JPH03153337A - Welder - Google Patents

Abstract

PURPOSE:To improve the productivity of the molding of several kinds of pallets remarkably by one welder by varying the height of a butting base for setting melting clearance in a melting clearance setter for a material to be welded mechanically in a very short time without exchanging the butting base. CONSTITUTION:When the kinds of pallets differ, thickness thereof often differs. That is, the thickness of a skit changes. A susceptor 24 is lifted by an air cylinder device 26 in such a case, an air cylinder device 32 is operated during that time and a sliding base 27 is slid, a reference base 29 in desired height is positioned just under the susceptor 24, and the height of the susceptor 24 is altered. Accordingly, the level of the top face of a high butting base 23a is varied together with another butting base 23b, thus mechanically setting the melting clearance of skits having different thickness completely without using a hand.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a welding device, and more particularly, to a welding device used when welding and joining synthetic resin molded products into a finished molded product.

(Prior art) Conventionally, this type of welding apparatus has been disclosed in Japanese Patent Publication No. 60-32575, Japanese Patent Publication No. 62-12017, and Japanese Patent Publication No. 63-56.
It is disclosed in Japanese Patent Publication No. 852 and Japanese Patent Publication No. 63-61174.

The conventional welding devices disclosed in these publications include a pair of holders that are arranged vertically facing each other and that can be approached and separated from each other in order to accommodate and hold the objects to be welded together. It basically consists of a device and a heating plate that can be moved in and out of the gap when the holding device is separated.

As for the operation of such a welding device, for example, if a molded product (hereinafter simply referred to as a skit) with a vertical ratio that makes up a resin pallet is the object to be welded, each of the upper and lower skits is held by opposing holding devices. The welding sides of each skit are simultaneously pressed against the surface of the heating plate and melted by placing a heating plate between them, and then the heating plate is removed and both skits are butted and joined by their fused portions.

By the way, in such a welding device, when welding both skifts together as disclosed in Japanese Patent Publication No. 62-12017, the welding margin (
Strictly speaking, a melting and welding allowance setting device is provided to accurately provide the skit thickness (definition of skit thickness) and melting allowance. This setting device is installed on a pressing plate or a mounting plate that constitutes a holding device, and includes one abutting table A whose upper surface is positioned lower than the welding surface of the skit supported by the holding device by the amount of melting margin, and this butting table A. and another abutting table B whose upper surface is positioned at a lower position than the upper surface of (this difference in height becomes the welding margin). When this setting device is installed on the pressing plates of the upper and lower holding devices, one abutting table A, B is arranged so as to mesh with the other abutting table A, B facing them.

(Problem to be Solved by the Invention) However, in the case of the melting and welding allowance setting device in the conventional welding device, when the height or thickness of the skit is changed (to form a different type of pallet, When welding skits together), it is necessary to replace the butting table A with the upper surface located lower than the welding side surface of the skit by the desired melting margin, and when replacing the butting table A. In the conventional setting device, the butting table B must be replaced regardless of whether or not the dimensions of the welding margin are changed. However, such a setting device is installed at a total of 12 locations in one welding device. However, replacing the butt table requires a person to enter the narrow space between the upper and lower holding devices of the welding equipment, which can take several hours, which is extremely inefficient and needs to be improved. .

The purpose of the present invention was to solve such conventional problems, and it is possible to promptly respond to changes in the thickness of half bones when forming different types of resin molded products by welding the upper and lower hand parts. It is an object of the present invention to provide a welding device capable of changing the height of abutting table of a melting margin and welding margin setting device.

(Means for Solving the Problems) The present invention provides a pair of holding devices that are arranged vertically facing each other to accommodate and hold objects to be welded together, and that can be approached and separated from each other. , and a welding device comprising a heating plate provided so as to be able to go in and out through the gap when the holding devices are separated; a holding frame for regulating the outer wall of the welded object; a support stand movable in the thickness direction; an abutment stand of different heights mounted on the support stand; and an abutment stand of different heights slidably disposed at the bottom of the support stand to adjust the height of the support stand. It is characterized by having a small number (and two reference stands).

(Function) According to the welding apparatus of the present invention, when welding objects with different thicknesses by holding them with the upper and lower holding devices, the support base in the melting allowance and welding allowance setting device is adjusted to the thickness of the welding objects. direction, and in the meantime, slide the reference stand placed at the bottom of the support stand to selectively position the reference stand at a height that corresponds to the object to be welded, and place the support stand on top of it. do. Then, using a method similar to the conventional method, a heating plate is inserted between the objects to be welded, and the joint surfaces of the objects to be welded are melted until the abutment table A comes into contact with the heating plate, and then the heating plate is removed and both objects to be welded are melted. are overlapped and joined using the difference in height between butt tables A and B as a welding margin.

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

In FIG. 1, a welding device according to the invention is indicated at 1°. This welding device 10 includes a pair of holding devices 11 that are vertically spaced apart and facing each other, a heating plate 12 that is provided so as to be able to go in and out within this space (see FIG. 2), and each holding device. a protruding member 13a disposed inside 11;
13b.

Each of the holding devices 11 includes a mounting plate 14 and a holding frame 15 provided on the mounting plate. It is composed of frame pieces 15a divided into a plurality of pieces to support the 16 semi-molded products (skits) on the outer surface, and the positions of these frame pieces 15a can be changed according to the size of the skit to be molded. It is supported by riding on the rail 15b.

The mounting plate 14 of each holding device 11 is connected to the cylinder device 1, respectively.
It is attached to the support frame 18 via 7. Thereby, each holding device 11 can be moved toward and away from each other by operating each cylinder device. At this time, a guide rod 19 is attached to the mounting plate in order to move each holding device 11 accurately and stably in a predetermined direction, that is, in the present embodiment, in the vertical direction.

By the way, in the above-mentioned protruding members 13a and 13b,
The protruding member 13a is located at the lower beam 18 of the support frame 18.
a, while the projecting member 13b is the piston rod of a cylinder arrangement 1f20 fixed to the upper beam 18b, so that the projecting member 13b is itself movable. Each of these protruding members 13a, 13b is attached to the frame piece 1 through a hole formed in each mounting plate 14 of the holding device 11.
5a.

In particular, when the holding devices 11 are in a state in which the holding devices 11 are spaced apart from each other to receive the unwelded barrels 16 (the state shown in FIG. 1), the upper end of the protruding member 13a is flush with the upper surface of the frame piece 15a. or a length dimension that protrudes higher than the upper surface. The upper end of each protruding member 13a on the side where the unwelded pallet 16 enters the welding device IO is chamfered.

According to such a protruding member 13a, an unwelded barrel) 1
When a set of said barens 16 are fed between the respective spaced holding devices 11 of the welding device IO from a supply source that appropriately supplies 6, the protruding member 13a is attached to the frame piece 15a of the holding device 11a.
A plurality of protruding members 13a from the sides of the welding device 10 are higher than the upper surface (because they protrude, the frame pieces do not become an obstacle).
You can place it by sliding it up. Moreover,
Since the upper edges of the protruding members 13a are chamfered on the entry side of the unwelded barrels 16, each protruding member 13a 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 placed on the protruding member 13a in this manner is placed in a position aligned with the holding frame 15 by the positioning device 21.
1 is removed from between the holding devices 11 and the lower holding device 11
is raised by the cylinder device 17, and at the same time, the upper holding device 11 is also lowered by the cylinder device 17, so that each holding device approaches each other. At this time, as the holding device 11 rises, the protruding member 13a is relatively removed from the holding frame 15, and therefore, the unwelded barrels 16 are moved into the holding frame 15 by the approaching thrust of each holding device 11. Press-fitted. That is, the lower half of the unwelded barrel 16 is press-fitted into the holding frame 15 of the lower holding device 11, and the upper half is press-fitted into the holding frame 15 of the upper holding device 11.

Next, in the holding device 11 that press-fits and holds each half bone of the unwelded pallet 16, the upper holding device! 11 only rises and returns to its original position, ie, the position shown in FIG. 1, by the actuation of the cylinder device 17. The reason for this is that when the lower holding device 11 descends, the protruding member 1 undergoes relative movement.
3a enters into the holding frame 15 and pushes out the half bones of the unwelded pallet 16.

When the two-sided portions of the unwelded pallet 16 are separated in this manner, the heating plate 12 (FIG. 2) is moved and placed between them. Then, the lower holding device 11 is further raised and the upper holding device 11 is lowered so that the joining surface of the hand portion of the unwelded barrel (16) comes into contact with the heating plate 12.

As a result, the joint surfaces of the respective hands of the pallet 16 that are in contact with both surfaces of the heating plate 12 are melted and then separated by the heating plate 12 again, at which time the heating plate 12 returns to its original standby position. Then, only the upper holding device 11 descends to abut the front half of the unwelded pallet 16, and is supported by the thrust of the cylinder device 17 and the other cylinder device f17 via the bottom plate serving as the mounting plate 14 of each holding device 11. A relatively more pressing force, that is, a pressing force is applied to the front half portion.

As a result, the first half of the unwelded pallet 16 is welded and joined. Thereafter, the protruding member 13b, which has been moved together with the upper holding device 11, is moved to its cylinder device 20.
, and only the upper holding device ll is raised. As a result, the protruding member 13b relatively enters into the holding frame 15 and pushes out the welded pallet 16'.Next, the lower holding device 11 also descends, and as a result, the protruding member 13a is relatively held. By entering the frame 15, the pallet 16' is pushed out of the holding frame 15. Of course, in reality, the pallet 16' is positioned on the protruding member 13a and remains stationary, and only the holding frame 15 is lowered and returned to its initial position.

For this reason, the pallet 16' is supported by the protruding member 13a that is the same as or higher than the upper surface of the holding frame 15 in the lower holding device 11, and therefore is not transported next. The unwelded pallet 16 is pushed out and moved to the side discharge side of the welding device 10 without any hindrance.

The above is the overall operation of this welding apparatus 1O, and the details of other constituent parts will be explained below based on such operation.

On the mounting plate 14 of each holding device 11, there is a melting allowance and welding allowance setting device (hereinafter simply referred to as setting device) 22 located outside the holding frame 15 as shown in FIG.
is provided. This setting device 22 is used to accurately provide the melting thickness of the skits when overlapping and welding the skits of the unwelded pallets 16, in other words, to accurately provide the designed thickness of the skits before welding and the welding thickness, that is, the welding thickness. There are 8 in total, 4 each on the unwelded pallet supply side and the welded pallet outlet side of the mounting plate 14.

As clearly shown in FIG. 3, this setting device 22 has two abutting tables 23 arranged adjacently and having different heights.
a and 23b are fixed onto a support base 24 from their respective upper surfaces with bolts or the like. This support stand 24
The piston rods 26a of two air cylinder devices 26 are fixed to the piston rods 26a of two air cylinder devices 26, each of which has a piston rod 26a extending upward from a common hole on the upper surface of the gate-shaped frame 25 fixed to the mounting plate 14. It is said to be movable. On the upper surface of this pedestal 25 and below the support base 24, a sliding base 27 having flange portions 27a formed on both sides is arranged. The flange portion 27a of this sliding table 27 is fitted into a dovetail groove formed by an inverted-shaped presser member 28 attached to the pedestal 25, so that the sliding pedestal 27 linearly reciprocates on the pedestal 25. It is considered possible. A dovetail groove is also formed in the upper center of the sliding base 27, and two reference bases 29 of different heights are fitted into this dovetail groove, and the sliding base 27 is fitted with a dovetail groove.
The stoppers 30 provided at both ends of □'7 prevent it from falling out.

An air cylinder device 32 is fixed to one end of the pedestal 25 via a mounting member, ie, a bracket 31, and an end of a piston rod 32a of the air cylinder device 32 is connected to an end surface of the sliding table 27. As a result, the sliding table 2
7 is the frame 2 by the operation of the air cylinder device f32.
Reference stands 29 of different heights held by the sliding stand 27 can be selectively positioned below the support stand 24 by sliding on the support stand 24 .

According to the setting device 22 configured as described above, when forming several types of pallets 16', the thickness of each skit 2 and the welding method can be set when the skits corresponding to each pallet are welded to each other. That is, the skit is placed on heating plate 1.
2 and melt the joint side thereof, the high abutting table 23a will be melted until it comes into contact with the heating plate 12. This setting device 22 is also attached to the mounting plate 14 of the upper holding device 11 at the same position. However, the setting device 22 attached to the upper holding device 11 is located at abutment tables 23a and 23b of different heights.

The upper and lower abutting bases 23a and 23b are made to mesh with each other.

From this, the welding margin of the skit is the butt table 23a,
This is obtained by the difference in height of 23b. In general, this welding margin does not change much even for pallets of different sizes, so in most cases, the difference in height between the butting tables 23a and 23b may be constant.However,
Different types of pallets often have different thicknesses. That is, the thickness of the skit changes. Therefore, in such a case, the support stand 24 is raised by the air cylinder device 26, and in the meantime, the air cylinder device 32 is operated to slide the sliding table 27, so that the reference stand 29 at the desired height is placed directly below the support stand 24. Position and support stand 2
Change the height of 4.

As a result, the level of the upper surface of the high abutting table 23a is changed together with the other abutting tables 23b, and the setting of the melting margin for skits of different thickness can be done entirely mechanically without using human hands.

In the welding apparatus of the embodiment described above, the setting device 22 was equipped with two reference stands 29 of different heights, but the number of reference stands 29 is not limited to two, and may be set in advance. There can be three or more depending on the number of types of pallets.

(Effects of the Invention) As explained above, according to the welding apparatus of the present invention, the height of the abutting table for setting the welding allowance and the welding allowance in the welding allowance setting device of the welded object can be adjusted by changing the abutment stand. Since it can be changed mechanically and in an extremely short time without any problems, it is possible to set the melting margin when forming several types of pallets very quickly, which increases the productivity of forming several types of pallets with one welding device. can be dramatically improved.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a welding device according to an embodiment of the present invention, and FIG. 2 is a front view partially showing a melting margin and welding margin setting device provided in the welding device shown in FIG. 1. 3 is a perspective view showing the melting allowance and welding allowance setting device shown in FIG. 2. 10... Welding device, 11... Holding device, 12...
Heating plate, 14... Mounting plate, 15... Holding frame, 16.
...Unwelded pallet, 22... Melting allowance and welding allowance setting device, 23a, 23b... Butting table, 24...
・Support stand, 26... Air cylinder device, 27...
- Sliding stand, 29... Reference stand, 32... Air cylinder device. Figure 3

Claims (1)

[Scope of Claims] A pair of holding devices that are arranged vertically facing each other to accommodate and hold objects to be welded to be welded together, and that can be approached and separated from each other, and that the holding devices are separated from each other. In a welding device consisting of a heating plate that can be moved in and out of the gap when (2) Each of the mounting plates of each of the holding devices is provided with a setting device that defines the welding margin of the welded object, and the setting device is configured to adjust the welding margin of the welded object. a support base that is movable in a direction; an abutment base of different heights mounted on the support base; and at least two abutment bases of different heights that are slidably disposed below the support base and adjust the height of the support base. A welding device comprising a reference stand.