JP2011101980A - Auxiliary tank for glue and glue temperature control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To develop a configuration of an auxiliary tank for glue, in which an EVA-based hot-melt adhesive is heated to around 150-160°C that is slightly lower than the optimum coating temperature and supplied to a gluing device of a bookbinding machine, and to develop a glue temperature control method, the configuration and the method being developed so that energy saving is fully considered and electric power consumption is as low as possible. <P>SOLUTION: The auxiliary tank for glue comprises a tank body, a suction pump and a hose, wherein a glue temperature sensor is provided at a proper position of the tank body and a plurality of heaters each having a heater temperature sensor are incorporated in the tank body. In the glue temperature control method, the plurality of heaters of the tank body are controlled in the range of upper limit temperature to lower limit temperature of the heaters until the glue temperature reaches an upper limit temperature, then, when the glue temperature reaches the upper limit temperature, the glue temperature is mainly controlled in the range of upper limit temperature to lower limit temperature of the glue temperature. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a glue auxiliary tank for supplying glue to a gluing device that discharges glue from a nozzle and a glue temperature control method, and more particularly, to a glue auxiliary tank and glue temperature having the following configuration. It relates to a control method.
<Configuration 1>
In the auxiliary tank for glue that supplies glue to the glueing device of the bookbinding machine,
The whole consists of a tank body, a suction pump and a hose,
The tank body is composed of an upper part and a lower part that are assembled together, and has an upper heater at the upper part and a lower heater at the lower part.
The upper part has an upper surface and a lower surface and a bottom part with a raised heater on a part of the lower part and a bottom part with ribs provided, and a convex part projecting downward on the lower surface of the bottom part is integrated with the upper part. It is configured so that the heat of the upper heater can be distributed to the lower part,
The lower part has an upper surface opened and a lower surface closed, and a glue supply hole is formed in the lower surface. A suction pump having a heater is connected to the glue supply hole, and a hose having a heater is connected to the suction pump. It is configured to supply glue to the gluing device of the bookbinding machine with a hose,
The tank body has a paste temperature sensor that detects the temperature of the paste inside the tank body.
An upper heater having a heater temperature sensor for detecting the heater temperature is stored in each of the thick portions at two or more of the lower end portion of the upper side wall of the tank body or the bottom portion near the side wall. Has been
A built-up heater having a heater temperature sensor for detecting a heater temperature is stored inside a built-up section provided at the bottom of the upper part of the tank body,
A rib is protruded integrally with the top from the top, and the heat of the top heater can be distributed to the entire bottom of the top of the tank body,
A lower heater having a heater temperature sensor for detecting a heater temperature is housed in each of the thick portions where two or more portions from the side surface to the bottom surface of the lower portion of the tank main body are thick portions.
A pump heater that incorporates a heater temperature sensor that detects the heater temperature in the suction pump connected to the lower glue supply hole is provided.
The hose connected to the suction pump is provided with a hose heater that incorporates a heater temperature sensor that detects the heater temperature.
The temperature information of the heater for the pump is controlled by controlling the operation of the upper heater, the upper heater, and the lower heater based on the temperature information of the glue temperature sensor and the upper heater, the upper heater, and the lower heater. A controller for controlling the heater for the pump based on the temperature information of the heater for the hose based on the temperature information of the heater for the hose is provided,
This is an auxiliary tank for glue.
<Configuration 2>
A glue temperature sensor is provided anywhere below the center of the tank body,
The upper heater, the upper heater, and the lower heater are cartridge type heaters, and the heater temperature sensor of each heater is provided inside or attached to each heater to control the temperature of each heater. It is configured to measure directly,
A pump heater is wound around a suction pump by a cover heater, and a heater temperature sensor is provided inside the cover heater so that the temperature of the cover heater can be directly measured.
A heater for a hose is wound around a hose with a cord heater, and a heater temperature sensor is provided attached to the cord heater so that the temperature of the cord heater can be directly measured.
The auxiliary tank for glue according to Configuration 1, wherein
<Configuration 3>
The upper part of the tank body has a prismatic shape with a substantially square shape in plan view, and the upper heaters are respectively stored in the thick portions at the lower ends of the two side walls facing each other,
The upper part located in the center of the bottom of the upper part of the tank body has a substantially triangular cross section and extends parallel to the side wall in which the upper heater is stored. Stored parallel to the upper heater,
A rib having a substantially triangular cross section perpendicular to the upper portion is formed integrally with the upper portion, and the other end of the rib is integrally joined to the upper side wall of the tank body.
The lower part of the tank body has a substantially square shape whose upper surface can be integrally joined to the lower surface of the upper part of the tank body, the bottom surface of the lower part is bowl-like, and the bowl-like part is a thick part, and the thick part faces The lower heater is stored in each position,
The auxiliary tank for glue according to Configuration 1 or Configuration 2, wherein
<Configuration 4>
Whether the shortest distance from the upper heater to the inner surface of the upper side wall where the upper heater is stored is equal to the shortest distance from the lower heater to the inner surface of the lower upper part where the lower heater is stored Is greater than
The shortest distance from the top heater to the surface of the top is greater than the shortest distance to the inner surface of the upper side wall in which the upper heater is stored,
The auxiliary tank for glue according to Configuration 3, wherein:
<Method 1>
In the auxiliary tank for glue according to any one of Configurations 1 to 4, each of the upper heater, the upper heater, and the lower heater is
A first step of controlling and operating at a preset upper limit temperature and lower limit temperature of each heater temperature sensor until the glue temperature reaches a preset upper limit temperature of the glue temperature sensor;
A second step of operating after the glue temperature reaches the preset upper limit temperature of the glue temperature sensor and is controlled by the preset upper limit temperature of the glue temperature sensor and the preset lower limit temperature of the glue temperature sensor;
Operated by controlled by,
The paste temperature control method characterized by the above-mentioned.
<Method 2>
In the first step, each of the upper heater, the upper heater, and the lower heater is
When the preset upper limit temperature of each heater temperature sensor is reached, it becomes inoperative,
When it reaches the preset lower limit temperature of each heater temperature sensor, it will be in the operating state.
Controlled to operate,
The method for controlling a paste temperature according to Method 1, which is characterized in that
<Method 3>
In the second step, each of the upper heater, the upper heater, and the lower heater is
When the glue temperature sensor reaches the preset upper limit temperature, it becomes inactive,
When the glue temperature sensor reaches the preset lower limit temperature, it will be activated,
Even if the glue temperature sensor has not reached the preset upper limit temperature, each heater temperature sensor becomes non-operational when it reaches the preset upper limit temperature.
Controlled to operate,
The method for controlling the paste temperature according to Method 1 or Method 2, wherein:
<Method 4>
Pump heater and hose heater
When the preset upper limit temperature of each heater temperature sensor is reached, it becomes inoperative,
When it reaches the preset lower limit temperature of each heater temperature sensor, it will be in the operating state.
Controlled to operate,
The paste temperature control method according to Method 1, 2 or 3, wherein
<Method 5>
In the upper heater, the upper heater, and the lower heater, the preset upper limit temperature of each heater is
The upper limit temperature of the upper heater is set higher than the upper limit temperature of the upper heater,
The upper limit temperature of the upper heater is set equal to or higher than the upper limit temperature of the lower heater,
The paste temperature control method according to Method 1 or Method 2 or Method 3 or Method 4 characterized by the above.

  2. Description of the Related Art Conventionally, a gluing device incorporated in a part of a bookbinding machine and gluing with a roller on the back of a collated book is well known. As an example, the following Patent Documents 3 and 4 are listed. Since such a gluing device generally has a small tank capacity, a large capacity auxiliary tank for gluing is generally used. That is, paste (hot melt adhesive) that is in a solid state at room temperature is poured into a large-capacity auxiliary auxiliary tank and melted by a heater provided in the auxiliary auxiliary tank for paste, and the paste in a fluid state is sucked into the suction pump And the hose are guided to the gluing device of the bookbinding machine and supplied to the tank of the gluing device. Even when the supplied glue is at a temperature lower than the optimum application temperature, it is set to the optimum application temperature by being heated in the tank of the gluing device, and is applied to the back of the collated book by a roller.

  The gluing devices listed in the following Patent Documents 3 and 4 use the newly introduced PUR hot melt adhesive, but in the present invention, the EVA hot melt adhesive that has been used before is used. It is assumed. Hereinafter, the term “glue” in this specification means this EVA hot melt adhesive. The optimum application temperature of EVA hot melt adhesive is about 180 ° C., but in the present invention, normal temperature solid EVA hot melt adhesive is put into an auxiliary tank for glue and dissolved in the tank. In particular, an object of the present invention is to supply glue heated to about 150 ° C. to a gluing device of a bookbinding machine through a suction pump and a hose.

  The invention disclosed in the following Patent Document 1 describes “Hot Melt Applicator 1” including “Tank 2”, “Pressure Pump 3”, and “Motor 4”. The entire structure including the “heating hose 6” corresponds to the “auxiliary tank for glue” according to the present invention, and the present invention combines the suction pump with a motor and the hose to the tank main body. A new configuration of this “auxiliary tank for glue” and a glue temperature control method are proposed.

  Regarding the structure of the tank body, a structure as shown in Patent Document 2 below has been proposed. However, in the case of the auxiliary tank for glue having such a configuration, the glue in the tank is simply melted and made into a fluid state by the heater, so that the temperature of the glue increases rapidly and the deterioration of the glue is noticeable. Two problems have been pointed out in the past, that is, power consumption is large and energy efficiency is poor.

  First, the first problem is as follows. That is, in the case of an auxiliary tank for glue as shown in Patent Document 2 below, since the temperature cannot be strictly controlled with respect to the heater, basically the heater remains overheated from the start to the end of the work. The glue is in a fluid state at a temperature considerably higher than 180 ° C. (220 ° C. in the following Patent Document 2), which is the optimum application temperature of the paper, and is passed through a suction pump with a heater and a hose with a heater to the glue device of the bookbinding machine. Supply. Certainly, if the tank body is set to be considerably higher than the optimum application temperature of the glue, even if a large amount of paste at room temperature is supplied into the tank body, the glue will not partially melt. Alternatively, the glue temperature is rarely lowered, and the glue is always supplied while maintaining the smooth flow state.

However, it is also true that the paste deteriorates rapidly when it is always heated considerably higher than the optimum application temperature. In particular, when the amount of glue in the tank body decreases, the temperature of the glue becomes considerably high, and the deterioration proceeds more rapidly. EVA hot melt adhesives are in a fluid state that can be sent by a hose when heated to about 150 ° C. Ideally, the temperature of the glue in the hose in the "auxiliary tank for glue" is as high as about 150 ° C. Is also supplied to the gluing device of the bookbinding machine so that it stays at about 160 ° C., and is heated to 180 ° C., which is the optimum application temperature, in the tank of the gluing device of the bookbinding machine. From the viewpoint, the glue can be supplied to the gluing device of the bookbinding machine in an optimum state. However, in the “tank” as disclosed in Patent Document 2 below, the glue temperature cannot be strictly controlled as described above. Therefore, the glue temperature is set to a high temperature tendency in order to ensure the fluidity of the glue. To do. As a result, deterioration of the glue sent to the gluing device of the bookbinding machine is often seen, and the deteriorated glue generates a bookbinding failure, which has been one of the major problems in the bookbinding process.

Next, as a second problem, the power consumption is unnecessarily increased in the “tank” configured as disclosed in Patent Document 2 below. That is, as described above, in such a tank, in order to keep the temperature in the tank at a high temperature of 220 ° C. from the start time to the end time of the work, the heater is always in an overheated state. Yes, the amount of power consumption increases.

Traditionally, in an era where the publishing industry was booming, there were many book publications, and there were many printed bookbinding copies of a single publication, the bookbinding machine was in full operation, and the amount of glue consumed was high. The auxiliary tank for glue that supplies glue to the pasting apparatus was not so much a problem even if it consumed a large amount of electric power in a high temperature overheating state all day. However, during the current recession of the publishing, there are many bookbinding centers where the bookbinding machines do not become fully operational when the number of printed materials and the number of copies have been drastically decreasing. Under these circumstances, it is useless to continue supplying a large amount of power to the glue auxiliary tank throughout the day, and if the hot standby state continues for a long time, the glue itself is wasted due to deterioration of the overheated glue. End up. Further, by supplying such glue to the gluing device of the bookbinding machine, it is unavoidable that defective books are generated as described above. Therefore, from the viewpoint of energy saving, avoiding waste of glue, and also from the viewpoint of avoiding defective books, we reviewed the configuration of the conventional high-temperature holding type glue auxiliary tank when necessary. The development of an auxiliary tank for glue that reliably supplies the glue without the necessary temperature degradation has emerged as an urgent issue.

Regarding the problem of temperature management of the PUR type hot melt adhesive in the gluing device of the bookbinding machine, the patent of the following Patent Document 4 has been previously acquired by the present inventor. This solves the temperature management problem in the tank of the gluing device of the bookbinding machine, and can be applied as it is to the configuration and temperature management of the glue auxiliary tank of this time with different types of glue and completely different physical structures. Of course, the present inventor made use of the experience of solving the temperature management problem of the PUR type hot melt adhesive in the gluing device of the bookbinding machine, and this time the EVA type hot melt adhesive was used. Various experiments were repeated to solve the problem of temperature management of the auxiliary glue tank used, and the configuration of the present invention and the temperature control system were successfully developed.

The patent documents mentioned above are as follows.
JP-A-9-225373 JP-A-11-165112 JP 2002-45746 A JP 2009-083392

  As mentioned above, the subject of this invention was set as follows. That is, the construction and temperature control method of an auxiliary tank for glue capable of heating an EVA hot melt adhesive to about 150 ° C., which is slightly lower than the optimum application temperature, and supplying it to the pasting apparatus of the bookbinding machine will be developed. At this time, the energy consumption should be taken into consideration and the power consumption should be as low as possible. In addition, it is natural that the temperature of the glue supplied from the hose should be a constant temperature of about 150 ° C., regardless of whether the amount of glue put into the tank body of the auxiliary glue tank is large or small. That is. Furthermore, in the configuration of the tank body and the temperature control method, the simplest configuration and method are used as much as possible from the viewpoint of suppressing the occurrence of failure and reducing the manufacturing cost. More specifically, a configuration of an auxiliary tank for glue and a method for controlling the paste temperature, which can achieve desired effects with a simple configuration and a simple program, without using a complicated configuration or an expensive program shall be developed.

The present invention has been made to solve the above problems, and provides the following means for solving the problems.
<Solution 1>
In the auxiliary tank for glue that supplies glue to the glueing device of the bookbinding machine,
The whole consists of a tank body, a suction pump and a hose,
The tank body is composed of an upper part and a lower part that are assembled together, and has an upper heater at the upper part and a lower heater at the lower part.
The upper part has an upper surface and a lower surface and a bottom part with a raised heater on a part of the lower part and a bottom part with ribs provided, and a convex part projecting downward on the lower surface of the bottom part is integrated with the upper part. It is configured so that the heat of the upper heater can be distributed to the lower part,
The lower part has an upper surface opened and a lower surface closed, and a glue supply hole is formed in the lower surface. A suction pump having a heater is connected to the glue supply hole, and a hose having a heater is connected to the suction pump. It is configured to supply glue to the gluing device of the bookbinding machine with a hose,
The tank body has a paste temperature sensor that detects the temperature of the paste inside the tank body.
An upper heater having a heater temperature sensor for detecting the heater temperature is stored in each of the thick portions at two or more of the lower end portion of the upper side wall of the tank body or the bottom portion near the side wall. Has been
A built-up heater having a heater temperature sensor for detecting a heater temperature is stored inside a built-up section provided at the bottom of the upper part of the tank body,
A rib is protruded integrally with the top from the top, and the heat of the top heater can be distributed to the entire bottom of the top of the tank body,
A lower heater having a heater temperature sensor for detecting a heater temperature is housed in each of the thick portions where two or more portions from the side surface to the bottom surface of the lower portion of the tank main body are thick portions.
A pump heater that incorporates a heater temperature sensor that detects the heater temperature in the suction pump connected to the lower glue supply hole is provided.
The hose connected to the suction pump is provided with a hose heater that incorporates a heater temperature sensor that detects the heater temperature.
The temperature information of the heater for the pump is controlled by controlling the operation of the upper heater, the upper heater, and the lower heater based on the temperature information of the glue temperature sensor and the upper heater, the upper heater, and the lower heater. A controller for controlling the heater for the pump based on the temperature information of the heater for the hose based on the temperature information of the heater for the hose is provided,
This is an auxiliary tank for glue.
<Solution 2>
A glue temperature sensor is provided anywhere below the center of the tank body,
The upper heater, the upper heater, and the lower heater are cartridge type heaters, and the heater temperature sensor of each heater is provided inside or attached to each heater to control the temperature of each heater. It is configured to measure directly,
A pump heater is wound around a suction pump by a cover heater, and a heater temperature sensor is provided inside the cover heater so that the temperature of the cover heater can be directly measured.
A heater for a hose is wound around a hose with a cord heater, and a heater temperature sensor is provided attached to the cord heater so that the temperature of the cord heater can be directly measured.
The auxiliary tank for glue according to Solution 1, characterized in that:
<Solution 3>
The upper part of the tank body has a prismatic shape with a substantially square shape in plan view, and the upper heaters are respectively stored in the thick portions at the lower ends of the two side walls facing each other,
The upper part located in the center of the bottom of the upper part of the tank body has a substantially triangular cross section and extends parallel to the side wall in which the upper heater is stored. Stored parallel to the upper heater,
A rib having a substantially triangular cross section perpendicular to the upper portion is formed integrally with the upper portion, and the other end of the rib is integrally joined to the upper side wall of the tank body.
The lower part of the tank body has a substantially square shape whose upper surface can be integrally joined to the lower surface of the upper part of the tank body, the bottom surface of the lower part is bowl-like, and the bowl-like part is a thick part, and the thick part faces The lower heater is stored in each position,
The auxiliary tank for glue according to Solution 1 or Solution 2 characterized by the above.
<Solution 4>
Whether the shortest distance from the upper heater to the inner surface of the upper side wall where the upper heater is stored is equal to the shortest distance from the lower heater to the inner surface of the lower upper part where the lower heater is stored Is greater than
The shortest distance from the top heater to the surface of the top is greater than the shortest distance to the inner surface of the upper side wall in which the upper heater is stored,
The auxiliary tank for glue according to Solution 3, wherein
<Solution 5>
In the glue auxiliary tank according to any one of Solution 1 to Solution 4, each of the upper heater, the upper heater, and the lower heater is:
A first step of controlling and operating at a preset upper limit temperature and lower limit temperature of each heater temperature sensor until the glue temperature reaches a preset upper limit temperature of the glue temperature sensor;
A second step of operating after the glue temperature reaches the preset upper limit temperature of the glue temperature sensor and is controlled by the preset upper limit temperature of the glue temperature sensor and the preset lower limit temperature of the glue temperature sensor;
Operated by controlled by,
The paste temperature control method characterized by the above-mentioned.
<Solution 6>
In the first step, each of the upper heater, the upper heater, and the lower heater is
When the preset upper limit temperature of each heater temperature sensor is reached, it becomes inoperative,
When it reaches the preset lower limit temperature of each heater temperature sensor, it will be in the operating state.
Controlled to operate,
The paste temperature control method according to Solution 5, wherein:
<Solution 7>
In the second step, each of the upper heater, the upper heater, and the lower heater is
When the glue temperature sensor reaches the preset upper limit temperature, it becomes inactive,
When the glue temperature sensor reaches the preset lower limit temperature, it will be activated,
Even if the glue temperature sensor has not reached the preset upper limit temperature, each heater temperature sensor becomes non-operational when it reaches the preset upper limit temperature.
Controlled to operate,
The paste temperature control method according to Solution 5 or Solution 6, wherein the paste temperature is controlled.
<Solution 8>
Pump heater and hose heater
When the preset upper limit temperature of each heater temperature sensor is reached, it becomes inoperative,
When it reaches the preset lower limit temperature of each heater temperature sensor, it will be in the operating state.
Controlled to operate,
The paste temperature control method according to Solution 5, Solution 6, or Solution 7, characterized in that:
<Solution 9>
In the upper heater, the upper heater, and the lower heater, the preset upper limit temperature of each heater is
The upper limit temperature of the upper heater is set higher than the upper limit temperature of the upper heater,
The upper limit temperature of the upper heater is set equal to or higher than the upper limit temperature of the lower heater,
The glue temperature control method according to Solution 5, Solution 6, Solution 7, or Solution 8, wherein:

According to the invention of Solution 1 of the present invention, the auxiliary tank for glue according to the present invention has a number of heaters arranged at appropriate positions in the tank body so that the tank body can be heated uniformly. The paste contained in can be heated evenly to the required temperature. That is, the tank body is composed of an upper part and a lower part, and an upper part is provided with an upper heater at an appropriate part of the upper part, a lower heater at an appropriate part of the lower part, and further having an upper part heater on the upper bottom surface. And a rib for transferring heat of the upper portion to the periphery and a convex portion of the lower surface of the upper portion, so that the inside of the tank body is heated evenly, and EVA hot melt adhesive is applied to the bookbinding machine. It is possible to heat and hold at an optimum temperature for supplying to the gluing device. This is a big improvement from the point that the conventional auxiliary tank for glue is heated at a high temperature exceeding 200 ° C., and the problem of paste deterioration which has been a big problem in the past is completely solved. As a result, the occurrence of defective books can be suppressed. In addition, power consumption is low, and significant improvements have been seen in energy saving problems.

According to the invention of Solution 1 of the present invention, the tank body is provided with a glue temperature sensor, and each of the upper heater, the lower heater, and the upper heater is provided with a heater temperature sensor. Since the information from the heater temperature sensor is sent to the control device and the operation of each heater is controlled by the control device, strict temperature control is possible. Therefore, it is also possible to manage the paste temperature within a range of ± 5 ° C, which makes it possible to achieve almost no degradation of the paste and achieve the highest level of power saving. It was. Also, appropriate temperature control can be achieved regardless of whether the amount of glue contained in the tank body is large or small.

Furthermore, according to the invention of Solution 1 of the present invention, the temperature sensor is provided in each of the pump heater of the suction pump and the hose heater of the hose, and the operation of the pump heater and the hose heater is controlled by the control device. Since the temperature is controlled, strict temperature control is possible for both the suction pump and the hose, and the paste can be supplied to the gluing device of the bookbinding machine while maintaining the range of ± 5 ° C.

According to the invention of Solution 2 of the present invention, since the glue temperature sensor is provided at any position below the center of the upper part of the tank body, the temperature of the glue contained in the tank body is appropriately set. It is possible to measure.

Similarly, according to the invention of Solution 2 of the present invention, the upper heater, the upper heater, and the lower heater are cartridge-type heaters, and the heater temperature sensor of each heater is provided in each heater or in each heater. The heater for the pump is wound around the suction pump by the cover heater, and the heater temperature sensor is provided inside the cover heater. The temperature of the cover heater can be directly measured, the hose heater is wound around the hose by a cord heater, and a heater temperature sensor is provided along with the cord heater to provide a temperature of the cord heater. Because it is configured so that the measured temperature information can be directly measured, there is very little error in the measured temperature information, and accurate temperature control is possible with the control device. .

Next, according to the invention of Solution 3 of the present invention, the upper portion of the tank main body has a prismatic shape with a substantially square shape in plan view, and the thick portions at the lower end portions of the two side walls facing the upper heater are respectively provided. Since it is stored, the four corners near the bottom of the upper part of the tank body are heated evenly.

  Further, according to the invention of Solution 3 of the present invention, the upper portion located at the center of the bottom of the upper portion of the tank body has a substantially triangular cross section and is extended in parallel with the side wall in which the upper heater is stored. The upper heater is stored in parallel with the upper heater below the substantially triangular cross section, and a rib with a substantially triangular cross section perpendicular to the upper section is formed integrally with the upper section. Since it is integrally joined to the upper side wall of the tank body, the entire bottom part of the upper part of the tank body is uniformly heated.

Further, according to the invention of Solution 3 of the present invention, the lower part of the tank body has a substantially square shape whose upper surface can be integrally joined to the lower surface of the upper part of the tank body, and the bottom surface of the lower part is bowl-like, and the bowl-like part. Since the lower heaters are housed at the positions where the thick portions oppose each other, the lower portion of the tank body is uniformly heated. Furthermore, since the convex part which protrudes downward to the bottom part of the upper part described in the solution means 1 is located at the center of the lower part when the upper part and the lower part of the tank main body are combined, the convex part is also added. The lower part of the tank body is heated evenly.

Next, according to the invention of Solution 4 of the present invention, the shortest distance from the upper heater to the inner surface of the upper side wall in which the upper heater is stored is the lower part in which the lower heater is stored from the lower heater. The shortest distance from the top heater to the top surface is the shortest distance to the inner surface of the upper side wall where the upper heater is stored. Since it is larger than the distance, it is possible to heat the paste in the tank body more evenly.

That is, the reason why the shortest distance from the upper heater to the inner surface of the upper side wall is equal to or greater than the shortest distance from the lower heater to the inner surface of the lower upper part is that the upper heater must distribute heat. This is because the volume of space that must be larger than the volume of space that the lower heater must deliver heat to. That is, when it is desired to distribute heat to a larger space, the shortest distance from the heater to the surface is slightly increased, and the set temperature of the heater is slightly increased, so that heat can be supplied evenly.

The reason why the shortest distance from the top heater to the surface of the top is larger than the shortest distance from the top heater to the inner surface of the upper side wall is the same as above, and the top heater is integrated with the top and top. Heat must be supplied uniformly to all of the ribs connected to and the convex part projecting downward on the central bottom surface of the heap, but if the shortest distance from the heap heater to the surface of the heap is too short, This is because only the periphery of the upper portion is heated and the heat is dissipated here, and sufficient heat is not supplied to the ribs and the convex portions. In such a case, the paste at the overheated portion deteriorates, whereas the paste at the portion that is not sufficiently heated has a high viscosity and is difficult to flow. Such a situation can be avoided by making the shortest distance from the top heater to the surface of the top higher and by increasing the temperature setting of the top heater accordingly.

Next, according to the invention of Solution 5 of the present invention, each of the upper heater, the upper heater, and the lower heater has each heater temperature sensor until the glue temperature reaches the preset upper limit temperature of the glue temperature sensor. Since the first step is operated under the control of the preset upper limit temperature and the lower limit temperature, the upper heater and the upper part are kept until the glue temperature reaches the preset upper limit temperature of the glue temperature sensor. Each of the heater and the lower heater can increase the temperature of the paste without exceeding the preset upper limit temperature of the own heater and smoothly as a whole without stagnation. In addition, there is no worry that each of the lower heaters overheats, and it can greatly contribute to power saving.

Also according to the invention of Solution 5 of the present invention, after the glue temperature reaches the upper limit temperature of the preset glue temperature sensor, the upper limit temperature of the glue temperature sensor set in advance, the glue temperature sensor set in advance The second step, which is controlled and operated at a lower temperature limit of
After the glue temperature reaches the preset upper limit temperature of the glue temperature sensor, the glue temperature is mainly controlled to the upper limit temperature and the lower limit temperature of the glue temperature sensor, so that the glue temperature is kept within a certain range. The In addition, since the upper heater, the upper heater, and the lower heater do not exceed their own preset upper limit temperatures, the upper heater, the upper heater, and the lower heater do not overheat.

  Next, according to the invention of the solving means 6 of the present invention, when each of the upper heater, the upper heater, and the lower heater reaches the preset upper limit temperature of each heater temperature sensor in the first step. It is controlled to operate so that it becomes an inoperative state, and when it reaches a preset lower limit temperature of each heater temperature sensor, it enters an activated state. That is, as the control method, the control of the upper heater, the upper heater and the lower heater is repeatedly turned on and off according to the temperature information from its own heater temperature sensor, so it is extremely simple and requires a complicated control program. It is not necessary, and the desired effect can be obtained accurately.

Next, according to the invention of Solution 7 of the present invention, in the second step, the upper heater, the upper heater, and the lower heater are not activated when the glue temperature sensor reaches a preset upper limit temperature. When the glue temperature sensor reaches the preset lower limit temperature, the heater is activated, and even if the glue temperature sensor does not reach the preset upper limit temperature, each heater temperature sensor reaches the preset upper limit temperature. When it reaches, it is controlled so that it becomes inactive.

  That is, as a control method, when the glue temperature sensor reaches a preset upper limit temperature, the heater that is on (operating state) is turned off (non-actuated), and the glue temperature sensor is set to a preset lower limit. The basic control is based on the extremely simple control of turning the heater in the off state (non-operating state) on (operating state) when the temperature is reached, so no complicated control program is required and the desired effect Can be mentioned. Furthermore, since each of the temperature sensors of the upper heater, the upper heater, and the lower heater reaches an upper limit temperature set in advance, the heater is turned off (non-operating state). Therefore, overheating of the heater is prevented with a simple program. be able to.

Next, according to the invention of Solution 8 of the present invention, when the heater for the pump and the heater for the hose reach a preset upper limit temperature of each heater temperature sensor, the heater temperature sensor becomes inoperative. Since it is controlled and operated so that it will be in the operating state when it reaches the preset lower limit temperature, it becomes possible to strictly manage the glue temperature in the suction pump and the glue temperature in the hose with only simple settings. . Further, overheating of the heater for the pump and the heater for the hose can be prevented. The suction pump and the hose serve as the final stage of the glue auxiliary tank according to the present invention and serve to supply glue whose temperature is strictly controlled by the tank body to the glueing device of the bookbinding machine. It is very important that the temperature can be controlled properly.

Next, according to the invention of Solution 9 of the present invention, in the upper heater, the upper heater, and the lower heater, the preset upper limit temperature of each heater is
The upper limit temperature of the upper heater is set higher than the upper limit temperature of the upper heater, and the upper limit temperature of the upper heater is set equal to or higher than the upper limit temperature of the lower heater. This temperature setting corresponds to the configuration of the solution means 4, and the glue temperature in the vicinity of each heater becomes too high by this method of setting the upper limit temperature of the heater having the longest shortest distance to the surface higher. The heater with the shortest distance to the surface can supply a large amount of heat to the surroundings and the deterioration of the glue near the surface of the heater with the shortest distance to the surface can be prevented. Is. In particular, the upper heater must supply heat to the ribs and projections that are integrally connected to the upper and upper parts, so the upper limit temperature is about 40-50 ° C higher than the upper and lower heaters. Must be set.

It is a longitudinal cross-sectional view of the tank main body of the auxiliary tank for glue of Example 1 of this invention. It is an enlarged view of the principal part of FIG. It is a top view of the tank main body of the auxiliary tank for glue of Example 1 of the present invention. (A) It is a top view of the upper part of the tank main body of the auxiliary tank for glue of Example 1 of this invention. (B) It is a bottom view of the upper part of the tank main body of the auxiliary tank for glue of Example 1 of this invention. (A) It is a top view of the lower part of the tank main body of the auxiliary tank for glue of Example 1 of this invention. (B) It is a bottom view of the lower part of the tank main body of the auxiliary tank for glue of Example 1 of this invention. (A) It is the front view which abbreviate | omitted a part of upper part of the tank main body of the auxiliary tank for glue of Example 1 of this invention. (B) It is the right view which abbreviate | omitted a part of upper part of the tank main body of the auxiliary tank for glue of Example 1 of this invention. (A) It is a front view of the lower part of the tank main body of the auxiliary tank for glue of Example 1 of this invention. (B) It is a right view of the lower part of the tank main body of the auxiliary tank for glue of Example 1 of this invention. In the auxiliary tank for glue of Example 1 of this invention, it is explanatory drawing for demonstrating the connection relationship of a tank main body, a suction pump, a motor, a hose, and a control apparatus. It is the external appearance perspective view which notched a part of upper part of the tank main body of the auxiliary tank for glue of Example 1 of this invention. (A) It is the external appearance perspective view seen from the lower part of the tank main body of the auxiliary tank for glue of Example 1 of this invention. (B) It is the external appearance perspective view seen from the lower part of the tank main body of the auxiliary tank for glue of Example 1 of this invention. It is explanatory drawing for demonstrating the assembly structure of the upper part of the tank main body of the auxiliary tank for glue of Example 1 of this invention, and BR> bottom lower part. The system configuration of each heater of the auxiliary tank for glue according to the first embodiment of the present invention, the lower heater, the upper heater, the heater for the pump, the heater for the hose, the heater temperature sensor of each heater, and the controller is schematically described. It is explanatory drawing for doing. Explanatory drawing for demonstrating the upper limit temperature and lower limit temperature of each heater and glue temperature sensor of the upper heater of the auxiliary tank for glue of the first embodiment of the present invention, the lower heater, the upper heater, the heater for the pump, the heater for the hose, and It is a list. It is a graph for demonstrating the temperature control method of Example 1 of this invention. In the temperature control method of Example 1 of this invention, it is a graph for demonstrating the temperature control method after the paste temperature reaches | attains an upper limit. It is a flowchart for demonstrating the temperature control method of Example 1 of this invention.

  EMBODIMENT OF THE INVENTION The form for implementing invention of Example 1 of this invention is demonstrated in detail, referring drawings below. 1 to 11 are drawings for explaining the configuration of the auxiliary glue tank GT according to the first embodiment of the present invention. FIG. 12 shows the configuration of the control system for the auxiliary glue tank GT according to the first embodiment of the present invention. FIG. 13 to FIG. 16 are diagrams for explaining a paste temperature control method for the auxiliary glue tank GT according to the first embodiment of the present invention.

  As shown in FIG. 8, the paste auxiliary tank GT according to the first embodiment of the invention includes a metal tank body T composed of an upper part 1 and a lower part 2, a suction pump 3 connected to the lower part 2 of the tank body T, and a suction pump. 3, a flexible hose 4 connected to 3, a tank body T (upper part 1, lower part 2), a suction pump 3, and a control device 5 connected to the hose 4. In actual use, the tank body T is covered with a heat insulating material HS as indicated by a virtual line (two-dot chain line).

  1 to 11 show the detailed configuration of the tank body T. FIG. The tank body T is configured by assembling the upper part 1 and the lower part 2 together, and a space R for accommodating the glue G is provided therein. The space R includes an upper internal space R1 and a lower internal space R2. GL in FIG. 1 is the lowest upper surface line of the glue G, and the upper surface line of the glue G is always used as a position higher than the lowest upper surface line GL shown in FIG. This lowest upper surface line GL is the limit at which the glue temperature sensor 60 can correctly measure the temperature of the glue G, and also corresponds to the height of the top of the substantially upper portion 17. That is, the upper portion 17 cannot be properly heated unless most of it is immersed in the glue G.

The upper surface 1 and the lower surface 12 of the upper part 1 of the tank body T are opened, and the front surface 13, the back surface 14, the left side surface 15, and the right side surface 16, which are side walls, are substantially rectangular plates, respectively. 15 and the right side surface 16 are configured integrally, so that the whole is a square tube having a substantially square shape in plan view. The upper surface 11 of the upper part 1 is completely open, but the lower surface 12 is partially open, and part of the bottom is composed of a raised portion 17, ribs 18 a to 18 d and a convex portion 19, which will be described in detail later. U is configured.

  A front surface 13 of the upper portion 1 has a flange 13a projecting integrally with the front surface 13 in the front direction at the lower end portion, and the flange 13a has three through-hole screw holes Ha as shown in FIGS. , Ha, Ha are drilled. Further, the back surface 14 of the upper portion 1 has a flange 14a projecting integrally with the back surface 14 in the back direction at the lower end portion, and the flange 14a has through-type screws at three locations as seen in FIGS. 4b and 11. Holes Ha, Ha, Ha are drilled.

  The left side surface 15 of the upper part 1 is formed with a thick hole 15b at the lower end and a circular hole 15a penetrating from the front to the back. The upper heater 61 is accommodated in the circular hole 15a. . C61 is a cord connected to the upper heater 61. As shown in FIGS. 4b and 11, non-penetrating type screw holes Hb, Hb, and Hb are formed in the bottom surface of the thick portion 15b.

Further, the right side surface 16 of the upper portion 1 has a lower end portion which is a thick portion 16b and is provided with a circular hole 16a penetrating from the front side to the back side, and an upper heater 62 is housed in the circular hole 16a. ing. C62 is a cord connected to the upper heater 62. As shown in FIGS. 4b and 11, non-penetrating type screw holes Hb, Hb, and Hb are formed in the bottom surface of the thick portion 16b. Further, a glue temperature sensor 60 penetrates the right side surface 16 slightly above the thick portion 16b of the right side surface 16 and is fixedly projected in the space R1 inside the tank body T. Reference numeral 60a in FIGS. 1 and 2 denotes a heat resistant packing. C60 is a cord covering the information cable 60a shown in FIG.

  The upper surface 11 of the upper part 1 is a complete open surface. Further, the lower surface 12 of the upper portion 1 is basically an open surface as shown in FIG. 4 b, but a raised portion 17 is provided in the center from the front surface 13 to the rear surface 14, and is further orthogonal to the raised portion 17. Four ribs 18a, 18b, 18c, and 18d are provided, and a bottom portion U is formed by the raised portion 17, the ribs 18a, 18b, 18c, and 18d, and a convex portion 19 described later. Therefore, portions other than the bottom U are divided open surfaces P1 to P6 (see FIG. 4a).

  The raised portion 17 has a substantially triangular cross section, the front surface is fixed integrally with the front surface 13 of the upper portion 1, the rear surface is fixed integrally with the rear surface 14 of the upper portion 1, and a circular hole 17a is formed slightly below the center. A raised heater 63 is housed in the circular hole 17a. C 63 is a cord connected to the upper heater 63. The circular hole 17 a is provided so as to penetrate from the front surface 13 of the upper portion 1 to the raised portion 17 and the rear surface 14.

  The four ribs 18 a, 18 b, 18 c, and 18 d have a substantially triangular cross section and are slightly lower in height than the raised portion 17. The rib 18 a has a left side surface fixed integrally with the left side surface 15 of the upper portion 1 and a right side surface fixed integrally with the raised portion 17. The height of the rib 18a is gradually increased at the portion where the rib 18a is fixed to the left side surface 15 of the upper portion 1. This is a consideration from the viewpoint of strength. The rib 18 b is located behind the rib 18 a, and the left side surface is integrally fixed to the left side surface 15 of the upper portion 1 and the right side surface is integrally fixed to the raised portion 17. The height of the rib 18b is gradually increased at the portion fixed to the left side surface 15 of the upper portion 1. This is also a consideration from the viewpoint of strength.

  The rib 18 c has a left side surface fixed integrally with the raised portion 17 and a right side surface fixed integrally with the right side surface 16 of the upper portion 1. The height of the rib 18c is gradually increased at the portion where the rib 18c is fixed to the right side surface 16 of the upper portion 1. This is a consideration from the viewpoint of strength. The rib 18 d is located behind the rib 18 c, and the left side surface is integrally fixed to the raised portion 17 and the right side surface is integrally fixed to the right side surface 16 of the upper portion 1. The height of the rib 18d is gradually increased at the portion fixed to the right side surface 16 of the upper portion 1. This is also a consideration from the viewpoint of strength.

  Further, at the center of the bottom surface of the raised portion 17, as shown in FIGS. 1, 4 b, 5 a, and 5 b, a conical convex portion 19 is fixed integrally with the raised portion 17 and protrudes downward. As shown in FIG. 1, the convex portion 19 may be formed as a single unit with the raised portion 17, but if there is a difficulty in molding, it is formed as a separate member and later is You may adhere to the upper part 17 by methods, such as screwing and welding.

As described above, the upper surface 17, the ribs 18 a, 18 b, 18 c, 18 d, and the convex portion 19 are provided on the lower surface 21 of the upper portion of the tank body T, and these configurations form the bottom U, and the above-described configuration depends on these configurations. As shown in FIGS. 4a and 4b, six substantially rectangular open surfaces P1, P2, P3, P4, P5, and P6 are formed.

  The lower part 2 of the tank body T is generally bowl-shaped as shown in FIGS. 7a, 7b, 10a, and 10b, and the plan view is substantially square as seen in FIG. 5a, and the upper surface 21 is an open surface. The bottom surface 22 is closed to form a cylindrical convex portion 22a in which the lower surface central portion of the bottom surface 22 projects downward, and the nipple 42 (see FIG. 8) of the hose 4 is screwed into the center of the convex portion 22a. A glue supply hole 22b, which is a screw hole, is formed.

  A front surface 23 of the lower portion 2 of the tank body T is substantially rectangular, and a lower end portion is integrally continuous with the front portion of the bottom surface 22. The back surface 24 of the lower part 2 is also substantially rectangular, and the lower end portion thereof is continuous with the back surface portion of the bottom surface 22 as a unit. Further, the left side surface 25 of the lower part 2 continues to the bottom surface 22 while being gently curved, and the right side surface 26 is also continued to the bottom surface 22 while being gently curved.

  As shown in the longitudinal sectional views of FIGS. 1 and 2, the lower portion 2 has a thick portion 25b where the left side surface 25 continues to the bottom surface 22 and a circular hole 25a in the portion that contacts the bottom surface 22 of the thick portion 25b. The lower heater 64 is stored in the circular hole 25a. The circular hole 25 a is drilled through from the front surface 23 to the back surface 24. Note that C64 shown in FIGS. 10a and 10b is a cord connected to the heater 64.

  As shown in the longitudinal sectional views of FIGS. 1 and 2, the lower portion 2 has a portion where the right side surface 26 continues to the bottom surface 22 as a thick portion 26b, and a circular hole 26a in a portion contacting the bottom surface 22 of the thick portion 26b. The lower heater 65 is stored in the circular hole 26a. The circular hole 26 a is drilled through from the front surface 23 to the back surface 24. In addition, C65 seen in FIGS. 10 a and 10 b is a cord connected to the heater 65.

  A flange 23 a that protrudes in the front direction is provided integrally with the front surface 23 at the upper end portion of the front surface 23 of the lower part 2, and a flange 24 a that protrudes in the rear direction is provided integrally with the rear surface 24 at the upper end portion of the back surface 24. A flange 25c protruding leftward is provided integrally with the left side 25 at the upper end of the left side 25, and a flange 26c protruding rightward is integrally formed with the right side 26 at the upper end of the right side 26. The flanges 23a, 24a, 25c, and 26c are integrally formed in an annular shape. Further, the flanges 23a, 24a, 25c, and 26c are formed with screw holes Hc that are through-holes at three locations on each flange.

  Plate-like ribs 27a, 27b, 27c, and 27d are formed on the inner side of the bowl-like shape of the lower portion 2 in a raised manner. The rib 27a is formed integrally with the front surface 23, the left side surface 25, and the bottom surface 22 from the corner portion where the front surface 23 and the left side surface 25 contact toward the center, and the rib 27b is formed from the corner portion where the front surface 23 and the right side surface 26 contact each other. The ribs 27c are integrally formed with the back surface 24, the right side surface 26, and the bottom surface 22 from the corners where the right surface 26 and the back surface 24 contact toward the center. The ribs 27d are integrally formed with the back surface 24, the left side surface 25, and the bottom surface 22 from the corners where the back surface 24 and the left side surface 25 are in contact toward the center. The ribs 27a and 27d are configured to transmit the heat of the lower heater 64 stored in the thick part 25b to the space R2 inside the lower part 2, and the ribs 27b and 27c are the lower heater stored in the thick part 26b. This is a configuration for transferring 65 heat to the space R <b> 2 inside the lower part 2.

  As shown in FIG. 2, the upper surface of the bottom surface 22 of the lower portion 2 has a funnel-shaped recess 22c at the center, and the paste supply hole 22b is formed at the center of the recess 22c. Further, the upper side of the concave portion 22c is a step portion 22d, and a disc-shaped foreign matter capturing mesh 22e is fitted to the step portion 22d.

  As shown in FIG. 10 b, a columnar leg 28 a protrudes integrally with the front surface 23 and the left side surface 25 outside the portion where the front surface 23 and the left side surface 25 of the lower part 2 are joined. A screw hole Hd for fixing the entire tank body T to a floor or a base (not shown) is formed in the lower surface of the leg 28a. As shown in FIG. 10 b, a columnar leg 28 b is projected integrally with the front surface 23 and the right side surface 26 on the outside of the portion where the front surface 23 and the right side surface 26 are joined. A screw hole Hd for fixing the entire tank body T to a floor or a base (not shown) is formed in the lower surface of the leg 28b.

  As shown in FIG. 10 b, a columnar leg 28 c is provided so as to protrude integrally with the back surface 24 and the right side surface 26 outside the portion where the back surface 24 and the right side surface 26 of the lower part 2 are joined. A screw hole Hd for fixing the entire tank body T to a floor or a base (not shown) is formed in the lower surface of the leg 28c. As shown in FIG. 10 b, a columnar leg 28 d protrudes integrally with the back surface 24 and the left side surface 25 outside the portion where the back surface 24 and the left side surface 25 are joined. A screw hole Hd for fixing the entire tank body T to a floor or a base (not shown) is formed in the lower surface of the leg 28d.

    FIG. 11 shows an assembled structure of the upper part 1 and the lower part 2 of the tank body T. The upper part 1 and the lower part 2 are assembled with a heat-resistant packing P interposed therebetween. Screw holes Ha, Ha, Ha of the upper flange 13a are screw holes Hc, Hc, Hc of the lower flange 23a, and screw holes Ha, Ha, Ha of the upper flange 14a are screws of the lower flange 24a. The holes Hc, Hc, Hc are respectively assembled by bolts B and nuts N, and the screw holes Hb, Hb, Hb of the thick part 15b of the upper part 1 are screw holes Hc, Hc, Hc of the flange 25c of the lower part 2 (FIG. 10a), the screw holes Hb, Hb, Hb (see FIG. 11) of the thick part 16b of the upper part 1 are assembled to the screw holes Hc, Hc, Hc of the flange 26c of the lower part 2 by bolts B, respectively. The upper part 1 and the lower part 2 form a tank body T as a unit through a heat-resistant packing P. The state where this assembly is completed is shown in FIGS. In the state in which the upper part 1 and the lower part 2 are assembled, the convex part 19 of the upper part 1 protrudes downward and is positioned at the center of the space R2 of the lower part 2. The heat of the upper heater 63 is also distributed to the space R2 in the lower part 2.

Next, details of the upper heaters 61 and 62 stored in the upper part 1, the upper heater 63 stored in the upper part 17, and the lower heaters 64 and 65 stored in the lower part 2 will be described. In FIG. 2, the shortest distance from the upper heater 61 housed in the circular hole 15a of the thick portion 15b of the left side surface 15 of the upper portion 1 to the inner surface of the left side surface 15 is d1, and the thickness of the right side surface 16 of the upper portion 1 is If the shortest distance from the upper heater 62 stored in the circular hole 16a of the thick part 16b to the inner surface of the right side surface 16 is d2,
It is configured so that d1 = d2.

Further, the shortest distance from the lower heater 64 stored in the circular hole 25a of the thick part 25b of the lower part 2 to the inner surface of the thick part 25b is stored in d4, and the circular hole 26a of the thick part 26b of the lower part 2 is stored. If the shortest distance from the lower heater 65 to the inner surface of the thick portion 26b is d5,
d4 = d5.
Furthermore, if the shortest distance from the top heater 17 stored in the top top 17 to the surface of the top 17 is d3,
d4 (d5) ≦ d1 (d2) <d3
It is comprised so that.

In the tank body T of Example 1, as shown in FIG. 2, d4 and d5 are the shortest, d1 and d2 are slightly longer than d4 and d5, and d3 is nearly twice as long as d4 and d5. . More specifically, when the size of the upper surface 11 of the upper part 1 is a tank body T having a size of about 250 mm × 250 mm by an external method, d1 to d5 are set to be substantially the following numerical values, respectively.
d1 = d2 = about 7.5 mm d3 = about 10 mm d4 = d5 = about 6.5 mm

The reason for setting as described above is as follows. That is, the upper heater 63 stored in the upper portion 17 distributes heat to the upper portion 17, the ribs 18 a to 18 d, and the convex portion 19, and the lower central portion and the lower portion of the space R <b> 1 inside the upper portion 1. Heat must be distributed to the central part of the internal space R2. Therefore, the temperature setting of the upper heater 63 is considerably higher than that of the upper heaters 61 and 62 and the lower heaters 64 and 65. At this time, the upper heater 63 is stored in a shallow portion of the upper heater 17. In other words, if the distance d3 is small, before the heat is distributed to the raised portion 17, the ribs 18 a to 18 d and the convex portion 19, the heat passes through the meat of the raised portion 17 near the raised portion heater 63 and the surface of the raised portion 17. And only that part is overheated, and the paste begins to deteriorate. Furthermore, the other portions of the raised portion 17 where heat is not sufficiently distributed, the ribs 18a to 18d, and the convex portion 19 do not reach the required temperature, and the glue temperature at that portion decreases, the viscosity increases, and the flow becomes difficult. . In order to prevent such a situation, the shortest distance d3 is set larger than the shortest distances d1, d2, d4, and d5, the temperature setting of the raised heater 63 is increased, and the raised portion 17, the ribs 18a to 18d, and the convex portion It was constructed so that heat could be evenly distributed to 19.

In the first embodiment, the reason why the shortest distances d1 and d2 are slightly larger than the shortest distances d4 and d5 is as follows. That is, the upper heaters 61 and 62 must supply heat to a wider space than the lower heaters 64 and 65. More specifically, the upper heaters 61 and 62 need to supply heat to the lower portion of the space R1 in the upper portion 1 through the ribs 18a to 18d, but the space R2 in which the lower heaters 64 and 65 need to supply heat is required. It is narrower than the lower part of the space R1. Therefore, in the same manner as the upper heater 63, the temperature setting of the upper heaters 61 and 62 is slightly higher than the temperature setting of the lower heaters 64 and 65, and the shortest distances d1 and d2 are slightly higher than the shortest distances d4 and d5. The above purpose can be achieved by increasing the size.

Thus, the temperature setting of the heater and the shortest distance from the heater to the surface have a deep correlation. The heater temperature can be set in any way later, but once the shortest distance from the heater to the surface is designed, it cannot be changed after the product is completed. Therefore, the distances d1 to d5 to the surfaces of the upper heaters 61 and 62, the upper and lower heaters 63 and 64 and 65 are set to the above values based on the principle of heat distribution as described above, and the heater temperature is thereafter set. The lower part of the space R1 and the space R2 are designed to be uniformly heated at substantially the same temperature. The temperature setting for each heater will be described in detail later.

Next, the configuration of the suction pump 3 and the hose 4 will be described. As shown in FIG. 8, the suction pump 3 has an upper end of the nipple 32 screwed and fixed to the glue supply port 22 b of the lower part 2 of the tank body T, and the body 31 of the suction pump 3 is connected to the motor M. Thus, the main body 31 is operated by the rotational force of the motor M, and the glue G is sucked from the glue supply port 22b and sent to the hose 4. A pump heater 66 that is a belt-shaped cover heater is wound around the main body 31 and plays a role of heating so that the temperature of the glue G passing through the suction pump 3 does not decrease. A heater temperature sensor 66 c that can directly measure the temperature of the heater 66 is enclosed in the heater 66.

A nipple 42 of the hose 4 is connected to the lower part of the suction pump 3, and the glue sucked by the suction pump 3 passes through the nipple 42 and is sent to the main body 41 of the hose 4. The main body 41 of the hose 4 is a flexible hose, and the outer side is double-coated with coating materials 41a and 41b, and a cap 67a is attached to a connection portion with the nipple 42. A hose heater 67, which is a coiled cord heater, is wound around the heat resistant / insulating layer 41c inside the covering materials 41a, 41b, and an inner tube 41d is provided inside the heat resistant / insulating layer 41c. The glue G heated inside flows and is supplied to a gluing device (not shown) of the bookbinding machine. A heater temperature sensor 67c capable of directly measuring the temperature of the hose heater 67 is enclosed in the cap 67a.

Next, the configuration of the upper heaters 61 and 62, the upper heater 63, the lower heaters 64 and 65, the pump heater 66, and the hose heater 67 will be described. In FIG. 12, the upper heaters 61, 63, and 62 are illustrated in order from the top. This is because the upper heater 63 is located between the upper heaters 61 and 62. The upper heater 61 is a cylindrical cartridge type heater. As schematically shown in FIG. 12, a heating element 61b and a heater temperature sensor 61c are housed in a sleeve 61a. A power cord 61d is extended from the heating element 61b, and an information cable 61e for information transmission is extended from the heater temperature sensor 61c. In FIGS. 1 to 11, the power cord 61d and the information cable 61e are covered together. And represented as one code C61.

The upper heater 62 is also a cylindrical cartridge type heater similar to the upper heater 61. As schematically shown in FIG. 12, a heating element 62b and a heater temperature sensor 62c are housed in a sleeve 62a. A power cord 62d is extended from the heating element 62b and an information cable 62e for information transmission is extended from the heater temperature sensor 62c. In FIGS. 1 to 11, the power cord 62d and the information cable 62e are covered together. This is expressed as one code C62.

The upper heater 63 is also a cylindrical cartridge type heater similar to the upper heaters 61 and 62, and as shown schematically in FIG. 12, a heating element 63b and a heater temperature sensor 63c are housed inside the sleeve 63a. A power cord 63d extends from the heating element 63b, and an information cable 63e for information transmission extends from the heater temperature sensor 63c. In FIGS. 1 to 11, the power cord 63d and the information cable 63e are covered together. This is expressed as one code C63.

Similarly, the lower heater 64 is a cylindrical cartridge type heater, and a heating element 64b and a heater temperature sensor 64c are housed in a sleeve 64a as schematically shown in FIG. A power cord 64d is extended from the heating element 64b and an information cable 64e for information transmission is extended from the heater temperature sensor 64c. In FIGS. 1 to 11, the power cord 64d and the information cable 64e are covered together. And represented as one code C64.

Similarly, the lower heater 65 is a cylindrical cartridge type heater, and as schematically shown in FIG. 12, a heating element 65b and a heater temperature sensor 65c are housed in a sleeve 65a. A power cord 65d is extended from the heating element 65b and an information cable 65e for information transmission is extended from the heater temperature sensor 65c. In FIGS. 1 to 11, the power cord 65d and the information cable 65e are covered together. And represented as one code C65. Reference numeral 60 denotes a glue temperature sensor, and an information cable 60 a for information transmission is extended from the glue temperature sensor 60. The information cable 60a is represented as a code C60 in a covered state in FIG.

The pump heater 66 is a belt-like cover heater as described above, and is used by being wound around the main body 31 of the pump 3 (see FIG. 8). As schematically shown in FIG. 12, a belt-like heating element 66b is enclosed inside a cover 66a, and a heater temperature sensor 66c is stored in contact with the heating element 66b. A power cord 66d is extended from the heating element 66b, and an information cable 66e for information transmission is extended from the heater temperature sensor 66c. In FIGS. 1 to 11, the power cord 66d and the information cable 66e are covered together. This is expressed as one code C66.

As schematically shown in FIG. 12, the heater 67b is a cord heater wound in a coil shape. As shown in FIG. 8, the glue in the inner tube 41d is interposed via the heat-resistant / insulating layer 41c. G (not shown in FIG. 8) is heated. A cap 67a is provided adjacent to the nipple 42, and a heater temperature sensor 67c capable of directly measuring the temperature of the heating element 67b of the heater 67 is stored in the cap 67a. As shown in FIG. 12, a power cord 67d is extended from the heating element 67b, and an information cable 67e for information transmission is extended from the heater temperature sensor 67c. However, in FIGS. The information cable 67e is covered together and represented as one code C67.

As shown in FIG. 8, the control device 5 is installed adjacent to the tank body T, and is based on the temperature information of the glue temperature sensor 60, the upper heaters 61 and 62, the upper heater 63, and the lower heaters 64 and 65. The operation of each of the upper heaters 61 and 62, the upper heater 63, and the lower heaters 64 and 65 is controlled, the pump heater 66 is controlled based on the temperature information of the pump heater 66, and the hose heater 67 is controlled. The hose heater 67 is controlled based on the temperature information. FIG. 12 schematically shows a specific system configuration of the paste temperature sensor 60, the upper heaters 61 and 62, the upper heater 63, the lower heaters 64 and 65, and the pump heater 66 and the hose heater 67.

As shown in FIG. 12, the control device 5 includes a control unit 51 and a power supply unit 52, and further includes temperature regulators 61f to 67f, relays 61g to 67g, and 61h to 65h. That is, the glue temperature sensor 60 of the tank main body T is connected to the control unit 51 via the information cable 60a, and the heating element 61b of the upper heater 61 of the tank main body T is connected to the power supply unit via the power cord 61d, the relay 61g, and the relay 61h. 52, the relay 61h is connected to the control unit 51 via the information cable 61i, and the heater temperature sensor 61c of the upper heater 61 is connected to the relay 61g via the information cable 61e and the temperature regulator 61f. The heating element 62b of the upper heater 62 of the tank body T is connected to the power supply unit 52 through a power cord 62d, a relay 62g, and a relay 62h, and the relay 62h is connected to the control unit 51 through an information cable 62i. A heater temperature sensor 62c of the heater 62 is connected to a relay 62g via an information cable 62e and a temperature control device 62f.

Further, the heating element 63b of the climax heater 63 of the tank body T is connected to the power supply unit 52 via a power cord 63d, a relay 63g, and a relay 63h, and the relay 63h is connected to the control unit 51 via an information cable 63i. A heater temperature sensor 63c of the upper heater 63 is connected to a relay 63g via an information cable 63e and a temperature regulator 63f. Further, the heating element 64b of the lower heater 64 of the tank body T is connected to the power supply unit 52 via a power cord 64d, a relay 64g, and a relay 64h, and the relay 64h is connected to the control unit 51 via an information cable 64i. The heater temperature sensor 64c of the heater 64 is connected to the relay 64g via the information cable 64e and the temperature regulator 64f, and the heating element 65b of the lower heater 65 is connected to the power supply unit 52 via the power cord 65d, the relay 65g, and the relay 65h. The relay 65h is connected to the controller 51 via an information cable 65i, and the heater temperature sensor 65c of the lower heater 65 is connected to the relay 65g via an information cable 65e and a temperature regulator 65f.

The heating element 66b of the pump heater 66 of the suction pump 3 is connected to the power supply unit 52 via a power cord 66d and a relay 66g. The heater temperature sensor 66c of the pump heater 66 includes an information cable 66e and a temperature regulator 66f. The heater 67b of the hose heater 67 is connected to the power supply section 52 via the relay 67g, the heater temperature sensor 67c of the pump heater 67 is connected to the information cable 67e, and the temperature regulator. It is connected to the relay 67g via 67f. Reference numeral 53 denotes an external power cord, and reference numeral 54 denotes a power cord for supplying power from the power supply unit 52 to the control unit 51.

FIG. 13 shows an example of the temperature setting of the glue temperature sensor 60 and the upper heaters 61 and 62, the upper heater 63, the lower heaters 64 and 65, the pump heater 66 and the hose heater 67, and the neighboring glue temperature or the inside in that case The actual measured value of paste temperature is shown. In the example shown in FIG. 13, the upper limit temperature of the glue temperature sensor 60 is 150 ° C., the lower limit temperature is 145 ° C., the upper limit temperature of the upper heaters 61 and 62 is 220 ° C., the lower limit temperature is 215 ° C., and the upper limit temperature of the upper heater 63 is set. 260 ° C, lower limit temperature is 255 ° C, upper limit temperature of lower heaters 64 and 65 is 210 ° C, lower limit temperature is 205 ° C, upper limit temperature of pump heater 66 is 240 ° C, lower limit temperature is 235 ° C, upper limit of hose heater 67 The temperature is set to 160 ° C and the lower limit temperature is set to 155 ° C.

In this case, if the adhesive temperature in the vicinity of each heater is measured, the adhesive temperature in the vicinity N1, N2 of the upper heaters 61, 62 is 160 ° C, the adhesive temperature in the vicinity N3 of the upper heater 63 is 150 ° C, and the lower heaters 64, 65 are used. The glue temperature in the vicinity N4 and N5 was 165 ° C., the glue temperature in the inner N6 of the pump heater 66 was 140 ° C., and the glue temperature in the inner N7 of the hose heater 67 was 150 ° C. Alternatively, it may be said that the upper limit temperature and the lower limit temperature of each heater are set so that the adjacent paste temperature and the internal paste temperature have the values shown in FIG.

That is, the upper limit temperature and the lower limit temperature of each heater are set so that the paste temperature in the tank body T is about 160 ° C. This may be considered as the limit temperature at which the paste starts to deteriorate when the temperature is higher than this. On the other hand, the paste temperature inside the pump 3 or the hose 4 may be slightly lowered. This is because it is necessary to completely dissolve the solid glue inside the tank body T, so the glue temperature is set slightly higher. However, since the melted glue flows inside the pump 3 or the hose 4, the deterioration is deteriorated. Set the glue temperature slightly lower from the standpoint of prevention. In the pump 3, the internal paste temperature is lower than the internal paste temperature of the hose 4, but this is also set from the viewpoint of protecting the internal mechanism of the pump 3. Since the time for the glue G to flow through the pump 3 is extremely short, there is no fear of causing trouble even if it is set low.

The difference between the upper limit temperature and the lower limit temperature of the upper heaters 61 and 62, the upper heater 63, and the lower heaters 64 and 65 is substantially the depth in which these heaters are stored, that is, the difference between the distances d1 to d5 in FIG. Is due to. In other words, the heater having a larger distance d1 to d5 has a higher set temperature, so that the upper part heater 63 has a particularly large distance d3, so that the set temperature is considerably increased. Even so, the temperature of the paste in the vicinity is as low as 150 ° C. However, if heated to such a degree, the paste G will have sufficient fluidity, so that there will be no hindrance to the flow of the paste G.

The temperature setting described above is merely an example in the first embodiment, but the temperature range of the glue G is determined from the viewpoint of preventing the upper temperature Gα from being deteriorated (that is, the deterioration starts when the temperature is too high), Since the lower limit temperature Gβ is determined from the viewpoint of lowering the viscosity of the paste (that is, it becomes hard when the temperature is too low), the range is not so wide as long as the paste G used is an EVA hot melt adhesive, and the upper limit temperature Gα will be at most about 170 ° C., and the lower limit temperature Gβ will be at most about 130 ° C.

Next, the paste temperature control method in the control device 5 will be described in detail. First, the paste temperature control method in the tank body T is as follows. That is, until the temperature of the glue G reaches the preset upper limit temperature of the glue temperature sensor 60, the upper heaters 61 and 62, the upper heater 63, and the lower heaters 64 and 65 are in advance of the heater temperature sensors 61c to 65c. After the first step S1 that operates under the control of the set upper limit temperatures 61α to 65α and the lower limit temperatures 61β to 65β, and the temperature of the glue G reaches the preset upper limit temperature of the glue temperature sensor 60, the upper heater 61, 62, upper heater 63, lower heaters 64, 65 are upper limit temperature Gα, lower limit temperature Gβ set in advance of glue temperature sensor 60, and upper limit temperatures 61α-65α and lower limit temperatures 61β- of heater temperature sensors 61c-65c. It is divided into the second step S2 which is controlled and operated by four members of 65β.

In the auxiliary glue tank PT of the first embodiment, there are five heaters, upper heaters 61 and 62, upper heater 63 and lower heaters 64 and 65. As shown in FIGS. 62 is symmetrically provided, and the lower heaters 64 and 65 are also symmetrically provided. Therefore, for the sake of simplification of description, the function of the upper heaters 61 and 62 will be represented by the upper heater 61 and the function of the lower heaters 64 and 65 will be represented by the lower heater 64.

First, the control method of the upper heater 61 will be described with reference to the flowchart of FIG. In step S1, the upper heater 61 is turned on (operating state) (S11). At this time, as a matter of course, the remaining upper heater 62, the upper heater 63, and the lower heaters 64 and 65 are simultaneously turned on. Then, the temperature of the heater 61 rises (S12). The temperature rise of the upper heater 61 is sequentially measured by the heater temperature sensor 61c, and the temperature information is transmitted to the control device 5 through the information cable 61e (see FIG. 12). In this case, as a matter of course, the amount of the glue G in the tank T must be kept so that the glue upper surface line GL is always higher than the position of the glue temperature sensor 60 as shown in FIG. Don't be. In other words, it is necessary that the tip of the paste temperature sensor 60 is always sufficiently immersed in the paste G.

Therefore, the paste temperature sensor 60 constantly monitors the paste temperature in the tank body T, and the temperature information from the paste temperature sensor 60 is sequentially transmitted to the control device 5 via the information cable 60a. If the glue temperature sensor 60 reaches the preset upper limit temperature in step S13, the process proceeds to step S21 in step S2. If the temperature of the heater 61 reaches the preset upper limit temperature before the glue temperature sensor 60 reaches the preset upper limit temperature (S14), the information is sent to the temperature regulator 61f in the control device 5 through the information cable 61e. And a signal for turning off the heater 61 by the temperature regulator 61f (non-operating state) is transmitted to the relay 61g (S15). Since the relay 61g is in the middle of the power cord 61d and turns off the power cord 61d, the temperature of the upper heater 61 falls (S16).

The heater temperature sensor 61c constantly monitors the temperature of the upper heater 61. When the temperature of the heater 61 reaches a preset lower limit temperature (S17), the temperature information is sent to the temperature regulator in the control device 5 through the information cable 61e. 61f is transmitted, and a signal for turning on (operating) the heater 61 by the temperature regulator 61f is transmitted to the relay 61g, and the upper heater 61 is turned on (return to S11). The above steps are repeated until the glue temperature sensor 60 reaches a preset upper limit temperature.

  When the glue temperature sensor 60 reaches the preset upper limit temperature in step S13, the process proceeds to step S2, and the upper heater 61 is turned off (S21). That is, information that the glue temperature sensor 60 has reached a preset upper limit temperature is transmitted to the control unit 51 of the control device 5 via the information cable 60a, and the control unit 51 receives a circuit via the information cable 61i. A signal for turning off (the power cord 61d) is transmitted to the relay 61h, and the relay 61h turns off the circuit (inactive state).

Then, the temperature of the upper heater 61 falls (S22). In step S2, the upper heater 61 is not turned on until the glue temperature sensor 60 reaches a preset lower limit temperature. That is, the control unit 51 is not turned on unless the glue temperature sensor 60 sends information indicating that the glue temperature sensor 60 has reached the preset lower limit temperature to the relay 61h. That is, even if information that the temperature of the upper heater 61 has reached the preset lower limit temperature of the upper heater 61 is transmitted from the temperature regulator 61f to the relay 61g and the relay 61g is turned on, the glue temperature sensor 60 is not turned on. Since the relay 61h is not turned on unless the preset lower limit temperature is reached, the circuit (power cord 61d) remains off and the temperature of the upper heater 61 continues to fall (S22).

  When the temperature of the upper heater 61 is decreasing and the glue temperature sensor 60 reaches a preset lower limit temperature (S23), the relay 61h is activated and the upper heater 61 is turned on (S24). Then, the temperature of the upper heater 61 rises again (S25). When the glue temperature sensor 60 reaches a preset upper limit temperature (S26), the upper heater 61 is turned off again (returns to S21). Even if the glue temperature sensor 60 does not reach the preset upper limit temperature, if the upper heater 61 reaches the preset upper limit temperature of the upper heater 61 itself (S27), the relay 61g is turned off and the upper temperature is exceeded. The heater 61 is turned off (return to S21). In step S2, the above is repeated.

  The upper heater 62, the upper heater 63, and the lower heaters 64 and 65 are also controlled by the same program as described above. That is, in the flowchart of FIG. 16, by replacing the upper heater 61 with another heater, a method for controlling the other heater will be described. Accordingly, the temperature of the glue G is slowly increased at first in step S1 and gradually rises, and the temperature of the glue G (measured temperature of the glue temperature sensor 60) reaches a predetermined upper limit temperature. At this point, the process proceeds to step S2, and thereafter, the temperature of the glue G (measured temperature of the glue temperature sensor 60) repeats gentle up and down movements between a predetermined upper limit temperature and lower limit temperature of the glue temperature sensor 60. .

  The operating state of the upper heater 61 (62), the upper heater 63, the lower heater 64 (65) and the temperature of glue G (measured temperature of the glue temperature sensor 60), and the upper heater 61 (62), upper heater 63, lower FIG. 14 schematically shows changes in the temperature of the heater 64 (65), that is, the measured temperatures of the heater temperature sensors 61c (62c), 63c, and 64c (65c). Moreover, if the principal part of FIG.14 S2 is enlarged, it will become as FIG.

  14 and 15, the vertical axis represents temperature (° C.) and the horizontal axis represents time. At time T0, start with glue temperature τ ° C (room temperature). Since the heat of the upper heater 61 (62), the upper heater 63 and the lower heater 64 (65) is initially used exclusively for heating the tank body T, the upper heater 61 (62), the upper heater 63, the lower heater The temperature of the heater 64 (65) rises in a relatively slow graph. On the other hand, the temperature of the glue G rises in a more gentle curve.

In FIGS. 14 and 15, the operation of the upper heater 62 is represented by the upper heater 61, and the operation of the lower heater 65 is represented by the lower heater 64. The upper heaters 61 and 62 do not necessarily perform the same operation, but may be regarded as moving approximately in the same manner, and the relationship between the lower heaters 64 and 65 is the same.

  14 and 15, the temperature rise curves of the upper heater 61 (62), the upper heater 63, and the lower heater 64 (65) are not the same because the upper heater 61 (62), the upper heater 63, and the lower heater. This is due to the difference in the stored depth of 64 (65), that is, the difference between the distances d1 (d2), d3, and d4 (d5) in FIG. Since the distance d4 (d5) is the minimum, the temperature of the lower heater 64 (65) rises fastest, and then the temperature of the upper heater 61 (62) rises a little later. Since the distance d3 is the maximum, the temperature rise of the upper heater 63 is most delayed.

  Accordingly, it is the lower heater 64 (65) that first reaches its upper limit temperature 64α (65α, see FIG. 14). When the lower heater 64 (65) reaches its upper limit temperature 64α (65α), the lower heater 64 (65) is turned off, and the temperature of the lower heater 64 (65) decreases. When it reaches its lower limit temperature 64β (65β), it is turned on again, and the temperature of the lower heater 64 (65) rises. Next, it is the upper heater 61 (62) that reaches its own upper limit temperature 61α (62α), and the upper heater 61 (62) is turned off here, and its temperature drops. When it reaches 61β (62β), it is turned on again and its temperature rises. Finally, the upper heater 63 reaches its own upper limit temperature 63α and is turned off, the temperature drops, reaches its own lower limit temperature 63β and is turned on again.

  In this way, the upper heater 61 (62), the upper heater 63, and the lower heater 64 (65) have their upper limit temperatures 61α (62α), 63α, 64α (65α) and their lower limit temperatures 61β (61β), On / off is repeated under the control of 63β and 64β (65β), and during that time, the temperature of the glue G slowly rises at the beginning and slightly rises with time. The temperature increase curve of the glue G is finely influenced by the on / off of the upper heater 61 (62), the upper heater 63, and the lower heater 64 (65). It rises with a curve as shown schematically.

  Next, as shown in FIGS. 14 and 15, when the temperature of the glue G reaches the upper limit temperature Gα (time T1), that is, the temperature information of the glue temperature sensor 60 has reached the upper limit temperature Gα. When it is transmitted, the process proceeds to step S2, and the upper heater 63 and the lower heater 64 (65) whose temperature is increasing in the ON state do not reach their upper limit temperature 63α or 64α (65α). Forced off. However, the temperature of the upper heater 61 (62) whose temperature is decreasing in the off state is further decreased without any influence. Since all the five heaters of the upper heater 61 (62), the upper heater 63, and the lower heater 64 (65) are turned off and the temperature is lowered, the temperature of the glue G is also lowered slowly.

  After the time T1, the upper heater 61 (62), the upper heater 63, and the lower heater 64 (65) are at the temperature of the glue G, that is, the upper limit temperature Gα of the glue temperature sensor 60, even if they are on. It is turned off and turned on at the lower limit temperature Gβ of the glue temperature sensor 60. Even if it falls below its own lower limit temperature (61β, 62β, 63β, 64β, 65β), it does not turn on unless the temperature of the glue G reaches the lower limit temperature Gβ of the glue temperature sensor 60. Accordingly, the temperature of the paste G repeatedly increases and decreases slowly between the upper limit temperature Gα and the lower limit temperature Gβ. The interval between the upper limit temperature Gα and the lower limit temperature Gβ is 5 ° C. in the first embodiment.

  However, it is not true whether the curves drawn by the upper heater 61 (62), the upper heater 63, and the lower heater 64 (65) are repeated in exactly the same pattern, for example, the opening of the upper surface 11 of the upper portion 1 of the tank body T. When the normal temperature solid paste G is suddenly replenished from the section (see FIG. 8), naturally the curved pattern drawn by the upper heater 61 (62), the upper heater 63, and the lower heater 64 (65) changes. However, as a matter of course, the temperature curve drawn by the glue G is also slightly affected.

  Further, even if the change is not abrupt, if the temperature balance inside the tank body T is biased for some reason, the curves drawn by the upper heater 61 (62), the upper heater 63, and the lower heater 64 (65) are slightly increased accordingly. It may change. For example, in FIG. 15, at time T4, compared to the rising curve drawn by the upper heater 63 after the upper heater 61 (62), the upper heater 63, and the lower heater 64 (65) are all turned on at time T2. The rising curve drawn by the upper heater 63 after the upper heater 61 (62), the upper heater 63, and the lower heater 64 (65) are all turned on is somewhat gentle. For example, the case where the temperature rise of the buildup heater 63 is blunted due to a part of the glue G, the temperature of which does not rise so much from the top, has fallen at the buildup portion 17 is shown. In such a case, for example, when time T2 to T3 is compared with time T4 to T5, the curves drawn by the upper heater 61 (62), the upper heater 63, and the lower heater 64 (65) are not necessarily the same in both sections. In addition, the time period from T4 to T5 is slightly longer than the time period from T2 to T3. As described above, although various pattern developments are observed in detail in the temperature curve, the temperature of the glue G generally oscillates between the upper limit temperature Gα and the lower limit temperature Gβ with a substantially constant rhythm. The paste temperature is held between the upper limit temperature Gα and the lower limit temperature Gβ.

  Next, the operation of the pump heater 66 and the hose heater 67 will be described. In both cases, the simple operation is such that ON / OFF is repeated so that the temperature of the glue G inside is kept within a certain range. That is, the heater 66 for the pump and the heater 67 for the hose do not have the role of dissolving the glue G, but only have the role of holding the melted glue G within a certain temperature range. A simple setting of repeating ON / OFF between the upper limit temperature and the lower limit temperature is sufficient.

 Specifically, in the pump heater 66, when the temperature information indicated by the heater temperature sensor 66c reaches its upper limit temperature (see FIG. 12), information is transmitted from the temperature regulator 66f to the relay 66g to turn off the relay 66g. When the temperature information indicated by the heater temperature sensor 66c reaches its lower limit temperature, information is transmitted from the temperature regulator 66f to the relay 66g to turn on the relay 66g. Also in the hose heater 67, when the temperature information indicated by the heater temperature sensor 67c reaches its upper limit temperature, information is transmitted from the temperature regulator 67f to the relay 67g to turn off the relay 67g, and the temperature indicated by the heater temperature sensor 67c. When the information reaches its lower limit temperature, the information is transmitted from the temperature regulator 67f to the relay 67g to turn on the relay 67g. It operates by such simple control.

  The present invention performs strict temperature control by a simple control method in an auxiliary tank for glue that has been difficult to maintain at a certain temperature, that is, an auxiliary tank for glue for supplying glue to the glueing device of a bookbinding machine. A configuration of an auxiliary tank for glue and a glue temperature control method are provided. Therefore, in the auxiliary tank for glue, which has been prone to high temperatures so far, many improvements have been made in terms of quality control to prevent the deterioration of glue and energy saving in terms of power saving. It can be introduced at bookbinding and printing shops.

  The advantage of the present invention is that it has the effect of drastically reducing the occurrence of defective books in a bookbinding system. In other words, it has been possible to prevent the deterioration of glue that has been frequently caused by melting at a considerably high temperature so far by keeping the auxiliary tank for glue at the minimum necessary temperature, and is surely suitable for the glueing device of the bookbinding machine. It can supply temperature glue. If there are many defective books due to the deterioration of glue, not only will waste be increased, but it will also take time and manpower to inspect the finished product. However, this point is dramatically eliminated by the present invention, and the present invention is considered to be welcomed by many bookstores.

  Furthermore, it cannot be overlooked that it greatly contributes to power saving, that is, energy saving, in maintaining the auxiliary auxiliary tank for glue at the minimum necessary temperature. Although the government policy has just set out a large CO2 reduction target, the present invention can always minimize the power consumption by a simple control method. It provides technical content that matches. That is, both the effects of preventing glue degradation and energy saving are linked to each other, and these two large effects are produced simultaneously by a very simple control method.

  Although the present invention has such a remarkable effect, it does not use any complicated program or the like, optimizes the structure of the tank body and the structure of the pump and the hose, and further makes the tank by a very simple yet effective program. It has succeeded in creating the above effect by maximizing the advantages of the main unit configuration and pump and hose configuration, and it can be easily introduced even in small and medium bookbinding shops without feeling the cost burden on the left. Devices other than the auxiliary glue tank do not require any modification or adjustment, and can be used immediately after being incorporated into a conventional system.

  Actually, the effect of the auxiliary tank for glue of the present invention is most expected in small and medium bookbinding shops. In other words, at the small and medium-sized bookstores that are forced to produce a variety of products in small quantities due to the recent recession, it is already very economical if the high-temperature heater in the auxiliary glue tank has been operating from the start to the end as before. However, it cannot be said that the auxiliary tank for glue is switched off during the time when there is no work. This is because once the switch is turned off, it takes a considerable amount of time before the glue fluidizes again and the work can be performed. Moreover, if the switch is left on, the paste will become hot and the quality will deteriorate significantly.

  In such a field, the glue auxiliary tank that always keeps the glue temperature at an appropriate temperature, that is, sufficiently fluidized, but keeps the temperature around 160 ° C., which does not deteriorate the quality, is the most reasonable. The advent of an auxiliary tank for glue that has long been awaited in the industry, because it is a simple part and it can be implemented with a simple configuration and program, so it is inexpensive and can be easily installed without changing the other parts of the bookbinding system. Therefore, it is believed that the auxiliary tank for glue of the present invention can be a standard specification for auxiliary tanks for glue in the future.

DESCRIPTION OF SYMBOLS 1 Upper part 11 Upper surface 12 Lower surface 13 Front surface 13a Flange 14 Back surface 14a Flange 15 Left side surface 15a Circular hole 15b Thick part 16 Right side 16a Circular hole 16b Thick part 17 Embossed part 17a Circular hole 18a Rib 18b Rib 18c Rib 18d Rib 18d Rib Part 2 Lower part 21 Upper surface 22 Bottom 22a Convex part 22b Glue supply hole 22c Concave part 22d Step part 22e Mesh 23 Front face 23a Flange 24 Back face 24a Flange 25 Left side face 25a Circular hole 25b Thick part 25c Flange 26 Right side face 26a Thick hole 26b Thick hole 26b Part 26c Flange 27a Rib 27b Rib 27c Rib 27d Rib 28a Leg 28b Leg 28c Leg 28d Leg 3 Suction pump 31 Main body 32 Nipple 4 Hose 41 Main body 41a Covering material 41b Covering material 41c Heat-resistant / insulating layer 41d Inner Tube 42 Nipple 5 Control device 51 Control unit 52 Power supply unit 53 External power supply cord 54 Power supply cord 60 Glue temperature sensor 60a Information cable 61 Upper heater 61a Sleeve 61b Heating element 61c Heater temperature sensor 61d Power supply cord 61e Information cable 61f Temperature regulator 61g Relay 61h relay 61i information cable 61α upper limit temperature 61β lower limit temperature 62 upper heater 62a sleeve 62b heating element 62c heater temperature sensor 62d power cord 62e information cable 62f temperature regulator 62g relay 62h relay 62i information cable 62α upper limit temperature 62β lower limit temperature 63 63a Sleeve 63b Heating element 63c Heater temperature sensor 63d Power cord 63e Information cable 63f Temperature regulator 63g Relay 63h Relay -63i Information cable 63α Upper limit temperature 63β Lower limit temperature 64 Lower heater 64a Sleeve 64b Heating element 64c Heater temperature sensor 64d Power cord 64e Information cable 64f Temperature regulator 64g Relay 64h Relay 64i Information cable 64α Upper limit temperature 64β Lower limit temperature 65 Lower heater 65a Sleeve 65b Heating element 65c Heater temperature sensor 65d Power cord 65e Information cable 65f Temperature regulator 65g Relay 65h Relay 65i Information cable 65α Upper limit temperature 65β Lower limit temperature 66 Pump heater 66a Cover body 66b Heating element 66c Heater temperature sensor 66d Power cord 66e Information cable 66f Temperature regulator 66g Relay 67 Hose heater 67a Cap 67b Heating element 67c Heater temperature sensor 67d Code 6 e Cable 67f Temperature controller 67g Relay C60 code C61 code C62 code C63 code C64 code C65 code C66 code C67 code G Glue GL Top line GT Glue auxiliary tank Gα Upper limit temperature Gβ Lower limit temperature HS Heat insulation material Ha Screw hole Hb Screw hole Hc Screw hole Hd Screw hole M Near motor N1 Near N2 Near N3 Near N4 Near N5 Near P Heat-resistant packing P1 Open surface P2 Open surface P3 Open surface P4 Open surface P5 Open surface P6 Open surface R space R1 space R2 space S1 step S11 step S12 step S13 Step S14 Step S15 Step S16 Step S17 Step S2 Step S21 Step S22 Step S23 Step S24 Step S25 Step S26 Step S 7 Step T tank body T0 h T1 time T2 hours time T3 T4 h T5 h U bottom d1 shortest distance d2 shortest distance d3 shortest distance d4 shortest distance d5 shortest distance

Claims (9)

In the auxiliary tank for glue that supplies glue to the glueing device of the bookbinding machine,
The whole consists of a tank body, a suction pump and a hose,
The tank body is composed of an upper part and a lower part that are assembled together, and has an upper heater at the upper part and a lower heater at the lower part.
The upper part has an upper surface and a lower surface and a bottom part with a raised heater on a part of the lower part and a bottom part with ribs provided, and a convex part projecting downward on the lower surface of the bottom part is integrated with the upper part. It is configured so that the heat of the upper heater can be distributed to the lower part,
The lower part has an upper surface opened and a lower surface closed, and a glue supply hole is formed in the lower surface. A suction pump having a heater is connected to the glue supply hole, and a hose having a heater is connected to the suction pump. It is configured to supply glue to the gluing device of the bookbinding machine with a hose,
The tank body has a paste temperature sensor that detects the temperature of the paste inside the tank body.
An upper heater having a heater temperature sensor for detecting the heater temperature is stored in each of the thick portions at two or more of the lower end portion of the upper side wall of the tank body or the bottom portion near the side wall. Has been
A built-up heater having a heater temperature sensor for detecting a heater temperature is stored inside a built-up section provided at the bottom of the upper part of the tank body,
A rib is protruded integrally with the top from the top, and the heat of the top heater can be distributed to the entire bottom of the top of the tank body,
A lower heater having a heater temperature sensor for detecting a heater temperature is housed in each of the thick portions where two or more portions from the side surface to the bottom surface of the lower portion of the tank main body are thick portions.
A pump heater that incorporates a heater temperature sensor that detects the heater temperature in the suction pump connected to the lower glue supply hole is provided.
The hose connected to the suction pump is provided with a hose heater that incorporates a heater temperature sensor that detects the heater temperature.
The temperature information of the heater for the pump is controlled by controlling the operation of the upper heater, the upper heater, and the lower heater based on the temperature information of the glue temperature sensor and the upper heater, the upper heater, and the lower heater. A controller for controlling the heater for the pump based on the temperature information of the heater for the hose based on the temperature information of the heater for the hose is provided,
This is an auxiliary tank for glue. A glue temperature sensor is provided anywhere below the center of the tank body,
The upper heater, the upper heater, and the lower heater are cartridge type heaters, and the heater temperature sensor of each heater is provided inside or attached to each heater to control the temperature of each heater. It is configured to measure directly,
A pump heater is wound around a suction pump by a cover heater, and a heater temperature sensor is provided inside the cover heater so that the temperature of the cover heater can be directly measured.
A heater for a hose is wound around a hose with a cord heater, and a heater temperature sensor is provided attached to the cord heater so that the temperature of the cord heater can be directly measured.
The auxiliary tank for glue according to claim 1, wherein: The upper part of the tank body has a prismatic shape with a substantially square shape in plan view, and the upper heaters are respectively stored in the thick portions at the lower ends of the two side walls facing each other,
The upper part located in the center of the bottom of the upper part of the tank body has a substantially triangular cross section and extends parallel to the side wall in which the upper heater is stored. Stored parallel to the upper heater,
A rib having a substantially triangular cross section perpendicular to the upper portion is formed integrally with the upper portion, and the other end of the rib is integrally joined to the upper side wall of the tank body.
The lower part of the tank body has a substantially square shape whose upper surface can be integrally joined to the lower surface of the upper part of the tank body, the bottom surface of the lower part is bowl-like, and the bowl-like part is a thick part, and the thick part is opposed to the bottom part. The lower heater is stored in each position,
The auxiliary tank for glue according to claim 1 or claim 2, wherein Whether the shortest distance from the upper heater to the inner surface of the upper side wall where the upper heater is stored is equal to the shortest distance from the lower heater to the inner surface of the lower upper part where the lower heater is stored Is greater than
The shortest distance from the top heater to the surface of the top is greater than the shortest distance to the inner surface of the upper side wall in which the upper heater is stored,
The auxiliary tank for paste according to claim 3, wherein: In the auxiliary tank for glue according to any one of claims 1 to 4, each of the upper heater, the upper heater, and the lower heater,
A first step of controlling and operating at a preset upper limit temperature and lower limit temperature of each heater temperature sensor until the glue temperature reaches a preset upper limit temperature of the glue temperature sensor;
A second step of operating after the glue temperature reaches the preset upper limit temperature of the glue temperature sensor and is controlled by the preset upper limit temperature of the glue temperature sensor and the preset lower limit temperature of the glue temperature sensor;
Operated by controlled by,
The paste temperature control method characterized by the above-mentioned. In the first step, each of the upper heater, the upper heater, and the lower heater is
When the preset upper limit temperature of each heater temperature sensor is reached, it becomes inoperative,
When it reaches the preset lower limit temperature of each heater temperature sensor, it will be in the operating state.
Controlled to operate,
The paste temperature control method according to claim 5, wherein: In the second step, each of the upper heater, the upper heater, and the lower heater is
When the glue temperature sensor reaches the preset upper limit temperature, it becomes inactive,
When the glue temperature sensor reaches the preset lower limit temperature, it will be activated,
Even if the glue temperature sensor has not reached the preset upper limit temperature, each heater temperature sensor becomes non-operational when it reaches the preset upper limit temperature.
Controlled to operate,
The paste temperature control method according to claim 5 or 6, wherein the paste temperature is controlled. Pump heater and hose heater
When the preset upper limit temperature of each heater temperature sensor is reached, it becomes inoperative,
When it reaches the preset lower limit temperature of each heater temperature sensor, it will be in the operating state.
Controlled to operate,
The paste temperature control method according to claim 5, claim 6, or claim 7. In the upper heater, the upper heater, and the lower heater, the preset upper limit temperature of each heater is
The upper limit temperature of the upper heater is set higher than the upper limit temperature of the upper heater,
The upper limit temperature of the upper heater is set equal to or higher than the upper limit temperature of the lower heater,
The paste temperature control method according to claim 5, claim 6, claim 7, or claim 8.

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