JPS6212017B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a welding device, and more specifically,
The present invention relates to a welding device used to weld and join synthetic resin molded products into a finished molded product.

It has been conventional practice to obtain products by welding multiple synthetic resin molded products (hereinafter simply referred to as molded products), such as molded products by injection molding or extrusion molding, to each other, and various methods are used depending on the product. Structure welding equipment is used.

Generally, this type of welding device includes a holding mechanism using a suction cup or the like that holds the molded products to be welded facing each other, a heating mechanism that melts the welding surface of the molded product, and a molding device that melts the welding surface. It consisted of a pressing mechanism that butts and presses the items to join them.

However, with such conventional welding equipment, as the molded products to be welded themselves become larger and the welding surfaces become narrower, differences in warpage or shrinkage between molded products occur, resulting in misalignment of the joint surfaces. However, this method had the disadvantage of causing a decrease in the strength of the welded part.

In order to solve these conventional drawbacks, in place of the conventional holding mechanism using a suction cup or the like, we developed a mechanism for holding the molded product that has an internal shape that is substantially the same as the external shape of the molded product, but with slightly smaller dimensions. A holding frame having a shape is provided on the surface of the pressing plate of the pressing mechanism, and the holding frame compresses and holds the molded product to the same size and welds it, and after welding, a protruding member for pushing out the molded product from the holding frame is attached. It was planned to install it within the holding frame.

However, according to this improved welding device, the molded product to be welded must be placed in a predetermined position in the welding device, that is, within the holding frame, by hand because the holding frame is provided. In this case, there is a lack of speed in feeding the molded product to the predetermined position of the welding device, which inevitably reduces production efficiency, and above all, the existence of such artificial discontinuous work hinders automation. This is not desirable.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a welding device that is equipped with a holding frame that accommodates and holds objects to be welded, and is capable of automatically feeding objects to be welded into the holding frame of the welding device. It is about providing.

To summarize the welding device of the present invention, the welding device includes a pair of holders that are arranged vertically facing each other and that can be approached and separated from each other in order to respectively accommodate and hold the welded objects to be welded and welded. In the welding device, the welding device includes a heating plate that is provided so as to be able to move in and out through the gap when the respective holding devices are separated, wherein each of the holding devices is provided on a pressing plate and a side where the pressing plates face each other. a holding frame having an internal shape that is substantially the same as the external shape of the object to be welded but slightly smaller in size, and having an inclined surface that opens outward on the inside surface, The apparatus is provided with a protruding member that protrudes from the press plate of each holding device in order to push out the welded object from each of the holding devices after welding, and among the projecting members, the protruding member provided on the lower holding device is , the object to be welded housed in the lower holding device is supported on the holding device before welding, and in order to push out the object to be welded from the holding device after welding, the object to be welded is pushed out from inside the holding device. It is characterized in that it can protrude at the same level as or higher than the upper surface of the holding frame.

Hereinafter, the welding apparatus of the present invention will be explained in more detail with reference to preferred embodiments shown in the accompanying drawings. Note that this example shows a welding device used to form a pallet as an example of a synthetic resin molded product,
Therefore, in the following description, the synthetic resin molded product will be simply referred to as a pallet.

In FIG. 1, a welding apparatus according to the present invention is generally designated by the reference numeral 10. This welding device 10 includes a pair of holding devices 11a and 11b that are vertically spaced apart and facing each other, and a heating plate 12 that is provided so as to be able to go in and out within this space (see FIG. 16).
and protruding members 13a, 13b arranged inside each of the holding devices 11a, 11b.

Each of the holding devices 11a, 11b includes a press plate 14 and a holding frame 15 provided on the press plate. The holding frame 15 is designed to have an internal shape that is substantially the same as the external shape of the pallet 16, which is formed by overlapping and welding two semi-molded products that are divided into two halves on one side, the upper and lower sides, but slightly smaller in size. It is formed. Further, the holding frame 15 is formed into an inclined surface that opens outward at a connecting portion between the distal end surface and the inner surface, that is, at a partition edge.

This structure of the holding frame 15 is similar to that of the pallet 16.
This is preferable for smoothly press-fitting the half part into the holding frame 15, and is also effective in compressing the half part to a specified dimension and preventing misalignment of the two halves due to warping or shrinkage. be.

The holding devices 11a and 11b are connected to the support frame 18 via cylinder devices 17a and 17b, respectively.
is attached to. As a result, the holding devices 11a and 11b can be moved toward and away from each other by the operation of each cylinder device. At this time, a guide rod 19 is attached to each holding device 11a, 11b in order to move the holding devices 11a, 11b accurately and stably in a predetermined direction, that is, in the present embodiment, in the vertical direction.

Further, each of the horizontal beams 20a, 20b in both the upper and lower parts of the support frame 18 has a plurality of protruding rods 21a, 2 constituting a protruding member.
1b is erected. The protruding rod 21b attached to the upper beam 20b is the piston rod of the cylinder device 22 fixed to the beam 20b and is therefore itself movable. On the other hand,
A protruding rod 21 attached to the lower beam 20a
a is a rod fixed to the support frame 18; These upper and lower protruding rods 21a and 21b are inserted into the holding frame through holes 23 formed in the pressing plate 14 of each holding device 11a and 11b, as shown in FIGS. 1 and 2a and 2b. 15.

In particular, the protruding rod 21a is connected to each holding device 11a, 1
1b has a length dimension such that its upper end is the same as or higher than the upper surface of the holding frame 15 when it is in the state of receiving the unwelded pallet 16 with maximum separation (the state shown in FIG. 1). be taken as a thing. The upper end of each protruding rod 21a on the side where the pallet 16 enters the welding device 10 is chamfered.

According to such a protruding rod 21a, a set of pallets 16 can be sent between the separate holding devices 11a and 11b of the welding device 10 from a supply source 24 loaded with unwelded pallets 16, which will be described later, and supplied as needed. When feeding, since the protruding rods 21a protrude higher than the upper surface of the holding frame 15 in the holding device 11a, the welding device 10 is slid and placed on the plurality of protruding rods 21a from the side of the welding device 10 without using the holding frame as an obstacle. be able to. Moreover, since the upper edges of the protruding rods 21a are chamfered on the entry side of the pallet 16, each protruding rod 21a and the bottom edge of the side wall in the advancing direction of the pallet 16 can slide quickly without colliding face-to-face.

The unwelded pallet 16 thus placed on the protruding rod 21a is placed in a position aligned with the holding frame 15 by the positioning device 25. Then,
This positioning device 25 is removed from between the holding devices 11a and 11b as described later, and the holding device 11a is removed from between the holding devices 11a and 11b.
is raised by the cylinder device 17a, and at the same time, the holding device 11b is also lowered by the cylinder device 17b, so that the holding devices approach each other. At this time,
As the holding device 11a rises, the protruding rod 21a relatively comes out of the holding frame 15,
Therefore, the pallet 16 is held in each holding device 11a, 11
It is press-fitted into the holding frame 15 by the approach thrust of b. That is, the lower half of the pallet 16 is press-fitted into the holding frame 15 of the holding device 11a, and the upper half of the pallet 16 is press-fitted into the holding frame 15 of the holding device 11b.

Next, among the holding devices 11a and 11b which press-fit and hold each half of the pallet 16, only the upper holding device 11b is raised and returned to its original position, that is, the position shown in FIG. 1, by the operation of the cylinder device 17b. The reason for this is that the lower holding device 11
This is because when a is lowered, the protruding rod 21a enters into the holding frame 15 as a relative movement and pushes out half of the pallet 16.

Once the two halves of pallet 16 are separated in this manner, heating plate 12 (FIG. 16) is moved and placed between them. Then, the lower holding device 11a is further raised and the upper holding device 11b is lowered so that the joining surface of the half portion of the pallet 16 comes into contact with the heating plate 12. As a result, the joint surfaces of each half of the pallet 16 that are in contact with both sides of the heating plate 12 are melted, and then the heating plate 1
2, and at this time the heating plate 12 returns to its original standby position. Then, only the upper holding device 11b is lowered to bring both halves of the pallet 16 into contact with each other, and the thrust of the cylinder device 17b and the other cylinder device 17a are applied via the bottom plate serving as the pressing plate 14 of each holding device 11a, 11b. A relative pressing force, that is, a pressing force is applied to both halves by the supporting force.

As a result, both halves of pallet 16 are welded together. After that, the upper holding device 11b
The protruding rod 21b, which had been moved together, is made immobile by the cylinder device 22, and the holding device 11
Increase only b. As a result, the protruding rod 21b
relatively enters the holding frame 15 and the pallet 16
This will push out the The lower retaining device 11a is then also lowered, so that the relative protruding rod 21a
By entering the holding frame 15, the pallet 16 is pushed out. Of course, in reality, the welded pallet 16 remains stationary on the protruding rod 21a, and only its holding frame 15 descends and returns to its initial position.

For this reason, the welded pallet 16
is a protruding rod 21a that is the same as or higher than the upper surface of the holding frame 15 in the holding device 11a.
Since the welding material is carried by the welding device 10, it is pushed out by the next unwelded pallet 16 and moved to the side discharge side of the welding device 10 without any hindrance.

The above is the overall operation of this welding device 10, but possible modifications based on such operation and details of other components will be explained below.

3a, b to 5 a, b show a modification of the projecting member provided on the transverse beam 20a of the support frame 18, which extends through the pressing plate 14 of the lower holding device 11a mentioned above. It shows.

In the modification shown in FIGS. 3a and 3b, the pressing plate 14
Support plates 26, which are long in the pallet advancing direction, are attached to the upper ends of two of each of a plurality of protruding rods 21a extending through a plurality of holes 23 formed in the pallet. The upper edge of each support plate 26 on the pallet entry side is chamfered. Further, on the surface of the pressing plate 14, a protruding rod 21a serving as a protruding member is provided.
A recess 27 is formed in a shape that can completely accommodate the support plate so as to flatten the surface of the press plate when the support plate 26 is relatively pulled in from above the press plate. In this case, the protruding rod 21a and the support plate 26 are
After the pallet 16 is press-fitted into the holding frame 15,
Since it is necessary to move together with the pressing plate during the melting and welding process of the pallet 16, the protruding rod 21a is movable in the horizontal direction beam 20a (cylinder mechanism, etc.).
established in

The modification shown in FIGS. 4a and 4b is based on the third
The support plates 26 in the modified example shown in FIGS. a and b are not plural but one support plate 28 supported by all the protruding rods 21a. In this case as well, the upper edge of the support plate 28 on the pallet entry side is chamfered to form an inclined surface.
Such a support plate has the advantage that the pallet is less likely to be damaged because the surface for supporting the pallet is wide. In this case too, the projecting rod 21a is movably mounted on the transverse beam 20a for the same reasons as in FIG.

Furthermore, in the modified example shown in FIGS. 5a and 5b, a plurality of protruding rods 21a extending through holes 23 formed in the pressing plate 14 are formed hollow near their tips, and the hollow portions are hollow. A spring member 29 is disposed, and a spherical member 31 that acts as a bearing is press-fitted into a small diameter opening 30 formed at the tip end of the spring member 29 and held therein. According to the protruding rod 21a having such a configuration, the functions of receiving the pallet from the side and supporting it are more effective than those of the above-mentioned modifications due to the sliding action of the spherical surface and the shock-absorbing action of the spring. It is demonstrated. Especially when pushing out the pallet from the holding device, the protruding rod 21a
The spherical member 31 is pushed by the pallet by the relative protruding force of the pallet and sinks into the hollow portion against the spring 29, whereby the tip surface of the protruding rod 21a comes into contact with the pallet and can push it out. .

Next, FIGS. 6a and 6b show the steps explained in FIG. 1.
Holding device 1 in welding device 10 for holding pallet 16
Device 2 for positioning at a predetermined position between 1a and 11b
5 configurations are shown. This positioning device 25
are provided symmetrically in pairs on the front side and back side of the welding device 10 in FIG. However, since the pair of positioning devices 25 have the same configuration, the positioning device 2 disposed on the front side
5 will be explained.

The positioning device 25 is the protruding rod 2 of the welding device 10.
A pair of holding parts 32 are arranged on both sides so as to hold the pallet 16 fed onto the pallet 1a between the front side and the back side as seen in FIG. The holding portion 32 is a vertical plate-like member parallel to the side wall of the pallet 16 and extends along the side wall. A slot 33 extending in the longitudinal direction is formed in such a clamping part 32, and a stop member 34 having an L-shaped cross section is provided on the inside of the clamping part 32, that is, on the side opposite to the other clamping part, by a bolt through the slot 33. Fixed.

This clamping part 32 has an arm 36a formed integrally with it and pivotally supported by a pivot 35 in order to open the clamping part 32 away from the pallet so as not to interfere with the next process when the pallet 16 is positioned. This pivot 35 is arranged on a base plate 37 which is mounted in place on the support frame 18 on the pallet discharge side of the welding device 10. However, at this time, the position of the central axis of the pivot 35, that is, the chain line 38 drawn through the central axis in the pallet feeding direction, is the position of the flange portion 3 extending inwardly of the stop member 34.
It must be inside the edge of 9. this is,
If the central axis of the pivot 35 is located outside the end of the flange 39, when the clamping part 32 pivots around the pivot 35 to the open position, the flange 39 will have a rotational trajectory that pushes back the pallet. The purpose is to draw.

Such pivoting of the clamping part 32 is caused by an arm 36b extending in a V shape with respect to an arm 36a pivotally supported on a pivot shaft 35 to a piston rod 41 of a cylinder device 40 mounted on a base plate 37. This is caused by the operation of the cylinder device 40, which is pivotally mounted. Support frame 1 for base plate 37
8, a plurality of slots 42 extending in the width direction of the pallet (a direction transverse to the direction of movement of the pallet) are formed in the base plate, and the support frame 18 is screwed through the slots 42. It depends on the tightening force of the bolts. The presence of the slot 42 formed in the base plate 37 and the slot 33 formed in the clamping portion 32 is adapted to accommodate the size of the type of pallet. That is, movement of the base plate 37 along the slot 42 adjusts the opposing spacing of the stop members 34 (corresponding to the width of the pallet) and the movement of the stop member 34 along the slot 33
Movement along the pallet can precisely adjust the stopping position of the pallet (corresponding to the length of the pallet).

Next, FIGS. 7a and 7b show an unwelded pallet 16.
A fixing device 43 is shown which secures one half of the pallet 16 within each retaining frame 15 for safety when it is press-fitted into the retaining frame 15 of the retaining device 11a, 11b.

This fixing device 43 includes a locking piece 45 that can protrude laterally into a partitioned area of the holding frame 15 through an opening 44 made in the side of the holding frame 15. The movement is caused by a first link whose each end is pivotally connected to a piston rod 47 of a cylinder device 46 mounted on the side surface of the pressing plate 14 on which the holding frame 15 is mounted, and a locking piece 45. In order to move the member 48a and the pivoted end of the first link member 48a to the locking piece 45 approximately linearly, one end is pivoted to the middle of the link member 48a, and the other end is pivoted to the press plate 14. The second link member 48b
It is done by.

As a result, the unwelded pallet 1 is placed inside the holding frame 15.
When the half part of 6 is press-fitted, the cylinder device 4
6 is activated and the first and second link members 48
a and 48b are moved to make the locking piece 45 protrude from the opening 44 of the holding frame 15 and insert it into the fork insertion hole of the pallet 16. As a result, the half of the pallet press-fitted into the holding frame 15 does not come out of the holding frame.

8 and 9 show a modification of the fixing device 43 described above. In the fixing device 43 shown in FIG. 8, the locking piece 45 has an L shape when viewed from above,
One end thereof is fixedly connected to one end of the link member 49, and the connecting portion 50 is pivotally supported with respect to the pressing plate 14. On the other hand, the other end of the link member 49 is
A pin 52 provided at the tip of the piston rod 47 of the cylinder device 46 is slidably inserted into the slot 51 formed in the longitudinal direction, and is made swingable by the operation of the piston cylinder device 46. Furthermore, the fixing device 43 shown in FIG.
is the locking piece 4 in the device 43 shown in FIG.
This is an example when No. 5 is made vertical, and its configuration is the same as No. 8.
It is substantially the same as that shown.

In the fixing device 43 shown in FIGS. 8 and 9, the locking piece 45 swings around the connecting portion 50 due to the operation of the cylinder device 46, and its tip is attached to the side opening of the holding frame 15. Entering and exiting from Department 44,
It is inserted into the fork insertion hole of the pallet 16.

10 and 11 show the detailed structure of the holding frame 15 arranged on the pressing plate 14. As shown in FIG. As is clear from this figure, the size of the rectangle is adjusted by linearly moving each side member of the holding frame 15 arranged in a rectangular shape while maintaining a mutual intersection angle of 90 degrees. A plurality of slots 53 are formed which act as guides for changing the angle. A pin 54 is passed through each side member of the holding frame 15 from the top surface and extends into the slot 53. As a result, the holding frame 15 can change the size of the partitioned area while always maintaining its rectangular shape in accordance with the size of the pallet press-fitted into the partitioned area.

The movement of each side member in the holding frame 15 is performed by a plurality of side pressure adjusting devices 55 fixed on the pressing plate 14 outside the holding frame 15. This side pressure adjustment device 55 includes a rod 58 that is screwed into a screw hole of a fixing base 56 and extends into a recess 57 formed in the outer wall of each side member of the holding frame 15.
The rod 60 has large diameter heads 59a and 59b at both ends, and is screwed into a screw hole formed in the fixing base 56, and the large diameter head 59a at one end is attached to the fixing base 5.
The large-diameter head 59b of the rod 6 protrudes outward from the other end and is rotatably enclosed in the side member.
It is composed of 0.

As a result, each side member of the holding frame 15 is attached to the rod 5.
8 and 60 to protrude from the fixed base 56 in the direction of the side member, the arrow 6 is shown in FIG.
It is moved in the forward direction indicated by 2. On the other hand, the backward movement of the side member is achieved by retracting the rod 58 and rotating the rod 60 to pull back the side member engaged by the large-diameter head 59b at its end. Note that nuts 63a, 63b, 63c are screwed onto each rod 58, 60, respectively.
is the fixing nut for the rod. Rod 58
By moving the holding frame 15 using both the rods 58 and 60, it is possible to completely prevent play between the holding frame 15 and the rods 58, 60, etc., and the position of the holding frame can be completely adjusted.

A melting and welding margin setting device 64 is attached to the upper surface of the fixing table 56 to accurately provide the pallet melting margin and welding margin, that is, welding thickness when the half portions 16a and 16b of the pallet 16 are overlapped and welded. It is being This melting and welding allowance setting device 64 is constructed by two abutment tables 64a and 64b which are arranged adjacent to each other and have different heights, and each of which is fastened onto a fixing table 56 by bolts or the like from the upper surface thereof.

Of the two butting tables 64a, 64b, the higher one 64a has an upper surface that melts more than the upper surface, that is, the welding surface, of the half portion 16a of the unwelded pallet 16 placed in the holding frame 15. This is a reference table whose height is determined so that it is located at a lower position by the margin, and when the half part of the pallet 16 is brought into contact with the heating plate 12 and melted, this butt table
4a will be melted until it comes into contact with the heating plate. The fixing table 56 as described above and the melting and welding filter setting device 64 are similarly attached to the pressing plate 14 of the other holding device 11b located above. However, the melting and welding margin setting device 64 in the upper holding device 11b is set at a high level so that its reference base and abutment bases 64a and 64b mesh with the lower reference base and abutment bases 64a and 64b that oppose them. The positions of the base, that is, the reference base and the lower abutment base are opposite to those of the lower reference base and the abutment base.

From this, it can be seen that the half portions 16a of the pallet 16,
The welding margin 16b is obtained by the difference in height between the reference stand 64a and the abutment stand 64b. Therefore, when changing the dimensions of the welding margin, the low abutting table 64b is appropriately removed and the reference table 6
A stand 6 with a height that provides the desired level difference with respect to 4a.
Just replace it with 4b. Also, palette 1
When the height of the half parts of No. 6 is changed (i.e., when welding halves of different types of pallets together), the standard is such that the upper surface is located lower than the upper surface by the desired melting margin. It is sufficient to replace it with the stand 64a.

This makes it possible to accommodate various pallets and to easily and accurately provide a desired welding margin.

Next, a supply source 2 supplies unwelded pallets 16 to the welding apparatus 10 according to the present invention while setting them.
4 will be explained in detail.

A supply device serving as a supply source 24 is installed on the side of the welding device 10 as shown in FIG. 1, and the supply device 24 is equipped with a lifter 65. On the support plate 66 of the lifter 65, unwelded pallets 16 are stacked so as to form a set of pallets with the upper and lower half portions 16a and 16b facing each other.

As shown in FIG. 12, this feeding device 24 is provided with a plurality of devices 67 for correcting misalignment of pallets arranged to protrude toward the upward movement path of the pallet group. As shown enlarged in FIGS. 13 and 14, this correction device 67 basically consists of two arms 68a and 68b that are pivotally supported on a cantilever, and two arms 68a and 68b at the tips of these two arms. Therefore, it is composed of a rotatably supported roller 69 and weights 70a and 70b that restrict the upward pivoting movement of this arm.

To explain this in more detail, two straightening devices 67 are arranged on each side of the unwelded pallets 16 stacked in sets on the support plate 66 of the lifter 65. These correction devices 67
The two straightening devices disposed on the welding device 10 side are rotatably supported by bearings 72 provided on a pedestal 71 disposed above the supply device 24 so as to surround the unwelded pallets. 16 includes a common pivot axis 73 extending along the sides of the 16. The arm 6 is attached to this shaft 73.
One end of 8a, 68b is a slotted fastener 74
(Fig. 15). Further, weights 70a, 70b are attached to the arms 68a, 68b so as to be slidable thereon. Further, the bearing portion 72 of the shaft 73
Nearby there is an arm 68 as shown in FIG.
A stopper 75 that abuts on the pedestal 71 is fixed so that a and 68b do not pivot downward from the horizontal position.

To explain the action of this correction device 67, the 13th
14, arms 68a, 68
The roller 69 supported at the tip of the roller 69 is positioned so as to contact the side surface of the unwelded pallets 16 accurately stacked at the reference position when the arm is in the horizontal position. As a result, if there is a pallet 16 that deviates from its reference position and rises with its sides protruding, the protruding sides tend to lift the rollers 69. but,
A predetermined amount of rotational torque 76 is applied to the roller 69 to cause it to pivot downward depending on the position of the weights 70a and 70b attached to the arms 68a and 68b.
6, the incorrectly aligned pallet 16 will be pushed back.

Therefore, the weights 70a and 70b are connected to the arm 68.
The more the tips of the arms a and 68b, that is, the closer to the roller 69, the greater the rotational torque of the arm, and as a result, the roller 69 will move toward the protruding unwelded pallet 16.
The force that tries to push the side of the body horizontally increases.

However, if there is an unwelded pallet that protrudes abnormally and the position cannot be corrected by this straightening device, the excessive lifting of the arms 68a, 68b is detected by a phototube or a limit switch, and the feeding device 24 is adjusted. The system will stop functioning and the abnormally stacked unwelded pallets will have to be re-stacked manually.

As shown in FIG. 1, two such straightening devices 67 are arranged on each side (four sides) of the unwelded pallet. One of the straightening devices 67' arranged on the front and back sides in FIG. 1 is shown in detail in FIG. , weights 70a and 70b are attached to both sides of the roller 69. In such a correction device, the magnitude of the rotational torque of the arms 68a, 68b cannot be changed only by moving the weights. However, by changing this weight, it is possible to change its rotational torque, in other words, the horizontal pressing force applied by the roller 69 to the unwelded pallet.

In this way, the vertical alignment of the unwelded pallets stacked in groups on the support plate 66 of the lifter 65 is achieved during the lifting process of the unwelded pallets by the lifter. Therefore, the upper and lower half portions 16a and 16b of the pair of unwelded pallets 16 that have been raised to a predetermined position at the top of the supply device 24 are completely aligned and superimposed.

The set of unwelded pallets 16 that have risen to a predetermined position at the top of the supply device 24 are transferred onto the protruding member 13a of the welding device 10 by the transfer device 76, as shown in FIGS. 1 and 12. will be moved to.
The transfer device 76 has rollers 77a and 77 on both sides.
b, and includes a cart 78 movably disposed on a pedestal 71. A motor (FIG. 1) is disposed on the frame 71 at the rear of the truck 78, and a drive shaft 79 of the motor rotates a driven shaft 81 by a chain 80. A chain 83 is encircled between this driven shaft 81 and a shaft 82 disposed on a frame 71 near the entrance to the welding device 10, and end portions of the chain 83 are attached to the front and rear ends of the cart 78 of the transfer device 76, respectively. is connected.

As a result, in the carriage 78 of the transfer device 76, the driven shaft 81 is rotated by the drive of the motor, and the chain 83 is rotated by the rotation of the driven shaft 81, so that the cart 78 runs on the frame 71 in the direction of the welding device 10. A shock absorbing device 84 consisting of an air cylinder is attached to this cart 78 so as not to apply an excessive impact when pushing the side surface of the uppermost unwelded pallet 16.
Furthermore, this trolley 78 has running rollers 77a, 7
Arms 85a and 85b are provided extending from both ends of the pallet 7b to both sides of the unwelded pallet 16. These arms 85a, 85b are provided with clamping devices 86a, 86b, respectively, consisting of air cylinders extending toward the unwelded pallet 16, and thereby clamp the uppermost unwelded pallet 16 from the sides.

In this way, the unwelded pallet 16 that has arrived at the uppermost predetermined position of the supply device 24 is clamped by the cart 78 of the transfer device 76, and is fed into the welding device 10 as the cart 78 moves. Ru. In addition, in FIG. 1 and FIG. 12, reference numerals 87a,
The members indicated by 87b and 87c are the lifter 65.
The support plate 66 is erected to guide the angle of the vertical upward movement of the support plate 66 to prevent wobbling. Among these guide members, a member having an L-shaped cross section designated by reference numeral 87c is fixedly supported at the tip of the piston rod of the air cylinder device 88 so that its position can be changed depending on the size of the support plate 66.

Next, FIGS. 16 to 19 show a heating device 90 for simultaneously melting the welding surfaces of each half of the unwelded pallet 16 held by the holding devices 11a and 11b, respectively. As is clear from FIG. 12, this heating device 90 is arranged adjacent to the back side of the welding device 10, and the unwelded pallets 16 are separated vertically by the holding devices 11a and 11b of the welding device 10. The heating plate 12 is moved in and out between the half portions 16a and 16b.
Therefore, the heating device 90 is equipped with a pair of grooved rail members 92a and 92b (1) provided on the support base 91.
The other rail member 92a has a plurality of rail members (as shown in FIG. 12), and these rail members are arranged with groove sides facing each other and spaced apart from each other.

On the other hand, suspension rollers 93 are attached to both side edges of the heating plate 12 at predetermined intervals, and these suspension rollers are arranged in the grooves of each rail member 92a, 92b, so that the heating plate 12 It is suspended so that it can run along the member. Further, a motor 94 is disposed at the rear of the support base 91 of the heating device 90, and the motor rotates a driven shaft 96 via a chain 95. A chain 98 is wound around a sprocket attached to the driven shaft 96 and a sprocket 97 disposed on a support stand 91 in the vicinity of the welding device 10, and each end of the chain 98 is attached to a rear portion of the heating plate 12. 99. As a result, the chain 98 is rotated by the drive of the motor 94, and the heating plate 12 is moved into the welding device 10, or returned into the heating device 90 if it is inside the welding device 10.

In such a heating device 90, the heating plate 12
The support stand 91 on the lower side has a jack 1 in place.
00 is placed. The uses of this jack 100 are as follows. The entire surface of the heating plate 12 is not always used. This is because the middle side of each half portion 16a, 16b of the unwelded pallet 16 to which the heating plate 12 is applied, that is, the side to be welded, has a perforated shape, and only the peak portion of the half portion 16b is perforated.
come into contact with. Therefore, due to long-term use of the heating plate 12, only the portion corresponding to the inner shape of each half portion 16a, 16b is damaged, and the other portions are completely the same as when not in use. Therefore, it is only necessary to slightly shift the heating plate 12 so that the conventionally used portion does not correspond to the inner shape of the half portions 16a, 16b. For this reason, the suspended roller 93 is connected to the heating plate 12.
Bolt insertion opening 1 of bearing part 101 attached to
02 is a slot, that is, a long hole, so that the position of the heating plate 12 can be shifted laterally. A jack 100 is used to support the heating plate from below when shifting the mounting position of the heating plate 12. Moreover, this heating plate 12
To facilitate movement (lateral movement) on the jack, a roller 103 is provided on the top of the jack 100.
is provided.

By using such a heating device 90, the welding device 10
The heated plate 12 moved in melts the joint surfaces of each half of the unwelded pallet 16, and then each of these halves 16a, 16b is moved into the holding device 11a after the heated plate 12 is returned to the heating device 90. , 11b, the welding and joining are performed. The pallet 16 that has been completely welded by the welding device 10 is pushed out of the welding device 10 by unwelded pallets that are subsequently supplied from the supply device 24.

As shown in FIG. 1, the pallet 16 pushed out from the outlet side of the welding device 10 is completely removed from the welding device 10 by a feed roller device 105 attached to the outlet side support frame 18 of the welding device 10. The paper is pulled out and moved on the transport roller conveyor 106 toward the next process device. The structure of this feeding roller device 105 is shown in FIG.

Referring to FIG. 20, the feeding roller device 105 is
A pair of arms 107 are integrally formed in a V shape, and the arms 107 are disposed near both sides of the conveyance path of the welding pallet 16, and are disposed laterally as shown in FIG. movably supported. The lower arm member 108 of this V-shaped arm 107 has a shaft 10 extending across the conveyance path of the welding pallet 16 at the tip and bending portion, respectively.
9, 110 are rotatably supported at both ends.

A plurality of rollers 111, 112 are attached to each of these shafts 109, 110 in the axial direction, and a belt 113 is hung around these rollers. A roller 112 mounted on a shaft 110 bearing the bent portion of the V-shaped arm 107
The drive roller 115 of the motor 114 installed at an appropriate position on the support frame 18 of the welding device 10 is also stretched by a belt 116 (see Fig. 1).
12 and 20). As a result, the roller 111 disposed on the shaft 109 carried on the tip of the lower arm member 108 of the V-shaped arm 107 is rotated by the drive of the motor 114.

On the other hand, the upper arm member 11 of the V-shaped arm 107
The tip of the piston rod 8 is pivotally connected to the tip of a piston rod of an air cylinder device 117 disposed on the support frame 18 of the welding device 10 through a slot formed in the tip. As a result, the actuation of the air cylinder device 117 causes the V-arm 107 to pivot about the bend, so that the roller 1 supported by the end of the lower arm member 108
The belt 113 hung on the welding pallet 1
It is pressed against the top surface of 6. As a result, the surface of the belt 113 of the roller 111 can be pressed against the welding pallet 16 with an appropriate force by controlling the operation of the air cylinder device 117.
is given a positive moving force by the rotating belt 113 and is completely pulled out from the welding device 10.

FIG. 21 shows a modification of the feed roller device 105. This modification of the feeding roller device 120 is based on the support frame 18 of the welding device 10.
including an air cylinder device 121 attached to the
The piston rod of this air cylinder device 121 extends perpendicularly to the upper surface of the welding pallet 16. A roller holding frame 122 is attached to the end of the piston rod, and a roller 123 is placed at the end of the roller holding frame with its rotating shaft pressed by a spring 124. As a result, the roller 123 is always brought into contact with the surface of the welding pallet 16 with a predetermined force (pressing force by the spring 124) due to the action described later. This roller 12
3, a belt 126 is endlessly looped through a drive roller 115 of a motor 114 and a tension roller 125.

According to such a feeding roller device 120, the roller 123 is controlled by the air cylinder device 121 to a position where it comes into contact with the welding pallet 16 (the belt 126 is in direct contact with the welding pallet 16). The welding pallet 16 is pressed against the surface of the welding pallet 16 via the roller 123 to which a constant pressing force is applied by the welding pallet 16, thereby imparting a moving force to the pallet. In addition, the tension roller 125
is provided to prevent the belt 126 from slackening.

The welding pallet 16 pulled out from the welding device 10 in this manner is conveyed on a conveyor roller conveyor 106 consisting of a large number of roller groups as shown in FIGS. 1 and 12, and sent to the next process equipment. However, the welding pallet 16 may have to wait at the exit end of the transport roller conveyor 106 due to equipment for the next process. Therefore, a device 130 is provided at the exit end of the conveyor roller conveyor 106 to stop the movement of the welding pallet 16 that has been conveyed. This travel stop device 130 is shown in FIG.

Referring to FIG. 22, this movement stop device 130
is the frame 131 of the transport roller conveyor 106
Two stoppers 132a, 132b pivotally connected to
It is equipped with These stoppers 132a, 132b
The lower end of the piston rod 1 of the air cylinder device 133 is connected to the piston rod 1 of the air cylinder device 133 through a slot formed in the lower end.
They are both pivoted to 34. Also, stopper 13
The upper ends of 2a and 132b are formed in such a length that they protrude above the rollers of the transport roller conveyor 106 when the stopper is pivoted by the operation of the air cylinder device 133 and stands vertically.

As a result, the welding pallet 16 that is kept on standby on the transport roller conveyor 106 is
A stopper 132 protruding from below at the outlet end of 06
A, 132b are stopped by their side surfaces coming into contact with the upper ends.

FIGS. 23a and 23b show a deburring device 140 that is used as a device for the next process. Welding pallet 1 kept on standby on conveyor roller conveyor 106
6 is a turntable 14 of the deburring device 140;
It can be placed on top of 1. This turntable 141 is supported by the piston rod of a cylinder device 143 attached to a pedestal 142, and above it is supported by the piston rod of a cylinder device 145 attached to the end of an L-shaped arm 144 extending from the pedestal 142. A suspended clamp plate 146 is arranged. Each cylinder device 143, 14 of such turntable 141 and clamp plate 146
5, the welding pallet 16 placed on the turntable 141 is tightened and held. In this way, burrs generated on the weld line 147 formed on the side surface of the weld pallet 16 are removed while the weld pallet 16 is rotated.

Thus, the welding apparatus 10 of the present invention can achieve complete automation by improving the apparatus 24 for supplying unwelded pallets 16 to the welding apparatus and its associated devices.

In particular, it has been an issue for a long time to provide a receiving part for unwelded pallets 16 in the welding device 10, in other words, to transfer and support the unwelded pallets 16 supplied from the supply device 24 onto the holding frame without stagnation. This will greatly contribute to the achievement of automation.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the welding device according to the present invention together with its attached equipment, and Fig. 2 a and b are partial views showing the shape of the protruding rod protruding through the hole formed in the pressing plate of the holding device. A plan view and a sectional view taken along the line b--b; FIGS.
- sectional view taken along the line b; FIGS. 4a and b are similar plan views showing another variant of the protruding rod shown in FIG. 2; and a sectional view taken along the line b--b. ,
Figures 5a and b are similar plan views and cross-sectional views taken along the line Vb-b showing still another modification of the protruding rod shown in Figure 2, and Figures 6a and b are unwelded. 7a and 7b are partial views showing a fixing device for fixing half of an unwelded pallet placed in a holding frame; FIGS. Plan view and b-
8 is a similar plan view showing a modification of the fixing device shown in FIG. 7; FIG. 9 is a further alternative of the fixing device shown in FIG. 7; A cross-sectional view similar to FIG. 7b showing a modified example; FIG. 10 is a partial plan view of the pressing plate generally showing the holding frame, lateral pressure adjustment device, and welding allowance setting device arranged on the pressing plate; Fig. 11 is a cross-sectional view of the pressing plate shown in Fig. 10 taken along the line XI--XI, showing the side pressure adjustment device and welding allowance setting device, and Fig. 12 shows the welding device shown in Fig. 1. FIG. 13 is a partial plan view showing a device for correcting stacking misalignment of unwelded pallets in a device for supplying unwelded pallets, and FIG. 14 is a plan view of the attached device as seen from above; FIG. 14 is a partial plan view of one of the above-mentioned correction devices. 15 is a perspective view showing a fastener that connects the arm of the orthodontic device to the shaft, FIG. 16 is a side view of the welding device and attached device shown in FIG. 1, seen from the right side, and FIG. 17 The figure is a partial plan view showing one side edge of the heating plate to show the heating plate traveling device, and Fig. 18 is a partial plan view of one side edge of the heating plate.
19 is a cross-sectional view taken along the line - in FIG. 18, and FIG. 20 is a side view showing the feed roller device that applies a moving force to the welding pallet coming out of the welding device. , FIG. 21 is a similar side view showing a modification of the feeding roller device of FIG. 20,
Fig. 22 is a side view showing a stop device attached to the exit end of the conveyor roller conveyor, and Figs. 23a and b are front views showing a device for removing burrs generated on the side surfaces of pallets welded and joined by a welding device. FIG. 3 is a diagram and a side view. 10... Welding device, 11a, 11b... Holding device,
12...Heating plate, 13a, 13b...Protruding member, 14
...Press plate, 15...Holding frame, 16...Pallet, 16
a, 16b...Half part of pallet, 21a, 21b
...Protruding rod, 26, 28... Support plate, 29... Spring member.

Claims (1)

[Scope of Claims] 1. A pair of holding devices that are arranged vertically facing each other to accommodate, hold, and weld objects to be welded and joined, and that can be approached and separated from each other, and each of the holding devices A welding device comprising a heating plate that is provided so as to be able to go in and out through the gap when separated, and each of the holding devices includes a pressing plate and an external shape of the welded object provided on the side where the pressing plates face each other. a retaining frame having an internal shape substantially the same as, but slightly smaller in size, and having an outwardly opening sloping surface on its inner surface; A protruding member is provided that protrudes from the pressing plate of each holding device in order to push out the welded object from each of the holding devices, and among the projecting members, the protruding member provided on the lower holding device In order to support the welded object housed in the holding device on the holding device before welding, and to push out the welded object from the holding device after welding, from the inside of the holding device to the same level as the upper surface of the holding frame. Or a welding device characterized by being able to protrude higher than the upper surface. 2. In the welding device according to claim 1, the protruding member provided on the lower holding device is
In order to make the welding object smoothly enter the projecting member when supporting the welding object, the upper edge of the projecting member on the welding object entrance side is inclined with respect to the direction in which the welding object enters. A welding device characterized in that the welding device is formed on a flat surface. 3. In the welding device according to claim 2, the protruding member is composed of a plurality of rod-shaped members,
A welding device characterized in that an upper edge of each rod-shaped member on the welding object entrance side is chamfered. 4. In the welding device according to claim 2, the protruding member comprises a plurality of rod-like members and one or more support plates mounted on the tip surfaces of the plurality of rod-like members. . A welding device, wherein the upper edge of the support plate on the welding object entrance side is chamfered. 5. In the welding device according to claim 2, the protruding member includes a plurality of rod-shaped members, a spherical member held at the tip of each of the rod-shaped members, and a deflection force applied to the spherical member. A welding device consisting of a spring member. 6. The welding device according to any one of claims 1 to 5, in which the welding device is fed in order to position the welded object accommodated in each of the holding devices between the holding devices before welding. A welding apparatus comprising a positioning device for holding a front end and both sides of the object to be welded in a traveling direction.