JP4016187B2 - Cart of urethane skin forming equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention provides a base for a urethane skin molding apparatus.On the carMore specifically, in the vertical direction of a trolley with wheels that are used in an automated device for spraying a liquid urethane material onto a skin mold to form a urethane skin, and that arrives at various yards and stops. Is supported on the rear side of the carriage, so that urethane adhesion to the wheel can be prevented, and a stepping mold mounting carriage that can secure a wide foot of the operator is provided.
[0002]
[Prior art]
For example, vehicle interior members such as an instrument panel and a floor console are arranged in a passenger compartment such as a passenger car. This type of vehicle interior member generally has a three-layer structure of a skin material, a foam material, and a base material, and the skin material used for this is preformed in accordance with the contour shape of an instrument panel or the like. . The powder slush molding method and the vacuum molding method are conventionally used as the skin pre-molding technology, but as a supplement to the disadvantages inherent in these molding methods, urethane is sprayed onto the skin mold. A method of manufacturing a urethane skin formed in a required shape by forming a film with a required thickness and peeling off the film from the mold after the urethane material has solidified has also been implemented.
[0003]
That is, as shown in FIG. 15, a urethane film 43 having a required thickness is formed on the molding surface 39a by uniformly spraying a liquid urethane material from the spray nozzle 41 toward the molding surface 39a of the skin mold 39. The skin molding die 39 is provided with a heating pipe 45 through which a heat medium such as hot water flows, and the molding surface 39a is raised to an optimum temperature (for example, about 65 ° C.) for curing the urethane material after spraying. It is warm. The urethane material sprayed from the spray nozzle 41 includes a non-foaming type and a foaming type, and generally a premixed mixture of two types of raw material liquids is prepared. The urethane which is sprayed onto the molding surface 39a and has a uniform thickness is cured after a lapse of time, and the cured urethane film is removed from the skin molding die 39 as described above, thereby providing an instrument panel. The epidermis used for etc. is manufactured.
[0004]
[Problems to be solved by the invention]
For example, a turntable mechanism is employed as an apparatus for producing a urethane skin by spraying urethane onto the skin mold. This is because a plurality of skin forming dies are arranged for each required central angle on a turntable that can be rotated horizontally in a required circumferential direction, and (1) the release agent is blown out of the turn locus of the turntable. There are provided an attaching station, (2) urethane spraying station, (3) urethane curing station, and (4) urethane skin demolding station. Then, by turning the turntable intermittently or continuously at a slow speed, one of the skin forming molds is brought into correspondence with each station, and unique work is performed at the station. By doing so, the urethane skin is gradually formed. However, the turntable mechanism is simply provided with a plurality of skin molds, and each skin mold does not move individually. Therefore, there is a drawback that the timing at which the turntable rotates to transfer each skin mold to the next station always depends on the station that requires the most work time. As an example, if the demolding work at the demolding station is delayed due to the operator's incompatibility, etc., other skin molds cannot move to the next station even if the work at the corresponding station has been completed. Difficulties are pointed out.
[0005]
Therefore, the applicant of the present application proposed an invention capable of solving the above-mentioned drawbacks inherent in the conventional urethane skin molding process, and was patented as an "urethane skin automatic molding device" on June 18, 2002. An application (Japanese Patent Application No. 2002-177720) was filed. The present invention provides a release agent spraying yard in which a release agent is sprayed onto a skin mold, and a urethane provided on the downstream side in the circumferential direction adjacent to the release agent spray yard. A urethane spray yard that is sprayed, a urethane cure yard that is provided on the downstream side in the circumferential direction adjacent to the urethane spray yard and that solidifies the urethane sprayed to the skin mold over time, and the urethane Mounted on a mold release yard provided on the downstream side in the circumferential direction adjacent to the cure yard, for removing the urethane skin formed in the skin mold, and an endless rail arranged in a circle along the series of yards A plurality of independent self-propelled trolleys in which the skin mold is individually mounted, a first manipulator which is disposed in the release agent spraying yard and sprays the mold release agent on the skin mold, and the urethane A second manipulator which is disposed in the spray yard and sprays urethane onto the skin mold, and each of the independent self-propelled carts is allowed to independently reach any one of the series of yards. The feature is that the urethane skin is manufactured by carrying out the required work.
[0006]
According to the invention relating to this patent application, there is a beneficial effect that the liquid urethane material can be sprayed onto the skin mold, and for example, the process of molding the skin of the vehicle instrument panel can be efficiently performed. Played. By the way, in the release agent spraying yard and the urethane spraying yard which are indispensable for the implementation of the invention, the release agent and the urethane liquid are sprayed from the nozzle of the manipulator operated by computer control to the skin mold mounted on the cart. Attached. For this reason, the release agent or urethane mist diffused when sprayed onto the skin mold is dropped on the floor surface of each yard, and a viscous adhesion layer is gradually formed. However, since the rails on which the wheels of the carriage are mounted are laid on the floor surface of each yard, the aforementioned release agent and urethane mist gradually accumulate and adhere to the rails. It will also transfer to the wheel. Therefore, when the cart travels on the rails to move to the next yard after finishing the work in each yard, the viscous material transferred to the wheels of the cart causes dust on the factory site to adhere and Thus, it is pointed out that the scraping operation becomes difficult and, in some cases, the rolling resistance when the wheel travels on the rail is increased. Further, when performing the work of stripping the urethane skin from the skin mold in the mold release yard, if a wheel supporting the carriage is present in the vicinity of the operator's feet, the operator's feet interfere with the wheels and remove the footwork. Inhibits and in some cases is extremely dangerous.
[0007]
OBJECT OF THE INVENTION
  The present invention relates to an automated apparatus for spraying a liquid urethane material onto a skin mold to form a urethane skin of a required shape, and by devising the structure of the carriage used in the apparatus, a mold release agent Even if a sticky layer of release agent or urethane gradually accumulates on the floor surface of the spray yard or urethane spray yard, the viscous material does not transfer to the wheels of the cart, and work in the mold release yard. Table for safe skin molding without the user's feet interfering with the wheelsCarThe purpose is to provide.
[0008]
[Means for Solving the Problems]
  In order to overcome the above problems and achieve the intended purpose, the present invention provides:
  Equipped with a skin molding die in which a urethane skin of the required shape is molded by spraying urethane, a release agent spraying yard to the skin molding die, a urethane spraying yard to the skin molding die, and a urethane skin from the skin molding die It is a cart of a urethane skin forming device that runs on rails along a take-off yard,
in frontHorizontal frame on which the outer skin mold is mountedWhen,
  On the back bottom surface of the horizontal frame, and at a part away from the work area in each yardArrangedMultiple wheelsAnd
  By mounting these wheels on the rail,SaidThe rail is configured to support a vertical load applied to the horizontal frame on the rail.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
  Next, the base of the urethane skin molding apparatus according to the present inventionOn the carThis will be described below with reference to the accompanying drawings. 1 is a schematic plan view of an automatic molding apparatus that can suitably perform an automatic molding process of a urethane skin, FIG. 2 is an enlarged plan view of FIG. 1, and FIG. 3 is an observation of FIG. 4 is an enlarged plan view of an arbitrary independent self-propelled carriage shown in FIG. 2, and FIG. 5 is a vertical cross-sectional view of the independent self-propelled carriage observed from the direction of arrows 5-5 in FIG. Is a longitudinal sectional view of the independent self-propelled carriage observed from the direction of arrows 6-6 in FIG. 4, FIG. 7 is a front view of the independent self-propelled carriage observed from the directions of arrows 7-7 in FIG. It is a schematic perspective view which shows the whole structure of the automatic molding apparatus of the urethane skin which concerns on an Example.
[0010]
(Overview of overall configuration)
In FIG. 1, the factory floor on which the cart support rail 30 is laid circularly is divided into the following four sections along the cart support rail 30.
(1) A release agent spraying yard 10 for spraying a release agent onto a skin forming die 24, which is surrounded by a chamber partially opened radially inward and mounted on an independent self-propelled carriage (18) described later.
(2) A urethane spray yard 12 provided in the circumferential direction adjacent to the release agent spray yard 10 for spraying liquid urethane onto the skin mold 24. The urethane spray yard 12 is also surrounded by a chamber partially opened radially inward.
(3) A urethane cure yard 14 provided in the circumferential direction adjacent to the urethane spray yard 12 for curing the urethane applied to the skin mold 24. The urethane cure yard 14 is easily partitioned by, for example, a wall enclosure 27 to restrict entry of workers and the like.
(4) A mold release yard 16 provided in the circumferential direction adjacent to the urethane cure yard 14 for taking out the urethane skin formed on the skin molding die 24. The demolding yard 16 allows an operator to freely enter and engage in demolding work.
[0011]
As will be described later, the three independent self-propelled carriages 18 each equipped with the skin mold 24 are centered on a vertical fixed shaft 40 erected and arranged at the center of the circularly-supported carriage support rail 30. It is possible to run independently on the top. That is, each self-propelled carriage 18 arrives at each yard intermittently in the order of release agent spraying yard 10 → urethane spraying yard 12 → urethane cure yard 14 → demolding yard 16 and stops, and performs necessary work. After that, it goes to the next yard adjacent in the circumferential direction.
[0012]
(About the structure that supports the carriage)
As shown in FIGS. 2, 3, and 8, for example, a frame-like lower structure 32 that is a combination of steel frames is installed on a factory site where an automatic urethane skin forming apparatus is installed. A plurality of ring support beams 34 (eight in the embodiment) extend horizontally outward in the radial direction. The plurality of ring support beams 34 have a large-diameter lower ring 28 fixed to the tip thereof, and further, on the upper ends of vertical struts 36 disposed at the inner circumference of the lower ring 28 for each required central angle, A lower ring 28 and an upper ring 26 having the same diameter are fixed concentrically.
[0013]
The upper ring 26 functions to support the horizontal load applied to the independent self-propelled carriage 18 while guiding the following three independent self-propelled carriages 18 to travel in the circumferential direction. Further, the lower ring 28 positioned below the upper ring 26 by a required distance has a flat chain 60 wound around and fixed to the outer periphery thereof. As will be described in detail later, a sprocket 62 of a reduction gear 66 provided on a vertical frame 82 constituting the independent self-propelled carriage 18 is engaged with the chain 60, and a carriage driving motor 64 connected to the reduction gear 66 is provided. By rotating and driving, the independent self-propelled carriage 18 circulates in the clockwise direction in FIG. 1 and sequentially arrives at and stops at the release agent spraying yard 10, the urethane spraying yard 12, the urethane cure yard 14, and the mold release yard 16. Is.
[0014]
As shown in FIGS. 3 and 8, a frame-like upper structure 38 in which the central axes are aligned and a steel frame is combined is installed above the lower structure 32, and the center of the top portion of the upper structure 38 is arranged. A vertical fixing shaft 40 is erected on the side. In the present embodiment, since three independent self-propelled carriages 18 are provided, three bearings 42 are aligned in the axial direction on the vertical fixed shaft 40, and each of the bearings 42 is shown in FIGS. The end portions of the two carriage support beams 44, 44 shown in FIG. Each cart support beam 44 extends horizontally as shown in FIGS. 3, 5, and 6, and the other end of the support beam 44 forms a cart vertical frame 82 that forms a vertical plane of the independent self-propelled cart 18. It is fixed. Accordingly, each independent self-propelled carriage 18 can circulate independently around the vertical fixed shaft 40 in combination with a carriage support rail 30 and wheels 46 described later.
[0015]
(About circular rail)
As shown in FIGS. 2 and 8, a circular and large-diameter bogie support rail 30 is laid on the factory site with the center portion of the lower structure 32 (that is, the central axis of the vertical fixed shaft 40) as the center. ing. The carriage support rail 30 is concentric with the upper ring 26, but its diameter is set to be larger than the diameter of the upper ring 26.
[0016]
(Independent self-propelled cart)
As shown in FIG. 3 and FIGS. 5 to 7, the independent self-propelled carriage 18 is erected on the rear side of the carriage horizontal frame 80 on which the skin forming mold 24 is individually mounted, and the carriage horizontal frame 80. It is comprised from the trolley | bogie vertical frame 82. FIG. A plurality of wheels 46 are rotatably supported via a plurality of vertical brackets 48 at a portion of the back surface of the horizontal frame 80 that is close to the vertical frame 82 of the vehicle. The locations of the plurality of wheels 46 are such that when the carriage support beam 44 of the independent self-propelled carriage 18 is attached to the vertical fixed shaft 40 so as to be able to circulate freely, the wheels 46 come into contact with the carriage support rail 30 from above. Thus, the independent self-propelled carriage 18 is set at a position capable of supporting the vertical load. As shown by the broken line in FIG. 4, it is preferable to provide three wheels 46 at a required interval along the curve of the carriage support rail 30. As described above, the plurality of wheels 46 of the independent self-propelled carriage 18 are arranged on the back surface of the rear side of the carriage horizontal frame 80 and are mounted on the rail 30 to apply a vertical load applied to the carriage horizontal frame 80. Is supported by the rail 30.
[0017]
Thus, in the independent self-propelled carriage 18 according to the embodiment, the rear side of the carriage horizontal frame 80, for example, the arrangement side of the second manipulator 22 in the urethane spray yard 12, or the worker's work area side in the mold release yard 16. There is no wheel 46 in a region close to the wheel. That is, the wheels 46 of the independent self-propelled carriage 18 are disposed on the back bottom surface of the carriage horizontal frame 80 and in the recessed portion adjacent to the carriage vertical frame 82, so that the wheels 46 are mounted correspondingly. The laying position of the rail 30 can also be set at a location recessed from the work area of each yard. Accordingly, in the release agent spray yard 10 and the urethane spray yard 12, when the release agent or urethane liquid is sprayed from the manipulator nozzle 19 to the skin mold 24, the release agent or urethane mist diffused in the air. Even if the rail 30 accumulates and adheres to the floor surface of each yard, the viscous mist may adhere to and accumulate on the rail 30 because the rail 30 is laid at a site avoiding the accumulation region of the deposit. Absent. For this reason, it is not necessary to scrape off the viscous material deposited on the rail 30 or increase the rolling resistance of the wheels 46. In the mold release yard 16, when the urethane skin is peeled off from the skin molding die 24, the wheels 46 that support the independent self-propelled carriage 18 do not exist near the operator's feet. It does not interfere with the wheels 46 and is extremely safe.
[0018]
By the way, although said wheel 46 is supporting the vertical load from the independent self-propelled carriage 18 on the carriage support rail 30, it is only mounted on the carriage support rail 30. When a load in the radial direction is applied to the carriage 18 for any reason, the carriage 18 may be removed from the carriage support rail 30. Therefore, as shown in FIGS. 4 and 6, a horizontal bracket 54 is disposed at the lower portion of the cart vertical frame 82, and extends horizontally above the cart support rail 30. Rollers 50 and 52 having a vertical rotation axis are opposed to the horizontal bracket 54 at a required interval, and the carriage support rail 30 is slidably held by the rollers 50 and 52. Yes.
[0019]
(Guide mechanism with upper ring)
As shown in FIGS. 3, 4, and 6, the carriage support beam 44 is pivotally supported at one end on the vertical fixed shaft 40 via the bearing 42 and at the other end with the carriage of the independent self-propelled carriage 18. By connecting to the vertical frame 82, it is possible to go around the upper ring 26. The carriage support beam 44 is provided with two L-shaped brackets 58 and 58 at a position directly above the upper ring 26, and each L-shaped bracket 58 has a ring holding ring such as a rubber tire at its hanging end. 56 is pivotally supported in a horizontally rotatable manner. The ring holding rings 56 and 56 pivotally supported by these two L-shaped brackets 58 and 58 tightly hold the vertical portion of the H-shaped steel constituting the upper ring 26 from both sides, whereby the carriage supporting beam 44 is supported. A radially outward load applied to the connected independent self-propelled carriage 18 is supported by the upper ring 26, and a smooth circumferential guide of the independent self-propelled carriage 18 can be achieved.
[0020]
(About the drive source of the independent self-propelled carriage)
As shown in FIGS. 5 and 6, a flat chain 60 is wound around and fixed to the outer periphery of the lower ring 28, and the sprocket 62 of the speed reducer 66 is engaged with the chain 60, so that the independent The self-propelled carriage 18 can be self-propelled. That is, as shown in FIGS. 4 and 5, the sprocket is attached to the rear side of the vertical frame 82 of the independent self-propelled carriage 18 with the output shaft directed vertically downward, and fixed to the output shaft. 62 meshes with the chain 60 wound around the lower ring 28. A carriage driving motor 64 is connected to the upper portion of the speed reducer 66, and power is supplied to the carriage driving motor 64 through, for example, a slip ring 15 (see FIG. 3) provided above the vertical fixed shaft 40. It is. Accordingly, the rotation of the carriage driving motor 64 is decelerated by the speed reducer 66 and transmitted to the sprocket 62, and the sprocket 62 meshes with the chain 60 so that the independent self-propelled carriage 18 circulates around the vertical fixed shaft 40. Self-run. At this time, the load applied to the independent self-propelled carriage 18 in the vertical direction is supported by the carriage support rail 30 via the wheels 46 as described above, and acts on the outside of the independent self-propelled carriage 18 in the radial direction. The horizontal load is supported by the vertical fixed shaft 40 via the carriage support beam 44 and the bearing 42. In addition, instead of the chain 60 wound around the lower ring 28, a segment in which teeth are formed on the outer arc surface of an arc-shaped member having a required curvature is sequentially arranged on the outer periphery of the lower ring 28. It is good also as a rack.
[0021]
(About the locking mechanism of the carriage)
As shown in FIGS. 2 to 5, when the independent self-propelled carriages 18 arrive and stop at predetermined positions of the release agent spraying yard 10, the urethane spraying yard 12, and the release yard 16, the independent self-propelled trucks 18. Is provided in each corresponding yard. For example, the fixing cylinder 84 is fixed horizontally to the support column 36 located on the opening side of the urethane blowing yard 12 (as will be described later, when the independent self-propelled trolley is moved away, the part that opens greatly in the partition wall of the yard). The front end of the piston rod 17 is directed to the opening side of the urethane spray yard 12 so as to freely advance and retract. The independent self-propelled carriage 18 has a C-shaped structure in a plane (described later), and a positioning piece 86 projects from the center of the vertical frame 82 of the carriage and at the apex of the “C” -shape. ing. When the tip of the piston rod 17 in the fixing cylinder 84 abuts on the positioning piece 86, the independent self-propelled carriage 18 is fixed. The piston rod 17 has a tapered round end, and the positioning piece 86 is provided with a reverse tapered recess correspondingly.
[0022]
That is, while the independent self-propelled carriage 18 circulates along the upper ring 26 and the carriage support rail 30, the fixing cylinder 84 is in a deenergized state, and the piston rod 17 is retracted into the cylinder body. ing. However, when the independent self-propelled carriage 18 enters the urethane spray yard 12, for example, a sensor such as a limit switch (not shown) detects the arrival at the fixed position, and the control panel (not shown) is used for driving the carriage. A stop command is given to the motor 64, and an urging command for the fixing cylinder 84 is issued. As a result, the fixing cylinder 84 is energized to extend the piston rod 17 and abut against the positioning piece 86 of the independent self-propelled carriage 18 stopped at a fixed position. As described above, the tip of the piston rod 17 has a tapered round shape, and the positioning piece 86 is provided with a reverse tapered recess, so that the tip of the piston rod 17 is the recess of the positioning piece 86. By entering the vehicle while colliding with each other, even if there is a slight misalignment in the independent self-propelled carriage 18, the misalignment can be corrected and locked in place. Therefore, the independent self-propelled carriage 18 is maintained in a stable state during the urethane spraying operation on the skin mold 24. In the urethane cure yard 14, it is not necessary to stably fix the independent self-propelled carriage 18, but rather, it is more necessary to increase the cure time while slowly running the independent self-propelled carriage 18. The urethane cure yard 14 is not provided with the locking mechanism.
[0023]
(About release agent spray yard and urethane spray yard)
The release agent spraying yard 10 is a chamber for spraying the release agent on the mold surface of the skin molding die 24 mounted on the independent self-propelled carriage 18, and spraying the release agent is performed as follows. This is performed by the nozzle 19 of the first manipulator 20 disposed in the yard 10. The urethane spray yard 12 is a chamber for spraying urethane onto the mold surface of the skin mold 24 until it has a controlled thickness, and the urethane spray is injected into the yard 12. This is performed by the nozzle 19 of the second manipulator 22 provided. That is, the release agent spraying yard 10 and the urethane spraying yard 12 can define a substantially sealed indoor space in the yard when the independent self-propelled carriage 18 arrives and stops at a fixed position of each corresponding yard. It has become. The reason is that in the release agent spraying yard 10 and the urethane spray yard 12, the release agent and urethane are sprayed against the skin mold 24, so that it is partitioned by a wall to protect the work environment and forced ventilation. Because it is necessary to do. Further, when urethane is sprayed at the urethane spray yard 12, it is necessary to control the temperature of the environmental atmosphere by performing air conditioning in order to control the curing time of the urethane.
[0024]
Therefore, the release agent spraying yard 10 is surrounded by a plurality of vertical partition walls 21 as shown in FIGS. 1 to 3, for example, and the upper part of the release agent spraying yard 10 is covered with a ceiling 25 having a required height. A booth for spraying the release agent is defined. As shown in FIG. 14, when the independent self-propelled carriage 18 leaves the release agent spraying yard 10, an open area that is not surrounded by the vertical partition wall 21 on the rear side of the release agent spraying yard 10, that is, a large area. An opening 23 is opened. When the independent self-propelled carriage 18 that has been waiting in the upstream demolding yard 16 arrives at the release agent spraying yard 10, the opening 23 is a part of the cart vertical frame 82 in the independent self-propelled carriage 18. The yard 10 can be made substantially sealed by being closed by a vertical wall surface. In this yard structure, the urethane spray yard 12 located adjacent to the downstream side of the release agent spray yard 10 is exactly the same, and the urethane spray yard 12 has an opening 23.
[0025]
(About Urethane Cure Yard and Demold Yard)
The urethane cure yard 14 is a yard for securing the time required for solidification of the urethane sprayed from the nozzle 19 of the second manipulator 22 to the skin mold 24 in the urethane spray yard 12 of the previous step. Accordingly, the independent self-propelled carriage 18 equipped with the skin forming die 24 is slowed down toward the mold release yard 16 on the downstream side even if the solidification time elapses while the yard 14 is stopped. The solidification time may elapse while traveling. In this urethane cure yard 14, there is no possibility that the mist such as the above-mentioned release agent will scatter, and there is no need for air conditioning. Therefore, it is not necessary to make the yard 14 a booth-like closed space. However, a simple wall enclosure 27 may be provided as shown in FIGS. 1 and 14 in order to restrict free entry of workers and the like.
[0026]
The demolding yard 16 is a work area for demolding a urethane product (for example, a vehicle instrument panel) formed on the surface of the skin mold 24 mounted on the independent self-propelled carriage 18. As will be described later, the horizontal frame 80 constituting the independent self-propelled carriage 18 is formed in a planar shape in a plan view, and the wheels 46 supporting the vertical load of the independent self-propelled carriage 18 are provided in the demolding yard 16. Since the position is sufficiently deeper than the work area of the worker, the worker's scaffolding area is sufficiently secured and the efficiency of the demolding work can be improved.
[0027]
(About details of independent self-propelled cart)
Although the general structure of the independent self-propelled carriage 18 has already been described, further details will be described. As described above, the independent self-propelled carriage 18 basically comprises a carriage horizontal frame 80 having wheels 46 and a carriage vertical frame 82 rising vertically from the rear side of the carriage horizontal frame 80. The skin mold 24 is mounted. As shown in the plan view of FIG. 4, the cart horizontal frame 80 is disposed on the side where the first manipulator 20 is disposed in the release agent spraying yard 10, that is, on the release agent spraying work area side, or on the release yard. The demolding work area side in FIG. As a result, the horizontal frame 80 of the carriage moves backward as the center side of the various work areas moves toward the vertical fixed shaft 40 that forms the center of rotation of the independent self-propelled carriage 18, and thus a wider work area is secured.
[0028]
Here, if the horizontal frame 80 of the independent self-propelled carriage 18 having the “C” shape is referred to as a first wing 29 (right side) and a second wing 31 (left side) for convenience, the first wing 29 Each of the second wings 31 is equipped with a single skin forming die 24. For example, as shown in FIG. 4, when the independent self-propelled carriage 18 has arrived and stopped at a fixed position of the release agent spraying yard 10, the horizontal frame 80 of the carriage is operated in the release agent spraying yard 10. A first wing 29 having an inner edge gradually deviating from one side of the region toward the center of the self-propelled carriage 18, and the self-propelled cart 18 from the other side of the work area in the release agent spraying yard 10. And a second wing 31 having an inner edge that gradually deviates toward the center.
[0029]
In this way, the independent self-propelled carriage 18 is formed in a “C” shape by the first wing 29 on the right side and the second wing 31 on the left side, so that the first wing 29 is located on the front side of the carriage 18. The work area surrounded by the inner edge of the second wing 31 and the inner edge of the second wing 31 is enlarged by a portion having a mountain shape in the plane. Moreover, since the skin mold 24 is mounted on each of the first wing 29 and the second wing 31, the manipulator 20 (22) is controlled by the computer and operated with various degrees of freedom. The nozzles 19 are positioned very close to the corresponding skin forming dies 24. That is, when the nozzle 19 sprays a release agent or urethane, the movement distance of the nozzle 19 can be minimized and efficiency can be improved. With respect to this point, the work area can be similarly expanded in the urethane spray yard 12 and the demolding yard 16 in the subsequent process. In particular, in the demolding yard 16, two skin molding dies 24 are mounted on the independent self-propelled carriage 18, so that one worker can perform the work of stripping the urethane skin after molding from each molding die 24. It is extremely useful to improve work efficiency that a large work area is secured when taking charge.
[0030]
As shown in FIG. 12, the upper surface of the skin mold 24 is a undulating surface 33 for molding, for example, an instrument panel. The skin mold 24 is not fixedly mounted on the first wing 29 and the second wing 31 but is mounted so as to be raised and lowered by a required vertical distance. When the release agent is sprayed by the release agent spray yard 10 and when urethane is sprayed by the urethane spray yard 12, the nozzles 19 of the first manipulator 20 and the second manipulator 22 and the skin mold 24 are In order to accurately adjust the relative position, height control is performed by raising and lowering the skin mold 24. In addition, the raising / lowering mechanism of the skin shaping | molding die 24 is later mentioned with reference to FIGS.
[0031]
The carriage vertical frame 82 in the independent self-propelled carriage 18 is constituted by three continuous vertical wall surfaces as indicated by reference numerals 82a, 82b, and 82c in FIG. 4, and has a U-shaped wall surface as a whole. That is, the independent self-propelled carriage 18 includes a rear side wall surface 82c, a left wall surface 82a, and a right wall surface 82b. As shown in FIG. 2, each of the independent self-propelled carts 18 and 18 includes the release agent spraying yard 10 and urethane. When the spray yard 12 arrives and stops at a fixed position, the corresponding vertical wall surfaces 82a to 82c close the opening 23 of each yard, and thus can define a substantially sealed space in the yard. Is.
[0032]
(About mist suction mechanism)
In the release agent spray yard 10, the first manipulator 20 sprays the release agent onto the skin mold 24, and in the urethane spray yard 12, the second manipulator 22 sprays urethane. In order to prevent the mist generated by this spraying operation from spreading in the factory, flexible ducts 70 are provided in both yards 10 and 12 so as to be movable up and down, and mist suction boxes 68 and filters are provided in each independent self-propelled carriage 18. 78 is disposed. When the independent self-propelled carriage 18 arrives at the release agent spraying yard 10 and the urethane spraying yard 12, the flexible duct 70 descends and docks with the mist suction box 68, and the mist in the yard is forced by the reduced pressure air. It has come to be collected.
[0033]
For example, as shown in FIGS. 4 and 5, the first wing 29 and the second wing 31 of the independent self-propelled carriage 18 are located behind the area where the skin forming mold 24 is mounted (that is, the center of rotation of the independent self-propelled carriage 18). The filter 78 is disposed vertically, and the release agent or urethane mist sprayed and scattered by the skin mold 24 collides with the filter 78. A mist suction box 68 is disposed on the rear side of the filter 78 in the independent self-propelled carriage 18, and an opening (not shown) of the mist suction box 68 is opened to communicate with the back surface of the filter 78. ing. A cylinder 72 rising vertically is provided on the upper surface of the mist suction box 68, and the cylinder 72 communicates with the inside of the mist suction box 68.
[0034]
Further, as shown in FIGS. 7, 9 and 10, an elevating support 76 connected to an elevating mechanism (not shown) is horizontally disposed inside the release agent spraying yard 10 and the urethane spraying yard 12, The two cylindrical adherends 74 and 74 provided in the vicinity of both ends of the elevating support 76 have their openings directed downward. Each cylindrical adherend 74 is connected to a flexible duct 70, and the flexible duct 70 is connected to a vacuum suction source (not shown). Then, when the independent self-propelled carriage 18 arrives and stops at a fixed position of the release agent spraying yard 10 or the urethane spraying yard 12, the lifting support 76 that has always been waiting at the lifted position is lowered to each cylindrical shape. An adherend 74 is attached to a cylinder 72 standing on the mist suction box 68. At this time, since the flexible duct 70 is connected to the vacuum suction source, the mist in the yard is thereby collected when passing through the filter 78.
[0035]
(About mold positioning mechanism)
On the floor surface of the release agent spraying yard 10, the urethane spraying yard 12, and the demolding yard 16, and at the place where the independent self-propelled carriage 18 stops at a fixed position, the skin molding die 24 is attached to the independent self-propelled carriage 18. A mechanism is provided for positioning the skin mold 24 with respect to the nozzle 19 of the manipulator 20 (22) by raising or lowering it by a controlled distance. For example, as shown in FIG. 14, pits 88, 88 are recessed in the stop floor of the independent self-propelled carriage 18 in the urethane spray yard 12 and at a position directly below the first wing 29 and the second wing 31. ing. As shown in FIGS. 12 and 13, the support frame 35 is horizontally disposed in the pit 88, and a horizontal support plate 92 is disposed on the upper surface of the support frame 35. Further, as shown in FIGS. 11 to 13, the horizontal support plate 92 is provided with a pair of bushes 98 at a required interval, and a guide rod 96 is inserted into each bush 98 so as to be vertically movable. . The horizontal support plate 92 is provided with three vertical cylinders 94 as shown in FIG. 11, and the piston rod 37 is directed vertically upward.
[0036]
As shown in FIG. 11, the elevating plate 90 disposed in the pit 88 is fixed to the tops of the two guide rods 96, 96, and is guided by the guide rod 96 by a required distance with respect to the horizontal support plate 92. Can be moved up and down. Further, the piston rods 37 of the three vertical cylinders 94 are inserted and fixed on the back surface of the elevating plate 90, and the open end 13 of the rod 37 is slightly protruded from the upper surface of the elevating plate 90. Further, on the back surface of the skin mold 24, three receiving portions 11 are provided corresponding to the arrangement pattern of the three vertical cylinders 94, and the piston rod 37 in the vertical cylinder 94 is opened to each receiving portion 11. The end 13 can be fitted. Accordingly, when the vertical cylinder 94 is energized synchronously, the piston rod 37 that is always retracted and is in the lowered position moves forward, and thereby the lifting plate 90 is also lifted to open the piston rod 37. The end 13 is brought into contact with the corresponding receiving portion 11, and the skin mold 24 can be raised by a required distance. Further, when the vertical cylinder 94 is deenergized, the piston rod 37 is retracted downward, and the skin mold 24 is lowered again and is stably placed on the independent self-propelled carriage 18.
[0037]
According to the urethane skin automatic forming apparatus according to the embodiment configured as described above, any independent self-propelled carriage 18 can independently run, and therefore, for some reason, one independent self-propelled carriage 18 is in operation. Even if it is troublesome, the other two independent self-propelled carriages 18 can be individually moved to the nearest yard, and the work given to the yard can be advanced first. For example, in the mold removal yard 16, it takes time to remove the urethane skin from the skin molding die 24, or it takes time to cure the urethane in the urethane cure yard 14 due to a decrease in room temperature as in winter. Even so, a high degree of freedom is given to the work in other yards, which contributes to an increase in work efficiency as a whole.
[0038]
【The invention's effect】
  As explained above, the base of the urethane skin forming apparatus according to the present inventionOn the carAccording to the present invention, in an automated apparatus for spraying a liquid urethane material onto a skin mold and forming a urethane skin of a required shape, it is used for the release agent spray yard, urethane spray yard and mold release yard. The wheels used for the trucks that arrive and stop sequentially are arranged on the back bottom of the horizontal frame and in the recessed part close to the vertical frame so that the wheels are mounted correspondingly. The rail laying position can also be set at a location recessed from the work area of each yard. Therefore, even if a sticky layer of release agent or urethane is gradually formed on the floor surface of the release agent spraying yard or urethane spraying yard, it does not deposit and adhere to the rail. There is no transfer. In the mold release yard, the operator's feet do not interfere with the wheels, and the mold release operation can be performed safely.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of an automatic molding apparatus according to an embodiment for performing an automatic molding process of a urethane skin.
FIG. 2 is an enlarged plan view of a main part of FIG.
FIG. 3 is a longitudinal sectional view of FIG. 2 observed from the direction of arrows 3-3.
FIG. 4 is an enlarged plan view of an independent self-propelled carriage.
5 is a longitudinal sectional view of the independent self-propelled carriage observed from the direction of arrows 5-5 in FIG.
6 is a longitudinal sectional view of an independent self-propelled carriage observed from the direction of arrows 6-6 in FIG.
7 is a front view of the independent self-propelled carriage observed from the direction of arrows 7-7 in FIG. 4;
FIG. 8 is a schematic perspective view showing an overall configuration of an automatic urethane skin molding apparatus according to an embodiment.
FIG. 9 is a front view of an independent self-propelled carriage, and shows a state in which an elevating support and a cylindrical adherend are waiting at an elevated position with respect to a mist suction box.
FIG. 10 is a front view of the independent self-propelled carriage, and shows a state in which the lifting support and the cylindrical adherend are lowered and coupled to the mist suction box.
FIG. 11 is a schematic explanatory view showing a state in which a molding die positioning mechanism exists below the skin molding die mounted on the cart when the independent self-propelled cart stops at a fixed position.
FIG. 12 is a partial longitudinal sectional view of a molding die positioning mechanism, showing a state before positioning with respect to the skin molding die.
FIG. 13 is a partial longitudinal sectional view of the positioning mechanism of the mold, showing a state in which the positioning is performed with respect to the skin mold.
FIG. 14 is a schematic plan view of the urethane skin automatic molding apparatus according to the embodiment, showing a state in which the independent self-propelled carriage has left the release agent spray yard and the urethane spray yard.
FIG. 15 is a schematic explanatory view showing a conventional method for forming a skin by urethane spraying.
[Explanation of symbols]
10 Release agent spraying yard 11 Receiving part
12 Urethane spray yard 13 Open end (of piston rod)
14 Urethane cure yard 15 Slip ring
16 Demold Yard 17 Piston Rod
18 Independent self-propelled trolley 19 Nozzle
20 First manipulator 21 Vertical partition
22 Second manipulator 23 Opening
24 Skin mold 25 Ceiling
26 Upper ring 27 Wall enclosure
28 Lower ring 29 First wing
30 Bogie support rail (endless rail) 31 2nd wing
32 Substructure 33 Uneven surface
34 Ring support beam 35 Support frame
36 Vertical support 37 Piston rod
38 Superstructure 40 Vertical fixed shaft
42 Bearing 44 Bogie support beam
46 wheels 48 vertical bracket
50 rollers 52 rollers
54 Horizontal bracket 56 Ring clamping ring
58 L-shaped bracket 60 Chain (engagement band)
62 Sprocket (engaging wheel) 64 Bogie drive motor
66 Reducer 68 Mist suction box
70 flexible duct 72 cylinder
74 Cylindrical adherend 76 Lifting support
78 Filter 80 Bogie Horizontal Frame
82 Bogie Vertical Frame 84 Cylinder for Fixing
86 Positioning piece 88 Pit
90 Lift plate 92 Horizontal support plate
94 Vertical cylinder 96 Guide rod
98 bush

Claims (4)

Equipped with a skin molding die (24) in which a urethane skin of the required shape is formed by spraying urethane, a release agent spraying yard (10) to the skin molding die (24), and to the skin molding die (24) A urethane skin molding machine carriage (18) that travels on a rail (30) along a urethane spray yard (12) and a release yard (16) for removing the urethane skin from the skin molding die (24),
A horizontal frame (80) to pre-Symbol skin mold (24) is mounted,
A plurality of wheels (46) disposed on the rear bottom surface of the horizontal frame (80) and at a position away from the work area in each of the yards (10, 12, 16) ,
These wheels (46) that is rests on the rail (30), urethane skin layer forming, characterized in that the vertical load applied to the horizontal frame (80) is configured so as to be supported on the rail (30) the base car of the device. The rail (30) is configured as a circular endless rail, a vertical fixed shaft (40) is erected in the center of the endless rail (30), and a bearing (42) mounted on the vertical fixed shaft (40); The carriage (18) is connected by a carriage support beam (44), whereby a horizontal outward load acting on the carriage (18) is supported by the vertical fixed shaft (40). claim 1 platform car urethane skin layer forming apparatus according. The release agent spraying yard (10), the urethane spraying yard (12), and the mold release yard (16) are disposed in a circumferential direction along the circular endless rail (30), and the carriage (18) is Claims are made so as to move to the next yard (10, 12, 16) located on the downstream side adjacent to the yard after performing the required work in the specific yard (10, 12, 16). 2 platform cars urethane skin layer forming apparatus as set forth. The carriage (18) is composed of a horizontal frame (80) on which a skin mold (24) is mounted, and a vertical frame (82) erected on the back side of the horizontal frame (80) when viewed from the work area. consisting claim 1 platform car urethane skin layer forming apparatus according.

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