JPH071277Y2 - Office punch - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an office punching machine, and more particularly to an office punching machine for punching a binding hole for binding a plurality of paper sheets stacked in a predetermined thickness.

[0002]

2. Description of the Related Art Conventionally, a punching machine of this type has a base member having a guide portion which supports a lift table having a drilling cone so that the lift table can be raised and lowered, and a dust case is integrally mounted on the front surface of the lift table. A dust shooter is provided at the upper part of the lift table for sending the drilling waste discharged from the upper part of the lift table to the dust case, and the hole is discharged from the upper part of the drill cone when the drill cone is lifted and lowered. The waste is sequentially guided through the dust shooter to the dust case and is stored therein.

[0003]

However, in the above-mentioned conventional punching machine, since the dust case is attached to the elevating table, when the elevating table and the elevating table are lowered, the drilling cone is lowered. The dust case also descends together with the lifting table. Therefore, if the bottom surface of the dust case is formed to be lower downward, the dust case interferes with the sheet group to be perforated when the lifting table descends. As a result, the bottom surface of the dust case must be positioned above the effective length of the perforating cone so that the dust case does not interfere with the paper sheet group to be perforated, and the dust case must be attached to the lifting table. Therefore, there is a problem that the depth of the dust case is greatly restricted, and a large amount of perforated chips cannot be accommodated in the dust case.

As a means for solving this problem, it is conceivable to increase the height of the upper end of the dust case to increase the depth of the dust case and increase the storage capacity. With this configuration, when the lifting platform stops at the elevated position at the end of drilling work, the dust case protrudes upward and becomes bulky, and as the dust case becomes larger, the drilling cone and the height of the lifting platform and guides are increased. There is a problem that it is difficult to adopt because the body height and the like also need to be increased and the whole body becomes bulky.

The object of the present invention is to devise a means for guiding the perforated scraps discharged from the upper part of the lifting table to the dust case from the lifting table so that the dust case can be drilled even when the dust case is statically attached to the base member. Since the dust can be guided from the dust shooter to the dust case, the depth of the dust case can be increased without increasing the size and size of the whole, and the amount of perforated waste can be increased. The purpose of the present invention is to provide a punching machine.

[0006]

In order to achieve the above object, the present invention supports a lift base 4 having a drilled cone 6 on a base member 1 having a guide portion 3 so that the lift base 4 can be lifted and lowered. In an office punching machine configured to discharge punching scraps from the upper portion, a dust case 21 having an open upper surface is arranged outside the lifting table 4 and is mounted stationary on the base member 1, and the lifting table is also provided. 4 is provided with an opening portion facing the dust case 21, and a receiving body 23 for accommodating the perforated scraps is provided.
The dust shooter 24, which guides the drilling scraps stored in 1. to the dust case 21, stands up to a guide position for guiding the drilling scraps and the guide position, and the drilling scraps flow out from the opening of the receiving body 23. The dust shooter 24 is urged toward the guide position while being swingably supported in a closed position that prevents the dust shooter 24 from moving, and the tip end position of the dust shooter 24 is lowered when the elevating table 4 is lowered. The dust shooter 24 is set so as to interfere with the inside of the dust case 21 and swing to the closed position, and to release the interference at the raised position to swing to the guide position.

In the present invention, the inner side of the dust case 21 includes not only the inner side wall of the dust case 21 but also a stationary member disposed inside the inner side wall.

Further, the base member 1 is provided with a dust case supporting bracket 22 for covering the outer positions of the elevating table 4 and the drilling cone 6 at the elevating position of the elevating table 4, and the bracket 22
It is preferable to attach the dust case 21 to the.

[0009]

When the elevating table 4 is moved up and down to perform a punching operation, the dust case 21 is not moved up and down, and only the elevating table 4 is moved up and down. When the elevating table 4 is lowered, the dust shooter 24 is moved. Is the dust case 21
By interfering with the inside, it swings from the guide position to the closed position that closes the open part of the receiving body 23, whereby the drilling waste discharged from the upper part of the lifting table 4 is stored in the receiving body 23.

When the punching operation is completed and the dust shooter 24 is in the raised position, the dust shooter 24 is released from the interference with the inside of the dust case 21 and swings to the guide position. The perforated waste stored in the receiving body 23 via 24 is guided to and stored in the dust case 21.

As described above, when the elevating table 4 is moved up and down, only the elevating table 4 can be moved up and down without elevating the dust case 21. As a result, the depth of the dust case 21 can be increased or decreased. Even if the dust case 21 is deeply formed so as to have a depth from the upper end position of the elevating table 4 in the ascending position to the position of the lower end of the perforation cone in the ascending position, the dust case 21 interferes with the sheet group to be perforated. As a result, the dust case can be made large in depth without increasing the size and size of the entire body, and the amount of perforated waste can be increased.

Further, since the dust case supporting bracket 22 provided on the base member 1 is provided so as to cover the outer positions of the lifting table 4 and the drill cone 6 at the raised position of the lift table 4, the bracket 22 is provided with the bracket 22. It can also be used as a safety cover for the above, and the dust case 21 can be stably attached, and when the dust case 21 is removed, the perforation cone 6 is not exposed, so that the safety can be improved accordingly.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show an electric punching machine for office use to which the present invention is applied. In FIGS. 1 and 2, reference numeral 1 is a box-shaped base member, and the left and right side walls are provided on the upper portion of the base member 1. A support frame 2 supported above the base member 1 by 2a, 2a and a rear wall 2b is provided, and a pair of guide bodies 3, 3 is provided between the front end portion of the support frame 2 and the base member 1.
Are separated and fixed in the left-right direction for a predetermined period.

Reference numeral 4 denotes an elevating table, and a pair of through holes 41, 41 penetrating vertically are formed on the front side of the elevating table 4, and the conical holders 5, 5 are provided in these through holes 41, 41. 5 are pierced respectively and are rotatably supported through a pair of bearings, and at the bottom of each of these holders 5, 5 are drilled cones 6, 6.
Is attached detachably, while sliding portions 43, 43 having insertion holes 42, 42 for the guide bodies 3, 3 are formed on the rear side, and the ascending / descending movement is performed via these sliding portions 43, 43. The table 4 is supported by the guide bodies 3 and 3 so as to be vertically movable.

Reference numerals 7 and 8 denote two upper and lower motors arranged in parallel at the rear of the elevating position of the elevating table 4 on the base member 1.
Of these motors, the lower motor 7 is a forward / reverse lifting motor fixed to the upper surface of the base member 1, and the upper motor 8 is a cone driving motor fixed to the lower surface of the support frame 2. A motor, which is an elevation drive power transmission mechanism 9 between the elevation motor 7 and the elevation table 4.
On the other hand, a drive shaft 11 that interlocks with the conical drive motor 8 and penetrates the lift table 4 is provided at the front end of the support frame 2 so that the power of the drive shaft 11 is supplied to the lift table 4. A power transmission mechanism 10 for driving a drilling cone is provided which is received and transmitted to the drilling cones 6, 6.

As shown in FIGS. 1 and 4, the lifting drive power transmission mechanism 9 rotatably supports the lifting screw shaft 12 at an intermediate portion between the guide members 3 of the base member 1. The insertion holes 42, 42 of the lifting table 4
In between, a through hole 44 is provided at a position corresponding to the screw shaft 12, and a nut body 45 screwed into the screw shaft 12 is fixed in the through hole 44, and the nut body 45 and the screw shaft 12 are fixed. And the lower end portion of the screw shaft 12 and the lower end portion of the screw shaft 12 which are provided on the motor shaft 71 by penetrating the lower end portion of the screw shaft 12 and the motor shaft 71 of the lifting motor 7 into the base member 1. And a driven wheel 13 provided on the drive shaft 7 are interlockingly connected to each other via a first belt 14, and the screw 7 is driven by a forward / reverse drive of the lifting / lowering motor 7 via a belt transmission mechanism including the drive wheel 72, the driven wheel 13 and the belt 14. The shaft 12 is configured to rotate in the forward and reverse directions to move the elevating table 4 up and down.

The ascending / descending motor 8 performs forward / reverse switching at the descending position and stops at the ascending position. As its control means, the ascending position of the ascending / descending table 4 is detected on one side wall 2a. A first limit switch LS1 and a second limit switch LS2 for detecting a lowered position are provided, and a contact body 43a is provided on one sliding portion 43 of the elevating table 4, and the second limit by the contact body 43a is provided. When the switch LS2 is turned on, the elevating motor 7 is switched from normal rotation to reverse rotation to change the elevating table 4 from the descending operation to the ascending operation, and the first limit switch LS1.
It is configured such that the lifting motor 7 and the cone driving motor 8 are stopped by the ON operation of. Further, as shown in FIGS. 1 and 3, in the power transmission mechanism 10 for driving the drilling cone, the motor shaft 81 of the cone driving motor 8 is penetrated above the support frame 2 and the drive wheel 82 is provided at the tip thereof.
And a drive shaft 11 formed of a hexagonal spline shaft is rotatably supported through the front side of the support frame 2, and a driven wheel 15 is provided at an upper end of the drive shaft 11.
The driven wheel 15 and the drive wheel 82 are interlockingly connected to each other via the second belt 16, and a through hole 46 is formed between the cone holders 5 and 5 and the guide bodies 3 and 3 in the lift 4. Then, the lower side of the drive shaft 11 is penetrated through the through hole 46, and a supporting piece 17 is provided at an upper position of the through hole 46 in the elevating table 4, and the supporting piece 17 is connected to the drive shaft 11 and the spline engagement. And integrally rotate and drive shaft 1
The rotating wheel 18 which is movable in the axial direction of 1 is supported rotatably.

Then, the rolling wheels 19 and 19 are fixed to the upper ends of the conical holders 6 and 6, and the rolling wheels 19 and 19 and the rotary wheel 18 are interlockingly connected via a third belt 20,
By driving the conical rotation motor 8, the drive shaft 11 is driven via a belt transmission mechanism including a drive wheel 82, a driven wheel 15, and a second belt 16, and the rotation of the drive shaft 11 causes
Rolling wheels 19 through the rotating wheel 18 and the third belt 20,
19 is rotated to rotate the perforation cones 6 and 6 together with the conical holders 5 and 5, and the perforation that occurs when a group of paper sheets is perforated by the perforation cones 6 and 6 by lowering the elevating table 4. As shown in FIG. 6, the scraps are discharged to the upper part of the lifting table 4 through the hollows of the drill cone 6 and the cone holder 5.

Therefore, at the outer position of the lift table 4,
A dust case 21 having an open upper surface is disposed and statically provided on the base member 1, and perforated scraps discharged to the upper part of the lifting table 4 are stored in the lifting table 4 when the lifting table 4 descends. A guide means for guiding the dust case at the raised position is provided as follows.

That is, as shown in FIGS. 1 and 2, at the front ends of the side walls 2a, 2a fixed to the base member 1, a U-shaped plan view enclosing the front surface and both side surfaces of the lift 4 in the raised position. While providing the dust case support bracket 22,
The bracket 22 has a U-shaped plan view along the front surface and both side surfaces of the bracket 22 and has a dust case 21 with an upper opening.
On the other hand, a receiving body 23 for accommodating the drilling waste is provided at the upper part of the elevating table 4, and a receiving body 23 for accommodating the perforated waste is provided at the opening of the receiving body 23.
The dust shooter 24, which guides the drilling waste contained in the receiving body 23 to the dust case 21, is erected at a guide position for guiding the drilling waste and at the guide position.
The swing shooter 24 is swingably supported via a hinge 25 at a closed position where the drilling waste is prevented from flowing out from the open portion of 3, while the dust shooter 24 is constantly urged toward the guide position via a spring 25a. In addition, as shown in FIG. 6, the tip position of the dust shooter 24 is set to the dust case 21 when the lift table 4 is lowered.
Interfering with the inner bracket 22 and swinging to the closed position, at the raised position, the interference is released to swing to the guide position as shown in FIG. It is configured so as to be guided to the dust case 21 via 24.

The bracket 22 and the dust case 21
The heights of the respective upper end portions are substantially the same as the height of the upper surface of the lifting platform 4 located in the raised position, and the lower end portions are located at the tip position of the drill cone 6 located in the raised position. At a position slightly lower than the position, the drilling cone 6 is prevented from projecting downward from the lower end of the dust case 21 at the raised position, while the bracket 22 and the dust case 21 are as described above in the front surface and both side surfaces of the lifting table 4. It is formed in a U shape in plan view so as to surround and. Therefore, with the above configuration, the depth of the dust case 21 can be increased, and the lateral length can be made sufficiently long to increase the storage capacity. The case 21 covers the outer peripheral portion of the drilling cone 6 that stops at the raised position to enhance safety.

Dust case 21 to the bracket 22
As shown in FIG. 2, the mounting means is formed with engaging grooves 22a, 22a on the bracket 22 side, and
Engaging projections 21a, 21a that engage with the engaging grooves 22a, 22a are formed inside the dust case 21, and the engaging projections 21a, 21a are engaged with or disengaged from the engaging grooves 22a, 22a. It is detachably attached.

In the above embodiments, the dust case support bracket 22 is made to interfere with the dust shooter 24, but the dust shooter 24 is made to directly interfere with the inner side wall of the dust case 21 without using the bracket 22. It may be configured as follows.

Further, in FIG. 1, reference numeral 26 denotes a paper pressing body which has a pressing piece 27 provided on the lower front part of the elevating table 4 so as to be vertically movable, and presses a paper sheet group to be punched at the lowered position.
A compression spring 28 that urges the pressing piece 27 downward is interposed between the lower surface 7 and the lower surface of the lifting table 4.
Is covered with the drilling cone 6 by the bracket 22 when the lifting table 4 is in the raised position.

Further, in FIGS. 1 and 2, 29 is a control board provided inside the base member 1, 30 is a power switch provided on the other side wall 2a, 31 is the support frame, dust case support bracket. 22 is an upper cover that covers the upper portions of the dust case 21 and the dust case 21 and is detachably attached to the support frame 2. In the front portion of the upper cover 31, the elevating motor 7 and the cone driving motor 8 are simultaneously driven to perform a punching operation. An operation switch 32 for starting the operation and a reset switch 33 for interrupting the drilling work and returning the lifting table 4 to the raised position are provided.

Further, at the front end of the other side wall 2a,
As shown in FIG. 3, a limit switch LS3 for detecting the presence / absence of attachment of the dust case 21 is provided. Unless the dust case 21 is attached and the limit switch LS3 is turned on, the motors 7 and 8 are not operated. It is designed so that it cannot be driven. As a result, the dust case 21
Even if the operation switch 32 is erroneously pressed when the dust case 21 is removed to discard the drilling waste inside or when the drilling cone 6 is replaced, both the motors 7, 8
The safety is improved by not driving.

Further, in FIGS. 1 and 2, 34 is a restricting piece for restricting the end portion of the paper sheet group on the perforation side with respect to the perforating cones 6 and 6, and the restricting piece 34 with respect to the base member 1. It is movably supported in the front-rear direction, and the fixing knobs 35, 35 provided on the side walls 2a, 2a of the support frame 2 are provided so that the intervals between the drilling cones 6, 6 with respect to the drilling position can be freely adjusted.

Further, reference numeral 36 in FIG. 2 denotes a paper holding table detachably provided at the front part of the base member 1,
A pair of holding pieces 3 that move toward and away from each other so as to hold both sides of the paper sheet group at positions spaced apart from each other by the right and left punching positions.
It has 7,37.

The present invention is constructed as described above, and in use, the power switch 30 is first turned on, and then a large number of stacked paper sheets are placed on the base member 1 and then the operation switch 32 is turned on. It suffices that the lifting wheel 7 and the conical drive motor 8 are driven at the same time, and the lifting wheel 7 is driven in the normal direction to drive the drive wheels 7.
The screw shaft 12 is normally rotated through the belt transmission mechanism including the driven wheel 13, the driven wheel 13, and the belt 14 to lower the elevating table 4, while the drive wheel 82 and the intermediate wheel 15 are driven by the conical rotation motor 8. The drive shaft 11 is driven via a belt transmission mechanism including a second belt 16 and a pair of belt drive mechanisms including a rotating wheel 18 and a third belt 20 due to the rotation of the drive shaft 11. The rollers 19 and 19 rotate to rotate the drill cones 6 and 6 together with the cone holders 5 and 5.

As the lifting table 4 descends, the paper pressing body 26 contacts the surface of the paper sheet group, and the perforation cones 6 are rotated while the paper pressing body 26 prevents the paper sheet group from being displaced. The paper sheet group is perforated all at once by lowering it while making it.

At the end of this perforation, that is, when the lifting table 4 is in the lowered position, the second limit switch LS2 is turned on, the lifting motor 7 is switched to the reverse rotation drive, and the lifting table 4 is raised. Then, the first limit switch LS1 is turned on when the lifting table 4 is located at the raised position, and the lifting motor 7 and the cone driving motor 8 are stopped to finish the punching operation.

When performing the above-described punching work, however, since the dust case 21 is mounted stationary on the base member 1 side, the dust case 21 does not move up and down when the elevating table 4 moves up and down. Only the table 4 moves up and down, and when the lifting table 4 descends, the dust shooter 24 interferes with the bracket 22 inside the dust case 21 as shown in FIG.
The tip of the rocking member swings against the spring 25a from the guiding position to the closing position for closing the opening of the receiving body 23, whereby the drilling waste discharged from the upper part of the lifting table 4 is stored in the receiving body 23. It is.

Then, when the drilling work is completed under the condition that the drilling waste is stored in the receiving body 23 and the lifting table 4 is located in the raised position, as shown in FIG. The interference with the bracket 22 is released, and the dust shooter 24 swings to the guide position by the spring 25a, thereby guiding the perforated waste stored in the receiving body 23 to the dust case 21 via the dust shooter 24. Can be accommodated.

As described above, when the elevating table 4 is moved up and down, the dust case 21 is not moved up and down, and only the elevating table 4 can be moved up and down. The dust case 21 can be reliably accommodated in the dust case 21 through the means, and as a result, the dust case 21 can be accommodated.
1 is formed so as to have a depth from the upper end position of the lifting platform 4 at the raised position of the lifting platform 4 to the position of the lower end portion of the drill cone at the raised position as shown in FIG. 6 does not interfere with the perforated paper sheet group,
The depth of the dust case 21 can be increased,
It is possible to increase the storage amount of the drilling waste.

In the above embodiments, the two motors of the lifting motor 7 and the conical drive motor 8 are used. However, for example, one motor having a vertically protruding motor shaft is used. However, the motor may be used as both a lifting motor and a conical driving motor, and the invention is not limited to the electric punching machine and can be applied to a manual punching machine.

[0036]

As described above, according to the present invention, the dust case 21 having an open upper surface is arranged outside the elevating table 4 having the drilling cone 6 supported by the base member 1 so as to be vertically movable. In addition, the receiver 23 is mounted stationary and has an opening portion facing the dust case 21 at the upper part of the elevating table 4, and a receiving body 23 for accommodating the drilling waste is provided. The dust shooter 24 that guides the drilling scraps stored in the body 23 to the dust case 21 stands up at a guide position that guides the drilling scraps and at this guide position, and the drilling scraps flow out from the opening of the receiving body 23. The dust shooter 24 is urged toward the guide position while being swingably supported in a closed position that prevents
The tip position of the dust shooter 24 interferes with the inside of the dust case 21 to swing to the closed position when the lifting table 4 descends, and swings to the closed position. Since it is set so as to oscillate in the vertical direction, it is possible to raise and lower only the raising and lowering table 4 without raising and lowering the dust case 21 when the raising and lowering table 4 is raised and lowered. The discharged drilling waste can be stored in the receiving body 23 on the lifting table 4 side when the lifting table 4 is lowered, and can be stored in the dust case 21 at the raised position where the drilling work is completed. The dust case 21 is deeply formed so as to have a depth from an upper end position of the lifting table 4 at the rising position of the lifting table 4 to a position of a lower end portion of the drilling cone at the rising position. Since it is, without increasing the size of the whole becomes bulky, it is possible to increase the depth of the dust case, it is possible to reduce the increase in the capacity of chad.

Further, since the dust case support bracket 22 provided on the base member 1 is provided so as to cover the outer positions of the lifting table 4 and the drill cone 6 at the raised position of the lift table 4, the bracket 22 is provided with the bracket 22. It can also be used as a safety cover for the above, and the dust case 21 can be stably attached, and when the dust case 21 is removed, the perforation cone 6 is not exposed, so that the safety can be improved accordingly.

[Brief description of drawings]

FIG. 1 is a partially developed longitudinal section showing an embodiment of an office punching machine of the present invention.

FIG. 2 is a perspective view showing a state in which an upper cover and a dust case are removed and a paper holder is attached.

FIG. 3 is a plan view showing a state in which an upper cover and a dust case are removed.

FIG. 4 is a bottom view of the base member with the bottom open.

FIG. 5 is an explanatory diagram showing an operating state of the dust shooter when the lifting platform is located at the raised position.

FIG. 6 is an explanatory diagram showing an operating state of the dust shooter when the lifting platform is located at the lowered position.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base member 3 Guide part 4 Lifting table 6 Drilling cone 21 Dust case 22 Dust case support bracket 23 Receiving body 24 Dust shooter

Claims (2)

[Scope of utility model registration request] 1. A base member 1 having a guide portion 3 supports a lift table 4 having a perforated cone 6 so as to be lifted and lowered.
In an office punching machine that discharges punching scraps from the upper part of the base, a dust case 21 having an open upper surface is arranged outside the elevating table 4, and the dust case 21 is statically attached to the base member 1 and is moved up and down. A receiver 23 having an opening facing the dust case 21 is provided at the upper part of the table 4, and the receiving body 23 for accommodating the drilling waste is provided.
The dust shooter 24 that guides the drilling scraps stored in 3 to the dust case 21 is erected at a guide position that guides the drilling scraps and at this guide position, and the drilling scraps flow out from the opening of the receiving body 23. The dust shooter 24 is oscillatably supported in a closed position to prevent the dust shooter 24 from being pushed, and the dust shooter 24 is biased toward the guide position.
When the elevating table 4 is lowered, the dust shooter 24 interferes with the inside of the dust case 21 and swings to the closed position, and the raised position releases the interference and swings to the guide position. Office punching machine characterized by being set as follows. 2. The base member 1 is provided with a dust case support bracket 22 for covering the outer positions of the lifting table 4 and the drilling cone 6 at the raised position of the lifting table 4, and the dust case 21 is attached to the bracket 22. The office punching machine according to claim 1.