JP2022045536A - Socket for un-tightening member to be tightened, and un-tightening machine for member to be tightened - Google Patents

Abstract

To provide a socket for un-tightening a member to be tightened and an un-tightening machine for a member to be tightened capable of tightening the member to be tightened with high working efficiency even under a working environment in which other members that could hinder tightening work are installed in the vicinity of the member to be tightened.SOLUTION: A socket for un-tightening 30 is used for an un-tightening machine for a member to be tightened including a tightening tool and support means. The support means supports the tightening tool so that a rotation axis of the tightening tool is movable. The socket for un-tightening includes a shaft-like socket body, a movable body, a recessed guide part, and first energizing means. The movable body is supported by the socket body movably between an initial position at the start of tightening and a retracted position. The guide part is formed on the lower surface of the flange part of the movable body eccentrically with respect to the rotation axis, is in sliding contact with a fitted part B1, and guides the tightening tool to a fitting position where the fitting part is fitted to the fitted part B1. The first energizing means energizes the movable body downward.SELECTED DRAWING: Figure 1

Description

INDUSTRIAL APPLICABILITY The present invention relates to a tightening socket for a tightening member and a tightening machine for a tightening member, particularly a tightening operation for fixing a tightening member such as a bolt or a nut for fixing a railway rail on a railway track. The present invention relates to a tightening socket for the tightened member used for loosening work for loosening the tightened member, and a tightening machine for the tightened member.

Patent Document 1 describes a shaft as a tightening socket for a tightened member used for tightening work such as bolts and nuts and loosening work for fixing a railroad rail to a track structure such as a sleeper or a track slab. A tightening socket for a tightened member provided with a shaped socket body is described. The socket is attached to and rotated by a tightening tool that has a drive source such as a motor.

The tightening machine of the tightened member has a bogie that moves along the rail. The tightening tool is supported by the trolley so as to be movable in a predetermined range in the horizontal direction. Further, the tightening tool is driven up and down by the drive mechanism when performing the tightening work and the loosening work.

The socket has a connecting portion connected to the tightening tool at the upper end and a fitting portion at the lower end that fits with the head of the bolt as the tightened member. A flange portion is formed around the fitting portion, and a concave guide portion is formed on the lower surface of the flange portion.

The bolts for fixing the railroad rail are temporarily tightened at each tightening position on the track structure, and the tightening machine moves along the rail and tightens while rotating the socket at each tightening position. Lower the attached tool and tighten the bolts at each tightening position.

However, the position of the bolt temporarily tightened at each tightening position has a deviation of about ± 10 mm with respect to the reference position in the direction orthogonal to the rail. Therefore, when the tightening tool is lowered while rotating the socket, the axis of the fitting portion in the socket and the axis of the bolt may not match.

According to the tightening socket of the tightened member described in Patent Document 1, when the axis of the fitting portion and the axis of the bolt do not match, the guide portion on the lower surface of the flange portion is in sliding contact with the head of the bolt. The tightening tool moves horizontally so that the axis of the fitting portion and the axis of the bolt match, and the fitting portion and the head of the bolt are fitted. Therefore, even if the actual position of the bolt deviates from the reference position, the fitting portion and the head of the bolt can be automatically fitted, and the member to be tightened can be tightened with high work efficiency.

Japanese Unexamined Patent Publication No. 2018-9443

However, in recent years, it has been planned to install a fall prevention device on a railroad track to prevent the rail from falling, especially on the Shinkansen. The anti-tip device includes a pair of rail supports. The pair of rail supports are fixed to the track structure so as to sandwich the rail by bolts for fixing the rail to the track structure such as sleepers. A recess is provided on the upper surface of each rail support, and the bolt insertion hole is opened at the bottom of the recess.

The bolt insertion hole opens at the bottom of the recess so that when the bolt is tightened, the head of the bolt gets into the recess. Therefore, when the bolt is to be tightened by using the tightening socket of the tightened member described in Patent Document 1, the flange portion comes into contact with the upper surface of the rail support during the tightening, and the bolt is tightened. It is possible that you will not be able to complete.

The present invention has been made in view of the above problems, and an object thereof is to be covered with high work efficiency even in a work environment in which another member that hinders the tightening work is installed in the vicinity of the member to be tightened. It is an object of the present invention to provide a tightening socket for a tightened member capable of tightening a tightening member, and a tightening machine for the tightened member.

The tightening socket of the tightened member disclosed in the present application is used for a tightening machine provided with a tightening tool (20) and a support means (60). The tightening tool (20) applies a rotational force at least when tightening the tightened member (B). The support means (60) supports the tightening tool (20) so that the rotation axis of the tightening tool (20) can be moved. The tightening socket of the tightened member includes a shaft-shaped socket body (31), a connecting portion (32), a fitting portion (33), a movable body (34), and a concave guiding portion (). 35) and the first urging means (36). The socket body (31) is a member extending along the rotation axis of the tightening tool (20). The connecting portion (32) is formed at one end in the axial direction of the socket body (31) and is connected to the tightening tool (20). The fitting portion (33) is formed at the other end of the socket body (31) in the axial direction, and fits with the fitted portion (B1) of the tightened member (B). The movable body (34) has a tubular portion (34a) and a flange portion (34b), and has an initial position (P1) and a retracted position (P2) at the start of tightening along the axial direction. It is supported by the socket body (31) so as to be movable between them. The socket body (31) can be inserted into the tubular portion (34a). The flange portion (34b) is formed at one end of the tubular portion (34a) and faces the fitted portion (B1) of the tightened member (B). The retracted position (P2) is a position retracted from the initial position (P1) in the tightening direction (X1) with respect to the socket body (31) by a predetermined length. The tightening direction (X1) is a direction in which the fitted portion (B1) of the tightened member (B) moves when the tightened member (B) is tightened. The guide portion (35) is formed eccentrically with respect to the rotation axis on the surface of the flange portion (34b) facing the fitted portion (B1), and is described in a plan view from the rotation axis direction. The fitting portion (33) is included, and the fitting portion (33) is slidably contacted with the fitted portion (B1), and the tightening is performed at a fitting position where the fitting portion (33) is fitted with the fitted portion (B1). Guide the attached tool (20). The first urging means (36) urges the movable body (34) toward the initial position (P1).

In the tightening socket of the tightened member disclosed in the present application, the socket body (31) has a first shaft body (31a) and a second shaft body (31b). The first shaft body (31a) has the connecting portion (32) formed at one end thereof. The second shaft body (31b) is supported by the first shaft body (31a) so that the fitting portion (33) is formed at one end and can move within a predetermined range along the axial direction. The tightening socket of the tightened member disclosed in the present application further includes a second urging means (37). The second urging means (37) urges the second shaft body (31b) with respect to the first shaft body (31a) in the tightening direction.

The tightening machine for the tightened member disclosed in the present application includes the above-mentioned tightening socket for the tightened member, a trolley (10), a tightening tool (20), a drive means (50), and a support means. (60) and. The carriage (10) moves to a tightening position for tightening the tightened member (B). The "tightening position" is a position where the tightening work of the tightened member (B) is performed, and the axis of the temporarily tightened tightened member (B) and the rotation of the tightening tool (20). It is a position where the axis matches within an error range of, for example, about ± 10 mm. The tightening tool (20) applies a rotational force to the tightening socket at least when tightening the tightened member (B). The drive means (50) is attached to the carriage (10) and drives the tightening tool (20) along the rotation axis. The support means (60) supports the tightening tool (20) on the trolley (10) so that the rotation axis of the tightening tool (20) can be moved.

In the tightening machine of the tightened member disclosed in the present application, the bogie (10) has a wheel portion (12) for moving along a railroad rail (R).

According to the tightening socket of the tightened member and the tightening machine of the tightened member of the present invention, in a working environment where other members that hinder the tightening work are installed in the vicinity of the tightened member. However, the member to be tightened can be tightened with high work efficiency.

It is a front view which shows the tightening machine of the tightening member which concerns on embodiment of this invention. It is a top view which shows the support means. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 2 is a cross-sectional view taken along the line BB of FIG. It is a perspective view which shows the support means. It is a partial cross-sectional view which shows the socket for tightening of the tightening member which concerns on embodiment of this invention, and is the partial cross-sectional view which the guide part is in contact with the fitted part of a tightening member. It is a bottom view of the socket for tightening of FIG. It is a partial cross-sectional view which shows the socket for tightening of the tightening member which concerns on embodiment of this invention, and is the partial cross-sectional view which the fitting part and the tightening member are fitted. It is a bottom view of the socket for tightening of FIG. It is a partial cross-sectional view which shows the socket for tightening of the tightening member which concerns on embodiment of this invention, and is the partial cross-sectional view at the time of completion of a tightening work.

Hereinafter, the tightening socket for the tightened member and the tightening machine for the tightened member according to the embodiment of the present invention will be described in detail with reference to the drawings. Since the embodiments described below are preferable specific examples for carrying out the present invention, various technical restrictions are made, but the present invention particularly limits the invention in the following description. Is not limited to this embodiment unless otherwise specified.

As shown in FIGS. 1 and 2, the tightening machine for the tightened member according to the embodiment of the present invention is covered with bolts, nuts, etc. for fixing the railroad rail R to the track structure 1 such as sleepers or track slabs. It is intended to perform tightening work and loosening work of the tightening member B, and includes a carriage 10, a tightening tool 20, a socket 30, a driving means 50, and a supporting means 60.

The bogie 10 has a wheel portion 12 and can move along the railroad rail R to a tightening position for tightening the tightened member B. The tightening position is a position where the tightening work of the tightened member B is performed, and the axis of the temporarily tightened member B and the rotation axis of the tightening tool 20 are, for example, ± 10 mm. It is a position that matches within the range of error of the degree. Further, the carriage 10 has a misalignment prevention mechanism 13. The misalignment prevention mechanism 13 prevents the wheel portion 12 from laterally shifting with respect to the railroad rail R.

The tightening tool 20 has a drive source such as an electric motor (not shown), and applies a rotational force to the socket 30 at least when tightening the tightened member B. The tightening tool 20 is, for example, an impact type tightening tool or a nut runner. In the embodiment, the tightening tool 20 also applies a rotational force to the socket 30 when the tightening member B is loosened. However, in the following embodiments, the present invention will be described with a focus on the tightening work of the member B to be fastened from the viewpoint of facilitating the understanding of the present invention.

As shown in FIGS. 3 to 5, the drive means 50 is attached to a unit portion 14 described later mounted on the carriage 10, and drives the tightening tool 20 along the rotation axis of the tightening tool 20. In the embodiment, the rotation axis of the tightening tool 20 extends up and down, and the driving means 50 drives the tightening tool 20 up and down. Specifically, the drive means 50 drives the tightening tool 20 downward when the tightening work of the tightened member B is performed, and when the tightening work is completed, the drive means 50 does not hinder the movement of the carriage 10. Drive the tightening tool 20 upward to the position.

The support means 60 supports the tightening tool 20 on the carriage 10 so that the rotation axis of the tightening tool 20 can be moved. In the embodiment, the support means 60 supports the tightening tool 20 on the carriage 10 so as to be able to translate the tightening tool 20 in a predetermined range in the horizontal direction. Further, in the embodiment, the tightening tool 20 is driven up and down by driving the support means 60 up and down by the drive means 50.

As shown in FIGS. 3 and 4, a fall prevention device for preventing the rail R from falling may be installed on the railroad track. The fall prevention device includes a pair of fall prevention devices 2 and 3 installed so as to sandwich the railroad rail R in between. The pair of fall prevention tools 2 and 3 are fixed to the track structure 1 together with the railroad rail R by the tightened member B.

As shown in FIG. 3, the pair of fall prevention tools 2 and 3 have recesses 2a and 3a on the upper surface thereof. An insertion hole through which the tightened member B is inserted is opened at the bottom of the recesses 2a and 3a. When the tightening work is completed, the fitted portion B1 of the tightened member B is fitted into the recesses 2a and 3a. The fitted portion B1 is, for example, the head of a bolt.

Next, the tightening socket of the tightened member according to the embodiment of the present invention will be described with reference to FIGS. 6 to 10. Further details of the carriage 10, the driving means 50, and the supporting means 60 will be described later with reference to FIGS. 1 to 5.

As shown in FIG. 6, the socket 30 includes a socket main body 31, a connecting portion 32, a fitting portion 33, a movable body 34, an guiding portion 35, and a first spring 36 as a first urging means. A second spring 37 as a second urging means is provided.

The socket body 31 is a shaft-shaped member extending along the rotation axis of the tightening tool 20. The connecting portion 32 is provided at the upper end of the socket main body 31, is connected to the tightening tool 20, and transmits the rotational force applied from the tightening tool 20 to the socket main body 31. Specifically, the connecting portion 32 includes a recess or the like that fits with the output shaft of the tightening tool 20. The fitting portion 33 is provided at the lower end of the socket main body 31 so that the tightened member B can be tightened and is fitted with the fitted portion B1 of the tightened member B.

Further, as shown in FIG. 6, the socket main body 31 has a first shaft body 31a and a second shaft body 31b. The second shaft body 31b is supported by the first shaft body 31a so as to be movable within a predetermined range along the rotation axis of the tightening tool 20.

In the first shaft body 31a, the connecting portion 32 is formed at the upper end, and the retaining portion 31d is formed at the lower end. Further, the first shaft body 31a has a step 39 on the outer peripheral surface, the upper side of the step 39 is formed in the large diameter portion, and the lower side of the step 39 is formed in the small diameter portion. Further, a cylindrical skirt portion 40 is projected downward from the step 39, and an annular gap is formed inside the skirt portion 40 with a small diameter portion, and a second gap is formed in the gap. The upper end 38 of the shaft body 31b can enter.

As shown in FIG. 6, the second shaft body 31b has a hollow cylindrical shape, and a fitting portion 33 is formed at the lower end. A small diameter portion of the first shaft body 31a is inserted into the hollow portion of the second shaft body 31b through the opening of the upper end 38. A guide groove 31e is formed on the outer peripheral surface of the small diameter portion of the first shaft body 31a, and the second shaft body 31b can be moved within a predetermined range and cannot be relatively rotated by the guide groove 31e. It is supported by the body 31a.

Further, at the lower end of the second shaft body 31b, as shown in FIGS. 6 and 7, a circular tapered portion 31c in a plan view is formed around the fitting portion 33 at the coaxial center with the fitting portion 33. There is. By forming the tapered portion 31c around the fitting portion 33, the fitted portion B1 and the fitting portion 33 are smoothly fitted.

The movable body 34 has a hollow tubular portion 34a and a flange portion 34b, and as shown in FIGS. 6 and 10, the movable body 34 can be moved between the initial position P1 and the retracted position P2 at the start of tightening. It is supported by the second shaft body 31b of the socket body 31. The retracted position P2 is a position retracted from the initial position P1 by a predetermined length in the tightening direction X1 with respect to the second shaft body 31b. The tightening direction X1 is a direction in which the fitted portion B1 of the tightened member B moves when the tightened member B is tightened. In FIGS. 6 and 10, the initial position P1 and the retracted position P2 are shown depending on the position of the upper end 34c of the movable body 34. The "predetermined length" is determined based on the depth of the recesses 2a and 3a provided on the upper surfaces of the pair of fall prevention tools 2 and 3, and is 2 to 3 centimeters in the embodiment. The "predetermined length" can be appropriately set according to the depths of the recesses 2a and 3a.

Further, the tubular portion 34a has a pair of elongated holes 34d as shown in FIGS. 4 and 6. The pair of elongated holes 34d extend along the axial direction of the socket body 31. The pair of elongated holes 34d engage with both ends of the pin 34e to prevent the movable body 34 from rotating with respect to the second shaft body 31b, and at the maximum, the movable body 34 moves with respect to the second shaft body 31b. It defines the range of movement of.

The pins 34e are inserted into a pair of pin holes provided in the peripheral wall of the hollow portion of the second shaft body 31b, and are installed so as to be orthogonal to the central axis of the second shaft body 31b. Both ends of the pin 34e project outward by a predetermined length from the outer peripheral surface of the second shaft body 31b and engage with the pair of elongated holes 34d. When the movable body 34 is located at the initial position P1, both ends of the pin 34e are close to the upper ends of each of the pair of elongated holes 34d, and when the movable body 34 is located at the retracted position P2, both ends of the pin 34e are located. It is close to each lower end of the pair of elongated holes 34d.

As shown in FIG. 6, the flange portion 34b is formed at the lower end of the tubular portion 34a and faces the fitted portion B1 of the tightened member B.

As shown in FIGS. 6 and 7, the guide portion 35 is eccentrically formed with respect to the rotation axis S1 on the surface of the flange portion 34b facing the fitted portion B1, and is slidably contacted with and fitted with the fitted portion B1. The tightening tool 20 is guided to the fitting position where the fitting portion 33 fits with the fitted portion B1. The surface of the flange portion 34b facing the fitted portion B1 is the lower surface of the flange portion 34b in the embodiment. The “fitting position” is the position of the tightening tool 20 when the fitting portion 33 is fitted with the fitted portion B1. For example, the rotation axis S1 of the tightening tool 20 is the tightened member B. This is the position of the tightening tool 20 when it coincides with the axis S2 of.

As shown in FIG. 7, the guide portion 35 has a circular shape having a larger diameter than the fitting portion 33, and the fitting portion 33 has a circular shape having a diameter larger than that of the fitting portion 33, and is viewed in a plan view from the direction of the axis of rotation, or in a plan view from below in the embodiment. Is included. As will be described later, when the rotation axis S1 of the tightening tool 20 does not match the axis S2 of the tightened member B, the guide portion 35 is in sliding contact with the fitted portion B1 to cause the tightening tool. 20 is guided to the fitting position. Therefore, it is preferable that the guide portion 35 is eccentrically formed on the lower surface of the flange portion 34b with a diameter as large as possible.

As shown in FIGS. 6 and 7, the bottom portion of the guide portion 35 is a flat surface parallel to the lower surface of the flange portion 34b, and the guide portion 35 is aligned with the lower surface of the flange portion 34b along the outer peripheral circumference. Has a vertical step between the two. Further, at the bottom of the guide portion 35, a circular opening 35a is formed coaxially with the rotation axis S1. The circular opening 35a has an inner diameter substantially equal to the outer diameter of the lower end of the second shaft body 31b, and the lower end of the second shaft body 31b can pass through. As shown in FIG. 6, the lower end of the second shaft body 31b is substantially flush with the bottom of the guiding portion 35 when the movable body 34 is located at the initial position P1. Further, the guide portion 35 is eccentrically formed with respect to the rotation axis S1 so that the outer peripheral circumference is circumscribed or close to the circular opening 35a.

In the embodiment, the first spring 36 as the first urging means urges the movable body 34 toward the initial position P1 with respect to the second shaft body 31b. In the compressed state, the upper end of the first spring 36 is in contact with the spring stopper 34f, and the lower end is in contact with the step formed on the outer peripheral surface of the tubular portion 34a.

The second spring 37 as the second urging means urges the second shaft body 31b in the tightening direction X1 with respect to the first shaft body 31a by a urging force larger than that of the first spring 36. In the embodiment, in the compressed state, the upper end of the second spring 37 abuts on the step 39 of the first shaft body 31a, and the lower end hits the step formed on the outer peripheral surface of the second shaft body 31b. I'm in contact.

Next, with reference to FIGS. 6 to 10, the operation of the socket 30 when the tightened member B is tightened by the tightening tool 20 will be described.

As shown in FIGS. 6 and 7, when the socket 30 rotates while the fitted portion B1 is in contact with the guide portion 35, the fitted portion B1 comes into contact with a step on the outer peripheral circumference of the guide portion 35. .. When the socket 30 further rotates while the fitted portion B1 is in contact with the step of the guide portion 35, a force is applied from the fitted portion B1 to the flange portion 34b, and the tightening tool 20 is translated by the support means 60. Then, as shown in FIGS. 8 and 9, the fitting portion 33 and the fitted portion B1 are fitted.

When the fitting portion 33 and the fitted portion B1 are fitted, the tightening of the tightened member B is started. The flange portion 34b comes into contact with the upper surfaces of the fall prevention devices 2 and 3 in the middle of the process from the start of tightening of the member B to be tightened to the completion of tightening. When the flange portion 34b comes into contact with the upper surfaces of the fall prevention devices 2 and 3, as shown in FIG. 10, the movable body 34 is upward with respect to the second shaft body 31b against the urging force of the first spring 36. Only the lower end of the second shaft body 31b enters the inside of the recess 2a of the fall prevention tool 2, and the tightened member B is tightened. When the tightening work is completed, the movable body 34 has moved to the retracted position P2.

When the tightening of the tightened member B is completed, the rotation of the socket 30 is stopped, the tightening tool 20 is driven upward by the driving means 50, and the movable body 34 is moved to the initial position P1 by the urging force of the first spring 36. The positional relationship between the first shaft body 31a and the second shaft body 31b is restored to the positional relationship at the start of tightening shown in FIG.

As described above with reference to FIGS. 6 to 10, according to the socket 30 of the embodiment, the tightening tool 20 is supported by the carriage 10 and guided by the support means 60 so that the rotation axis can be moved. The tightening tool 20 is guided by the portion 35 to the fitting position where the fitted portion B1 and the fitting portion 33 are fitted. Therefore, even if the actual tightening position where the tightened member B is temporarily tightened to the track structure 1 deviates from the reference position within a range of an assumed error, the fitted portion B1 and the fitting portion 33 And can be automatically fitted, and the tightened member B can be tightened with high work efficiency.

Further, the guide portion 35 is formed on the lower surface of the flange portion 34b, and the movable body 34 having the flange portion 34b is movably supported by the socket body 31 between the initial position P1 and the retracted position P2, and the first spring 36 Is urged toward the initial position P1. Therefore, after the fitted portion B1 and the fitted portion 33 are fitted by the guide portion 35, when the tightened member B is tightened, the flange portion 34b comes into contact with the upper surfaces of the fall prevention tools 2 and 3. However, as shown in FIG. 10, the movable body 34 can move to the retracted position P2, and the fall prevention tools 2 and 3 do not interfere with the tightening work, and the tightening work can be completed.

As described above, according to the tightening socket of the tightened member and the tightening machine of the tightened member according to the embodiment, other members that hinder the tightening work are installed in the vicinity of the tightened member B. The member to be tightened can be tightened with high work efficiency even in the work environment.

Further, as described with reference to FIGS. 6 to 10, according to the socket 30 of the embodiment, the second spring 37 as the second urging means has the second shaft body 31b with respect to the first shaft body 31a. Is urged in the tightening direction X1. Therefore, even if the rotary axis S1 of the tightening tool 20 and the axis S2 of the tightened member B do not match and the lower end of the second shaft body 31b abuts on the fitted portion B1, tightening is performed. The tightening work can be completed without stopping the movement of the tool 20 in the tightening direction X1, and the tightened member B can be tightened with even higher work efficiency. Further, when the lower end of the second shaft body 31b comes into contact with the fitted portion B1, the impact applied to the tightening tool 20, the driving means 50, and the supporting means 60 can be buffered, and the durability of the tightening machine is improved. can.

More specifically, when the rotation axis S1 of the tightening tool 20 and the axis S2 of the tightened member B do not match and the lower end of the second shaft body 31b abuts on the fitted portion B1, the first Only the shaft body 31a continues to descend, and the descending of the second shaft body 31b stops. When the lowering of the second shaft body 31b is stopped, the second spring 37 is held until the rotation shaft center S1 of the tightening tool 20 and the shaft center S2 of the tightened member B are matched by the guide portion 35. The force is accumulated in.

When the rotation axis S1 of the tightening tool 20 and the axis S2 of the tightened member B are matched by the guide portion 35, the urging force accumulated in the second spring 37 is released, and the second shaft body 31b is released. Momentarily moves downward, and the fitted portion B1 and the fitting portion 33 are fitted. When the fitted portion B1 and the fitted portion 33 are fitted, the tightening of the tightened member B is started, and when the tightening is completed, the tightening tool 20 detects a predetermined torque and stops the rotation of the socket 30. do. Further, the drive means 50 reverses the drive direction of the tightening tool 20 and drives the tightening tool 20 upward.

As described above, when the driving means 50 drives the tightening tool 20 downward during the tightening work by urging the second shaft body 31b in the tightening direction X1 by the second spring 37, Until the tightening work is completed, the tightening work can be completed without stopping the movement of the tightening tool 20. Therefore, the tightening work can be completed by a simple control of moving the tightening tool 20 in the tightening direction X1 at a constant speed, and the tightened member B can be tightened with higher work efficiency.

Next, with reference to FIGS. 1 to 5, the carriage 10, the driving means 50, and the supporting means 60 in the tightening machine of the tightened member will be described in more detail.

As shown in FIG. 1, the dolly 10 has a base 11. A pair of wheel portions 12 and a misalignment prevention mechanism 13 are installed on the lower side of the base 11, and a pair of unit units 14, an operation unit 15, and a control unit 16 are installed on the upper side of the base 11. A power supply unit 17 is installed. The pair of unit portions 14 includes a tightening tool 20, a driving means 50, and a supporting means 60, respectively, and are installed above each railroad rail R. The operation unit 15 is gripped by an operator when moving the dolly 10. The control unit 16 controls the tightening tool 20 and the driving means 50. The power supply unit 17 supplies electric power to the tightening tool 20, the driving means 50, and the control unit 16.

Further, as shown in FIGS. 1 to 5, the unit portion 14 has a substantially octagonal tubular body 14a having an open lower portion, an upper support plate 14b, and a lower support plate 14c. A pair of round bar-shaped guide portions 14d are installed in the vertical direction between the upper support plate 14b and the lower support plate 14c. The pair of guide portions 14d guide the vertical movement of the support means 60.

As shown in FIGS. 2 to 5, the drive means 50 is connected to the control unit 16 and the power supply unit 17, and drives the tightening tool 20 up and down by driving the support means 60 up and down.

As shown in FIG. 5, the support means 60 has a base portion 61 connected to the drive means 50, a first movable table 62, and a second movable table 63. The first movable table 62 is supported by the base portion 61 so as to be movable back and forth in a predetermined direction, for example, along the traveling direction Y of the carriage 10. The second movable table 63 is supported by the first movable table 62 so as to be movable left and right along a lateral direction X perpendicular to a direction different from the predetermined direction, for example, a traveling direction Y. The tightening tool 20 is supported by the base portion 61 via the first movable table 62 and the second movable table 63, and can be moved back and forth and left and right.

Hereinafter, the supporting means 60 of the embodiment will be described in more detail, but the specific structure of the supporting means 60 is not limited to the following, and it is sufficient that the tightening tool 20 can be movably supported in the front-back and left-right directions.

As shown in FIGS. 2 and 5, the base portion 61 is formed in a substantially rectangular shape extending along the traveling direction Y, and both front and rear ends are slidably connected to the guide portion 14d and a central portion. Is connected to the drive means 50. Further, as shown in FIGS. 2 to 5, the first movable table 62 is supported on the lower left and right ends of the base portion 61 via the front-rear direction support means. The front-rear direction support means includes a first rail 64 provided along the front-rear direction (Y direction) of the base portion 61, and a first block 65 slidable on the first rail 64.

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 in which the tightening tool 20 is arranged. 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 support 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 support means. The left-right direction support 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 has a space in which the tightening tool 20 is arranged at a substantially central portion, and is formed in a substantially square shape. Specifically, the second movable table 63 has one end connected to the second block 69 of the left-right support means and the other end extended below the extension portion 67 of 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 support 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 in 63, space can be saved.

Further, these support means 60 return the axis of the tightening tool 20 after movement to the origin position before movement when the tightening tool 20 is moved by the front-rear direction support means and the left-right direction support means. Provide a return means.

The origin return means are the front-back 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 said 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 support 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 machine for the tightened member configured in this way is a work information input device (illustrated) for inputting information on the tightening work or loosening work of the tightened member B at a predetermined position for fixing the railroad rail R. No) is provided in the control unit 16. The control unit 16 is configured to output drive control information to the tightening tool 20 and the drive means 50, respectively, and to input work information from an operation panel (not shown) or the like.

The embodiments of the present invention have been described above with reference to the drawings (FIGS. 1 to 10). However, the present invention is not limited to the above embodiment, and can be implemented in various embodiments without departing from the gist of the present invention (for example, (1) to (4) below).

(1) In the above embodiment, the dolly 10 is pushed by the worker and moves to a predetermined tightening position, but the dolly 10 is provided with the drive device of the wheel portion 12 and the tightening position. It is also possible to install a detection device for detection and to allow the dolly 10 to self-propell to the tightening position.

(2) In the above embodiment, the urging force is accumulated between the first shaft body and the second shaft body by the second spring 37, but the lowering operation of the tightening tool 20 is controlled by the control unit 16. Therefore, it is possible to omit the second spring 37. For example, the tightening tool 20 is lowered until the socket 30 comes into contact with the fitted portion B1, and when the socket 30 comes into contact with the fitted portion B1, the tightening tool 20 is controlled to stop lowering and guided. When the tightening tool 20 is guided to the fitting position by the portion 35, the tightening tool 20 is controlled to be lowered again. As described above, the tightening tool 20 can be lowered stepwise to perform the tightening work of the tightened member B.

(3) In the above embodiment, the guide portion 35 has a circular shape, but the present invention is not limited to this, and the guide portion 35 has an elliptical shape, a polygonal shape, or a shape in which a plurality of shapes are combined. It can also be. Further, the radius of curvature of the circumference of the outer edge of the guide portion 35 can be partially reduced. For example, if the circumference of the outer edge of the guide portion 35 is partially reduced so as to be equal to the radius of curvature of the circular opening 35a, the portion can be formed along the outer edge of the circular opening 35a, and the tightening tool 20 can be further formed. It can be reliably guided to the fitting position.

(4) In the above embodiment, the tightening machine for the tightened member has a carriage 10 that moves along the rail R, but the tightening machine for the tightened member is not limited to this. For example, in an automobile factory, if a trolley that moves along a production line is provided, tires can be bolted to the automobile being manufactured, and the present invention can be applied to various uses.

(5) In the above embodiment, the socket 30 is used in the railroad track where the fall prevention devices 2 and 3 are installed, but the socket 30 is also used in the railroad track where the fall prevention devices 2 and 3 are not installed. Even when used on such a railroad track, when the position of the tightened member B deviates from the reference position, the fitted portion B1 and the fitting portion 33 can be automatically fitted, which is high. The tightened member B can be tightened with work efficiency.

B ... Tightened member B1 ... Fitted portion P1 ... Initial position P2 ... Retracted position X1 ... Tightening direction 10 ... Cart 20 ... Tightening tool 30 ... Socket 31 ... Socket body 31a ... First shaft body 31b ... Second Shaft 32 ... Connecting portion 33 ... Fitting portion 34 ... Movable body 34a ... Cylindrical portion 34b ... Flange portion 35 ... Induction portion 36 ... First spring 37 ... Second spring 50 ... Drive means 60 ... Support means

Claims (4)

Supports the tightening tool (20) so that at least the tightening tool (20) that applies a rotational force when tightening the tightened member (B) and the rotation axis of the tightening tool (20) can be moved. A socket for tightening a tightened member used in a tightening machine for a tightened member provided with a support means for tightening.
A shaft-shaped socket body (31) extending along the rotation axis of the tightening tool (20), and a shaft-shaped socket body (31).
A connecting portion (32) formed at one end in the axial direction of the socket body (31) and connected to the tightening tool (20).
A fitting portion (33) formed at the other end of the socket body (31) in the axial direction and fitted with the fitted portion (B1) of the tightened member (B).
A tubular portion (34a) through which the socket body (31) can be inserted, and a fitted portion (B1) of the tightened member (B) formed at one end of the tubular portion (34a). It has a flange portion (34b) facing each other, and is tightened by a predetermined length from the initial position (P1) at the start of tightening and the socket body (31) from the initial position (P1) along the axial direction. A movable body (34) supported by the socket body (31) so as to be movable between the retracted position (P2) in the attachment direction (X1) and the retracted position (P2).
An eccentricity is formed on the surface of the flange portion (34b) facing the fitted portion (B1) with respect to the rotation axis, and the fitting portion (33) is included in a plan view from the rotation axis direction. The tightening tool (20) is guided to a fitting position where the fitting portion (33) is fitted with the fitted portion (B1) by sliding contact with the fitted portion (B1). The concave guide portion (35) and
The first urging means (36) that urges the movable body (34) toward the initial position (P1).
A socket for tightening a member to be tightened. The socket body (31) has a first shaft body (31a) having a connecting portion (32) formed at one end thereof and a fitting portion (33) formed at one end thereof, and has a predetermined range along the axial direction. It has a second shaft body (31b) supported by the first shaft body (31a) so as to be movable with respect to the first shaft body (31a).
The tightened member according to claim 1, further comprising a second urging means (37) for urging the second shaft body (31b) with respect to the first shaft body (31a) in the tightening direction. Socket for tightening. The tightening socket of the tightened member according to claim 1 or 2.
The dolly (10) that moves to the tightening position where the tightened member (B) is tightened,
A tightening tool (20) that applies a rotational force to the tightening socket at least when the tightening member (B) is tightened.
A drive means (50) attached to the carriage (10) and driving the tightening tool (20) along the rotation axis.
Support means (60) that supports the tightening tool (20) on the trolley (10) so that the rotation axis of the tightening tool (20) can be moved.
A tightening machine for the tightened member provided with. The tightening machine for a tightened member according to claim 3, wherein the bogie (10) has a wheel portion (12) for moving along a railroad rail (R).

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