Working machines

Abstract

To provide a working machine which is a working machine used for operation to fasten and fix rails or operation to release tightening and fixing, and can work efficiently, with which work load when repeating fixing work or releasing work is reduced, and which is easy to form compactly the whole compared with the use of leverage principles.SOLUTION: It includes an engagement part 4 that engages with rail fixtures such as pandrol, an input part 21 or an actuator to which power from the outside is input, and a movable mechanism 6 that moves the engaging part 4 directly in the movable direction along the insertion part 51 of a rail fixture 50 by the power from the input part 21 or the actuator, by being moved directly in the movable direction, the insertion part 51 is either inserted into the to-be-inserted part of a shoulder 60 or pulled out from the to-be-inserted part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a work tool used for fastening a rail to a sleeper or for releasing the fastening of a rail to a sleeper. [Background technology]

[0002] A rail fastener called a Pandrol is known which fastens and fixes a rail to a sleeper placed below it. This rail fastener is at least partially made of a wire spring, has a linearly shaped insertion part and an abutment part which abuts against the rail, and is shaped as a clip as a whole.

[0003] This rail fixing device uses its abutment portion to elastically press the rail against the sleeper, and the insertion portion fits into and is removably inserted into the mounting hole (inserted portion) of the shoulder fixed to the sleeper, thereby fastening and fixing the rail to the sleeper.On the other hand, the fastening and fixing of the rail to the sleeper can be released by removing the insertion portion from the mounting hole.

[0004] When inserting the insertion portion into the mounting hole to fasten and fix the rail to the sleeper, or when removing the insertion portion from the mounting hole to release the fastening of the rail to the sleeper, it is necessary to insert the insertion portion into the mounting hole or remove the insertion portion from the mounting hole against the elastic force of the wire spring, which is difficult to do completely by hand.

[0005] In consideration of these circumstances, a work tool (work equipment) has become known which has a rod-shaped main body formed in a straight line, and a hook (engagement portion) which is arranged on the lower end of the main body and which releasably engages with a rail fixing device; the hook is hooked onto the rail fixing device, and the main body with its lower end abutting the shoulder side is grasped by its upper end and swung back and forth around the lower end as a fulcrum, thereby inserting the insertion portion into or removing it from the mounting hole (see, for example, Patent Document 1).

[0006] According to the working tool of the above-mentioned document, a large force can be applied to the rail fixing device by using the principle of leverage, so that fixing and releasing operations can be easily performed.

[0007] However, in such a tool, when the main body is swung back and forth around its lower end as a fulcrum, the hook moves in an arc shape centered on the lower end of the main body, whereas the action of inserting the insertion part into the mounting hole or removing it from the mounting hole is linear, which may result in various problems, such as the need for extra force or the generation of impact force due to elastic force during work, which may reduce work efficiency, and this reduction in work efficiency significantly increases the burden on the worker when repeating fixing and releasing work. Also, in order to apply a large force to the rail fixing tool, the length of the main body must be greater than a certain amount, which makes it difficult to form the whole tool compact. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Publication No. 9-143907 Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has an object to provide a work equipment used for fastening work to fasten a rail with a rail fastener or for releasing work to release that fastening work, which can perform the work efficiently, reduces the workload when fastening or releasing work is repeated, and is easier to form into a compact overall size compared to those that use the principle of leverage. [Means for solving the problem]

[0010] In order to solve the above problems, The work equipment of the present invention comprises:This work equipment is used for a fixing operation in which a straight-lined insertion portion of a rail fixing device, at least a part of which is made of a wire spring, is fitted into and inserted into an inserted portion of a shoulder fixed to the sleeper side supporting the rail, thereby elastically pressing the rail against the sleeper side with an abutment portion provided on the rail fixing device to fasten and fix the rail, or for a release operation in which the fastening and fixing of the rail to the sleeper side is released by removing the insertion portion from the inserted portion, and is characterized by comprising an engagement portion that releasably engages with the rail fixing device, an input portion or actuator to which external power is input, and a movable mechanism that, by power from the input portion or actuator, moves the engagement portion, while engaged with the rail fixing device, in a movable direction that is a direction along the insertion portion.

[0011] The device comprises a base installed on the upper surface side of the sleeper, a transmission case formed to protrude upward from the base, a movement restricting part that restricts the movement of the movable mechanism to the side opposite to the side where the movable mechanism operates the rail fixing device by abutting against the sleeper side, and a rotation restricting part that restricts the rotation of the movable mechanism about the movement restricting part side as a fulcrum by abutting against the rail side when the movable mechanism operates the rail fixing device, at least a part of the movable mechanism is housed in the transmission case, the movement restricting part is formed at an end of the base, and the rotation restricting part has a restricting body that faces directly below the rail and is close to or in contact with the rail. It may also be possible to use the

[0012] The movable mechanism includes an input shaft that is rotationally driven by power from the input portion or the actuator, and includes a speed reduction mechanism that reduces the rotational power of the input shaft, and an operating mechanism that linearly moves the engagement portion in the movable direction by the rotational power reduced by the speed reduction mechanism. It may also be possible to use the

[0013] The actuating mechanism has an actuating shaft formed in the movable direction, and the actuating shaft is configured to move linearly in its axial direction by the rotational power from the input shaft. It may also be possible to use the

[0014] The engaging portion is disposed on at least one end side of the operating shaft, and during a fixing operation or a releasing operation, the engaging portion, the operating shaft, the movement restricting portion, the inserting portion, and the inserted portion are aligned in a straight line in a plan view. It may also be possible to use the

[0015] The input part is provided, and the movable mechanism includes an input shaft that is rotationally driven by power from the input part, a speed reduction mechanism that reduces the rotational power of the input shaft, and an operating mechanism that linearly moves the engagement part in the movable direction by the rotational power reduced by the speed reduction mechanism, and the input part is a head part that is integrally formed on one end side of the input shaft and can be detachably engaged with a spanner, a manual wrench, or an impact wrench. It may also be possible to use the

[0016] A tip-over prevention part is provided that is in close proximity to or in contact with the side surface of the rail to prevent a part or the whole including the movable mechanism from tipping toward the rail. It may also be possible to use the

[0017] The movable mechanism has an operating shaft formed in the movable direction, and a hydraulic actuator that moves the operating shaft in the axial direction. It may also be possible to use the

[0018] On the other hand, the working equipment of the present invention is used for a fixing operation in which a linearly formed inserting portion of a rail fixing device at least partially constituted by a wire spring is fitted and inserted into a receiving portion of a shoulder fixed to the sleeper side supporting the rail, thereby elastically pressing the rail against the sleeper side by an abutting portion provided on the rail fixing device to fasten and fix the rail, or for a releasing operation in which the fastening and fixing of the rail to the sleeper side is released by removing the inserting portion from the receiving portion, and is a working equipment comprising an engaging portion that detachably engages with the rail fixing device, an input portion or actuator to which external power is input, and a movable mechanism that linearly moves the engaging portion, which is engaged with the rail fixing device, in a movable direction that is a direction along the inserting portion, by the power from the input portion or the actuator, and the movable mechanism is a movable mechanism that moves the engaging portion, which is engaged with the rail fixing device, in a movable direction that is a direction along the inserting portion, by the power from the input portion or the actuator, and the movable mechanism is a movable mechanism that moves the engaging portion in a state where the engaging portion is engaged with the rail fixing device, in a movable direction that is a direction along the inserting portion, by the power from the input portion or the actuator, and the movable mechanism is a movable mechanism that moves the engaging portion in a state where the engaging portion is engaged with the rail fixing device, in a movable direction that is a direction along the inserting portion, by the power from the input portion or the actuator, and the movable mechanism is a movable mechanism that moves the engaging portion in a movable state .... and an operating mechanism for linearly moving the engaging portion in the movable direction by the rotational power reduced by the reduction mechanism, the operating mechanism having an operating shaft formed in the movable direction, the operating shaft being linearly moved in its own axial direction by the rotational power from the input shaft, the reduction mechanism having an input gear attached to the input shaft and rotating integrally with the input shaft, and an output gear supported rotatably about the axis of the operating shaft and meshing with the input gear, the operating mechanism having a female screw formed on an inner peripheral surface of an insertion hole drilled in the output gear, and a male screw formed on an outer peripheral surface of the operating shaft so that the operating shaft can be threadably engaged with and inserted into the insertion hole, and the operating shaft, whose rotation about its own axis is restricted, is linearly moved in its axial direction by the rotation of the output gear. .

[0019] The input gear is a worm gear, and the output gear is configured to mesh with the worm gear. It is also possible to use the following. Effect of the Invention

[0020] According to the work equipment of the present invention, the engagement portion that engages with the rail fixing device moves linearly in accordance with the operating direction of the insertion portion, making it possible to perform work efficiently, reducing the workload when repeating fixing or releasing operations, and making it easier to form the entire equipment compact compared to equipment that uses the principle of leverage. [Brief description of the drawings]

[0021] [Figure 1] 1 is a plan view showing a configuration of a work device to which the present invention is applied; [Diagram 2] 1 is a side view showing a configuration of a work machine to which the present invention is applied. [Diagram 3] FIG. 3 is a front view showing the configuration of the work implement shown in FIGS. 1 and 2 with rails, sleepers, and insulators cut away. [Figure 4] 4 is a side view showing a state in which a release operation is performed by the working implement shown in FIGS. 1 to 3. FIG. [Diagram 5] FIG. 2 is a front view showing the configuration of a transport device that transports a work tool. [Figure 6] FIG. 11 is a plan view showing a configuration of a work implement according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Figures 1 and 2 are a plan view and a side view showing the configuration of a work equipment to which the present invention is applied, and Figure 3 is a front view showing the configuration of the work equipment shown in Figures 1 and 2 with the rails, sleepers and insulators cut away. A pair of left and right rails R laid in the front-rear direction, which is the running direction of a train, are fastened and fixed by rail fixing devices 50 to the upper surfaces of a number of sleepers T arranged in parallel in the front-rear direction.

[0023] In this example, the rail R is a flat-bottom rail, and has a wide bottom R1 that is grounded on the side of the sleeper T, a head R2 that is located directly above the bottom R1 and is narrower than the bottom R1, and a web R3 that connects the bottom R1 and the head R2 and is even narrower than the head R2. The sleeper T is made of wood or concrete and formed into a rectangular column extending in the left-right direction, and a road pad P is laid on its upper surface.

[0024] The rail R is installed in a self-supporting state on a road pad P. A shoulder 60 is installed on each of the left and right sides of the road pad P on the sleeper T. The shoulder 60 is embedded and fixed in the sleeper T from its middle to its lower part, and its upper part becomes an exposed part 61 that protrudes upward from the sleeper T and is exposed.

[0025] A mounting hole (inserted portion) 61a, which is a round hole that penetrates the exposed portion 61 in a direction parallel to the rail R, is drilled in a central portion of the exposed portion 61 in a front view. Incidentally, the road pad P is formed with a recess P1 that is a square cutout so as to avoid the exposed portion 61 in a plan view.

[0026] The rail fixing device 50 is a linear spring bent into a clip shape in a plan view. A portion (one end) of the rail fixing device 50 near one end becomes an insertion part 51 formed in a straight line in a direction along the formation direction of the rail R and the mounting hole 61a (specifically, a direction parallel to the rail R and the mounting hole 61a).

[0027] The rail fixing device 50 has a connection portion 52 that is continuous with the insertion portion 51 and has a U-shape in a planar view, a parallel portion 53 that is continuous with the connection portion 52 and parallel to the insertion portion 51 and has the same height as the insertion portion 51, an engaged portion 54 that is continuous with the parallel portion 53 and has a U-shape in a planar view and an inverted U-shape in a front view, and an abutment portion 56 that is continuous with the engaged portion 54 and abuts against the sleeper T side.

[0028] The parallel portion 53 and the engaged portion 54 form an "U" shape when viewed from the side, and the entire or most part of the abutment portion 56 forms a straight line parallel to the insertion portion 51 at a position higher than the insertion portion 51, and its end face faces away from the end face of the insertion side of the insertion portion 51.

[0029] The rail R is supported on the pavement pad P, and the insertion portion 51 of the rail fixing device 50 is inserted into the mounting hole 61a against the elastic force of the rail fixing device 50, so that the abutment portion 56 elastically abuts against the upper surface side of the bottom portion R1 of the rail R, thereby fastening the rail R to the sleeper T side.

[0030] That is, the operation of inserting the insertion portion 51 into the mounting hole 61a corresponds to a fixing operation for fastening and fixing the rail R to the sleeper T. On the other hand, the operation of removing the insertion portion 51 from the mounting hole 61a corresponds to a releasing operation for releasing the fastening and fixing of the rail R to the sleeper T. The fixing operation and releasing operation are efficiently performed using the work equipment 1.

[0031] Incidentally, an insulator 70 made of an insulating material is interposed between the bottom R1 of the rail R and the abutment portion 51. In other words, the elastic force of the abutment portion 51 toward the sleeper T acts on the rail R via the insulator 70. The insulator 70 is formed in an L-shape extending from the upper surface of the bottom R1 of the rail R to the outer side surface in a front cross section. The insulator 70 is also formed with a rectangular notched recess 71 in a plan view to avoid the exposed portion 61.

[0032] Next, the configuration of the work implement 1 will be described with reference to Figs.

[0033] The work equipment 1 is made up of components mostly made of metal materials, and specifically includes a base 2 shaped like a rectangular plate that is long in the movable direction (front-to-rear direction), a transmission case 3 formed to protrude upward from the middle of the front-to-rear direction of the base 2, a hook (engagement portion) 4 that releasably hooks onto and engages with an engaged portion 54 of a rail fixing device 50, and a movable mechanism 6 that houses at least a portion of the transmission case 3 and linearly moves the hook 4 in a movable direction that is a direction along (specifically, a direction parallel to) the insertion portion 51.

[0034] The movable mechanism 6 has an operating shaft 7 formed in the movable direction, an operating mechanism that moves the operating shaft 7 linearly in its axial direction, and a reduction mechanism that reduces the speed of the input rotational power and transmits it to the operating mechanism (operating shaft 7).

[0035] The diameter of the attachment portions 11, 11, which are the portions near both ends in the axial direction of the operating shaft 7, is set to be smaller than the diameter of the operating portion 12, which is the middle portion, and hooks 4, 4 are attached and supported so as to be vertically rotatable on the tip side of each of the front and rear attachment portions 11. Each hook 4 is configured to be switchable between a use position facing in the movable direction and a storage position facing upward by this vertical rotation.

[0036] The operating mechanism is rotatably supported in the operating side housing portion 13 of the transmission case 3. Ta The actuator has an output gear 14 and the operating shaft 7. The output gear 14 has an insertion hole 16 formed in its center, through which the operating shaft 7 is inserted vertically or approximately vertically. A male screw 12a is formed in a helical shape on the outer circumferential surface of the operating portion 12 of the operating shaft 7. Meanwhile, a female screw 16a that threadably engages with the male screw 12a is formed on the inner circumferential surface of the insertion hole 16.

[0037] A through hole 13a is formed in the actuation side housing portion 13, through which the actuation portion 12 of the actuation shaft 7 passes. A surface (cross section) obtained by cutting this actuation portion 12 (actuation shaft 7) along a plane perpendicular to its axial direction is formed into a shape consisting of an arc of at least a semicircle and a chord connecting both ends of the arc. In other words, a flat notched surface 12b is formed on the outer peripheral surface of the actuation portion 12. Meanwhile, the through hole 13a is formed into a shape that is the same or approximately the same as the cross-sectional shape of the actuation portion 12 (actuation shaft 7).

[0038] That is, the working shaft 7 is supported on the operating accommodation portion 13 side (transmission case 3 side) in a state in which its rotation around its axis is restricted (prohibited) and its movement in the axial direction is possible. Incidentally, the rotation of the working shaft 7 is also restricted by the engagement between the hook 4 attached to the working shaft 7 and the engaged portion 54 of the rail fixing device 50.

[0039] According to this configuration, the rotation of the output gear 14 allows the working shaft 7 to move in both directions in the axial direction of the working shaft 7. 14 Rotation in one direction causes the movable member to slide in one direction, while rotation in the other direction causes the movable member to slide in the other direction.

[0040] The reduction gear mechanism includes an input shaft 18 extending in the vertical direction, at least a portion of which is accommodated in the reduction gear side accommodation portion 17 of the transmission case 3 and rotatably supported on the reduction gear side accommodation portion 17 side (transmission case 3 side), and an output gear 19 which is integrally attached to the input shaft 18. 14 the input gear 19 which is a worm gear that is constantly meshed with the output gear 14, an input portion 21 to which rotational power is input, and the output gear 14.

[0041] The input shaft 18 is supported rotatably about its own axis in a position perpendicular to the operating shaft 7 in a side view, with its upper end protruding upward from the reduction gear side accommodating portion 17 and exposed to the outside, and an input portion 21 is provided integrally with this upper end. An input gear 19 that rotates integrally with the input shaft 18 is attached and fixed to a lower portion of the input shaft 18 located inside the reduction gear side accommodating portion 17.

[0042] The input portion 21 is a head portion that rotates integrally with the input shaft 18, and this head portion 21 is capable of engaging tools such as a wrench, a manual spanner, or an electric impact wrench, and the rotational power from these tools is transmitted to the input shaft 18 via the input portion 21.

[0043] When rotational power is input to the input shaft 18 in this manner, the input gear 19 rotates integrally with the input shaft 18. The rotational power of the input gear 19 is transmitted to the output gear 14. As described above, the rotational power of the output gear 14 is converted into linear motion in the movable direction of the working shaft 7. When the power is transmitted from the input gear 19 to the output gear 14, the rotational speed is reduced due to the relationship between the numbers of teeth of both gears 14, 19.

[0044] Incidentally, when the rotational motion of the output gear 14 is converted into the linear motion of the working shaft 7 by the male screw 12a and the female screw 16a, the speed is also reduced so that the small rotational force of the output gear 14 is converted into a large axial working force of the working shaft 7. In other words, this working mechanism also functions as a speed reduction mechanism.

[0045] In addition, since a large force acts on the operating shaft 7 in the axial direction, that is, the front and rear, a reaction force acts on the transmission case 3. For this reason, rib-shaped reinforcing frames 22, 22, etc. are provided which connect the front and rear faces of the transmission case 3 to the upper face of the base 2 and reinforce the strength.

[0046] Both longitudinal ends of the base 2 abut against the sleeper T side (specifically, the shoulder 60), thereby forming movement restriction sections 2a, 2a that restrict (prohibit) movement of the base 2 in the movable direction during fixing or releasing operations.

[0047] Specifically, when performing the fixing work, as shown in Figures 1 and 2, the rail fixing device 50 with the tip side of the insertion part 51 facing the shoulder 60 (sleeper T side), the shoulder 60 (sleeper T), and the work equipment 1 are lined up in this order in the movable direction, and with the hook 4 hooked and engaged with the engaged part 54 of the rail fixing device 50 from the inside of the curved part, the insertion part 51 is slightly manually inserted into the mounting hole 61a of the shoulder 60 to complete the preparation. Incidentally, the hook 4 may be engaged with and disengaged from the engaged part 54 by rotating the hook 4 up and down.

[0048] At this time, the position of the operating shaft 7 is adjusted so that the movement restricting portion 2a on the shoulder 60 side of the base 2 abuts against the shoulder 60 and the engagement between the hook 4 and the engaged portion 54 is maintained. In this way, the hook 4, the operating shaft 7, the movement restricting portion 2a, the insertion portion 51, and the mounting hole 61a are aligned in a straight line in the movable direction in a plan view.

[0049] Then, using the above-mentioned tool, the operating shaft 7 is slid against the elastic force of the rail fixing device 50 toward the side where the insertion portion 51 is inserted into the mounting hole 61a of the shoulder 60, and when the insertion portion 51 is inserted into the mounting hole 61a, the fixing operation is completed.

[0050] During this fixing operation or the releasing operation described below, a force acts on the work equipment 1 including the transmission case 3, movable mechanism 6, base 2, etc., to rotate about the movement regulating part 2a side, which is the contact part between the base 2 and the sleeper T, but a rotation regulating member (rotation regulating part) 23 that resists this force and regulates the rotation of the work equipment 1 is removably provided on the movement regulating part 2a on the side not contacting the shoulder 60 of the base 2.

[0051] The rotation restricting member 23 has an attachment / detachment tool 24 extending in a direction perpendicular to the movable direction, and a rod-shaped restriction body 26. The attachment / detachment tool 24 is formed in an inverted T-shape symmetrical in the movable direction in a side view so that it can be detachably attached and fixed to either of the front and rear movement restricting parts 2a, 2a.

[0052] At the center of the movable direction of the attachment / detachment tool 24, a mounting hole 24a is drilled in the left-right direction, which is a direction intersecting (specifically, perpendicular to) the movable direction and running along both horizontal or nearly horizontal surfaces of the base 2. With one end of the regulating body 26 facing directly below the rail R, the portion near the other end is fitted and inserted into the mounting hole 24a and fixed.

[0053] In this way, the regulating body 26 detachably fixed to the base 2 is configured to come close to or abut against the lower surface of the bottom part R1 of the rail R, thereby regulating (prohibiting) the above-mentioned rotation of the working equipment 1 including the transmission case 3, the movable mechanism 6, the base 2, etc. Incidentally, the operation of switching to such rotation regulation by the rotation regulating member 23 is actually performed in the above-mentioned preparation stage.

[0054] Furthermore, if the hook 4, operating shaft 7, movement regulating part 2a, insertion part 51, and mounting hole 61a are aligned in a straight line in the movable direction even when viewed from the side, even if a force is applied to the rail fixing device 50 in the movable direction via the hook 4, no force will act on the work equipment 1 to rotate it up and down around the movement regulating part 2a as a fulcrum, making it possible to omit the rotation regulating member 23.

[0055] Fig. 4 is a side view showing a state where the release operation is performed by the working equipment shown in Fig. 1 to Fig. 3. As shown in the figure, when performing the release operation, the rotation restriction member 23 is detachably attached and fixed to the side of the front and rear movement restriction parts 2a of the base 2 opposite to the side used during the fixing operation. In addition, the pair of front and rear hooks 4, 4 are used on the opposite side to the side used during the fixing operation.

[0056] Then, the work equipment 1, with the position of the operating shaft 7 appropriately adjusted, is placed on the opposite side of the rail fixing device 50 of the shoulder 60, and the hook 4 is hooked onto and engaged with the engaged portion 54 of the rail fixing device 50, with the insertion portion 51 inserted and fixed into the mounting hole 61a of the shoulder 60, from the outside of the curved portion, and the movement regulating portion 2a on the shoulder 60 side of the base 2 is abutted against the shoulder 60, and the portion of the regulating body 26 near the tip of the rotation regulating member 23 attached to the movement regulating portion 2a on the opposite side of the movement regulating portion 2a is brought close to or into abutment with the underside of the bottom R1 of the rail R, completing the preparation.

[0057] In the preparatory stage for this release operation, the hook 4, the operating shaft 7, the movement restricting portion 2a, the insertion portion 51, and the mounting hole 61a are aligned in a straight line in the movable direction in a planar view, similar to the preparatory stage for the fixing operation.

[0058] Next, the operating shaft 7 is slid by the above-mentioned tool against the elastic force of the rail fixing device 50 so that the insertion portion 51 is removed from the mounting hole 61a of the shoulder 60, and the release operation is completed.

[0059] During such release work, an impact may occur due to the elastic force of the rail fixing device 50, which may cause a part or the whole, including the movable mechanism 3, to fall toward the rail R. Incidentally, since almost all of the components of this work equipment 1 are mounted on the base 2 so that they do not naturally separate, there is a risk that the whole, including the movable mechanism 3, may fall sideways toward the rail R.

[0060] A tip-over prevention member (tip-over prevention portion) 27 for preventing this sideways tipping is interposed between the transmission case 3 and the abdominal portion R3 of the rail R. The tip-over prevention member 27 is formed in a U-shape in a plan view so as to be detachably fitted into the side portion of the transmission case 3 on the rail R side, and its end portion is in close proximity to or in contact with the side surface of the abdominal portion R3 of the rail R.

[0061] In addition, a transfer prevention part (not shown) having a similar function may be integrally formed with the transmission case 3 or other parts such as the base 2, and conversely, it is not necessary to position the anti-tip member 27 on the transmission case 3.

[0062] According to the working device 1 configured as above, by switching the mounting position of the rotation restricting member 23 between front and rear, it is possible to perform both the fixing operation and the releasing operation without replacing parts.

[0063] In addition, the linear motion of the hook 4 also facilitates smooth and rapid fastening and release operations. Incidentally, when fastening and release operations are repeatedly performed manually using a conventionally known work equipment called a pump puller, for example, this is heavy work, but with this work equipment 1, the work can be performed efficiently by linear motion in the movable direction of the hook 4, and fastening and release operations can be performed using the power of an impact wrench, etc., so the workload is greatly reduced.

[0064] Furthermore, in order to prevent the work equipment 1 from moving or rotating, it would normally be necessary to make the work equipment 1 heavy, but since the movement and rotation of the work equipment 1 are reliably restricted by the movement restricting part 2a and the rotation restricting member 23, it is easy to make the work equipment 1 itself lighter.

[0065] As shown by virtual lines in Figures 2 and 3, an actuator 28 such as an electric motor may be provided at the upper end of the input shaft 18 instead of the input portion 21, and the rotational power generated by this actuator 28 may be transmitted to the input shaft 18.

[0066] 2 and 3, a control unit 29 may be provided that automatically controls the actuator 28 in accordance with the position of the operating shaft 7 in the movable direction. In this case, one or more detection sensors 31, 32 that detect that the operating shaft 7 or the rail fixture 50 has moved to a predetermined position relative to the base 2, and a detection sensor (not shown) that detects the relative position of the operating shaft 7 or the rail fixture 50 with respect to the base 2 are provided. The control unit 28 controls the actuator 28 based on the detection results of these detection sensors 31, 32, and automatically performs the fixing and releasing operations.

[0067] Furthermore, the movable mechanism and the actuator may be constituted by a hydraulic actuator such as a hydraulic cylinder that is attached and supported by the base 2 and expands and contracts in the movable direction. In this case, the hook 4 is attached to the tip of the piston rod so as to be vertically rotatable.

[0068] Next, the configuration of a transport device 80 that transports the work equipment 1 will be described with reference to FIG.

[0069] 5 is a front view showing the configuration of a transport device for transporting work equipment. The transport device 80 includes a body 82 that runs on rails R using wheels 81, 81 on the left and right, a support frame 83 that protrudes upward from the body 82, a slider 84 that can slide up and down on the support frame 82, and a movable frame 86 that is connected and fixed at its midpoint to the slider 84 via a connecting member 85 and extends in the vertical direction.

[0070] The work equipment 1 is detachably attached and fixed to the lower end of the movable frame 86. That is, the work equipment 1 is transported in a state in which it is suspended and supported by the transport device 80 that runs on the rail R.

[0071] Next, with reference to FIG. 6, another embodiment of the present invention will be described with reference to the points different from the above embodiment.

[0072] Fig. 6 is a plan view showing the configuration of a work implement according to another embodiment of the present invention. In the work implement 1 shown in the figure, a transmission case 3 including an operating shaft 7 is supported on a base 2 by a rotary table 33 so as to be horizontally rotatable back and forth. An anti-tipover part 27 is formed integrally with an extension part 2b of the base 2 that extends towards the rail 1 side.

[0073] During the fixing or releasing operation, when the movement restricting part 2a at one end of the movable direction of the base 2 is brought into contact with the shoulder 60, the rotating table 33 is rotated and fixed in position so that the hook 4 faces the shoulder 60, and the rotation restricting member 23 is attached to the part near the other end. The subsequent operations are the same as those of the above-mentioned embodiment.

[0074] According to the work implement 1 having this configuration, it is not necessary to attach the hooks 4 to both ends of the working shaft 7, so the configuration is simplified and further miniaturization is possible. [Explanation of symbols]

[0075] 1 Work equipment 2. Bass 2a Movement control section 4 Hook (engagement part) 6 Movable mechanism 12a Male thread 14 Output Gear 16 Insertion hole 16a Female thread 19 Input Gear 21 Head section (input section ) 23 Rotation restriction member (rotation restriction portion) 27 Anti-tip member (anti-tip part) 28 Actuator 50 Rail fixing device (wire spring, pandrol) 51 Insertion section 56 Contact part 60 Shoulder R rail T sleepers

Claims

1. This is a work tool used for a fixing operation in which a linearly formed inserting portion of a rail fixing device, at least a part of which is made of a wire spring, is fitted and inserted into a receiving portion of a shoulder fixed to the sleeper supporting the rail, thereby fastening and fastening the rail to the sleeper by a contact portion provided on the rail fixing device, or for a release operation in which the fastening and fastening of the rail to the sleeper is released by removing the inserting portion from the receiving portion, A base is installed on the upper surface side of the sleeper; a transmission case formed to protrude upward from the base; an engagement portion that is detachably engaged with the rail fixing device; an input unit or actuator to which external power is input; a movable mechanism that linearly moves the engagement portion, which is engaged with the rail fastener, in a movable direction that is a direction along the insertion portion, by power from the input portion or the actuator; a movement restriction portion that restricts the movement of the movable mechanism to a side opposite to the side where the movable mechanism operates the rail fixing device by contacting the sleeper side; a rotation restriction part that restricts the movable mechanism from rotating about the movement restriction part side as a fulcrum by contacting the rail side when the movable mechanism operates the rail fixing device, At least a portion of the movable mechanism is accommodated in the transmission case, The movement restricting portion is formed at an end portion of the base, The rotation restricting portion has a restricting body that faces directly below the rail and is in close proximity to or in contact with the rail. A work device characterized by:

2. the movable mechanism includes an input shaft that is rotationally driven by power from the input portion or the actuator, and includes a speed reduction mechanism that reduces the rotational power of the input shaft, and an operating mechanism that linearly moves the engagement portion in the movable direction by the rotational power reduced by the speed reduction mechanism, The actuating mechanism has an actuating shaft formed in the movable direction, The operating shaft is configured to be moved linearly in its axial direction by the rotational power from the input shaft, The engagement portion is disposed on at least one end side of the operating shaft, During a fixing operation or a releasing operation, the engaging portion, the operating shaft, the movement restricting portion, the inserting portion, and the inserted portion are aligned in a straight line in a plan view.

2. The work implement of claim 1.

3. Providing the input unit, the movable mechanism includes an input shaft that is rotationally driven by power from the input portion, a reduction mechanism that reduces the rotational power of the input shaft, and an operating mechanism that linearly moves the engagement portion in the movable direction by the rotational power reduced by the reduction mechanism, The input portion is a head portion that is integrally formed on one end side of the input shaft and is capable of releasably engaging with a spanner, a manual wrench, or an impact wrench.

2. The work implement of claim 1.

4. A tip-over prevention part is provided that is in close proximity to or in contact with the side surface of the rail to prevent a part or the whole including the movable mechanism from tipping toward the rail.

2. The work implement of claim 1.

5. The movable mechanism has an operating shaft formed in the movable direction, and a hydraulic actuator that moves the operating shaft in the axial direction.

2. The actuator of claim 1.

6. A work tool used for a fixing operation in which a straight-lined insertion portion of a rail fixing device, at least a part of which is made of a wire spring, is inserted into and fitted into an insertable portion of a shoulder fixed to the sleeper supporting the rail, thereby fastening and fastening the rail against the sleeper by an abutment portion provided on the rail fixing device, or for a release operation in which the fastening and fastening of the rail to the sleeper is released by removing the insertion portion from the insertable portion, an engagement portion that is detachably engaged with the rail fixing device; an input unit or actuator to which external power is input; a movable mechanism that linearly moves the engagement portion, which is engaged with the rail fastener, in a movable direction that is a direction along the insertion portion, by power from the input portion or the actuator, the movable mechanism includes an input shaft that is rotationally driven by power from the input portion or the actuator, and includes a speed reduction mechanism that reduces the rotational power of the input shaft, and an operating mechanism that linearly moves the engagement portion in the movable direction by the rotational power reduced by the speed reduction mechanism, The actuating mechanism has an actuating shaft formed in the movable direction, The operating shaft is configured to be moved linearly in its axial direction by the rotational power from the input shaft, the reduction mechanism includes an input gear attached to the input shaft and rotating integrally with the input shaft, and an output gear supported rotatably about an axis of the operating shaft and meshing with the input gear, the actuating mechanism has a female thread formed on an inner peripheral surface of an insertion hole formed in the output gear, and a male thread formed on an outer peripheral surface of the actuating shaft so that the actuating shaft can be threadably engaged with and inserted into the insertion hole, The rotation of the output gear causes the working shaft, whose rotation about its own axis is restricted, to move linearly in its axial direction. A work device characterized by:

7. the input gear is a worm gear, The output gear is configured to mesh with the worm gear.

7. The work implement according to claim 6.

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