JPH1135162A - Paper high stacking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper high stacking device provided with a simple and lightweight structure by which a table can be stably lifted/lowered without causing any inclination or play. SOLUTION: In this high stacking device, a rectangular support 4 is stood in a base 1 while displaced by 45 deg. so that its pair of column ridges are opposedly arranged in the longitudinal direction precisely, and a pair of guiding column ridges are formed opposedly. From the rear end of the central part in an elevating lever 7, a pair of brackets 9, 9 are orthogonally projected upward diagonally, while bearing rollers 10a, 10b, which are journalled between the base parts and the tip parts of the brackets 9, 9, are assembled so that the lower bearing roller 10a is rotationally slid on the front side column ridge while the upper bearing roller 10b is rotationally slid on the rear side column ridge. A pair of pallet supporting arms 18, 18, which are protruded from the elevating lever 7 and held horizontally, are driven by means of a control motor 15 so as to be lifted/lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper stacking machine used for reloading sheets stacked high for the purpose of paper alignment and paper handling before printing.

[0002]

2. Description of the Related Art In a current printing process using an automatic printing machine, since it is necessary to reliably supply sheets one by one, preparatory operations such as aligning and separating sheets of highly stacked sheets are important steps. However, since the paper cutting is heavy, heavy work is required to increase the burden on the worker.

[0003] Therefore, in order to stabilize the working posture and reduce the burden on the operator, there has been a demand for the use of a paper stacking machine that keeps the level of the stacked papers constant, and various conventional paper stacking machines have been used. Is used.

In order to reduce the number of parts and simplify the structure, a simplified type paper stacking machine generally inserts a bearing mounted on a table into a groove type guide rail, and moves up and down along the guide rail. Or a bearing is axially provided facing the table, and a guide rail is inserted between the bearings to move up and down along the guide rail.

[0005]

That is, in this type of paper stacking machine, it is necessary that the table to be raised and lowered does not rattle. However, in the above-mentioned conventional structure, a slight gap is required between the bearing and the rail. Become. For this reason, there is no guarantee that the bearing always slides in close contact with the rail, and even if the linear accuracy of the guide rail is increased, there has been a problem that the table is inclined when ascending and descending.

When the number of parts is reduced, the rigidity is reduced accordingly. In addition, since it is necessary to maintain the lifting rod that supports the pallet support arm horizontally, this type of paper stacking machine generally has a two-pillar structure with upright columns on the left and right. Things could not be designed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a structure in which a vertically moving table does not tilt or rattle and can be driven up and down stably.
Provided is a paper stacking machine that has a simple structure with only one support, and also serves as a guide rail for an elevating rod, and the guide rail has a centering function so that the table surface can be accurately displaced vertically. It is intended to do so.

[0008]

SUMMARY OF THE INVENTION A paper stacking machine according to the present invention has a guide rail standing upright on a machine base and a pallet support arm for mounting a paper pallet along the guide rail. In a paper stacking machine in which a rod is pivotally movable up and down and the lifting rod is driven up and down by an appropriate lifting means, the square rail having the guide rails standing upright from a base is provided by 45.
The pair of pillar ridges are formed opposite to each other by guide pillar ridges of the square pillars suspended from the base so that the pair of pillar ridges are accurately opposed to each other in the front-rear direction. Two bearing rollers are provided between a pair of brackets extending so as to interpose the rectangular strut in an obliquely improved manner so as to be orthogonal to the central rear end, and are separately disposed at a base end position and a front end position of the bracket, The lower bearing roller rotates and slides on the guide rail surface formed by the front pillar of the square support, and the upper bearing roller rotates and slides on the guide rail surface formed by the rear pillar of the square support. And a structure in which a pair of pallet support arms protruding from the elevating rod are horizontally supported and moved up and down.

[0009] That is, in the above configuration, the rectangular column vertically mounted on the base is turned by 45 degrees to be established.
Since the supporting strength of the square pillar as a pillar material is increased and sufficient strength can be obtained with one pillar, the size and weight of the device can be reduced. Further, since the pillar ridge of the square pillar also serves as a guide rail for supporting the lifting rod, there is no need for a separate member such as a guide rail, so that the number of parts can be reduced and the weight can be further reduced. is there.

The two bearing rollers have a centering circumferential groove having a substantially 90-degree V-shaped cross section at the center of the roller, and the centering circumferential groove is formed with a guide pillar of a square support. The lifting rod is always kept horizontal by a mechanical combination with a pair of brackets which are fitted and rotated and slid. can do.

That is, in the above configuration, when a load is applied to the elevating rod, the centering peripheral grooves of the both bearing rollers are pressed against the guide pillar ridges located in front of and behind the square pillar, and fitted in the valley direction. The guide rod is guided to the center position, and acts so as to be always centered to horizontally support the elevating rod.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a paper stacking machine according to the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a base having leg frames 3 and 3 projecting in parallel from both ends of the horizontal frame 2 toward the front to form a U-shaped planar shape. The structure is such that the column 4 is supported in a substantially vertical direction. Each of the leg frames 3, 3 is provided with an installation level adjusting mechanism 5, 5,.

The prism 4 is a prism having a square cross section. The prism 4 is rotated and displaced by 45 degrees with respect to the horizontal frame 2 so that the pair of opposing pillars accurately move in the front-rear direction (arrow A) of the base 1. Guide pillars 6, 6 are formed by a pair of pillars located in the front-rear direction of the square pillar 4 while being vertically erected from the horizontal frame 2 so as to face.

Further, a pair of brackets 9, 9 extending obliquely upward from the rear end of the central portion of the elevating rod 7, which is a bar having a vertically long rectangular cross section, are located on both sides of the square column 4.
And the bearing rollers 10a, 10 between the base and the end of the brackets 9, 9, respectively.
b is rotatably mounted on a shaft.

The above two bearing rollers 10a and 10b
The centering peripheral groove 11 having a valley angle of about 90 degrees is provided around the center of the outer ring, and the peripheral groove 11 of the lower bearing roller 10 a
Also, the peripheral groove 11 of the upper bearing roller 10b is assembled so as to slide with the rear guide pillar 6 on the rear side of the square pillar 4 to constitute an automatic centering mechanism. At this time, the raising and lowering rod 7 is set so that the cross-section of the rod is exactly parallel to the axial direction of the square column 4.
The distance between 0a and 10b is designed and adjusted.

The lifting and lowering rod 7 is suspended between a side wall of a gear box 8 fixed to the top end of the square column 4 and a suspended drive shaft 12.
At the ends of the chain belts 14 and 14 which are wound and engaged with a pair of chain wheels 13 and 13 which are pivotally mounted on, respectively, the rod central portions of the brackets 9 and 9 are connected and suspended.
A control motor 15 fixed to the gear box 8 and the suspension drive shaft 12 are rotatably connected via a worm gear 16 and supported.

The free ends of the chain belts 14, 14 are respectively inserted into and suspended from square pipes 17, 17 provided between the horizontal frame 2 of the base 1 and the gear box 8 so as to be parallel to the rectangular columns 4. .

Reference numerals 18 and 18 denote pallet support arms which support the rear end of the lift rod 7 in a cantilever manner. The rear ends of the pallet support arms 18 have a rectangular shape of the lift rod 8. A hook-shaped hooking end 19 having a structure to be locked on the cross section is configured to be slidable in the width direction of the lifting / lowering rod 7. The pallet support arm 18 can be fixed to a predetermined position of the elevating rod 7 by tightening the fastening bolt 20, and the cantilevered position can be changed according to the size of the pallet.

The pallet support arms 18, 18 are configured to fall within the leg frames 3, 3 even at the position where the pallet support arms 18, 18 are moved to the full width of the lift rod 7, so that the lift rod 7
Is moved down to the floor level of the apparatus installation surface, and the paper pallet a placed on the pallet support arms 18 can be directly placed on the floor.

Reference numerals 21 and 21 denote paper abutment guides fixed to the base 1 via support rods 22. The paper abutment guides are located in front of the lifting and lowering rods 8 so as to be parallel to the rectangular columns 1. It will be erected.

A paper level detector 23 such as a light emitting diode is provided on the machine base 1 behind the paper butting guide 21, and is provided through a control circuit built in a control box (not shown). The control motor 15 is automatically driven to rotate right or left, and operates so as to maintain the upper level position L1 of the stacked paper b in a predetermined position range.

Reference numerals 24, 24 denote moving tires respectively mounted on both ends of the horizontal frame 3 of the machine base 1, which come into contact with the floor by slightly lowering the machine base 1.

The paper stacking machine having the above-described structure is constructed so that both pallet support arms 1 are adapted to the size of the paper pallet a to be used.
The elevating rod 7 is lowered with the widths of 8, 18 adjusted and tightened and fixed by the fastening bolts 20, respectively. After that,
The paper pallet a on which the paper b is piled up by using a forklift is placed on both pallet support arms 18, and the control motor 15 is turned “ON” to raise the elevating rod 7 to raise the upper level position L1 of the paper b. Reaches a predetermined height set in advance by the paper level detector 23, and the control motor 1
Stop 5.

When the upper bundle of paper is removed from this position,
The control motor 15 is rotated until the upper level of the new sheet b matches a predetermined height set in advance, and the control operation is performed so as to drive the lifting rod 7 upward. When the sheet bundle is stacked on the sheet b stacked high from this position, the control motor 15 is rotated in reverse until the upper level position L1 of the new sheet b coincides with a predetermined height, and the elevating rod 7 is moved. Drive down.

The raising and lowering of the lifting and lowering rod 7 is performed by the rotational drive of the control motor 15. That is, when the control motor 15 rotates, the suspension drive shaft 11 rotates via the worm gear 16, and the meshing position with the chain belt 14 with the rotation of the chain wheel 13 axially mounted on the suspension drive shaft 11. Is displaced.

Accordingly, the elevating rod 7 integrated with the brackets 9, 9 connected to the lower ends of the two chain belts 14, 14 is raised and lowered, and is attached to the brackets 9, 9. Bearing rollers 10a, 10
b is in sliding contact with the guide pillars 6, 6 of the square pillar 4 from the front and the rear, always in a state of being in close contact with each other. Vertically moving up and down accurately, the paper abutment guide 2
By stacking the sheets b in contact with the sheets 1 and 21, the sheets can be stacked vertically vertically.

[0027]

As described above, according to the structure of the paper stacking machine of the present invention, two bearing rollers are attached to the brackets protruding from the elevating rod, and are positioned at the diagonal positions of the square columns. The structure is sandwiched in a lever-like manner from the front and back of the guide pillar ridge, so that both bearing rollers are always in sliding contact with each other in close contact. Therefore, the two pallet support arms attached to the elevating rod can be vertically lifted and lowered accurately along the guide pillars without rattling, and the paper can be stacked vertically.

That is, not only the table can be stably raised and lowered without tilting or rattling by the simple structure as described above, but also the rectangular column vertically mounted on the base is rotated by 45 degrees. With the structure established
Since the supporting strength of the square pillar as a pillar material is increased and sufficient strength can be obtained with one pillar, the size and weight of the device can be reduced.

Further, since the pillar ridge of the above-mentioned square pillar is a guide pillar ridge which also serves as a guide structure for supporting the elevating rod, a separate member such as a guide rail is not required, the number of parts is reduced, and the weight is further reduced. The present invention has such features that it is possible to provide a high-performance paper stacking machine at a low cost, and the effect of the present invention is extremely large.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of a paper stacking machine according to the present invention.

FIG. 2 is a plan view of the main part.

FIG. 3 is a cross-sectional view of a main part viewed from the side showing a structure of a mounting portion of a lifting rod to a square support.

FIG. 4 is an enlarged plan sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Side frame 3 Leg frame 4 Square support 5 Installation level adjustment mechanism 6 Guide pillar 7 Lifting rod 9 Bracket 10a, 10b Bearing roller 11 Centering peripheral groove 12 Suspension drive shaft 13 Chain wheel 14 Chain belt 15 Control motor Reference Signs List 16 worm gear 17 square pipe 18 pallet support arm 19 hook-shaped end 20 fastening bolt 21 paper butting guide 23 paper level detector a paper pallet b paper L1 upper level position of paper

Claims (2)

[Claims] 1. A guide rail is erected on a machine base, and an elevating rod carrying a pallet support arm for mounting a paper pallet along the guide rail is pivotally provided so as to be able to move up and down. In the paper stacking machine driven up and down by a lifting means as appropriate, the guide rail is displaced from the base so that a pair of pillars are accurately opposed in the front-rear direction by rotating and displacing the square support standing upright from the base by 45 degrees. The erecting rod is formed opposite to the guide pillar ridge of the vertically extending square pillar, and extends so as to interpose the square pillar in an obliquely improving manner so as to be orthogonal to the rear end of the central part of the elevating rod. Two bearing rollers are provided between a pair of brackets, spaced apart at a base end position and a distal end position of the bracket, and a guide rail surface in which a lower bearing roller is formed by a front pillar of the square support, and Upper bare The grawler is assembled so as to rotate and slide with the guide rail surface formed by the pillar on the rear side of the square pillar, and has a structure in which a pair of pallet bearing arms protruding from the lifting rod are horizontally supported and lifted. Characterized paper stacking machine. 2. The two bearing rollers constitute a centering peripheral groove having a V-shaped cross section of approximately 90 degrees at the center of the roller. The lifting rod is always kept horizontal by a mechanical combination with a pair of brackets projecting obliquely upward from the center rear end of the lifting rod so as to fit and rotate and slide. The paper stacking machine according to claim 1, wherein: