JP4192025B2 - Rail drilling machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a rail clamping mechanism for positioning a rail during drilling in a rail drilling machine.
[0002]
[Prior art]
In the rail clamping mechanism shown in Patent Document 1 below, a toggle clamp type is disclosed as a manual operation link mechanism that opens and closes a movable clamp with respect to a fixed clamp.
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2001-232506
[Problems to be solved by the invention]
However, the toggle clamp type manual operation link mechanism has a risk that the drilling may be hindered because the clamping force of the movable clamp against the fixed clamp tends to be insufficient if the force with which the cutter is pressed against the rail during drilling increases. .
[0005]
An object of the present invention is to securely clamp a rail between a fixed clamp and a movable clamp in a rail clamping mechanism of a rail drilling machine.
[0006]
[Means for Solving the Problems and Effects of the Invention]
The present invention will be described with reference to the drawings of the following embodiments (first embodiment shown in FIGS. 1 to 5 and 8 and second embodiment shown in FIGS. 6 to 7).
[0007]
The rail drilling machine according to the invention of claim 1 corresponds to the first and second embodiments and is configured as follows.
This rail drilling machine includes a drive source (1), a support base (2) on which the drive source (1) is placed, and a cutter that rotates in conjunction with the output transmission mechanism (10) of the drive source (1). A cutter support mechanism (3) having a detachable portion (12) and a rail clamping mechanism (4) for positioning the rail (30) at the time of drilling are provided.
[0008]
The cutter support mechanism (3) is arranged with the rotation center line (12a) of the cutter attaching / detaching portion (12) in the lateral direction (X). The rail clamping mechanism (4) arranged facing the mouth (14a) of the cutter attaching / detaching portion (12) of the cutter supporting mechanism (3) is fixed to the fixed frame (16) attached to the supporting base (2). ), A fixed clamp (17) provided on the fixed frame (16), a holding lever (18) supported by the rotation support portion (23) so as to be rotatable with respect to the fixed frame (16), and the holding comprises a lever (18) in against detachably and moved adjustably arranged a movable clamp (19), and a rail clamping portion provided between the fixed clamp (17) and movable clamp (19) (21) ing.
[0009]
In particular, the rail clamping mechanism (4) includes a screw operation mechanism (34). In this screw operation mechanism (34), the clamping lever (18) is rotated relative to the fixed frame (16) by relative movement of the feed screw portion (36, 38, 44, 46) accompanying the operation of the handle (39, 47). Move the movable clamp (19) toward and away from the fixed clamp (17).
[0010]
In this rail drilling machine, the base part (31) and head part (33) of the rail (30) installed on the rail clamping part (21) are attached and detached between the fixed clamp (17) and the movable clamp (19). This rail (30) is attached by the cutter (15) attached to the cutter attaching / detaching portion (12) in the clamped state (P) clamped in the clamping direction (X) along the rotation center line (12a) of the portion (12). ) In the column (32) between the base (31) and the head (33) .
In addition to the movable clamp (19) that clamps the base (31) and the head (33) of the rail (30) between the clamping lever (18) and the fixed clamp (17), a clamping lever ( Auxiliary clamp (20) capable of pressing and contacting the support (32) of the rail (30) in the clamped state (P) while being moved toward and away from the fixed clamp (17) as the rotation of 18) is attached. The clamp (20) is supported so as to be movable and adjustable along the clamping direction (X) with respect to the clamping lever (18) in the clamped state (P).
[0011]
The invention of claim 2 corresponds to the first embodiment, and is configured as follows on the premise of the invention of claim 1.
In the screw operation mechanism (34), a support shaft (35) having a male screw portion (36) as the feed screw portion is attached to the connecting portion (40) supported by the fixed frame (16). A connecting portion (41) in which an operation tube (37) having a female screw portion (38) as the feed screw portion to which the male screw portion (36) of the support shaft (35) is screwed is supported by the clamping lever (18). Is inserted so that it can rotate around the axis (35a) of the support shaft (35), and the operating cylinder (37) is attached to the handle (39) with respect to the connecting portion (41) of the clamping lever (18). ) To move the internal thread portion (38) of the operating cylinder (37) in the direction of the axial center (35a) relative to the external thread portion (36) of the support shaft (35). With the movement of (38), the operation cylinder (37) is moved to the clamping lever (1 ) Sandwiched lever moves with connecting portions (41) (18) rotates relative to the fixed frame (16) of.
[0012]
The invention of claim 3 corresponds to the second embodiment, and is configured as follows based on the invention of claim 1.
In the screw operation mechanism (34), a connecting portion (45) supported by the fixed frame (16) is provided with a female screw portion (46) as the feed screw portion, and the connecting portion is supported by the clamping lever (18). The operating shaft (43) is inserted through (48) so as to be able to rotate about its axis (43a), and the male screw portion (44) as the feed screw portion provided on the operating shaft (43). Is screwed into the female screw portion (46), and the operating shaft (43) is rotated by the handle (47) with respect to the connecting portion (48) of the holding lever (18), thereby connecting the fixed frame (16). The male screw part (44) of the operating shaft (43) rotates relative to the female screw part (46) of the part (45) and moves in the direction of the axial center (43a). As the male screw part (44) moves, This operating shaft (43) is the clamping lever (18). Clamping lever moves with connecting portions (48) (18) rotates relative to the fixed frame (16).
[0013]
In the first to third aspects of the invention, since the screw operating mechanism (34) is employed as a fastening mechanism of the movable clamp (19) with respect to the fixed clamp (17), the cutter (15) is pressed against the rail (30) during drilling. Even if the force increases, the clamping force of the movable clamp (19) against the fixed clamp (17) is maintained, and the rail (30) is securely positioned between the fixed clamp (17) and the movable clamp (19). Can be pinched.
[0017]
Further, in the first to third aspects of the invention, the movable clamp (19) can be replaced or adjusted while the rail (30) is temporarily tightened between the auxiliary clamp (20) and the fixed clamp (17). Can be easily performed.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
[First Embodiment]
First, a rail punching machine according to a first embodiment of the present invention will be described with reference to FIGS.
[0019]
<Outline of rail drilling machine>
The rail drilling machine shown in FIGS. 1 and 2 includes a drive source 1 that is a gasoline engine, a support base 2 on which the drive source 1 is placed, a cutter support mechanism 3 that is linked to the drive source 1, and a rail 30 at the time of drilling. And a rail clamping mechanism 4 for positioning the
[0020]
The support table 2 includes a mounting table 5 with both front and rear legs having left and right guide rods 5a and 5b for movably supporting the movable table 6 on which the driving source 1 is mounted, and a movable support incorporated in the mounting table 5. And a mechanism 7. The horizontal direction along the moving direction of the movable table 6 is defined as the front-rear direction X (lateral direction), the horizontal direction orthogonal to the front-rear direction X is defined as the left-right direction Y, and the vertical direction orthogonal to these directions X, Y is defined as the horizontal direction. The vertical direction is Z. The movable support mechanism 7 includes an operation mechanism attached to the rear side of the mounting table 5 in addition to the movable table 6 and the left and right guide rods 5a and 5b inserted on the left and right sides of the movable table 6. 8 is provided.
[0021]
In addition to the engine body 9, the drive source 1 (gasoline engine) includes an output transmission mechanism 10 that transmits the rotation of the engine body 9 to the cutter support mechanism 3.
[0022]
The cutter support mechanism 3 is disposed on the support table 2 below the front side of the mounting table 5, and is attached to the cover 10 a of the output transmission mechanism 10 with a cover 11. As shown in FIG. 5, a cutter attaching / detaching portion 12 is rotatably supported by front and rear bearings 13 in the cover 11 of the cutter support mechanism 3. The cutter attaching / detaching portion 12 is interlocked with the output transmission mechanism 10. A rotation center line 12 a of the cutter attaching / detaching portion 12 extends in the front-rear direction X. A cutter insertion / removal hole 14 is formed around the rotation center line 12a in the cutter attaching / detaching portion 12, and the mouth portion 14a faces forward. A perforation cutter 15 such as a hole cutter or a drill is attached to and detached from the cutter insertion / removal hole 14 of the cutter attaching / detaching portion 12 through a mouth portion 14a.
[0023]
The operation mechanism 8 causes the movable table 6 of the support table 2 to reciprocate in the front-rear direction X along the left and right guide bars 5a and 5b together with the drive source 1, the cutter support mechanism 3, and the like.
[0024]
<Details of the rail clamping mechanism 4 shown in FIGS.
The rail clamping mechanism 4 is disposed facing the mouth portion 14a of the cutter attaching / detaching portion 12 of the cutter support mechanism 3, and both left and right fixed frames 16, left and right fixed clamps 17, left and right both clamping levers 18, and both left and right movable. A clamp 19, left and right auxiliary clamps 20, and a rail clamping portion 21 are provided.
[0025]
The left and right fixed frames 16 are connected to each other and mounted on the mounting table 5 of the support table 2. The left and right fixed clamps 17 are detachably attached to the left and right fixed frames 16 by fastening members 22 (bolts and nuts) and can be exchanged, and can be moved and adjusted slightly in the longitudinal direction X and the vertical direction Z. .
[0026]
The left and right clamping levers 18 are rotatably supported by the rotation support portions 23 with respect to the left and right fixed frames 16 and extend downward from the left and right rotation support portions 23. Are connected to each other. Long holes 25 are extended in the vertical direction Z on both the upper and lower sides of the left and right movable clamps 19. With the left and right movable clamps 19 applied to the left and right end portions 24a of the connecting body 24, the left and right movable clamps 19 are applied with stoppers 26, and inserted into the upper and lower sides of the left and right movable stoppers 26. Fastening members 27 (bolts) are screwed to the left and right end portions 24 a of the connecting body 24 through the upper and lower long holes 25 of the left and right movable clamps 19. Therefore, the left and right movable clamps 19 can be attached to and detached from the left and right clamping levers 18 and exchanged, and can be moved and adjusted in the longitudinal direction X and the vertical direction Z within the range of the long holes 25.
[0027]
In the left and right auxiliary clamps 20, a fastening member 28 (bolt) is screwed to the connecting body 24 between the left and right holding levers 18 and the left and right movable clamps 19, and the distal end portion of the fastening member 28 is pressed. A body 29 is supported so as to be rotatable about an axis 28a of the fastening member 28. Therefore, the left and right pressing bodies 29 can be moved and adjusted in the direction of the axis 28 a of the fastening member 28 with respect to the connecting body 24 of the left and right holding levers 18.
[0028]
The rail clamping portion 21 is provided so as to extend in the left-right direction Y between the left and right fixed clamps 17, the left and right movable clamps 19, and the left and right auxiliary clamps 20, and a rail 30 is installed in the rail clamping portion 21. The The rail 30 includes a pedestal 31, a support column 32 extending upward from the pedestal 31, and a head 33 provided at the upper end of the support column 32.
[0029]
Furthermore, the rail clamping mechanism 4 includes a screw operation mechanism 34 attached between the left and right fixed frames 16 and the left and right clamping levers 18. The screw operation mechanism 34 includes a support shaft 35 having a male screw portion 36 as a feed screw portion, an operation cylinder 37 having a female screw portion 38 as a feed screw portion, and a handle 39. A connecting shaft 40 (connecting portion) is supported between the left and right fixed frames 16 so as to be rotatable about an axis 40a, and the support shaft 35 is inserted into the connecting shaft 40 so as to be centered on the axis 40a. And can be rotated together with the connecting shaft 40. A connecting shaft 41 (connecting portion) is supported between the left and right holding levers 18 slightly below the left and right rotating support portions 23 so as to be rotatable about an axis 41a, and the operation cylinder 37 is connected to the connecting shaft. It can be inserted into 41 and rotated together with this connecting shaft 41 around its axis 41a. The male thread portion 36 of the support shaft 35 is screwed into the female thread portion 38 of the operation cylinder 37. The handle 39 is connected to the operation cylinder 37. When the handle 39 is rotated, the operation cylinder 37 is rotated around the shaft center 35 a of the support shaft 35 with respect to the connecting shaft 41, and the female screw portion 38 of the operation cylinder 37 is relative to the male screw portion 36 of the support shaft 35. The operation cylinder 37 rotates and moves together with the handle 39 and the connecting shaft 41 in the direction of the axis 35a with respect to the support shaft 35. As the operation cylinder 37 moves, the left and right clamping levers 18 rotate with the handle 39 and the connecting shaft 41 about the axis 23 a of the rotation support portion 23 with respect to the left and right fixed frames 16. By the rotation of the left and right clamping levers 18, the left and right movable clamps 19 and the left and right auxiliary clamps 20 are also rotated around the axis 23 a of the rotation support portion 23 to approach the left and right fixed clamps 17. Separate.
[0030]
<Usage example of the above rail punching machine>
The existing rail tensioner 42 (jig) schematically shown by an imaginary line in FIG. 8 gives tension to the rail 30 in consideration of a temperature difference from the summer when replacing the rail in the winter. The tension rods 42a are arranged on both sides in the direction orthogonal to the extending direction.
[0031]
When a hole for connecting with a sleeper is drilled in the rail 30 set in this way, first, as shown in FIG. 4, the left and right clamping levers 18 are rotated by the handle 39 in the rail clamping mechanism 4 and are not clamped. In the state Q, the rail 30 is inserted into the rail holding portion 21 between the left and right movable clamps 19 and the left and right both fixed clamps 17. Next, as shown in FIG. 3, the left and right clamping levers 18 are rotated by the handle 39 to be in the clamped state P, and between the left and right movable clamps 19 and the left and right both fixed clamps 17, The head 33 is clamped. In the clamped state P, the rail 30 is pressed by the left and right movable clamps 19 and the left and right fixed clamps 17 in the clamping direction (front-rear direction X) along the rotation center line 12a of the cutter attaching / detaching portion 12, and the rail punching machine 30 is positioned. In that case, usually, the left and right auxiliary clamps 20 are slightly separated from the support column 32 of the rail 30. Thereafter, when the cutter support mechanism 3 is reciprocated in the front-rear direction X together with the movable base 6 of the support base 2 and the drive source 1 by the operation mechanism 8, the punching cutter 15 of the cutter support mechanism 3 is moved to the rail 30. The support 32 is perforated. In this clamped state P, the movable clamp 19 is exchanged or moved and adjusted while the rail 30 is temporarily fastened between the left and right auxiliary clamps 20 and the left and right fixed clamps 17.
[0032]
[Second Embodiment]
Next, a rail drilling machine according to a second embodiment of the present invention will be described with reference to FIGS. 6 to 7 with a focus on differences from the first embodiment.
[0033]
In the second embodiment, the screw operation mechanism 34 of the first embodiment is changed. The screw operation mechanism 34 of the second embodiment includes an operation shaft 43 having a male screw portion 44 as a feed screw portion, a connecting cylinder 45 (connecting portion) having a female screw portion 46 as a feed screw portion, and a handle 47. ing. The connecting cylinder 45 is supported between the left and right fixed frames 16 so as to be rotatable about an axis 45a. A connecting shaft 48 (connecting portion) is supported between the left and right sandwiching levers 18 slightly below the left and right rotating support portions 23 so as to be rotatable about an axis 48a, and the operation shaft 43 is an axis thereof. The shaft 43a is pivotally inserted into the connecting shaft 48 and can rotate with the connecting shaft 48 about the shaft center 48a. The male screw portion 44 of the operation shaft 43 is screwed into the female screw portion 46 of the connecting cylinder 45. The handle 47 is connected to the operation shaft 43. When the handle 47 is rotated, the operation shaft 43 is rotated with respect to the connecting shaft 48 around the axis 43a, and the male screw portion 44 of the operating shaft 43 is rotated relative to the female screw portion 46 of the connecting tube 45. The lever operating shaft 43 moves together with the handle 47 and the connecting shaft 48 in the direction of the axis 43 a of the operating shaft 43 with respect to the connecting cylinder 45. As the operating shaft 43 moves, the left and right clamping levers 18 rotate with the handle 47 and the connecting shaft 48 about the axis 23 a of the rotation support portion 23 with respect to the left and right fixed frames 16. By the rotation of the left and right clamping levers 18, the left and right movable clamps 19 and the left and right auxiliary clamps 20 are also rotated around the axis 23 a of the rotation support portion 23 to approach the left and right fixed clamps 17. Separate.
[Brief description of the drawings]
FIG. 1 is a front view showing a rail punching machine according to a first embodiment.
FIG. 2 is a plan view showing the rail punching machine according to the first embodiment.
FIG. 3 is a partially broken front view showing a rail clamp state in the rail clamping mechanism of the rail punching machine according to the first embodiment.
FIG. 4 is a partially cutaway front view showing the unclamped state of the rail in FIG. 3;
FIG. 5 is a partial cross-sectional view showing a rail clamp state in the rail clamping mechanism of the rail drilling machine according to the first embodiment.
FIG. 6 is a partially broken front view showing a rail clamp state in a rail clamping mechanism of a rail drilling machine according to a second embodiment.
FIG. 7 is a partially broken front view showing the unclamped state of the rail in FIG.
FIG. 8 is a plan view showing an example of use of the rail punching machine according to the first embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Drive source, 2 ... Support stand, 3 ... Cutter support mechanism, 4 ... Rail clamping mechanism, 12 ... Cutter attaching / detaching part, 12a ... Rotation center line, 14a ... Mouth part, 15 ... Perforation cutter, 16 ... Fixed frame, 17 DESCRIPTION OF SYMBOLS ... Fixed clamp, 18 ... Clamping lever, 19 ... Movable clamp, 20 ... Auxiliary clamp, 21 ... Rail clamping part, 23 ... Rotation support part, 30 ... Rail, 31 ... Base part, 32 ... Post part, 33 ... Head 34 ... Screw operating mechanism, 35 ... support shaft, 35a ... axis, 36 ... male screw part (feed screw part), 37 ... operation cylinder, 38 ... female screw part (feed screw part), 39 ... handle, 40 ... connection shaft (Connecting portion), 41 ... connecting shaft (connecting portion), 43 ... operating shaft, 43a ... axial center, 44 ... male screw portion (feed screw portion), 45 ... connecting cylinder (connecting portion), 46 ... female screw portion (feed screw) Part), 47 ... handle, 48 ... connecting shaft (connecting part), ... clamped state, X ... front-rear direction (lateral direction, the clamping direction), Z ... vertically.

Claims (3)

A drive source, a support base on which the drive source is placed, a cutter support mechanism having a cutter attachment / detachment portion that rotates in conjunction with an output transmission mechanism of the drive source, and a rail clamping mechanism that positions the rails during drilling Rail punching machine,
The cutter support mechanism is disposed with the rotation center line of the cutter attachment / detachment portion in the horizontal direction, and the rail clamping mechanism disposed facing the mouth of the cutter attachment / detachment portion of the cutter support mechanism is attached to the support base. a fixed frame, a fixed clamp provided on the fixed frame, and the clamping lever pivotally supported by the pivot support portion relative to the fixed frame and arranged to be in and movably adjusted detachably against this clamping lever A movable clamp, a rail clamping portion provided between the fixed clamp and the movable clamp, and a relative movement of the feed screw portion in accordance with the operation of the handle rotate the clamping lever with respect to the fixed frame to move the fixed clamp. A screw operating mechanism for approaching and separating the clamp, and the base and head of the rail installed in the rail clamping portion are connected to the fixed clamp and the movable clamp. In a clamp while sandwiched in press contact to the clamp direction along the rotation center line of the cutter detachable sections, by a cutter mounted on the cutter mounting part piercing the struts between the base part and the head of the rail,
In addition to the movable clamp that clamps the rail platform and head between the fixed clamp and the clamp lever, the clamp lever moves closer to and away from the fixed clamp as the clamp lever rotates. An auxiliary clamp capable of press-contacting a support portion of the rail is attached, and the auxiliary clamp is supported so as to be movable and adjustable along the clamping direction with respect to the holding lever in the clamped state. .   In the screw operation mechanism, a support shaft having a male screw portion as the feed screw portion is attached to the connecting portion supported by the fixed frame, and the feed screw portion to which the male screw portion of the support shaft is screwed is used. An operating cylinder having a female thread portion is inserted into the connecting portion supported by the holding lever so as to be able to rotate about the axis of the support shaft, and the operating cylinder is handled with respect to the connecting portion of the holding lever. , The internal thread portion of the operation cylinder moves in the axial direction of the support shaft with respect to the external thread portion of the support shaft, and the operation tube moves together with the connecting portion of the clamping lever as the internal thread portion moves. The rail punching machine according to claim 1, wherein the clamping lever is moved and rotated with respect to the fixed frame.   In the screw operation mechanism, a female screw portion as the feed screw portion is provided in the connection portion supported by the fixed frame, and the operation shaft is rotated around the axis of the operation shaft with respect to the connection portion supported by the clamping lever. By inserting the male screw portion as the feed screw portion provided on the operation shaft into the female screw portion and rotating the operation shaft by the handle with respect to the connecting portion of the holding lever. The male screw portion of the operating shaft rotates relative to the female screw portion of the connecting portion of the fixed frame and moves in the axial direction of the operating shaft. As the male screw portion moves, the operating shaft moves with the connecting portion of the clamping lever. The rail punching machine according to claim 1, wherein the holding lever rotates with respect to the fixed frame.

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