JPS6147670B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a stapler, and relates to one that uses a small electric motor driven by a battery, for example.

(Prior Art) Various types of electric staplers have been proposed in the past, but most of them are equipped with a needle ejecting blade that can be moved up and down, for example, to push out a needle stored in a needle storage case. This needle punching blade
The needle is moved up and down by a cam rotated by an electric motor connected to a commercial power supply and a crank arm connected between the cam and the needle ejecting blade.

(Problems to be solved by the invention) In the electric stapler configured as above,
Since the needle ejecting blade is lowered by the traction force of the crank arm that is linked with the rotation of the cam, the needle ejecting blade is sequentially lowered at a predetermined speed depending on the rotational speed of the cam. The pushing out of the needle and the binding work of the members to be bound are relatively slow and lacking in speed, and the raising operation of the needle ejecting blade is also raised sequentially and is slow.
There is a problem in that waiting time is required to handle the members to be bound after binding, which poses problems in workability and gives an unfavorable impression of inefficiency in appearance. In addition, if the material to be bound is thick, the operation of the crank is constant, so it is necessary to add an escape mechanism that responds to changes in the thickness of the material to be bound, making the structure complicated. When a small electric motor is used, it is forced to slow down due to insufficient power, and the above-mentioned operation becomes even slower, making it difficult to obtain a practically satisfactory operation and making it impossible to perform reliable and sufficient binding work. There are problems such as missing.

Therefore, the present invention has been made in view of the above points, and it is possible to instantaneously stitch together the members to be bound with a binding needle without being affected by the thickness of the members to be bound. It is an object of the present invention to provide a stapler that can instantly take out a stapler from a binding section and can efficiently and continuously staple stapled members.

[Structure of the invention]

(Means for Solving the Problems) The stapler of the present invention has a main body frame 1 to which a needle holder 22 having a needle bending groove 21 is fixed, and the bottom of the distal end thereof is spaced apart and communicates with the needle bending groove 21. A needle storage case 1 having a needle push-out groove a and a slider 15 that can move forward and backward to push the needle 14 into the needle push-out groove a.
2, and has a pressure receiving plate 19 at the upper part of the tip of the needle storage case 12, and this pressure receiving plate 19
A lifting arm 1 having a needle ejecting blade 20 for ejecting the needle 14 from the needle ejecting groove a to the needle bending groove 21 at the lower part of the arm.
6 is provided so as to be freely raised and lowered, and has a striking body 32 at the tip end of the lifting arm 16 for hitting the pressure receiving plate 19 downward, and has a locking part 29 at the lower end, and the striking body 32 is always moved in the downward direction. spring 35
A striking arm 25 energized by is provided so as to be movable up and down, and has an engaging pin 45 on the main body frame 1 that engages and disengages from the locking portion 39 of the striking arm 25, and this engaging pin 45 engages the spring 35. A braking body 44 is rotatably provided to interlock the striking arm 25 and pull up the striking body 32 above the pressure receiving plate 19 against the pressure. An electric motor 6 that rotates is provided,
A switch lever 48 has a pushing part 50 protruding from one side of the needle holder 22 on the electric motor 6 so as to be movable back and forth.
A switch 55 that is opened and closed by a switch 55 is electrically connected to the main body frame 1 and the brake body 44 is connected to the switch 55 .
The striking body 32 via the striking arm 25
A release body 46 is rotatably provided with a release pin 47 that releases the switch lever 48 so that the switch 55 is opened when the switch lever 48 is pulled up.

(Function) According to the stapler of the present invention, the main body frame 1
When a member to be bound is inserted from the front between the needle holder 22 and the tip of the needle storage case 12, the pushing part 50 of the switch lever 48 is pushed by the inserted end of the member to be bound. At the same time, the switch lever 48 is moved from the front to the rear, and the operation of the switch lever 48 closes the switch 55 and starts the electric motor 6. Also, this electric motor 6
When the brake body 44 is operated, the brake body 44 is rotated via the gear interlocking mechanism 43, and the engagement pin 45 of the brake body 44 is engaged with the locking recess 39 of the striking arm 25 while being engaged with the spring 35. At the same time, the engaging pin 45 is removed from the locking recess 39 by pulling and rotating it, and at the same time, the striking arm 25 is rotated downward by the restoring force of the spring 35, and the striking body 32 of this striking arm 25 is rotated downward. The pressure receiving plate 19 of the lifting arm 16 is instantly struck, and the needle driving blade 20 of this pressure receiving plate 19 drives the first needle 14 directly below from the needle pushing groove a, and both legs of this needle 14 drive into the member to be stitched. The needle bends through the needle bending groove 21 and is bent onto the back surface of the member to be bound.

In addition, the brake body 44 continues to rotate and the engagement pin 45
When the is rotated approximately half a turn, the engaging pin 45 again engages in the locking recess 39 of the switch lever 48, and the rotation of the engaging pin 45 causes the striking arm 25 to be pulled against the spring 35. interlockingly, this striking body 32 is pulled up above the pressure receiving plate 19,
Along with this, the needle ejecting blade 20 of the lifting arm 16 is also pulled up from the needle storage case 12. Further, as this needle ejecting blade 20 is pulled up, the slider 15 of the needle storage case 12 moves forward to bring the second needle 14 forward to face the needle ejecting groove a in preparation for the next ejecting.

Further, along with the above-mentioned operation, the release body 46 also releases the brake body 4.
4, the release pin 47 of the release body 46 is rotated slightly behind the engagement pin 45 of the brake body 44, and therefore the engagement pin 4
5 pulls up the impacting body 32 to a predetermined height position as described above, the release pin 47 pushes the switch lever 48 to release its hold, opens the closed switch 55, and releases the electric motor. Stop the operation of step 6. And the push part 50 of the switch lever 48
is rotated back to the front in preparation for the next spelling operation.

(Embodiment) Next, the configuration of an embodiment of the present invention will be described based on the accompanying drawings.

In the figure, reference numeral 1 denotes a main body frame, and both front and rear side plates 2 and 3 of this main body frame 1 are integrally hung facing each other, and the lower ends of the front and rear side plates 2 and 3 are provided with suction cups, respectively. 4 is installed. Further, an electric motor 6 is fixed in a U-shaped support frame 5 fixed between the side plates 2 at the front of both sides, and a battery case 7 made of synthetic resin is mounted between the side plates 3 at the rear of both sides. Four batteries 8 electrically connected to the electric motor 6 are housed in the battery case 7 .

Next, a U-shaped connecting frame 9 is fixed to the rear upper part of the main body frame 1, and the rear end of the guide frame 10 is attached to the horizontal axis 1.
A needle storage case 12 is inserted into the guide frame 10 so as to be freely rotatable in the vertical direction, and a knob 13 is protruded from the tip of the needle storage case 12. A needle extrusion groove a is formed at the bottom of the tip of the needle storage case 12. Also, this needle storage case 12 contains a needle 1.
A U-shaped slider 15 that constantly pushes the slider 4 toward the tip is attached so as to be movable forward and backward.

Further, a rear end portion of a lifting arm 16 formed in a U-shape is pivotally attached to the horizontal shaft 11 so as to be freely rotatable in the vertical direction, and one end portion of a coil spring 17 is locked to the rear end portion of this lifting arm 16. In addition to being
The other end of this coil spring 17 is connected to a guide roller 18 which is suspended horizontally at the tip of the lifting arm 16.
It is locked to the slider 15 via.
The coil spring 17 always urges the slider 15 forward to push the needle 14 toward the tip. Further, a pressure receiving plate 19 is formed in a substantially horizontal shape at the top of the tip of the lifting arm 16, and at the bottom of this pressure receiving plate 19, the first needle 14 stored in the needle storage case 12 is pushed downward from the needle extrusion groove a. A needle holder 22 is provided with a needle bending groove 21 to which a needle ejecting blade 20 for ejecting the needle is vertically fixed, and a needle bending groove 21 for supporting and bending the foremost needle 14 pressed by the needle ejecting blade 20 downward. It is fixed to the top of the main body frame 1.

Furthermore, the horizontal shaft 11 has the needle storage case 12.
Lever 23 that locks and releases this lock.
is rotatably attached via a spring member.

Next, guide long grooves 24 are formed in the front and back direction in the main body frame 1 on both sides in the width direction of the connection frame 9, and within the guide long grooves 24 on both sides, striking arms 25 are formed in a generally L shape when viewed from the side. The support pieces 26 on both sides are inserted through the support pieces 26.
The upper part of the striking arm 25 is rotatably pivoted in the vertical direction via a horizontal shaft 28 to a mounting piece 27 that protrudes upwardly from the connecting frame 9. The rear end of an arm plate 30 is integrally fixed to the top plate 29 connected to one end, and a weight 31 as a striking body is integrally attached to the tip of this arm plate 30. A striking body 32 for striking the pressure receiving plate 19 is integrally provided on the lower surface. Further, locking pieces 3 protruding from both sides of the arm plate 30 of the striking arm 25 are provided.
A coil spring 34 is stretched between the lifting arm 3 and both sides of the lifting arm 16, and the coil springs 34 on both sides keep the lifting arm 16 at a predetermined height, that is, the needle driving blade 20 is in contact with the needle 14. It is designed to not hold at any height. Further, between the locking pieces 33 on both sides of the arm plate 30 and the main body frame 1, there are tension springs 3 as springs.
5 is tensioned, and tension springs 35 on both sides always urge the striking body 32 in the downward direction via the arm plate 30. Further, the rear end of an interlocking piece 37 is rotatably attached between the lower ends of the support pieces 26 on both sides of the striking arm 25 via a support shaft 36, and the upper end of the interlocking piece 37 is provided with a guide. Recess 38 and locking recess 39 as a locking portion
are formed in the front-rear direction, and one end of a coil spring 40 wound around the support shaft 36 is locked to the interlocking piece 37, and the other end is locked to the support pieces 26 on both sides. ing. The interlocking piece 37 is always urged upward by the coil spring 40. Furthermore, a stopper plate 60 with which the rear end 37b of the interlocking piece 37 engages is installed on the inner side of the battery case 7.

Next, a drive shaft 41 is rotatably mounted horizontally on the support frame 5, and a gear interlocking mechanism 43 meshed with a pinion of the electric motor 6 is engaged with an interlocking gear 42 fixed to the drive shaft 41. There is. Further, a disk-shaped brake body 44 is fixed to the drive shaft 41, and this brake body 44 is removably engaged in the locking recess 39 of the interlocking piece 37, and when engaged therewith, the interlocking piece An engagement pin 45 that pulls the drive shaft 41 is provided in a protruding manner parallel to the drive shaft 41 . Further, an eccentric cam 61 is integrally formed around the axis of the drive shaft 41, with which the tip end 37a of the interlocking piece 37 engages. Furthermore, a disc-shaped release body 46 is fixed to the drive shaft 41, and the release body 46 rotates with a release pin 47 parallel to the drive shaft 41 and behind the engagement pin 45 of the brake body 44. They are protruded and positioned at the rear in the rotational direction, with the phase shifted by a predetermined angle. Further, a switch lever 48 is pivotally attached to the front part of the support frame 5 via a support shaft 49 so as to be freely rotatable in the front and rear direction. It passes through a longitudinally long guide groove 51 formed on one front side, that is, on one side of the needle holder 22, and projects upward. In addition, the switch lever 48
An interlocking plate 52 as a switch lever is provided at the lower end of the
One end of the interlocking plate 52 is pivotally attached to a shaft 53 so as to be rotatable in the vertical direction, and the interlocking plate 52 is always positioned upwardly, that is, on the support frame 5 side, between the other end of the interlocking plate 52 and one end of the main body frame 1. A tension spring 54 is tensioned. Further, a micro switch 55 as a switch is fixed to the support frame 5, and a pushing piece 5 that opens and closes an opening/closing contact piece 56 of this micro switch 55.
7 is provided protrudingly in the middle of the interlocking plate 52, an engaging piece 58 is protrudingly provided on the other end side of the interlocking plate 52, and a locking protrusion 59 to which this engaging piece 58 engages and disengages is attached to the support frame 5. It is fixed to the rear end of. The engaging piece 58 of the interlocking plate 52, which is energized by the tension spring 54, is always engaged with the lower part of the locking protrusion 59, and the pushing piece 57 is connected to the opening/closing contact piece 56.
The electric motor 6 is operated by the operation of the micro switch 55.

Next, the operation of the above configuration will be explained.

Needle holder 22 of main body frame 1 and needle storage case 1
When a member to be bound, such as stacked paper sheets, is inserted from the front between the needle extrusion groove a at the tip of the switch lever 48
0 is pushed and this switch lever 4
8 is rotated by moving from the front to the rear of the guide slot 51 with the support shaft 49 as a fulcrum, and the interlocking plate 52 pivotally attached to the lower end of the switch lever 48 via the shaft 53 is connected to the tension spring 54. It is linked to be pulled forward against the Further, due to this movement of the interlocking plate 52, the engaging piece 58 is disengaged from the lower end surface of the locking protrusion 59, and the interlocking plate 52 is moved from the shaft 5 by the tension of the tension spring 54.
3 as a fulcrum and is pulled upward toward the main body frame 1 side, and the engaging piece 58 is locked inside the locking protrusion 59. In addition, the movement of the interlocking plate 52 causes the pushing piece 57 to
pushes the open/close contact piece 56 of the micro switch 55, the open/close contact piece 56 is rotated, the micro switch 55 is closed, and the electric motor 6 is started. Further, when the electric motor 6 operates, the interlocking gear 52 is rotated via the pinion and gear interlocking mechanism 43, and the drive shaft 4 of the interlocking gear 42 is rotated.
1 is rotated. Further, the brake body 44 is rotated by the rotation of the drive shaft 41, and the brake body 44 is also rotated.
While the engaging pin 45 of the interlocking piece 37 remains engaged with the locking recess 39 of the interlocking piece 37 attached to the striking arm 25, the interlocking piece 37 is pulled and rotated while resisting the tension spring 35, so that the engaging pin 45 is engaged. At the same time as it is removed from the stop recess 39, the striking arm 25 is rotated back around the horizontal shaft 28 by the restoring force of the tension springs 35 on both sides, and the arm plate 30 of the striking arm 25 is rotated downward. . And this arm plate 30
With this rotation, the guide frame 10 having the lifting arm 16 suspended by the coil spring 34 and the needle storage case 12 is rotated downward about the horizontal shaft 11, and the interlocking piece 37 is also moved rearward. Therefore, the needle extrusion groove a of the needle storage case 12 is lowered and superimposed on the predetermined position of the member to be bound, and the foremost needle 14 stored in this needle storage case 12
With the needle ejection blade 20 positioned above, the pressure receiving plate 19
is struck downward by a striking body 32 having a weight 31. That is, due to the forcible downward rotation of the arm plate 30 by the tension springs 35 on both sides and the interaction of the arm plate 30 with the striking body 32 having the weight 31, the engagement pin 45 is released from the locking recess 39. At the same time as the pressure receiving plate 19 is separated, it is instantaneously hit hard by the striking body 32, and the needle ejecting blade 20 of the pressure receiving plate 19 pushes the foremost needle 14 directly below into the needle ejecting groove a.
Both sides of the needle 14 are driven into the member to be bound and penetrated, and the lower ends of both legs are attached to the needle holder 2.
are bent inwardly by the needle bending grooves 21 of 2,
The needle 14 is used to stitch the members to be bound.

Further, as the brake body 44 continues to rotate and the tip 37a of the interlocking piece 37 rides on the peak of the eccentric cam 61, the rear end 37b of the interlocking piece 37 engages with the stopper plate 60, and the interlocking piece 37 moves onto the support shaft 36. The actuating pieces 26 on both sides are pushed forward and the arm plate 30 is returned slightly upward. Therefore, immediately after the impact, the gap between the needle holder 22 and the tip of the needle storage case 12 is rotated. The pressure is slightly released.

Further, the brake body 44 is further rotated, and the engagement pin 45
When the is rotated approximately half a turn, the engaging pin 45 again engages in the locking recess 39 of the interlocking piece 37, and the rotation of the engaging pin 45 causes the interlocking piece 37 to resist the tension spring 35. This interlocking piece 3
The striking arm 25 attached to the striking arm 7 via a support shaft 36 is rotated about the horizontal shaft 28 as a fulcrum, and the weight 31 of the arm plate 30 of this striking arm 25 and the striking body 32 are further lifted up. In addition, by lifting and rotating the arm plate 30, the guide frame 1, which has the lifting frame 16 and the needle storage case 12 attached thereto via the coil spring 34,
0 is also pulled up, and the needle holder 22 and needle storage case 12
The space between the tips is open. In addition, since the release body 46 of the drive shaft 41 is rotated at the same time as the brake body 44 along with the operation, the release pin 47 of the release body 46 is rotated slightly behind the engagement pin 45 of the brake body 44. Therefore, the engagement pin 4
5 remains engaged in the locking recess 39 of the interlocking piece 37, and the arm plate 3 of the striking arm 25 includes the weight 31 and the striking body 32.
0 is pulled up to a predetermined height position, the release pin 47 of the release body 46 pushes the engagement piece 58 of the interlocking plate 52, and the interlocking plate 52 moves downward against the tension spring 54. The interlocking plate 52 is pushed out, and at the same time the engaging piece 58 of the interlocking plate 52 is removed from the inside of the locking protrusion 59, the interlocking plate 52
2, and the engaging piece 58 is again engaged with the lower end surface of the locking protrusion 59. Also, this interlocking plate 52
Due to the lowering and pulling operation of the interlocking plate 52,
The pressing of the opening/closing contact piece 56 by the pushing piece 57 is released, the micro switch 55 is opened, and the operation of the electric motor 6 is stopped. Also, the interlocking plate 52
With this operation, the switch lever 48 is pulled by the interlocking plate 52 and rotated, and the pushing part 50 of the switch lever 48 is rotated.
is rotated and restored to the front part of the guide long groove 51 in preparation for the next binding operation.

〔Effect of the invention〕

According to the present invention, by strongly hitting the pressure plate with the striking body, the needle ejecting blade of the pressure plate is forcibly lowered by the impact, and the needle is reliably penetrated into the member to be bound. The members to be bound can be bound instantly. Further, by driving the needles with the strong striking force of the striking body, the members to be bound can be reliably bound with one blow without being affected by the thickness of the members to be bound. Furthermore, the lowered striking body is momentarily pulled up above the pressure receiving plate through the striking arm by the rotation of the brake body, and can be reliably held at a predetermined height position. Therefore, the descending movement of the needle ejecting blade does not slow down, and the members to be bound can always be instantly and reliably and sufficiently stapled, and the members to be bound after being stapled can be quickly pulled out. In addition, the material to be bound is inserted onto the needle holder, and the material to be bound pushes the switch lever and closes the switch, and at the same time the electric motor is started. By stopping at , the members to be bound can be efficiently and continuously bound. Therefore, we have developed a stapler that can perform the actual binding work of stapled parts with high efficiency and greatly improve work efficiency, and can also emphasize the appearance of high efficiency. can be provided.

[Brief explanation of the drawing]

The figures show one embodiment of a stapler embodying the present invention. Figure 1 is a perspective view of the stapler,
The figure is a bottom view of the same as above, FIG. 3 is a side view of the drive mechanism of the same as above, FIG. 4 is an explanatory diagram of the gear interlocking mechanism as above,
FIG. 5 is an explanatory view of the operation of the striking body, and FIG. 6 is a side view of the switching mechanism. 1... Body frame, 6... Electric motor, 12...
Needle storage case, 14... Needle, 15... Slider, 16... Lifting arm, 19... Pressure receiving plate, 20
... Needle ejection blade, 21 ... Needle bending groove, ... Needle holder, 2
5... Hitting arm, 31... Weight, 32... Hitting body, 35... Spring, 39... Locking part, 43
... Gear interlocking mechanism, 44 ... Braking body, 45 ... Engagement pin, 46 ... Release body, 47 ... Release pin, 4
8...Switch lever, 50...Pushing body, 55...
...Switch, a...Needle extrusion groove.

Claims (1)

[Scope of Claims] 1. A main body frame to which a needle holder having a needle bending groove is fixed, a needle extrusion groove provided on the main body frame and connected to the needle bending groove at a bottom portion of the distal end thereof, and a needle extrusion groove. a needle storage case having a slider that can move forward and backward to push the needle; a needle storage case that is movable up and down with respect to the needle storage case and has a pressure plate at the top of the tip; an elevating arm having a needle ejecting blade ejected into the needle curved groove; a striking body movable up and down with respect to the elevating arm; a striking body for downwardly striking the pressure receiving plate at the tip; and a locking portion at the lower end. a striking arm having a striking body constantly biased in a downward direction by a spring; and an engaging pin rotatably provided on the main body frame to engage with and disengage from a locking portion of the striking arm; a braking body that interlocks the striking arm against the spring with a dowel pin to pull the striking body above the pressure receiving plate; and an electric motor provided on the main body frame that rotates the braking body via a gear interlocking mechanism. , a switch that is electrically connected to the electric motor and is opened and closed by a switch lever having a pushing part protruding from one side of the needle holder so as to be freely movable back and forth; and a switch that is rotatably provided on the main body frame. and a release body having a release pin that releases the holding of the switch lever so that the switch is opened when the striking body is pulled up via the striking arm by the braking body. Stepler.