JPS625889Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is capable of pulling up a driving driver against the elastic tension of a spring by pushing down a driver operating handle that is rotatably supported on the tool body. In the nail driving tool, the nail is driven into the material to be driven by lowering the pulled-up driver by the elastic tension of the spring, and the nail driving tool is configured to drive a nail into the material to be driven by lowering the driver which has been pulled up by the elastic tension of the spring. This invention relates to a drive mechanism for lifting and lowering a driver.

Conventionally, this type of nail driving tool has been provided with a drive mechanism that converts the depressing action of the driver operating handle into the lifting and lowering actions of the driving driver.

This drive mechanism consists of a driver operating handle rotatably supported on the tool body, a driver driving lever that pulls up the driving driver and compresses the driver driving spring, and a portion around the lever. The starting lever has one end that engages with a locking portion provided on the handle, and the other end that engages with the handle via a resilient member.
When the driving lever is rotated by pressing down the handle and rotating the driving lever against the elastic tension force of the spring through the elastic member and the starting lever, the driving lever is rotated. Gradually pull up the driver. When the push-down operation of the handle reaches the end of the operation, the engagement between one end of the starting lever and the locking step is automatically released, and the driving lever is moved by the elastic tension force of the spring. It is rotated in the opposite direction. Then, the driver is suddenly lowered, and the driver drives the nail into the material to be driven. After driving the nail, when the depressed state of the handle is released, the handle elastically biases the starting lever so that one end of the starting lever always protrudes toward the periphery of the driving lever. The structure is such that the elastic member returns to its original position before operation by the elastic force of the elastic member.

By the way, when the above-mentioned conventional starting lever is returned to its original position, the above-mentioned starting lever may be moved further than its original position before operation due to the elastic force of the above-mentioned elastic member. In this manner, when the starting lever moves, one end of the lever does not engage with the locking step of the driving lever, but is set in a state where it is bitten around the periphery of the driving lever. Therefore, in the next nail driving operation,
It becomes difficult to push down the handle.

Therefore, the present invention was proposed to solve the above-mentioned conventional drawbacks, and when the driver operation handle is returned from the depressed operation state to the original position before operation, one end of the starting lever is activated. The object of the present invention is to enable smooth depressing of the handle at all times by controlling the lever so that the peripheral part of the handle does not get caught.

The gist of the present invention is that it includes a driver operating handle rotatably supported on the tool body, and a driver driving lever that pulls up the driving driver and compresses the driver driving spring. and a starting lever, one end of which engages with a locking step provided around the lever, and the other end of which engages with the handle via a resilient member, and when the handle is pressed down, Then, by rotating the driving lever through the elastic member and the starting lever against the spring tension of the spring, the driver is pulled up, and one end of the starting lever and the starting lever are pulled up. The engagement state with the locking stepped portion is released with the driver pulled up, and the driver is lowered by rotating the driving lever in the opposite direction by the elastic tension force of the spring. In the nail driving tool, the driver and the spring are arranged so as to move in opposite directions relative to the driving machine, and the ceramic tube and the spring are moved by the driving lever by operating the handle. and the starting lever is arranged to be operated in the opposite direction via the starting lever, and one end of the starting lever and the locking step are formed so as to be disengaged when the starting lever rotates a predetermined amount. The drive mechanism for the nail driving tool is further characterized in that a stopper is provided at the other end of the starting lever to abut against the handle and stop the rotation of the starting lever at a predetermined position. It is something.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

As shown in FIG. 1, a main casing 2 serving as a main body of the nailing machine is disposed vertically on the front side of a nailing machine 1, which is an example of a nailing tool. and,
A driver driving lever 4 constituting a driving mechanism 40 for reciprocating the plate-shaped driving driver 3 along the front inner wall 2A of the casing 2 is disposed within the main casing 2. This lever 4 is rotatable about a pivot 5 provided in the casing 2 as a fulcrum. In other words, the lever 4
The tip 4a of the lever 4 is engaged with a hole 7 of a driver operation block 6 integrally connected to the upper end 3a of the driver 3, and the lever 4 rotates clockwise in FIG. 1 about a pivot 5. Then, the driver 3 is pulled up along the inner wall 2A of the main casing, and when the lever 4 is rotated counterclockwise in FIG. 1, the driver 3 is lowered along the inner wall 2A of the main casing. It's summery. Inside the main casing 2, when the lever 4 is rotated counterclockwise in FIG.
A bumper member 8 is provided to receive the lever 4 at the bottom dead center position. This bumper member 8 is made of a rubber material so as to be able to absorb the impact force when the lever 4 hits it.

The driver operating handle 9 for pulling up the driver 3 via the driver driving lever 4 has its base end 9b attached to the support shaft 10 so that its tip 9a protrudes diagonally upward to the right in FIG. It is pivotally supported by the main casing 2.

A starting lever 11 is interposed between the operating handle 9 and the driver driving lever 4. The starting lever 11 rotates the lever 4 clockwise in FIG. 1 by pushing down the handle 9. .
One end 11a side of this starting lever 11 has a center portion 13c disposed on the movable shaft 12 of the lever 11, and both ends 13a, 13b are torsionally engaged with the upper wall 9A in the operating handle 9. The V-shaped notch groove 14 formed at one end 11a of the starting lever 11 is always biased in the direction of arrow A in FIG. 1 by the elastic force of the coil spring 13. It engages with a locking step 15 formed on the peripheral portion 4A of the base end 4b side.

That is, since the starting lever 11 is always elastically biased in the direction of arrow A in FIG. The engaged state is maintained until the operating handle 9 is pushed down and the one end 11a of the starting lever 11 passes over the locking step 15 of the driver driving lever 4.

The other end 11b side of the starting lever 11 is pushed in the direction of arrow A' in FIG. 1 as the one end 11a side is biased in the direction of arrow A in FIG. It is located directly below. The other end 11b of this starting lever 11 is connected to one end 11b when the handle 9 is released, that is, before starting.
1a side notch groove part 14 and the above-mentioned driving lever 11
It has rising portions 70, 70 that serve as stopper portions to prevent the locking member from separating from the locking step portion 15.
That is, even if the one end 11a of the starting lever 11 attempts to move toward the tip 4a of the driving lever 4 due to the elastic force of the coil spring 13, the rising portions 70, 70 will not move against the inner wall 9A of the handle 9.
This is prevented by contacting the

On the other hand, large-diameter and small-diameter compression coil springs 16 and 17 that apply a downward force to the driver 3 by rotating the driver driving lever 4 in the counterclockwise direction in FIG. It is arranged in a cylindrical storage chamber 20 configured by forming bulges with semicircular cross sections facing each other on the surfaces 18 and 19. One end 16a, 17a of each of the springs 16, 17 is connected to one end side of the storage chamber 20, that is, one notch edge 2.
The other ends 16b and 17b are received by the fixing block 22 placed on the housing chamber 20, that is, the other notch edge 2.
It is received by a movable block 24 that abuts on 3. That is, when the driver driving lever 4 rotates clockwise in FIG.
The spring operating protrusion 25 protruding from the movable block 24 is compressed by pressing the cylindrical part 26 protruding from the upper surface of the movable block 24 in the direction of arrow B in FIG. The fixing block 22 has an inner circumference 1 of the small diameter compression coil spring 17.
A cylindrical body 27 is implanted to guide 7A.
The diameter of the tip 27a of the cylindrical body 27 is reduced, and the tip 27a fits into a concave portion 28 with a circular cross section formed in the movable block 24 so as to be able to protrude and enter. Further, the other end 17b of the small diameter compression coil spring 17 is engaged with an annular groove 29 carved in the bottom surface 24A of the movable block 24, and is positioned.

Further, the lower end side of the main casing 2 is provided with a driven material 1, which will be described later, by the reciprocating movement of the driver 3.
A magazine device 30 is provided for loading nails 101, 101, . . . to be driven into the nails 00. Note that the adjacent portions of the nails 101, 101, . . . are connected to form a connecting nail 110.

This magazine device 30 is fixed to the main casing 2 and the rear end 5 of the grip portion 50.
A long magazine body 31 extending to the 0b side
, a contact base 32 that is slidable along the lower edge 31A of the magazine body 31, and nails 101 and 10 loaded in the magazine body 31.
1... and a pusher 33 that presses the nail driving portion 60 formed at the front end inside the main casing 2. Pushsha 33 above
By sliding the contact base 32 toward the rear end 31b of the magazine body 31, the protrusions 34, 34 protruding from the inner wall on the tip 32a side of the contact base 32 engage with the lower edge 33A of the pusher 33. The magazine body 31 is then moved within the magazine body 31 against the elastic force of the compression coil spring 35. In this way, the contact base 32 is connected to the rear end 31 of the magazine body 31.
When the magazine body 31 is slid in the b direction, the lower end of the magazine body 31 is opened, and the nails 101, 101, . . . can be loaded into the magazine body 31 from the heads 102, 102, . That is, the nail 101,
101... can be loaded from below the magazine body 31. Therefore, nails 101,10
1... into the magazine body 31 is easy, and the loading time of the nails 101, 101... can be shortened.

Next, referring to FIGS. 2 to 4, the operations of the starting lever 11 and the driver driving lever 4 when the driver operating handle 9 is pressed down will be described.

As shown in FIG. 2, when the operating handle 9 is rotated clockwise in FIG. 2 with the support shaft 10 as a fulcrum, the coil spring 13
and the starting lever 11. The elastic force of the coil spring 13 due to this compression is applied to the tip 11 of the starting lever 11.
a, the starting lever 11 rotates the driving lever 4 clockwise in FIG. 2.
Then, by rotating the drive lever 4, the driver 3 is gradually pulled up. At this time, the base end 4 of the driver driving lever 4
Spring operating protrusion 25 protruding from side b
is the other end 16 of each compression coil spring 16, 17
Movable block 24 that receives b, 17b
is pressed in the direction of arrow B in FIG. 2 to compress each of the coil springs 16 and 17.

Then, as the push-down operation of the operating handle 9 progresses and the driver 3 reaches the end of its forward movement as shown in FIG. 15, the engagement between the notch groove 14 of the starting lever 11 and the locking step 15 is automatically released. Then, as shown in FIG. 3, the compressed state of each of the coil springs 16 and 17 is released by the rotation of the driver driving lever 4, and each of the coil springs 1
6 and 17 suddenly expand in the direction of arrow C in FIG. Then, until now the movable block 24
The spring operating protrusion 26 of the driver drive lever 4 that was pressing the coil spring 1
6 and 17, the driver driving lever 4 is suddenly reversed counterclockwise in FIG. 3. Then, the driver 3 maintains the engaged state between the driver operating block 6 and the tip 4a of the driver driving lever 4,
The nail 101 located at the nail driving part 60 is driven into the material 100 by rapidly descending.

After driving the nail, as shown in Fig. 4,
When the push-down state of the handle 9 is released, the handle 9 rotates counterclockwise in FIG. Returns to the original position before the lowering operation.

At this time, the one end 11a of the starting lever 11 moves toward the tip 4a of the driving lever 4 while following the peripheral portion 4A on the base end 4b side of the driving lever 4, and the rising portion 70 on the other end 11b side, At the same time that 70 comes into contact with the inner wall 9A of the handle 9, the notch groove 14 engages with the locking step 15. Therefore, the one end 11a of the starting lever 11 is further extended from the position of the locking step 15 of the driving lever 4 to the tip 4a.
There is no movement toward the side circumferential portion 4B, and it is possible to prevent the one end 11a of the starting lever 11 and the tip 4a side circumferential portion 4B of the drive lever 4 from galling.

Therefore, the depression operation of the handle 9 during the next nail driving operation is as smooth as the operation during the previous nail driving operation, and it is possible to always obtain a smooth depression operation of the handle 9. Furthermore, if the bumper member 8 is damaged due to long-term nail driving operation, the drive lever 4 may rotate further counterclockwise in FIG. 4 than its normal position before the nail driving operation. However, this rotation can be prevented by the engagement between the rising portions 70, 70 of the starting lever 11 and the inner wall 9A of the handle 9.

As described above, according to the present invention, when the driver operation handle is returned from the depressed operation state to the original position before operation, one end of the starting lever does not get stuck around the drive lever. Therefore, the handle can always be pressed down smoothly.

[Brief explanation of the drawing]

Fig. 1 is a schematic side sectional view of a nailing machine showing an embodiment of the present invention, Fig. 2 is a side sectional view of the main part showing the state in which the driver is pulled up, and Fig. 3 shows the nail driving completed state. FIG. 4 is a side sectional view of the main part showing a state in which the driver operation handle is returned to its original position before the push-down operation. 1... Nailer, 2... Main casing, 3...
...driver for driving, 4 ... lever for driving driver, 9 ... handle for driver operation, 10 ... spindle, 11 ... lever for starting, 11a ... one end, 1
1b...Other end, 13...Torsion coil spring, 14...
...Notch groove, 15...Locking step, 16, 17...
...Compression coil spring, 70,70...Rising part.

Claims (1)

[Scope of utility model registration request] A driver operating handle rotatably supported on the tool body, a driver driving lever that pulls up the driving driver and compresses the driver driving spring, and a locking stage provided around the lever. a starting lever, one end of which engages with the spring member and the other end of which engages with the handle via a resilient member; when the handle is pressed down, the driving lever is engaged with the resilient member and the starter lever; The driver is pulled up by rotating the starting lever against the elastic tension of the spring, and the engaging state between one end of the starting lever and the locking step is adjusted. In the nail driving tool, the driver is lowered by releasing the tube in a pulled-up state and rotating the same lever in the opposite direction by the elastic tension force of the spring, wherein the driver is lowered. The above-mentioned spring is arranged so as to move in opposite directions relative to the driving machine, and the above-mentioned ceramic tube and spring are operated in opposite directions by the operation of the above-mentioned handle via the above-mentioned driving lever and the above-mentioned starting lever. The one end of the starting lever and the locking step are formed so as to be disengaged when the starting lever rotates a predetermined amount, and the other end of the starting lever A drive mechanism for a nail driving tool, comprising a stopper that comes into contact with a handle and stops the rotation of the starting lever at a predetermined position.