JPS6096496A - Detector for tape width in bookbinding machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Ordinary Application] The present invention relates to a spine-pasting type bookbinding machine, and particularly to a device for detecting the width of a spine-pasting tape used in this type of bookbinding machine.

[Prior art]

In conventional spine binding machines, the width of the tape to be used is automatically selected and specified according to the thickness of the book to be bound, and the user of the binding machine can bind the tape of the appropriate width based on this specification. It is inserted into the tape guide of the machine. However,
If the user inserted a tape with a width different from the specified width, especially if the user inserted a tape with a narrower width than the specified width, the tape would fall off from the tape guide, causing binding defects. .

[Purpose of the invention]

SUMMARY OF THE INVENTION In order to eliminate the drawbacks in the prior art described above, the present invention provides a tape width detection device that detects the width of a tape inserted into a tape guide. The tape width detection device of the present invention includes: a pair of tape guides for transporting tape that are slidable in the width direction of the tape; a plurality of light emitting elements provided on one side of a tape transport path; It is composed of a plurality of photodetectors provided on the other side of the tape transport path so as to face each other.

An alarm device equipped with display means or sound generation means can be connected to the tape width detection device of the present invention.

〔Effect of the invention〕

According to the present invention, since the width of the tape inserted into the tape guide can be detected, it is possible to prevent bookbinding defects when a tape having a width narrower than the specified tape is used.

In addition, since the tape guide can slide in the width direction of the tape depending on the thickness of the actual product, it is possible to detect errors in tape selection even if a tape with a width wider than the specified tape is used. No inconvenience will occur.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numerals 1 and 2 are tape guides, which slide as indicated by arrows according to the thickness of the object to be manufactured and stop at positions where the optimal tape width is obtained. Guide grooves 1a and lb extending in the longitudinal direction are provided on opposite sides of the tape guides 1 and 2, and the backing groove f3 extends from the insertion opening 4 to the tape guide into the guide groove of the tape guides 1 and 2. 1 a and 1 b' and transported in the direction of the arrow.

A heat-sensitive adhesive layer 5 (see FIG. 2) is provided on the backing tape 3, and the chie f3 is adhered to the back of the workpiece (not shown). In this embodiment, the back tape 3 has a width of J8f type (30 degrees, θα, j!;
A Qi f with wm ) is illustrated.

As shown in Figures 2 to 3, three light emitting diodes 6a*6b*6c are arranged in a horizontal line below the tape conveyance path near the tape insertion opening of the tape guide. 6a.

There are 3
Phototransistors 7a, 7b, and 7c are arranged. These light emitting elements and light receiving elements are used to detect the hole tape width when inserted into the tape guide 1.2.

Hereinafter, the operation of the tape width detecting device of the present invention will be explained with reference to FIGS.

In this embodiment, it is assumed that among the three types of tapes, a tape with a width of 3.5'α is specified. Therefore, the tag guide #i slides to the position shown in the figure and stops. As shown in Figure 2! -, tcm@ and just in case, it matches the specified tape, so all the light transmitted from light emitting diode 6a * 6b + 6c to photodiode 7a, 7b, 7c It is interrupted by a chi 703 inserted into the tape guide. Therefore, phototransistor 7 a + 7 b
*7 A is all turned off and a regular tape is inserted, and it is judged to be just in case.

Next, when a tape with a width of tOcIrL is inserted as shown in FIG. 3, the width of the inserted tape is shorter than the width of the tape guide, so only the light from the light emitting diode 6c is received by the photodiode 7c. be done. Therefore, photodiodes 7a and 7b are turned off, but photodiode 7c remains on. Accordingly, it is detected that the inserted tape width is narrower than the designated tape width.

Similarly, in FIG. 2, only the photodiode 7b is in the off state, and it is detected that the inserted tape width is narrower than the designated tape width.

In the illustrated embodiment, only a tape width detecting device consisting of a light emitting element and a light receiving element is shown, but an alarm device is connected to this tape width detecting device, and if all phototransistors are not turned off, An alarm signal may be generated to notify the operator of an incorrect tape selection. As a means for notifying the operator, a display means such as a light emitting diode or a liquid crystal display, or a sound generating means such as a buzzer can be used.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a part of a tape width detection device in a bookbinding machine according to the present invention, and FIGS. 2 to 3 are schematic sectional views for explaining the operation of the tape width detection device according to the present invention. be. 1.2...Tape guide, LA, LB・
・・・・・・・・・・・・Guide groove, 3・・・・・・・・・
・Back pasting position, 4...Tape insertion slot,
5......Thermosensitive adhesive layer, 6m, 6b,
6c......Light emitting diode, 7a #
7 b r 7 c... River... Phototransistor.

Claims (1)

[Claims] In a tape width detection device for a bookbinding machine equipped with a pair of tape guides that generally feeds a bookbinding spine tape while supporting both sides in the width direction, the pair of tape guides detects the thickness of the book to be bound. It can be slid in the width direction of the tape according to your needs! A tape width detection device further comprising a plurality of light emitting elements provided on one side of the tape transport path, and a plurality of light receiving elements provided on the other side so as to face the light emitting elements. .