JPH0415700Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tension spring separation device, and in particular to a tension spring separation device that automatically attaches a tension spring when assembling a pad receiving member to a seat frame of a seat. It is suitable for application to an automatic spring mounting device.

[Conventional technology]

BACKGROUND OF THE INVENTION As a cushion structure for a seat of a vehicle, for example, there is a cushion structure as disclosed in ``Kokoku Publication No. 1982-5882''.

In other words, this cushion structure is formed by stretching a plurality of wires between both side members of a seat frame disposed inside the seat, and inserting a separating member between the stretched wires. A pad receiving member is elastically stretched through a plurality of tension springs on both sides thereof,
This elasticity provides a comfortable cushioning effect.

The work of installing the tension spring when assembling the pad receiving member to the seat frame has traditionally been done manually, but in recent years this work has been automated using industrial robots. An automatic spring spring mounting device has been proposed.

In this automatic tension spring mounting device, the individually separated tension springs are mounted using an industrial robot, but hooks are formed at both ends of the tension springs. In the stored state, the tension springs have terminal hooks intertwined with each other, and it is necessary to separate them using a separating device when the tension springs are installed.

By the way, as a conventional device for separating springs of this type, there is one disclosed, for example, in ``Kokai No. 124775/1983.''

That is, in this spring separation device, a sorting member for dropping entangled springs is arranged in the feed path of a parts feeder, a surrounding member is arranged opposite to this sorting member, and one end of this surrounding member is arranged. The air blowing holes connected to the blowing device are positioned opposite to each other, so that the springs that have fallen onto the bottom plate of the surrounding member are blown away by the air ejected from the air holes, and fall from the drop opening of the surrounding member to the bottom of the parts feeder. It is configured.

[Problem that the invention attempts to solve]

However, this spring separation device has various drawbacks, such as a complicated structure and high manufacturing cost, since it uses an air blower to blow off the spring.

The present invention was developed in view of the above, and an object of the present invention is to provide a spring separation device that has a simple structure and can perform reliable separation.

[Means for solving problems]

In order to achieve the above object, the device of the present invention is formed at a predetermined position in a feeding path of a parts feeder that continuously transfers a tension spring having hook portions at both ends, and the tension spring is a narrow part having a width that allows only one person to pass through;
A convex portion formed at a predetermined position of the feed passage and having a required step with respect to the feeding direction of the tension spring, and a convex portion bent outward in an arc shape at the end of the feed passage, An abutting guide member that changes the direction of the tension spring sent from above to the outside, a U-shaped box provided corresponding to the abutting guide member into which the tension spring is dropped, and a U-shaped box into which the tension spring is dropped. A first rail member that is engaged with a hook portion on one side of a tension spring inserted therein is engaged with an end hook on the other side of the tension spring that has been transferred a predetermined distance along this first rail member. and a second rail member.

[Effect]

The measures described above operate as follows.

When the parts feeder is vibrated, the tension springs are moved along the feeding path, and when the tension springs pass through the narrow part during this movement, the tension springs are moved in a horizontally overlapping state. Since the width of the narrow part is the width of one spring, any tension spring that protrudes from this part will fall to the bottom of the parts feeder, and the tension spring with the terminal hooks intertwined with each other will protrude. When passing through the section, both tension springs are shifted due to the step of the convex section, and the end hooks are thereby untangled. Furthermore, the tension springs are finally separated into individual parts by hitting the arcuate surface of the abutting guide member and being turned outward, and the tension springs whose orientation has been changed in this way are then moved into the box. The end hook on one side is then engaged with the first rail member. At this time, if there is a tension spring whose end hooks are not disentangled, it will fall because it will not be engaged with the first rail member, and therefore only correctly separated tension springs will be selected. become. The tension spring continues to move along the first rail member due to the vibration of the parts feeder, and the end hook on the other side is eventually engaged with the second rail member, thereby causing the tension spring to move along the first rail member. Both terminal hooks are the first
and the second rail member is aligned while being engaged with the second rail member.

〔Example〕

Examples of the present invention will be described below with reference to the drawings.
A case will be described in which the present invention is applied to an automatic tension spring mounting device for automatically mounting a tension spring when assembling a pad receiving member to a seat frame.

1 shows the tension spring automatic mounting device as a whole, and 2 shows the hook part Sf in the same direction at both terminals.
This parts feeder 2 has a tension spring S separation mechanism, and the many tension springs S that have been fed are separated individually and sent to the linear feeder 3. It's like being sent out.

This parts feeder 2 has a spiral feeding passage 4 formed on its inner peripheral surface from the bottom to the top opening.
is moved along the inner wall,
Two narrow portions 5 are formed in the feed passage 4, the width of which is approximately the same as the outer diameter of the tension spring S.

Further, this feeding passage 4 is provided with two convex portions 6 that protrude in an inclined manner across the inner wall of the parts feeder 2 and the upper surface of the feeding passage 4.
The difference in level due to this convex portion 6 is the tension spring S
It is formed to be slightly larger than the outer diameter of.

At the end of the feed passage 4, an abutting guide member 7 is formed as a protuberance bent in an arc shape outward from the advancing direction of the feed passage.

In addition, a notch 8 is formed on the peripheral wall of the parts feeder 2 with a required length so that the terminal end of the feeding passage is exposed on the outer periphery. Continuous receiving part 2
A is formed, and an inclined surface portion 9 is formed above the receiving portion 2a and slopes downward from the notch portion 8. At one end of this inclined surface section 9, a U-shaped box 10 is provided with the same inclination as the inclined surface section 9, corresponding to the abutting guide member 7 at the terminal end of the feed passage 4. This box 10 is formed to a depth that allows the tension spring S to be inserted approximately half way in, and the tip of the upper side surface thereof is bent upward to be open.

A first rail member 11a extends along the peripheral wall of the parts feeder 2 from an intermediate position between the opening of the box 10 and the end of the feed passage 4 on the inclined surface portion 9.

Further, a notch-shaped falling part 12 is formed in the inclined surface part 9 adjacent to the box 10, and a second rail member 1 is formed from the lower edge of the other end facing the box 10.
1b extends in parallel with the first rail member 11a, and both rail members 11a and 11
The terminal end of b corresponds to the rear end of the parallel guide 3a formed on the linear feeder 3.

When a large number of tension springs S are put into the parts feeder 2 configured in this way and the parts feeder 2 is vibrated, the tension springs S move on the feeding path 4 from the bottom to the top opening due to the vibration. is continuously transported in the vertical direction.

When this tension spring S passes through the narrow part 5 of the feed passage 4, the width of the narrow part 5 is formed to the width of one tension spring S, so the tension spring S protrudes from this.
are dropped to the bottom of the parts feeder 2, thereby aligning the tension springs S in a line.

The tension springs S thus aligned in a line then pass through the convex portion 6, thereby disentangling the terminal hooks Sf.

That is, when the tension springs S whose terminal hooks Sf are entwined with each other ride on the convex part 6 and pass, the tension spring S that passed through the convex part 6 first is moved by the step of the convex part 6 to the rear tension spring S. It will be in a state where it will shift with respect to the spring S,
At this time, the terminal hooks of both tension springs S
Sf separates, and this untangles it.

The end hook Sf is separated by the two protrusions 6, and the tension spring S thus separated is brought into contact with the abutting guide member 7 at the end of the feed passage 4, and the tension spring S is separated from the protrusions 6. This guide member 7
is rotated along an arcuate plane and turned outward. As a result, the tension springs S are finally separated individually, and the tension springs S whose orientation has been changed are dropped into the box 10 from the terminal end of the feed passage 4, and at this time, one terminal hook Sf is locked to the first rail member 11a. At this time, in the tension spring S whose terminal hooks are not entangled with each other, since the terminal hook Sf is not locked to the rail member 11a,
It slides down the slope part 9 and falls from the falling part 12 to the receiving part 2.
It falls to the bottom of part a and is returned to the parts feeder 2 again.

The tension spring S, whose one end hook Sf is locked to the first rail member 11a, is
Subsequently, the vibration of the parts feeder 2 causes the inclined surface part 9 to move along the first rail member 11a, and when it crosses the falling part 12, the other terminal hook Sf also engages with the second rail member 11b at the other end. When the two end hooks Sf are combined, the rail members 11a and 1
Tension spring S in the state engaged with 1b
is fed onto the parallel guide 3a of the linear feeder 3 in the extending direction of the rail members 11a and 11b.

The tension spring S sent from the parts feeder 2 to the linear feeder 3 in this way is
Parallel guide 3a due to vibration of linear feeder 3
A supply chute 20 disposed corresponding to the front end of the
The tension spring S sent to the supply chute 20 is further sent to the supply chute 20
Once a certain number of tension springs S have been stocked, the delivery device 21 is actuated by the sensor 22 to release the required number of tension springs S. let it fall.

The tension spring S, which has fallen down the slope of the supply chute 20 in this manner, is pushed out to the tip of the supply chute 20, that is, to a catching portion by a setting device to be described later, by the actuation of the pusher 24 as detected by the proximity switch 23.

By repeating this operation, the tension spring S is continuously supplied to the tip of the supply chute 20, and the cylinder 26 is actuated by the detection of the proximity switch 23 provided at the tip of the supply chute 20 to remove the The member 27 is raised and the required number of tension springs S are taken out at the same time. In this way, the required number of tension springs S
When the tension springs S are taken out, a setting device 28 made of an industrial robot is activated, and a plurality of tension springs S are simultaneously captured by a manipulator 29 provided at the tip thereof, and then the sheet placed and fixed on the mounting table 30 is captured. It is transferred to the tension spring mounting section 31 of the frame F and mounted thereon.

In this operation, the tension spring S is
The terminal hook Sf is controlled by the first direction regulating member 32 provided above the take-out member 27, respectively.
The inclination of the end hook Sf is corrected, and when it is installed, the terminal hook Sf is guided by the second direction regulating guide 33 arranged corresponding to the tension spring installation part 31 of the seat frame F, so that the end hook Sf is smoothly installed. Installation will be carried out.

As described above, according to the automatic tension spring mounting device to which the separation device according to the present invention is applied, it is possible to completely automate the mounting work of the tension spring on the seat frame, which has conventionally been left to manual work.

[Effect of idea]

As described above, the tension spring separation device of the present invention allows the tension spring that protrudes from the narrow part to drop to the bottom of the parts feeder, and disentangles the end hooks from each other in the convex part. By changing the direction of the tension spring in this guide member, the terminal hooks are carefully disentangled, and when the tension spring whose direction has been changed is dropped into the box, the terminal hook on one side is firstly disentangled. Since the tension springs that are correctly separated are selected by engaging with the first rail member, the tension springs can be reliably supplied in a separated state. Moreover, this tension spring separation device has an extremely simple structure without requiring any particularly complicated mechanism, and therefore has the advantage that it can be manufactured at low cost.

[Brief explanation of drawings]

Fig. 1 is a plan view of the device of the present invention, Fig. 2 is a perspective view of the device, Fig. 3 is a vertical cross-sectional view, Fig. 4 is an enlarged perspective view of the main parts, and Fig. 5 is a perspective view of the device of the present invention. FIG. 2 is a schematic front view of an automatic tension spring mounting device to which the invention is applied. In the figure, 2 is a parts feeder, 4 is a feeding path,
5 is a narrow part, 6 is a convex part, 7 is an abutting guide member, 1
0 is a box, 11a is a first rail member, 11
b is the second rail member, S is the tension spring, and Sf is its end hook.

Claims (1)

[Claims for Utility Model Registration] Formed at a predetermined position in a feed passage of a parts feeder that continuously transports tension springs having hooks at both ends, only one tension spring can pass through in the vertical direction. a narrow portion having a width; a convex portion formed at a predetermined position of the feed passage and having a required step with respect to the feeding direction of the tension spring; an abutment guide member that is bent and protrudes to change the direction of the tension spring sent on the feeding path outward; A U-shaped box into which the tension spring is inserted, a first rail member to which the hook portion on one side of the tension spring that is inserted into the box is engaged, and a tension spring which is moved a predetermined distance along the first rail member. A tension spring separation device comprising: a second rail member to which a hook portion on the other side of the tension spring is engaged;