JPH032073B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gluing device for a bookbinding machine.

A conventional gluing device of this kind consists of one glue supply roller whose lower part is immersed in a glue tank, and one or more transfer type glue rollers that come into contact with the roller in sequence. The glue supply roller is a type in which the amount of glue is adjusted by a doctor and the transfer type glue application roller applies the glue to the object to be glued, such as a cover or signature, or a glue supply tank is used to apply the glue directly onto the transfer roller. There is a method in which the adhesive is dropped onto the transfer roller, and the amount of glue is adjusted using a doctor on the transfer roller to apply the glue to the object to be glued.

However, when using the conventional method as described above, it is very difficult to adjust the amount of glue, especially fine adjustment according to the physical properties of the object to be glued, and it is difficult to adjust the amount of glue, especially when the glue is not applied continuously to covers, signatures, etc. The amount of glue on the transfer roller becomes unstable, resulting in many inconveniences such as glue falling onto the conveyor that conveys the cover and the like. Furthermore, when the operation is stopped for a long period of time, such as at night, the glue on the rollers dries and operation becomes impossible, so it is necessary to remove the rollers and clean them. It was difficult to apply the glue.

The present invention has been made in view of the above, and is intended to solve the above-mentioned conventional drawbacks and problems by providing a gluing device as described below.

The gluing device of the present invention will be described in detail with reference to drawing examples.

Reference numeral 1 denotes a double-acting cylinder with rods on both sides, and upper and lower rods 3a and 3b each having a hollow hole 4 inside.
A piston 2 is fitted so that it can move up and down. Note that 5 and 6 are upper and lower ports of the cylinder 1, and 14 is a seal packing. Reference numeral 7 denotes a sliding tube having threaded portions 7a and 7b on its upper and lower outer peripheries, and its lower end is narrowed to form a valve seat 7c. Further, a fitting ring 13 is fitted and fixed in the upper sliding cylinder 7 of the valve seat 7c, and a spring 11 is interposed between the fitting ring 13 and the ball valve body 12 for gluing to the valve seat 7c. The valve seat 7c is rotatably abutted against the valve seat 7c to close the hole, and the lower part of the valve seat 7c is exposed downward. That is, at the lower end of the sliding tube 7,
Ball valve body 12 partially exposed downward with spring 11 interposed
A glued ball valve device R that opens when pressed is provided. The sliding tube 7 configured as described above is inserted into the hollow hole 4 of the both-side rod piston 2 so as to be vertically slidable, and the upper rod 3a is attached to the upper threaded portion 7c.
An adjustment nut 8 that collides with the upper end surface and can adjust the vertical displacement of the sliding tube 7 is provided on the lower threaded portion 7b.
A pressure adjusting nut 9 is screwed into each of the lower rods 3b with a spring 10 interposed between them and the lower end surface of the lower rod 3b. The upper end of the sliding tube 7 is connected to an upper glue tank 18 by a hose 17, so that glue 19 is continuously supplied into the sliding tube 7 by its own weight. In addition, the upper and lower ports 5 and 6 of the cylinder 1 are
Each of them is connected to a pressure fluid unit 22 such as a compressor via a switching valve 20 that is operated by a command from a control panel 21. (See Fig. 5) Next, the operating state of the above embodiment device will be explained.
First, in FIG. 1, when the object 16 to be pasted, such as a cover, is conveyed in the direction of the arrow by the conveyor 15 below and reaches a predetermined position, the switching valve 2 is activated by a command from the control panel 21.
0 is activated, pressure fluid (air) from the pressure fluid unit 22 enters the cylinder 1 from the upper port 5, and the piston 2 is lowered from the top dead center to the bottom dead center as shown in FIG. 2 and stopped. At this time, the ball valve body 12 of the glued ball valve device R at the tip of the sliding tube 7 is attached to the glued object 1.
6 is pressed against the upper surface of the third
As shown in the figure, the valve is slightly distorted and a gap E is created between it and the valve seat 7c, through which the glue inside the sliding tube 7 flows out and the ball valve body 12 moves as the object 16 to be glued moves. As the glue moves, the glue is sequentially transferred and coated onto the object 16 to be glued. When the glue has been applied to a predetermined length and the gluing is completed, the switching valve 20 is activated again in response to a command from the control panel 21 to switch the lower port 6.
Pressure fluid enters the cylinder 1 from the bottom dead center to raise the piston from the bottom dead center to the top dead center to restore the state shown in FIG.
The valve is seated on the valve seat 7c with one restoring force and the valve is closed.

In the embodiment shown in FIG. 6, both repulsive magnets 23 and 24 are provided on both the upper and lower surfaces of the piston 2 and on the upper and lower surfaces of the cylinder 1 in contact with the piston 2, respectively. In other words, the corresponding magnets 23 and 24 have the same type of magnetism of N/N poles or S/S poles. However, in the case of the lever, the magnetic repulsion of the corresponding magnets 23 and 24 provides impact absorption (cushion) and muffling of metallic sounds when the piston 2 reaches the top and bottom dead centers. .

Since this invention is constructed as described above,
By controlling the double-acting double-acting cylinder with rods on both sides, it is possible to reliably apply an appropriate amount of glue to an object to be glued, such as a cover, from an arbitrary position and for an arbitrary length.
In addition, the only place where the glue dries when exposed to air is the ball valve part of the glued ball valve device, so it can be easily cleaned with a cloth or tissue paper, and it is also easy to change the position where the glue is applied. be.

Particularly, in this device, an adjustable locking nut that can be adjusted vertically and that collides with the upper end surface of the upper rod of the piston is installed on the upper part of the sliding tube in which the glued ball valve device is installed at the lower end. Since the pressure adjusting nuts with springs interposed between them and the lower end surfaces of the rods are screwed into each other, first, the vertical movement of the sliding cylinder due to the rotation of the adjusting locking nuts causes pressure contact between the ball valve body and the object to be glued. The glue supply gap in the valve hole that is formed can be variably adjusted, making it easy to finely adjust the amount of applied glue to be supplied.Also, the strength of the intervening spring can be adjusted by rotating the pressure adjustment nut to control the size of the glued ball valve body. Since the pressure applied to the object to be glued can be varied, the contact surface F of the glued ball valve body against the surface of the object to be glued can be made small as shown in Figure 4 A, or increased as shown in Figure 4 B. It has excellent effects such as being easily adjustable and particularly effective on elastic objects to be pasted such as signatures.

[Brief explanation of the drawing]

The drawings show an embodiment of the device of the present invention, and FIG. 1 is a longitudinal sectional front view, FIG. 2 is a longitudinal sectional front view during glue application, and FIG. 3 is an enlarged longitudinal sectional front view of the same glued ball valve device. Figures 4A and 4B are explanatory diagrams showing the state of the contact surface of the ball valve body, Figure 5 is a system block diagram relating to the control device, and Figure 6 is a longitudinal sectional front view of another embodiment. . 1...Cylinder, 2...Piston, 3a...
Upper rod, 3b...Lower rod, 4...Hollow hole, 5, 6...Port, 7...Sliding tube, 7a, 7
b...Threaded part, 7c...Valve seat, 8...Adjustment nut, 9...Pressure adjustment nut, 10, 11...Spring, 12...Ball valve body, 13...Fitting ring, 14...Seal Packing, 15...Conveyor, 16...Gluing object, 17...Hose, 18...Glue tank, 1
9... Glue, 20... Switching valve, 21... Control valve, 2
2... Pressure fluid unit, 23, 24... Magnet,
R... Glued ball valve device, E... Gap, F... Contact surface.

Claims (1)

[Scope of Claims] 1. Pistons are hollow in both the upper and lower rods of a double-acting double-acting cylinder, and a rotatable ball valve body partially exposed downward is pressed into the hollow hole by means of a spring. A glued ball valve device that opens the valve is inserted through a sliding tube provided at the lower end, and an adjustment locking nut that can adjust vertical displacement and collides with the upper end surface of the upper rod is attached to the upper part of the sliding tube. A pressure adjusting nut with a spring interposed between it and the lower end surface of the lower rod is screwed into each, and the upper end of the nut is connected to a glue tank, and as the piston descends, the ball valve body is pressed against the moving object to be glued. A gluing device for a body making machine, characterized in that it rolls to apply gluing to open the valve. 2. The gluing device for a bookbinding machine according to claim 1, wherein repulsive magnets are provided on both the upper and lower surfaces of the piston and the upper and lower surfaces of the cylinder that come into contact with the piston.