JP4766899B2 - Hot melt supply device - Google Patents

Description

The present invention relates to a hot melt supply apparatus used for supplying a hot melt adhesive to a workpiece.

Hot melt supply device supplies a hot melt adhesive to the workpiece. When supplying hot melt adhesive to a workpiece, a conventional positioning operation device first positions the workpiece manually with respect to a table, and then adsorbs and fixes the workpiece placed on the table with a compressor. Next, the table is moved along a linear track, and the hot melt adhesion to the workpiece is measured by measuring the discharge start and end timing based on the ON / OFF of the discharge start switch and discharge end switch provided on this track. An agent is intermittently supplied quantitatively (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 7-155671 (2nd page [0011] to [0016])

  On the other hand, when a hot melt adhesive is supplied to a work such as a decorative compact case that needs to bond a plurality of cake dishes, the hot melt adhesive is supplied at a plurality of locations, and the supply amounts thereof are also different. As described above, when supplying hot melt adhesive to a plurality of parts arbitrarily arranged on a workpiece, depending on the arrangement of the supply parts, it is possible to provide a plurality of supply nozzles for supplying hot melt adhesive. It is necessary to let

  However, the above-described conventional device has the following problems when it is applied to a wide variety of products and a small lot work like a cosmetic compact case having a relatively short life cycle depending on the trend.

  First, in the conventional apparatus, since the work must be manually positioned with respect to the table at the start of the work, the work for supplying the work becomes complicated. In addition, since the conventional apparatus requires means for fixing the work to the table, when the form (shape) of the work changes greatly, it is necessary to change the fixing means to adapt to the form every time the work changes. . Furthermore, in the conventional apparatus, it is necessary to increase or decrease the number of supply nozzles depending on the arrangement of the parts for supplying the hot melt adhesive to the workpiece. That is, the conventional apparatus is not suitable when the work is of a wide variety and in a small lot because the equipment is large and it takes time to prepare and adjust the work accompanying the change of the work.

The present invention has been made based on the above-mentioned fact recognition, and the problem to be solved is to reduce the time required for preparations and setup adjustments associated with frequent workpiece changes without increasing the size of the equipment. Therefore, it is intended to provide a hot melt supply device corresponding to various types and small lots, and particularly to improve the complexity of work when supplying a substance such as a liquid material to a workpiece.

The hot melt supply apparatus according to the present invention is obtained by a workpiece introduction unit that introduces a workpiece to be processed, an image recognition unit that recognizes an image of the arrangement state of the workpiece sent from the workpiece introduction unit, and the image recognition unit. A hot melt supply unit that supplies hot melt adhesive to the workpiece based on the image information, a workpiece discharge unit that discharges the workpiece supplied with hot melt adhesive, and the image recognition using the workpiece introduction unit as an initial position. A supply unit that can move between
The supply unit includes an introduction port for introducing the workpiece into the image recognition unit, and a supply station having a rough surface on which the workpiece is placed and disposed below the introduction port, and the image recognition unit. The workpiece is dropped from the supply station in a brushed-down manner by moving to the opening and opening the inlet,
The image recognition unit is provided with a movable table which moves back and forth and left and right by placing the workpiece dropped from the supply unit, and an image recognizing image recognition means the arrangement of the workpiece placed on the movable table The movable table is provided with a mat made of a rubber material on which the work is placed and prevents the work from being displaced due to the movement of the movable table, and from the image recognition unit to the case discharge unit. To move and stop as appropriate between any of the steps up to
The hot melt supply unit, the said movable table is moved from the image recognition unit, a row of positioning of the said movable table based on the information by the image recognition unit is moved back and forth and left and right work Utotomoni, hot melt to the workpiece it is characterized in that the adhesive is a shall comprise a hot melt nozzles dispense.

In the present invention, the hot melt nozzle has a nozzle body and a nozzle tip, and includes a main chamber that houses the nozzle body and a sub chamber that is connected to the main chamber and surrounds the nozzle tip. It is preferable to provide a heat insulating cover including the cover main body . Furthermore, it is preferable that the heat insulating cover includes a heat insulating layer for surrounding the outer surface of the cover body in the circumferential direction to prevent heat radiation to the outside . In the present invention, the hot melt nozzle is a generic term for a nozzle that pours a heated melt, and “pour” refers to “dropping” by its own weight or “injection and discharge due to pressurization”. Is included.

Furthermore, the mat also Rukoto enhance crude to geometrically frictional resistance the surface may Rukoto enhance materially frictional resistance with high density material. For example, when the material is one that increases frictional resistance, a polymer organic material such as plastic, elastomer, fiber, etc. can be employed . However, the mat according to the present invention is made of a rubber material .

The present invention provides a movable table provided with a mat made of a rubber material, and a workpiece to be processed is placed on the mat, so that even if the workpiece is in an unstable form (shape), the movable table is moved. The workpiece does not shift relative to the movable table. In other words, according to the present invention, any type of workpiece can be placed on the movable table by simply placing it on the mat on the movable table without providing a separate means for fixing the workpiece to the movable table for each different workpiece. It can be easily positioned with respect to it.

Further, according to the present invention, the arrangement state of the work placed on the movable table is recognized as an image, and the hot melt adhesive is supplied to the work based on information obtained by the image recognition. That is, according to the present invention, the hot melt adhesive is continuously or intermittently supplied quantitatively to the supply portion on the workpiece without providing a switch or sensor for detecting the supply position for each different workpiece. Can be done.

Further, according to the present invention, the movable table is moved back and forth, left and right, the work is positioned, and a hot melt adhesive is supplied to the work. That is, according to the present invention, even when the arrangement of the supply portion is changed by changing the workpiece to a different workpiece, there is no need to newly increase / decrease the supply nozzle or the like in accordance with the change of the arrangement. There is no need to change the nozzle itself.

Therefore, according to the present invention, it is possible to reduce the time required for preparations and setup adjustments accompanying frequent work changes without increasing the size of the equipment. A hot melt supply apparatus can be provided. In addition, according to the present invention, the workpiece can be easily positioned with respect to the movable table simply by placing it on the mat on the movable table, and the hot melt adhesive can be supplied to the workpiece based on the image recognition. The complexity of the work when supplying the workpiece can also be improved.

In the present invention, the hot melt nozzle has a nozzle body and a nozzle tip, and includes a main chamber that houses the nozzle body and a sub chamber that is connected to the main chamber and surrounds the nozzle tip. It is preferable to include a heat insulating cover including the cover main body, and it is preferable that the heat insulating cover includes a heat insulating layer for surrounding the outer surface of the cover main body in the circumferential direction to prevent heat radiation to the outside . In this case, since the hot melt adhesive as a heated melt does not solidify even if it adheres to the spout, the heated melt splatters and pours due to the generation of fine solidified products that are likely to occur during the initial dispensing. It is possible to prevent the occurrence of misalignment of the ejection position and uneven dispensing. That is, according to such a configuration, since the occurrence of a defect rate due to the supply failure of the hot melt adhesive is reduced, it is effective in small-lot production that is easily affected by the defect rate.

Further, in the present invention, the mat that consisted of a rubber material, it is possible to manufacture simply and inexpensively a high frictional resistance mat, it is possible to reduce the cost of the entire device .

Further, the present invention is provided with a supply station supplies the workpiece to the movable table by the opening operation with a rough surface for mounting the workpiece. In this case, since the work can be mounted on the movable table in a brushed-down manner, image recognition can be performed without causing a large shift in the position and orientation of the work in the horizontal direction.

Hereinafter, a hot melt supply apparatus according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view schematically showing a hot melt supply apparatus 100 according to one embodiment of the present invention. FIG. 2 is a perspective view schematically showing the supply device 100. FIG.

  First, reference numeral 101 denotes a makeup compact case (hereinafter simply referred to as “case”) which is a work to be processed. The case 101 has a lid 101b attached to the case main body 101a via a hinge portion so as to be opened and closed. As shown in the figure, the case 101 is supplied to the device 100 of the present invention with the lid 101b opened in order to glue a cake dish filled with cosmetics such as a foundation to the case body 101a. .

  As shown in FIG. 1, the inventive device 100 includes a case introduction unit 110 for introducing a case 101 therein, an image recognition unit 120 for recognizing an arrangement state of the case 101 sent from the case introduction unit 110, The case includes a hot melt supply unit 130 that supplies hot melt adhesive to the case 101 based on image information obtained by the image recognition unit 120, and a case discharge unit 140 that discharges the case 101 supplied with hot melt adhesive. This is a so-called semi-automatic device in which human hands are involved in the introduction and discharge of 101.

  Reference numeral 1 denotes a movable table on which the case 101 is placed and moves in the front-rear direction D1 and the left-right direction D2 as shown in FIG. As shown in FIG. 1, the movable table 1 receives an instruction from the table controller 200 or a supply adjustment controller 400 described later, and appropriately moves and stops between an arbitrary period from the image recognition unit 120 to the case discharge unit 140. It has a table body 2. With this table body 2, the entire movable table 1 can move in the front-rear direction D1 and the left-right direction D2. The table controller 200 is provided in the case introduction unit 110, and a case supply completion signal from a first sensor that detects that the supply of the case 101 by the worker is completed, and the case 101 is taken out (discharged) by the worker. This is a controller that automatically steps the movement of the table body 2 in accordance with a case discharge completion signal from the second sensor that detects that the process has been completed.

Further, on the upper surface of the table main body 2, a mat 3 having a high frictional resistance for mounting the case 101 and preventing the displacement of the case 101 accompanying the movement of the table main body 2 is attached. Frictional resistance of the mat 3, Rukoto enhance crude to geometrically frictional resistance of the surface of the mat 3 can also be Rukoto enhance materially frictional resistance with high density material. For example, when the material is one that increases frictional resistance, a polymer organic material such as plastic, elastomer, fiber, etc. can be employed. However , the mat 3 according to this embodiment is made of a sponge-like foaming rubber material .

  The movable table 1 is arranged immediately below the image recognition unit 120 as shown in FIG. 1 in the initial stage when the device 100 of the present invention is not operating. Reference numeral 111 denotes a supply unit that can move between the image recognition unit 120 with the case introduction unit 110 as an initial position in accordance with a command from the table controller 200. The supply unit 111 includes an introduction port 112 for introducing the case 101 into the movable table 1 in the image recognition unit 120, and a supply station 113 for opening and closing the introduction port 112. This supply unit 111 is in the case introduction section 110 as shown in FIG. 1 at an initial stage when the apparatus 100 of the present invention has not started the supply operation. When the operator starts the supply of the hot melt adhesive, if the case 101 is placed on the rough surface 113f of the supply station 113, the supply unit 111 moves to the image recognition unit 120 (reference numeral D3 in FIG. 1). After that, the supply station 113 slides and the introduction port 112 opens, and the case 101 can be introduced onto the movable table 1 in a brushing manner. In FIG. 1, the supply station 113 and the movable table 1 are largely separated to facilitate the understanding of the invention. However, in practice, the supply station 113 and the movable table 1 are close to each other. It is not accompanied by a big fall. Further, in the case of the apparatus 100 of the present invention, since the supply operation involves a human hand, the opening / closing operation of the supply station 113 is performed by the operator himself / herself via the table controller 200 or the like in consideration of safety to the operator. Is preferably made based on

  The image recognizing unit 120 includes image recognizing means for recognizing the arrangement state of the case 101 placed on the movable table 1 in a brushed-down manner when the supply station 113 is opened. This image recognition means includes an illuminating device 121 that applies light to the case 101 on the mat 3 and an image camera 122 for capturing the arrangement state of the case 101 as an image. The image captured by the camera 122 is analyzed by the image recognition unit 300. That is, the image recognition means includes the lighting device 121, the image camera 122, and the image recognition unit 300, whereby the image recognition unit 120 can recognize the image of the arrangement state of the case 101 placed on the movable table 1. it can. Note that various means can be used as specific means for image recognition. For example, existing analysis means such as a blob, a caliper, and a search can be used.

  The hot melt supply unit 130 includes a desktop hot melt melting tank 131 fixed to the device 100 of the present invention, and a hot melt nozzle 60 fixed to the tank 131 and for pouring hot melt adhesive from the tank 131. The hot melt nozzle 60 is provided with a heat retaining cover 10 for keeping the tip of the hot melt nozzle 60 warm. The tank 131 and the hot melt nozzle 60 are controlled by the supply adjustment controller 400 that is bi-directionally communicated with the image recognition unit 300, and the timing and amount of extraction are controlled. Furthermore, the supply adjustment controller 400 controls the positioning of the case 101 with respect to the hot melt nozzle 60 by moving the movable table 1 in the front-rear direction D1 and the left-right direction D2, as shown in FIG. Do. That is, the melting tank 131, the hot melt nozzle 60, the heat retaining cover 101, and the supply adjustment controller 400 correspond to a liquid material supply unit that is an example of a work unit that performs work on a workpiece.

  Next, a specific operation of the device 100 of the present invention will be described with reference to the drawings.

  First, an operator roughly places the case 101 with the lid 101b open on the rough surface 113f of the supply station 113, and when the operator's hand leaves the case introduction unit 110, the supply unit 111 moves to the image recognition unit 120. Then, the introduction port 112 is opened by the movement of the supply station 113, and the case 101 is placed on the mat 3 of the movable table 1 that has been waiting just below the introduction port 112 in a brushed-down manner. Thereafter, the supply unit 111 returns to the initial position of the case introduction unit 110.

  In addition, when the case 101 is placed on the movable table 1, it is considered that the case 101 is slightly displaced from the initial position and orientation due to the reaction that the case 101 falls on the mat 3. 3 is made of a foam rubber material having a high frictional resistance, so that after the case 101 is placed, the position and orientation slightly shifted by the frictional resistance between the mat 3 and the case 101 are maintained, and then the position is further increased. Will not slip. In the image recognition unit 120, the image camera 122 recognizes an image of a minute shift in the arrangement state of the case 101 placed on the movable table 1. When actually performing image recognition, it is preferable to start image processing after taking a predetermined waiting time (for example, 0.5 sec) as the time from when the case 101 is placed on the mat 3 until it is stabilized. . In addition, about 100 types of workpieces are registered as target products in the image recognition unit 300, and the time required for the pre-processing associated with the change of the workpiece is about 2 minutes for one type.

  When the recognition of the arrangement state of the case 101 is completed in the image recognition unit 120, the movable table 1 further conveys the case 101 to the hot melt supply unit 130. Also at this time, since the mat 3 is made of a foamed rubber material having a high frictional resistance, the case 101 is conveyed to the hot melt supply unit 130 without causing a positional shift with respect to the mat 3.

  The hot melt supply unit 130 stands by at a preset gluing position, and starts supplying hot melt adhesive to a predetermined position of the case 101 placed on the movable table 1 by a signal from the supply adjustment controller 400. That is, according to the signal from the supply adjustment controller 400, the movable table 1 is moved in the front-rear direction D1 and the left-right direction D2, as shown in FIG. 2, and the hot melt adhesive is quantitatively determined from the tank 131 and the hot melt nozzle 60. Make it pour out. Also at this time, the movable table 1 moves back and forth and right and left at high speed, but the mat 101 is made of a foamed rubber material having high frictional resistance, so that the case 101 does not shift in position with respect to the mat 3. In this case, the hot melt nozzle 60 is not moved relative to the case 101, but the hot melt nozzle 60 is moved because the movable table 1 is moved back and forth and left and right to supply a constant amount of hot melt adhesive. There is no solidification or sagging at the tip of the nozzle 60.

  When the supply of the hot melt adhesive to the case 101 is completed, the movable table 1 automatically conveys the case 101 to the case discharge unit 140 according to a command from the table controller 200. After the case 101 is transported until it is easy for the operator to remove, when the operator removes the case 101 and releases his hand from the case discharger 140, the movable table 1 is positioned at the initial stage immediately below the image recognition unit 120. Return to.

  Thereafter, the same operation is repeated to paste the case 101 at a predetermined position. According to the apparatus 100, the processing time required for supplying the hot melt adhesive is 3 to 4 (seconds) per piece, and about 10 pieces can be glued per minute.

  Here, FIGS. 3A and 3B are a top view and a side view, respectively, illustrating a decorative compact case supplied with one hot melt adhesive by the device 100 of the present invention.

  In FIG. 3, a single recess n1 for storing the cake dish is formed inside the case body 101a of the compact case 101. On the other hand, according to the device 100 of the present invention, it can be seen that the hot melt adhesive M1 is accurately supplied to the recess n1 with respect to the target supply position O1.

  FIGS. 4A and 4B are a top view and a side view, respectively, illustrating a decorative compact case supplied with four hot melt adhesives by the device 100 of the present invention.

  In FIG. 4, four recesses n1 to n4 for storing cake dishes are formed inside the case body 101a of the compact case 101. The cake pans stored in these recesses n1 to n4 are substantially equal in size, so that not only the hot melt adhesive is accurately supplied to the target supply positions O1 to O3, but also the recesses n1 to n4. In each case, it is necessary to supply (pour out) the hot melt adhesive evenly.

  On the other hand, according to the device 100 of the present invention, as shown in FIG. 4, the hot melt adhesive M is supplied to each of the four recesses n1 to n4 in an equal amount to the target supply positions O1 to O4. I know that.

  FIG. 5 is a top view illustrating a decorative compact case supplied with three hot melt adhesives by the device 100 of the present invention.

  In FIG. 5, three recesses n1 to n3 for storing cake dishes are formed inside the case body 101a of the compact case 101. Since the cake dishes stored in these recesses n1 to n3 are different in size, not only the hot melt adhesive is accurately supplied to the target supply positions O1 to O3, but also the recesses n1 to n3 are stored. It is necessary to accurately carry out the supply amount (pouring amount) of the hot melt adhesive according to the difference in area.

  On the other hand, according to the apparatus 100 of the present invention, as shown in FIG. 5, the recess n1 having a large storage area is compared with the other recesses n2 and n3 with respect to the supply position O1 targeted by the hot melt adhesive M1. Many are supplied. Then, as shown in FIG. 10, the hot melt adhesives M2, M3 are also supplied to the other recesses n2, n3 in smaller amounts as the storage area becomes smaller with respect to the target supply positions O2, O3. I understand that.

As described above, the device 100 of the present invention is provided with the mat 3 made of rubber material on the movable table 1, and the case 101 to be processed is placed on the mat 3. ), The case 101 does not shift with respect to the movable table 1 as the movable table 1 moves. That is, according to the device 100 of the present invention, regardless of the form (shape) of the case, each time the case is different, there is no need to separately provide a means for fixing the case to the movable table 1. It is possible to easily position the movable table 1 simply by placing it on the mat 3.

Further, the device 100 of the present invention recognizes an image of the arrangement state of the case 101 placed on the movable table 1, and supplies hot melt adhesive to the case 101 based on information obtained by the image recognition. That is, according to the device 100 of the present invention, the hot melt adhesive is quantified continuously or intermittently in the supply portion on the case 101 without providing a switch or sensor for detecting the supply position for each different case. Can be supplied.

  Furthermore, the device 100 of the present invention moves the movable table 1 back and forth and from side to side to position the case 101 and supplies hot melt adhesive to the case 101. That is, according to the device 100 of the present invention, even when the arrangement of the supply portion is changed by changing the case 101 to a different case, it is necessary to newly increase or decrease the hot melt nozzle 60 according to the change of the arrangement. There is no need to change the hot melt nozzle 60 itself.

  Therefore, according to the device 100 of the present invention, it is possible to reduce the time required for preparations and adjustments due to frequent changes of the case 101 without increasing the size of the equipment. A hot melt supply apparatus with high performance can be provided. In addition, according to the device 100 of the present invention, the case 101 can be easily positioned with respect to the movable table 1 simply by placing the case 101 on the mat 3 on the movable table 1, and the supply of hot melt adhesive to the case 101 is also imaged. Since it can be performed based on recognition, the complexity of the work when supplying the case 101 can also be improved.

  By the way, in the device 100 of the present invention, the heat retaining cover 10 is attached to the hot melt nozzle 60. Therefore, the heat insulating cover 10 attached to the hot melt nozzle 60 will be described.

  FIGS. 6 (a) and 6 (b) are side views of a hot melt nozzle 60 for dispensing a hot melt adhesive quantitatively to a minute adhesive surface, and a heat insulating cover 10 attached to the hot melt nozzle 60. FIG. FIGS. 7A and 7B are a cross-sectional view showing a state in which the heat insulating cover 10 is attached to the hot melt nozzle 60 and a cross-sectional view of the main part thereof.

  The hot melt nozzle 60 is a hot melt gun including a nozzle body 61 filled with a hot melt adhesive pumped from the melt tank 131 and a nozzle tip 62 connected to the nozzle body 61. The nozzle tip 62 includes a drum-shaped portion 62a connected to the nozzle body 61 and a cone-shaped portion 62b having a sharp tip. A spout 63 through which hot melt adhesive is poured out is provided at the tip of the cone-shaped portion 62b, and the spout 63 is opened and closed by a needle valve (not shown) located above the spout passage 64.

  The needle valve has a cone-shaped portion 62b as a valve seat, and strokes the spout 63 so that it can be opened and closed by ON / OFF control of a piston (not shown) disposed in the nozzle body 61. Reference numeral 65 denotes a nut for attaching the nozzle tip 62 to the nozzle body 61. The nozzle body 61 also has a filling space (not shown) filled with a hot melt adhesive therein, and an electric heater that warms the hot melt adhesive in the filling space to an appropriate temperature that does not cause a quality change due to temperature. The heat generating part provided with is configured.

  That is, the hot melt gun 60 reheats the hot melt adhesive to an appropriate temperature with the nozzle body 61 and then controls the needle valve ON / OFF to spout the hot melt adhesive with stable quality. Quantitatively dispense from 63.

  Here, when the hot melt gun 60 is used alone, the nozzle tip 62 is directly exposed to the outside air A, wind or air flow w as shown in the figure. For this reason, when the temperature around the nozzle tip 62 is relatively low, or when wind blows, the hot melt adhesive solidifies immediately after jumping out of the spout 63 or after adhering to the spout 63. The solidified hot melt adhesive (hereinafter referred to as “microsolidified melt”) may block the spout 63.

  Therefore, the heat retaining cover 10 shown in FIG. 6B is attached to the outside of the hot melt gun 60 to prevent the generation of the micro solidified melt accompanying the cooling at the spout 63.

  As shown in FIG. 6B, the heat insulating cover 10 includes a cover body 11 that is integrally formed of copper having good thermal conductivity. The cover body 11 has a main chamber 13 that houses the nozzle body 61 of the hot melt gun 60 and a sub chamber 14 that is connected to the main chamber 13 and surrounds the nozzle tip 62 of the hot melt gun 60. The wall portion 15 of the sub chamber 14 has a thickness of preferably 3 mm or more, more preferably 3 to 5 mm for heat storage, and allows hot melt adhesive to be poured out from the spout 63 of the hot melt gun 60 to the outside. An opening 16 is provided. The opening 16 is slightly larger than the diameter of the spout 63 of the hot melt gun 60, and is preferably a minute hole having a diameter of about 2 to 5 mm, and has a tapered surface 16f that expands toward the outside. .

  Further, as shown in FIG. 7A, the inner wall 17 of the main chamber 13 is in contact with the outer surface 61f of the nozzle body 61 when the hot melt gun 60 is mounted. Thereby, the cover main body 11 can be quickly warmed by direct heat conduction from the nozzle body 61. Further, as shown in FIG. 4 (b), the sub chamber 14 has an abutment surface 18 that annularly contacts the end surface 66 of the drum-shaped portion 62 a, and is integrally connected to the abutment surface 18 and inclined toward the opening 16. And an inner wall 19 is provided. The inner wall 19 forms an annular gap C between the inner wall 19 and the cone-shaped portion 62b when the hot melt gun 60 is attached. As a result, the sub chamber 14 of the cover main body 11 almost completely shuts off the spout 63 of the hot melt gun 60 from the outside and suppresses the temperature drop at the spout 63.

  Further, as shown in FIG. 7A, the heat insulating cover 10 includes a cylindrical heat insulating layer 12 that surrounds the outer surface of the cover body 11 in the circumferential direction to prevent heat radiation from the cover body 11 to the outside. . The heat insulating layer 12 is fixed to the cover body 11 by an existing method such as press fitting or adhesion. Thereby, the heat insulating cover 10 is configured so that the cover main body 11 and the heat insulating layer 12 can be integrally attached to and detached from the hot melt gun 60.

  Next, the action of the heat insulating cover 10 will be described with reference to FIG.

  When the nozzle body 61 of the hot melt gun 60 is heated with a heater in order to dispense the hot melt adhesive from the hot melt gun 60 onto a minute adhesive surface, the heat Q1 generated from the nozzle body 61 is The cover body 11 is transmitted from the inner wall 17 of the 14 to warm the cover body 11, and the heat Q2 generated from the cover body 11 is further transferred from the contact surface 18 of the sub chamber 14 to the drum-shaped portion 62a of the nozzle tip 62. Then, it is transmitted to the entire nozzle tip 62.

  For this reason, when a certain period of time has elapsed after the preparation for dispensing the hot melt gun 60 is started, the temperature of the entire nozzle tip 62 becomes the appropriate temperature of the hot melt adhesive emitted from the nozzle body 61. In addition, in this case, since the cone-shaped portion 62b of the nozzle tip 62 is surrounded by the gap C formed in the sub chamber 14, the appropriate temperature in the cone-shaped portion 62b is caused by the thermal atmosphere generated in the gap C. It is maintained as it is. Accordingly, when the hot melt adhesive is dispensed by controlling the ON / OFF of the needle valve, the hot melt adhesive does not solidify at least until it passes through the opening 16, and the target fine adhesive surface is not solidified. Are poured out with high accuracy.

  Further, in this case, even when the hot melt adhesive adheres to the spout 63, the temperature of the entire nozzle tip 62 is maintained at the appropriate temperature of the hot melt adhesive, so that the molten state is not solidified. Can keep. This makes it possible to prevent hot melt adhesive from splashing, pouring position misalignment, pouring unevenness, etc. due to the generation of micro-solidified melt that is likely to occur during initial dispensing. Will be better.

  8 (a) and 8 (b) respectively show the adhesion pattern of the hot-melt adhesive when the hot-melt adhesive 60 is intermittently dispensed to the adhesive surface with the hot-melt gun 60 alone. An adhesion pattern of the hot melt adhesive when the hot melt gun 60 with the heat retaining cover 10 is intermittently dispensed the hot melt adhesive to the adhesive surface is shown.

When intermittent dispensing is performed with the hot melt gun 60 alone, as shown in FIG. 8 (a), immediately after the start of dispensing, hot melt adhesive splatters, bubbles, misalignment of the dispensing position, and injection. against to appear uneven, when performing quantitative dispensing a hot melt gun 60 equipped with a heat insulating cover 10 intermittently, as shown in FIG. 8 (b), immediately after the start of pouring, scattering of the hot melt adhesive , No bubbles, displacement of the pouring position (variation) and non-uniformity of pouring.

  That is, according to the heat insulating cover 10, it is possible to perform intermittent dispensing with little fluctuation in the dispensing amount without newly providing a heating means such as a heater that requires complicated temperature control. The amount dispensed can be accurately controlled each time. In addition, since the thermal insulation cover 10 is mounted on the outside of the hot melt gun 60, the design can be changed according to the hot melt gun to be used, so the hot melt gun 60 itself can be used without changing the design. can do.

  In particular, in the heat insulating cover 10, since the sub chamber 14 is provided with the contact surface 18 that contacts the nozzle tip 62 and suppresses the temperature drop of the nozzle tip 62 by heat conduction from the main chamber 11, the spout 63 Because the temperature at is maintained at the proper temperature of the hot melt adhesive emitted from the nozzle body 61, a stable hot melt adhesive that does not cause quality changes due to temperature even on minute adhesive surfaces is poured out. can do.

  Further, the heat insulating cover 10 is formed between the sub chamber 14 and the hot melt gun 60 because the inner wall 19 is formed in the sub chamber 14 so as to form a gap C between the hot melt gun 60 and the sub chamber 14. Since the heat-insulating space is formed when the gap C is warmed, the heat retaining property for the nozzle tip 62 is excellent. Further, since the gap C can give a certain degree of freedom in the assembly of the heat insulating cover 10 and the hot melt gun 60, the assembling work is easy and the working efficiency is improved. Furthermore, the heat insulating cover 10 forms a contact surface in which the inner wall 17 of the main chamber 13 contacts the body 61 of the hot melt gun 60 and heats the cover body 11 by heat conduction from the body 61. According to such a configuration, since the heat insulating cover 10 is quickly heated, the efficiency of the pouring work can be improved.

  In addition, in the heat insulating cover 10, since the cover body 11 is made of copper having good thermal conductivity, the waiting time until the temperature drop of the nozzle tip 62 is suppressed can be shortened, and the efficiency of the pouring work is reduced. Can be achieved. In addition, since copper is easily available and processed, it is excellent in productivity and can suppress production costs. Although the same effect can be obtained even when the cover body 11 is formed of aluminum, the material is not limited to copper or aluminum as long as the material has good thermal conductivity.

  Further, in the heat insulating cover 10, a heat insulating layer 12 for preventing heat radiation from the cover main body 11 is provided on the outer surface of the cover main body 11 extending from the main chamber 13 to a part of the sub chamber 14. In this case, the heat conduction efficiency of the cover body 11 is improved by the amount that can prevent the heat radiation from the cover body 11 to the outside world, and the heat retaining property for the nozzle tip 62 is improved. FIG. 9 shows a modified example of the heat insulating cover 10 in which the heat insulating layer 12 is provided on the entire outer surface of the cover main body 11 from the main chamber 13 to the sub chamber 14. As shown in this figure, it is most preferable that the heat insulating layer 12 is provided on the entire outer surface of the cover body 11 from the main chamber 13 to the sub chamber 14, but at least a part of the outer surface of the main chamber 13 and the sub chamber 14 is only used. As long as it is provided.

  FIGS. 10A and 10B are a side view of a main part showing a modification of the hot melt gun 60 and a cross sectional view of the main part showing a state in which the hot melt gun 60 is mounted on the heat insulating cover 10. . In the following description, the same parts as those in FIGS.

  As shown in FIG. 10A, the hot melt gun 60 is a type in which the nozzle tip 62 is composed only of a drum-shaped portion 62b. When the heat retaining cover 10 is attached to the hot melt gun 60, the gap C formed between the hot melt gun 60 and the inner wall 18 of the sub chamber 14 is wide as an inverted cone as shown in FIG. It can be secured in the gap.

  Furthermore, the heat insulating cover 10 can be attached to the hot melt gun 50 of FIG.

  The hot melt gun 50 also has a barrel 51 filled with hot melt pumped from the melt tank 131, and the barrel 51 includes an upper barrel 51a and a lower barrel 51b. Further, the front end portion 52 is connected to the lower body portion 51b, and the front end portion 52 includes a drum-shaped portion 52a directly connected to the body portion 51 and a cone-shaped portion 52b having a sharp tip. The cone-shaped portion 52b is provided with a spout 53 through which the hot melt adhesive filled in the nozzle body 51 is poured out. A needle valve (not shown) is provided at the top of the spout 54. The hot melt can be dispensed by opening and closing.

  The needle valve strokes the spout 53 provided in the cone-shaped portion 52b so as to be opened and closed by ON / OFF control of a piston (not shown) disposed in the upper body 51a. The stroke amount of the needle valve is determined by a stroke adjustment bolt 55 protruding from the upper body 51a. Reference numeral 56 denotes a positioning nut for positioning the stroke adjustment bolt 55. The lower body portion 51b has a filling space filled with a hot melt adhesive therein, and a heating portion provided with an electric heater that heats the hot melt in the filling space to an appropriate temperature that does not cause a quality change due to temperature. Configure.

  That is, the hot melt gun 50 performs hot dispensing of hot melt by operating the needle valve after warming the hot melt pumped from the melt tank 131 to an appropriate temperature in the lower body portion 51b.

  When a heat insulating cover is employed for such a hot melt gun 50, the nozzle body 51 accommodated in the main chamber 13 of the cover body 11 has the upper body 51a if at least the lower body 51b is housed. It doesn't matter whether they are stored.

  12 (a) and 12 (b) are perspective views each showing a cross section of a part of the second form and the third form of the heat insulating cover.

  A hot melt gun 70 shown in FIG. 12A includes a nozzle body 71 formed of a hexagonal column heater and a hexagonal column-shaped nozzle tip 72 connected to the nozzle body 71. Is opened and closed by ON / OFF control of the needle valve. In contrast, the heat retaining cover 20 has a hexagonal cross-section main chamber 23 that houses the nozzle body 71, and a circular cross-section subchamber 24 that is connected to the main chamber 23 and surrounds the nozzle tip 72. The wall 25 of the sub chamber 24 is composed only of a cover main body provided with an opening 26 for pouring hot melt adhesive into the outside through a spout provided in the nozzle tip 72.

  Similarly to the heat insulation cover 10, the heat insulation cover 20 also has an annular shape that contacts the end surface 76 of the nozzle tip 72 and suppresses the temperature drop of the nozzle tip 72 due to heat conduction from the main chamber 23. An abutting surface 28 and an inner wall 29 that forms an inverted conical gap C between the hot melt gun 70 are provided. Furthermore, the main chamber 23 also has six panel-shaped inner walls 27 with which the outer surface 71f of the nozzle body 71 comes into contact, like the heat insulation cover 10, and the heat generated from the nozzle body 71 is directly applied to the heat insulation cover 20. It is configured to be transmitted.

  A hot melt gun 80 shown in FIG. 12 (b) includes a nozzle body 81 formed of a cylindrical heater and a cylindrical nozzle tip 82 connected to the nozzle barrel 81, and is provided at the nozzle tip 82. The outlet is opened and closed by ON / OFF control of the needle valve. On the other hand, the heat insulating cover 30 includes a main chamber 33 having a circular cross-sectional shape that houses the nozzle body 81, and a sub-chamber 34 having a circular cross-section that is connected to the main chamber 33 and surrounds the nozzle tip 82. The wall 35 of the sub chamber 34 is composed only of a cover main body provided with an opening 36 for pouring hot melt adhesive into the outside from a spout provided in the nozzle tip 82.

  Similarly to the heat insulation cover 10, the heat insulation cover 30 is also in contact with the end face 86 of the nozzle tip portion 82, and, like the heat insulation cover 10, is an annular contact that suppresses the temperature drop of the nozzle tip portion 82 due to heat conduction from the main chamber 33. An inner wall 39 that forms an inverted conical gap C between the contact surface 38 and the hot melt gun 80 is provided. Further, the main chamber 33 also has an inner wall 37 having a circular cross-sectional shape in contact with the outer surface 81 f of the nozzle body 81, similarly to the heat insulation cover 10, and heat generated from the nozzle body 81 is directly transmitted to the heat insulation cover 30. It is configured as follows.

  12 (a) and 12 (b) show only the cover main bodies 21 and 31, respectively. However, the cover main bodies 21 and 31 are provided on the outer surfaces of the cover main bodies 21 and 31, respectively, like the heat insulating cover 10. , 31 may be provided with a heat insulating layer to prevent heat dissipation. That is, according to each of the above heat insulating covers, the design can be changed according to the hot melt gun, so that the hot melt gun itself can be used as it is without changing the design as shown in FIGS. 12 (a) and 12 (b). be able to.

  That is, each of the heat insulation covers has a sub-chamber surrounding the tip of the hot melt nozzle so that the tip is almost completely shielded from the outside and suppresses the temperature drop at the spout. Even if adhering to the spout, the molten state can be maintained without solidifying. As a result, it is possible to prevent occurrence of hot melt adhesive scattering, pouring position deviation, pouring unevenness, etc. due to the occurrence of micro-solidified melt that is likely to occur during initial pouring. Get better.

  Therefore, according to each of the heat retaining covers, it is possible to perform intermittent dispensing with little fluctuation in the dispensing amount without newly providing a heating means such as a heater that requires complicated temperature control. The amount dispensed can be accurately controlled for each delivery. In addition, since each of the above heat insulation covers is a heat insulation cover attached to the outside of the hot melt nozzle, the design can be changed according to the hot melt nozzle, so that the hot melt nozzle itself is not changed without changing the design. Can be used.

  In addition, since each sub-chamber of the cover main body only needs to surround the tip of the hot melt nozzle and heat the tip, the shape of the heat-insulating cover is limited to the shape of each of the above-described forms. Instead, it can also be applied to a hot melt nozzle that does not incorporate a heater. Moreover, the heat insulation cover can also combine various parts of each form according to the use and specification.

  As described above, in the apparatus 100 of the present invention, if the heat retaining cover 10 is attached to the hot melt nozzle 60, the hot melt adhesive does not solidify even if it adheres to the spout. It is possible to prevent the occurrence of splattering of hot melt adhesive, shift of the pouring position, pouring unevenness, and the like due to the occurrence of easy solidified products. That is, according to such a configuration, since the occurrence of a defect rate due to the supply failure of the hot melt adhesive is reduced, it is effective in small-lot production that is easily affected by the defect rate.

  In the device 100 of the present invention, since the mat 3 is made of a foam rubber material, a mat having a high frictional resistance can be manufactured easily and inexpensively, so that the cost of the entire device 100 of the present invention can be reduced. it can.

  Furthermore, the apparatus 100 of the present invention is provided with a supply station 113 that has a rough surface 113f on which the case 101 is placed and introduces the case 101 into the movable table 1 by its opening operation. In this case, since the case 101 can be mounted on the movable table 1 in a brushed-down manner, image recognition can be performed without causing a large shift in the position and orientation of the case 101 with respect to the horizontal direction.

The above description shows only one embodiment of the present invention, and various modifications can be made within the scope of the claims. For example, although this embodiment has been described as a desktop semi-automatic apparatus that manually supplies and discharges workpieces, it may be completely automated including supply and discharge of workpieces. Furthermore, in this embodiment, the table controller 200, the image recognition unit 300, and the supply adjustment controller 400 are provided separately. However, by combining these functions into the supply adjustment controller 400, the operator distributes the controller 400 to the controller 400. If manual or automatic control is performed collectively from the operation panel 401, it is possible to further reduce the time required for preparations and setup adjustments associated with workpiece changes. Moreover, the principal part of each said form can also be combined variously according to the use and specification.

  In addition, the work performed on the workpiece in the present invention is not limited to the supply of a substance such as a liquid substance, and for example, the work corresponding to the hot melt supply unit 120 is decorated, printed, or painted using an inkjet or the like. Alternatively, it is possible to blow-clean a fine part of the workpiece using pressurized air or the like. That is, the present invention does not matter what work is performed on the workpiece as long as it involves positioning of the workpiece and work on the positioned workpiece.

It is a side view which shows typically the hot-melt supply apparatus which is one form of this invention. It is a perspective view which shows typically the supply apparatus of the same form. (A), (b) is the top view and side view which illustrate the makeup | decoration compact case to which one hot-melt-adhesive agent was supplied in the same form, respectively. (A), (b) is the top view and side view which illustrate the makeup | decoration compact case to which the hot-melt-adhesive 4 points | pieces were supplied in the same form, respectively. In the form, it is the top view and side view which illustrate the makeup | decoration compact case to which three hot-melt-adhesive agents were supplied. (A), (b) is a side view of a hot melt nozzle for quantitatively dispensing a hot melt adhesive onto a minute adhesive surface, and a first embodiment of the present invention attached to the hot melt nozzle. It is a longitudinal cross-sectional view of the heat insulation cover which is. (A), (b) is sectional drawing shown in the state which attached the heat retention cover to the hot melt gun, and its principal part sectional drawing in the same form, respectively. (A), (b), respectively, in the same form, the hot melt adhesive adhesion pattern when the hot melt gun alone is intermittently dispensed quantitatively to the adhesive surface, and heat retention The adhesion pattern of a hot-melt adhesive when a constant amount of hot-melt adhesive is dispensed to the adhesive surface with a hot-melt gun equipped with a cover is shown. It is sectional drawing shown in the state with which the modification of the heat retention cover was mounted | worn with the hot-melt gun. (A), (b) is the principal part side view which shows the modification of a hot-melt gun, respectively, and principal part sectional drawing shown in the state with which this hot-melt gun was mounted | worn to the heat insulation cover. It is a side view of the hot-melt gun provided with the heater which is an example of a hot-melt nozzle. (A), (b) is a perspective view which shows a part of 2nd form and 3rd form of a heat insulation cover in a cross section, respectively.

Explanation of symbols

1 Movable table
2 Table body
3 mat
10 Thermal insulation cover
60 hot melt gun
100 hot melt feeder
110 Case introduction
111 Supply unit
112 Inlet
113 Supply station
113f rough side
120 Image recognition unit
121 Lighting equipment
122 image camera
130 Hot melt supply section
131 Melting tank
140 Case discharge section
200 Table controller
300 Image recognition unit
400 Supply adjustment controller

Claims (4)

A workpiece introduction unit that introduces a workpiece to be processed, an image recognition unit that recognizes an image of the arrangement state of the workpiece sent from the workpiece introduction unit, and hot work on the workpiece based on image information obtained by the image recognition unit A hot melt supply section for supplying a melt adhesive, a work discharge section for discharging the work supplied with the hot melt adhesive, and a supply unit movable between the image recognition section with the work introduction section as an initial position With
The supply unit includes an introduction port for introducing the workpiece into the image recognition unit, and a supply station having a rough surface on which the workpiece is placed and disposed below the introduction port, and the image recognition unit. The workpiece is dropped from the supply station in a brushed-down manner by moving to the opening and opening the inlet,
The image recognition unit is provided with a movable table which moves back and forth and left and right by placing the workpiece dropped from the supply unit, and an image recognizing image recognition means the arrangement of the workpiece placed on the movable table The movable table is provided with a mat made of a rubber material on which the work is placed and prevents the work from being displaced due to the movement of the movable table, and from the image recognition unit to the case discharge unit. To move and stop as appropriate between any of the steps up to
The hot melt supply unit, the movable table moves from the image recognition unit, a row of positioning of the workpiece is moved back and forth and left and right on the basis of the information by the image recognition unit Utotomoni, the hot melt adhesive to the workpiece Note hot melt supply system, characterized in that the shall comprise a hot melt nozzles out. The hot melt nozzle has a nozzle body and a nozzle tip, and has a cover body having a main chamber that houses the nozzle body and a sub chamber that is connected to the main chamber and surrounds the nozzle tip. The hot melt supply apparatus according to claim 1, further comprising a cover . The hot-melt supply device according to claim 2, wherein the heat insulating cover includes a heat insulating layer for surrounding the outer surface of the cover body in the circumferential direction to prevent heat dissipation to the outside . Positioning operation device according to any one of claims 1 to 3, wherein the workpiece is a decorative compact case.

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