JPH06254965A - Deposition device of synthetic resin pallet - Google Patents

Abstract

PURPOSE:To ensure that the type, shape and size requirements of a pallet are satisfied and positioning the pallet in the center is possible by transporting a part in an upright position, allowing a part transport mechanism to hold a spool protruding from the part, and mounting a positioning frame for the upper and lower part support parts of a pressure bonding mechanism in freely detachable manner. CONSTITUTION:If a part stands by at an inlet of a conveyor part 117 with the butted-in surface of the part positioned upright in a vertical direction, a part transport part 119 moves backward to hold a spool jutting out of the part, and transports the part to a specified position for a part carry-in mechanism 103 in synchronization with the drive of the conveyor part 117. The pressure bonding mechanism 100 consists of an upper part support part 109 and a lower part support part 110 which are arranged so that these separate from each other relatively. Further, a positioning frame 363 for positioning the part in the center is mounted in freely detachable manner, in front of a travelling base 230 at the upper part support part 109. Thus it is possible to maintain a stop position constantly as specified, if the size of the part changes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin pallet welding apparatus for integrally butting and welding an upper part and a lower part, which are molded separately in the upper and lower parts, and more specifically, to a crimping mechanism for both parts constituting the welding device. And a component loading mechanism into the crimping mechanism.

[0002]

2. Description of the Related Art Conventionally, synthetic resin pallet manufacturing methods include an integral molding method using an injection molding machine, and a butt welding molding method in which a divided surface of a pre-divided part is butt-welded to obtain an integrated pallet. There is. One of the latter butt-welding forming methods is a method of dividing a pallet in parallel with a loading surface of a load. FIG. 15 and FIG. 16 show an example of a forming method in which upper and lower two parts obtained by horizontally dividing a four-way pallet are butt-welded together. That is, the pallet 1 is integrally configured by welding the upper part 5 and the lower part 7, which are horizontally divided by a dividing line 4 substantially in the middle of the support column 3 and injection-molded, by abutting the divided surfaces. There is. When such a component is injection-molded, a sprue 8 is provided so as to project on the surface opposite to the dividing surface, that is, the central portion of the luggage mounting surface. Then, the welding method is such that the upper part 5 and the lower part 7 are respectively attached to a pair of opposed vertical pressing plates.
It is fixed in the upright state, and the heating surface provided so as to move back and forth is brought into contact with the welding surface of the component to heat and melt it, and then
The pressing plate is opened, the heating plate is retracted, the pressing plate is brought close again, and the welding surfaces of the upper part 5 and the lower part 7 are brought into contact with each other to be integrated. The sprue 8 is cut with a cutter during welding.

The applicant previously disclosed an example of such a butt welding apparatus in Japanese Patent Application No. 1-195751 (Japanese Patent Laid-Open No. 3-61026). The component carrying-in mechanism that constitutes this welding apparatus is provided with a moving body 31 that moves forward and backward along a guide bar 29 that is horizontally arranged outside the semi-finished product transport units 9 and 11, and the moving body 31 is attached to the moving body 31. A semi-finished product gripper 55 having a pair of holding pieces 57, 59 is attached. The semi-finished product gripping portion 55 is configured to horizontally rotate and escape so as not to interfere with the semi-finished product transporting operation by the semi-finished product transporting portions 9 and 11.
Therefore, the moving body 31 moves forward and the pair of holding pieces 57,
By holding the semi-finished product with 59 and retracting it along the guide bar 29, the semi-finished product is carried to the predetermined position of the semi-finished product transport units 9 and 11 while moving on the roller conveyor 63. Then, the semi-finished product is released from being held by the semi-finished product gripping portion 55 of the moving body 31, and at the same time, the semi-finished product conveying portions 9, 1
1 and is carried into the crimping mechanism 1.

On the other hand, in the crimping mechanism 1, an upper semi-finished product support portion 3 and a lower semi-finished product support portion 5 are disposed so as to be capable of being brought into contact with and separated from each other. The product transport units 9 and 11 are configured to be retractable. The semi-finished product support portions 3 and 5 are driven by a drive mechanism disposed on the lower surface side so as to separate from and contact with each other, and a positioning piece is provided on the opposing front surface in a direction orthogonal to the central portion.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The welding device disclosed in Japanese Patent No. 26 has the following problems. That is, since the semi-finished product gripping portion 55 composed of the pair of gripping pieces 57 and 59 grips the semi-finished product in the standing state from both side surfaces, the inner gripping piece 59 and the semi-finished product conveying section 9,
Only a small distance can be provided between 11 and 11.
Therefore, the holding pieces 57 and 59 are configured to hold the deck board portion forming the fork insertion port, not the column portion of the semi-finished product. That is, since the load carrying surface on which the sprue 8 is protruded for butt welding is the outer side and the supporting column having the welding surface is the inner side, a gap corresponding to the height of the supporting column is formed between the supporting columns to be welded on the inner side. You can

Therefore, the inner holding piece 59 is inserted and held in the gap forming the fork insertion opening between the support columns. In the case of such a gripping method, in the case of a four-way pallet, since the fork insertion opening is formed in both the width direction and the depth direction, it is necessary to grip the deck board part with a gap formed between the support parts. You can However, in the case of a two-way pallet, since the fork insertion port is formed only in one direction, on the side surface where the fork insertion port is not formed, the inside of the space between the semi-finished product and the semi-finished product transport parts 9, 11 is There is a problem that the semi-finished product cannot be gripped because there is not enough space for inserting the holding piece 59.

Further, when the size of the pallet to be welded or the thickness of the deck board portion is changed, the stop position when the moving body 31 moves back and forth or the semi-finished product gripping portion 5 is changed each time.
The distance between the five holding pieces 57, 59 must be adjusted. Further, in general, since the width and depth of the pallet are different, there is a problem that the height position of the moving body 31 must be adjusted depending on which direction the pallet is loaded.

Further, since the drive mechanism for separating and contacting the semi-finished product supporting portions 3 and 5 in the crimping mechanism 1 is disposed on the lower surface side, there is a problem that maintenance and management work thereof is difficult to perform. Further, since the positioning piece for positioning the semi-finished product in the central portion is fixed to the semi-finished product supporting portions 3 and 5, there is a problem that it cannot be used when the shape of the pallet is changed.

The present invention has been made in view of the above situation, and is an improvement of the welding apparatus for a synthetic resin pallet described in Japanese Patent Laid-Open No. 3-61026 disclosed by the applicant. The present invention provides a welding apparatus for synthetic resin pallets, which can sufficiently cope with changes in the type, shape or size of the pallets, and can always be positioned in the center of the pallets. To aim.

[0010]

In order to achieve the above object, the present invention has the following constitution. That is, a crimping mechanism in which a synthetic resin pallet is divided into upper and lower parts and which is butt-welded together in an upright state with an upper part and a lower part, a part loading mechanism for loading both parts into the crimping mechanism, and the part loading A component transfer mechanism that transfers both components to the mechanism, and a heating mechanism that is arranged in the component loading mechanism and the crimping mechanism so as to be retractable.
In a welding device including a pallet unloading mechanism for unloading a pallet after welding is completed, the component transfer mechanism and the crimping mechanism are configured as follows. a. The parts transfer mechanism is composed of a conveyor section and a parts transfer section, which are arranged in parallel adjacent to the outside of the parts transfer mechanism, and further, in a cart which travels on a rail laid parallel to the conveyor section. An elevating table capable of ascending and descending is provided, and a slide plate having a pair of sprue holding pieces rotatably attached to the elevating table is slidably provided in a direction orthogonal to the traveling direction of the carriage. b. The crimping mechanism is composed of an upper component support portion and a lower component support portion that hold the welding surfaces of the components in an upright state, and both of the component support portions are drive mechanisms disposed above ball nuts protruding on the side surfaces. A traveling base that travels in a direction in which the ball screws that rotate with each other are screwed together to move toward and away from each other on the rail, and a plurality of clamp rotations in which the clamps can be attached by sliding in the same direction as the traveling base inside the traveling base. In addition to a clamp holding frame provided with a shaft, the traveling base is detachably attached with a positioning frame for components on the front surface opposite to the traveling base, and a through hole for inserting a sprue is provided on the back side of the through hole. It is equipped with a sprue cutter mechanism.

[0011]

In the component transfer mechanism, the upper component and the lower component are conveyed by the conveyer section and the component conveying section in a state in which the welding surfaces are oriented vertically. The sprue holding piece that holds the sprue projecting from the part can move back and forth, and it is attached to a lift table that can move up and down, so it can respond sufficiently even if the height of the sprue is changed depending on the size of the pallet. . Since the sprue is held and transferred, the centers of the upper and lower parts can be positioned at the center of the parts carry-in mechanism for carrying the parts into the crimping mechanism. Further, since the sprue protruding from the component is held, the component can be transferred even when there is no space for holding the component between the component and the component carry-in mechanism.

Further, since the drive mechanism for driving the upper component support portion and the lower component support portion constituting the crimping mechanism is disposed above each component support portion, the mechanism can be simplified and maintenance is possible.・ Inspection can be done easily. Since the positioning frame for the parts for butt welding is detachably attached to the front surface of each component support, even if the size of the pallet and the position of the through hole for inserting the protrusion are changed, the positioning frame can be replaced by replacing the positioning frame. I can cope enough.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A pallet welding apparatus according to the present invention will be described below in detail with reference to the illustrated embodiments. FIG. 1 is a perspective view for explaining the entire apparatus with a part omitted. First, the outline of the entire apparatus will be described with reference to FIG. A welding device according to the present invention includes a crimping mechanism 100 for holding upper parts and lower parts and welding them by butt welding, and the crimping mechanism 100.
A heating mechanism 101 that can freely appear and disappear in the inside, and the heating mechanism 1
01 is mounted on both sides of 01, and is similarly retractable in the crimping mechanism 100; and a component transfer mechanism 105, which is disposed outside the component transfer mechanism and transfers a component to the component transfer mechanism 103, by welding. Pallet crimping mechanism 1
It is configured by a pallet unloading mechanism 107 that unloads from inside 00.

The crimping mechanism 100 includes an upper component support portion 109 for holding an upper component and a lower component support portion 1 for holding a lower component.
10, both component support portions 109 and 110 are installed so as to be capable of being separated from and contacting each other, and the drive mechanism 1 provided above.
11 is configured to move back and forth in the direction of arrow a. The heating mechanism 101 and the component loading mechanism 103 protruding and retracting between the both component support portions 109 and 110 are configured to move forward and backward in a direction orthogonal to the forward and backward directions of the support portions 109 and 110. Parts loading mechanism 10
3 is composed of an upper component carry-in section 113 and a lower component carry-in section 115, and the components held by the both component carry-in sections 113, 115 are carried into the crimping mechanism 100 and the upper component support section 109 and the lower component support section are respectively provided. Handed over to 110.

When the components are respectively fixed to the upper component support portion 109 and the lower component support portion 110, both the component support portions 109, 109 are introduced into the heating mechanism 101 which is in synchronism with the component carrying-in mechanism 103 or before and after. 110 approaches and melts the welding surfaces of the components, and after melting, both component support portions 109 and 110 open to retract the heating mechanism 101, and approaches again to butt weld both components. When the welding is completed, both component support portions 109 and 110 are opened to hold the integrally molded pallet on one component support portion, and the pallet unloading mechanism 107 carries it out.

On the other hand, the component transfer mechanism 105 carries the components to the component loading mechanism 103. That is, the component transfer mechanism 105 includes the conveyor unit 117 and the component transport unit 11
When the component stands by at the entrance of the conveyor unit 117 with its abutting surface standing in the vertical direction, the component transport unit 119 retreats and grips the sprue 8 protruding from the component. The component is conveyed to a predetermined position of the component loading mechanism 103 in synchronization with the driving of the unit 117. According to the present invention, the component transporting unit 119 grips and transports the sprue protruding from the central portion of the component,
It is characterized in that it can always be positioned at the center position even if the shape and size of the parts are changed.

Next, the structure of each mechanism will be described in detail. In each of the following configurations, the upper component side and the lower component side are basically symmetrical, so the configuration of the upper component side will be described, and the description of the configuration of the lower component side will be simplified. Omit it. First, the configuration of the component transfer mechanism 105 will be described with reference to FIGS. Parts transfer mechanism 10
Reference numeral 5 is composed of a conveyor unit 117 installed adjacent to the outside of the component carry-in mechanism 103 and a component transport unit 119 installed further outside thereof. The conveyor unit 117 is a roller conveyor driven to rotate by a motor (not shown),
Guide plates 120 for guiding the parts are provided upright on both sides.

On the other hand, the parts conveying section 119 is constructed so that it can be moved back and forth along the conveyor section 117 and adjusted according to the height of the sprue to be gripped. That is, the component transfer unit 119
Mounts a motor 125 on a traveling carriage 123 installed via a guide member 122 that engages with a pair of rails 121, and fixes a pinion 127 to a rotation shaft driven by the motor 125. The pinion 127 is the rail. It is configured so as to mesh with a rack 129 laid parallel to the outside of 121. Therefore, since the pinion 127 rotates when the motor 125 is started, the pinion 1
27 and the rack 129 mesh with each other to make the traveling carriage 12
3 moves back and forth on the rail 121.

The bracket 13 is mounted on the traveling carriage 123.
No. 0 is fixed, and an elevating table 131 that is movable up and down with respect to the bracket 130 is provided. That is, the ball screw 133 is attached to a substantially central portion of the bracket 130, and the lift table 131 is attached to the ball screw 133.
The ball nut 135 fixed to is screwed. A handle 137 is fixed to the upper end of the ball screw 133, and the ball nut 135 is inserted into a vertically long through hole 136 cut out in the bracket 130 so that it can be raised and lowered. Further, a pair of dovetail groove members 139 are fixed to the surface of the bracket 130 facing the lift table 131,
On the other hand, a dovetail 140 that is slidably fitted in the dovetail groove member 139 is fixed to the lift table 131. Therefore, since the ball screw 133 rotates when the handle 137 is rotated, the elevating table 131 moves up or down via the ball nut 135 screwed onto the ball screw 133. At this time, since the fixed dovetail 140 is slidably fitted in the dovetail groove member 139, the lifting platform 131 can be raised and lowered in a stable state.

A slide plate 141 is provided on the elevating table 131. That is, a linear guide 145 fixed to the lower surface of the slide plate 141 is engaged with a rail 143 mounted on the lift table 131 in a direction orthogonal to the rail 121. The rod 150 of the cylinder mechanism 149 attached to the attachment plate 147 fixed to the is fixed. Therefore, the slide plate 141 moves back and forth on the rail 143 by driving the cylinder mechanism 149.

A pair of air motors 151 are mounted on the slide plate 141, and a rotating shaft 153 of the air motors 151 is oriented in the same direction as the rails 143 and is supported by bearings 155. A sprue holding piece 157 is fixed to the tip of the rotary shaft 153, and is structured such that the sprue 8 is sandwiched by the air motor 151 being driven while being rotated from the horizontal state to be rotated. Further, a rotation sensor 159 for detecting the rotation of the rotating shaft 153 is attached to the front surface of the bearing 155,
A sprue detection sensor 160 by a photoelectric tube is provided between the rotating shafts 153, 153 (see FIG. 4).

Next, the structure of the component loading mechanism 103 will be described. As shown in FIGS. 1 to 3, the component carrying-in mechanism 103 is composed of an upper component carrying-in section 113 and a lower component carrying-in section 115 which are arranged to face each other so that the heating mechanism 101 can be inserted therein. Since the upper part carry-in part 113 and the lower part carry-in part 115 are symmetrical in configuration, only the upper part carry-in part 113 will be described, and the description of the lower part carry-in part 115 will be omitted. The upper component carrying-in section 113 is a hollow frame body and is composed of a holding frame 161 that abuts the upper component, and a component holding mechanism 163 provided inside the hollow of the holding frame 161. The component holding mechanism 163 is held and fixed by the component holding pieces 169 and 170 which move up and down by the rotation of the shafts 165 and 167.

That is, the shafts 165 and 167 are axially supported in the vertical direction, and gears 171 and 173 are fixedly attached to the opposite ends thereof so as to mesh with the gear 177 fixed to the rotary shaft of the motor 175. Has been done. Parts holding pieces 169, 170 whose tip ends protrude from the front surface of the holding frame 161 are attached to the shafts 165, 167, and guide bars 179 are inserted into both ends of the parts holding pieces 169, 170. There is. Therefore, the motor 17
When 5 is rotated in an appropriate direction, the shafts 165 and 167 rotate via the gears 171 and 173 that mesh with the gear 177, and the component holding pieces 169 and 170 are moved up and down to hold the component while positioning it in the central portion. To do. In this way, since the component holding pieces 169, 170 hold each other while approaching each other in the center direction, they can always be positioned at the center even when the size of the component is changed.

The upper component carrying-in portion 113 and the lower component carrying-in portion 115 having the above-described structure are provided as a pair of traveling carriages 18 provided above.
It is integrated through 0. That is, the traveling carriage 18
0 is a pair of rails 18 by wheels 183 provided on the lower surface.
The upper part carry-in part 113 and the lower part carry-in part 115 are suspended by a support frame 185. Both support frames 185 are connected by a connecting bar 187 for reinforcement. That is, the traveling cart 180 has a chain 189.
The chain 189 is fixed to the rail 181.
Is wound around sprockets 190 provided at both ends of the. The sprocket 190 is configured to be rotationally driven by winding a chain 197 between a sprocket 191 fixed coaxially and a sprocket 195 fixed to a rotation shaft of a motor 193. Therefore, the upper and lower component carry-in units 113 and 115 move forward and backward together with the traveling carriage 180.

Further, the component carrying-in mechanism 103 is provided with a positioning mechanism. That is, a through hole 199 is formed at an appropriate position of the connecting bar 187, and a pair of cylindrical rollers 200 are rotatably supported by the through hole 199 in the longitudinal direction at predetermined intervals. On the other hand, on the rail 181, the cylinder 201 and the cylinder 203 are connected to the rail 181.
The cylinder 20 is arranged so as to be orthogonal to the cylinder 20.
1 rod 205 and cylinder 203 rod 207
Is configured to freely move in and out between the cylindrical rollers 200. Then, the component loading mechanism 103 is positioned by the cylinder 201 at the standby position for loading the component, and the cylinder 203 causes the pressure bonding mechanism 10 to move.
The upper component support portion 109 and the lower component support portion 110 of 0 are positioned at predetermined positions.

Next, the structure of the heating mechanism 101 will be described. As shown in FIG. 3, in the heating mechanism 101, a moving frame 209 having heating plates of known structures on both side surfaces is provided with a traveling carriage 210.
The pressure bonding mechanism 100 and the component loading mechanism 1
It is configured to move back and forth freely within 03. That is, the moving frame 209 has the connecting member 2 provided at the upper end thereof.
It is suspended by fixing 11 to the lower surface of the traveling carriage 210. The connecting member 211 is attached to the upper end of the moving frame 209 by a pin 213 around which a pair of springs 215 are wound. When the components are melted by elastic holding by the springs 215, the connecting member 211 can be swung left and right to adjust the position. . In addition, the traveling carriage 21
In 0, wheels 217 provided on the lower surface travel on a pair of rails 219 provided between the rails 181.

The traveling carriage 210 is driven by a motor 220. That is, a chain 221 is fixed to one of the traveling carriages 210, and the chain 221 is wound around sprockets 223 provided at both ends of the rail 219. The sprocket 223 is a chain 229 wound between another sprocket 225 fixed coaxially and a sprocket 227 fixed to the rotation shaft of the motor 220.
It is driven to rotate by. Therefore, by rotating the motor 220 in an appropriate direction, the chain 229 rotates the sprocket 225 and the sprocket 223 at the same time, so that the chain 2 wound around the sprocket 223 is rotated.
21 moves the traveling carriage 210 forward and backward, and the crimping mechanism 100
Place it in and out (see Fig. 1).

The crimping mechanism 100 is composed of an upper component supporting portion 109 and a lower component supporting portion 110, which are arranged so as to face and separate from each other. The upper part supporting portion 1 based on FIGS. 1 and 6 to 9.
09, and the same reference numerals are given to the common components of the lower component support portion 110, and the description thereof will be omitted. The upper component support portion 109 includes a traveling base 230 that holds components and a clamp holding frame 231 that is slidably incorporated in the traveling base 230. The traveling base 230
The lower surface of the linear guide 2 engaged with a traveling rail 235 laid in a direction orthogonal to the rails 181 and 219.
33 is fixed. Further, ball nuts 237 are fixed to the four corners of the side surface of the traveling base 230, and an upper ball screw 239 and a lower ball screw 240 pivotally supported by a column (not shown) are screwed into the ball nut 237. Therefore, the upper ball screw 239 and the lower ball screw 2
When 40 rotates, the traveling base 230 travels back and forth on the traveling rail 235 via the ball nut 237 that is screwed together.

Next, a drive mechanism for rotating the upper ball screw 239 and the lower ball screw 240 will be described. As shown in FIG. 7, a high speed drive motor 243 and a high speed drive motor 243 are provided on a table plate 241 provided above the upper component support 109. A low speed drive motor 245 is installed. A timing belt 251 is wound around the sprocket 250 of the powder clutch 249 and the sprocket 247 fixed to the rotation shaft of the high speed drive motor 243. Similarly, the sprocket 253 fixed to the rotation shaft of the low speed drive motor 245
A timing belt 259 is wound between the sprocket 257 of the powder clutch 255 and the sprocket 257. further,
The powder clutch 249 and the powder clutch 255
A shaft 263 having sprocket wheels 260 and 261 fixed thereto is installed between and.
A timing belt 267 is wound between the sprocket 261 and the other sprocket 265 of the powder clutch 249, and a timing belt 270 is wound between the sprocket 261 and the other sprocket 269 of the powder clutch 255.

Further, on the table plate 241, a shaft 271 is installed outside the high speed drive motor 243, and on the other hand, a shaft 273 is installed outside the low speed drive motor 245, and sprockets 275, 27 are provided at both ends thereof.
7 and the sprockets 279 and 280 are fixed.
The sprocket 275 is driven by the timing belt 283 wound between the sprocket 281 fixed to the shaft 263, and the sprocket 279 is driven by the timing belt 287 wound between the sprocket 285 fixed to the shaft 263. (Fig. 7
reference).

On the other hand, sprockets 289 and 290 are fixed to the upper ball screw 239 on the high speed drive motor 243 side, and the sprockets 277 and 289 are fixed.
And a timing belt 295 is wound between the sprocket 290 and the sprocket 293 fixed to the lower ball screw 240 below. Further, sprockets 297 and 299 are fixed to the upper ball screw 239 on the low speed drive motor 245 side, and the timing belt 300 is wound between the sprockets 280 and 297 to make the sprocket 2
A timing belt 303 is wound between 99 and a sprocket 301 fixed to a lower ball screw 240 below.

As shown in FIG. 6, a sprocket 305 is fixed to the inside of the sprocket 301 of the lower ball screw 240, and a timing is provided between the sprocket 309 and a sprocket 309 fixed to a shaft 307 extending toward the lower component support 110. The belt 311 is wound. Also, shaft 3
A gear 313 is fixedly attached to the end of the 07 lower component support portion 110 side, and the gear 3 is fixed to the upper shaft 315.
It meshes with 17. Further, the ball nuts 23 are provided on both side surfaces of the lower component support portion 110 similarly to the upper component support portion 109.
7 and an upper ball screw 239 and a lower ball screw 240 that are screwed together with the screw 7, and a sprocket 319 fixed to the shaft 315 and a lower ball screw 23 above.
Timing belt 32 between 9 and sprocket 320
It is made by winding 1.

As shown in FIG. 7, on the table plate 323 provided above the lower part support portion 110, a low speed drive motor 325 for increasing the pressure at the time of melt pressure bonding is installed, and the rotation shaft of the motor 325 is installed. A timing belt 331 is wound between the sprocket 327 and the sprocket 330 of the powder clutch 329, which are fixed to each other. The low speed drive motor 325 is used when it is necessary to increase the pressure at the time of melt pressure bonding depending on the welding area and the type of resin. Further, sprockets 335 and 337 are fixed to the shaft 333, and a timing belt 340 is wound around the sprocket 335 between the sprocket 339 and the other sprocket 339 of the powder clutch 329.
37 is a sprocket 343 of the high pressure brake device 341.
A timing belt 345 is wound between and.

Further, similarly to the upper part supporting portion 109 side, shafts 347 and 349 are installed on the table plate 323, and sprocket 350 and sprocket 350 are provided at both ends, respectively.
351 and the sprockets 353 and 355 are fixed. The sprocket 350 is driven by the timing belt 359 wound around the sprocket 357 fixed on the shaft 333, and the sprocket 353 is driven by the timing belt 361 wound around the sprocket 360 fixed on the shaft 333. .
Similar to the upper part supporting portion 109 side, the sprocket 35
1, a timing belt is wound around the sprocket of the upper ball screw on one side, and the upper ball screw and the lower ball screw on one side are rotated through the wound timing belt. A timing belt is wound between the other upper ball screw sprocket and the sprocket 355 is wound around the other upper ball screw sprocket. Rotate the other upper and lower ball screws through.

Therefore, when the high speed drive motor 243 or the low speed drive motor 245 is operated, the shaft 27 is passed through the timing belt wound around the shaft 263.
1 and 273 rotate, and further, the upper ball screw 239 and the lower ball screw 240 provided on both sides of the upper component supporting portion 109.
Rotates to move the upper component support 109 forward and backward. At the same time, the rotation is transmitted to the shaft 307 so that the lower part support portion 1
Since the upper ball screw 239 and the lower ball screw 240 provided on both sides of 10 are rotated, the lower component support portion 110 is moved back and forth so as to be in contact with and separated from the upper component support portion 109.

At the time of fusion bonding, since the low speed drive motor 325 is simultaneously operating on the table plate 323 above the lower part supporting portion 110, a sufficient rotational force can be applied to the upper ball screw 239 and the lower ball screw 240. Also,
Even after the motor is stopped, the traveling base 230 cannot be stopped suddenly and travels slightly due to inertia, but the high-pressure brake device 341 causes the upper component support portion 109 and the lower component support portion 110 to move to arbitrary positions. It can be stopped. In the above structure, when the traveling base 230 approaches a component or approaches the heating mechanism 101, the high speed drive motor 243 operates to approach a predetermined distance, and then the low speed drive motor 245 is switched to a sufficient pressing force. Is configured to be obtained.

Next, the structure of the traveling base 230 in the upper component support 109 will be described. As shown in FIGS. 8 to 13, on the front surface of the traveling base 230, a positioning frame 363 for positioning the components in the central portion is detachably attached. The positioning frame 363 is a substantially rectangular frame, and a projection 365 is provided on a line orthogonal to the center thereof. The protrusion 365 is inserted into a through hole provided in the component and always holds the component at the center position on the front surface of the traveling base 230. Further, the traveling base 230 is provided with a sprue cutter mechanism 367 at the center of the positioning frame 363.

That is, a through hole 369 into which a sprue can be inserted is formed on the front surface of the traveling base 230, and on the back side of the through hole 369, as shown in FIGS.
Cylinder 371 with cutter 370 installed above it
Is connected to the rod 373 and is configured to reciprocate in the vertical direction. The cutter 370 has a guide shaft 37.
The sliding plate 377, through which 5 is inserted, is fixed. Therefore,
When the cylinder 371 is driven, the cutter 370 fixed to the rod 373 descends while being guided by the guide shaft 375, and cuts the sprue inserted in the through hole 369.
Remove. When the cylinder 371 is driven, it is preferable that the cylinder 371 be moved up and down intermittently so that the cutter 370 bites into the sprue gradually. Further, the sprue cutter mechanism 367 can be appropriately provided depending on the number of sprues.

Further, on the front surface of the traveling base 230, an extruding mechanism 379 for extruding the pallet after welding is provided. As shown in FIG. 8, the pushing mechanism 379 is provided outside the positioning frame 363, and its configuration is
As shown in FIGS. 13 and 14, the abutting plate 380 is fixed to the rod 383 of the cylinder 381, and guide shafts 385 are provided at both ends of the abutting plate 380. Therefore, when the cylinder 381 is driven, the abutting plate 38
Since 0 is pushed out, the held pallet is pushed out. When the pallet unloading mechanism 107 carries out the pallet from the lower part support part 110 holding the pallet formed by integrally welding the upper part and the lower part, the pushing mechanism 379 projects and holds the pallet. Is to be released.

Next, the traveling base 2 will be described with reference to FIGS.
The configuration of the clamp holding frame 231 arranged inside 30 will be described. The components carried into the crimping mechanism 100 are locked by the clamp holding frame 231 and the clamps protruding from the traveling base 230, and are held on the front surface of the traveling base 230 by retracting the clamp holding frame 231 itself. It is something that is fixed. In the clamp holding frame 231,
A clamp mechanism 387 having a clamp protruding from the front surface of the traveling base 230 is arranged. That is, the clamp mechanism 387, as shown in FIG. 9, has the clamp rotation shafts 390 to 397, which support the clamp 389 symmetrically on the front side in the left-right and up-down directions, and the cylinder 399.
Gears 400 and 4 for reverse rotation in the vertical direction
It consists of 01.

Further, the sprocket 403 is attached to the gear 4
00, 401 are fixed coaxially, and the sprocket 405 is also fixed to the clamp rotary shafts 390 to 397 forming one group.
Chain 407 for rotating 03 and 405 simultaneously
Is wound. The rotary shafts 390 to 397 are configured so that the clamps 389 can be attached respectively. However, depending on the shape and size of the pallet, one or more clamps 389 for each group are attached so as to project from the front surface of the traveling base 230. To be As in the above configuration, the clamps that fix the pallet can be attached to each clamp rotation axis, so the shape and size of the pallet can be adjusted by appropriately changing the number of clamps and the mounting position. Can have Incidentally, 410 is an adjusting sprocket for adjusting the tension of the chain 407.

The rod 409 of the cylinder 399 is fixed to one of the rotating shafts, that is, the rotating shaft 393 in this embodiment, so that the driving of the cylinder 399 causes the rotating shaft 39 to rotate.
3, that is, the sprocket 403 coaxial with the gear 400 and the sprocket 405 of the clamp rotation shafts 390 to 397 rotate integrally. When the sprocket 403 rotates, the gear 401 meshing with the gear 400 also rotates, so that the sprocket 403 and the clamp rotation shaft 39 of the upper group are rotated.
The sprocket 405 of 0-397 rotates integrally. Thus, in the left half of FIG. 9, when the sprocket 393 is rotated in the appropriate direction via the rod 409 of the cylinder 399, it is transmitted to all the sprockets by the chain 407, and the attached clamp 389 rotates by a predetermined amount. . At this time, the groups in the upper and lower parts are rotated in opposite directions by the gears 400 and 401, and the clamp 389 engages the parts.

As described above, the clamp holding frame 231 having the clamp mechanism 387 is slidably arranged in the traveling base 230 as shown in FIG. That is, the sliding rings 41 are provided on the left and right sides of the lower surface of the clamp holding frame 231.
1 is fixed, and a pair of shafts 413, both ends of which are fixed to the traveling base 230, are inserted into the sliding ring 411. Therefore, the clamp holding frame 231 is attached to the shaft 4
It is erected in 13 so that it can move back and forth. On the other hand, the clamp 38
A rod 417 of a cylinder 415 attached to the traveling base 230 is fixed to the back surface of the ninth holding frame 231.

A cylinder 415 is used to hold and fix the parts.
Is driven to move the clamp holding frame 231 forward while sliding along the shaft 413, and the clamp 389 attached to the clamp rotating shaft is projected from the front surface of the traveling base 230 by a predetermined amount. Next, the cylinder 399 is driven to rotate the chain 407. When the chain 407 rotates, the clamp rotation shaft rotates, and the attached clamp 389 rotates to engage the parts. In this state, when the cylinder 415 is driven to retract the clamp holding frame 231, the clamp 389 naturally retracts.
9 holds the deck board part of the component on the front surface of the traveling base 230.

As described above, by sandwiching and fixing the components on the front surface of the traveling base 230, it is possible to press the heating mechanism 101 and weld the components by butt welding. On the other hand, in order to release the clamped and fixed component after the completion of welding, the clamp holding frame 231 is moved forward, the clamp 389 is reversely rotated by the cylinder 399 to release the engaged state, and the clamp holding frame 231 is retracted again. Good. By retreating the clamp holding frame 231, it is possible to take out the pallet which is fused and integrally completed. further,
When carrying out the pallet by the pallet carrying-out mechanism 107, at the same time as releasing the holding by the clamp mechanism 387,
The pallet is pushed out by the pushing mechanism 379.

Next, the structure of the pallet unloading mechanism 107 will be described. The traveling carriage 18 of the component loading mechanism 105
A moving carriage 419 is provided on a pair of rails 181 on which 0 travels. The movable carriage 419 is configured to be movable and movable by engaging a linear guide fixed to the lower surface with the rail 181. And the moving carriage 4
19 and the support frame 185 of the component carrying-in mechanism 103 are integrally connected by a connecting rod 421. Therefore, the moving carriage 419 and the component carrying-in mechanism 103 always advance and retreat integrally at a constant interval. That is, when the component loading mechanism 103 is on standby for loading components, the pallet unloading mechanism 1
When the pallet 07 is in the crimping mechanism 100, the pallet that has been welded is received from the traveling base 230, and when the component carry-in mechanism 103 holds the component and carries it into the crimping mechanism 100, the pallet carry-out mechanism 107 carries out the received pallet. Is configured to.

A substantially U-shaped vertical plate 423 having a substantially central portion cut out is fixed to the side surface of the movable carriage 419, that is, to the lower component support portion 110 side of the crimping mechanism 100,
A pair of ball screws 427 with which ball nuts 425 are screwed are vertically supported on both sides of the back surface of the vertical plate 423. An elevating plate 429 is integrally mounted on the ball nut 425 so as to sandwich the vertical plate 423.
An openable and closable arm for holding a pallet is attached to the elevating plate 429.

Having described in detail the respective constitutions of the above-mentioned apparatus, the usage of the above-mentioned apparatus will be described below. First, the motor 193 and the motor 220 are operated to retract the heating mechanism 101 and the component loading mechanism 103 to the component loading position and wait, and the motor 125 is activated to retract the component transfer mechanism 105 and wait at a predetermined position. . At this time, the component transfer mechanism 105 adjusts the height and standby position of the sprue holding piece 157 according to the size of the component. Next, the upper part 5 and the lower part 7 molded by the injection molding machine
Are placed on the conveyor part 117, and the upper part carry-in part 113 and the lower part carry-in part 1 are respectively driven by the conveyor part 117.
15 is transferred inward. When the transferred sprue 8 of the upper and lower parts reaches above the part conveying section 119, the sprue sensor 160 provided between the sprue holding pieces 157 detects the stop and stops the driving of the conveyor section 117.

When the conveyor section 117 is stopped, the air motor 151 is operated to hold the sprue 8 by the sprue holding piece 157. When the air motor 151 is stopped by holding the sprue 8, the motor 125 and the motor of the conveyor unit 117 are activated to simultaneously convey the upper and lower parts 5 and 7 to the centers of the upper part carry-in part 113 and the lower part carry-in part 115, respectively. Stop. When the movement of the component transport unit 119 is stopped, the air motor 151 is operated again to rotate the sprue holding piece 157 to a substantially horizontal position to release the holding of the sprue 8. Next, the motor 17 of the component holding mechanism 163 in the upper component loading unit 113 and the lower component loading unit 115.
5 is operated to hold the components 5 and 7 from the vertical direction by the component holding pieces 169 and 170 and hold them on the holding frame 161.
When the components 5 and 7 are held, the motor 193 is operated to move the component loading mechanism 103 along the rail 181, and the upper component support portion 109 and the lower component support portion 110 of the crimping mechanism 100.
Bring in until. At this time, the heating mechanism 101 is also connected to the rail 219 before or after the component carrying-in mechanism 103.
The upper part supporting portion 10 of the crimping mechanism 100.
9 and the lower part support 110.

Next, the upper part supporting portion 10 of the crimping mechanism 100.
9 and the lower part support portion 110 are moved relative to each other and brought into contact with the respective parts, and the projection 365 of the positioning frame 363 attached to the front surface is inserted into the through holes of the upper and lower parts 5 and 7 to place the parts in the central portions. Position. At the same time as the positioning, the sprues 8 of the upper and lower parts 5 and 7 are respectively passed through the through holes 36.
Inserted in 9. Upper component support 109 and lower component support 1
When the forward movement of 10 is stopped and the positioning of the component is completed, the clamp rotation shafts 390 to 397 are rotated by the cylinder mechanism 399 of the clamp holding frame 231, and the clamp 389 attached at a predetermined position is rotated inside the component. . After that, when the traveling base 230 is retracted, the clamp 3
Since 89 also retracts integrally, the upper component 5 is fixed to the front surface of the upper component support portion 109 and the lower component 7 is fixed to the front surface of the lower component support portion 110 by the clamp 389.

At the same time that the protrusion 365 of the positioning frame 363 is inserted into the through hole of the component to be positioned, the component holding pieces 169, 1 of the upper component carrying-in portion 113 and the lower component carrying-in portion 115 are arranged.
The holding of the components 5 and 7 by 70 is released. The upper component carry-in portion 113 and the lower component carry-in portion 115, which have released the holding of the component, return to their original positions to prepare for the next component carry-in. Component loading mechanism 1 including upper component loading unit 113 and lower component loading unit 115
03 and the pallet unloading mechanism 107 are connected by a connecting rod 421, the pallet unloading mechanism 107 is moved to the crimping mechanism 1 by returning the component loading mechanism 103 to the standby position.
It is waiting in 00.

After cutting the sprue 8, the upper part support 109
Then, the lower part support portion 110 is brought close to a predetermined amount to bring the abutting surfaces of the upper part 5 and the lower part 7 into contact with the heating mechanism 101.
At this time, the upper component supporting portion 109 and the lower component supporting portion 110 are brought close to each other by a certain amount by driving the high speed driving motor 243, and then switched to the low speed driving motor 245 to heat the heating mechanism 101.
Gradually press. In this state, heating is performed by the heating mechanism 101 to melt the abutting surfaces of the upper part 5 and the lower part 7. On the other hand, during melting by the heating mechanism 101, the cutter 30 of the sprue cutter mechanism 367 is operated to cut and remove the sprue 8 inserted into the through hole 369.

After the abutting surfaces of the upper part 5 and the lower part 7 are melted by a predetermined amount, the upper part supporting part 109 and the lower part supporting part 11
0 is moved backward by the operation of the high speed drive motor 243, and at the same time, the heating mechanism 101 is returned to its original position. Again, the upper component support 109 and the lower component support 11
0 is brought close to each other and butt-welded together to manufacture an integrally completed pallet. After the welding is completed, the holding by the clamp mechanism 387 on the upper part supporting portion 109 side is released to retreat,
The completed pallet is held on the lower part support portion 110 side. In addition, when stopping the contact / separation movement of the upper component support portion 109 and the lower component support portion 110, the high pressure brake device 341 is used.
Prevent overshooting. Since the upper and lower parts are positioned with reference to the center position, even if there is a dimensional difference due to contraction between them, the dimensional difference is evenly distributed on the outer peripheral part and a large displacement occurs in the welded part position on the completed pallet. There is no such thing. Therefore, it is possible to improve welding quality and to have sufficient versatility. Next, the pallet unloading mechanism 107 unloads the pallet. At the same time that the pallet is carried out, the component carrying-in mechanism 103 carries the upper and lower parts 5 and 7 into the crimping mechanism 100. The same cycle is repeated thereafter to weld the components.

In the above embodiment, the case where the sprue-8 is provided at the central portion of the upper and lower parts has been described, but a plurality of sprues can be provided so as to be displaced from the central portion. In this case, the number of sprue cutter mechanisms may be increased according to the position of the sprue. When the sprue is displaced from the center, a dummy protrusion similar to the sprue is formed in the center of the upper and lower parts, and the dummy protrusion is held by the sprue holding piece 157 of the component transfer mechanism 105. Good. The dummy protrusion may be cut and removed during melting by the heating mechanism 101 by the sprue cutter mechanism at the same time as the sprue.

As is apparent from the above description, the above-described embodiment has the following effects. First, since the upper and lower parts are always handled in an upright state, the space required for operation is small, the entire apparatus can be downsized, and the space can be effectively used. Further, since the parts are positioned at the central position, even if a dimensional difference occurs between the upper part 5 and the lower part 7 due to deformation during molding or after molding, this dimensional difference can be evenly distributed to both sides. . Therefore, the displacement of the welding position can be reduced as compared with the case where the positioning is performed on the basis of one surface. further,
Since the positioning frame 363 is detachably attached, it can be replaced according to the size of the pallet and the position of the through hole into which the protrusion 365 is inserted.

Upper part carrying-in section 113 and lower part carrying-in section 115
The upper and lower parts are carried into each of the upper and lower parts by the side-by-side parts transfer mechanism 103, so that the sprue 8 can be transferred even when there is almost no gap between the parts and the upper and lower parts carry-in parts 113 and 115. Is possible. Further, since the upper component support portion 109 and the lower component support portion 110, which form the crimping mechanism 100, are connected by the shaft 307, they can be contacted and disengaged at the same time and at the same distance, and a drive mechanism such as a drive motor. Since the is placed above, maintenance and inspection can be performed easily. Further, since the high-pressure brake device is provided, it is possible to prevent the upper component support portion 109 and the lower component support portion 110 from overshooting due to inertia and stop them at predetermined positions.

Since the pallet carrying-out mechanism 107 holds the pallet supporting columns, not only can the device be made smaller and the space can be effectively utilized, but the pallet size is changed because the central supporting column is held. But you can always hang it in the center.

【The invention's effect】

Since the conveyor unit 117 transfers the parts in an upright state, and the component carrying-in mechanism 105 holds the sprue protruding from the parts, the claws held between the parts carrying-in unit like a two-way pallet. Even if there is not enough space to insert the parts, the parts can be transferred. Further, since the sprue is generally provided in the central portion of the component, the stop position can always be kept constant even if the size of the component is changed only by adjusting the height of the sprue holding piece.

Further, since the positioning frames in the upper component supporting portion and the lower component supporting portion of the crimping mechanism are detachably attached,
Even if the position of the through hole of the component is changed, it can be dealt with.
Further, since the drive mechanism is arranged above, the mechanism can be simplified and maintenance / inspection can be easily performed.

[Brief description of drawings]

FIG. 1 is a perspective view for explaining the entire device with a part omitted.

FIG. 2 is a side view for explaining a component loading mechanism and a component transfer mechanism.

FIG. 3 is a sectional view for explaining a component loading mechanism and a component transfer mechanism.

FIG. 4 is a plan view of a component transfer mechanism.

FIG. 5 is a perspective view of the component transfer mechanism of the same.

FIG. 6 is an explanatory sectional front view in which a part of the crimping mechanism is omitted.

FIG. 7 is a plan view for explaining the same driving method.

FIG. 8 is a side view for explaining an upper component supporting portion of the crimping mechanism.

FIG. 9 is an explanatory diagram showing a clamp mechanism and a driving method.

FIG. 10 is a partial cross-sectional front view of the upper component support portion of the crimping mechanism.

FIG. 11 is a side view of the sprue cutter mechanism.

FIG. 12 is a rear view of the sprue cutter mechanism.

FIG. 13 is a side view of a pallet pushing mechanism.

FIG. 14 is a front view of an extrusion mechanism of the same.

FIG. 15 is a front view of a pallet in which upper and lower parts are welded.

FIG. 16 is an explanatory perspective view of the upper and lower parts in which sprues are projected and which are overlapped and before welding.

[Explanation of symbols]

 100 Crimping Mechanism 101 Heating Mechanism 103 Component Loading Mechanism 105 Component Transfer Mechanism 107 Pallet Export Mechanism 109 Upper Component Support 110 Lower Component Support 111 Drive Mechanism 113 Upper Component Import 115 Lower Component Import 117 Conveyor 119 Component Transport 120 Guide Plate 121 Rail 123 Traveling dolly 125 Motor 130 Bracket 131 Elevating platform 133 Ball screw 135 Ball nut 139 Dovetail groove member 140 Dovetail 141 Sliding plate 143 Rail 149 Cylinder mechanism 151 Air motor 157 Sprue holding piece 161 Holding frame 163 Parts holding mechanism 169 170 Parts Holding Pieces 171 Gears 173 Gears 175 Motors 177 Gears 179 Guide Bars 180 Traveling Bogies 181 Rails 183 Wheels 185 Support Frames 187 Connecting Bars 189 Chain 190 Sprockets 191 Sprockets 193 Motors 195 Sprockets 197 Chains 199 Through holes 203 Cylinders 209 Moving frames 210 Traveling carriages 211 Connecting members 217 Wheels 219 Rails 220 Motors 221 Chains 223 to 227 Sprockets 229 Chains 230 Traveling carriages 2 2 Guides 23 2 231 Clamps 231 Traveling rail 237 Ball nut 239 Ball screw 240 Lower ball screw 243 High speed drive motor 245 Low speed drive motor 249 Powder clutch 251 Timing belt 255 Powder clutch 259 Timing belt 267 Timing belt 270 Timing belt 283 Timing belt 287 Timing belt 291 Timing belt 295 Timing bell 300 Timing Belt 303 Timing Belt 307 Shaft 313 Gear 317 Gear 321 Timing Belt 325 Low High Speed Drive Motor 329 Powder Clutch 331 Timing Belt 333 Shaft 340 Timing Belt 341 High Pressure Braking Device 345 Timing Belt 347 Shaft 349 Shaft 359 Timing Belt 363 Positioning Belt 361 Frame 365 Protrusion 367 Sprue cutter mechanism 369 Through hole 370 Cutter 371 Cylinder 379 Extrusion mechanism 381 Cylinder 387 Clamp mechanism 389 Clamp 390 to 397 Clamp rotating shaft 400 Gear 401 Gear 407 Chain 411 Sliding ring 413 Shaft 415 Cylinder 419 Moving carriage 423 Vertical plate 42 5 Ball nut 427 Ball screw 429 Lift plate

Claims (1)

[Claims] 1. A crimping mechanism for butt-welding an upper part and a lower part, which are obtained by vertically dividing a synthetic resin pallet into two parts, and a component carrying-in mechanism for carrying both parts into the crimping mechanism. A welding device including a component transfer mechanism that transfers both components to the component transfer mechanism, a heating mechanism that is retractably arranged in the component transfer mechanism and the pressure bonding mechanism, and a pallet unload mechanism that unloads the pallet after completion of welding. At
The component transfer mechanism and the crimping mechanism are configured as follows. a. The parts transfer mechanism is composed of a conveyor section and a parts transfer section, which are arranged in parallel adjacent to the outside of the parts transfer mechanism, and further, in a cart which travels on a rail laid parallel to the conveyor section. An elevating table capable of ascending and descending is provided, and a slide plate having a pair of sprue holding pieces rotatably attached to the elevating table is slidably provided in a direction orthogonal to the traveling direction of the carriage. b. The crimping mechanism is composed of an upper component support portion and a lower component support portion that hold the welding surfaces of the components in an upright state, and both of the component support portions are drive mechanisms disposed above ball nuts protruding on the side surfaces. A traveling base that is screwed by a ball screw and travels in a direction in which the balls move away from and contact each other on the rail, and a plurality of clamp rotations in which the clamps can be attached by sliding in the same direction as the traveling base inside the traveling base. It consists of a clamp holding frame with a shaft, and
In the traveling base, a positioning frame for components is detachably attached to the front surface facing each other, a through hole for inserting a sprue is provided, and a sprue cutter mechanism is provided on the back side of the through hole.