JP2021059285A - Table for railway vehicle - Google Patents

Abstract

To provide a table for a railway vehicle capable of easily moving a table body between a use position and a non-use position.SOLUTION: A table for a railway vehicle includes: a table body; a base bracket mounted on a wall surface of a cabin or a seat in a cabin; an arm that supports the table body and is rotatably connected to the base bracket between a use position at which the table body is in a use state and a non-use position at which the table body is in a non-use state; a cam that is connected to the base bracket so as not to be rotated and has a cam surface formed around a shaft around which the arm is rotated; a cam follower that is provided on the arm to slide over the cam surface together with the rotation of the arm; and a pressing mechanism provided on the arm to press the cam follower against the cam surface. When the arm is located at a prescribed position between the use position and the non-use position, the arm is moved to the non-use position due to the reaction force that is received by the cam follower from the cam surface.SELECTED DRAWING: Figure 3

Description

The present invention relates to a railcar table.

Patent Document 1 discloses a table for railroad vehicles. This table has a fixed mounting member fixed to the wall surface of a railway vehicle and a table body rotatably supported by the fixed mounting member, and when the table body is used, it is used in a horizontal position. If not, it is held in the vertical position.

Japanese Unexamined Patent Publication No. 2016-13736

In a railroad vehicle table in which such a table body can be rotated between a horizontal position and a vertical position, when rotating the table body from the horizontal position to the vertical position, the user hands until the table body reaches the vertical position. It was necessary to attach it, and it took time and effort to rotate the table body.

Therefore, the present invention relates to a railroad vehicle table that can rotate between a predetermined use position when the table body is used and a predetermined non-use position when it is not used, between the use position and the non-use position. It is an object of the present invention to provide a configuration in which the table body can be easily moved.

In order to solve the above problems, the railroad vehicle table according to one aspect of the present invention is a railroad vehicle table arranged in the passenger compartment of the railroad vehicle, and the table body and the wall surface of the passenger compartment or the passenger compartment The base bracket attached to the seat and the arm that supports the table body between the used position where the table body is in the used state and the unused position where the table body is not used. A cam that is rotatably connected to the base bracket, a cam that is non-rotatably connected to the base bracket and has a cam surface formed around an axis on which the arm rotates, and a cam provided on the arm. The arm is provided with a cam follower that slides on the cam surface as the arm rotates, and a pressing mechanism that is provided on the arm and presses the cam follower against the cam surface. When it is in a predetermined position between the cam follower and the unused position, the cam follower moves to the unused position by the reaction force received from the cam surface.

According to the above configuration, when the arm is in a predetermined position between the used position and the unused position, the arm moves to the unused position by the reaction force received by the cam follower from the cam surface of the cam. Therefore, the table body can be easily moved between the used position and the non-used position.

According to the present invention, in a railroad vehicle table that can rotate between a predetermined use position when the table body is used and a predetermined non-use position when the table body is not used, the use position and the non-use position It is possible to provide a configuration in which the table body can be easily moved between.

It is a perspective view which saw from the rear of the seat which attached the table for the railroad vehicle which concerns on embodiment. It is a figure which shows the rotation operation of the railroad vehicle table shown in FIG. It is a perspective view of the railroad vehicle table shown in FIG. 1 in a state where the table body and the like are removed. It is a side sectional view of the railroad vehicle table shown in FIG. It is an exploded perspective view of the table for a railroad vehicle shown in FIG. It is a side view for demonstrating the movement of a cam follower along a cam surface. It is a figure which shows the state which the cam follower got over the rotation restricting part. It is a perspective view of a fixed shaft. It is a top view of the cam in the state where the fixed shaft is inserted into the insertion hole. It is a figure which shows the state which the cam is fixed to the fixed shaft at a certain angle, (A) is the XA arrow view of FIG. 9, and (B) is the XB arrow view of FIG. It is a figure which shows the state which the cam is fixed to the fixed shaft at the angle different from FIG. 10, (A) is the XA arrow view of FIG. 9, and (B) is the XB arrow view of FIG.

Hereinafter, embodiments will be described with reference to the drawings. The concept of direction in the following description is based on the direction seen by passengers seated in the passenger compartments of railway vehicles.

FIG. 1 is a perspective view of the seat 100 to which the railroad vehicle table 1 according to the present embodiment is attached, as viewed from the rear. Seat 100 is arranged in the passenger cabin of the railway vehicle. The seat 100 allows two passengers to sit side by side. Two railroad vehicle tables 1 having the same configuration are attached to the back surface 101 of the seat 100 so as to be arranged in the left-right direction. The railroad vehicle table 1 may be attached to, for example, the wall surface of the passenger cabin instead of being attached to the seat 100 of the passenger cabin.

Each railcar table 1 includes one table body 2, two base brackets 10 (see FIGS. 4 and 5), and two arms 30. The table body 2 is formed in a substantially plate shape, and at least one main surface is substantially flat so that passengers can place a notebook computer, drinks, or the like. The other main surface of the table body 2 is fixed and supported by the two arms 30. The two base brackets 10 are fixed to the back surface 101 of the seat 100 at predetermined intervals in the left-right direction, and two arms 30 are rotatably attached to the two base brackets 10. .. The base bracket 10 is covered with a base cover 12 and two side cover 13.

FIG. 2 is a diagram showing a rotating operation of the railroad vehicle table 1. Each arm 30 is rotatable around an axis (more specifically, a fixed shaft 20 described later) extending in the left-right direction with respect to each base bracket 10. In each arm 30, the predetermined use position P1 in which the table body 2 is in the used state (that is, the table body 2 is in the horizontal state) and the table body 2 in the non-used state (that is, the table body 2 and the back surface 101 are substantially abbreviated to each other). It is rotatable with respect to each base bracket 10 from a predetermined unused position P2 which is in a parallel state). In the present embodiment, when the arm 30 is in the used position P1, the arm 30 extends completely or substantially horizontally rearward from the base bracket 10, and when the arm 30 is in the unused position P2, above the base bracket 10. And extends completely or approximately perpendicular to the horizontal plane.

The railroad vehicle table 1 of the present embodiment automatically uses the arm 30 when the passenger releases the railroad vehicle table 1 while the passenger manually rotates the railroad vehicle table 1. It is provided with an arm moving mechanism for moving to P1 or an unused position P2. More specifically, the arm moving mechanism moves the arm 30 to the used position P1 when the arm 30 is located closer to the used position P1 than a predetermined position between the used position P1 and the non-used position P2 in the rotation range. When the arm 30 is located closer to the unused position P2 than the predetermined position in the rotation range, the arm 30 is moved to the unused position P2.

FIG. 3 is a perspective view of the railroad vehicle table 1 in a state where the table body 2 and the like are excluded. FIG. 4 is a side sectional view of the railroad vehicle table 1. FIG. 5 is an exploded perspective view of the railroad vehicle table 1. In addition, in FIGS. 3 to 5, the state where the arm 30 is in the use position P1 is shown. In the following description, the direction will be described with reference to the state in which the arm 30 is in the use position P1, that is, the state in which the arm 30 extends rearward with respect to the base bracket 10.

In the railroad vehicle table 1, the arm 30 is formed to be hollow. Specifically, as shown in FIGS. 3 and 4, the arm 30 has an arm casing 31 having an opening 31a and a top cover 32 (see FIG. 4). The arm casing 31 has two side surface portions 31b and 31c, a front surface portion 31d and a bottom surface portion 31e. The two side surface portions 31b and 31c are parallel to each other and face each other in the left-right direction. The two side surface portions 31b and 31c have a substantially triangular shape when viewed from the side surface, and when the arm 30 is in the use position P1, the front end edge extending upward and the upper end extending horizontally rearward from the upper end of the front end edge. Includes edges and a lower edge that extends from the lower end of the front edge to the trailing edge of the upper edge with a gentle slope with respect to the horizontal plane. The front surface portion 31d connects the front end edges of the two side surface portions 31b and 31c, and the bottom surface portion 31e connects the lower end edges of the two side surface portions 31b and 31c.

The opening 31a is surrounded by the upper end edges of the two side surface portions 31b and 31c, the upper end edge of the front surface portion 31d, and the rear end edge of the bottom surface portion 31e, and opens upward while being at the use position P1. As shown in FIG. 4, the opening 31a is closed by the top cover 32 and the table body 2.

As shown in FIG. 5, the base bracket 10 has two base plate portions 10a facing the back surface 101 and two protruding base plate portions 10a rearward and perpendicular to the base plate portion 10a from both ends in the left-right direction. It has support plate portions 10b and 10c. The two support plate portions 10b and 10c face each other in the left-right direction. Two through holes (not shown) are formed in the base plate portion 10a, and the base plate portion 10a is fixed to the seat 100 by bolts 10d inserted through the through holes. The base plate portion 10a and the support plate portions 10b and 10c are covered with the base cover 12 and the two side cover 13, but these covers 12 and 13 are omitted in FIG.

The base bracket 10 is provided with a fixed shaft 20 that is non-rotatable with respect to the base bracket 10. Specifically, the two support plate portions 10b and 10c are formed with insertion holes 10e and 10f through which the fixed shaft 20 is inserted in the left-right direction, respectively. Further, the fixed shaft 20 has a head 21, a detent portion 22, a shaft main body portion 23, and a male screw portion 24 in this order from the base end portion to the tip end portion, and these have a size, shape, and shaft, respectively. The length of the direction is different. The head 21, the shaft body 23, and the male screw portion 24 have substantially circular cross-sectional views in which the diameters decrease in this order. The detent portion 22 has a substantially square cross-sectional view.

One of the insertion holes 10e and 10f has a size that allows the detent portion 22, the shaft body portion 23, and the male screw portion 24 to be inserted, and the head 21 cannot be inserted. The other insertion hole 10f has a size that allows the male screw portion 24 to be inserted and the shaft main body portion 23 cannot be inserted. Further, the insertion hole 10e has the same shape and size as the detent portion 22 when viewed from the side so that the detent portion 22 fits into the insertion hole 10e. That is, the fixed shaft 20 is inserted into the insertion holes 10e and 10f in this order from one side of the base bracket 10 in the left-right direction, and the detent portion 22 is fitted into the insertion holes 10e so that the fixed shaft 20 is inserted into the base bracket 10 with respect to the base bracket 10. It becomes impossible to rotate. The shape of the insertion hole 10e and the detent portion 22 does not have to be substantially square in cross section, and a shape that is not circular can be appropriately adopted.

Further, in a state where the detent portion 22 is fitted into the insertion hole 10e, the male screw portion 24, which is the tip end portion of the fixed shaft 20, protrudes from the insertion hole 10f to the other side in the left-right direction of the base bracket 10. By screwing the nut 25 into the protruding portion, the fixed shaft 20 cannot move in the left-right direction with respect to the base bracket 10.

Further, the arm 30 is rotatable around the fixed shaft 20, more specifically, around the shaft main body 23. The two side surface portions 31b, 31c of the arm 30 face each other in the left-right direction between the two support plate portions 10b, 10c of the base bracket 10, and the front portions of the side surface portions 31b, 31c (that is, the arm 30). Insertion holes 31f and 31g are formed in the base end side portion), respectively. By inserting the fixed shaft 20 into the insertion holes 31f and 31g, the arm 30 is rotatable around the fixed shaft 20.

The arm moving mechanism described above is built in the internal space of the arm 30. The arm moving mechanism includes a cam 40, a cam follower 50, and a pressing mechanism 60. That is, the cam 40, the cam follower 50, and the pressing mechanism 60 are housed in the internal space of the arm 30.

The cam 40 is non-rotatably connected to the base bracket 10. More specifically, the cam 40 has an insertion hole 41 penetrating in the left-right direction, and the fixed shaft 20 is inserted through the insertion hole 41. Further, the first set screw 81 and the second set screw 82 are screwed into the cam 40 from the direction orthogonal to the extending direction of the insertion hole 41, and the first set screw 81 and the second set screw 82 are attached to the fixed shaft 20. The cam 40 is fixed to the fixed shaft 20 by abutting. The method of fixing the cam 40 to the fixed shaft 20 will be described in detail later.

The cam 40 has a cam surface 42 formed around an axis on which the arm 30 rotates. The cam follower 50 slides on the cam surface 42 with the rotation of the arm 30 when the arm 30 rotates between the used position P1 and the non-used position P2 in the rotation range.

The cam follower 50 has a sliding surface 51 that slides on the cam surface 42. The sliding surface 51 is a flat surface perpendicular to the extending direction of the arm 30. The cam follower 50 is arranged between a pair of first guide portions 33 that face each other in the left-right direction provided on the arm 30.

The pair of first guide portions 33 guide the cam follower 50 in the extending direction of the arm 30 while restricting the movement of the cam follower 50 in the direction orthogonal to the extending direction of the arm 30. Specifically, protrusions 52 protruding in the left-right direction are formed on both ends of the cam follower 50 in the left-right direction. On the other hand, the pair of first guide portions 33 are provided on the surfaces of the two side surface portions 31b and 31c of the arm 30 facing each other. The pair of first guide portions 33 have guide grooves 33a extending in the extending direction of the arm 30. The protrusion 52 of the cam follower 50 is slidably fitted in the guide groove 33a in the extending direction of the arm 30.

The pressing mechanism 60 presses the cam follower 50 against the cam surface 42. The pressing mechanism 60 has a compression coil spring 61 and a spring receiving member 62. The center line of the compression coil spring 61 is parallel to the extending direction of the arm 30. One end of the compression coil spring 61 is in contact with the cam follower 50. Specifically, one end of the compression coil spring 61 comes into contact with the contact surface 53 on the cam follower 50 opposite to the sliding surface 51. The contact surface 53 is provided with a columnar convex portion 54 having a diameter equal to or smaller than the inner diameter of the compression coil spring 61. By locating the convex portion 54 inside the compression coil spring 61, the displacement of one end of the compression coil spring 61 in the direction orthogonal to the extending direction of the arm 30 is suppressed.

The other end of the compression coil spring 61 is in contact with the spring receiving member 62 provided on the arm 30. Specifically, the spring receiving member 62 has a contact surface 63 to which the other end of the compression coil spring 61 abuts, and the contact surface 63 is a circle having the same or smaller diameter as the inner diameter of the compression coil spring 61. A columnar convex portion 64 is provided. By locating the convex portion 64 inside the compression coil spring 61, the displacement of the other end portion of the compression coil spring 61 in the direction orthogonal to the extending direction of the arm 30 is suppressed.

The spring receiving member 62 is arranged between a pair of second guide portions 34 that are provided on the arm 30 and face each other in the left-right direction. The pair of second guide portions 34 guide the spring receiving member 62 in the extending direction of the arm 30 while restricting the movement of the spring receiving member 62 in the direction orthogonal to the extending direction of the arm 30. Specifically, protrusions 65 projecting in the left-right direction are formed at both ends of the spring receiving member 62 in the left-right direction. On the other hand, the pair of second guide portions 34 are provided on the surfaces of the two side surface portions 31b and 31c of the arm 30, which face each other. The pair of second guide portions 34 have guide grooves 34a extending in the extending direction of the arm 30. The protrusion 65 of the spring receiving member 62 is slidably fitted in the guide groove 34a in the extending direction of the arm 30.

The position of the spring receiving member 62 with respect to the arm 30 in the extending direction of the center line of the compression coil spring 61 is adjusted by the position adjusting mechanism 70 provided on the arm 30. The position adjusting mechanism 70 has a nut 71, a nut support member 72 that supports the nut 71, and a bolt 73 that is screwed into the female screw hole of the nut 71.

The nut support member 72 is formed by vertically bending a thin metal plate, and has a substantially L-shape when viewed from the side. The nut support member 72 has a first plate portion 72a extending in the extending direction of the arm 30, and a second plate portion 72b hanging from the proximal end side edge of the arm 30 of the first plate portion 72a. The nut support member 72 is fixed to the arm 30 by a fastening bolt 72c penetrating the first plate portion 72a.

The second plate portion 72b faces the spring receiving member 62 in the extending direction of the arm 30. A through hole 72d through which the bolt 73 can be inserted is formed in the second plate portion 72b. The nut 71 is arranged on the surface of the second plate portion 72b facing the spring receiving member 62 so that the center line thereof coincides with the center of the through hole 72d, and is joined to the second plate portion 72b. A bolt 73 is screwed into the nut 71. That is, the second plate portion 72b and the nut 71 are formed with female screw holes penetrating in the axial direction of the compression coil spring 61 on the side opposite to the compression coil spring 61 with respect to the spring receiving member 62 in the arm 30. It constitutes the "bolt mounting wall" of the present invention.

The shaft end portion 73a of the bolt 73 is in contact with the spring receiving member 62. More specifically, a recess 66 having a cylindrical concave surface is provided on the surface of the spring receiving member 62 opposite to the contact surface 63. The shaft end portion 73a of the bolt 73 has entered the recess 66 of the spring receiving member 62 and is in contact with the concave surface of the recess 66. As a result, it is possible to prevent the posture of the spring receiving member 62 from tilting with respect to the extending direction of the bolt 73.

The spring receiving member 62 receives a force from the compression coil spring 61 toward the tip side in the extending direction of the arm 30, and the bolt 73 is moved from the side opposite to the compression coil spring 61 to the tip side in the extending direction of the arm 30. Supports the force of action. In the position adjusting mechanism 70, by turning the bolt 73, the shaft end portion 73a of the bolt 73 is advanced and retracted to adjust the position of the spring receiving member 62 in the extending direction of the arm 30.

FIG. 6 is a side view for explaining the movement of the cam follower 50 along the cam surface 42. In FIG. 6, the cam follower 50 and the compression coil spring 61 when the arm 30 is in the used position P1 are shown by a solid line, and the cam follower 50 and the compression coil spring 61 when the arm 30 is in the unused position P2 are shown by a chain double-dashed line. ..

The cam surface 42 is a cam when the arm 30 is located closer to the used position P1 than a predetermined position (hereinafter, referred to as "boundary position") between the used position P1 and the non-used position P2 in the rotation range. The arm 30 is formed to move to the use position P1 by the reaction force (drag) received from the surface 42 by the cam follower 50. Further, when the arm 30 is located on the unused position P2 side from the boundary position in the rotation range of the cam surface 42, the arm 30 is moved to the unused position P2 by the reaction force received from the cam surface 42 by the cam follower 50. It is formed in. That is, when the arm 30 is at a predetermined position between the used position P1 and the unused position P2 (in this example, the unused position P2 side from the boundary position in the rotation range of the arm 30), the arm 30 is from the cam surface 42. The reaction force received by the cam follower 50 moves to the unused position P2.

Specifically, the cam surface 42 includes a first holding surface 43, a second holding surface 44, and a moving surface 45. The first holding surface 43 is a surface that comes into contact with the cam follower 50 when the arm 30 is in the use position P1. In the present embodiment, the first holding surface 43 is a flat surface that is substantially parallel to a vertical straight line and parallel to the axis on which the arm 30 rotates. The second holding surface 44 is a surface that comes into contact with the cam follower 50 when the arm 30 is in the unused position P2. In the present embodiment, the second holding surface 44 is a flat surface parallel to a substantially horizontal straight line and parallel to the axis on which the arm 30 rotates.

The moving surface 45 is located between the first holding surface 43 and the second holding surface 44, and is a surface continuous with the first holding surface 43 and the second holding surface 44. The moving surface 45 is smoothly curved from the upper end edge of the first holding surface 43 to the rear end edge of the second holding surface 44. That is, the inclination of the moving surface 45 with respect to the horizontal plane gradually decreases from the upper end edge of the first holding surface 43 to the rear end edge of the second holding surface 44.

The distance of the arm 30 from the rotating axis C on the cam surface 42 is maximum at a predetermined position 45a on the moving surface 45 located at a predetermined angle from the axis C. This position will be referred to as the "maximum distance position 45a". The distance from the axis C gradually decreases from the maximum distance position 45a to the upper end edge of the first holding surface 43 and the rear end edge of the second holding surface 44.

In other words, the compressive force of the compression coil spring 61 is maximized when the contact position with the cam follower 50 on the cam surface 42 is at the maximum distance position 45a. Then, as the contact position with the cam follower 50 on the cam surface 42 goes below the maximum distance position 45a, the amount of compression of the spring of the compression coil spring 61 decreases. Further, as the contact position with the cam follower 50 on the cam surface 42 goes above the maximum distance position 45a, the amount of compression of the spring of the compression coil spring 61 decreases.

When the contact position with the cam follower 50 on the cam surface 42 is at the maximum distance position 45a, the arm 30 is not always at the boundary position described above. For example, at the above-mentioned boundary position, the arm 30 is moved to the unused position P2 by the force of rotating the arm 30 to the used position P1 by gravity of the table body 2 or the arm 30, and the reaction force received by the cam follower 50 from the cam surface 42. It may be the position of the arm 30 when the rotating force is balanced.

When the cam follower 50 comes into contact with the first holding surface 43, the reaction force received by the cam follower 50 from the first holding surface 43 does not act in the direction of rotating the arm 30, and the arm 30 is held at the use position P1. .. When the cam follower 50 comes into contact with the second holding surface 44, the reaction force received by the cam follower 50 from the second holding surface 44 does not act in the direction of rotating the arm 30, and the arm 30 is held at the unused position P2. To.

When the cam follower 50 comes into contact with the first holding surface 43, a force acts on the arm 30 in the downward rotation direction due to the weight of the arm 30, but the arm 30 is a rotation restricting portion protruding from the cam surface 42. The 46 regulates the downward rotation.

The rotation restricting unit 46 supports the cam follower when the arm 30 is in the used position from below, and restricts the arm 30 in the used position P1 from rotating downward. The rotation restricting portion 46 is located below the first holding surface 43 and projects rearward.

FIG. 7 is a diagram showing a state in which the cam follower 50 has passed over the rotation restricting portion 46. The rotation restricting portion 46 is formed so that the cam follower 50 can get over the arm 30 in the use position P1 when a load of a predetermined value or more is applied downward. In other words, the length of the rotation restricting portion 46 protruding from the cam surface 42 (that is, the first holding surface 43) and the side-viewed shape are the arm 30, the table body 2, and the table body in the state of being in the use position P1. It is designed so that it can support the load of an object within the permissible range placed on No. 2 and can release the force by rotating the arm 30 downward when a load exceeding a certain level is applied. There is.

The railcar table 1 is provided with an angle adjusting mechanism 80 for adjusting the angle of the cam 40 around the axis on which the arm 30 rotates with respect to the base bracket 10, and the inclination of the table body 2 during use can be finely adjusted. .. Hereinafter, the angle adjusting mechanism 80 will be described with reference to FIGS. 8 to 11.

FIG. 8 is a perspective view of the fixed shaft 20. A first flat surface portion 26 and a second flat surface portion 27 are formed on the shaft main body portion 23 of the fixed shaft 20. Both the first plane portion 26 and the second plane portion 27 are planes parallel to the extending direction of the fixed shaft 20. The first flat surface portion 26 and the second flat surface portion 27 are arranged at intervals in the extending direction of the fixed shaft 20. The first flat surface portion 26 and the second flat surface portion 27 are formed so as to face diagonally forward in a state where the fixed shaft 20 is fixed to the base bracket 10, but the first flat surface portion 26 and the second flat surface portion 26 are formed. It is not parallel to 27 and has a slightly different angle of inclination with respect to the horizontal plane.

FIG. 9 is a plan view of the cam 40 in a state where the fixed shaft 20 is inserted into the insertion hole 41 of the cam 40. The cam 40 has a first screw hole 47 and a second screw hole 48. The first screw hole 47 and the second screw hole 48 are formed at intervals in the left-right direction. The first screw hole 47 and the second screw hole 48 are parallel to each other and both extend in a direction orthogonal to the axial direction of the fixed shaft 20. The first screw hole 47 and the second screw hole 48 extend the cam 40 diagonally from the front and the upper side to the rear side and the lower side, and communicate the insertion hole 41 with the outside. The first set screw 81 and the second set screw 82 are screwed into the first screw hole 47 and the second screw hole 48, respectively. The first set screw 81 screwed into the first screw hole 47 abuts on the first flat surface portion 26, and the second set screw 82 screwed into the second screw hole 48 abuts on the second flat surface portion 27.

The angle adjusting mechanism 80 described above is a first set screw that is screwed into the first flat surface portion 26 and the second flat surface portion 27 formed on the fixed shaft 20 and the first screw hole 47 and the second screw hole 48 of the cam 40, respectively. It is composed of 81 and a second set screw 82. That is, the angles at which the first flat surface portion 26 and the second flat surface portion 27 are inclined with respect to the horizontal plane are slightly different, and the first screw hole 47 and the second screw hole 48 extend in parallel with each other. Therefore, the cam 40 can be fixed to the fixed shaft 20 by finely adjusting the angle around the axis C.

For example, FIG. 10 is a diagram showing a state in which the cam 40 is fixed to the fixed shaft 20 at a certain angle. Specifically, in FIGS. 10 (A) and 10 (B), FIG. 9 shows a state in which the first flat surface portion 26 is perpendicular to the extending direction of the first screw hole 47 and the second screw hole 48, respectively. XA and XB arrows are shown. As shown in FIG. 10A, since the first flat surface portion 26 is perpendicular to the extending direction of the first screw hole 47, the entire screw tip of the first set screw 81 is pressed against the first flat surface portion 26. Be done. On the other hand, as shown in FIG. 10B, since the second flat surface portion 27 is not perpendicular to the extending direction of the second screw hole 48, a part of the screw tip of the second set screw 82 is a second flat surface portion. It is pressed against 27.

FIG. 11 is a diagram showing a state in which the cam 40 is fixed to the fixed shaft 20 at an angle different from that of FIG. Specifically, FIGS. 11A and 11B show FIG. 9 in a state in which the second plane portion 27 is perpendicular to the extending direction of the first screw hole 47 and the second screw hole 48, respectively. XA and XB arrows are shown. As shown in FIG. 11A, since the first flat surface portion 26 is not perpendicular to the extending direction of the first screw hole 47, a part of the screw tip of the first set screw 81 is formed on the first flat surface portion 26. Be pressed. On the other hand, as shown in FIG. 10B, since the second flat surface portion 27 is perpendicular to the extending direction of the second screw hole 48, the entire thread tip of the second set screw 82 is the second flat surface portion 27. Is pressed against.

In this way, the angle adjusting mechanism 80 allows the first flat surface portion 26 to be perpendicular to the extending direction of the first screw hole 47 and the second screw hole 48, and the first screw hole 47 and the second screw hole 48. The cam 40 can be adjusted around the axis C and fixed to the fixed shaft 20 as long as the second plane portion 27 is perpendicular to the extending direction of the cam 40.

As described above, according to the railroad vehicle table 1 according to the present embodiment, when the arm 30 is at a predetermined position between the used position P1 and the non-used position P2, the cam surface 42 of the cam 40 The reaction force received by the cam follower 50 moves to the unused position P2. Therefore, the table body 2 can be easily moved between the used position P1 and the non-used position P2.

Further, in the present embodiment, the arm 30 is formed to be hollow, and the cam 40, the cam follower 50, and the pressing mechanism 60 are housed in the internal space of the arm 30. Therefore, since the mechanism for moving the arm 30 to the used position P1 and the non-used position P2 is housed in the internal space of the arm 30, the entire configuration of the railroad vehicle table 1 can be made compact.

Further, in the present embodiment, the rotation restricting portion 46 protruding from the cam surface 42 supports the cam follower 50 when the arm 30 is in the use position P1 from below, and the arm 30 in the state of being in the use position P1 is downward. It regulates the rotation to. Therefore, a structure for holding the arm 30 at the use position P1 can be realized with a simple configuration.

Further, in the present embodiment, the rotation restricting unit 46 is formed so that the cam follower 50 can get over the arm 30 in the state of being in use position P1 when a load of a predetermined value or more is applied downward. Therefore, when a high load is applied to the arm 30, it is possible to prevent the parts of the railroad vehicle table 1 from being damaged by releasing the load.

Further, in the present embodiment, since the angle adjusting mechanism 80 adjusts the angle of the cam 40 around the axis around which the arm 30 rotates with respect to the base bracket 10, the table body 2 is in the used position P1 so as to be horizontal. The angle of the arm 30 can be adjusted.

Further, in the present embodiment, the angle adjusting mechanism 80 has a first plane portion 26 formed on the fixed shaft 20 parallel to the axial direction and a first plane portion 26 formed on the fixed shaft 20 with respect to a horizontal plane. A second flat surface portion 27 having a different angle and parallel to the axial direction, a first set screw 81 screwed into the cam 40 and abutting against the first flat surface portion 26, and a second flat surface portion 27 screwed into the cam 40 and hitting the second flat surface portion 27. It is configured to have a second set screw 82 in contact with the second set screw 82. Therefore, the angle of the arm 30 can be adjusted with a simple configuration.

Further, in the present embodiment, the position adjusting mechanism 70 adjusts the position of the spring receiving member 62 with respect to the arm 30 in the axial direction of the compression coil spring 61. Therefore, the position of the spring receiving member 62 that supports one end of the compression coil spring 61 can be adjusted in the axial direction of the compression coil spring 61. Therefore, the compressive force of the compression coil spring 61 that presses the cam follower 50 against the cam 40 can be adjusted.

Further, in the present embodiment, the position adjusting mechanism 70 has a nut 71, a nut support member 72 for supporting the nut 71, and a bolt 73 screwed into the female screw hole of the nut 71, and turns the bolt 73. The position of the spring receiving member 62 in the axial direction of the compression coil spring 61 in the extending direction of the arm 30 is adjusted by advancing and retreating the shaft end portion 73a. Therefore, the compression force of the compression coil spring 61 can be adjusted with a simple configuration.

The present invention is not limited to the above-described embodiment, and its configuration can be changed, added, or deleted.

For example, the shape of the cam surface 42 viewed from the side is not limited to that described in the above embodiment. For example, the first holding surface 43 and the second holding surface 44 do not have to be flat surfaces. Further, in the above embodiment, when the arm 30 is located closer to the used position P1 than the boundary position between the used position P1 and the non-used position P2 in the rotation range, the cam surface 42 is located from the cam surface 42 to the cam follower 50. The arm 30 is formed to move to the use position P1 by the reaction force received by the cam, but the present invention is not limited to this. For example, when the arm 30 is located closer to the used position P1 than the boundary position between the used position P1 and the non-used position P2 in the rotation range, the arm 30 is not a reaction force received from the cam surface 42 but a table. You may move to the use position P1 only by the gravity of the main body 2 and the arm 30. That is, the distance from the axis C may be constant or gradually increases from the contact position with the cam follower 50 on the moving surface 45 when the arm 30 is at the boundary position to the upper end edge of the first holding surface 43. You may.

Further, the arm 30 does not have to be formed hollow. The arm moving mechanism may be attached to the outside of the arm 30 instead of being housed in the internal space of the arm. The arm moving mechanism may be any one that moves the arm to the non-used position when the arm is in a predetermined position between the used position and the non-used position. The arm moving mechanism may be any one that moves the arm to the non-used position when the arm is in a predetermined position between the used position and the non-used position. In the above embodiment, the arm moving mechanism sets the arm 30 to the used position P1 when the arm 30 is located closer to the used position P1 than a predetermined position between the used position P1 and the non-used position P2 in the rotation range. When the arm 30 is moved and is located closer to the unused position P2 than the predetermined position in the rotation range, the arm 30 is moved to the unused position P2. It is not necessary to move the arm 30 to the used position P1 when the arm 30 is located closer to the used position P1 than the predetermined position between the used position P1 and the non-used position P2.

Further, in the above embodiment, the rotation restricting unit 46 is formed so that the cam follower 50 can overcome the arm 30 in the state of being in use position P1 when a load of a predetermined value or more is applied downward. The rotation restricting portion 46 may have a length that the cam follower 50 cannot overcome. Further, instead of the rotation restricting portion 46 protruding from the cam surface 42, the cam follower 50 when the arm 30 is in the use position P1 is supported from below, and the arm 30 in the use position P1 rotates downward. Another member may be provided on the arm 30 to regulate the movement.

Further, the configuration of the angle adjusting mechanism 80 is not limited to that described in the above embodiment. For example, in the angle adjusting mechanism 80 of the above embodiment, the angles at which the first plane portion 26 and the second plane portion 27 are inclined with respect to the horizontal plane are slightly different, and the first screw hole 47 and the second screw hole 48 are Although extending parallel to each other, the first plane portion 26 and the second plane portion 27 are formed by one or more planes parallel to each other, and the first screw hole 47 and the second screw hole 48 are parallel to each other. Instead, they may extend at different angles toward the fixed shaft 20. Further, the railroad vehicle table 1 does not have to be provided with the angle adjusting mechanism 80, and the cam 40 may be fastened to the fixed shaft 20 with bolts or the like.

Further, the configuration of the position adjusting mechanism 70 is not limited to that described in the above embodiment. Further, the railroad vehicle table 1 does not have to be provided with the position adjusting mechanism 70.

Further, the arm moving mechanism in the railroad vehicle table 1 does not have to include a part or all of the cam 40, the cam follower 50 and the pressing mechanism 60, and is different from the cam 40, the cam follower 50 and the pressing mechanism 60 in the arm 30. An arm moving mechanism including components may be built in. Even in this case, when the arm 30 is located closer to the non-used position P2 than the boundary position between the used position P1 and the non-used position P2 in the rotation range, the arm 30 is moved to the non-used position P2 by the arm moving mechanism. Move to. Therefore, the table body 2 can be easily moved between the used position P1 and the non-used position P2.

1: Railroad vehicle table 2: Table body 5q0: Cam follower 10: Base bracket 20: Fixed shaft 26: First flat surface 27: Second flat surface 30: Arm 40: Cam 42: Cam surface 46: Rotation control part 50 : Cam follower 60: Pressing mechanism 61: Compression coil spring 62: Spring receiving member 70: Position adjusting mechanism 71: Nut 72: Nut supporting member 73: Bolt 80: Angle adjusting mechanism 81: First set screw 82: Second set screw

Claims (9)

A railroad car table placed in the passenger cabin of a railroad car.
With the table body
With a base bracket attached to the wall of the cabin or the seat of the cabin,
An arm that supports the table body and is rotatably connected to the base bracket between a used position in which the table body is in a used state and an unused position in which the table body is in a non-used state. With the arm
A cam that is non-rotatably connected to the base bracket and has a cam surface formed around an axis on which the arm rotates.
A cam follower provided on the arm and sliding on the cam surface as the arm rotates.
A pressing mechanism provided on the arm and pressing the cam follower against the cam surface is provided.
A railroad vehicle table in which the arm moves to the non-use position by a reaction force received by the cam follower from the cam surface when the arm is in a predetermined position between the use position and the non-use position. The arm is hollow and has a hollow shape.
The railroad vehicle table according to claim 1, wherein the cam, the cam follower, and the pressing mechanism are housed in the internal space of the arm. The cam has a rotation restricting portion protruding from the cam surface.
The rotation restricting unit supports the cam follower when the arm is in the used position from below, and restricts the arm in the used position from rotating downward, according to claim 1 or The railroad vehicle table according to 2. The railway vehicle according to claim 3, wherein the rotation restricting portion is formed so that the cam follower can overcome the arm when a load of a predetermined value or more is applied downward to the arm in the used position. Table for. The railroad vehicle table according to claim 3 or 4, further comprising an angle adjusting mechanism for adjusting the angle of the cam around an axis on which the arm rotates with respect to the base bracket. The arm is rotatable around a fixed axis provided so as not to rotate with respect to the base bracket.
The cam has an insertion hole through which the fixed shaft is inserted.
The angle adjustment mechanism is
A first plane portion parallel to the axial direction formed on the fixed shaft and
A second plane portion parallel to the axial direction, which is formed at a position different from the first plane portion on the fixed shaft and has a different angle with respect to the horizontal plane from the first plane portion.
A first set screw that is screwed into the cam and comes into contact with the first flat surface portion,
The railroad vehicle table according to claim 5, further comprising a second set screw that is screwed into the cam and abuts on the second flat surface portion. The pressing mechanism has a compression coil spring whose axis extends in the extending direction of the arm.
One end of the compression coil spring is brought into contact with the spring receiving member provided on the arm.
The other end of the compression coil spring is in contact with the cam follower.
The railroad vehicle according to any one of claims 1 to 6, further comprising a position adjusting mechanism for adjusting the position of the spring receiving member with respect to the arm in the axial direction of the compression coil spring. Table for. The position adjusting mechanism is
A bolt mounting wall having a female screw hole formed in the arm on the opposite side of the spring receiving member from the compression coil spring and penetrating in the axial direction of the compression coil spring.
The railroad vehicle table according to claim 7, further comprising a bolt that is screwed into the female screw hole so as to penetrate the bolt mounting wall and one end thereof abuts on the spring receiving member. A railroad car table placed in the passenger cabin of a railroad car.
With the table body
With the base bracket fixed to the wall surface of the guest room or the stool of the guest room,
A hollow arm that supports the table body and is rotatably connected to the base bracket between a used position extending horizontally from the base bracket and an unused position extending upward from the base bracket.
A table for a railroad vehicle, which is built in the arm and includes an arm moving mechanism for moving the arm to the non-used position when the arm is in a predetermined position between the used position and the non-used position. ..

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