JPS5821657Y2 - Shock absorption mechanism in hammer tatsuka - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hammer tacker that secures wire lath nets, chair covers, etc. to the material to be driven by hammering a magazine containing a stable onto the material to be driven. The present invention relates to a shock absorption mechanism in a hammer tacker.

Conventionally, as a shock absorbing mechanism for a hammer tacker, one in which one end of a link is attached to a rear end portion of a magazine and the other end of this link is attached to a handle unit is known.

However, this link system has the drawback that it requires a large number of parts, and also has the drawback that cracks are likely to occur in the links.

As another example, a hanger provided at the rear end of the magazine is provided with a longitudinally elongated hole to absorb shock during driving.

However, the impact that can be absorbed by this long vertical hole is only when the entire bottom of the magazine is hammered into the workpiece at a right angle, and when the workpiece is driven at an angle to the workpiece at an angle. It was not possible to absorb the impact when hitting the ball.

In addition, since the magazine cannot move horizontally (longitudinal direction), the magazine cannot follow the horizontal deflection of the idle driver during driving, and therefore the front end of the magazine and the driver cannot slide. This had the disadvantage of increased resistance.

The present invention was developed in view of the above-mentioned circumstances, and it absorbs the impact in any direction applied to the magazine, and also prevents the sliding movement between the magazine and the driver at the front end of the magazine. It is an object of the present invention to provide a shock absorbing mechanism that makes it possible to reduce resistance.

To achieve these objects, the present invention provides a magazine unit which is arranged parallel to a handle unit having a weight block and a driver at its front end, and drives out stables one by one from the stable punching hole at its front end using the driver. A tail hanger is integrally provided at the rear end portion, a substantially triangular shock absorption hole is bored in this tail hanger, and a pivot pin is loosely inserted into this shock absorption hole, and is fixedly attached to the above-mentioned handle unit. The magazine unit is elastically supported on the handle unit by elastic means.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIG.

FIG. 1 shows a longitudinal section of a hammer tacker equipped with the shock absorbing mechanism of the present invention.

The main parts of this hammer tacker 1 are a magazine unit 2,
It is composed of a handle unit 3 and a grip 4 connected to the handle unit 3.

The magazine unit 2 includes a magazine body 5 disposed parallel to the handle unit 3, a slider 6 for opening and closing the upper surface of the magazine body 5, and a staple guide 7 integrally built into the magazine body 5.
a magazine cover 8 mounted on the distal end of the magazine body 5 so as to be perpendicular to the magazine body 5;
Button 10 and handle unit 3 that move while being guided by long holes 9 provided along the longitudinal direction of slider 6
and a tail hanger 11 that supports the magazine body 5 so as to be able to pivot relative to each other.

This tail hanger 11 is integrated with the magazine body 5 and
It extends upward from this magazine body 5,
A shock absorption hole 1 is provided in the upper protrusion 11a of the tail hanger 11.
1b is perforated.

This shock absorption hole 11b is formed in a substantially triangular shape, and has a horizontal portion 11c that is long in the longitudinal direction of the magazine body 5, and a vertical portion 11d that is approximately perpendicular to the horizontal portion 11C.
The rearmost end 11e of 1c and the uppermost end 11f of the vertical part 11d
is curved so that the pivot pin 37 can be positioned.

This pivot pin 37 is immovably attached to the handle unit 3, and is attached to the coil portion 12a of the torsion coil spring 12.
is wrapped.

Both ends 12b of this torsion coil spring 12 are in contact with the magazine unit 2 and handle unit 3.

Therefore, before the staple is driven, the pivot pin 37 is moved to the shock absorbing hole 11 by the spring force of the torsion coil spring 12.
It is located at the uppermost end 11f of b.

The front end of the handle unit 3 is connected to the torsion coil spring 12.
The spring force maintains the driver 13 in a state where it is raised to the maximum limit relative to the stable punching hole 14 of the magazine body 5.

A load receiving plate 24 is disposed on the rear side (right side in FIG. 1) of the upper surface of the magazine cover 8, and a side surface 17 of the magazine cover 8 is disposed on the rear side of the lower surface of the magazine cover 8. Base plate for magazine body 15
is bent horizontally.

This magazine body support plate 15 is in contact with the bottom 5a of the magazine body 5.

The protective bottom portion 16 of the magazine cover 8 is formed in a tapered shape such that the height gradually increases from the rear to the front, and the tapered portion of the protective bottom portion 16 corresponds to the portion that hits the material to be driven.

A guard member 1 is provided at the front end of the magazine cover 8 and below.
8 is formed to bulge forward.

The front surface 13a of the driver 13 slides on the inner surface 19 of the guard member 18, and thereby the driver 13 is guided to strike the crown of the stable in the final stroke of driving the stable. .

Above the guard member 18 is a magazine body contact plate 2.
0 is vertically bent from both side surfaces 17 of the magazine cover 8 toward the front end.

A driver hanger 21 is formed above the magazine body contact plate 20.

The driver hanger 21 functions as an upper limit stopper for the driver 13 by hooking a hook portion 22 projecting forward from the lower end portion of the driver 13.

At the front end portion of the magazine body, the insertion side wall 23
is formed to be higher than the other side portion 26 of the magazine body 5.

The height of this insertion side wall 23 is such that the load bearing of the magazine cover 8 is equal to the inner width of the plate 24 and the support plate 15 for the magazine body, and the driver side guide of the magazine body 5 is the same as that of the magazine body of the magazine cover 8. It is inserted until it comes into contact with the contact plate 20.

Therefore, the upper end surface of the fitting side wall 23 is a load receiving plate 2.
4, and this load receiver completely absorbs the repeated impact load of the bumper member 25 applied to the plate 24.
will be supported by.

This fitting side wall 23 is provided with a locking pin fitting hole (not shown) at a location that coincides with a locking pin fitting hole 27 formed in the magazine cover 8 .

To remove these, insert a locking pin 28 into the insertion hole 27, etc.
is inserted.

This removal stopper pin 28 mainly functions to prevent the magazine cover 8 and the magazine body 5 from being displaced from each other in the longitudinal direction of the magazine body 5, and is designed to prevent vertical loads applied to the magazine cover 8. No cyclic impact loads are applied.

Therefore, the assembled state of the magazine body 5 and magazine cover 8 is such that almost no repeated load is applied in the transverse direction of the locking pin 28.

When the magazine cover 8 is worn out after long-term use, the magazine cover 8 can be easily removed from the magazine body 5 by removing the retaining pin 28 and replaced with a new magazine cover.

A tail plate 29 having an angled cross-section is disposed at the rear end portion of the magazine body 5.

The upper end portion of the magazine body 5 is open and the lid is closed by the slider 6.

Staple guide 7 built into magazine body 5
has a U-shaped cross section.

A support plate 30 is formed upright at the front end portion of the stable guide 7.

This support plate 30 also functions to guide the rear surface of the driver 13.

Further, a cut plate 32a serving as a cut block is horizontally bent from the side portion 31 of the stable guide 7 in contact with the upper end surface of the support plate 30.

A bushing 10 is disposed within the staple guide 7 so as to be movable along the longitudinal direction of the stable guide 7, and a compression coil shaped bushing spring 32 for pushing the bushing 10 is installed inside.

The rear end 32b of the button spring 32 is connected to the tail plate 29.
is in contact with.

As shown in FIG. 1, the bushing 10 has a bushing spring receiver portion 33 formed in a U-shape in cross section at its lower portion, and a projection portion 34 at its upper portion.

This protrusion 34 is guided by a long hole 9 provided in the slider 6, and has the function of smoothly moving the entire bushing 10.

A weight block 35 is provided at the tip of the handle unit 2.

A driver holding screw 36 is screwed onto this weight block 35.

The driver 13 is attached to the driver holding screw 36 so as to be movable laterally in the figure, and a bumper member 25 for hitting the plate 24 is fitted into the load receiver.

The function of the shock absorbing mechanism configured as above will be explained.

When the grip 4 of the hammer tacker 1 in the state shown in FIG. Driven into the pouring material.

When the magazine body 5 is driven in, the front end of the magazine body 5 is restricted by the driven material and the driver 13 and held immovably, so the handle unit 3 is restricted by the driver 13 and the guard member 18 of the magazine body 8. As a result, the magazine body 5 is slightly shifted backward (to the right in Fig. 1), and the rear end of the magazine body 5 also rotates counterclockwise in Fig. 1 due to the reaction of the magazine cover 8 hitting the workpiece. .

That is, as a result of the pivot pin 37 relatively moving within the shock absorption hole 11b from the uppermost end 11f to the rearmost end 11e, the impact on the handle unit 3 due to the reaction is absorbed by the shock absorption hole 1.
completely absorbed by 1b.

In the case of so-called right-angle driving in which the bottom part 5a of the magazine body 5 is completely driven into the workpiece, the pivot pin 37 moves downward from the uppermost end 11f almost along the vertical part 11d of the shock absorption hole 11b. This allows the shock to be absorbed.

As described above, the present invention can be used not only for right-angle driving, but also for normal staple driving work in which staples are driven by hitting only the tip of the hammer tacker against the workpiece at a predetermined angle; Even when the magazine unit of the hammer tacker is subjected to not only a vertical impact but also an oblique impact from the filling material, the pivot pin 37 is moved through the impact absorption hole 11.
By moving each vertex of 6 along the slope, it is possible to absorb the impact from the material to be driven and reduce noise.

In addition, as mentioned above, since the magazine body is movable in the horizontal direction, the magazine body moves as the driver swings when driving staples, and this causes the sliding movement between each member at the front end of the magazine body and the driver. Dynamic resistance can be reduced.

Therefore, the operator's hands are less fatigued and the workability of the hammer tacker is improved.

In addition, in particular, the shock absorption hole has a substantially triangular shape, and the pivot pin is always supported at one of the vertices of the triangle by the elastic means, so unnecessary rattling between the magazine unit and the handle unit is minimized. A stable connection state can be obtained.

Furthermore, in order to achieve this shock absorption, there are fewer parts compared to conventional hammer tackers, so the manufacturing cost of the hammer tacker can be lowered.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a hammer tacker equipped with the shock absorbing mechanism of the present invention. 1...Hammer tacker, 2...Magazine unit, 3...Handle unit, 11...
...Tail hanger, 11b...Shock absorption hole, 11c...Side part of shock absorption hole, 11d...
... Vertical part of shock absorption hole, 12 ... Torsion coil spring, 13 ... Driver, 14 ... Stable punching hole, 35 ... Weight block, 3
7...Pivotal pin.

Claims (1)

[Scope of utility model registration request] A tail hanger is integrally provided at the rear end of the magazine unit, which is arranged parallel to a handle unit having a weight block and a driver at its front end, and from which the stables are ejected one by one from the stable ejection hole at the front end by the driver. , a substantially triangular shock absorption hole is bored in the tail hanger, a pivot pin is loosely inserted into the shock absorption hole, and is fixedly supported on the handle unit;
A shock absorption mechanism in a hammer tacker, wherein a magazine unit is elastically supported on the handle unit by an elastic means.