JP2010052105A - Semiautomatic plate punching machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a semiautomatic plate punching machine capable of achieving facilitation of manual inserting work and improvement of registering accuracy. <P>SOLUTION: A fed sheet 7 is energized to the left by an elastic force of a guide plate 42 mounted on a right guide 24, so that the sheet travels on a table 21 in such a state as to be pressed against a left ruler 23 side (moves backward). Thus, even when an unskilled person jiggles his/her hand operation in inserting or when the operation rate of the machine is increased, the accuracy of registering in the lateral direction of the sheet 7 is ensured. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a semi-automatic flat plate punching machine that is used for punching a sheet material and the like, and relates to a technique that facilitates manual feeding work and improves registration accuracy.

  Boxes such as product packaging containers and outer boxes of tissue paper are punched out from a sheet material such as cardboard or cardboard (hereinafter simply referred to as a sheet) with dimensions and shapes according to the contents, Manufactured by assembling in a timely manner (before or at the same time as the containment). Sheet punching is generally performed by a flat plate punching machine including a paper feed mechanism (work lift), a transport mechanism, a punch mechanism, a paper discharge mechanism (paper discharge lift), and the like. Flat plate punching machines include a fully automatic type that is suitable for mass production. However, when small production of other types is required, a semi-automatic type that can easily change the width of the sheet to be punched is widely used. It has been adopted (Patent Document 1).

In a semi-automatic flat plate punching machine, an operator manually feeds sheets stacked on a work lift one by one to the front surface of the apparatus main body. Then, the seat is provided by the operator with a left ruler (a guide plate mounted on the left side of the front part of the apparatus main body) and a plurality (about 3 to 5) of front contacts (about 3 to 5) mounted on the upper and lower movable plates. After being registered (positioned) with an installed locking member), the sheet is transferred to a fixed position of the punching mechanism by a transport mechanism that operates intermittently. The vertical movable plate and the transport mechanism are operated synchronously by a cam mechanism or the like, and after the vertical movable plate is retracted downward, the sheet is transported to the punching mechanism side. After the sheet is punched by the punching mechanism, the sheet is transported to the rear part of the apparatus main body by the transport mechanism, and discharged / stacked on the rear part of the apparatus main body by the paper discharge lift. Note that the sheet is pressed against the vertical movable plate by a sheet presser made of a spring steel plate or the like at the introduction portion of the apparatus main body, and is held / held by the spike pin or the gripping claw of the transport mechanism in that state. In addition, the blank is punched out in a state where it is coupled to the work with a plurality of continuous contacts so as not to be separated from the sheet in the transport mechanism or the discharge lift.
Patent No. 4024746

  In the above-described conventional semi-automatic flat plate punching machine, the following problems occur due to the fact that the sheet registration is performed only by the left ruler and the front allowance. In the manual feeding operation, the operator inserts the workpiece into the introduction portion of the apparatus main body with the left edge pressed against the left ruler, and performs registration by abutting the leading edge of the sheet against the front. However, if the operator is not skilled, the registration accuracy (how the sheet is displaced in the left-right direction and how it is tilted in plan view) decreases due to camera shake when inserting it, and the pattern and blank printed on the sheet Defective products that are out of shape will be created. Even if the operator is skilled, when the operation speed of the apparatus is increased (for example, about 40 to 50 sheets per minute), the registration accuracy gradually decreases due to fatigue of the arm, etc. Inevitably increased. In addition, even when registration is performed accurately when inserting, the operator may touch the sheet when returning his hand, and the sheet sandwiched between the sheet presser and the upper and lower movable plate may be displaced. .

  The present invention has been made in view of such a background, and an object of the present invention is to provide a semi-automatic flat plate punching machine that facilitates manual feeding work and improves register accuracy.

  The semi-automatic flat plate punching machine according to the first invention transports a sheet material manually fed to a fixed position of the apparatus main body to a punching means, and the sheet material subjected to the punching process in the punching means from the apparatus main body. A semi-automatic flat plate punching machine for discharging, a vertically movable member that locks the front end of the sheet material to the fixed position by a plurality of front contacts, a sheet presser that presses the sheet material against the vertically movable member, A guide plate that slides on one side edge of the sheet material and guides the sheet material to the fixed position, and a biasing unit that biases the other side edge of the sheet material toward the guide plate side. And

  A semi-automatic flat plate punching machine according to the second invention conveys a sheet material manually fed to a fixed position of the apparatus main body to a punching means, and the sheet material subjected to punching processing in the punching means from the apparatus main body. A semi-automatic flat plate punching machine for discharging, a vertically movable member that locks the front end of the sheet material to the fixed position by a plurality of front contacts, a sheet presser that presses the sheet material against the vertically movable member, A friction pad fixed to the front end of the sheet presser and elastically contacting the surface of the sheet material, and a guide plate slidingly contacting one side edge of the sheet material and guiding the sheet material to the fixed position. And

  According to the first invention, when the operator inserts the sheet material into the apparatus main body, the sheet material enters the fixed position without being displaced in the left-right direction by being sandwiched between the guide plate and the urging means. Further, according to the second invention, the sheet material that has entered the fixed position is frictionally held by the friction pad of the sheet presser, and easily deviates from the fixed position even when the operator touches it when returning the hand. Disappear.

  Hereinafter, an embodiment of a semi-automatic flat plate punching machine to which the present invention is applied will be described with reference to the drawings. FIG. 1 is a perspective view showing an overall configuration of a semi-automatic flat plate punching machine according to the embodiment, FIG. 2 is a perspective view showing a paper feed unit of the semi-automatic flat plate punching machine according to the embodiment, and FIG. FIG. 4 is a plan view showing a right guide according to the embodiment, and FIG. 5 is a side view showing a sheet presser according to the embodiment. In the description of the embodiment, the right side in FIG. 1 is the front, and the front side in FIG. 1 is the left.

<< Configuration of Embodiment >>
<Overall configuration of semi-automatic flat plate punching machine>
As shown in FIG. 1, a semi-automatic flat plate punching machine 1 according to the embodiment has a frame 2 (apparatus main body) formed by assembling a large number of press-formed steel plates. The frame 2 is internally provided with a transport mechanism 3 and a punching mechanism 4, a paper feed lift 5 is installed at the front thereof, and a paper discharge lift 6 is installed at the rear thereof. A large number of sheets 7 are stacked on the sheet feed lift 5, and when an operator manually feeds the sheets 7 one by one into the sheet feeding unit 20 of the frame 2, the sheet 7 is intermittently punched by the transport mechanism 3. Then, the punched sheet 7 is discharged onto the discharge lift 6 by the transfer mechanism 3.

  The transport mechanism 3 includes a pair of left and right chains 11, 12, a plurality (five in the present embodiment) of spike holders 13 spanning the chains 11, 12, and a plurality of spike holders fixed to each spike holder 13. (In this embodiment, it is composed of four spike pins 14), and intermittently operates in the direction indicated by the arrow in FIG.

  The punching mechanism 4 includes a lower fixed surface plate 15 fixed to the lower portion of the frame 2, an upper fixed surface plate 16 fixed to the upper portion of the frame 2, and a movable surface plate 17 that moves up and down by a toggle mechanism (not shown). I have. A punching die (molded wood) is mounted on the lower surface of the upper fixed surface plate 16, and the sheet 7 is punched by being pressed against the upper fixed surface plate 16 by the upward movement of the movable surface plate 17. .

<Paper Feeder>
As shown in FIG. 2, the paper feeding unit 20 includes a table 21 fixed to the front part of the frame 2, and a front contact holder 22 (vertical movable member) that is disposed behind the table 21 and reciprocates up and down. A left ruler 23 fixed to the left front portion of the table 21, a right guide 24 fixed to the right front portion of the table 21, a sheet press assembly 27 formed by fixing four sheet pressers 26 to the drive rod 25, and a sheet A cam mechanism 28 for driving the presser assembly 27 is provided.

(Advance)
As shown in FIG. 3, a plurality of (four in the present embodiment) forelocks 31 are fastened to the forehead holder 22. The front contact 31 includes a front contact main body 32 that has a substantially L shape when viewed from the side, and a roller 34 that is rotatably held by the front contact main body 32 via a pin 33. The roller 34 is accommodated in a U-shaped recess 32b formed in the upright portion 32a of the front contact main body 32, and the upper portion projects from the upper end of the upright portion 32a. In the case of this embodiment, the left and right ends 34a and 34b of the roller 34 are subjected to R chamfering for eliminating corners.

(Right guide)
As shown in FIG. 4, the right guide 24 includes a guide base 41 of a steel plate welded structure fixed to the frame 2, and a guide having a substantially J-shaped cross section in which a base end 42 a is fastened to a vertical wall 41 a of the guide base 41. The plate 42 and an adjustment bolt 43 that displaces the guide portion 42b of the guide plate 42 in the left-right direction are configured. The guide plate 42 is made of a relatively thin steel plate (spring steel plate or the like), and the guide portion 42b is separated from the guide base 41 toward the rear in order to guide the manually fed sheet 7 to a fixed position. Yes. The guide base 41 is formed with long attachment slots 41b on the left and right so that the position of the right guide 24 can be adjusted left and right with respect to the frame 2.

(Sheet presser)
As shown in FIG. 5, the sheet presser 26 includes a rod clamp 51 that is externally fitted / fixed to the drive rod 25, a base plate 52 that is fastened to the lower surface of the rod clamp 51, and a spring plate that is fastened to the lower surface of the base plate 52. 53, a friction pad 54 attached to the lower surface of the front end of the spring plate 53, and the like. The spring plate 53 is made of a relatively thin spring steel plate, and presses the sheet 7 via the friction pad 54 by being elastically deformed when the sheet presser 26 is operated. The friction pad 54 is made of rubber or the like having a relatively high friction coefficient, and locks the sheet 7 with a predetermined friction force. The spring plate 53 is fastened to the base plate 52 by a pair of wing nuts 55. Therefore, the operator can easily move the spring plate 53 relative to the base plate 52 in the longitudinal direction by loosening the wing nut 55.

<< Operation of Embodiment >>
When the semi-automatic flat plate punching machine 1 is in operation, the operator manually feeds the uppermost sheet 7 of the paper feed lift 5 into the paper feed unit 20. As shown in FIG. 6, the fed sheet 7 is urged to the left by the elastic force of the guide plate 42 provided on the right guide 24, so that the table 21 is pressed against the left ruler 23 side. Go up (move backward). Thereby, even when an unskilled worker causes camera shake at the time of insertion or the operating speed of the apparatus is increased, the accuracy of registration of the seat 7 in the left-right direction is ensured.

  The fed sheet 7 is registered in the front-rear direction by coming into contact with the respective front contacts 31. At that time, as shown in FIG. 7, the sheet 7 is sandwiched from above and below by the sheet presser 26 and the upper surface of the front contact holder 22. Therefore, even when the operator touches when returning his / her hand, the seat 7 is not easily displaced, and the front / rear / right / left registration is stably realized.

  The registered sheet 7 is conveyed to a fixed position of the punching mechanism 4 by the spike pin 14 of the conveying mechanism 3, and the sheet 7 may hang down on the front abutment 31 at this time. However, in this embodiment, since the roller 34 is mounted on the upper portion of the front contact 31, as shown in FIG. 8A, the sheet 7 contacts the roller 34 instead of the front contact main body 32, and the roller 34 rotates. This prevents the lower surface of the sheet 7 from being scratched. Further, in the case of this embodiment, the left and right ends 34a and 34b of the roller 34 are rounded, so that the bottom surface of the sheet 7 is prevented from being indented. On the other hand, when the operation speed of the apparatus becomes very high, the conveyance of the sheet 7 may be started before the vertical movable plate can be retracted downward due to a slight shift of the synchronization adjustment. However, in the present embodiment, since the roller 34 is mounted on the upper portion of the front contact 31, the sheet 7 is released upward by the rotating roller 34 as shown in FIG. Will not be hurt.

  As described above, in the semi-automatic flat plate punching machine 1 of the present embodiment, the sheet 7 can be easily and accurately registered during the manual feeding operation, and the damage of the sheet 7 due to the front contact 31 can be effectively prevented. Became.

  Although description of specific embodiment is finished above, the aspect of this invention is not restricted to the illustration of this embodiment. For example, in the above-described embodiment, the roller that is in contact with the lower surface of the sheet is provided on the upper portion of the forehead. However, as shown in FIG. Further, PTFE (tetrafluoroethylene resin: so-called Teflon (registered trademark) resin) coating or the like may be applied to the upper end 32c. Also in this case, as in the embodiment, it is possible to effectively prevent the lower surface of the conveyed sheet from being scratched or the leading edge of the sheet from being damaged. In the above embodiment, a guide plate having a substantially J-shaped cross section is used as the right guide. However, a combination of a guide plate having an arc-shaped cross section and a coil spring may be employed. Moreover, in the said embodiment, although the rubber friction pad was stuck to the sheet presser, you may employ | adopt the friction pad etc. which use resin etc. which have moderate adhesiveness as a raw material. In addition, the overall configuration of the semi-automatic flat plate punching machine, the specific configuration of the paper feed unit, and the like can be changed as appropriate without departing from the spirit of the present invention.

It is a perspective view which shows the whole structure of the semi-automatic flat plate punching machine which concerns on embodiment. It is a perspective view which shows the paper feed part of the semiautomatic flat plate punching machine which concerns on embodiment. It is a perspective view which shows the front allowance which concerns on embodiment. It is a top view which shows the right guide which concerns on embodiment. It is a side view which shows the sheet presser concerning embodiment. It is a top view which shows the effect | action of embodiment. It is a side view which shows the effect | action of embodiment. It is a side view which shows the effect | action of embodiment. It is a perspective view which shows the prior allowance which concerns on the partial modification of embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Semi-automatic flat plate punching machine 2 Frame 3 Conveying mechanism 4 Punching mechanism 5 Paper feed lift 6 Paper discharge lift 7 Sheet 20 Paper feed part 23 Left ruler 24 Right guide 31 Front contact 32 Front contact body 34 Roller 42 Guide plate 54 Friction pad

Claims (2)

A semi-automatic flat plate punching machine that transports a sheet material manually fed to a fixed position of the apparatus main body to a punching means, and discharges the sheet material subjected to punching processing in the punching means from the apparatus main body,
A vertically movable member that locks the front end of the sheet material at the fixed position by a plurality of priors;
A sheet presser that presses the sheet material against the vertically movable member;
A guide plate that slidably contacts one side edge of the sheet material and guides the sheet material to the fixed position;
A semi-automatic flat plate punching machine comprising biasing means for biasing the other side edge of the sheet material toward the guide plate. A semi-automatic flat plate punching machine that transports a sheet material manually fed to a fixed position of the apparatus main body to a punching means, and discharges the sheet material subjected to punching processing in the punching means from the apparatus main body,
A vertically movable member that locks the front end of the sheet material at the fixed position by a plurality of priors;
A sheet presser that presses the sheet material against the vertically movable member;
A friction pad fixed to the tip of the sheet presser and elastically contacting the surface of the sheet material;
A semi-automatic flat plate punching machine comprising a guide plate that is in sliding contact with one side edge of the sheet material and guides the sheet material to the fixed position.

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