JP2015202782A - Caster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a caster capable of preventing an axle from stopping in a position coinciding with a turning shaft, while reducing force required for turning time.SOLUTION: Assuming that a hand-push carriage advances in the arrow A direction. In this case, an axle X is positioned on the opposite side (the right side in Fig.) of the advance direction to a turning shaft Y, and a lock rod 80 is inserted into a first hole 53. That is, a slider 50 is regulated in moving to the left side from the right side in Fig. by the lock rod 80 and a partition wall 55. In other words, a position of the axle X is regulated to the right side in Fig. more than the turning shaft Y so that the axle X does not coincide with the turning shaft Y. Thus, even if the hand-push carriage is decelerated and stopped, the axle X can be prevented from stopping in a position coinciding with the turning shaft Y.

Description

  The present invention relates to a caster, and more particularly to a caster capable of preventing the axle from stopping at a position coincident with the turning axis while reducing the force required for turning.

  Conventionally, a swivelable caster has been used for a hand cart and an automatic guided vehicle. The caster is attached to a position where the axle is eccentric from the turning axis, and is configured so that the axle is located on the opposite side of the traveling direction with respect to the turning axis during traveling. For example, when the hand cart is turned 180 degrees (switchback), the caster turns 180 degrees with the ground contact surface of the wheel as the center of rotation and the eccentricity as the radius, and the axle moves in the direction of travel with respect to the turning axis. It is configured to be located on the opposite side. Thereby, the caster can travel stably.

  However, when a heavy object is loaded, since the stationary torque of the wheel increases during turning (particularly during switchback), a large force is required to turn the caster. Therefore, the following Patent Document 1 describes a caster configured to be able to slide the axle 5 in the horizontal direction with respect to the rotating shaft 4 (swivel axis). According to this caster, for example, when switching back, the axle 5 slides in the direction opposite to the traveling direction before the vehicle body travels, so that the force required for switching back can be reduced.

JP-A-11-240304

  However, in the caster described in Patent Document 1, there is a possibility that the axle 5 stops at a position where the axle 5 coincides with the rotating shaft 4. That is, if the axle 5 stops at a position where it coincides with the rotating shaft 4, there is a problem that the grounding surface of the wheel 6 and the rotating shaft 4 coincide with each other and the wheel 6 cannot be turned.

  The present invention has been made to solve the above-described problems, and in particular, to provide a caster that can prevent the axle from stopping at a position that coincides with the turning axis while reducing the force required for turning. With the goal.

  In order to achieve this object, a caster according to claim 1 includes a wheel and a turning mechanism connected to a vehicle body for turning the wheel about a turning axis, and is connected to the turning mechanism. A guide extending in the horizontal direction intersecting with the turning axis of the turning mechanism, and a moving body attached to the guide so as to be movable in the horizontal direction along the guide and rotatably supporting the wheel at the center of the axle And appearing on the moving path of the moving body to restrict the axle from moving from one side to the other or the other side across the turning shaft, and retreating from the moving path of the moving body so that the axle is And a locking mechanism that allows movement from one side to the other side or the other side to the other side across the pivot shaft.

  The caster according to a second aspect is the caster according to the first aspect, wherein the moving body includes a slider attached to the guide so as to be movable in a horizontal direction along the guide, and the wheel connected to the slider. A connecting member in which a first surface is opposed to the guide and a second surface opposite to the first surface is connected to the fork between the guide and the fork. The locking mechanism extends between the through hole extending coaxially with the pivot shaft and opened in the guide, the first hole opened in the first surface of the connecting member, and the first hole. The slider is inserted through the second hole opened in the first surface of the connecting member across the axle, the through hole and the first hole, or inserted through the through hole and the second hole. The first hole or And a lock member to allow the said slider moves by being pulled out of the second hole.

  The caster according to claim 3 is the caster according to claim 2, wherein the connecting member includes a partition wall that partitions the first hole and the second hole in the horizontal direction, and the guide of the partition wall The opposing surfaces are configured to be inclined downward toward the first hole side or the second hole side.

  The caster according to claim 4 is the caster according to claim 2, wherein the connecting member includes a partition wall that partitions the first hole and the second hole in the horizontal direction, and the guide of the partition wall The opposing surfaces are configured to be inclined downward from the middle between the first hole and the second hole toward the first hole side and the second hole side.

  According to the caster according to claim 1, for example, when the vehicle is traveling in the first direction, the axle is located on one or the other side of the turning shaft that is the second direction opposite to the first direction. In this case, the lock mechanism is caused to appear in the moving path of the moving body, and the axle is restricted from moving from one side to the other side or the other side across the turning shaft. Therefore, even if the vehicle body stops thereafter, the axle is located on one or the other side of the turning axis, and the axle can be prevented from stopping at a position that coincides with the turning axis. That is, it is possible to avoid a situation where the axle stops at a position where it coincides with the turning axis and the wheels cannot be turned. On the other hand, for example, when the vehicle body is switched back in the second direction from the state where the axle is positioned on one side or the other side across the turning axis and stopped, the lock mechanism is retracted from the moving path of the moving body. The axle is allowed to move from one side to the other side or the other side across the turning axis. Then, before moving in the second direction, the moving body moves along the guide toward the first direction opposite to the second direction, and accordingly, the axle also moves from one side to the other side or the other side across the turning axis. Move to one side. Therefore, the force required for turning (especially when switching back) can be reduced as compared with the case where the axle is fixed to the turning shaft. Therefore, there is an effect that it is possible to prevent the axle from stopping at a position coinciding with the turning axis while reducing the force required for turning.

  According to the caster according to the second aspect, in addition to the effect produced by the caster according to the first aspect, the lock member is inserted into the through hole that extends coaxially with the pivot shaft and is opened in the guide, When the hole moves to a position facing the through hole as the slider moves, the slider is moved by inserting the lock member into the through hole and the first hole, or by inserting the lock member into the through hole and the second hole. The slider is allowed to move by being pulled out of the first hole or the second hole. In other words, since the lock member is arranged coaxially with the swivel axis, it is possible to restrict / allow the movement of the slider by providing a plurality of lock members at different locations, but the lock mechanism is simpler than this case. There is an effect that it can be configured.

  According to the caster according to claim 3, in addition to the effect produced by the caster according to claim 2, the surface facing the guide among the partition walls partitioning the first hole and the second hole in the horizontal direction is the first hole. When the lock member comes into contact with the surface of the partition member facing the guide, the lock member is made into the first hole or the second hole. Easy to introduce. For example, it is assumed that the surface facing the guide is configured to be inclined downward toward the second hole side. In this case, when the lock member is pulled out from the first hole and inserted into the second hole, the slider is moved and locked to the second hole at the timing when the second hole moves to a position facing the lock member. What is necessary is just to insert a member. However, if this timing is after the axle has passed the swivel axis and before the second hole reaches the position facing the lock member, the lock member contacts the surface of the partition wall facing the guide. Will be in touch. In this case, since the surface with which the lock member abuts is inclined downward toward the second hole, the lock member can be easily introduced into the second hole. In addition, when the surface facing the guide is configured to be inclined downward toward the first hole, the lock member can be easily introduced into the first hole, contrary to the case described above.

  According to the caster according to claim 4, in addition to the effect achieved by the caster according to claim 2, the surface facing the guide among the partition walls that partition the first hole and the second hole in the horizontal direction is the first hole. When the locking member comes into contact with the surface of the partitioning member facing the guide, it is configured to be inclined downward from the middle between the first hole and the second hole toward the first hole side and the second hole side. The lock member can be easily introduced into the first hole or the second hole. When pulling out the lock member from the first hole and inserting the lock member into the second hole, the lock member is inserted into the second hole when the slider moves and the second hole moves to a position facing the lock member. You can do it. However, if this timing is after the axle has passed the swivel axis and before the second hole reaches the position facing the lock member, the lock member contacts the surface of the partition wall facing the guide. Will be in touch. In this case, if the surface with which the lock member abuts is inclined downward toward the second hole side, the lock member can be easily introduced into the second hole. Conversely, when the lock member is pulled out from the second hole and inserted into the first hole, the slider is moved and locked to the first hole when the first hole moves to a position facing the lock member. What is necessary is just to insert a member. However, if this timing is after the axle has passed the swivel axis and before the first hole reaches the position facing the lock member, the lock member contacts the surface of the partition wall facing the guide. Will be in touch. In this case, if the surface with which the lock member abuts is inclined downward toward the first hole, the lock member can be easily introduced into the first hole. That is, for example, if the highest position of the downward inclined surface on the first hole side and the downward inclined surface on the second hole side coincides with the position of the axle, the surface of the partition member that faces the guide When the lock member comes into contact with the first and second holes, the lock member can be easily introduced into the first hole or the second hole with good balance.

(A) is a side view of a caster, (b) is a front view of a caster. It is a figure explaining operation | movement of the caster in the case of switching back from the arrow A direction to the arrow B direction. It is a figure explaining operation | movement of the caster in the case of switching back from the arrow B direction to the arrow A direction.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1A is a side view of the caster 1, and FIG. 1B is a front view of the caster 1. In FIG. 1, in order to facilitate understanding of the configuration of the caster 1, a part of the caster 1 is shown in cross section. In the present embodiment, the casters 1 are mounted at the four corners of the loading platform D of the handcart, and in particular, can reduce the force required at the time of turning, and can prevent the axle from stopping at a position coincident with the turning axis. It is.

  The caster 1 mainly includes a turning mechanism 30 attached to the lower surface of the loading platform D, a guide 40 connected to the turning mechanism 30, a slider 50 that moves in the horizontal direction along the guide 40, and a slider 50. The fork 60 is connected to support the wheel 70, the wheel 70, the lock rod 80, and the tension device 90 that lifts the lock rod 80.

  The turning mechanism 30 turns the wheel 70 about the turning axis Y, and is mainly configured by upper and lower plates 31 and 32 and a ball bearing 33 disposed between the upper and lower plates 31 and 32. Yes. The upper and lower plates 31 and 32 are formed in a plate shape, and one surface of the upper plate 31 is fixed to the lower surface of the loading platform D, and the ball bearing 33 is fixed to the other surface. The lower plate 32 has a ball bearing 33 fixed to the surface on the upper plate 31 side, and a guide 41 fixed to the opposite surface. Further, through holes 35 and 36 are opened at the centers (rotating axes Y) of the upper and lower plates 31 and 32, and a lock rod 80 is inserted into the through holes 35 and 36 so as to be slidable up and down.

  The ball bearing 33 connects the lower plate 32 to the upper plate 31 so as to be pivotable about the pivot axis Y. Thereby, the turning mechanism can turn the guide 40, the slider 50, the fork 60, and the wheel 70 connected to the lower plate 32 in addition to the lower plate 32 around the turning axis Y.

  The guide 40 movably supports the slider 50, and includes a rail portion 41 and a stopper portion 42. The rail portion 41 is a portion to which the slider 50 moves, is formed in a plate shape that hangs downward from the lower plate 32, intersects the pivot axis Y, and is linear in the horizontal direction (the left-right direction in FIG. 1A). It extends and is comprised. A through hole 43 is opened at the center of the rail portion 41 (swivel axis Y), and a lock rod 80 is inserted into the through hole 43 so as to be slidable up and down. The stopper portion 42 is configured to project to the side of the rail portion 41 at both ends of the rail portion 41, and the stopper portion 42 prevents the slider 50 from coming off the rail portion 41.

  The slider 50 is configured by an LM guide (linear motion guide), and is attached to the guide 40 so as to be movable in the horizontal direction along the guide 40. As shown in FIG. 1B, the slider 50 is formed in a concave shape in cross section, and includes a bottom wall 51 disposed between the guide 40 (rail portion 41) and the fork 60, and both sides of the bottom wall 51. Side walls 52 and 52 are provided so as to sandwich both sides of the guide 40 (rail portion 41).

  As shown in FIG. 1A, the bottom wall 51 is provided with a first hole 53 and a second hole 54 on a surface facing the guide 40 (rail portion 41), and a fork 60 on the opposite surface. It is connected. The first hole 53 and the second hole 54 are holes into which the lock rods 80 are inserted, and the first hole 53 and the second hole 54 are horizontally disposed on the axle X (shown in FIG. 1B). It is opened at a position that sandwiches the position of the axle O in the horizontal direction (the same applies hereinafter) (position that sandwiches the partition wall 55 in the horizontal direction).

  Therefore, when the lock rod 80 is inserted into the first hole 53, the slider 50 is restricted from moving from the right side to the left side by the lock rod 80 and the partition wall 55. In other words, the position of the axle X is restricted to the right side in the figure relative to the turning axis Y so that the axle X does not coincide with the turning axis Y. On the other hand, when the lock rod 80 is inserted into the second hole 54, the slider 50 is restricted from moving from the left side to the right side by the lock rod 80 and the partition wall 55, contrary to the above. Is done. In other words, the position of the axle X is restricted to the left in the drawing relative to the turning axis Y so that the axle X does not coincide with the turning axis Y.

  Further, the partition wall 55 sandwiched between the first hole 53 and the second hole 54 has a surface facing the guide 40 (rail portion 41) and an inclined surface 55a inclined downward toward the first hole 53 side. And an inclined surface 55b inclined downward toward the second hole 54 side. As a result, the lock rod 80 in contact with the inclined surface 55 a and the inclined surface 55 b can be easily introduced into the first hole 53 and the second hole 54.

  A steel ball (not shown) is interposed between the side walls 52 and 52 and the wall surface of the opposing rail portion 41, whereby the guide 50 can move in the horizontal direction along the guide 40.

  As shown in FIG. 1B, the fork 60 is formed in an inverted concave shape in sectional view, and includes an upper wall 61 and side walls 62 and 62 that hang downward from both ends of the upper wall 61. The upper wall 61 is connected to the bottom wall 51 of the slider 50. The side walls 62 and 62 support the wheel 70 so as to be rotatable about the axle O with the wheel 70 interposed therebetween.

  The lock rod 80 restricts the movement of the slider 50, and is slidable in the vertical direction coaxially with the pivot axis Y, and the through holes 35, 36 of the upper and lower plates 31, 32, and the guide 40 (rail portion 41). The through hole 43 is inserted. The lock rod 80 is urged downward by a coil spring 81 provided between the upper and lower plates 31 and 32 of the turning mechanism 30. Thus, since the lock rod 80 is arranged coaxially with the turning axis Y, the configuration and operation for locking and releasing the slider 50 can be simplified.

  That is, for example, two lock rods 80 are provided with the turning axis Y interposed therebetween. When the axle X is moved through the turning axis Y, both lock rods 80 are released, and when the first hole 53 is moved to a position facing one lock rod 80, one lock rod is moved. When the second hole 54 moves to a position facing the other lock rod 80, the other lock rod 80 is released and locked by the one lock rod 80. To do. Although such a configuration is possible, in this case, two lock rods 80 are required, and the operation of moving the lock rod 80 up and down is complicated. On the other hand, in this embodiment, since the lock rod 80 is arranged coaxially with the turning axis Y, the configuration and operation for locking and releasing the slider 50 can be simplified.

  The tension device 90 includes a wire 91, an operation lever 92, and a pulley 93. One end of the wire 91 is connected to the lock rod 80, and the other end is connected to the operation lever 92 via a pulley 93 in the middle. When the operator operates the operation lever 92 downward against the urging force of the coil spring 81, the wire 91 pulls the lock rod 80 upward via the pulley 93. Thereby, the lock rod 80 inserted into the first hole 53 or the second hole 54 is pulled upward, and the movement of the slider 50 restricted by the lock rod 80 can be released. Note that the other casters mounted on the handcart are also connected to the operation lever 92 by wires, and by operating the operation lever 92, the other casters can be simultaneously unlocked.

  Next, the operation of the caster 1 will be described with reference to FIGS. FIG. 2 is a diagram for explaining the operation in the case where the handcart that has proceeded in the direction of the arrow A stops and is then switched back in the direction of the arrow B. 2 and 3, the tension device 90 is not shown.

  First, as shown in FIG. 2A, it is assumed that the hand cart is traveling in the direction of arrow A. In this case, the axle X is located on the side opposite to the traveling direction A (right side in the drawing) with respect to the turning axis Y, and the lock rod 80 is inserted into the first hole 53. That is, the slider 50 is restricted from moving from the right side to the left side in the drawing by the lock rod 80 and the partition wall 55. In other words, the position of the axle X is restricted to the right in the drawing relative to the turning axis Y so that the axle X does not coincide with the turning axis Y. Therefore, even if the handcart is decelerated and stopped from the state shown in FIG. That is, it is possible to avoid a situation in which the axle X stops at a position that coincides with the turning axis Y and the wheel 70 cannot be turned.

  Next, as shown in FIG. 2B, after the handcart is stopped, the operator operates the operation lever 92 (see FIG. 1) downward to release the lock. That is, the lock rod 80 inserted into the first hole 53 is pulled upward, and the slider 50 is allowed to move.

  Next, as shown in FIGS. 2 (c) and 2 (d), when the handcart is pushed in the direction of the arrow B opposite to the direction of the arrow A by the operator, the slider 50 first moves along the guide 40 with the arrow. Move in direction A. In other words, the axle X located on the right side of the turning axis Y starts to move in the direction of arrow A, passes through the turning axis Y as shown in FIG. As shown, the second hole 54 moves to a position facing the lock rod 80 (position on the left side of the turning axis Y).

  This is because the resistance that the slider 50 moves along the guide 40 is smaller than the frictional force against the ground contact surface of the wheel 70. Therefore, it is possible to reduce the force required for switching back, compared to a conventional caster in which the axle X is fixed at a position eccentric from the turning axis Y.

  2E, when the operator releases the operation of the operation lever 92, the lock rod 80 is inserted into the second hole 54 by the urging force of the coil spring 81, and the lock rod 80 and the partition wall 55 The slider 50 is restricted from moving from the left side to the right side in the drawing. In other words, the position of the axle X is restricted to the left in the figure relative to the turning axis Y so that the axle X does not coincide with the turning axis Y. In other words, even if the hand cart traveling in the direction of the arrow B is subsequently decelerated and stopped, it is possible to prevent the axle X from stopping at a position that coincides with the turning axis Y.

  2D, that is, when the operator releases the operation lever 92 before the slider 50 moves to the position where the second hole 54 opposes the lock rod 80, the timing thereof. However, at least after the axle X has passed the turning axis Y, the lock rod 80 contacts the inclined surface 55b of the partition wall 55. Since the inclined surface 55 b is lowered toward the second hole 54, the lock rod 80 can be easily introduced into the second hole 54.

  FIG. 3 is a diagram for explaining the operation in the case where the handcart that has proceeded in the direction of arrow B stops and then switches back in the direction of arrow A, contrary to FIG. First, it is assumed that the hand cart is traveling in the direction of arrow B as shown in FIG. In this case, the axle X is located on the side opposite to the traveling direction B (left side in the figure) with respect to the turning axis Y, and the lock rod 80 is inserted into the second hole 54. That is, the slider 50 is restricted from moving from the left side to the right side in the drawing by the lock rod 80 and the partition wall 55. In other words, the position of the axle X is restricted to the left side of the turning axis Y so that the axle X does not coincide with the turning axis Y. Therefore, even if the handcart is decelerated and stopped from the state shown in FIG. 3A, it is possible to prevent the axle X from stopping at a position corresponding to the turning axis Y.

  Next, as shown in FIG. 3B, after the hand cart is stopped, the operation lever 92 (see FIG. 1) is operated by the operator to release the lock. That is, the lock rod 80 inserted into the second hole 54 is pulled upward, and the slider 50 is allowed to move.

  Next, as shown in FIGS. 3 (c) and 3 (d), when the handcart is pushed in the direction of the arrow A opposite to the direction of the arrow B by the operator, first, the slider 50 is moved along the guide 40 with the arrow. Move in direction B. In other words, the axle X located on the left side of the turning axis Y starts to move in the direction of the arrow B, passes through the turning axis Y as shown in FIG. As shown, the first hole 53 moves to a position facing the lock rod 80 (a position on the right side of the turning axis Y).

  This is because the resistance that the slider 50 moves along the guide 40 is smaller than the frictional force against the ground contact surface of the wheel 70. Therefore, it is possible to reduce the force required for switching back, compared to a conventional caster in which the axle X is fixed at a position eccentric from the turning axis Y.

  3E, when the operator releases the operation of the operation lever 92, the lock rod 80 is inserted into the first hole 53 by the urging force of the coil spring 81, and the lock rod 80 and the partition wall 55 The slider 50 is restricted from moving from the right side to the left side in the drawing. In other words, the position of the axle X is restricted to the right side in the figure relative to the turning axis Y so that the axle X does not coincide with the turning axis Y. That is, even if the hand cart traveling in the direction of arrow A subsequently decelerates and stops, it is possible to prevent the axle X from stopping at a position that coincides with the turning axis Y.

  3D, that is, when the operator releases the operation lever 92 before the slider 50 moves to the position where the first hole 53 faces the lock rod 80, the timing However, at least after the axle X has passed the turning axis Y, the lock rod 80 contacts the inclined surface 55a of the partition wall 55. Since the inclined surface 55 a is lowered toward the first hole 53, the lock rod 80 can be easily introduced into the first hole 53.

  Although the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be easily made without departing from the spirit of the present invention. Can be inferred.

  Although the case where the caster 1 is applied to a hand cart has been described in the above embodiment, the target to which the caster 1 is applied is not limited to the hand cart. For example, it can be applied to an automatic guided vehicle. When the caster 1 is applied to an automatic guided vehicle, an actuator for pulling up the lock rod 80 is provided instead of the pulling device 90, and a position sensor capable of detecting the position of the slider 50 is provided. In this case, according to the position of the slider 50 detected by the position sensor and the traveling direction, the actuator is operated so that the lock rod 80 moves up and down as in the above-described embodiment. As a result, as in the above-described embodiment, it is possible to prevent the axle from stopping at a position that coincides with the turning axis while reducing the force required for turning (particularly, switchback). Further, the lock rod 80 can be moved up and down more accurately than when applied to a hand cart. In addition, when applied to an automatic guided vehicle, the position sensor can determine whether or not the axle X and the turning axis Y are stopped at the same position. Therefore, even if the axle X and the turning axis Y stop at a position where they coincide, it can be controlled to cancel it.

  Moreover, although the said embodiment demonstrated the case where the lock rod 80 was provided coaxially with the turning axis Y, as a structure which locks the slider 50, it is not limited to this. For example, a regulating wall may be provided on both sides of the turning axis Y in the horizontal direction so as to be able to protrude and retract from the path of the slider 50 at positions facing the standing walls 52 and 52 of the slider 50 in the moving direction of the slider 50. good.

  Moreover, although the said embodiment demonstrated the case where the lock rod 80 was pulled up with the tension | pulling apparatus 90, it is not limited to this, If it is the structure which can raise and lower the lock rod 80, it can be employ | adopted.

  In the above embodiment, the case where the movement of the slider 50 is restricted by the lock rod 80 has been described. However, the movement of the slider 50 is not limited to the lock rod 80. For example, the slider 50 may be configured by an LM guide with a brake, and the movement of the slider 50 may be regulated by the brake for the LM guide.

  Furthermore, although the case where the slider 50 is configured by an LM guide has been described in the above embodiment, the present invention is not limited to this. That is, the slider 50 only needs to be movable in the horizontal direction along the guide 40. For example, the slider 50 is provided with a rotatable rotor (roller), and the rotor (roller) moves on the guide 40. A long hole extending in the horizontal direction may be provided, and the rotor (roller) may move in the horizontal direction along the long hole.

DESCRIPTION OF SYMBOLS 1 Caster 30 Turning mechanism 40 Guide 43 Through-hole 50 Slider 51 Bottom wall (connection member)
53 First hole 54 Second hole 55 Partition wall 60 Fork 70 Wheel 80 Lock rod (lock member)

Claims (4)

In a caster comprising a wheel and a turning mechanism connected to a vehicle body and turning the wheel about a turning axis,
A guide connected to the turning mechanism and extending in a horizontal direction across the turning axis of the turning mechanism;
A movable body attached to the guide so as to be movable in a horizontal direction along the guide and rotatably supporting the wheel at the center of an axle;
Appears on the moving path of the moving body, restricts the axle from moving from one side to the other or the other side across the turning shaft, and retracts from the moving path of the moving body to move the axle to the turning axis A caster comprising: a locking mechanism that allows movement from one side to the other side or the other side to the other side. The moving body is
A slider attached to the guide movably in the horizontal direction along the guide;
A fork connected to the slider and rotatably supporting the wheel;
The slider includes a connecting member between the guide and the fork, the first surface facing the guide, and the second surface opposite to the first surface is connected to the fork.
The locking mechanism is
A through hole extending coaxially with the pivot axis and opened in the guide;
A first hole opened in the first surface of the connecting member;
A second hole opened in the first surface of the connecting member with the axle interposed between the first hole and the first hole;
The slider is prevented from moving by being inserted into the through hole and the first hole or inserted through the through hole and the second hole, and is pulled out from the first hole or the second hole. The caster according to claim 1, further comprising: a lock member that allows the slider to move. The connecting member includes a partition wall that partitions the first hole and the second hole in the horizontal direction,
The caster according to claim 2, wherein a surface of the partition wall facing the guide is configured to be inclined downward toward the first hole side or the second hole side. The connecting member includes a partition wall that partitions the first hole and the second hole in the horizontal direction,
The surface of the partition wall facing the guide is configured to be inclined downward from the middle between the first hole and the second hole side toward the first hole side and the second hole side. The caster according to claim 2.

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