JP6963809B2 - Guide rail for bolts - Google Patents

Description

The present invention relates to, for example, a bolt guide rail for sequentially guiding a plurality of bolts in a bolt supply device for supplying bolts to a projection welding machine.

Conventionally, for example, the bolt (screw) supply device disclosed in Patent Document 1 includes a guide rail capable of guiding a plurality of first bolts from an upstream end to a downstream end. The guide rail has a groove-shaped guide portion in which the upper opening edge portion extends linearly, and a pair of stepped step portions are formed in the upper opening edge portion of the guide portion. In the upper half of both steps, the dimension between the standing walls corresponds to the width of the head of the first bolt, and the guide rail is inserted with the shaft of each first bolt inserted into the guide from above. When vibrated, each first bolt is guided along the bottom surface in the upper half of both stepped portions. On the other hand, the lower half portion of both stepped portions corresponds to the width dimension of the head of the second bolt whose dimension between the standing walls is smaller than the width dimension of the head of the first bolt. On the bottom surface of the middle part in the lower half of both stepped portions, wide portions extending in the horizontal direction and extending in the vertical direction are provided on both sides in the horizontal direction orthogonal to the extension direction of the guide portion, and the width dimension thereof is the width dimension of the head of the second bolt. It corresponds to the width dimension. Therefore, when the second bolt is mixed in each of the first bolts to be guided, the second bolt is guided along the lower half portion of both stepped portions instead of the upper half portion and reaches the wide portion. It falls downward and is not guided to the downstream end of the guide rail.

Japanese Unexamined Patent Publication No. 2010-131519

By the way, a guide rail as in Patent Document 1 is difficult to manufacture because it is necessary to form a stepped portion at the upper opening edge of the guide portion, and it is costly because a vibrating means for vibrating is required. There is a problem that it becomes bulky.

In order to deal with this, both steps are eliminated, the width dimension of the wide portion is made larger than the width dimension of the head of the second bolt, and the width dimension of the head of the first bolt is made smaller. Guides each first bolt downward while tilting the guide rail and sliding the head of each first bolt against a guide surface extending along the upper opening edge of the guide portion by the weight of each first bolt. It is conceivable to have a simple configuration.

However, with the above configuration, there is no restriction when the guide rail is guided by the guide portion of the second bolt in the horizontal direction intersecting the extending direction of the guide rail. Therefore, when the second bolt reaches the wide portion, for example. , The second bolt moves to one side in the horizontal direction by being sandwiched between the first bolt on the upstream side and the first bolt on the downstream side, and the head of the second bolt is on one side of the upper opening edge of the guide portion. There is a risk that it will be caught in the wide part and will not fall from the wide part.

The present invention has been made in view of these points, and an object of the present invention is to have a simple structure and to remove different kinds of bolts mixed in each of the guiding bolts on the way. The purpose is to provide costly guide rails for bolts.

In order to achieve the above object, the present invention is characterized in that the structure of a portion of the guide rail located upstream of the wide portion has been devised.

Specifically, the following solution measures were taken for the bolt guide rails that sequentially guide a plurality of first bolts from the upstream end to the downstream end.

That is, in the first invention, the upper opening edge portion forms at least one of a groove shape and a slit shape extending in a linearly inclined manner, and the shaft portion of the first bolt is inserted from above. A rail body having a guide portion for guiding the first bolt downward while sliding the head of the first bolt against a guide surface extending along the upper opening edge portion by the weight of the bolt is provided, and the guide portion of the guide portion is provided. the middle section is a space with Ru extending vertically extends on either side of the horizontal direction orthogonal to the extending direction of the guide portion, and the width dimension of the head in the first bolt d1, from the first bolt Assuming that the width dimension of the head of the second bolt, which is also small, is d2, the width dimension D satisfies d2 <D <d1 so that the first bolt is not dropped downward and the second bolt is dropped downward. The upstream guide portion, which is provided with a portion and is located on the upstream side of the wide portion in the rail body, is an upstream end of the inner peripheral surface of the wide portion and the guide surface when viewed from a horizontal direction orthogonal to the extension direction of the guide portion. It is characterized by having a structure in which the angle between the two is blunt.

In the second invention, in the first invention, the downstream end of the inner peripheral surface of the wide portion is provided at a distance in the horizontal direction orthogonal to the extension direction of the guide portion, and gradually approaches toward the downstream side. It is characterized in that a pair of inclined surfaces connected to a region on the downstream side of the wide portion of the guide portion are formed.

In the first invention, when the second bolt is guided by the guide portion, the head of the second bolt reaching the wide portion starts to enter the wide portion before the shaft portion. Then, for example, even if a force is applied from the first bolt located on the upstream side or the first bolt located on the downstream side with respect to the second bolt, the shaft portion does not enter the wide portion, so that the second bolt is the guide portion. The shaft portion is guided to the downstream side while the head is tilted to the downstream side without moving in the horizontal direction orthogonal to the extension direction of. Therefore, since the head of the second bolt does not get caught on the peripheral edge of the upper opening of the guide portion, the second bolt can be reliably dropped from the wide portion, and the second bolt can be reliably removed in the middle of the guide rail. Further, as compared with the guide rail as in Patent Document 1, it is not necessary to form a stepped portion in the guide portion, and further, no vibration means is required, so that the guide rail can be made at low cost.

In the second invention, when each of the first bolts guided by the guide portion passes through the wide portion, both inclined surfaces smoothly guide the shaft portion of each first bolt to the region downstream of the wide portion of the guide portion. Will come to do. Therefore, it is possible to reliably prevent the first bolt from staying in the wide portion and causing poor transportation.

It is a schematic front view of the bolt supply device provided with the guide rail which concerns on embodiment of this invention. FIG. 2 is a view taken along the line II of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. FIG. 3 is a cross-sectional view taken along the line IV-IV of FIG. FIG. 3 is a view corresponding to FIG. 3 showing a state immediately before the second bolt falls on the wide portion. FIG. 5 is a cross-sectional view taken along the line VI-VI of FIG. After FIG. 5, it is a figure which shows the state which the 2nd bolt is falling down the wide part.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is essentially merely an example.

FIG. 1 shows a bolt supply device 10 provided with a bolt guide rail 1 according to an embodiment of the present invention. The bolt supply device 10 is for sequentially supplying the first bolt 11 (see FIG. 4) composed of the head portion 11a and the shaft portion 11b to a projection welding machine (not shown), and has a rectangular frame-shaped pedestal 2 and a pedestal 2. A control panel 3 mounted inside the gantry 2, a parts feeder 4 arranged above the gantry 2 and sequentially dropping the first bolt 11 on the upstream portion of the guide rail 1, and arranged on the downstream side of the guide rail 1. It is provided with a bolt transport unit 5 that transports the first bolt 11 in a subsequent process by utilizing the air flow of compressed air.

The guide rail 1 can sequentially guide a plurality of first bolts 11 falling from the parts feeder 4 to the bolt transport unit 5, and if it is composed of a head portion 12a and a shaft portion 12b, the guide rail 1 and the first bolt 11 When guiding the second bolt 12 of a different type, the guidance to the bolt transport unit 5 can be stopped in the middle by dropping the second bolt 12 below the guide rail 1 in the middle of the guidance.

As shown in FIGS. 2 and 3, the guide rail 1 includes a rail body 6 having an elongated rectangular parallelepiped shape forming a straight line, and the rail body 6 is inclined so that an angle α formed with a horizontal plane is 30 degrees. It is arranged in a cuboid position.

As shown in FIG. 2, the rail main body 6 includes a pair of strip-shaped main body frames 7 having a thickness arranged at predetermined intervals in the horizontal direction so that the plate surfaces face each other, and both of them. A pair of bridge frames 8 for bridging the lower ends and the lower ends of the main body frame 7 are provided, and the dimension between the two main body frames 7 corresponds to the diameter of the shaft portion 11b of the first bolt 11. ing.

That is, the rail body 6 has a guide portion 6a having a U-shaped cross section in which the upper end portion and the lower end portion open upward and a slit shape in the middle portion, and the upper opening of the guide portion 6a. As shown in FIG. 3, the edge portion extends so as to be linearly inclined. Then, when the shaft portion 11b of the first bolt 11 is inserted from above, the guide portion 6a extends the head portion 11a of the first bolt 11 along the upper opening edge portion to the guide surface 6d due to the weight of the first bolt 11. The first bolt 11 is guided from the upstream end to the downstream end of the rail body 6 while being slidably contacted.

A wide recess 9 extending straight up and down is formed in the middle of the plate surfaces of the main body frames 7 facing each other, and the recess 9 has a strip-shaped bottom surface 9a extending straight up and down and an upstream of the strip-shaped bottom surface 9a. The first inner side surface 9b extending from the side edge portion in a direction orthogonal to the strip-shaped bottom surface 9a, and the second inner surface extending inclined toward the main body frame 7 side facing each other gradually from the downstream side edge portion of the strip-shaped bottom surface 9a toward the downstream side. It has a side surface 9c (inclined surface).

That is, a wide portion 6b composed of both recesses 9 is provided in the middle portion of the guide portion 6a, and the wide portion 6b extends to both sides in the horizontal direction orthogonal to the extension direction of the guide portion 6a and in the vertical direction. It has a shape that extends to. Therefore, the upstream guide portion 6c located on the upstream side of the wide portion 6b in the rail body 6 is the first inner end of the inner peripheral surface of the wide portion 6b when viewed from the horizontal direction orthogonal to the extension direction of the guide portion 6a. The structure is such that the angle β formed by the side surface 9b and the guide surface 6d for guiding the first bolt 11 in the upstream guide portion 6c of the rail body 6 is 120 degrees.
As for the width dimension D of the wide portion 6b, assuming that the width dimension of the head 11a of the first bolt 11 is d1 and the width dimension of the head 12a of the second bolt 12 is d2, as shown in FIG. 4, d2 < D <d1 is set.

Further, both second inner side surfaces 9c are located at the downstream end of the inner peripheral surface of the wide portion 6b, and are paired with each other separated in the horizontal direction orthogonal to the extension direction of the guide portion 6a, and go to the downstream side. As it gradually approaches, it extends and is connected to a region on the downstream side of the wide portion 6b in the guide portion 6a.

Next, the movement of the second bolt 12 when the second bolt 12 is mixed in each of the first bolts 11 guided by the guide rail 1 will be described in detail.

First, as shown in FIG. 3, each of the first bolts 11 stored in the parts feeder 4 falls into the upstream guide portion 6c in order from above, and the shaft portion 11b is inserted into the guide portion 6a and the head is inserted. The portion 11a comes into contact with the upper surface of the upstream guide portion 6c.

Next, the guide portion 6a lowers the first bolt 11 while sliding the head portion 11a of the first bolt 11 against the guide surface 6d extending along the upper opening edge of the guide portion 6a by the weight of the first bolt 11. I will guide you to. At this time, as shown in FIG. 4, since the width dimension d1 of the head 11a in the first bolt 11 is larger than the width dimension D of the wide portion 6b, the first bolt 11 is dropped downward in the wide portion 6b. Instead, it is guided to the bolt transfer unit 5 by the guide portion 6a.

When each of the first bolts 11 guided by the guide portion 6a passes through the wide portion 6b, as shown in FIG. 2, both inclined second inner side surfaces 9c guide the shaft portion 11b of each first bolt 11 to the guide portion 6a. Smoothly guides to the area on the downstream side of the wide portion 6b in the above. Therefore, it is possible to reliably prevent the first bolt 11 from staying in the wide portion 6b and causing a transport failure.

On the other hand, when the second bolt 12 is mixed with the first bolt 11 group falling from the parts feeder 4, the shaft portion 12b of the second bolt 12 is inserted into the guide portion 6a and the head portion 12a is inserted as shown in FIG. It comes into contact with the guide surface 6d. Then, the second bolt 12 is guided downward by the guide portion 6a in the same manner as the first bolt 11.

When the second bolt 12 guided downward by the guide portion 6a reaches the wide portion 6b, as shown in FIG. 6, the width dimension d2 of the head 12a in the second bolt 12 is larger than the width dimension D of the wide portion 6b. Is also small, so it begins to fall downward in the wide portion 6b. At this time, since the angle β formed by the first inner side surface 9b and the guide surface 6d in the rail body 6 is 120 degrees, as shown in FIG. 5, the portion 6e forming the first inner side surface 9b in the upstream guide portion 6c. (A portion having a triangular shape when viewed from the horizontal direction orthogonal to the extension direction of the guide portion 6a in FIG. 3) causes the head portion 12a to start entering the wide portion 6b before the shaft portion 12b. Then, since the shaft portion 12b of the second bolt 12 does not enter the wide portion 6b, for example, the first bolt 11 located on the upstream side or the first bolt 11 located on the downstream side with respect to the second bolt 12 Even if a force is applied from the guide portion 6a, the shaft portion 12b is guided to the downstream side while the head portion 12a is tilted to the downstream side without moving in the horizontal direction orthogonal to the extension direction of the guide portion 6a. Therefore, since the head portion 12a of the second bolt 12 does not get caught in the upper opening peripheral edge of the guide portion 6a, the second bolt 12 surely falls from the wide portion 6b, and the second bolt 12 is surely removed in the middle of the guide rail 1. It is possible to prevent the bolt transfer unit 5 from being guided.

As described above, in the guide rail 1 of the embodiment of the present invention, even if the second bolt 12 is mixed in the first bolt 11 group to be guided, the second bolt 12 can be removed in the middle.

Further, as compared with the guide rail as in Patent Document 1, it is not necessary to form a stepped portion in the guide portion, and further, since no vibration means is required, the guide rail 1 can be made with a simple structure and low cost.

In the guide portion 6a of the embodiment of the present invention, the upper end portion and the lower end portion have a groove shape and the middle portion has a slit shape, but the present invention is not limited to this, and the upper end portion of the guide portion 6a excluding the wide portion 6b is excluded. The portion extending from the upper end to the lower end may be groove-shaped, or the portion extending from the upper end to the lower end of the guide portion 6a may be slit-shaped.

Further, in the embodiment of the present invention, the angle β formed by the upstream guide portion 6c of the rail body 6 between the first inner side surface 9b, which is the upstream end of the inner peripheral surface of the wide portion 6b, and the guide surface 6d of the rail body 6 is 120. Although it has a structure of degrees, the angle β does not have to be 120 degrees, and the angle β may be an obtuse angle.

Further, in the embodiment of the present invention, the rail body 6 has a linear shape, but the present invention is not limited to this, and if the upper opening edge portion of the guide portion 6a is linearly inclined, other shapes may be used. There may be.

Although the guide rail 1 of the embodiment of the present invention is applied to a part of the bolt supply device 10, it may be applied to a part of other devices.

The present invention is suitable, for example, for a bolt guide rail that sequentially guides a plurality of bolts in a bolt supply device for supplying bolts to a projection welding machine.

1 Guide rail 6 Rail body 6a Guide part 6b Wide part 6c Upstream guide part 6d Guide surface 9c Second inner surface (inclined surface)
11 1st bolt 11a Head 11b Shaft 12 2nd bolt 12a Head D Width dimension of wide part d1 Width dimension of head in 1st bolt d2 Width dimension of head in 2nd bolt

Claims (2)

A bolt guide rail that sequentially guides a plurality of first bolts from the upstream end to the downstream end.
The first bolt is formed by the weight of the first bolt in a state where the upper opening edge portion forms at least one of a groove shape and a slit shape extending linearly and extends, and the shaft portion of the first bolt is inserted from above. The rail body is provided with a guide portion for guiding the first bolt downward while sliding the head of the bolt against a guide surface extending along the upper opening edge portion.
The intermediate portion of the guide portion, a space with Ru extending vertically extends on either side of the horizontal direction orthogonal to the extending direction of the guide portion, and the width dimension of the head in the first bolt d1, the Assuming that the width dimension of the head of the second bolt smaller than the first bolt is d2, the width dimension D satisfies d2 <D <d1 so that the first bolt is not dropped downward and the second bolt is lowered. A wide part is provided to drop it into the
The upstream guide portion located upstream of the wide portion of the rail body has an angle formed by the upstream end of the inner peripheral surface of the wide portion and the guide surface when viewed from the horizontal direction orthogonal to the extension direction of the guide portion. A guide rail for bolts characterized by an obtuse angle structure. In the bolt guide rail according to claim 1,
The wide end of the inner peripheral surface of the wide portion is provided at a distance in a horizontal direction orthogonal to the extension direction of the guide portion, and is inclined so as to gradually approach the guide portion toward the downstream side. A guide rail for bolts, characterized in that a pair of inclined surfaces connected to a region on the downstream side of the portion are formed.

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