JP2002166343A - Grinder of book - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grinder to grind an end surface of a book saving labour, increasing performance and high in safety. SOLUTION: This grinder to grind the end surface of the book constitutes its characteristic feature of being constituted of a clamp mechanism to fasten one or a plural number of the books from front and back in a state of erecting it or them, a placing base to arrange height of a lower end surface by placing the books existing below the clamp mechanism and before fastening, a moving mechanism to reciprocate the books before fastening in the lateral direction to a point separated from the placing base with the clamp mechanism and a grinding mechanism to grind the lower end surface of the book existing on the side of the placing base and moving by working on it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding apparatus for grinding an end face other than the back of a book, especially a used book, in order to increase its commercial value.

[0002]

2. Description of the Related Art The color of an end face of a book fades over time, and dirt adheres to the book, making it difficult to remove the book. For this reason, in the case of a book with perfect binding of the cover and the body of the same size, such as perfect binding or azimuth binding, the end face of the body is ground together with the cover and remade after a certain period of time, regardless of the used book, even if it is a new book. ing. This grinding is performed using a machine, and a machine for that purpose has been put to practical use. The present applicant has also proposed such a book grinding apparatus in Japanese Patent Application No. 2000-384.
However, in this case, the book clamping and grinding operations are all manual, and the number of books that can be ground is limited to one book.

[0003]

This is intended to secure the safety by relying on the operation under the consciousness of the worker.
On the other hand, it could not be denied that speed and labor saving were hindered. For this reason, when grinding a large number of books at once, this is insufficient. The present invention addresses such a problem, and a plurality of books to be ground are possible, and moreover, each operation is automated as much as possible to save labor and increase efficiency. . Further, even if it is automated, safety can be sufficiently ensured.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention is a grinding apparatus for grinding an end face of a book, and the grinding apparatus comprises a clamp mechanism for tightening one or a plurality of books in an upright state from the front and back. And a table below the clamp mechanism for placing a book before tightening and aligning the height of the lower end surface of the book, and a movement for reciprocating the book after tightening together with the clamp mechanism in a lateral direction to a place away from the table. The present invention provides a book grinding apparatus comprising: a mechanism; and a grinding mechanism that acts on the lower end surface of the book that moves beside the mounting table to grind the book.

That is, according to the present invention, the clamp mechanism tightens the book, and the moving mechanism reciprocates the tightened book together with the clamp mechanism to act on the grinding belt. do not do. Therefore, labor is saved and work is quick. Further, not only one book but also a plurality of books can be ground, so that the efficiency is improved.

Specifically, the clamping mechanism may be a hydraulic cylinder such as air, and the moving mechanism may be an appropriate slide mechanism and be started by operating a start switch, and may be stopped by one reciprocation. Is possible. In this case, safety is a concern, but both the clamp mechanism and the moving mechanism are operated by operating the clamp lever and start switch with one hand, and at the same time, operating the safety switch with the other hand is also required If these are activated, both hands will be away from dangerous places, and safety will be ensured.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial sectional front view of a book grinding device according to the present invention, FIG. 2 is a partial sectional side view, FIG. 3 is a plan view, and FIG. The grinding device is a clamp mechanism 1 for tightening and fixing the book B.
And mounting table 2 for adjusting the height of the ground surface of book B to be tightened
And the moving mechanism 3 for reciprocating the tightened book B right and left.
And a grinding mechanism 4 acting on the book B moved by the moving mechanism 3 to grind the lower end surface thereof. These elements are housed in a box-shaped main body 5.

The clamp mechanism 1 comprises a horizontal base 7 having a frame 6 with a peripheral wall extending in a rectangular shape in the front, and a fluid pressure cylinder (air cylinder in this example) 8 fixed on the base 7. . A push plate 9 is provided at the tip of the rod 8 a of the air cylinder 8, and the push plate 9 is inserted into the frame 6. Therefore, when the air cylinder 8 is extended, the push plate 9 moves forward. Therefore, if the book B is erected in the frame 6, the book B is held by the front plate 6a of the frame 6 and the push plate 9. Tighten it from the front and back to fix it. In this case, the number of books B is not limited to one and may be plural. In addition, the pressing plate 9 of this example
Has a guide bar 8c for inserting the cylinder 8b on both sides of the rod 8a, so that the pressing plate 9 does not become slanted and tightening failure does not occur.

The mounting table 2 is provided below the frame body 6, and has an upper plate 11 having a flat upper surface mounted on a lower plate 10. In this case, the contact surface between the lower platen 10 and the upper platen 11 is formed with a gradient, and both are provided with a screw rod 12 and a nut 13 which are screwed to each other (FIG. 1). . Therefore, when the screw rod 12 is turned, the upper plate 11
Will change steplessly. The book B to be ground is placed on the upper plate 11 between the front plate 6a of the frame and the push plate 9, and then the push plate 9 is advanced and fastened. At this point, the mounting table 2 is for adjusting the height of the lower end surface of the book B to be ground with respect to the grinding mechanism 4 to set the grinding allowance, and the height is adjusted steplessly. Being able means that the grinding allowance can be adjusted steplessly. Further, if the book B is a plurality of books,
It also serves to equalize each height.

The moving mechanism 3 comprises a slider 14 for moving the base 7 on which the air cylinder 8 is mounted, right and left. The slider 14 of this example is of a ball screw type,
The mounting base 17 for extending the ball screw 16 is fixed to the frame 15 constituting the above structure in a left-right direction, and the base 7 is fixed to an upper part of a nut body 18 screwed to the ball screw 16. In this case, a motor M with a speed reducer is attached to one end of the ball screw 16.
Is driven, the base 7 moves right and left.

The grinding mechanism 4 includes a drive drum 19 arranged side by side with the mounting table 2 (in this example, on the left side, this direction is hereinafter referred to as a downstream side), and a driven drum 19 provided further downstream thereof. The grinding belt 21 is attached to the roller 20. In this case, the drive drum 19 is driven by a motor 22 with a speed reducer.
The grinding belt 21 is rotated by the drive of the second rotation. The grinding belt 21 of this example uses a material such as sandpaper in which abrasive grains are fixed to the surface of an endless belt, and is rotated so that the upper surface thereof moves to the upstream side.
In addition, the grinding belt 21 is formed with a gradient that is slightly lowered toward the downstream side.
Grinded only when it comes to the top surface. According to such a grinding belt 21, the life of the abrasive grains can be extended.

In addition, the driven roller 20 of the present embodiment is mounted on a mounting base 24 having a guide bar 23 fixed to the frame 15.
The box 25 is always elastically urged to the downstream side by a spring 26 with respect to the mounting stand 24. Thereby, the tension of the grinding belt 22 is adjusted to be constant, and a beautiful ground surface can be obtained. Further, the driving drum 19 of this embodiment
Has a rubber liner 27 attached to the surface thereof, and a grinding belt 21 is wrapped around the rubber liner 27. Therefore, when the object to be ground (book B) acts on the grinding belt 21, the grinding belt 2
In 1, the rubber liner 27 is elastically deformed and slightly escapes, and the grinding can be performed a plurality of times, so that the beauty of the finish can be secured. In addition, according to the spring 26 and the rubber liner 27, even if the grinding belt 21 is tensioned to the driving drum 19 and the driven roller 20 with a tension that is not too high, the grinding belt 21 is prevented from being unbalanced and disengaged.

Next, a case where the book B is ground by the grinding apparatus having the above configuration will be described. FIG. 5 is a perspective view of the book B. The book B includes a cover a and a body b. In the present invention, the fore edge c including the cover a and the body b and excluding the back, the top d, and the ground e are included. Grind three sides. For this purpose, first, the end surface to be ground is placed on the upper plate 11 of the height reference stand 3 with the end face to be ground down. At this time, the height of the upper platen 11 is slightly lower than the uppermost surface of the grinding belt 21, and the difference between them is a grinding allowance. Next, when the air cylinder 8 is advanced, the book B is clamped with its front and back sandwiched between the push plate 9 and the front plate 6a of the frame 6.

FIG. 6 is an electric circuit diagram of the grinding device, and FIG. 7 is a pneumatic circuit diagram. The air cylinder 8 of this embodiment employs a single-acting type, and is a manual type directional control valve (clamp lever). ) 28 is turned on, so that the rod 8a moves forward. In addition, in this example, the solenoid SOL1 is energized to switch the direction when the safety switch SS1 described later is continuously turned on in the pressure pipe or when the limit switch L3 provided at the end of the forward stroke is depressed and turned on. Directional switching valve 29
Are inserted in series. Therefore, when the rod 8a is advanced and clamped, the safety switch SS1 and the clamp lever 28 must be operated with both hands, so that it is safe without the need to squeeze hands. The switch SW3
Is an unclamping switch for turning off the solenoid SOL1 and retreating the rod 8a to release the clamp.

Since the preparation work has been completed, the start switch SW1 is turned on next. Then, the relay R1 operates to rotate the motor M forward, and the clamp mechanism 1 moves to the downstream side while the book B is tightened (forward going). During this time, the lower end surface of the book B passes over the grinding belt 21. Is ground. When the clamp mechanism 1 reaches the downstream stroke end (L2 is a limit switch installed at this stroke end), the relay R2 operates this time,
The motor M rotates in the reverse direction and the clamp mechanism 1 returns to the upstream side (return) and stops at the original position (L1 is a limit switch installed at this position), and this operation is a series of operations.
Even in this return, the lower end surface of the book B is again
1 to be ground. SW2 is a stop switch for stopping the operation of the moving mechanism 3.

The start switch SW1, the stop switch SW2, the unclamping switch SW2, and the safety switch SS1 are disposed at a safe place such as the upper surface of the main body 5. At this time, the start switch SW1 and the clamp lever are connected. If the safety switch SS1 is disposed on the left side (FIG. 3), the clamp switch 28 must be operated with both hands to observe the state of clamping and grinding. Observation is certain.

In addition, the surroundings of the grinding belt 21 are in a state in which dust of abrasive grains is flying, which is not hygienic. For this reason,
These surroundings are covered with covers 30 or the like, and
Below that, a receiving tray 31 for receiving dust is provided. A dust collector 32 is disposed below the receiving tray 31, and the dust collecting device 32 is connected with a hose 33 or the like so that dust collected in the receiving tray 31 is forcibly sucked into the dust collecting device 32.

As described above, a rubber liner 27 is wound around the drive roller 19 and slightly escapes due to the grinding resistance of the book B. As a result, as shown in FIG. The rough grinding is large, and the re-going is finish grinding with a small grinding amount s2, so that ideal grinding can be performed. In this regard, the thickness and hardness of the rubber liner 27 are important conditions, and a thickness of about 1 to 4 mm and a hardness of about 50 to 80 ° are suitable. Also, the grinding allowance is important.
About 1 mm, especially about 0.3 mm is suitable. 0.3
mm, rough grinding is 0.2-0.25
mm and finish grinding are distributed in the range of 0.1 to 0.05 mm, and the surface is very beautifully finished without waving.
In order to achieve a more beautiful ground surface, the grain size of the abrasive grains must also be increased.
About 80 to $ 100 is suitable.

[0019]

As described above, according to the book grinding apparatus of the present invention, a plurality of books can be automatically clamped and ground automatically, so that labor is saved and the efficiency is further improved. Further, by interposing a rubber liner under the grinding belt, rough grinding and finish grinding can be performed, and the ground surface can be beautifully finished. Furthermore, if both hands are used for the operation of clamping and grinding, safety is ensured.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view of a book grinding apparatus showing an example of the present invention.

FIG. 2 is a partial cross-sectional side view of a book grinding apparatus showing an example of the present invention.

FIG. 3 is a plan view of a book grinding apparatus showing an example of the present invention.

FIG. 4 is an enlarged partial cross-sectional front view of a main part of a book grinding apparatus showing an example of the present invention.

FIG. 5 is a perspective view of a book.

FIG. 6 is an electric circuit diagram of a grinding device showing an example of the present invention.

FIG. 7 is a pneumatic circuit diagram of a grinding device showing an example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clamp mechanism 2 Mounting table 3 Moving mechanism 4 Grinding mechanism 8 Fluid pressure cylinder 21 Grinding belt 28 Clamp lever B Book SW1 Start switch SS1 Safety switch

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Yamanaka 160 Tetsudo, Okayama City, Okayama Prefecture Inside Meiji Kikai Seisakusho Co., Ltd. (72) Inventor Koshi Yoshida 160 Tekka, Okayama City Okayama Pref. Term (reference) 3C043 BB00 DD05 DD12

Claims (6)

[Claims] 1. A grinding device for grinding an end face of a book, wherein the grinding device is configured to clamp one or a plurality of books in an upright state from a front side and a back side, and a book located below the clamp mechanism and not yet tightened. And a moving mechanism for horizontally reciprocating the clamped book together with the clamp mechanism to a position away from the mounting table, and a book moving beside the mounting table. And a grinding mechanism that acts on the lower end surface of the body to grind the same. 2. The book grinding apparatus according to claim 1, wherein the clamping mechanism is performed by tightening a hydraulic cylinder. 3. The book grinding apparatus according to claim 1, wherein the height of the mounting table can be adjusted steplessly. 4. The grinding apparatus according to claim 1, wherein the moving mechanism is started by operating a start switch, and stops after one reciprocation. 5. The polishing apparatus according to claim 1, wherein the grinding mechanism comprises a rotating grinding belt. 6. The clamp mechanism and the moving mechanism are operated by operation of a clamp lever and a start switch by one hand, respectively, and in this case, operation of a safety switch by the other hand is required at the same time. A book grinding apparatus according to any one of claims 1 to 5.