JP6980187B2 - Tightening member tightening machine and socket for tightening member tightening machine - Google Patents

Description

INDUSTRIAL APPLICABILITY According to the present invention, a tightening member tightening machine and a socket for a tightening member tightening machine that perform tightening work or loosening work of tightened members such as bolts and nuts used when fixing rails of railway tracks. It is about.

Conventionally, a tightening member tightening machine for tightening or loosening a tightening member such as a bolt or a nut used for fixing a rail of a railway track has been known. For example, it is equipped with a transport vehicle in which the wheels loaded on the two rails are rotatably arranged, and a socket that can be fitted to the fastening part that fixes the rails, and gives rotation to the socket and extends the direction of the socket. It consists of a tightening tool that can be reciprocated, and has a contact wheel portion in which the wheel portion constantly contacts the upper surface of the rail, and a flange portion arranged on both side surfaces of the contact wheel portion. A tightened member tightening machine is known in which at least one of the two flange portions is arranged so that the side surfaces of the two flange portions facing each other are arranged with a slight gap so as not to interfere with the side surface of the rail (Patent Document 1). reference).

Japanese Unexamined Patent Publication No. 2014-198940

However, in the device of Patent Document 1, since a universal joint is installed between the socket and the motor that imparts rotation to the socket, the axis of the tightened member and the tightening member may be tightened depending on the arrangement interval of the tightened member or the like. Even if the axes of the attached tool do not match, the tightening work or loosening work of the member to be tightened can be performed, but it is necessary for the operator to perform an operation to align the axes with each other. There was a concern that the tightening work or loosening work of the member to be tightened would be complicated.

Therefore, the present invention solves such a problem, and even when the axes of the tightening member and the tightening tool do not match each other, the work can be easily performed and the operator can perform the work. It is an object of the present invention to provide a tightening member tightening machine and a socket for a tightening member tightening machine capable of reducing the burden on the tightening member.

In order to solve the above-mentioned problems, the tightening member tightening machine according to claim 1 of the present invention tightens the tightened members such as bolts and nuts used for fixing the rail of the railroad track. Alternatively, a tightening tool that applies a rotational force when loosening, a bottom surface that faces the head of the tightened member when the tightening tool rotates, a concave guide portion that slides into contact with the head of the tightened member, and the above. A socket that is eccentrically connected in the region of the guide portion, has a fitting portion that can be fitted to the outer shape of the head of the member to be tightened, and is connected to the tightening tool, and the tightening portion. The axis of the tightening tool can be moved when the drive portion that makes the tool movable and the tightening tool that guides the head of the member to be tightened from the guide portion to the fitting portion are rotated. It is characterized by being provided with a means of transportation.

Further, the tightened member tightening machine according to claim 2 of the present invention is the tightened member tightening machine according to claim 1, wherein the guide portion has a diameter from the axial center side of the fitting portion. It is characterized by having a recessed portion recessed in the bottom surface over the outer side of the direction.

Further, the tightening member tightening machine according to claim 3 of the present invention is the tightening member tightening machine according to claim 1 or 2, wherein the fitting portion is a guide portion during rotation. It is formed close to the inner position of the rotation locus formed by the inner surface.

Further, the tightening member tightening machine according to claim 4 of the present invention is the tightening member tightening machine according to any one of claims 1 to 3, wherein the socket is rotated. Occasionally, by pressing the head of the tightened member downward at the socket tip portion of the socket in which the guide portion and the fitting portion are formed, the socket connecting portion connected to the socket tip portion is lowered. It is equipped with an urging means for accumulating urging force by moving it to.

Further, the tightening member tightening machine according to claim 5 of the present invention is the tightening member tightening machine according to any one of claims 1 to 4, wherein the socket is the induction. A tapered portion for guiding the head of the member to be tightened is formed at the boundary between the portion and the fitting portion.

Further, the tightening member tightening machine according to claim 6 of the present invention is the tightening member tightening machine according to any one of claims 1 to 5, wherein the moving means moves. It is provided with an origin return means for returning the axis of the tightening tool to the origin position before the movement.

Further, in the tightening member tightening machine according to claim 7 of the present invention, the socket is connected in the tightening member tightening machine according to any one of claims 1 to 6. A unit portion that accommodates at least the tightening tool, the drive portion, and the moving means is installed in a transport vehicle having a wheel portion capable of traveling on rails.

Further, the tightening member tightening machine according to claim 8 of the present invention is the tightening member tightening machine according to any one of claims 1 to 7, wherein the moving means is the above. It is composed of a first movable table that is movably fixed to a base portion connected to a drive unit and a second movable table that is movably fixed in a direction different from that of the first movable table. be.

Further, the socket for the tightening member tightening machine according to claim 9 of the present invention rotates when tightening or loosening the tightened member such as bolts and nuts used for fixing the rail of the railway track. A socket for a tightening member tightening machine, which is configured to include at least a tightening tool for applying a force and a moving means for moving the axis of the tightening tool. The socket connecting portion connected to the tightening tool, the concave guide portion that is in sliding contact with the head of the member to be tightened when the tightening tool is rotated, and the inside of the guide portion within the region of the guide portion. With a socket tip portion formed at a position close to or in contact with the side surface, having a fitting portion that can be fitted to the outer shape of the head of the tightened member, and being connected to the socket connecting portion via an urging means. It is characterized by having.

According to the tightening member tightening machine and the socket for the tightening member tightening machine of the present invention, the socket having the guide portion and the fitting portion and the moving means for moving the axis of the tightening tool are provided. Therefore, even if the axis of the tightened member and the axis of the tightening tool do not match due to the arrangement interval of the tightened member, the socket moves to the position of the tightened member as it rotates. It can be moved to align the axes of both, and the tightening work or loosening work can be easily performed.

It is a schematic front view of the tightening member tightening machine in 1st Embodiment of this invention. It is a partially omitted plan view of the unit part before moving of the tightening member tightening machine in 1st Embodiment of this invention. FIG. 5 is an enlarged view of a partially omitted portion of FIG. 2AA of the tightening member tightening machine according to the first embodiment of the present invention. FIG. 2 is an enlarged side view of a partially omitted portion of FIG. 2B of the tightening member tightening machine according to the first embodiment of the present invention. It is a perspective view of the moving means of the tightening member tightening machine in 1st Embodiment of this invention. It is explanatory drawing of the socket before fitting of the tightening member tightening machine in 1st Embodiment of this invention. It is explanatory drawing of the socket after fitting of the tightening member tightening machine in 1st Embodiment of this invention. It is a partially omitted plan view of the unit part after the movement of the tightening member tightening machine in 1st Embodiment of this invention. It is explanatory drawing of the socket before fitting of the tightening member tightening machine in the 2nd Embodiment of this invention. It is explanatory drawing of the socket after fitting of the tightening member tightening machine in the 2nd Embodiment of this invention.

Hereinafter, the tightened member tightening machine and the socket for the tightened member tightening machine according to the embodiment of the present invention will be described with reference to the drawings. The tightening member tightening machine runs a transport vehicle 10 capable of traveling on two rails R, and tightens bolts, nuts, and other tightened members B at predetermined positions for fixing the rails R. Even if the loosening work is performed and the axes of the tightening member B and the tightening tool 20 do not match each other, the socket 30 and the moving means 60 connected to the tightening tool 20 are used. It is possible to easily perform tightening work or loosening work by matching the axes with each other.

In the tightening member tightening machine, the direction of the other rail R installed adjacent to one rail R is the left-right direction or the X direction of the tightening machine. Further, the traveling direction of the transport vehicle 10 is the front of the tightening machine, the backward direction is the rear of the tightening machine, and the advancing / retreating direction of the transport vehicle 10 is the Y direction of the tightening machine. Further, the direction in which the rail R is installed is below the tightening machine, the transport vehicle 10 side on the rail R is above the tightening machine, and the vertical direction is the Z direction of the tightening machine.

As shown in FIGS. 1 to 5, the tightening member tightening machine according to the present invention mainly includes a transport vehicle 10 having a wheel portion 12 capable of traveling on the rail R and a tightening member of the rail R. A tightening tool 20 that applies a rotational force when tightening or loosening B, a socket 30 that is connected to the tightening tool 20, a drive unit 50 that allows the tightening tool 20 to move up and down, and a tightening tool 20. It is provided with a moving means 60 that makes it possible to move the axis of the tightening tool 20 during rotation.

As shown in FIG. 1, the transport vehicle 10 is capable of traveling on the rail R of the railway track to a predetermined position where the tightening work or the loosening work of the tightened member B is performed. A pair of wheel portions 12 capable of traveling on the rail R and a misalignment prevention mechanism 13 are installed on the lower side of the base 11 in the transport vehicle 10.

Further, on the upper side of the base 11 of the transport vehicle 10, a unit unit 14 located above each rail R during traveling, an operation unit 15 for operating the transport vehicle 10, a tightening tool 20, and a drive unit are provided. A control unit 16 that controls the 50 and a power supply unit 17 that drives the control unit 16, the tightening tool 20 installed in the unit unit 14, the drive unit 50, and the like are installed.

As shown in FIGS. 2 to 5, the tightening tool 20 is connected to the control unit 16 and the power supply unit 17, and applies a rotational force when the tightened member B of the rail R is tightened or loosened. be. The tightening tool 20 is composed of, for example, an impact type tightening tool, a nut runner, etc., is rotated at a predetermined rotation speed and a predetermined torque according to the drive control information of the control unit 16, and is rotated at a predetermined speed by the drive unit 50. Move up and down.

The tightening tool 20 is installed in the unit portion 14 in the vertical direction so as to correspond to the position of the tightened member B fixed to both left and right ends of each rail R. In this embodiment, since each rail R is fixed by two left and right tightening members B, two tightening tools 20 are installed in the unit portion 14. That is, a plurality of unit portions 14 are installed on the transport vehicle 10 according to the number of rails R.

Further, when the tightening tool 20 is connected to the moving means 60 described later in the unit portion 14, the axes of the tightening member B fixing the rail R and the tightening tool 20 do not match each other. Even if there is, it is configured to be movable by the moving means 60.

The socket 30 is connected to the lower end of the tightening tool 20, and is fitted to the tightened member B of the rail R to tighten the tightened member B by the rotational force transmitted from the tightening tool 20. Or loosen it. As shown in FIG. 1, the socket 30 projects downward from the base 11 of the transport vehicle 10 in order to shorten the moving distance until it moves to the tightened member B during the tightening work or the loosening work. It is desirable, but not limited to, the tightening tool 20 to be installed in such a manner.

As shown in FIGS. 6 and 7, the socket 30 has a socket connecting portion 31 connected to the tightening tool 20 and a socket tip portion 32 that is movable with respect to the socket connecting portion 31 via the urging means 33. It is composed of and. More specifically, the socket 30 is urged between the socket connecting portion 31 and the socket tip portion 32 when an acting force for moving the socket connecting portion 31 downward so as to be close to the socket tip portion 32 is applied. When the urging force by the means 33 is accumulated and the acting force is removed, the socket tip portion 32 is configured to move downward with the socket connecting portion 31 as a reference by the accumulated urging force.

Specifically, as shown in the figure, an engaging hole (not shown) that allows the engaging portion (not shown) of the tightening tool 20 to be engaged in the central portion of the upper end portion of the socket connecting portion 31 (not shown). Is formed, and a shaft portion 34 projecting downward is provided at the lower end portion of the socket connecting portion 31. Further, on the lower side of the shaft portion 34, a guide pin 35 is provided so as to project so as to be orthogonal to the axis of the shaft portion 34.

Further, the socket tip portion 32 has a base portion 36 formed in a substantially cylindrical shape so that the shaft portion 34 of the socket connecting portion 31 can be inserted, and the guide pin of the shaft portion 34 is provided in the base portion 36. A guide hole 37 through which the 35 can be inserted is formed in the vertical direction. The socket connecting portion 31 is connected to the socket tip portion 32 via the base portion 36. Further, the base portion 36 is formed so that the lower end portion expands in diameter in the outer diameter direction, and has a bottom surface facing the head of the tightened member, and the bottom surface 38 of the base portion 36 has a bottom surface 38. A guide portion 39 that is in sliding contact with the tightened member head B1 when the tightening tool 20 is rotated, and a fitting portion 40 that is eccentric from the guide portion 39 and can be fitted to the outer shape of the tightened member head B1 are formed. ing. At this time, the fitting portion 40 is formed so that the center of the fitting portion 40 is located on substantially the same straight line with respect to the axis of the tightening tool 20.

The guide portion 39 is formed in a circular shape through a step so as to be concave with respect to the bottom surface 38 of the base portion 36, and within the region of the guide portion 39, the center of the fitting portion 40 and the socket 30 are formed. The fitting portion 40 is continuously provided on the upper side of the guide portion 39 so that the axis is substantially in the same linear shape. That is, the center of the guide portion 39 is formed so as to be eccentric from the center of the fitting portion 40 in the outer diameter direction, and the fitting is formed in a polygonal shape so as to fit the outer shape of the head B1 of the tightened member. It is formed so that the opening of the joint portion 40 and a part of the guide portion 39 communicate with each other.

At this time, the fitting portion 40 is formed close to the inner position of the rotation locus formed by the inner surface of the guide portion 39 when the tightening tool 20 is rotated. In other words, it is formed in the region of the guiding portion 39 at a position close to or in contact with the inner surface of the guiding portion 39. As a result, when the tightening tool 20 is rotated, the tightened member head B1 is in sliding contact with the inner surface of the guide portion 39, so that the tightened member head B1 can be guided to the fitting portion 40. ..

Further, it is desirable that the guide portion 39 has a large diameter with respect to the bottom surface 38 of the base portion 36 in order to facilitate holding of the head portion B1 of the clamped member. Further, it is desirable to provide a tapered portion 41 at the boundary between the guiding portion 39 and the fitting portion 40 for smoothly guiding the tightened member head B1 from the guiding portion 39 to the fitting portion 40.

The socket connecting portion 31 and the socket tip portion 32 configured in this way insert the guide pin 35 of the shaft portion 34 in the socket connecting portion 31 into the guide hole 37 of the base portion 36 in the socket tip portion 32, and connect the socket. The socket 30 is configured by interposing an elastic member such as a spring serving as an urging means 33 between the portion 31 and the socket tip portion 32. As a result, the axial centers of the socket connecting portion 31 and the socket tip portion 32 can be arranged in the same linear shape, and the rotational force of the tightening tool 20 can be coaxially transmitted to the socket tip portion 32. can.

As shown in FIGS. 2 to 5, the drive unit 50 is connected to the control unit 16 and the power supply unit 17, and enables the tightening tool 20 to move up and down. The drive unit 50 is installed in the unit unit 14 in the moving means 60 that makes it possible to move the axis of the tightening tool 20 when the tightening tool 20 rotates. In other words, the moving means 60 is configured to be vertically movable together with the tightening tool 20 by the driving unit 50 in the unit unit 14. Here, the unit unit 14 that houses the tightening tool 20, the drive unit 50, the moving means 60, and the like will be described.

As shown in FIGS. 1 to 5, the unit unit 14 is formed of a substantially octagonal cylindrical body 14a having an open bottom, and is an upper support plate that supports the drive unit 50 in a vertically arranged state. The 14b and the lower support plate 14c are provided on the upper side and the lower side. Further, a plurality of guide portions 14d are installed in the vertical direction between the upper support plate 14b and the lower support plate 14c, and the end portion of the base portion 61 in the moving means 60 composed of a plurality of movable tables and the like. A guide portion 14d is installed in the guide portion 14d. Further, a lower end portion of the drive portion 50 is connected to a substantially central portion of the base portion 61. As a result, the moving means 60 can move up and down via the base portion 61 connected to the drive portion 50.

As shown in FIG. 5, the moving means 60 mainly has a direction different from that of the first movable table 62, which is movably fixed to the base portion 61 connected to the drive portion 50, and the first movable table 62. It is composed of a second movable table 63 that is movably fixed to. Specifically, the base portion 61 and the first movable table 62 are provided with front-rear direction moving means for moving the tightening tool 20 in the front-rear direction (Y direction) with respect to the base portion 61. Further, the first movable table 62 and the second movable table 63 are provided with left-right direction moving means for moving the tightening tool 20 in the left-right direction (X direction) with respect to the base portion 61. As a result, the tightening tool 20 can be moved in the front-back and left-right directions with respect to the base portion 61.

More specifically, as shown in FIGS. 2 and 5, the base portion 61 extends in the front-rear direction and is formed in a substantially rectangular shape, and both front and rear ends are slidably connected to the guide portion 14d. , A substantially central portion is connected to the drive unit 50. Further, as shown in FIGS. 2 to 5, a first movable table 62 is installed at both lower left and right ends of the base portion 61 via a front-rear direction moving means. The front-rear direction moving means is composed of, for example, a first rail 64 provided along the front-back direction (Y direction) of the base portion 61 and a first block 65 slidable on the first rail 64. The first movable table 62 is not limited to this as long as it can move linearly in the front-rear direction (Y direction) with respect to the base portion 61.

As shown in FIGS. 2 and 5, the first movable table 62 is formed in a substantially L shape so as to secure a space for arranging the tightening tool 20. Specifically, the first movable table 62 is orthogonal to the base end portion 66 connected to the first block 65 of the front-rear direction moving means from one end of the base end portion 66 below the base portion 61. It is composed of an extension portion 67 to be extended.

Further, as shown in FIGS. 4 and 5, a second movable table 63 is installed below the extended portion 67 of the first movable table 62 via a left-right direction moving means. The left-right direction moving means is composed of, for example, a second rail 68 provided along the left-right direction (X direction) of the extension portion 67, and a second block 69 slidable on the second rail 68. However, the present invention is not limited to this as long as the second movable table 63 can move directly in the left-right direction (X direction) with respect to the first movable table 62.

As shown in FIGS. 2 and 5, the second movable table 63 is formed in a substantially square shape with a space for disposing the tightening tool 20 at a substantially central portion. Specifically, the second movable table 63 has one end connected to the second block 69 of the left-right moving means and the other end extended below the extending portion 67 in the first movable table 62. It is connected to a table support portion 70, which will be described later, which is provided so as to project in the same direction as the installation portion 67.

As shown in the figure, the moving means 60 configured in this way is installed so as to be symmetrical with respect to the base portion 61. Further, a second movable table located between the extending portion 67 of the first movable table 62 arranged on the front side and the table support portion 70 installed below the first movable table 62 on the rear side. Since the tightening tool 20 can be arranged on the 63, space can be saved.

Further, these moving means 60 return the axis of the tightening tool 20 after the movement to the origin position before the movement when the tightening tool 20 is moved by the front-back direction moving means and the left-right direction moving means. It is equipped with a return means.

The origin return means are the front-rear origin return means 71 that returns the axial center of the tightening tool 20 after movement to the position before movement when the tightening tool 20 moves in the front-rear direction (Y direction), and the home-return means 71. When the attached tool 20 moves in the left-right direction (X direction), it is composed of a left-right direction origin return means 72 that returns the axial center of the tightening tool 20 after the movement to the position before the movement.

The origin return means 71 in the front-rear direction accumulates urging force corresponding to the movement of the first movable table 62 with respect to the base portion 61, and the urging force after the movement of the first movable table 62. Acts on the movement of the first movable table 62 to return it to the position before the movement.

Specifically, as shown in FIGS. 2, 3, 5, and 8, the base portion 61 and the first movable table 62 are connected by a connecting portion 73 slidable with respect to the base portion 61. A connecting shaft 76 for inserting the connecting portion 73 is provided between the front end portion 74 and the rear end portion 75 provided in the front-rear direction (Y direction) of the connecting portion 73. Further, between the front end portion 74, the rear end portion 75, and the connecting portion 73, elastic members such as springs that serve as urging means 77 for returning to the front and rear are provided along the connecting shaft 76, respectively, and the connecting portion. The spring is pressed and contracted in response to the movement of the 73, so that the urging force can be accumulated. As a result, after the movement of the first movable table 62 in the front-rear direction, the urging force acts to expand the spring and press the connecting portion 73, so that the first movable table 62 cooperates with the connecting portion 73. It is possible to return to the position before the movement.

The left-right origin return means 72 accumulates urging force corresponding to the movement of the second movable table 63 with respect to the first movable table 62, and after the movement of the second movable table 63, the force is accumulated. The urging force acts to return the second movable table 63 to the position before the movement.

Specifically, as shown in the figure, the front or rear side surface portion of the second movable table 63 on the side to which the table support portion 70 is connected is to hold the side surface portion from the upper and lower side surfaces. The pitch adjusting portion 78 is slidably installed. Further, the pitch adjusting portion 78 is provided with a grip portion 79 so as to be able to advance and retreat in the outward direction, and the grip portion 79 is engaged with the recess 80 formed in the side surface portion of the second movable table 63. The pitch adjusting portion 78 is fixed to the second movable table 63.

Further, the base end portion 66 of the first movable table 62 is provided with an arm portion 81 formed by bending toward the upper end surface side of the pitch adjusting portion 78. Then, the arm portion 81 and the pitch adjusting portion 78 are connected by an elastic member such as a spring serving as a urging means 82 for returning to the left and right, and the pitch adjusting portion 78 is fixed in response to the movement of the second movable table 63. The structure is such that the urging force can be accumulated by the extension of the spring. As a result, after the second movable table 63 moves in the left-right direction, the urging force acts to cause the spring to contract, so that the second movable table 63 cooperates with the pitch adjusting unit 78 to move to the position before the movement. And can be restored.

Further, as shown in FIG. 5, the pitch adjusting portion 78 is installed in the notch portion 83 provided in the table support portion 70. The cutout portion 83 is provided to abut on both ends of the notch portion 83 by moving the pitch adjusting portion 78 with the movement of the second movable table 63, thereby restricting the movement of the second movable table 63. Be done. Further, a plurality of recesses 80 are formed on the side surface portion of the second movable table 63, and the installation position of the pitch adjusting portion 78 can be changed by changing the engagement position of the grip portion 79 with respect to the recess 80. It is configured so that it can be done. Thereby, the position of the second movable table 63 with respect to the base portion 61 can be adjusted in advance in the left-right direction (X direction).

In this embodiment, as shown in the figure, the front-rear origin return means 71 and the left-right origin return means 72 are installed on one of the tightening tools 20 in the unit portion 14. Of course, it is not limited to the above, and can be installed for each tightening tool 20. Further, only one of the front-rear origin return means 71 and the left-right origin return means 72 can be installed on the tightening tool 20.

In this way, the moving means 60 of the unit portion 14 and the origin return means are configured, and as shown in FIGS. 3 and 4, the engaging portion (not shown) of the tightening tool 20 is arranged on the lower side. In this state, the tightening tool 20 is inserted into a through hole (not shown) of the second movable table 63 and installed, and the socket 30 is connected to the engaging portion.

The tightening member tightening machine configured in this way is a work information input device (not shown) for inputting information on tightening work or loosening work of the tightened member B at a predetermined position for fixing the rail R (not shown). Is provided for the control unit 16. The control unit 16 is configured to output drive control information to the tightening tool 20 and the drive unit 50, respectively, and to input work information from an operation panel (not shown) or the like.

Next, the tightening work of the tightened member B performed by using the tightening member tightening machine will be described with reference to FIGS. 2, 6 to 8. First, a worker drives the transport vehicle 10 on the rail R to a predetermined position of the tightened member B.

Then, in the vertical direction (Z direction) of the transport vehicle 10, the axial center of the tightened member B and the axial center of the tightening tool 20 are brought into a state of substantially matching, and drive control information is output from the control unit 16. Then, the socket 30 rotates together with the tightening tool 20, and both start to descend by the drive unit 50. At this time, the control unit 16 can lower the plurality of tightening tools 20 at the same time, or can lower only the reference tightening tool 20.

Then, since the socket 30 descends while rotating, when the bottom surface 38 of the socket tip portion 32 comes into contact with the tightened member head B1, as shown in FIG. 6, the rotation causes the inside of the guide portion 39. The head B1 of the member to be tightened is in a guided state. Then, in this state, since the tightening tool 20 is further lowered by the drive unit 50, the head B1 of the member to be tightened is pressed downward by the guide portion 39 of the socket tip portion 32, and the tightening tool 20 is further lowered. By descending, the urging force of the urging means 33 is accumulated. At this time, of course, in the socket 30, the socket 30 can be rotated after the socket tip portion 32 is brought into contact with the head to be tightened member B1.

Further, in the socket tip portion 32, the front-rear direction moving means and the left-right moving means connected to the tightening tool 20 act, and the rotation causes the tightened member head B1 to be on the inner surface of the guiding portion 39. The socket tip portion 32 moves in conjunction with the sliding contact. Then, when the socket tip portion 32 moves to a predetermined position, the axial center of the tightened member B and the axial center of the tightening tool 20 are in a state of being close to each other in the vertical direction (Z direction). Later, when the socket tip portion 32 moves until the tightening member head B1 is located in the region of the tapered portion 41 formed at the boundary between the guiding portion 39 and the fitting portion 40, the tightening member is moved to the tapered portion 41. A state in which the head B1 is guided so that the outer shape of the tightened member head B1 and the fitting portion 40 match, and the axis of the tightened member B and the axis of the tightening tool 20 match. Will be.

In such a state, although the tightening tool 20 is further lowered by the drive unit 50, when the head B1 of the member to be tightened and the fitting portion 40 are fitted, the guiding portion of the socket tip portion 32 is temporarily lowered. The contact state between 39 and the head B1 of the member to be tightened is released. As a result, the accumulated urging force acts to move the socket tip portion 32 downward, and as shown in FIG. 7, the head B1 of the member to be tightened and the upper end of the fitting portion 40 come into contact with each other to fit. The fitted state with the joint portion 40 is maintained.

Then, in the fitted state, the tightening tool 20 is further lowered while rotating by the drive unit 50, so that the tightening member B is tightened. Then, when the tightening tool 20 detects a predetermined torque or a predetermined descent time of the tightening tool 20 by the drive unit 50 is detected, the tightening work of the tightened member B is completed.

After the tightening work is completed, the tightening tool 20 is moved upward by the drive unit 50, and the origin return means 71 in the front-rear direction and the origin return in the left-right direction are returned according to the amount of movement of the front-rear moving means and the left-right moving means. The means 72 acts to return the axis of the tightening tool 20 to the origin position before the movement.

On the other hand, the loosening work of the tightened member B is substantially the same as the tightening work of the tightened member B, except that the rotation direction of the tightening tool 20 and the movement of the tightening tool 20 by the drive unit 50 are different. Therefore, the description thereof will be omitted.

According to the tightening member tightening machine according to the present invention described above, the socket 30 having the guide portion 39 and the fitting portion 40 and the moving means 60 that makes the axis of the tightening tool 20 movable are provided. Therefore, even if the axis of the tightened member B and the axis of the tightening tool 20 do not match due to the arrangement interval of the tightened member B or the like, the socket 30 rotates with the tightened member. It can be moved to the B position to align the axes of both, and the tightening work or the loosening work can be easily performed. As a result, the burden on the worker can be reduced, and as a result, the number of workers can be reduced and the capital investment can be reduced.

The tightening member tightening machine according to the second embodiment has the same basic configuration as that of the first embodiment, but the configuration of the socket tip portion 32 is different. Specifically, as shown in FIG. 9, the guide portion 39 is formed through a step so as to be concave with respect to the bottom surface 38 of the base portion 36, and is a fitting portion at the edge of the bottom surface 38 of the socket tip portion 32. It has a recessed portion 42 recessed in the bottom surface 38 so that the tightened member head B1 can be fitted from the axial center side of the 40 to the outside in the radial direction. The recessed portion 42 is recessed larger than the maximum outer shape of the tightened member head B1 so as to fit into the tightened member head B1 when the tightening tool 20 is rotated.

When the socket 30 provided with the recessed portion 42 descends while rotating, the bottom surface 38 of the socket tip portion 32 abuts on the head B1 of the member to be tightened, and as shown in FIG. 9, the recessed portion 42 due to the rotation. Is fitted into. When the axial center of the tightened member head B1 fitted in the recessed portion 42 is inside the recessed portion 42, the tightened member head B1 is attracted to the fitting portion 40 by the rotational force. Be done. On the other hand, when the axial center of the tightened member head B1 fitted in the recessed portion 42 is outside the recessed portion 42, the tightened member head B1 is ejected from the recessed portion 42 by a rotational force. Is done.

That is, by providing the above-mentioned recessed portion 42 on the edge of the guide portion 39, it is not always necessary to accommodate the tightened member head B1 in the guide portion 39, and the axial center of the tightened member head B1 is concave. If it is inside the edge of the setting portion 42, the socket 30 moves to the position of the head B1 of the member to be tightened with rotation, and the tightening work or the loosening work can be easily performed.

In the first and second embodiments, the structures of the transport vehicle 10, the socket 30, the moving means 60 and the like can be appropriately changed. For example, in the transport vehicle 10, the worker travels on the rail R to the position of the predetermined tightening member B, but the wheel drive device for driving the wheel portion 12 to the transport vehicle 10 is tightened. It is also possible to install a detection device or the like for detecting the position of the attachment member B so that the transport vehicle 10 is self-propelled to the position of the tightened member B.

Further, the socket 30 is provided with an urging means 33 capable of accumulating an urging force between the socket connecting portion 31 and the socket tip portion 32, but the lowering state of the tightening tool 20 is controlled by the control unit 16. By controlling it, it is possible to configure the configuration without the urging means 33. Specifically, the tightening tool 20 is lowered until the socket 30 comes into contact with the head B1 of the member to be tightened, and after the socket 30 is brought into contact with the head B1, the tightening tool 20 is controlled to stop the lowering, and from the guide portion 39 to the fitting portion 40. It moves and controls the tightening tool 20 to be lowered again in a state where the head B1 of the member to be tightened is substantially fitted. In this way, the tightening tool 20 can be lowered stepwise to perform the tightening work or the loosening work of the tightened member B.

Further, the guide portion 39 is formed in a circular shape, but the present invention is not limited to this. For example, the guide portion 39 may have an elliptical shape, or may have another shape such as a polygonal shape or a shape in which a plurality of these are appropriately combined. For example, the guide portion 39 can be formed from two arcs or the like whose fitting portion extends in the outer diameter direction centered on 40 in the bottom view of the socket tip portion 32, and is not limited to this. By providing the plurality of guide portions 39 with respect to the fitting portion 40 in this way, it is possible to shorten the working time until the head B1 of the member to be tightened fits into the fitting portion 40. The guide portion 39 may have a shape that can guide the head B1 of the tightened member to be slidably contacted with the inner side surface to the fitting portion 40 according to the rotation of the tightening tool 20.

Further, in the moving means 60, the tightening tool 20 is not limited to moving in the front-rear direction (Y direction) and the left-right direction (X direction) with respect to the base portion 61, and the tightening tool 20 is used in all directions including an oblique direction. Of course, it is possible to install a joint or the like on the base portion 61 so that the axis can be moved. At that time, the tightening tool 20 was installed on the second movable table 63, but the tightening tool 20 is not limited to this, and of course, it can be installed on the first movable table 62.

Further, although the tightening member tightening machine is to be driven on the rail R by using the transport vehicle 10, it may be configured not to include the transport vehicle 10. Specifically, it suffices to include at least a tightening tool 20 having a socket 30, a drive unit 50, and a moving means 60. As a result, in an automobile factory or the like, it is possible to perform tightening work or loosening work on the tightened member B such as a tire transported on the line. Of course, in such a case, the movable direction of the tightening tool 20 can be moved up and down or left and right.

Further, it is of course possible to omit a partial configuration and to obtain a partially extracted configuration.

10 Transport vehicle 12 Wheel part 14 Unit part 20 Tightening tool 30 Socket 32 Socket tip part 33 Biasing means 39 Induction part 40 Fitting part 41 Tapered part 42 Concave part 50 Drive part 60 Moving means 62 First movable table 63 2 Movable table B Tightened member B1 Tightened member Head R Rail

Claims (9)

Tightening tools that apply rotational force when tightening or loosening bolts, nuts, and other tightened members used to fix rails on railway tracks.
The bottom surface facing the head of the tightened member when the tightening tool is rotated, the concave guide portion that is in sliding contact with the head of the tightened member, and the concave guide portion that is eccentrically connected in the region of the guide portion, are connected in a row. A socket that has a fitting portion that can be fitted to the outer shape of the head of the member to be tightened and is connected to the tightening tool.
A drive unit that makes the tightening tool movable,
A moving means that makes it possible to move the axis of the tightening tool when the tightening tool that guides the head of the member to be tightened from the guiding portion to the fitting portion is rotated.
A tightening member tightening machine characterized by being provided with. The tightening member tightening machine according to claim 1, wherein the guiding portion has a recessed portion recessed in the bottom surface from the axial center side of the fitting portion to the outside in the radial direction. The tightening member tightening machine according to claim 1 or 2, wherein the fitting portion is formed close to an inner position of a rotation locus formed by an inner surface surface of the guide portion during rotation. The socket is connected to the socket tip portion by pressing the head of the tightened member downward at the socket tip portion of the socket in which the guide portion and the fitting portion are formed during the rotation. The tightening member tightening machine according to any one of claims 1 to 3, further comprising an urging means for accumulating the urging force by moving the socket connecting portion downward. The tightened member according to any one of claims 1 to 4, wherein a tapered portion for guiding the head of the tightened member is formed at the boundary between the guide portion and the fitting portion. A kanhe machine. The tightening member according to any one of claims 1 to 5, wherein the moving means includes an origin returning means for returning the axis of the tightening tool after movement to the origin position before moving. Dissolution machine. A 1 to 6 claim, wherein a unit portion for accommodating at least the tightening tool, the drive portion, and the moving means to which the socket is connected is installed in a transport vehicle having a wheel portion capable of traveling on a rail. The tightening member tightening machine according to any one of the items. The moving means includes a first movable table movably fixed to a base portion connected to the drive portion, and a second movable table movably fixed in a direction different from that of the first movable table. The tightening member tightening machine according to any one of claims 1 to 7. A tightening tool that applies a rotational force when tightening or loosening bolts, nuts, and other tightened members used to fix rails on railway tracks, and a movement that makes the axis of the tightening tool movable. A socket for a tightening member tightening machine configured to include at least means.
The socket connecting portion connected to the tightening tool and
The concave guide portion that is in sliding contact with the head of the tightening member when the tightening tool is rotated, and the tightened member that is formed at a position close to or in contact with the inner surface of the guide portion in the region of the guide portion. A socket tip portion that has a fitting portion that can be fitted to the outer shape of the head and is connected to the socket connecting portion via an urging means.
A socket for a tightening member tightening machine, which is characterized by being provided with.

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