Socket for nut runner, bolt holding tool change socket for nut runner, and bolt holding tool change mechanism

Abstract

To provide a socket for a nut runner which can be fed to a next step holding a screw with a simple structure, a bolt hold tool change socket for the nut runner using the same, and a bolt hold tool change mechanism using the same.SOLUTION: This socket for the nut runner comprises: a grip surface; and a pressure mechanism. The grip surface has a perpendicular surface roughly perpendicular to the center axis of the socket, and one or more pairs of inclined surfaces, and can come into contact with a nut. Preferably, an angle α1 formed between one surface of each of the inclined surfaces and the center axis of the socket is roughly equal to an angle α2 formed between the other surface making the pair with the inclined surface and the center axis of the socket. The angle α1 is preferably 30-90 degrees.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a socket for a nut runner, a bolt holding tool change socket for a nut runner, and a bolt holding tool change mechanism.

Background Art

[0002] By introducing industrial robots, it is possible to replace human work, thereby reducing the training cost of workers and preventing unevenness in work. Prior art document 1 discloses an invention in which a torque tube is used in an automatic screw tightening machine that combines an industrial robot and a screw tightening machine (nut runner).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The advantages of using industrial robots are improved productivity, quality stabilization, labor saving, etc. by reducing the number of processes involving humans. When a nut runner is connected to an automatic tool changer (hereinafter also referred to as "ATC") and used, even in the process of holding a screw at the tip of the nut runner and supplying and tightening the screw to a mating part such as a part to be tightened, it is preferable to automate and avoid human intervention. However, there are problems such as the need for high positioning accuracy when the nut runner tightens the screw, the complexity of the mechanism, and the need for a large space, which have hindered automation.

Means for Solving the Problems

[0005] The inventor of the present invention has intensively studied to solve the above problems, and has developed a socket for a nut runner with a simple structure that can hold a screw and be supplied to the next process, a bolt hold tool change socket using the same, and a bolt hold tool change mechanism using the same.

[0006] The present invention has been made to solve the above problems, and includes the following [1] to

[18] . [1] A socket for a nut runner, the socket having a gripping surface and a pressing mechanism, the gripping surface having a vertical surface substantially perpendicular to the central axis of the socket and one pair or two or more pairs of inclined surfaces, the gripping surface being capable of contacting a screw, a socket for a nut runner. [2] A socket for a nut runner, the socket having a gripping surface and a pressing mechanism, the gripping surface having a vertical surface substantially perpendicular to the central axis of the socket and one pair or two or more pairs of inclined surfaces, the gripping surface being capable of contacting a screw, and an angle α1 formed between one surface of the inclined surface and the central axis of the socket being substantially the same as an angle α2 formed between the other surface of the pair of inclined surfaces and the central axis of the socket, a socket for a nut runner. [3] A socket for a nut runner, the socket having a gripping surface and a pressing mechanism, the gripping surface having a vertical surface substantially perpendicular to the central axis of the socket and one pair or two or more pairs of inclined surfaces, the gripping surface being capable of contacting a screw, and the pressing mechanism having an elastic body, a socket for a nut runner. [4] A socket for a nut runner, the socket having a gripping surface and a pressing mechanism, the gripping surface having a vertical surface substantially perpendicular to the central axis of the socket and one pair or two or more pairs of inclined surfaces, the gripping surface being capable of contacting a screw, an angle α1 formed between one surface of the inclined surface and the central axis of the socket being substantially the same as an angle α2 formed between the other surface of the pair of inclined surfaces and the central axis of the socket, and the angle α1 being 30 to 90 degrees, a socket for a nut runner. [5]A socket for a nut runner, the socket having a gripping surface and a pressing mechanism, the gripping surface having a vertical surface substantially perpendicular to the central axis of the socket and one or two or more inclined surfaces, the gripping surface being capable of contacting a screw, and an angle α1 formed between one surface of the inclined surface and the central axis of the socket being substantially the same as an angle α2 formed between the other surface of the pair of inclined surfaces and the central axis of the socket, the pressing mechanism being a socket for a nut runner having an elastic body. [6]A socket for a nut runner, the socket having a gripping surface and a pressing mechanism, the gripping surface having a vertical surface substantially perpendicular to the central axis of the socket and one or two or more inclined surfaces, the gripping surface being capable of contacting a screw, and an angle α1 formed between one surface of the inclined surface and the central axis of the socket being substantially the same as an angle α2 formed between the other surface of the pair of inclined surfaces and the central axis of the socket, the angle α1 being 30 to 90 degrees, the pressing mechanism being a socket for a nut runner having an elastic body.

[0007] [7]A socket for a nut runner and a bolt hold tool change socket for a nut runner having a one-touch attachment / detachment mechanism, the socket having a gripping surface and a pressing mechanism, the gripping surface having a vertical surface substantially perpendicular to the central axis of the socket and one or two or more inclined surfaces, the gripping surface being capable of contacting a screw, the bolt hold tool change socket for a nut runner. [8]A socket for a nut runner and a bolt hold tool change socket for a nut runner having a one-touch attachment / detachment mechanism, the socket having a gripping surface and a pressing mechanism, the gripping surface having a vertical surface substantially perpendicular to the central axis of the socket and one or two or more inclined surfaces, the gripping surface being capable of contacting a screw, and an angle α1 formed between one surface of the inclined surface and the central axis of the socket being substantially the same as an angle α2 formed between the other surface of the pair of inclined surfaces and the central axis of the socket, the bolt hold tool change socket for a nut runner. [9] A socket for a nut runner and a bolt hold tool change socket for a nut runner having a one-touch attachment / detachment mechanism, wherein the socket has a gripping surface and a pressing mechanism, the gripping surface has a vertical surface substantially perpendicular to the central axis of the socket and one pair or two or more pairs of inclined surfaces, the gripping surface can contact a screw, and the pressing mechanism is a bolt hold tool change socket for a nut runner having an elastic body.

[10] A socket for a nut runner and a bolt hold tool change socket for a nut runner having a one-touch attachment / detachment mechanism, wherein the socket has a gripping surface and a pressing mechanism, the gripping surface has a vertical surface substantially perpendicular to the central axis of the socket and one pair or two or more pairs of inclined surfaces, the gripping surface can contact a screw, the angle α1 formed by one surface of the inclined surface and the central axis of the socket is substantially the same as the angle α2 formed by the other surface that is a pair with the inclined surface and the central axis of the socket, and the angle α1 is 30 to 90 degrees.

[11] A socket for a nut runner and a bolt hold tool change socket for a nut runner having a one-touch attachment / detachment mechanism, wherein the socket has a gripping surface and a pressing mechanism, the gripping surface has a vertical surface substantially perpendicular to the central axis of the socket and one pair or two or more pairs of inclined surfaces, the gripping surface can contact a screw, the angle α1 formed by one surface of the inclined surface and the central axis of the socket is substantially the same as the angle α2 formed by the other surface that is a pair with the inclined surface and the central axis of the socket, and the pressing mechanism is a bolt hold tool change socket for a nut runner having an elastic body.

[12] A socket for a nut runner and a bolt hold tool change socket for a nut runner having a one-touch attachment / detachment mechanism, wherein the socket has a gripping surface and a pressing mechanism, the gripping surface has a vertical surface substantially perpendicular to the central axis of the socket and one pair or two or more pairs of inclined surfaces, the gripping surface can contact a screw, the angle α1 formed by one surface of the inclined surface and the central axis of the socket is substantially the same as the angle α2 formed by the other surface that is a pair with the inclined surface and the central axis of the socket, the angle α1 is 30 to 90 degrees, and the pressing mechanism is a bolt hold tool change socket for a nut runner having an elastic body.

[0008]

[13] A bolt-holding tool change socket for a nut runner and a bolt-holding tool change mechanism having a nut runner, wherein the bolt-holding tool change socket for the nut runner has a socket for the nut runner and a one-touch attachment / detachment mechanism, the socket has a gripping surface and a pressing mechanism, the gripping surface has a vertical surface substantially perpendicular to the central axis of the socket and one pair or two pairs or more of inclined surfaces, and the bolt-holding tool change mechanism in which the gripping surface can contact a screw.

[14] A bolt-holding tool change socket for a nut runner and a bolt-holding tool change mechanism having a nut runner, wherein the bolt-holding tool change socket for the nut runner has a socket for the nut runner and a one-touch attachment / detachment mechanism, the socket has a gripping surface and a pressing mechanism, the gripping surface has a vertical surface substantially perpendicular to the central axis of the socket and one pair or two pairs or more of inclined surfaces, the gripping surface can contact a screw, and an angle α1 formed by one surface of the inclined surface and the central axis of the socket is substantially the same as an angle α2 formed by the other surface that is a pair with the inclined surface and the central axis of the socket.

[15] A bolt-holding tool change socket for a nut runner and a bolt-holding tool change mechanism having a nut runner, wherein the bolt-holding tool change socket for the nut runner has a socket for the nut runner and a one-touch attachment / detachment mechanism, the socket has a gripping surface and a pressing mechanism, the gripping surface has a vertical surface substantially perpendicular to the central axis of the socket and one pair or two pairs or more of inclined surfaces, the gripping surface can contact a screw, and the pressing mechanism has an elastic body.

[16] A bolt holding tool change socket for a nut runner and a bolt holding tool change mechanism having a nut runner, wherein the bolt holding tool change socket for the nut runner has a socket for the nut runner and a one-touch attachment / detachment mechanism, the socket has a gripping surface and a pressing mechanism, the gripping surface has a vertical surface substantially perpendicular to the central axis of the socket and one pair or two or more pairs of inclined surfaces, the gripping surface can contact a screw, an angle α1 formed by one surface of the inclined surface and the central axis of the socket is substantially the same as an angle α2 formed by the other surface of the pair of inclined surfaces and the central axis of the socket, and the bolt holding tool change mechanism in which the angle α1 is 30 to 90 degrees.

[17] A bolt holding tool change socket for a nut runner and a bolt holding tool change mechanism having a nut runner, wherein the bolt holding tool change socket for the nut runner has a socket for the nut runner and a one-touch attachment / detachment mechanism, the socket has a gripping surface and a pressing mechanism, the gripping surface has a vertical surface substantially perpendicular to the central axis of the socket and one pair or two or more pairs of inclined surfaces, the gripping surface can contact a screw, an angle α1 formed by one surface of the inclined surface and the central axis of the socket is substantially the same as an angle α2 formed by the other surface of the pair of inclined surfaces and the central axis of the socket, and the bolt holding tool change mechanism having an elastic body as the pressing mechanism.

[18] A bolt holding tool change socket for a nut runner and a bolt holding tool change mechanism having a nut runner, wherein the bolt holding tool change socket for the nut runner has a socket for the nut runner and a one-touch attachment / detachment mechanism, the socket has a gripping surface and a pressing mechanism, the gripping surface has a vertical surface substantially perpendicular to the central axis of the socket and one pair or two or more pairs of inclined surfaces, the gripping surface can contact a screw, an angle α1 formed by one surface of the inclined surface and the central axis of the socket is substantially the same as an angle α2 formed by the other surface of the pair of inclined surfaces and the central axis of the socket, the angle α1 is 30 to 90 degrees, and the bolt holding tool change mechanism having an elastic body as the pressing mechanism.

Effect of the Invention

[0009] According to the present invention, it is possible to provide a socket for a nut runner, a bolt holding tool change socket for a nut runner using the same, and a bolt holding tool change mechanism using the same, which have a simple structure and can hold a screw and supply it to the next process.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0011] Hereinafter, the present invention will be described with reference to the drawings as necessary. FIG. 1 shows an embodiment of the socket for a nut runner of the present invention.

[0012] (Socket for Nut Runner) The socket 1 for a nut runner has a gripping surface 2 and a pressing mechanism 3. The socket 1 can be used, for example, at the tip of an ATC nut runner to supply and tighten a screw to a mating part such as a component while holding the inserted screw in the socket 1. The inner diameter of the socket 1 is preferably slightly larger than the outer diameter of the head of the screw to be used.

[0013] (Gripping surface) The gripping surface 2 is a surface located inside the socket 1. Part or all of the gripping surface 2 can be in contact with the bolt 21. The gripping surface 2 has a vertical surface 4 that is substantially perpendicular to the central axis 11 of the socket and one or two or more inclined surfaces 5.

[0014] (Vertical surface) The vertical surface 4 is substantially perpendicular to the central axis 11. When the bolt 21 is inserted into the socket 1, the head of the bolt 21 contacts the vertical surface 4. In the direction of the central axis 11, the socket 1 can hold the bolt 21 in the correct position. The vertical surface 4 may be a flat surface or a curved surface. The vertical surface 4 is preferably a substantially flat surface. Thereby, the contact area with the head of the bolt 21 can be ensured, and the bolt 21 can be stably held.

[0015] (Inclined surface) The inclined surface 5 is a surface provided to contact the bolt 21 at an angle different from that of the vertical surface 4 in order to hold the bolt 21. One or two or more pairs of the inclined surfaces 5 are provided so as to be paired. The angle α1 formed by one surface 5a of the inclined surface 5 and the central axis 11 of the socket is preferably substantially the same as the angle α2 formed by the other surface 5b that is paired with the inclined surface 5 and the central axis 11 of the socket. The surface 5a and the surface 5b are in a paired position that is substantially 180 degrees apart from the central axis 11, and the position can be corrected by appropriately contacting the bolt 21, and the bolt 21 can be set in the correct position.

[0016] As shown in Fig. 7, there are three pairs of inclined surfaces in this embodiment. The inclined surfaces 5a and 5b, the inclined surfaces 5c and 5d, and the inclined surfaces 5e and 5f are located at positions approximately 180 degrees apart on the same plane with the central axis interposed therebetween. It is preferable that the angle α1 is 30 to 90 degrees, more preferably 40 to 80 degrees, and even more preferably 60 to 75 degrees. The inclined surface 5 preferably engages with the corner or chamfered portion of the bolt 21, and is preferably designed according to the bolt used.

[0017] Axis misalignment refers to a state in which the central axis 12 of the bolt 21 is misaligned with the central axis 11 of the socket 11. When axis misalignment occurs, the positioning accuracy of the bolt 1 deteriorates, which hinders automation. As shown in Figs. 2 to 5, when axis misalignment occurs, the bolt 21 is inserted while the inclined surface 5b contacts the corner of the bolt 21, and the inclination of the bolt 21 is corrected. As a result, as shown in Figs. 1 and 6, the bolt 21 is positioned correctly within the socket 1. Also, the bolt 21 may be inserted until the bolt head contacts the vertical surface 4.

[0018] The inclined surface 4 may be a flat surface or a curved surface. Generally, chamfering of a screw is performed by obliquely cutting off a corner, so the chamfered surface is often a conical surface. Therefore, if the inclined surface 4 is a flat surface, it is preferable from the viewpoint of ensuring the contact area between the inclined surface 4 and the screw.

[0019] (Pressing mechanism) The pressing mechanism 3 contacts the inserted bolt 21 and applies a force by the power source 6 to hold the bolt 21 in the correct position. The power source 6 is not particularly limited as long as it can apply pressure and biasing force. Examples include vacuum adsorption; fluid pressure such as a compressor, hydraulic pressure, etc.; electric power; magnetic force; elastic force of an elastic body, etc. Among them, using an elastic body such as a spring is preferable in terms of cost and miniaturization. Examples of the elastic body include a coiled spring, a plate spring, etc. In this embodiment, elastic bodies 6a and 6b are used as the power source 6. There is no limitation on the number of the power sources 6, and a plurality of them may be arranged on the inner peripheral surface of the socket 1, or they may be arranged in pairs at positions 180 degrees with respect to the central axis 11. The locking member is circular, angular, spherical, pin-shaped, etc. made of metal, resin, etc., contacts the bolt, transmits the force from the power source, and has the function of stopping the bolt.

[0020] A stepped portion, which is a concave groove, is formed on the outer surface of the socket 1, and a through hole is formed in the stepped portion. An elastic body 6a and a locking ball 7a, and an elastic body 6b and a locking ball 7b are arranged in the stepped portion. The locking balls 7a and 7b have a smaller diameter than the through hole and are pressed by the elastic force of the elastic bodies 6a and 6b. A part of the locking balls 7a and 7b protrudes toward the inner surface of the socket 1. After the bolt 21 is inserted in the direction of the central axis 11, it is pressed by the elastic force of the elastic bodies 6a and 6b and held with a certain force. By pulling out the bolt 21 in the direction of the central axis 11, it can be easily separated from the socket 1. In this way, the socket 1 can hold and supply the bolt 21 without requiring special tools or personnel.

[0021] (Screw) The screw used in this embodiment is the bolt 21, but the screw may be either a male screw or a female screw, and may be a standard product defined by JIS, ISO, etc., or a special order product. The shape of the screw is not particularly limited, and it may be an even-sided polygon such as a hexagon, an octagon, or a decagon, or an odd-sided polygon such as a pentagon or a heptagon. When the socket 1 has three pairs of inclined surfaces, the bolt 21 is preferably a hexagon bolt. Similarly, when the socket 1 has four pairs of inclined surfaces, the bolt 21 is preferably an octagon bolt. When the socket 1 has five pairs of inclined surfaces, the bolt 21 is preferably a decagon.

[0022] (Nut runner bolt hold tool change socket) The bolt holding tool change socket 60 for a nut runner of the present invention has the above socket 1 and a one-touch attachment / detachment mechanism 51. The one-touch attachment / detachment mechanism 51 is a mechanism that can be attached and detached very easily. For example, by pushing, pulling, turning, etc., the nut runner and the above bolt holding tool change socket 60 can be attached and detached. Thereby, the attachment and detachment of both become easy, the labor of replacement is saved, and automation by a machine becomes possible. Examples of the one-touch attachment / detachment mechanism include a one-touch coupling, a locking adapter, a bit holder, etc.

[0023] (Bolt holding tool change mechanism) The bolt holding tool change mechanism 80 of the present invention has the above bolt holding tool change socket for a nut runner and a nut runner. The above nut runner 71 has a tool change base unit 72. By appropriately replacing the above bolt holding tool change socket 60 for a nut runner, it is possible to hold screws of various shapes and sizes and supply the screws to the object to be tightened.

Industrial applicability

[0024] According to the present invention, it is possible to provide a socket for a nut runner that can hold a screw with a simple structure, a bolt holding tool change socket for a nut runner using the same, and a bolt holding tool change mechanism using the same, so that they can be usefully utilized industrially.

Explanation of symbols

[0025] 1 Socket for nut runner 2 Gripping surface 4 Vertical surface 5a Inclined surface 6a Elastic body 7a Locking ball 11 Central axis 21 Bolt α1 Angle of the inclined surface 5a with respect to the central axis 11 Angle of the inclined surface 5b with respect to the α2 central axis 11

Claims

1. A socket for a nut runner, wherein the socket has a gripping surface and a pressing mechanism, the gripping surface has a vertical surface substantially perpendicular to the central axis of the socket and one pair or two or more pairs of inclined surfaces, the gripping surface is capable of contacting a screw, when the screw is inserted, the vertical surface, the inclined surfaces, and the pressing mechanism contact the screw, a part of the pressing mechanism protrudes from the inner surface of the socket, the portion of the protruding part closest to the central axis is located closer to the central axis than the side surface of the head of the inserted screw, a socket for a nut runner.

2. The socket for a nut runner according to claim 1, wherein an angle α1 formed between one surface of the inclined surface and the central axis of the socket is substantially the same as an angle α2 formed between the other surface of the pair of inclined surfaces and the central axis of the socket.

3. The socket for a nut runner according to claim 2, wherein the angle α1 is 30 degrees or more and less than 90 degrees.

4. The socket for a nut runner according to claim 1 or 2, wherein the pressing mechanism has an elastic body.

5. A bolt hold tool change socket for a nut runner having the socket according to claim 1 or 2 and a one-touch attachment / detachment mechanism.

6. A bolt hold tool change mechanism having the bolt hold tool change socket for a nut runner according to claim 5 and a nut runner.

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