punching device N. Figure 2 shows a hit with n. Each of the punches n uses a nail having a shaft portion na and a flange-shaped head portion nb. The rear side of the supply direction of the head nb has a notch (notch nc) as indicated by a dotted line at 2 o'clock. As shown in the figure, each of the punching members n is such that the notch nc of the head portion nb is placed on the rear side in the supply direction and is coupled to each other.

In addition, as shown in FIG. 1, the adjacent driving members n and n are such that the heads nb and nb are not interfered with each other, and the driving member n on the rear side in the feeding direction is shifted in the upper side in the axial direction so that the head portion nb It protrudes above the head nb of the punching tool n on the front side in the feeding direction, and is joined in this overlapping state. Therefore, in a state of being loaded in the magazine 4, a stepped state in which n to n is shifted toward the rear side in the supply direction and the thickness of only the head portion nb is shifted to the upper side is engaged, thereby making the adjacent punching device n n is combined in a state in which the shaft portions na and na are close to each other without gaps. In the present specification, such a plurality of links are driven into a N-n connection with a high density in parallel, and a high-density connection is driven into the N.

Next, the details of the entry unit 20 are shown in FIG. The driving portion 20 is provided at a lower portion of the cylinder 12.

At the lower portion of the cylinder 12, an annular damper 27 is provided for restricting the position of the lower end of the piston 10 and mitigating the impact at the position of the lower end. A substantially circular insertion opening 12b for mainly inserting the striker 11 is provided in the center of the lower surface of the cylinder 12 which is aligned with the inner peripheral hole of the damper 27. Below the cylinder 12, a substantially annular front plate 25 is mounted. The front plate 25 is fixed to the lower surface of the cylinder 12 by means of three fixing screws 26 to 26. The striker 11 passes through the inner peripheral side of the front plate 25 and the insertion opening 12b of the cylinder 12, and protrudes into the driving passage 28 of the driving portion 20 below the striker.

The driving portion 20 has a structure in which the bottom plate 22 and the passage forming member 23 called the striker guide plate are placed in a state of being overlapped with the mounting base portion 4a of the magazine 4 or in a state in which they are placed against each other. The bottom plate 22 is integrally provided at a lower portion of the cylinder 12 of the body portion 2. The bottom plate 22 is provided in a state of protruding from the lower surface of the cylinder 12 to the lower side through the inner peripheral side of the front plate 25. The contact rocker 21 is disposed to be movable up and down along the outer side surface (the left side surface in FIG. 3) of the bottom plate 22.

A passage forming member 23 is attached to the inner surface side (the right side surface in Fig. 3) of the bottom plate 22. The passage forming member 23 is a so-called sheet metal part produced by press working or punching a material such as a steel plate, and has a length from the insertion port 12b of the cylinder 12 to the lower end portion of the bottom plate 22, and a width substantially the same as that of the bottom plate 22. .

As shown in FIG. 4, a driving path 28 is formed along the center in the width direction of the passage forming member 23 over the entire length direction thereof. The front end of the passageway 28, that is, the lower end of the passage forming member 23, corresponds to the ejection opening 23a of the driving member n.

The driving path 28 is formed into a relatively wide cross-sectional rectangle by the width dimension D and the depth dimension of the insertable striker 11. As described above, the passage forming member 23, that is, a so-called sheet metal member, which is formed as a relatively simple cross-sectional rectangle as shown in Figs. Further, the striker 11 having a relatively simple cross-sectional rectangle which is inserted into the passage 28 in correspondence with this has a cross-sectional rectangle having the same width mainly for ensuring the bending strength thereof.

The width dimension D of the driving path 28 as shown in FIG. 6 is set to be larger than the diameter nd (see FIG. 2) of the head nb of the supplied driver n, and the striker 11 is engaged therewith. Also set to a wide width to ensure its full flexural strength.

In the present specification, the width direction of the driving path 28 or the width direction of the striker 11 means that the driving direction of the driving tool n (the direction orthogonal to the paper surface in FIG. 6) is the left-right direction, that is, FIG. 4 and In the upper and lower directions in Fig. 6, the left and right directions in Fig. 5. In addition, the width direction of the access path 28 is also referred to as the path width direction.

In the range from the midway position of the driving path 28 to the ejection opening 23a, the top plate portion of the driving path 28 (the portion facing the punching supply port S) is provided with a semicircular head. The clearance recess 23b. As shown in FIGS. 3 and 6, when one of the driving members n is supplied into the driving path 28, the head portion nb of the driving member n abuts against the top plate portion of the driving path 28, and the other The front end side of the shaft portion na enters the head clearance recess portion 23b, and as a result, the shaft portion na is held in the driving passage 28 in a slightly inclined posture.

After the striker 11 hits the driver n and starts to move down, the head nb immediately enters the head clearance recess 23b, whereby the shaft portion na is corrected to be straight forward with respect to the driving direction. Further, the thrust of the striker 11 is in a state of acting on the center of the shaft portion na, and in this state, the driver n is driven out from the discharge port 23a. When supplied into the driving path 28 in this manner, by restricting the amount of entry into the driving path 28 into the head portion nb, the head nb of the next driving member n is entered into the driving path 28 together. As a result, it is not possible to simultaneously strike two indentations n and n by the striker 11 .

As shown in FIG. 4, the passage forming member 23 and the magazine 4 are coupled to each other by the fixing screws 30, 30 to the bottom plate 22. The two fixing screws 30, 30 are inserted into the inner peripheral side of the insertion sleeve 31 which is respectively attached to the bottom plate 22. The two insertion sleeves 31 and 31 penetrate the passage forming member 23 and protrude toward the rear side (the side of the magazine 4) in the supply direction of the driving member n. On the outer peripheral side of the protruding portion, a fixed collar 32 is attached. In a state of being sandwiched between the two insertion sleeves 31, 31 and the fixed collars 32, 32, the mounting base 4a of the magazine 4 is fixed by locking the nuts 33 to the fixing screws 30, 30, respectively. The bottom plate 22 is joined. Further, the passage forming member 23 is thereby fixed to the bottom plate 22 and the magazine 4.

The bottom plate 22 and the passage forming member 23 and the mounting base portion 4a are joined to each other in the mutually overlapping state or in the mutual matching state, and the nailing portion 4 is coupled to the driving portion 20 and along the path forming member 23 and the mounting base portion 4a. Forming a drive path 28. Each of the punches n that has been driven into the N is fed into the driving path 28 through the supply port S of the mounting base 4a. The rear side of the supply direction of the magazine 4 is coupled to the front end side of the handle portion 3.

The magazine 4 shown in Fig. 6 is provided with a guide member 4b that guides the connection of the head portion nb of each of the punchers n with the N. The guide member 4b has a c-shaped cross section, and is attached to the upper portion of the magazine in a state where the opening side thereof is downward. Each of the punches n is loaded into the magazine 4 with its head nb suspended from the guide member 4b, and is fed in the hanging direction (to the left in FIG. 6) in the suspended state. The front end of the guiding member 4b is directly in front of the driving path 28. However, as shown in Fig. 3, the total of the punches n and the rear side of the driving path 28 are about three of the driving members n to n, and the head portion nb is separated from the guiding member 4b. Therefore, it is necessary to define the position of the head width nb of the punching path 28 having the large width dimension D of the diameter nd of the head portion nb in the direction of the passage width. Therefore, in the present embodiment, the upper portion of the supply port S is provided with a restricting portion 40 for restricting the position in the width direction of the path of the head portion nb of the punching device n in the driving path 28.

In the case of this embodiment, the restriction portion 40 shown in FIG. 3 includes two restriction projections 41 and 41. The two restricting projections 41 and 41 are integrally provided on the front plate 25. The two restricting projections 41 and 41 project downward along the driving passage 28 (on the side of the ejection opening 23a). When one punch n is supplied to the drive path 28, the restricting projections 41, 41 become located on both sides of the head portion nb. The interval between the two restricting projections 41, 41 (restricted size 40a) is a necessary and sufficient size for smoothly passing the head nb of the driven member n to be substantially the same as the head guiding member 4b of the magazine 4 Size setting. By the restriction projections 41 and 41 which are located on the left and right of the head portion nb in the supply direction of n, the head portion nb of the indentation n is held at the center in the width direction of the drive path 28.

Here, as shown in FIG. 7, assuming that the restricting portion 40 (the restricting projections 41, 41) does not exist, the punching device n supplied to the driving path 28 is the last punching device for connecting the driving member N. In the case of the punching device on the rear side of the feeding direction (the initial punching device of the other connecting punching device that is additionally loaded), the connecting member is not connected to each other by a connecting member such as a wire, and thus the final punching device is not The position is maintained by the punch on the rear side. Therefore, the final punch n is easily displaced in the width direction (upper side or lower side in FIG. 7) in the drive path 28 which is formed wider than necessary (above). When the last punch n supplied to the driving path 28 is displaced in the direction of the width of the path, the other direction of the additional loading close to this is used to drive the feeding direction of the first punch n having the N. The spring-loaded thrust, the head nb pressed against the side of the drive path also becomes easy to enter the passage 28. If the heads nb and nb of the two injecting n and n are located in the driving path 28, there is a case where the striker 11 is hit once. If two punches n and n are hit once, this is equal to the blockage in the drive path 28, which is the cause of the so-called failure.

On the other hand, as described above, in the driving portion 20 of the present embodiment, the head portion nb of one of the driving holes 28 is supplied to the driving path 28, and the width of the driving path 28 is restricted by the projections 41 and 41. Keep the position in the center of the direction. Therefore, since the head nb of the next driving member n is not pushed out into the driving path 28, only one of the driving members 11 is struck by the striker 11. Since the two hits are prevented from being hit at the same time (two hits), there is no such trouble.

According to the driving portion 20 of the present embodiment described above, the passage forming member 23 constituting the driving passage 28 is set as a wide-width member for securing the main bending strength of the striker 11 thereon as a so-called sheet metal member. As a result, even if the driving path is formed in a wide range, the positional deviation in the direction of the width of the path of the head nb of the driving member n supplied into the driving path 28 is limited and maintained in the width direction of the path. Central. Therefore, since the head nb of the next driving member n is prevented from projecting into the driving path 28, the two driving members n and n are not simultaneously struck by the striker 11, thereby preventing the so-called malfunction. The nail is blocked.

As described above, according to the driving portion 20 of the present embodiment, even if the driving passage 28 is provided in a wide width and the strength of the striker 11 is secured, the driving member n is held at the width of the driving path by the regulating portion 40. In the center, it is possible to form a member for inserting the passage 28 such as the passage forming member 23 without causing a failure in which n and n are simultaneously hit, and it can be used as a so-called sheet metal part. The entry unit 20 even drives down the cost of the tool 1.

The embodiments described above can be modified in various ways. For example, as a member constituting the driving path 28, the passage forming member 23 constituting the top side thereof is a so-called sheet metal part, but the bottom side of the driving path 28 (the mounting base 4a of the magazine 4) is sheet metal. The same applies to the case of a part or the case where both parts are sheet metal parts.

Further, although the gas burning type as the driving tool 1 is exemplified, the present invention is not limited thereto, and the compressed air driving type driving tool can be similarly applied.

In addition, as the punching tool n, the nc portion of the head portion nb is exemplified, and the shaft portion na is coupled with the high-density coupling in the closed state, but has a round head with no notch. Incorporation, the connection of the links at a certain interval can also be applied.

1. . . Driving tool (gas burning nailing machine)

2. . . Body part

3. . . Handle

4. . . Nail

4a. . . Mounting base

4b. . . Head guide

5. . . Switch rocker

6. . . Movable cylinder

10. . . piston

11. . . firing pin

12. . . cylinder

12a. . . Combustion chamber

12b. . . Plug in

13. . . Stirring fan

14. . . Fan motor

15. . . Gas cylinder

16. . . Mars plug

17. . . Middle rocker

18. . . Fan switch

19. . . Ignition Switch

20. . . Driving department

twenty one. . . Contact rocker

twenty two. . . Bottom plate

twenty three. . . Path forming member

23a. . . Shot exit

23b. . . Clearance recess

25. . . Ger

26. . . Fixing screws

27. . . Damper

28. . . Drive into the path

30. . . Fixing screws

31. . . Plug-in bushing

32. . . Fixed collar

33. . . Nut

40. . . Restriction department

40a. . . Restricted size

41. . . Limiting protrusion

D. . . Width size

N. . . Link hitter (high-density link hitch)

n. . . Hit in

Na. . . Shaft

Nb. . . head

Nc. . . Rear (back gap)

Nd. . . Diameter of the head nb

S. . . Supply port

W. . . Into the object

Fig. 1 is a view showing a whole of a driving tool according to an embodiment of the present invention in a longitudinal section.

Figure 2 is a perspective view of the hitter.

Figure 3 is a longitudinal section of the driving tool.

Figure 4 is a cross-sectional view of the section (IV)-(IV) of Figure 3, which is a cross-sectional view of the driving portion and the nail.

Fig. 5 is a view of the driving portion as seen from the direction of the arrow (V) of Fig. 3.

Fig. 6 is a view showing a positional relationship with respect to the driver of the driving portion of the embodiment, and Fig. 6 is a cross-sectional view of the driving portion as viewed from the same direction as Fig. 4.

Fig. 7 is a view showing a positional relationship with respect to the punching device of the driving portion in the case where the restricting portion of the embodiment is omitted.

2. . . Body part

4a. . . Mounting base

11. . . firing pin

20. . . Driving department

twenty one. . . Contact rocker

twenty three. . . Path forming member

23a. . . Shot exit

23b. . . Clearance recess

25. . . Ger

26. . . Fixing screws

28. . . Drive into the path

30. . . Fixing screws

40a. . . Restricted size

41. . . Limiting protrusion

D. . . Width size

Na. . . Shaft

Nb. . . head

S. . . Supply port

Claims (6)

A driving tool includes: a main body portion having a reciprocating piston therein; and a driving portion protruding downward from a lower portion of the main body portion, and having a striker pin for being inserted into the piston a driving passage; and a nail that accommodates the punching device supplied to the driving passage; and a restricting portion that feeds the head of the driving device that is supplied to the driving passage in a width direction of the driving passage The displacement is limited to a width smaller than the width of the aforementioned striker. The driving tool of claim 1, wherein the driving path is formed between the passage forming member and the punch supply port of the nail, and the restricting portion is disposed at a position in a width direction of the driving passage. Drive into the supply port side. The driving tool of claim 1, wherein the nailing system is capable of feeding a connecting driver to the driving portion, the coupling driving device having a shaft portion and extending radially from an end portion of the shaft portion The plurality of punching members of the flange-shaped head portion are formed by being aligned in parallel in the axial direction of the shaft portion and in a state in which the head portions are overlapped. The driving tool of claim 2, wherein the nailing system is capable of feeding a connecting driver to the driving portion, the coupling driving device having a shaft portion and extending radially from an end portion of the shaft portion The plurality of punching members of the flange-shaped head portion are formed by being aligned in parallel in the axial direction of the shaft portion and in a state in which the head portions are overlapped. The driving tool of claim 2, wherein the passage forming member is a sheet metal part. A gas burning type driving tool, which is the driving tool according to any one of claims 1 to 5, and is provided with a body portion configured to move the piston in a striking direction by a thrust of a combustion gas.