JPH07256191A - Force curing method of sealant and photoirradiation device - Google Patents

Abstract

PURPOSE:To carry out force curing of a sealant applied between the coupling surface of a sewing machine arm and sewing machine bed constituting a sewing machine frame and reduce the cost by efficiently irradiating the sealant with light. CONSTITUTION:This photoirradiation device is provided with a guide 146 nearly complying with the applying locus of the photosetting sealant applied on the coupling part of the sewing machine arm A an the sewing machine bed B. The device is provided with a movable photoirradiation nozzle 143 which irradiates the sealant with spot light almost along the applying locus of the sealant while moving along the guide 146. The sealant is irradiated with the spot light almost along the applying locus of the sealant by using such spot photoirradiation nozzle 143, by which the sealant in the coupling part of the sewing machine arm A and the sewing machine bed B is forcibly cured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a method for forcibly curing a sealant applied between joining surfaces of parts such as a sewing machine arm and a sewing machine bed which constitute a sewing machine frame, and a light irradiation device used therefor.

[0002]

2. Description of the Related Art In a sewing machine manufacturing process, a sewing machine frame is assembled by fastening a sewing machine arm of a sewing machine and a sewing machine bed with bolts. At this time, in order to prevent oil from leaking from the joint surface, a sealant is applied to the joint portion of the sewing machine bed before the joint, and then the joint is bolted to the sewing machine arm. After the bonding, an ultraviolet irradiation device is used to irradiate the sealing agent with ultraviolet rays for a certain period of time to cure the sealing agent.

FIG. 15 and FIG. 16 show an example of the structure of a conventional ultraviolet irradiation device 151, in which a sealant S is applied to the joint between the sewing machine arm A and the sewing machine bed B, and the sewing machine in the joined state is shown. The arm A and the sewing machine bed B are transported to a fixed position by the automatic transport device 161, and positioned by the positioning device 162. Then, the sealing agent S is cured by irradiating the entire sealing agent S with ultraviolet rays for a certain period of time by the pair of high-pressure mercury lamps 152, 152 of the ultraviolet ray irradiating device 151.

[0004]

However, in such a conventional ultraviolet irradiation device 151, as shown in the drawing,
Since the entire surface coated with the sealant S is irradiated with ultraviolet rays, the efficiency is poor. Further, as the irradiation range becomes wider, the capacity of the high-pressure mercury lamps 152, 152 must be increased correspondingly, which requires a large amount of electric power, resulting in a running cost.

The sewing machine arm A and the sewing machine bed B, which are parts, are also high-pressure mercury lamps 152, 152.
There is a problem that the parts are thermally affected because they are directly irradiated with ultraviolet rays from the parts. In addition, the high pressure mercury lamp 152,
Since the 152 generates a large amount of ultraviolet rays, the large covers 153, 1 are used to suppress the amount of the ultraviolet rays leaking to the outside.
53 is required, and there is a drawback that the structure of the ultraviolet irradiation device 151 becomes large.

Therefore, an object of the present invention is to forcibly irradiate the sealing agent applied between the joining surfaces of the sewing machine arm and the sewing machine bed constituting the sewing machine frame with light so that the cost can be reduced. It is to provide a curing method.

Another object of the present invention is to provide a spot irradiation type light irradiation device used in such a forced curing method of a sealant.

[0008]

In order to solve the above problems, the invention according to claim 1 forcibly irradiates the sealing agent applied to the joint between one component and another component with light to forcibly force it. In a method of curing a sealant, a movable spot light irradiation nozzle that spot-irradiates light is used, and while moving the spot light irradiation nozzle substantially following the application trajectory of the sealant, the application trajectory of the sealant is almost It is characterized by a forced curing method of the sealant so that light is irradiated along it.

According to a second aspect of the invention, in the first aspect of the invention, the one component and the other component are a sewing machine arm and a sewing machine bed that form a sewing machine frame.

The invention according to claim 3 is an apparatus for irradiating light to a sealing agent applied to a joint portion between one component and another component, and the apparatus moves substantially following the application trajectory of the sealing agent. However, it is characterized by a light irradiation device having a movable spot light irradiation nozzle for spot-irradiating light substantially along the coating path of the sealant.

Further, the invention according to claim 4 is the same as claim 3
In the invention described above, the spot light irradiating nozzle is characterized in that it moves along a guide provided substantially following the application trajectory of the sealing agent.

According to a fifth aspect of the present invention, in the third or fourth aspect of the invention, the one component and the other component are a sewing machine arm and a sewing machine bed that form a sewing machine frame. .

[0013]

According to the first aspect of the invention, the movable spot light irradiation nozzle for spot-irradiating light is used to substantially follow the application trajectory of the sealant applied to the joint between one component and the other component. Since the method of irradiating the sealing agent with light while irradiating the sealing agent with the sealing agent is forcibly cured, the sealing agent can be efficiently irradiated with the light.

Therefore, as described in claim 2, the curing treatment of the sealant at the joint between the sewing machine arm and the sewing machine bed constituting the sewing machine frame can be performed efficiently and at low cost.
Moreover, since it is a spot irradiation method, the amount of light leaking to the outside is small, so that the structure of conventional covers is simplified. Further, the problem of heat influence on the work as in the past is solved.

According to the third aspect of the present invention, while substantially following the application locus of the seal agent applied to the joint between one component and the other part, the movement substantially follows the application locus of the seal agent. Since it is a light irradiating device equipped with a movable spot light irradiating nozzle for irradiating light with a spot, the sealant can be efficiently irradiated with light.

Further, according to the fourth aspect of the invention, since the spot light irradiation nozzle moves along a guide provided substantially following the application track of the sealant, the light beam substantially along the application track of the sealant can be obtained. Irradiation can be performed reliably.

Therefore, as described in claim 5, the curing treatment of the sealant at the joint between the sewing machine arm and the sewing machine bed constituting the sewing machine frame can be performed efficiently and at low cost.
Moreover, since it is a spot irradiation method, the amount of light leaking to the outside is small, so that the structure of conventional covers is simplified. Further, the problem of heat influence on the work as in the past is solved.

[0018]

Embodiments of the method for forcibly curing a sealant and a light irradiation device according to the present invention will be described below with reference to FIGS. 1 to 14.

First, FIGS. 1 and 2 show an assembly line as an example to which the present invention is applied. A is a sewing machine arm, B is a sewing machine bed, C is a central control panel, D is a main connection control box, and M is a control box. Is a master work, 1 is a cleaning station, 2 is a sealant application station,
3 is a temporary joining station, 4 is a main joining station, 5
Is an ultraviolet curing station, 7, 8 and 9 are conveying devices, 1
0 is a bed cleaning device, 30 is an arm cleaning device, 50 is a sealant applying device, 70 is a temporary joining device,
Reference numeral 100 is a main bonding device, and 130 is a sealant drying device (ultraviolet irradiation device).

In the embodiment, a sewing machine frame assembly line is shown as a component assembly line. As shown in the drawing, this sewing machine frame assembly line is a cleaning station 1, a sealant application station 2, a temporary joining station 3, and a main joining station. 4 and the ultraviolet curing station 5 are arranged in this order. Then, the sewing machine arm A is attached to the cleaning station 1, the sealing agent applying station 2,
A transfer device 7 for automatically transferring to the temporary joining station 3,
A transport device 8 for automatically transporting the sewing machine bed B to the temporary binding station 3, and a transport device 9 for automatically transporting the sewing machine arm A and the sewing machine bed B temporarily coupled at the temporary binding station 3 to the main binding station 4 and the ultraviolet curing station 5. Is provided. These transport devices 7, 8,
Reference numeral 9 is composed of a roller conveyor or the like.

First, in the cleaning station 1,
The bed cleaning device 10 is disposed on the transfer device 8 side, and the arm cleaning device 30 is disposed on the transfer device 7 side. In the next sealing agent applying station 2, a sealing agent applying device 50 is arranged on the side of the conveying device 8.
At the next temporary joining station 3, a temporary joining device 70 is arranged so as to straddle the two transport devices 7 and 8. In the next main binding station 4, the main binding device 100 is arranged along the transport device 9.

Then, in the next ultraviolet curing station 5, an ultraviolet irradiation device 130 which is a light irradiation device according to the present invention as a sealant drying device is arranged along the conveying device 9. In the vicinity of the above sewing machine frame assembly line, the central control panel C and the main connection control box D
Are arranged side by side, and the main combining station 4
Has a master work M as a sewing machine frame to be assembled.

FIG. 3 is a flow chart showing the processing in each station of the above sewing machine frame assembly line,
First, in step S10 of the cleaning station 1, air blowing of the sewing machine bed B that is individually carried in (step S11), air blowing of the sewing machine arm A (step S12), and the like are performed. In the next step S20 of the sealing agent application station 2, after detecting the model of the sewing machine bed B (step S21), the sealing agent is applied (step S22) and the application state is confirmed (step S2).
3) Do. Further, the model of the sewing machine arm A (step S19) is also detected separately.

Step S3 of the next temporary joining station 3
At 0, the coupling bolt is supplied (step S31), and the bolt is temporarily tightened (step S32). In step S40 of the next main combining station 4, the sewing machine arm A is
Also, after detecting the model of the sewing machine frame in which the sewing machine bed B is temporarily connected with bolts (step S41), each part is measured (step S42), and the position is corrected if necessary based on the measurement (step S43). And then
Each part is measured again (step S44). In step S50 of the next ultraviolet curing station 5, the sealing agent on the bonding surface is cured. Although not shown, after the ultraviolet curing station 5, in order to hold the position so that the precision of the main coupling does not deviate due to an external force,
A knocking station for driving the knock pins is provided.

Next, the details of the ultraviolet irradiation device 130 which is the light irradiation device according to the present invention will be described. 4 to 13 show the details of the ultraviolet irradiation device 130 which is a sealant drying device. This ultraviolet irradiation device 130 is located between the joining surfaces of the sewing machine arm A and the sewing machine bed B, which are fully joined in the previous step. The purpose is to efficiently irradiate the protruding portion of the sealant with ultraviolet rays to cure it.

As shown in FIGS. 4 to 13, the ultraviolet irradiation device 130 has a first structure in which the carrier device 9 is connected.
The work positioning jig 131 and the second work positioning jig 132 are provided in the front and rear by a cylinder so as to be movable in the vertical direction, and an entrance shutter 134 that automatically opens and closes is provided on the front and rear surfaces of a box 133 that covers the UV irradiation work space. An exit shutter 135 is provided. Further, front and rear ultraviolet lamp houses 136 and 137 are arranged on one side of the box 133. In addition, 14
Reference numeral 7 is an operation panel.

From the ultraviolet lamp house 136 on the front side with respect to the conveying direction, as shown in FIGS. 9 and 10, the ultraviolet irradiation nozzles 139, 139 form a front-rear pair via optical fiber cables 138, 138. It is provided. Before and after this UV irradiation nozzle 139,13
9 is incorporated in a robot 141 via nozzle holders 140, 140 for holding the same, respectively, and the robot 141 moves the robot 9 forward and backward in a lateral direction in parallel.

Further, from the ultraviolet lamp house 137 on the rear side with respect to the carrying direction, as shown in FIGS. 11 to 13, the ultraviolet irradiation nozzles 143, 143 form a left-right pair via the optical fiber cables 142, 142. It is provided in. The left and right ultraviolet irradiation nozzles 143, 14
The robot 3 is moved by the robots 145 and 145 along the both sides of the carrier device 9 in the front-rear direction.

That is, the left and right ultraviolet irradiation nozzles 143, 1
43 are respectively incorporated in robots 145, 145 via nozzle holders 144, 144 holding them, and along the guide grooves 146, 146 of bending shape corresponding to the sealant locus S by the robots 145, 145. By moving the nozzle holders 144 and 144, ultraviolet rays are spot-irradiated.

FIG. 8 is a flow chart showing the processing in the above ultraviolet irradiation device 130. First, the work is conveyed (step S201) and the work is positioned (step S202). Then, the optical fiber cable (nozzle) is moved to the irradiation site (step S20
3), irradiating ultraviolet rays from the nozzle (step S20)
4). Further, the optical fiber cable (nozzle) is moved following the irradiation locus (step S205), and then the irradiation of ultraviolet rays is turned off (step S206). After that, the positioning of the work is released (step S20
7), the work is conveyed to the next process (step S20)
8).

Next, the connection between the sewing machine arm A and the sewing machine bed B by the above-described automatic sewing machine frame assembling apparatus will be described.

First, as shown in FIGS. 1 and 2, in the cleaning station 1, the sewing machine bed B, which has been subjected to processing such as punching in the previous step, is automatically transferred to the bed cleaning device 10 by the transfer device 8, and The sewing machine arm A, which has been subjected to processing such as drilling in the previous step and laid down aside, is automatically transferred to the arm cleaning device 30 by the transfer device 7.

In the bed cleaning device 10, the sewing machine bed B is air-blown on the entire upper surface, needle plate screw holes, and needle plate groove by a blow nozzle (not shown), while the entire lower surface and lower shaft hole are air-blown. Cutting chips and dust that have adhered and remained in the previous process are removed.
The sewing machine bed B thus cleaned is
At the next sealing agent application station 2, the transfer device 8
Are automatically conveyed to the sealant applying device 50.

Then, in the sealant applying device 50,
Although not shown, the dispenser unit is scanned along a predetermined locus by the operation of the robot, and the colored UV-curable sealant is discharged from the nozzle onto the upper surface of the sewing machine bed B. The sealant is applied along the contour of the connecting surface with the sewing machine arm A, and then the sewing machine bed B is automatically transferred to the next temporary combining station 3 by the transfer device 8.

In the arm cleaning device 30, the sewing machine arm A is laid sideways and air is blown to the front and rear needle bar shaft holes and the upper shaft hole by a blow nozzle (not shown) so that the entire lower surface and the vertical shaft hole. Is air blown, and the coupling screw holes and vertical shaft holes are also air blown,
Furthermore, the brush unit (not shown) brushes the connecting surface facing the side, and it is attached and adhered in the previous process.
Residual chips and dust are removed.

The sewing machine arm A thus cleaned is automatically transported to the temporary binding device 70 by the transport device 7 at the next temporary binding station 3. Also,
As described above, the sewing machine bed B coated with the sealant at the sealant coating station 2 is automatically transported to the temporary coupling device 70 by the transporting device 8.

Then, in the temporary coupling device 70, the sewing machine arm A lying sideways is grasped by an arm clamp hand, which is not shown, and raised, and then the sewing machine arm A is held.
The posture of the sewing machine is changed to the upright state, and the sewing machine is sent above the sewing machine bed B. The sewing machine arm A is positioned above the sewing machine bed B. In this positioning state, a slight gap is secured between the lower surface (coupling surface) of the sewing machine arm A and the upper surface of the sewing machine bed B. Therefore, the sealing agent applied to the upper surface of the sewing machine bed B in the previous step is used. It does not adhere to the bonding surface of A.

In this state, the nut runner positioned below the sewing machine bed B causes the connecting bolts, which are set head down by the robot hand of the bolt supply device 90, to be set on each bit of the sewing machine from the sewing machine bed B. Tighten each into the connecting screw hole of arm A. After that, the nut runner is lowered, and the arm clamp hand in which the clamp of the sewing machine arm A is released is raised to stand by at the initial position.

The sewing machine arm A and the sewing machine bed B which have been temporarily combined in this manner are connected to the next main combining station 4
At, the transport device 9 automatically transports the binding device 100.

Then, in this coupling apparatus 100, the sewing machine bed B in which the sewing machine arm A is temporarily coupled in the upright state is
Although not shown, the work clamp unit is positioned and the upper surface of the sewing machine arm A is pressed by the work clamp unit. Subsequently, although not shown, the arm hand of the three-axis correction robot grips the periphery of the coupling portion of the sewing machine arm A, and at the same time, the needle plate unit moves to the sewing machine bed B.
It is fixed with screws.

Although not shown, the temperature sensor starts temperature measurement by contact with the side surface of the sewing machine arm A, and another temperature sensor starts temperature measurement by contact with the upper surface of the sewing machine bed B. Thereafter, although not shown, a vertical shaft inspection rod, a needle bar inspection rod, and a lower shaft inspection rod are inserted into the holes of the sewing machine arm A and the sewing machine bed B, respectively, and the coupling bolts are temporarily loosened by the servo nut runners.

As a result, the sewing machine arm A and the sewing machine bed B become free, and the positions of the sewing machine arm A and the sewing machine bed B can be measured and the accuracy can be obtained.
That is, although not shown, two electric micrometers respectively detect their positions by contacting two side surfaces of the lower shaft probe, and one electric micrometer detects the position by contacting the side surfaces of the vertical shaft. To detect. Further, although not shown, three electric micrometers provided in the needle plate gauge portion of the needle plate unit respectively detect their positions by contacting at three places around the needle bar inspection rod.

Thereafter, based on the measurement data of the sewing machine arm A and the sewing machine bed B, the position of the sewing machine arm A with respect to the sewing machine bed B becomes a predetermined accuracy by the full-closed feedback control by the three-axis correction robot. Repeat positioning. That is, X by the servo motor
By driving the axis motor, the Y-axis motor, and the θ-axis motor, the fine movement table moves in the front-back direction (X direction), the left-right direction (Y direction), and the θ direction around the vertical axis (or Z direction), and the fine movement is performed. The position of the sewing machine arm A, which holds the periphery of the coupling portion, is performed on the arm hand integrally provided on the table.

When the positioning is performed as described above and the coupling accuracy is OK, the servo nut runner tightens the coupling bolts to a predetermined torque while the arm hand holds the periphery of the coupling portion of the sewing machine arm A. After that, the arm hand and the work clamp unit are unclamped, and the accuracy is measured again. When OK, the arm hand, work clamp unit, electric micrometer, vertical axis inspection rod, needle bar inspection rod, lower axis inspection rod. , Servo nut runner, and needle plate unit are returned to the initial state.

The sewing machine arm A and the sewing machine bed B, which have been fully coupled as described above, are carried out to the carrying device 9 and the cycle is completed. The above operation is repeated when the next start signal is input.

Here, according to the coupling device 100, the following effects can be obtained. (1) High-accuracy positioning (in μm units) is possible by electrical coupling accuracy measurement considering the function of the sewing machine and full-closed feedback control by a 3-axis NC robot. (2) Since the precision of the sewing machine frame is obtained in the upright state, there is no influence on the precision due to the weight of the sewing machine arm as in the inverted state. (3) The 3-axis robot unit and the arm clamp hand grip the sewing machine arm coupling portion having high rigidity, so that the sewing machine frame is not distorted when precision is obtained. (4) Since the sewing machine arm is held by the arm clamp hand when the connecting bolt is fastened, the positional deviation due to the tightening torque does not occur. (5) Since accuracy is obtained by full-closed feedback control by NC, it is possible to predict in advance the distortion due to the sewing machine bed clamp and the thermal distortion due to the temperature difference between the sewing machine arm and the sewing machine bed, and to obtain the accuracy.

Further, the sewing machine arm A and the sewing machine bed B, which have been fully coupled as described above, are transferred by the transfer device 9 into the ultraviolet irradiation device 130 in the next ultraviolet curing station 5.

Then, in the ultraviolet irradiation device 130,
As shown in FIGS. 4 to 7, the sewing machine bed B having the sewing machine arm A permanently coupled to the upper surface is first positioned on the first work positioning jig 131. Subsequently, as shown in FIG. 9 and FIG. 10, the ultraviolet lamp house 136 on the front side is formed.
Front and rear pair of ultraviolet irradiation nozzles 139, 139 provided via optical fiber cables 138, 138
However, the robot 141 causes the nozzle holders 140, 140
1 reciprocating movements in parallel from the lateral direction on the transporting device 9 via the respective ones, and with respect to the sealing agent protruding from the periphery of the coupling portion of the sewing machine arm A with respect to the upper surface of the sewing machine bed B, the front and rear sides of the sealing agent are moved along the lateral direction by 1 It circulates back and forth and irradiates each spot with ultraviolet rays.

After that, the first work positioning jig 131
The positioning to the upper side is released, and the sheet is sent by the transfer device 9, and then the sewing machine bed B is positioned on the second work positioning jig 132. Then, FIGS.
As shown in FIG. 3, the pair of left and right UV irradiation nozzles 143 and 143 provided from the UV lamp house 137 via the optical fiber cables 142 and 142 are installed in the robot 1.
45 and 145 make one reciprocating movement in the front-rear direction along both sides of the transport device 9 via the nozzle holders 144 and 144, respectively.

That is, the guide grooves 146, 14 having a bent shape corresponding to the seal agent locus S are formed by the robots 145, 145.
By moving the nozzle holders 144 and 144 along the position 6, the ultraviolet irradiation nozzles 143 and 143 forming a pair of left and right are
The sealing agent protruding from the periphery of the joining portion of the sewing machine arm A with respect to the upper surface of the sewing machine bed B is reciprocated one by one on the left and right sides in the front-rear direction, and the ultraviolet rays are respectively spot-irradiated.

By the way, FIG. 14 is the same as FIG. 9 and FIG.
9 shows a modified example of the ultraviolet scanning unit of FIG. In the above embodiment, the pair of front and rear ultraviolet irradiation nozzles 139 and 139 are assumed to be moved in parallel from the lateral direction onto the transfer device 9 by the robot 141. However, in the example of FIG. Although the nozzle 139 is moved in parallel from the lateral direction onto the transfer device 9 by the robot 141 in the same manner as in the above embodiment, the other ultraviolet irradiation nozzle 139 is moved by the robot 141 to the guide groove 149 having a curved shape corresponding to the sealant locus S. It is supposed to move along.

That is, as shown in FIG. 14, the UV irradiation nozzle 139 on the rear side, which irradiates UV rays from the rear side in the work transfer direction, is laterally moved on the transfer device 9 by the robot 141, as in the previous embodiment. For the ultraviolet irradiation nozzle 139 on the front side, which moves in parallel to the workpiece conveyance direction from the rear with respect to the workpiece conveyance direction, the support arm 148 of the nozzle holder 140 is moved to the robot 14
The movable table 141a extending in the front-rear direction is slidably assembled in the front-rear direction and moves along a guide groove 149 having a curved shape corresponding to the sealant locus S.

Therefore, only the rear UV irradiation nozzle 139 provided from the UV lamp house 136 via the optical fiber cable 138 is placed on the transfer device 9 via the nozzle holder 140 by the robot 141, as in the previous embodiment. The seal agent protruding from the periphery of the connecting portion of the sewing machine arm A with respect to the upper surface of the sewing machine bed B is spot-irradiated with ultraviolet rays from the rear side by making one reciprocating movement at right angles from the lateral direction.

The front UV irradiation nozzle 139 provided from the UV lamp house 136 via the optical fiber cable 138 mounts the support arm 148 along the guide groove 149 having a shape corresponding to the sealant locus S bent by the robot 141. As the nozzle holder 140 reciprocates in the lateral direction on the transfer device 1 through the carrier, the sealing agent protruding from the periphery of the coupling portion of the sewing machine arm A with respect to the upper surface of the sewing machine bed B is virtually drawn from the front side in FIG. As shown by the line, ultraviolet rays are spot-irradiated along the curved shape of the sealant locus S.

In this way, the ultraviolet irradiation nozzle 13 on the front side is
9 is a guide groove 1 having a shape corresponding to the bending of the sealant locus S.
The left and right ultraviolet irradiation nozzles 143, 14 are configured so as to make one reciprocating movement in the lateral direction on the conveyor 9 along the line 49.
3 may be configured to make one reciprocating movement in parallel along both sides of the transport device 9.

Here, according to the ultraviolet irradiation device 130 which is the light irradiation device according to the present invention, the following effects can be obtained.

(1) With the spot irradiation method, the irradiation is performed following the coating path of the sealant, so that the efficiency is high and the running cost is greatly reduced.

(2) Since the spot irradiation method is used, the amount of ultraviolet rays leaking to the outside is small, so that the structure of the covers is simplified.

(3) Since the spot irradiation method is used, the work is not affected by heat.

Further, the sewing machine arm A and the sewing machine bed B, which are fully bonded and the sealing agent is cured as described above, are provided.
Is transported to the next knocking station (not shown) and processed into a finished product by a predetermined finishing device.

As described above, according to the automatic assembling apparatus of the embodiment, the following effects can be obtained. (1) Conventional manual work can be carried out fully automatically. (2) Since the process is performed while the sewing machine frame is in the upright state, there is no precision influence due to its own weight, unlike the conventional sewing machine arm in the inverted state. (3) It is possible to connect the sewing machine arm and the sewing machine bed having different temperatures.

In the above embodiments, the sewing machine frame is assembled by connecting the sewing machine arm and the sewing machine bed. However, the present invention is not limited to this, and other machine parts may be assembled. Good. In addition, it is needless to say that the specific detailed structure and the like can be appropriately changed.

[0063]

As described above, according to the method for forcibly curing a sealant according to the first aspect of the invention, one component and another component are formed by using a movable spot light irradiation nozzle for spot-irradiating light. Since the light is emitted substantially along the application trajectory of the sealant while moving along the application trajectory of the sealant applied to the joint portion with, it is possible to efficiently irradiate the sealant with light. it can.

Therefore, as described in the second aspect, the curing treatment of the sealant at the joint between the sewing machine arm and the sewing machine bed constituting the sewing machine frame can be performed efficiently and at low cost. Moreover, since it is a spot irradiation method and the amount of light leaking to the outside is small, it is possible to simplify the structure of conventional covers. Further, it is possible to solve the problem of heat influence on the work as in the past.

According to the light irradiating device of the third aspect of the invention, the sealing agent of the sealing agent is moved while substantially following the application locus of the sealing agent applied to the joint portion between one component and the other component. Since the movable spot light irradiating nozzle that irradiates the light spot is provided substantially along the coating locus, the sealant can be efficiently irradiated with the light.

Further, according to the light irradiating device of the fourth aspect of the invention, the spot light irradiating nozzle is made to move along a guide provided substantially following the application locus of the sealing agent. It is possible to irradiate the light surely along the trajectory.

Therefore, as described in the fifth aspect, the curing treatment of the sealant at the joint between the sewing machine arm and the sewing machine bed constituting the sewing machine frame can be performed efficiently and at low cost. Moreover, since it is a spot irradiation method and the amount of light leaking to the outside is small, it is possible to simplify the structure of conventional covers. Further, it is possible to solve the problem of heat influence on the work as in the past.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an assembly line as an example to which the present invention is applied.

FIG. 2 is a schematic plan view of the assembly line of FIG.

FIG. 3 is a flowchart showing a process in each station of an assembly line.

FIG. 4 is a plan view of an ultraviolet irradiation device that is a light irradiation device according to the present invention.

FIG. 5 is a front view of an ultraviolet irradiation device.

FIG. 6 is a side view of an ultraviolet irradiation device.

FIG. 7 is another side view of the ultraviolet irradiation device.

FIG. 8 is a flowchart showing a process in the ultraviolet irradiation device.

FIG. 9 is a front view showing one ultraviolet scanning unit.

10 is a side view of the ultraviolet scanning unit of FIG.

FIG. 11 is a perspective view showing the other ultraviolet scanning unit.

12 is a schematic plan view of the ultraviolet scanning unit of FIG.

13 is a schematic front view of the ultraviolet scanning unit in FIG.

FIG. 14 is a plan view showing a modification of the ultraviolet scanning unit shown in FIGS. 9 and 10.

FIG. 15 is a plan view showing a configuration example of a conventional ultraviolet irradiation device.

16 is a front view of the ultraviolet irradiation device of FIG.

[Explanation of symbols]

 A sewing machine arm B sewing machine bed C central control panel D main binding control box M masterwork S sealant locus 1 cleaning station 2 sealant coating station 3 temporary binding station 4 binding station 5 UV curing station 7,8,9 transfer device 10 Bed cleaning device 30 Arm cleaning device 50 Sealing agent applying device 70 Temporary joining device 90 Volt supply device 100 Main joining device 130 Sealing agent drying device (ultraviolet irradiation device) 131, 132 Work positioning jig 136, 137 Ultraviolet lamp house 138, 142 Optical fiber cable 139,143 UV irradiation nozzle 140,144 Nozzle holder 141,145 Robot 146,149 Guide groove

Claims (5)

[Claims] 1. A movable spot light irradiation nozzle for irradiating light in a spot in a method of irradiating light to a sealing agent applied to a joint between one part and another part to forcibly cure the sealing agent. The method for forced curing of a sealing agent, wherein the spot light irradiation nozzle is moved substantially along the application trajectory of the sealing agent, and light is emitted substantially along the application trajectory of the sealing agent. 2. The method for forcibly curing a sealant according to claim 1, wherein the one component and the other component are a sewing machine arm and a sewing machine bed that form a sewing machine frame. 3. A device for irradiating light to a sealant applied to a joint between one part and another part, wherein the sealant is applied while moving substantially following the application trajectory of the sealant. A light irradiating device comprising a movable spot light irradiating nozzle that irradiates light substantially along a locus. 4. The light irradiating device according to claim 3, wherein the spot light irradiating nozzle moves along a guide provided substantially following the application locus of the sealant. 5. The light irradiating device according to claim 3, wherein the one component and the other component are a sewing machine arm and a sewing machine bed that constitute a sewing machine frame.