JPH0536200B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is capable of electrically perforating relatively thick documents such as slips and data sheets, which are made up of a large number of stacked sheets, and if necessary, binding them together. The present invention relates to a drilling device that can also be used for drilling.

<Prior Art> As is well known, manual punching devices have limitations in punching relatively thick documents made of a large number of stacked sheets. Therefore, an electric drilling device using a motor is known (for example, Japanese Utility Model Application Publication No. 103608/1983). This conventional electric drilling device has a drilling blade as the first
A motor rotates the punch at high speed, and a second motor moves the punching blade up and down. In order to perforate thick documents using the above-described perforation device, the perforation blade located in the highest position is rotated at high speed by the first motor and lowered by the second motor, so that the rotational force and descending force of the perforation blade are adjusted. to make a hole, and when the punching blade reaches its lowest position, raise it and remove it from the document.

<Problems to be Solved by the Invention> In the conventional perforating device described above, the perforating blade rotates at high speed during perforation, so the area around the perforated part of the paper may be scorched due to the frictional heat of the perforating blade. Since high heat acts on it, it becomes brittle and its drilling ability decreases significantly when used for a long period of time. In addition, since the blade rotates at high speed during perforation, a rotational force is applied to the entire document, and if the upper sheet is not firmly pressed over the entire surface, it will rotate and tear, making it extremely difficult to use.
Moreover, chips are generated during drilling and are scattered around.

By the way, in the conventional drilling device as described above, generally, a pair of drilling blades is used to drill two holes at a constant interval.
Each hole is drilled at the same time. However, depending on the document, the left and right sides may have different thicknesses, and it is difficult to use conventional punching devices for such documents. For example, a print is attached to one corner of a document in a financial institution, etc., and when these documents are stacked, the thickness of the part to which the stamp is attached increases, causing an imbalance in the thickness between the left and right sides. If you use a conventional punching device to bind and store such documents, the balance of the load applied to the left and right punching blades during punching will be disrupted, resulting in non-vertical forces being applied. If the punching blade is bent or severely damaged, it is very dangerous.

<Means for Solving the Problems> The present invention has been proposed in view of the above, and is a perforating device that perforates documents by driving an electric drive source, and includes a pair of guide rods erected on a base frame. and an elevating body that has a rotatably erect male threaded rod, a drive source for rotating the male threaded rod in forward and reverse directions, and a female threaded portion that is screwed to the male threaded rod, and that can be raised and lowered by being guided by a guide rod. , a cylindrical perforation blade replaceably provided on the elevating body;
The lifting body has a storage case that communicates with the inner hole of the cylindrical perforating blade through a hole formed in the lifting body, and is detachably attached to the lifting body, and a flange that can be locked to the upper end of the lifting body. A pair of pressing rods that can be slid vertically against each other, a coil spring that biases each pressing rod downward, and a guide hole provided at the lower end of each pressing rod through which a cylindrical drilling blade can pass. It is also equipped with a pressing piece that can individually press the top surface of the document around the perforation position, and when the elevating body is lowered and perforated by the rotation of the drive source, the unbalance that occurs on the top surface of the document is corrected by the pressing rod. The document is absorbed by sliding upward, and the document is pressed via a pressing piece by the urging of a coil spring.

<Operation> The elevating body is lowered by a male threaded rod that rotates with the rotation of the drive source, and a pair of cylindrical punching blades provided downward on the elevating body perforate documents placed on the top surface of the underframe. The left and right pressing rods, which are equipped with pressing pieces and urged downward, can press the perforated portion of the document separately, and after perforating the document, the male threaded rod is rotated in the opposite direction to remove the perforating blade from the document. It can be removed. Further, drilling waste can be collected into the storage case through the inner hole of the drilling blade and the through hole of the elevating body.

<Example> Hereinafter, the present invention will be described with reference to an example shown in the drawings.

The drilling device 1 according to the present invention has a male screw rod 5 rotatable by a guide rod 3 and a drive source 4 on the upper surface of the underframe 2.
A vertically movable elevating body 6 is loosely fitted into the guide rod 3.

According to the illustrated embodiment, the guide rod 3 is a pair of left and right cylinders, the lower end of which is fixed upright to the underframe 2 with a lower bolt 7, and the upper end fixed to the upper frame 9 with an upper bolt 8. .

Further, the male threaded rod 5 has a lower portion 10 rotatably supported by a bearing mechanism 11 provided on the underframe 2, and a large gear 12 is provided at the lower end of the male threaded rod 5. This large gear 12 and the housing 1 as the drive source 4
The output shaft 14' of a motor 14 installed in the motor 3 is connected to a small gear 15 provided thereon by an endless belt 16. In the illustrated embodiment, the front side of the bearing mechanism 11 and the male threaded rod 5 is covered with a front plate 13'.

An elevating body 6 that loosely fits into the pair of guide rods 3, 3.
In this case, side parts 19, 19 are provided on the left and right sides of a base 18 having a female threaded part 17, and a protrusion 20 is provided in front of the base 18. A sliding hole 21 opening in the vertical direction is provided in the side portion 19 in correspondence with the guide rod 3.

A receiving portion 23 for the perforating blade 22 is provided on the lower surface of the protruding portion 20 of the elevating body 6. The receiving portion 23 has a through hole 24 passing through the protruding portion 20 in the vertical direction, and a socket 25 with an enlarged diameter is provided at the lower end portion of the through hole 24 . Further, the upper end of the through hole 24 communicates with a discharge port 26 provided at the upper stage of the protrusion 20. This discharge port 26 has an enlarged front surface. A screw 27 faces the socket 25 from the front, and a mounting portion 28 is provided at the upper end of the cylindrical drilling blade 22.
By tightening the screw 27 into the groove 29, the perforating blade 22 is attached downward and replaceable.

In the illustrated embodiment, a first receiving portion 23a located on the inside and a second receiving portion 23b located on the outside are provided on both sides of the protruding portion 20, and the respective receiving portions 23a, 2
3b can be appropriately selected to adjust the perforation interval.

Further, on the left and right sides of the elevating body 6, there are provided pressing rods 31 which are provided with pressing pieces 30 at their lower ends and urged downward. The pressing piece 30 is a slightly horizontally elongated plate material, and the pressing piece 30 has a mounting hole 32 and two guide holes 3.
3 and 33 are set up in parallel. This pressing piece 3
0 to the lower end of the circumferential pressing rod 31 to the receiving screw member 34.
and is attached via a spacer member 35. That is, the receiving screw member 34 screwed onto the lower end of the pressing rod 31
Then, a mounting screw 34' passed through the mounting hole 32 of the pressing piece 30 from below is screwed into the mounting hole 32 of the pressing piece 30 with a spacer member 35 interposed therebetween. Note that the spacer member 35 is similar to the holding member 36 and the pressing piece 3 provided in the illustrated embodiment.
This provides an interval between 0 and 0. The holding member 36 is used to prevent the perforating blade 22 from swinging back and forth and from side to side, and is fixed to the two first holding plates 36a and the second holding plate 36b in an overlapping manner with fixing screws 37. It becomes. In each holding plate 36a, 36b, notches 38 corresponding to the spacing between the punching blades 22 are provided on front and rear sides with different opening sides. Therefore, when changing the interval between the perforating blades 22, if the fixing screw 37 is warmed and each retaining plate 36a, 36b is rotated back and forth, the cutting edge of the perforating blade 22 is aligned with the retaining member 36.
I never get used to it. An inner rod 39 whose upper end is fixed to the upper frame 9 is loosely fitted inside the pressing rod 31, and a coil spring 40 is mounted around the inner rod 39.
When the coil spring 40 is wound and the lower end is pressed against the receiving screw member 34 screwed onto the pressing rod 31, the pressing piece 30 is urged downward by the coil spring 40. Further, the guide hole 33 of this pressing piece 30 faces the perforating blade 22 attached downward to the elevating body 6.

A flange portion 41 that can be locked onto the upper surface of the elevating body 6 is provided at the upper end of the pressing rod 31. Therefore, when the elevating body 6 rises due to the rotation of the male threaded rod 5, the collar portion 41 and the upper surface of the elevating body 6 are engaged, so that the pressing rod 31 rises and the pressing piece 30 also rises. On the other hand, when the elevating body 6 descends, it descends together with the elevating body 6 until the pressing piece 30 comes into contact with the top surface of the document a, and when the pressing piece 30 contacts the document a, the elevating body 6 independently pierces the hole. while descending. At this time, the pressing piece 30 presses the upper surface of the document a due to the bias of the coil spring 40.

In the punching device 1 according to the present invention, the above-mentioned actions are performed on the left and right pressing pieces 30 and the pressing rods 31, respectively, and the left and right pressing pieces 30 press the document a independently, so that Even if a lateral imbalance occurs in the thickness t of the document a, this imbalance can be absorbed by the retreat of the pressing rod 31, and the document a can be reliably pressed through each pressing piece 30.

On the front side of the protrusion 20 of the elevating body 6, there is a storage case 4 whose back side is open and communicates with the discharge port 26.
2 is detachably provided. This storage case 42 receives paper scraps rising inside the cylindrical punching blade 22, and collects the scraps in the storage case 42 without scattering them around.

The punching device 1 according to the present invention has the above-described configuration, and in a normal non-use state (or standby state), the first
As shown in FIG. 2, FIG. 5, etc., the elevating body 6 is in the highest state. In this state, the pressing piece 30 is urged to descend by the coil spring 40, and the flange 41 of the pressing rod 31 is locked to the upper surface of the elevating body 6, so that the elevating body 6 is urged to descend. However, since the female threaded portion 17 is screwed into the male threaded rod 5, the elevating body 6 does not descend. In addition, the elevating body 6
A perforating blade 22 provided downward on the lower surface of the protrusion 20 of
The cutting edge faces the guide hole 33 of the pressing piece 30. At this time, the vicinity of the lower end of the punching blade 22 is the combined notch 38, 3 of each holding plate 36a, 36b.
8, it is held in a predetermined position so that it can move up and down without swinging back and forth, left and right.

From this state, in order to perforate a relatively thick document a placed at a predetermined position on the upper surface of the underframe 2, turn on the power switch (not shown) and enter the standby state (in this state, the (The pilot lamp 44 on the operation panel 43 lights up), then the start switch 45 is operated to drive the motor 14 and rotate the male threaded rod 5 via the endless belt 16. When the male screw rod 5 rotates in one direction, the elevating body 6 gradually descends along the guide rod 3 due to the screwed female screw portion 17. Then, as the elevating body 6 descends, the left and right pressing rods 31 descend one after another, and when the lower surface of the pressing piece 30 comes into contact with the upper surface of the document a, the lowering of the pressing piece 30 stops. However, as the elevating body 6 continues to descend further, the collar portion 41 and the upper surface of the elevating body 6 are disengaged, and the pressing piece 30 presses the upper surface of the document a due to the bias of the coil spring 40. At this time, even if the thickness t of document a is different on the left and right sides (t1≠t2),
Each pressing piece 30 presses a corresponding position on document a. Therefore, in document a, the perforated portion is connected to each pressing piece 30.
They are each firmly pressed down and do not collapse or move. As the elevating body 6 further descends due to the continuous rotation of the male threaded rod 5, the pressing force against the document a by the pressing piece 30 becomes stronger, and the punching blade 22 passes through the guide hole 33 of the pressing piece 30. Since it descends vertically, document a is gradually pressed and perforated from above.

At this time, paper scraps generated by punching accumulate inside the punching blade 22, but by repeating the punching operation, new scraps are successively pushed upward and discharged into the storage case 42 through the through hole 24. , there is no scattering of debris.

When the elevating body 6 reaches the lowest position as shown in FIG.
contacts the reversing switch 47 at the position shown by the broken line in FIG. 6, and the motor 14 is driven in the opposite direction. Therefore, when the male threaded rod 5 is reversed and the elevating body 6 gradually rises, and the lower end of each punching blade 22 is removed from the upper surface of the document a and positioned above, the collar of the pressing rod 31 is attached to the upper surface of the elevating body 6. The portion 41 is locked and the pressing piece 30 is raised together with the elevating body 6. Then, when the elevating body 6 reaches its highest state, the operating piece 46 comes into contact with the stop switch 48, and the driving of the motor 14 is stopped, resulting in a standby state.

In the illustrated embodiment, a stop switch 49 and a lift switch 50 are provided on an operation panel 43 provided on the front surface of the drilling device 1, so that stopping and raising operations can be performed even during the drilling operation. Further, an auxiliary underframe 51 is extended in front of the underframe 2 to facilitate the placement of large documents, and a slide stand 52 is provided to enable movement in the front-rear direction. A clamping piece 54 having a loose fitting opening 53 is provided on the slide table 52 so as to be movable up and down below each pressing piece 30, and when the pressing piece 30 is lowered, the clamping piece 54 is moved upwardly and downwardly. At the same time, the punching blade 22 passes through the loose fitting opening 53 and punches the hole.

Although the present invention has been described above with reference to the embodiments shown in the drawings, the present invention is not limited to the above-described embodiments, and can be implemented with appropriate modifications as long as the configuration described in the claims is not changed. .

<Effects of the Invention> In summary, the present invention has a pair of guide rods erected on an underframe, a male threaded rod erected rotatably, a drive source for rotating the male threaded rods in forward and reverse directions, and a screw threaded on the male threaded rods. An elevating body that has a mating female thread and can be raised and lowered by being guided by a guide rod, a cylindrical perforating blade that is replaceably provided on the elevating body, and a cylindrical perforating blade that is inserted through a through hole in the elevating body. A storage case that communicates with the inner hole of the lift body and is detachably attached to the lift body, and a pair of presses that have a flange that can be locked to the upper end of the lift body and that are slidable in the vertical direction with respect to the lift body. It has a rod, a coil spring that biases each pressing rod downward, and a guide hole provided at the lower end of each pressing rod through which a cylindrical punching blade can pass, and presses the top surface of the document around the punching position individually. The left and right pressing pieces can press the top surface of the document by the coil spring bias and the lowering of the elevating body, which not only stabilizes the document when punching, but also Documents can be reliably pressed even if there is an imbalance in thickness between the left and right sides. Further, since no force other than the vertical direction is applied to the punching blade, a safe punching device can be provided in which the punching blade is not bent or damaged. Further, according to the present invention, debris generated during drilling can be collected into the storage case through the inner hole of the cylindrical punching blade, and the debris does not dissipate, which has extremely high practical value.

Moreover, according to the present invention, the area around the perforated part of the document will not be scorched or torn due to the frictional heat generated by the rotation of the perforation blade, the durability of the perforation blade will be improved, and the elevating body can be moved up and down by the screw mechanism. This applies a strong pressing force to the punching blade, making it easy to punch even thick documents.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view, and FIG. 2 is a front view with a part of the right side cut away.
Fig. 3 is a plan view with the right side cut out, Fig. 4 is an exploded perspective view of the main parts, Fig. 5 is a sectional view taken along the - line in Fig. 3 with the elevating body in an elevated state, and Fig. 6
The figure is a schematic explanatory view showing the front of the elevating body inside the housing, Figure 7 is a front view of the state in use, Figure 8 is a sectional view of the pressing piece in contact with the top surface of the document, and Figure 9 is the punching blade. is a cross-sectional view of a state in which the cutting edge has reached the underframe after perforating a document. DESCRIPTION OF SYMBOLS 1...Drilling device, 2...Underframe, 3...Guide rod, 4...Drive source, 5...Male threaded rod, 6...Elevating body, 17...Female threaded rod, 22...Drilling blade, 24...
...Through hole, 30...Press piece, 31...Press rod, 33
... Guide hole, 40 ... Coil spring, 42
...Storage case.

Claims (1)

[Scope of Claims] 1. A perforating device for perforating documents by driving an electric drive source, which comprises a pair of guide rods erected on a base frame, a male screw rod rotatably erected, and a male thread. A drive source that rotates the rod in forward and reverse directions, an elevating body that has a female threaded part that is screwed into the male threaded rod and can be raised and lowered while being guided by the guide rod, and a cylindrical drilling blade that is replaceably provided on the elevating body. , has a storage case that communicates with the inner hole of the cylindrical drilling blade through a through hole in the elevating body and is detachably attached to the elevating body, and a flange that can be locked to the upper end of the elevating body. A pair of pressing rods that can slide vertically relative to the body, a coil spring that biases each pressing rod downward, and a guide hole provided at the lower end of each pressing rod through which a cylindrical drilling blade can pass. It also has a pressing piece that can individually press the top surface of the document around the perforation position, and when the elevating body is lowered by the rotation of the drive source to punch holes, the pressing rod corrects the imbalance that occurs on the top surface of the document. What is claimed is: 1. A punching device characterized in that the document is absorbed by sliding upward, and the document is pressed through a pressing piece by the biasing force of a coil spring.