JPH0226930Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of the Invention This invention relates to a spring processing device that successively heat-treats, cools, and packages a pre-heat-treated spring formed by winding a wire rod.

(b) Background of the invention When treating the above-mentioned unheated spring,
After the spring is heat-treated in a heat-treating furnace equipped with a heater, a fixed amount of the spring is placed in a plastic bag or the like and packaged.

However, if the above-mentioned heat treatment furnaces and packaging equipment are individually arranged, manual work is required to transfer the springs between the devices, so the processing of the springs includes the transfer time. In addition, there is a problem that quality control and quantity control are difficult because there is a risk that foreign substances such as molding fragments and dust may be mixed in or lost during transportation.

Furthermore, when packaging the above-mentioned springs in the quantity requested by the user, each spring is individually counted and packaged, which takes time and effort, and if the springs are tangled, a counting error may occur. It also has the problem of being easy to use.

(c) Purpose of the invention This invention reduces processing time and can be manufactured at low cost by sequentially heat-treating, cooling, and packaging a fixed amount of springs. Moreover, after processing, it is possible to handle each bag individually. The object of the present invention is to provide a spring processing device that allows quality control and lot control to be easily performed.

(d) Structure of the device In this device, a heat treatment furnace with a heater installed inside and an entrance and exit is disposed in the upper part of the device body, and a saucer for storing a spring is placed inside the heat treatment furnace. , a hopper is provided above the entrance and exit of the heat treatment furnace to allow the unheated spring to flow down to a tray moved to the outside of the entrance and exit of the heat treatment furnace; A cooling section for storing and cooling the spring after heat treatment is provided at the bottom, and at the bottom of the cooling section,
The spring processing device is characterized by being provided with packaging means for storing the spring in a bag.

(e) Function of the device This device stores a fixed amount of unheated springs in a hopper, then flows the springs down into a saucer waiting at the bottom of the hopper, moves the saucer into the furnace, and heat-treats the springs. After that, the tray is moved to the outside of the furnace, inverted, and cooled by flowing down into the cooling section, and the cooled spring is stored in a bag at the lower part and packaged with a packaging means.

(f) Effects of the invention According to this invention, since heat treatment, cooling, and packaging of a fixed amount of springs are performed continuously, the processing time required from processing to shipping can be greatly shortened.
The spring can be manufactured at low cost, and at the same time, since no human work is involved in the processing, it is possible to prevent foreign matter such as debris and dust from being mixed in during molding, and improve quality control.

Moreover, since a fixed amount of springs are packaged and handled in bags, it is easy to confirm the quantity of springs at the time of shipment, and it is possible to prevent post-processing problems such as insufficient quantities and counting errors. By setting the count value to a value desired by the user, it is possible to perform multiple or small lot packaging.

(g) Example of the invention An example of the invention will be described below in detail based on the drawings.

The drawing shows a spring processing apparatus that successively heat-treats, cools, and packages a fixed amount of unheat-treated springs. In FIG.
The inside of this heat treatment furnace 3 and the heat treatment furnace 3
A spring 4 is attached to the outside of the entrance/exit 3a formed in the
A saucer 5 for storing the water is provided so as to be freely put in and taken out, and on the other hand,
A hopper 6 is provided above the entrance/exit 3a of the heat treatment furnace 3 to allow the unheated spring 4 to flow down to a saucer 5 which has been moved outside the entrance/exit 3a, and a transparent resin tube is installed in the cooling section 7 provided below the entrance/exit 3a. A cassette 9 with a spring 8 attached thereto is loaded therein, and a packaging device 10 for packaging the resin tube 8 after the spring 4 has been discharged is disposed below the cassette 9.

As shown in FIG. 1, the heat treatment furnace 3 described above has a heater 3b installed inside the furnace, a shutter 11 suspended from the front surface of the entrance 3a so as to be openable and closable in the vertical direction, and the heat treatment furnace 3 and the shutter 11 A heat insulating material 12 is attached to the inner surface of the furnace, and a fan 13 is rotatably mounted on the ceiling surface inside the furnace.

Note that the above-mentioned shutter 11 is opened and closed by an air cylinder 14 fixed to the upper part of the entrance/exit 3a.
The rotation of the fan 13 is controlled by a motor 15 fixed to the upper part of the furnace.

The above-mentioned saucer 5 is located outside the above-mentioned heat treatment furnace 3, and has a sprocket 16 pivotally connected to the front position of the entrance/exit 3a and a sprocket 1 pivotally connected to the rear position.
6 and two sprockets 1 pivoted at the bottom
After an endless chain 17 is stretched between the chains 6 and 16, the rear part of the saucer 5 is fixed on the chain 17 and held in a horizontal state.

The above-mentioned chain 17 connects the sprocket 16, which is pivotally connected to the rear part of the heat treatment furnace 3, through the belt 18.
It is rotated by a drive motor 19 fixed at the rear part, and the chain 17 is rotated forward and backward in the direction of moving the tray 5 in and out of the furnace.

The above-mentioned hopper 6 has a spring 4 in the input port 6a.
An optical sensor 20 (or proximity switch) for counting the number of inputs is fixed, and a first shutter 21 is pivotally attached to the middle part of the hopper 6 so as to be openable and closable.
b A second shutter 22 is pivotally attached to the front surface so as to be openable and closable.

As shown in FIG. 2, the aforementioned resin tube 8 is fitted onto the outer surface of the cylindrical cassette 9 from the upper opening side to focus in the length direction, and the retaining ring 9a is made of resin. The cassette 9 is mounted and held on the outer surface of the manufactured tube 8, and vertically loaded into the lower part of the cooling part 7 with the flow outlet 7a formed in the cooling part 7 communicating with the opening in the upper part of the cassette 9. There is.

Note that a third shutter 7b is pivotally connected to the lower surface of the above-mentioned flow outlet 7a so as to be openable and closable.

As shown in FIGS. 1 and 2, the packaging device 10 described above has two guide shafts 23, 23 vertically installed in parallel on the device wall 2a at the bottom of the cooling section 7.
A slide plate 24 is slidably mounted on these two guide shafts 23, 23, and support plates 25, 25 protruding from both sides of the front surface of this slide plate 24 are provided.
Heat press heads 26, 26 for welding the aforementioned resin tube 8 are supported on opposing surfaces thereof so as to be slidable in the direction of clamping the resin tube 8.

As shown in FIG. 2, the above-mentioned slide plate 24 is connected to a gear 27 which is pivotally connected to an upper position of the device wall surface 2a.
By fixing one end of the belt 28 stretched between the and the gear 27 pivoted at the lower position, the upper gear 27 is
A drive motor 29 fixed to the wall surface 2a rotates the belt 28 in forward and reverse directions to move the slide plate 24 up and down.

As shown in FIG.
As shown in FIG. 3, one heat press head 26
There are electric heating plates 26a, 26a at the upper and lower positions of the clamping surface.
is fixed, and the other heat press head 26
The clamping surface is formed into a matching shape.

The processing operation of the spring processing device 1 configured in this way will be described below.

As shown in FIG. 1, via the chute 31,
The springs 4 thrown into the hopper 6 are stored while being counted by an optical sensor 20 fixed to the charging port 6a.

Then, the count of the optical sensor 20 is, for example, 100.
When the number of springs 4 is determined, the first shutter 21 pivotally connected at the intermediate part is opened, and the spring 4 is caused to flow down to the front stage of the second shutter 22, and then the first shutter 21 is closed and a new number of springs 4 are supplied is counted until it reaches a predetermined value.

After that, open the second shutter 22 and
b The spring 4 is caused to flow down into the saucer 5 which is kept in a waiting position at the lower flow position.

Next, start the drive motor 19 and drive the chain 17.
is rotated in the forward direction to move the tray 5 to the center position inside the furnace, and at the same time, the shutter 11 on the front of the furnace is lowered to close the entrance/exit 3a.

Then, the heater 3 is energized and heated, and
While the fan 13 is rotated to stir the hot air and the temperature inside the furnace is made uniform, the spring 4 is heat-treated for about 3 minutes to remove residual stress during molding.

After this heat treatment, at the same time as the shutter 11 is opened, the chain 17 is reversely rotated to move the saucer 5 to the outside of the entrance/exit 3a.
The sprocket 16 pivotally mounted on the front part is rotated slightly and reversed downward, and the heat-treated spring 4 is dropped onto the third shutter 7b pivotally mounted on the outlet 7a of the cooling section 7. The spring 4 is air-cooled for about 1 minute in the mounted state.

In addition, when cooling the above-mentioned spring 4, a blower may be disposed on the wall surface of the cooling part 7 to blow cooling air.

After cooling, the third shutter 7b is opened and the cassette 9 with the spring 4 loaded in the lower part of the outlet 7a is opened.
The liquid is allowed to flow down and fall into the resin tube 8 attached to the cassette 9.

After that, as shown in Fig. 3A, both heat press heads 26, 26 of the packaging device 10 are slid in the clamping direction (arrow direction), and as shown in Fig. 3, the lower part of the cassette 9 is moved. Then, the upper part of the spring 4 at the storage position is clamped, and in this clamped state, the drive motor 29 is started to lower the slide plate 24 a predetermined distance (in the direction of the arrow).

At the same time, the resin tube 8 attached to the cassette 9 is pulled out by the same length as the descending distance of the slide plate 24 (the length of the single bag 8a).

Then, as shown in FIG.
6a is energized to weld the resin tube 8.

Immediately after this welding, as shown by the imaginary line in Figure C, when the slide plate 24 is lowered a short distance (in the direction of the arrow) while holding the resin tube 8, the upper edge side of the seal portion 8b becomes soft due to heat. Therefore, at this position, it is torn to pieces as shown in Figure 2. Note that the bottom of the resin tube 8 left at the top is slightly welded to make it possible to store the next spring 4.

That is, the main body side of the resin tube 8 is torn off with the lower part in a sealed state capable of storing the spring 4, and one single bag 8a is torn off with the upper part completely welded in a sealed state.

After that, when both heat press heads 26, 26 are separated, the separated single bag 8a is placed in the chute 3.
1 and transported to the next processing.

On the other hand, both heat press heads 26, 26 reversely rotate the drive motor 29 to raise the slide plate 24 and return it to the initial position.

Further, after the spring 4 is dropped, the tray 5 is turned upward by a slight forward rotation of the chain 17 and becomes a horizontal state, and stands by in a state where the spring 4 can be stored from the hopper 6.

Since the heat treatment, cooling, and packaging of a fixed amount of the spring 4 are performed continuously in this manner, the processing time can be greatly shortened, and the spring 4 can be manufactured at low cost.

At the same time, since no human work is involved in the processing, it is possible to prevent foreign matter such as debris and dust from being mixed in during molding, and improve quality control.

Moreover, since a fixed amount of springs 4 are packaged and handled in bags, it is easy to confirm the quantity of springs 4, and it is possible to prevent post-processing troubles such as insufficient quantities and counting errors.
By setting the count value to a value desired by the user, it is possible to perform multiple or small lot packaging.

As shown in FIG. 4, another example of the heat press head 26 constituting the above-mentioned packaging device 10 is shown.
As shown in figure E, one heat press head 2
6 has resin tubes 8 at the upper and lower positions of the clamping surface.
Electric heating plates 26a, 26a for welding are fixed, and a fusing heater 26b is protruded from the middle part, and the other heat press head 26 has a clamping surface formed in a matching shape.

In this case, as shown in Fig. F, while the resin tube 8 is being held between the two electric heating plates 26a, 26a fixed to one of the heat press heads 26, electricity is applied to the upper and lower parts of the holding part in the width direction. Welding and sealing are performed, and at the same time, the intermediate portions of the seal portions 8b, 8b are cut by fusing heater 26b to form seal portions on the main body side of the resin tube 8 and the single bag 8a side, as shown in FIG. It can be separated into upper and lower parts in the middle of 8b and 8b.

As shown in FIG. 6, the above-mentioned fusing heater 26b
By separating the heat press heads 26, 26 with the resin tubes 8 welded at predetermined intervals without energizing them, it is possible to form a continuous sealed bag 32 in which the single bags 8a are connected, and this invention has been implemented. The present invention is not limited to the example configuration.

The conveyance means constituting this invention corresponds to the sprocket 16, chain 17, and drive motor 19 of the above-mentioned embodiment, and the bag body includes a resin tube 8, a single bag 8a,
The packaging means corresponds to the configuration of the packaging device 10 , and the counting means corresponds to the optical sensor 20 .

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, in which Fig. 1 is a vertical sectional side view of the spring processing device, Fig. 2 is a side view of the packaging device, Fig. 3 A to D are explanatory diagrams of the operation of the packaging device, and Fig. 4 is a side view of the packaging device. Ho to Ho of the figures are enlarged side views of a heat press head showing another example, Fig. 5 is a plan view of a single bag formed by the heat press head of Fig. 4, and Fig. 6 is a continuous seal bag in which a spring is packaged. FIG. 1... Spring processing device, 2... Device body, 3...
Heat treatment furnace, 3a... entrance/exit, 3b... heater, 4... spring, 5... saucer, 7... cooling section, 8... resin tube, 8a... single bag, 10... packaging device, 17...
Chain, 20... Optical sensor, 32... Continuous seal bag.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A heat treatment furnace having a heater installed therein and an entrance/exit formed is disposed in the upper part of the apparatus body, and a receiving tray for storing a spring is placed inside the heat treatment furnace, A hopper is provided above the entrance and exit of the heat treatment furnace to allow the unheated spring to flow down to a receiving tray moved to the outside of the entrance and exit of the heat treatment furnace. A spring processing device, further comprising a cooling section for storing and cooling the spring after heat treatment, and a packaging means for storing the spring in a bag at a lower part of the cooling section. 2. The spring processing device according to claim 1, wherein the hopper is provided with a counting means for counting the number of springs inserted.