JP6093081B1 - Caster lock operating mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a caster lock operating mechanism capable of reducing a burden on a user even when many casters are provided. SOLUTION: A pedal base 6 mounted on a gantry 3 is disposed on the pedal base 6 so as to be rotatable around a first axial center extending horizontally, and a lock bar 71 is provided on the first end side. A lock pedal 7 connected to the horizontal shaft 22 of the caster 2 and a pedal base 6 rotatably disposed about a second axis parallel to the first axis, And a release pedal 8 having a release bar 81 connected to a first end side of the lock pedal 7 and a release bar 81 provided on the second end side. When the lock bar 71 is pushed down, the horizontal shaft 22 rotates in the first direction and the caster 2 is locked, and the release pedal 8 rotates in the forward direction and the release bar 81 is positioned higher. When the release bar 81 is pushed down, the lock pedal 7 rotates in the reverse direction, the horizontal shaft 22 rotates in the second direction, and the caster 2 is unlocked. [Selection] Figure 9

Description

  The present invention relates to a caster lock operation mechanism that is an operation mechanism for locking and unlocking casters.

  Conventionally, as a caster used for a cart or the like, the operating member rotates around a horizontal axis arranged on a stem located on the upper side of the wheel, so that the brake rod moves forward and backward to lock rotation and turning. What is known to be unlocked or unlocked is known. Further, a mechanism is known in which a plurality of casters can be simultaneously locked or unlocked by pushing down or pushing up a step (operating tool) provided at the foot (see, for example, Patent Document 1). .)

  However, with such a mechanism, when releasing the lock, the user's foot must be put under the step and the step must be pushed up, which places a heavy load on the foot. In particular, when the lock and release are repeated frequently, a large load is repeatedly applied to the foot, which is a heavy burden on the user.

  For this reason, an operation mechanism that can be locked and unlocked by depressing (stepping) a step is known (for example, see Patent Document 2). The operation mechanism is configured such that an intermediate portion of a bent first operating arm is attached to a horizontal axis (rotating shaft) for operating a lock mechanism provided on a caster such as a bed, and one end of the first operating arm is attached. Attach the first depressing operation rod to the section. Further, an intermediate portion of the bent second working arm is connected to the other end of the first working arm via a connecting member, and one end of the second working arm is rotatably attached to the frame. Attach the second stepping lever to the end.

  Then, when the first stepping operation rod is depressed, the first operating arm and the horizontal shaft are rotated, the lock mechanism is activated, and the caster is locked. At this time, the second operating arm is rotated in conjunction with the other end of the first operating arm, and the other end of the second operating arm and the second stepping operation rod are displaced in conjunction with each other. When the second stepping operation rod is depressed in this state, the second operating arm is rotated in the reverse direction, and the first operating arm is interlocked and rotated through the connecting member, whereby the horizontal axis is rotated in the reverse direction. The caster is unlocked by the lock mechanism by rotating.

JP 2011-98657 A JP-A-6-48102

  By the way, in the operation mechanism described in Patent Document 2, the first stepping operation rod is attached to the horizontal shaft for operating the lock mechanism via the first operating arm, and the horizontal shaft is rotated. The force required for this is the force (operating force) for operating the first stepping operation rod. For this reason, if the number of casters increases, a correspondingly large operating force is required, which imposes a large burden on the user.

  Therefore, it is conceivable to lengthen the first stepping operation rod in accordance with the number of casters so that a large torque (rotational force) can be obtained. Protruding and not practical. That is, in the conventional operation mechanism, even when there are many casters, there is no idea that the user can perform locking and unlocking without giving a heavy burden to the user.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a caster lock operating mechanism that can reduce the burden on the user even when many casters are provided.

In order to solve the above-mentioned problem, the invention of claim 1 is directed to locking or unlocking a caster that is locked or unlocked by rotating a horizontal shaft that is mounted on a pedestal and disposed on a stem located on an upper side of a wheel. A caster lock operating mechanism for unlocking, a base comprising: an attachment part attached to the mount; and a support part connected to the attachment part and extending horizontally; and from the attachment part side of the support part It extends along the other open end side, and the end portion on the attachment portion side is disposed on the support portion so as to be rotatable about a first axial center extending horizontally, and the first end portion on the open end side is arranged. A first operating part is provided on the end side, and a first operating body connected to the horizontal shaft of the caster, and a second axial center extending horizontally and parallel to the first axial center. It is disposed on the open end side of the rotatably the support portion, the first end Is connected to the first end portion side of the first operating body, and the second operating body is provided with a second operating portion on the second end portion side, and the first operating portion When the first operation unit is pushed down while the second operation unit is positioned at the lower position, the horizontal axis is moved in the positive direction as the first operation body rotates in the forward direction. The caster is locked by rotating in the direction of 1, and the position, plane and height before the second operating body is rotated in the forward direction and the first operating part is pushed down. When the second operation unit moves to approximately the same position and the second operation unit is pushed down in this state, the first operation unit is moved in the reverse direction of the second operation unit. When the caster is unlocked by rotating in the reverse direction and the horizontal axis rotating in a second direction that is the reverse direction of the first direction. In the first operating portion is at a higher, it is characterized.

  According to a second aspect of the present invention, in the caster lock operating mechanism according to the first aspect, the distance from the first axis to the first operating portion is determined according to the number of the casters. It is characterized in that the force for pushing down the part is set to be within a predetermined value.

According to a third aspect of the present invention, in the caster lock operating mechanism according to the first or second aspect, the distance from the second shaft center to the second operating portion depends on the number of the casters. It is characterized in that the force for pushing down the operation unit is set to be within a predetermined value.
According to a fourth aspect of the present invention, in the caster lock operating mechanism according to any one of the first to third aspects, the first operating portion in the unlocked state of the caster and the second in the locked state of the caster. The operation unit is located at substantially the same position on the plane and in height.

  According to the first aspect of the present invention, the first operating body is disposed so as to be rotatable about the first axis of the base different from the horizontal axis of the caster. The caster is locked by depressing the operation unit. Similarly, a second operating body is disposed so as to be rotatable about a second axis of a base different from the horizontal axis of the caster, and the second operating portion of the second operating body is pushed down. The caster is unlocked.

  For this reason, by increasing the distance from the first axis to the first operation section and the distance from the second axis to the second operation section, a large torque (rotational force) can be obtained. Even when the caster is provided, the burden on the user can be reduced. In addition, by adjusting the position of the first axis or the second axis, or adjusting the mounting position of the base to the gantry, the first operation unit or the second operation unit can be moved from the gantry or the like. It can be prevented from protruding greatly, and practicality and convenience can be enhanced. Thus, it is possible to appropriately and easily perform simultaneous locking and simultaneous unlocking of casters without imposing a heavy burden on the user.

  According to the invention of claim 2, the distance from the first axis to the first operation unit is set so that the force for pushing down the first operation unit falls within a predetermined value according to the number of casters. ing. For this reason, even when many casters are provided, the first operating portion can be pushed down and locked with a force within a predetermined value, and the burden on the user can be reduced. On the other hand, since the caster is not locked unless the first operating portion is pushed down with a force within a predetermined value, it is possible to prevent the caster from being inadvertently locked.

According to the invention of claim 3, the distance from the second axis to the second operation part is set so that the force for pushing down the second operation part falls within a predetermined value according to the number of casters. ing. For this reason, even when a large number of casters are provided, the lock can be released by pushing down the second operation unit with a force within a predetermined value, and the burden on the user can be reduced. On the other hand, since the caster is not unlocked unless the second operation portion is pushed down with a force within a predetermined value, it is possible to prevent the caster from being inadvertently unlocked.
According to the invention of claim 4, since the positions of the first operation unit and the second operation unit when pushed down are substantially the same position, the user can change the positions of the first operation unit and the second operation unit. It can be locked and unlocked simply by stepping on the same position without worrying about it.

It is a perspective view which shows the anesthesia machine which concerns on embodiment of this invention, and shows the state which has unlocked the caster. It is a perspective view which shows the anesthesia machine which concerns on embodiment of this invention, and shows the state which has locked the caster. It is a front view which shows the caster of FIG. It is a perspective view which shows the trolley | bogie of the anesthesia machine of FIG. It is a top view of the trolley | bogie of FIG. FIG. 6 is a right side view of FIG. 5. FIG. 6 is a left side view of FIG. 5. FIG. 6 is a front view of FIG. 5. FIG. 5 is a perspective view showing a state in which the gantry is removed in the cart of FIG. 4. FIG. 10 is a plan view of FIG. 9. It is a front view of FIG. FIG. 10 is a perspective view corresponding to FIG. 9 when the caster is in a locked state. FIG. 13 is a plan view of FIG. 12. FIG. 14 is a front view of FIG. 13. FIG. 5 is a perspective view corresponding to FIG. 4 when a caster is in a locked state. It is a top view of the trolley | bogie of FIG. It is a right view of FIG. FIG. 17 is a left side view of FIG. 16. FIG. 17 is a front view of FIG. 16. It is a perspective view which shows the pedal base of the caster lock operation mechanism of the anesthesia machine of FIG. It is a perspective view which shows the lock pedal of the caster lock operation mechanism of the anesthesia machine of FIG. It is a perspective view which shows the release pedal of the caster lock operation mechanism of the anesthesia machine of FIG. It is a perspective view which shows the lock release state of the caster lock operation mechanism of the anesthesia machine of FIG. It is a perspective view which shows the locked state of the caster lock operation mechanism of the anesthesia machine of FIG. It is the figure (a) which shows the conventional horizontal axis periphery, and the figure (b) which shows the horizontal axis periphery of the caster of FIG.

  The present invention will be described below based on the illustrated embodiments.

  1 to 24 show an embodiment of the present invention, and FIGS. 1 and 2 show a carriage 13 including a plurality of caster lock mechanisms 11 and a caster lock operation mechanism (operation mechanism) 12 according to this embodiment. 1 is a perspective view showing an anesthesia machine 1 in which an anesthesia machine body (medical equipment) 14 which is a precision instrument is mounted as a mounted object. The multiple caster lock mechanism 11 is a lock mechanism for simultaneously locking or unlocking the plurality of casters 2, and the caster lock operation mechanism 12 is an operation mechanism for locking or unlocking the casters 2.

  Here, as shown in FIG. 3, the caster 2 is arranged on the stem 20 located on the upper side of the wheel 21, and the horizontally extending horizontal shaft 22 is rotated to lock the rotation and turning of the wheel 21. It can be unlocked, existing or ready-made. That is, when the horizontal shaft 22 rotates by a predetermined angle (for example, 30 degrees) in the first direction (for example, counterclockwise), the rotation and turning of the wheel 21 are locked, and in this state, When the horizontal shaft 22 rotates by a predetermined angle (for example, 30 degrees) in the second direction (for example, clockwise) that is the reverse direction, that is, when the horizontal shaft 22 returns to its original position, the lock is released and the wheel 21 is released. Can be rotated and swiveled.

  The caster lock mechanism 11 includes a caster 2 (wheel 21) attached to the lower side of the gantry 3, and includes a lock member 4 that is a movable member and an interlocking member 5. Here, in this embodiment, casters 2 are attached to the four corners of the gantry 3 formed in a substantially rectangular shape, and a plurality of caster lock mechanisms 11 are provided on the left and right as viewed from the front and front of the anesthesia machine 1, respectively. . That is, two casters 2 are simultaneously locked or unlocked by one caster lock mechanism 11.

  Specifically, as shown in FIGS. 4 to 7, the gantry 3 is composed of square pipes 31 to 34 that are long and rectangular hollow members having a rectangular cross section. A first square pipe 31 and a second square pipe 32 extending in the depth direction are arranged in parallel. These square pipes 31 and 32 are connected by a third square pipe 33 and a fourth square pipe 34 that extend perpendicularly to the square pipes 31 and 32, and are generally flat and substantially rectangular (substantially ladder-like). ) Is formed. Here, the 4th square pipe 34 located in the front side of the anesthesia machine 1 is arrange | positioned so that the caster lock operation mechanism 12 mentioned later may not protrude largely from the mount frame 3 or the anesthesia machine 1. FIG.

  As described above, the gantry 3 is configured by the hollow square pipes 31 to 34, so that the hollow portions of the square pipes 31 to 34 serve as accommodation spaces (internal spaces) of the gantry 3. The casters 2 are attached to both ends of the first square pipe 31 and both ends of the second square pipe 32 that are the four corners of the gantry 3. That is, as shown in FIG. 8, the wheel 21 is arranged on the lower side (lower surface side) of the square pipes 31 and 32 and the casters 2 are attached, and the horizontal pipes are accommodated in the accommodation space (hollow part) of the square pipes 31 and 32. A shaft 22 is arranged.

  The first square pipe 31 and the second square pipe 32 are respectively provided with a plurality of caster lock mechanisms 11 having the same configuration. Here, the plurality of caster lock mechanisms 11 of the first square pipe 31 are mainly described. explain.

  As shown in FIGS. 9 to 11, the lock member 4 is disposed in the accommodating space portion of the first square pipe 31 that is the gantry 3, and has one end portion (the first end portion and the base end portion of the rotation). ) Is connected to the horizontal shaft 22 of the caster 2. That is, as shown in FIG. 9, the lock member 4 is substantially U-shaped as a whole, and the horizontal shaft 22 passes through the opening end (one end) side of the both sides 4 a having a substantially rectangular shape. It is connected to. As a result, the horizontal shaft 22 and the lock member 4 rotate in conjunction with each other. Here, the shape of the lock member 4 may be any shape, for example, may be a substantially rectangular shape or a substantially oval shape, or may be constituted by a single plate-like member.

  The interlocking member 5 is long and is disposed in the accommodating space portion of the first square pipe 31 that is the gantry 3, and the other end portions (second end portions of the plurality of lock members 4 are rotated. The free end portion is connected and is rotatable about an axis extending in parallel with the horizontal shaft 22. That is, as shown in FIG. 9, the interlocking member 5 is a long body having a substantially U-shaped cross section and is disposed with the opening facing upward, and the both end sides are only the side portions 5 a without the bottom portion. ing. Then, both end portions of the interlocking member 5 are rotatably connected to the other end portion of the lock member 4 (the opposite opening end portions of the side portions 4a). Here, as shown in FIG. 11, long holes 51 are formed in both side portions 5 a of both ends of the interlocking member 5, and a connecting pin 41 provided at the other end portion of the lock member 4 is inserted into the long hole 51. Thus, the lock member 4 and the interlocking member 5 are pin-connected so as to be rotatable.

  In this way, the horizontal shaft 22 of the caster 2 on the near side and the far side of the anesthesia machine 1 is connected via the interlocking member 5 having the lock member 4 connected to both ends. Further, a rotation support shaft (axial center) 52 extending in parallel with the horizontal shaft 22 passes through both side portions 5a of the central portion of the interlocking member 5 and is disposed in the first square pipe 31, and this rotation support shaft. The interlocking member 5 is rotatable in a seesaw shape around 52. Here, the horizontal shaft 22 extends in the width direction of the anesthesia machine 1, and accordingly, the rotation support shaft 52 also extends in the width direction of the anesthesia machine 1.

  When the interlocking member 5 rotates in one direction, each lock member 4 and each horizontal shaft 22 rotate in the first direction so that the two casters 2 are locked. That is, in this embodiment, when the interlocking member 5 rotates clockwise (one direction) around the rotation support shaft 52 in the state of FIG. 11 in which the caster 2 is not locked, FIGS. As shown, the lock members 4 at both ends of the interlocking member 5 rotate counterclockwise (first direction) together with the horizontal shaft 22, and the casters 2 are locked.

  On the other hand, when the interlocking member 5 rotates in the other direction while the casters 2 are locked, the lock members 4 and the horizontal shafts 22 rotate in the second direction, and the two casters 2 are locked. It is to be released. That is, when the interlocking member 5 rotates counterclockwise (the other direction) around the rotation support shaft 52 in the state of FIG. 14 in which the caster 2 is locked, the interlocking is performed as shown in FIGS. The locking members 4 at both ends of the member 5 rotate clockwise (second direction) together with the horizontal shaft 22, and the casters 2 are unlocked.

  Here, within the range in which the horizontal shaft 22 and the lock member 4 are rotated by an angle necessary for locking and unlocking the caster 2, the arrangement height is lowered, that is, from one end of the lock member 4 to the other. The lock member 4 is disposed in the accommodating space portion of the first square pipe 31 that is the gantry 3 so that the height to the end portion is lowered. That is, in the unlocked state shown in FIG. 11, both side portions 4a of the lock member 4 on the near side (right side in the figure) face obliquely upward and face the lock member 4 on the back side (left side in the figure), Both side portions 4a of the locking member 4 face substantially horizontally and face the locking member 4 on the near side. On the other hand, in the locked state shown in FIG. 14, the back side lock member 4 faces obliquely upward and faces the front side lock member 4, and the front side lock member 4 faces substantially horizontal and the back side lock member. 4 to face.

  In this way, the other end portions of the two lock members 4 connected by the interlocking member 5 are disposed so as to face each other. That is, both side portions 4a of both lock members 4 are arranged as horizontal as possible (first square pipe 31), and even if the horizontal shaft 22 and the lock member 4 rotate, the lock members from the horizontal shaft 22 The protrusion height of 4 becomes low. Here, the angle difference between the state in which the both side portions 4a of the lock member 4 are substantially horizontal and the state in which the lock member 4 faces obliquely upward is an angle / rotation angle required for locking and unlocking the caster 2.

  The caster lock operating mechanism 12 is a mechanism for rotating a plurality of interlocking members 5 in the same direction. In this embodiment, the interlocking member 5 of the first square pipe 31 and the interlocking member 5 of the second square pipe 32 are used. This is an operation mechanism for rotating the two interlocking members 5 in the same direction. Here, rotating the two interlocking members 5 in the same direction means that the two multiple caster lock mechanisms 11 are simultaneously locked or unlocked.

  As shown in FIGS. 4 and 15, the caster lock operation mechanism 12 mainly includes a pedal base (base) 6, a lock pedal (first operation body) 7, and a release pedal (second operation body) 8. It is equipped with.

  The pedal base 6 is a base that is attached to the gantry 3 and rotatably supports and holds the lock pedal 7 and the release pedal 8. As shown in FIG. 20, as shown in FIG. And a pair of support portions 62 that support the lock pedal 7 and the release pedal 8.

  That is, the attachment portion 61 is a substantially rectangular flat plate, and a vertical portion 63 extending downward from the edge of one long side of the attachment portion 61 is formed. Further, the attachment portion 61 extends from the lower end edge of the vertical portion 63. A horizontal portion 64 extending horizontally in parallel with the horizontal axis is formed. The support portion 62 has a flat plate shape and is formed to extend vertically from both side edges of the horizontal portion 64 along both side edges of the vertical portion 63. Further, the first support hole 62a is formed concentrically on both the support portions 62 on the mounting portion 61 side (vertical portion 63 side), and further on the release end side (anti-vertical portion 63 side). A support hole 62b is formed concentrically.

  As shown in FIG. 4, such a pedal base 6 has a mounting portion 61 mounted on the upper surface of the fourth square pipe 34 that constitutes the gantry 3, and is fixed with a bolt or the like. It is attached to the pipe 34. In such an attachment state, the first axis connecting the first shaft support holes 62a facing each other and the second axis connecting the second shaft support holes 62b facing each other are parallel to each other and horizontally. The horizontal shaft 22 and the rotation support shaft 52 are also parallel to each other.

  The lock pedal 7 is disposed on the pedal base 6 so as to be rotatable about a first axial center extending horizontally, and a lock bar (first operation portion) 71 is provided on the first end side, and is caster. Are connected to two horizontal shafts 22. That is, as shown in FIG. 21, side plate portions 73 that extend in a substantially U shape are formed from the edges of both short sides of the first flat plate portion 72 that is flat and substantially rectangular. The lower end edge is connected by the second flat plate portion 74.

  The lock bar 71 is in the shape of a round bar and is arranged so as to connect and erection the free ends of the side plate portions 73 (the first end side of the lock pedal 7 and the free end of rotation). Yes. Further, a third shaft support hole 73a is formed concentrically on the lock bar 71 side immediately below the short side of the first flat plate portion 72 of both side plate portions 73, and further, a fourth shaft is formed on the anti-lock bar 71 side. A shaft support hole 73b is formed concentrically.

  23 and 24, the first support shaft 75 is inserted into the first shaft support hole 62a and the fourth shaft support hole 73b in a state where the lock pedal 7 is overlapped with the pedal base 6. It is fixed. In this state, the first support shaft 75 extends horizontally in parallel with the horizontal shaft 22, and the lock pedal with respect to the pedal base 6 is centered on the first shaft center that is the shaft center of the first support shaft 75. 7 is rotatable.

  Further, as shown in FIGS. 9 and 12, a connecting bar 76 is disposed so as to pass through both third shaft support holes 73 a, and both end portions of the connecting bar 76 pass through both side portions 5 a of the interlocking member 5. And fixed. Thus, the lock pedal 7 is connected to the horizontal shaft 22 of the caster 2 via the connecting bar 76 and the interlocking member 5. Here, the connecting bar 76 penetrates between the locking member 4 on the front side and the rotation support shaft 52.

  The release pedal 8 is disposed on the pedal base 6 so as to be rotatable about a second axis that extends horizontally and is parallel to the first axis, and the first end portion side of the release pedal 8 is the first of the lock pedal 7. It is connected to the end side, and a release bar (second operation unit) 81 is provided on the second end side. That is, as shown in FIG. 22, two substantially V-shaped (bifurcated) side plate portions 82 are connected to each other by the connecting member 83 in a state of being opposed to each other, and a corner of each side plate portion 82 has a fifth shaft. A support hole 82a is formed concentrically.

  Further, a long hole 82b is formed concentrically at one end portion of the both side plate portions 82 (on the first end portion side of the release pedal 8 and the first free end portion of rotation). The release bar 81 has a round bar shape and is arranged so as to connect and construct the other end of the both side plate portions 82 (on the second end side of the release pedal 8 and the second free end of rotation). It is installed.

  As shown in FIGS. 23 and 24, the lock bar 71 is inserted into both the long holes 82 b, whereby one end portion side of the release pedal 8 is connected to one end portion side of the lock pedal 7. A second support shaft 84 is inserted and fixed in the fifth shaft support hole 82 a and the second shaft support hole 62 b of the pedal base 6. In this state, the second support shaft 84 extends horizontally in parallel with the first support shaft 75 (the horizontal shaft 22) that is the first shaft center, and the second support shaft 84 is the second support shaft 84. The release pedal 8 is rotatable with respect to the pedal base 6 about the axis of the center.

  Here, the distance (rotational radius) from the first support shaft 75, which is the first axis, to the lock bar 71 is a predetermined value depending on the number of casters 2 of the anesthesia machine 1 It is set to be inside. That is, the force required to lock all the casters 2 is proportional to the number of casters 2, and the greater the number of casters 2, the greater the force required. On the other hand, the longer the distance from the first support shaft 75 to the lock bar 71, the greater the torque about the first support shaft 75 due to the force that pushes down the lock bar 71.

  Therefore, the distance from the first support shaft 75 to the lock bar 71 is set so that all the casters 2 can be locked if the lock bar 71 is pushed down with a force within a predetermined value regardless of the number of casters 2 disposed. Has been. In other words, when the number of casters 2 is large, the distance from the first support shaft 75 to the lock bar 71 is set long, and when the number of casters 2 is small, the first support shaft 75 is set. To the lock bar 71 is set to be short. Here, “within a predetermined value” is, for example, a value (upper limit) that does not give a heavy burden to a person even if a person repeatedly pushes down the lock bar 71, and the lock bar 71 is inadvertently lowered and the caster 2 is It is a value (lower limit) that is not locked.

  Similarly, the distance (rotation radius) from the second support shaft 84, which is the second axis, to the release bar 81 is a predetermined value depending on the number of casters 2 of the anesthesia machine 1 It is set to be inside. That is, the force required to unlock all the casters 2 is proportional to the number of casters 2, and the greater the number of casters 2, the greater the force required. On the other hand, the longer the distance from the second support shaft 84 to the release bar 81, the greater the torque about the second support shaft 84 due to the force that pushes down the release bar 81.

  For this reason, the distance from the second support shaft 84 to the release bar 81 is such that all the casters 2 can be unlocked by pushing down the release bar 81 with a force within a predetermined value regardless of the number of casters 2 arranged. Is set. That is, when the number of casters 2 is large, the distance from the second support shaft 84 to the release bar 81 is set long, and when the number of casters 2 is small, the second support shaft 84 is set. To the release bar 81 is set to be short. Here, “within a predetermined value” is, for example, a value (upper limit) that does not give a heavy burden to the person even if the person repeatedly depresses the release bar 81, and the release bar 81 is inadvertently lowered and the caster 2 is It is a value (lower limit) that cannot be unlocked.

  Here, the predetermined value of the force that pushes down the lock bar 71 and the predetermined value of the force that pushes down the release bar 81 may be the same value or different values. In this embodiment, the second support shaft 84 is disposed on the near side of the anesthesia machine 1 with respect to the first support shaft 75, and the distance from the first support shaft 75 to the lock bar 71 is the second It is set longer than the distance from the support shaft 84 to the release bar 81.

  Further, the positions of the lock bar 71 and the release bar 81 are set so that they can be easily pushed down with feet or the like and do not obstruct traffic or work. That is, as described above, the lock bar 71 and the release bar are adjusted by adjusting the arrangement position of the fourth square pipe 34 of the gantry 3 and adjusting the arrangement position of the caster lock operating mechanism 12, that is, the pedal base 6. 81 is arranged at an appropriate position.

  Further, the lock bar 71 and the release bar 81 are arranged so that the lock bar 71 in the unlocked state and the release bar 81 in the locked state are located at substantially the same position on the plane and in height. That is, the lock bar 71 and the release bar 81 are disposed so that the lock bar 71 and the release bar 81 can be pushed down at substantially the same position.

  In this way, the pedal base 6, the lock pedal 7, and the release pedal 8 are assembled, and all casters 2 are locked or unlocked simultaneously as follows.

  That is, as shown in FIG. 9, when the lock bar 71 is positioned higher and the release bar 81 is positioned lower and the lock bar 71 is pushed down by stepping on with the foot, the lock pedal 7 is moved to the first position. It rotates clockwise (forward direction) about the support shaft 75 as an axis. With this rotation, as shown in FIG. 14, the connecting bar 76 is pushed down, and the interlocking member 5 rotates clockwise (one direction) about the rotation support shaft 52. Thereby, the locking members 4 at both ends of the interlocking member 5 rotate counterclockwise (first direction) together with the horizontal shaft 22, and the casters 2 are locked. Along with the lowering of the lock bar 71 due to the rotation of the lock pedal 7, the release pedal 8 rotates clockwise (in the positive direction) about the second support shaft 84, as shown in FIG. The release bar 81 is positioned higher.

  In such a locked state, when the release bar 81 is pushed down by stepping on with a foot, the release pedal 8 rotates counterclockwise (reverse direction) about the second support shaft 84. As the lock bar 71 is raised by this rotation, the lock pedal 7 rotates counterclockwise (reverse direction) about the first support shaft 75 as shown in FIG. Thus, the connecting bar 76 is pushed up, and the interlocking member 5 rotates counterclockwise (the other direction) about the rotation support shaft 52. As a result, the lock members 4 at both ends of the interlocking member 5 rotate clockwise (second direction) together with the horizontal shaft 22, and the casters 2 are unlocked. Then, the lock bar 71 is positioned higher and the release bar 81 is positioned lower.

  As described above, according to the multiple caster lock mechanism 11, the lock member 4 and the interlocking member 5, which are movable members, are placed in the accommodation space of the gantry 3, that is, in the first square pipe 31 and the second square pipe 32. Since the gantry 3 is positioned above the casters 2 and is not exposed from the gantry 3, a wide space from the lock mechanism 11 to the installation surface (floor surface) can be secured. For this reason, it is possible to prevent / suppress obstacles and the like from hitting the lock mechanism 11, and to prevent damage to the lock member 4 and the interlocking member 5 even if the obstacles hit the mount 3. Can be suppressed. Furthermore, since the lock member 4 and the interlocking member 5 are not exposed from the gantry 3, the anesthesia machine 1 can be easily transported by a forklift or the like. In other words, it is easy to use because the need for an obstacle or the like to hit the lock mechanism 11 and the need to worry about the transport method is reduced.

  On the other hand, according to the multiple caster lock mechanism 11, since the locking member 4 and the horizontal shaft 22 are rotated by the rotation of the interlocking member 5, the transmission link is in the longitudinal direction (horizontal) as in the prior art. As compared with the case of moving in the direction), it is possible to reduce backlash at each connecting portion. That is, as shown in FIG. 25A, in the conventional lock mechanism, the support member 102 and the horizontal shaft 22 are rotated by moving the transmission link 101 in the longitudinal direction (horizontal direction). In order to rotate 22, it is necessary to provide a large backlash / gap between the shaft hole 102 a of the support member 102 and the horizontal shaft 22 in consideration of an attachment position error.

  On the other hand, according to the lock mechanism 11, the lock member 4 and the horizontal shaft 22 are rotated by rotating the interlocking member 5, so that the lock member 4 is locked as shown in FIG. There is no need to provide a large play or gap between the shaft hole 4b of the member 4 and the horizontal shaft 22. Since the backlash between the shaft hole 4b of the lock member 4 and the horizontal shaft 22 is small, smooth operation (locking and unlocking) without backlash is possible. In addition, since the interlocking member 5 and the lock member 4 are both rotated, the necessity of arranging the interlocking member 5 and the lock member 4 with high accuracy is reduced, and the manufacturing cost can be suppressed.

  In addition, since the lock member 4 is disposed in the accommodation space portion of the gantry 3 so that the height of the caster 2 can be locked and unlocked, the accommodation space portion of the gantry 3 is lowered. be able to. That is, the height of the lock mechanism 11 can be reduced, and as a result, it is possible to reduce the size, reduce the weight, and stabilize the running. On the other hand, in the conventional lock mechanism, since the support member extends vertically downward from the horizontal axis and is coupled to the transmission link, the height of the lock mechanism is increased. The height and thickness will increase, and the space to the installation surface will be reduced.

  Furthermore, since the gantry 3 is constituted by the long rectangular pipes 31 to 34, it is possible to reduce the size and weight, and to secure and utilize a wider space up to the installation surface. . For example, the space between the square pipes 31 to 34 can be utilized.

  Moreover, since the caster lock operation mechanism 12 that rotates the plurality of interlocking members 5 in the same direction is provided, the plurality of interlocking members 5 can be easily rotated in the same direction. That is, many casters 2 can be locked and unlocked easily and simultaneously.

  Further, according to the caster lock operating mechanism 12, the lock pedal 7 is arranged so as to be rotatable around the first support shaft 75 which is the first shaft center of the pedal base 6 different from the horizontal shaft 22 of the caster 2. The caster 2 is locked by pushing down the lock bar 71 of the lock pedal 7. Similarly, a release pedal 8 is disposed so as to be rotatable about a second support shaft 84 that is a second axis of the pedal base 6 that is different from the horizontal shaft 22 of the caster 2, and the release pedal 8 is released. The caster 2 is unlocked by depressing the bar 81.

  Therefore, by increasing the distance from the first support shaft 75 to the lock bar 71 and the distance from the second support shaft 84 to the release bar 81, a large torque (rotational force) can be obtained and many casters can be obtained. Even in the case of having 2, the burden on the user can be reduced. Moreover, by adjusting the positions of the first support shaft 75 and the second support shaft 84 and adjusting the mounting position of the pedal base 6 to the mount 3, the lock bar 71 and the release bar 81 are mounted on the mount 3. It can be prevented from protruding greatly from the above, and practicality and convenience can be enhanced. In this way, it is possible to appropriately and easily perform simultaneous locking and simultaneous unlocking of the casters 2 without imposing a heavy burden on the user. Moreover, since the positions of the lock bar 71 and the release bar 81 when pressed down are substantially the same position, the user can simply lock in and release the lock by simply depressing the bar 71, 81 without worrying about the position of the bar 71, 81. It is easy to use.

  Further, the distance from the first support shaft 75 to the lock bar 71 is set so that the force for pushing down the lock bar 71 falls within a predetermined value according to the total number of casters 2. For this reason, even when many casters 2 are provided, the lock bar 71 can be pushed down and locked with a force within a predetermined value, and the burden on the user can be reduced. On the other hand, since the caster 2 is not locked unless the lock bar 71 is pushed down with a force within a predetermined value, it is possible to prevent the caster 2 from being inadvertently locked.

  Similarly, the distance from the second support shaft 84 to the release bar 81 is set so that the force for pushing down the release bar 81 falls within a predetermined value according to the total number of casters 2. For this reason, even when many casters 2 are provided, it is possible to release the lock by pushing down the release bar 81 with a force within a predetermined value, thereby reducing the burden on the user. On the other hand, since the caster 2 is not unlocked unless the release bar 81 is pushed down with a force within a predetermined value, it is possible to prevent the caster 2 from being inadvertently unlocked.

  As described above, according to the caster mechanism including the plurality of caster lock mechanisms 11 and the caster lock operation mechanism 12, the plurality of casters 2 can be simultaneously locked or unlocked easily and smoothly without burdening the user. It is possible and easy to use.

  Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention. For example, in the above-described embodiment, the case where two casters 2 are simultaneously locked or unlocked by one multiple caster lock mechanism 11 has been described. However, three or more casters 2 are simultaneously locked or unlocked. May be. Similarly, the case where two interlocking members 5 (multiple caster lock mechanisms 11) are simultaneously rotated by one caster lock operating mechanism 12 has been described. However, three or more interlocking members 5 may be simultaneously rotated. Good. Further, a lock mechanism other than the plurality of caster lock mechanisms 11 may be combined with the caster lock operation mechanism 12, and a mechanism including the plurality of caster lock mechanisms 11 in the caster lock operation mechanism 12 may be used as the caster lock operation mechanism.

  Moreover, although the hollow member which comprises the mount frame 3 demonstrated the case where it was the square pipes 31-34, it should just be a hollow member which has the accommodation space part which accommodates the lock member 4 and the interlocking member 5, and a cross section is a U-shape or An L-shaped square or the like may be used as the hollow member. The caster lock operating mechanism 12 is a mechanism for rotating two parallel interlocking members 5 in the same direction. However, even when the two caster lock operating mechanisms 12 are apparently rotated opposite to each other, two caster lock mechanisms 11 are provided. Can be used as long as they are simultaneously locked or unlocked.

1 Anesthesia machine 11 Multiple caster lock mechanism 12 Caster lock operation mechanism (operation mechanism)
13 bogie 14 anesthesia machine main body 2 caster 21 wheel 22 horizontal axis 3 mount 31-34 square pipe (hollow member)
4 Locking member 5 Interlocking member 52 Rotating support shaft (axial center)
6 Pedal base (base)
7 Lock pedal (first operating body)
71 Lock bar (first operation part)
75 First spindle (first axis)
76 Connecting bar 8 Release pedal (second operating body)
81 Release bar (second operation part)
84 Second spindle (second axis)

Claims (4)

A caster lock operating mechanism for locking or unlocking a caster that is locked or unlocked by rotating a horizontal shaft that is mounted on a pedestal and disposed on a stem located on the upper side of a wheel,
A base provided with an attachment part attached to the gantry and a support part connected to the attachment part and extending horizontally ;
The support portion extends from the attachment portion side along the other open end side, and the end portion on the attachment portion side is disposed in the support portion so as to be rotatable about a first axis extending horizontally, A first operating body provided with a first operating portion on a first end side of the open end side, and connected to a horizontal shaft of the caster;
The support portion is disposed on the open end side of the support portion so as to be rotatable about a second axis that extends horizontally and is parallel to the first axis. A second operating body connected to the first end side and provided with a second operating portion on the second end side;
With
When the first operating unit is pushed down with the first operating unit at the upper level and the second operating unit at the lower level, the first operating body is rotated in the forward direction. The horizontal axis rotates in the first direction to lock the caster, the second operating body rotates in the forward direction, and the second operating portion is positioned at the upper position. When the second operating portion is pushed down, the first operating body rotates in the reverse direction as the second operating body rotates in the reverse direction, and the horizontal axis rotates in the first direction. The caster is unlocked by rotating in a second direction that is the opposite direction of the first operation unit, and the first operation unit is positioned higher.
A caster lock operating mechanism characterized by that. The distance from the first axial center to the first operation unit is set so that the force to push down the first operation unit falls within a predetermined value according to the number of casters.
The caster lock operating mechanism according to claim 1. The distance from the second axis to the second operation unit is set so that the force to push down the second operation unit falls within a predetermined value according to the number of casters.
The caster lock operating mechanism according to any one of claims 1 and 2. The first operating portion in the unlocked state of the caster and the second operating portion in the locked state of the caster are located at substantially the same position on a plane and in height.
The caster lock operating mechanism according to any one of claims 1 to 3, wherein the caster lock operating mechanism is provided.

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