JP5634212B2 - Gap adjusting device and lifting actuator adjusted by the device - Google Patents

Description

  The present invention relates to a gap adjusting device that adjusts a gap that causes backlash in a lifting table of a medical table such as a medical examination table, a medical table, or a delivery table used mainly in a hospital, and a lifting actuator adjusted by the device. .

  A plurality of techniques are known for a medical table provided with this type of gap adjuster and lifting actuator. Although not related to the lifting actuator and the medical table, as the gap adjustment tool, for example, one surface in the longitudinal direction is inclined, and the other surfaces are substantially balanced with each other when the inclined surfaces are in contact with each other. In the gap adjuster which is composed of wedge-shaped first and second adjustment pieces, and the width of the other surface side can be adjusted by changing the position of the first and second adjustment pieces in the longitudinal direction, The first and second adjustment pieces have the same shape in which a convex portion extending in the longitudinal direction is formed at an end portion of one surface, and a concave portion extending in the longitudinal direction is formed in parallel to the inside of the convex portion. In a state where they are in contact with each other, the convex portion of the first adjustment piece enters the concave portion of the second adjustment piece, and the convex portion of the second adjustment piece is located outside the first adjustment piece. And a holding structure for holding the state in which the convex portion enters the concave portion A gap adjusting device of the configuration with (see Patent Document 1).

  This gap adjuster can be used as the first or second adjustment piece only by producing either the first adjustment piece or the second adjustment piece. As a result, the gap adjuster can be configured with only one of the first and second adjustment pieces. Therefore, the productivity of the gap adjuster can be greatly improved, and the production cost of the gap adjuster can be greatly reduced.

  In addition, as a first known example of a medical table provided with a lift actuator, a transfer table on which a human body is placed, a sheet contact portion that contacts an end portion of a sheet on which the human body is placed, and the sheet contact portion A sheet sandwiching portion having a sandwiching actuator for sandwiching the sheet therebetween, and a moving actuator for applying a force for moving the sheet sandwiching portion in the longitudinal direction of the transfer table or in the direction crossing the longitudinal direction, It is a human body movement apparatus provided with the raising / lowering actuator which provides raising / lowering force to a moving stand (refer patent document 2).

  The lifting / lowering actuator in this human body moving apparatus is composed of a top plate portion, a leg portion mounting portion, a bolt, two support portions, and a motor. Specifically, the moving base itself has four pieces. It is supported by two legs of an actuator that is supported by legs and attached with a required interval in the longitudinal direction, and the two legs are attached to a leg mounting part, and the leg mounting The mounting portion is engaged with a bolt connected to the motor, and is configured to be guided in up and down movement by two support portions, and the leg can be driven via the bolt by arbitrarily driving the motor. The transfer platform is raised and lowered by raising and lowering the part mounting part.

  Further, as a second known example, a linear actuator for arranging an elevating link mechanism between a bed base on the floor side and a bed main body on the side on which a person lies, and for raising and lowering the bed main body to the elevating link mechanism The linear actuator includes an operating rod that rotates in the direction around the axis when a driving force is transmitted from a driving source, and a tip end of the operating rod that is pivotally supported. A first support portion supported by the first leg portion, and a second support portion that is screwed into a screw engraved on the operating rod and supported by the second leg portion, When providing a braking means for braking the rotation of the operating rod to the lower side when the both support portions are separated by a force not based on the driving force and receive a load in the direction of lowering the bed main body, Between the means and the first indicating part, The supporting rods are brought into contact with each other in the thrust direction when the two support portions are close to each other and receive a load in the direction of raising the bed body by a force that is not based on power, and the rotation of the working rod to the rising side is restricted. It is a linear actuator for raising and lowering a bed provided with a restriction space (see Patent Document 3).

  For example, when the bed main body is forcibly lifted, the bed raising / lowering linear actuator includes a braking means for applying braking to the rotation of the operating rod to the side so that the bed main body does not inadvertently descend. The regulation space between the support portion is closed and abuts against each other, so that the operating rod is restricted from rotating to the side, whereby the raising braking function can be imparted to the lowering braking means. Thus, the raising braking means can be dispensed with, and the bed body can be controlled up and down unintentionally up and down, but the structure is simple and the number of parts can be reduced.

Japanese Patent No. 4305666 JP 2006-223716 A JP-A-10-118132

  In the gap adjuster, the first and second adjustment pieces are always in a disjointed state, and are combined only at the time of use and installed in the gap, but the combined state is that of the first and second adjustment pieces. It is not maintained unless the required pressing force from the outside continues to be applied from the outside, and it is not held without the pressing force even at the installation or attachment position. If it does so, there exists a problem that it cannot use substantially about the fine clearance gap adjustment between the sliding instruments or sliding members like an actuator.

  In particular, a lift leg actuator for a medical table, for example, a slide leg that expands and contracts in multiple stages by fitting and combining a plurality of square cylinders of different diameters made of aluminum die casting, is made when die-casting. In addition, deformation often occurs during cooling or the degree of shrinkage is different, resulting in dimensional errors. When square cylinders are fitted and combined, the error is reduced or many types of plates with the required thickness are used. Prepared, placed, removed, replaced, and adjusted to ensure a gap for sliding, but the gap should not be a gap that causes rattling, Since the adjustment of the gap is extremely fine, it is necessary to adjust each gap between the square cylinders to be fitted and united, and the workability is extremely bad, so the problem to be solved is that productivity is bad. It is.

  In the first known example of the medical table provided with the lifting actuator, four slidable rod-shaped legs provided at the four corners between the pedestal with four wheels and the moving table, and on the pedestal Two leg portions for raising and lowering which are provided and constituting the raising and lowering actuator, a leg placing portion to which the two leg portions are attached, and two rod-shaped guides for guiding the raising and lowering of the leg placing portion. Since it is supported by the support part and the bolt for raising and lowering the leg mounting part, the overall structure is such that there is not much rattling, but the cord of the medical device is provided on the four leg parts provided at the four corners. Since the mobile platform on which the patient is placed is kept horizontal by the four legs at the four corners, the posture of the patient can be adjusted even if it can be moved up and down by the lifting actuator. Change, for example, slightly upper body from sleeping Cause is a structure that can not be changed in such a posture in which sitting on the attitude Toka chair, also has it by the problem that cause inconvenience to a variety of medical practice point.

  Further, in the second known example of the medical table provided with the lifting actuator, the bed main body is attached to the upper part of the bed base via the rod-like first leg portion and the second leg portion, and the lifting link mechanism. The height of the bed main body can be adjusted by changing the tilting position of the first leg portion, but this medical table (bed) is also maintained in a horizontal state as in the first known example. It is a structure that cannot change the shape of the bed itself, such as changing the posture of the patient on the bed body, for example, the posture of raising the body slightly from the sleeping state or the posture sitting on the chair, etc. This also has the problem of causing inconveniences in various medical practices.

  By the way, in a medical table provided with a lifting actuator, the number of supporting legs is reduced and the lifting and lowering can be performed smoothly and maintained in a stable state without causing rattling, and the shape of the medical table itself can be changed. It is desired to do so.

  Therefore, the gap adjustment device can be applied to an appliance such as a sliding actuator that slides or slides, and can be adjusted to a stable state with smooth elevation by eliminating anxiety due to rattling, and the elevation actuator The conventional medical table itself supporting the four corners of the bed body with rod-like legs eliminates the inconvenience of the medical table itself, and the medical table itself can be arbitrarily changed to perform various medical activities. There is a problem to be solved.

As a specific means for solving the above-mentioned problems, the present invention provides a gap adjusting device that is used to eliminate a backlash by attaching it to a backlash that has a backlash, and has a rectangular plate shape. The fixed member and the movable member are combined in a face-matching state via an engaging portion, and the faces to be faced are formed in a state where both are inclined at a predetermined angle, and both the inner surfaces of the inclined faces are formed. The engaging portion formed in the step is a serrated uneven portion slidable in one direction. The fixing member is provided with an overhanging portion protruding inward at the upper end portion of the fixing member, and the movable member is held on both side surfaces. Te wall section having a convex portion provided at a distal end portion in order to slidably coalesce to form a wall portion having a tapered surface on the base portion outwardly on both sides of the movable member, the inner wall portion of the fixing member The movable member is mounted on the tapered surface with the tip Protrusions abut maintained coalescence state of, and provides a clearance adjustment device being characterized in that a configuration in which the movable member can be eliminated backlash clearance to slide.

The second invention, a plurality of column diameters differ a lifting actuator used attached to the apparatus or member requiring lifting and allow expansion and contraction are sequentially accommodated in the径状, to allow the extendable characterized in that the configuration of eliminating the looseness between each other between each column that expands and contracts with intervening gap adjusting device according to the first aspect of the present invention in a gap between each column that houses (claim 1) It is to provide a lift actuator.

1st invention concerning this invention WHEREIN: The hole or notch part for pushing and sliding the said movable member with a jig | tool was provided in the overhang | projection part of the said fixing member; and the wall provided in the both sides | surfaces of the said fixing member The section includes an additional requirement that it is divided into a plurality of sections.

  In the second aspect of the present invention, the column includes an additional requirement that the column is made of aluminum die casting.

  According to the gap adjusting device according to the present invention, the fixed member and the movable member are always in a combined state, and the protruding portion of the fixed member can be attached to the object to be adjusted for the gap. It can be attached and installed in the gap of the member, moving or sliding the movable member little by little, increasing the thickness of the gap adjustment device itself, filling the gap and eliminating the backlash completely, and the material of the object in use Even if rattling occurs due to the deformation or elongation, there is an excellent effect that the rattling can be eliminated immediately by further moving or sliding the movable member.

  Further, the lifting actuator according to the present invention is configured so that it can be expanded and contracted by using a plurality of lightweight and solid aluminum die-casting columns. For example, if it is applied as an elevating actuator for a medical table, the area around the treatment table can be refreshed, and there is no rattling, so there is no patient anxiety and medical care is possible. There is an excellent effect that the inconvenience in the action can be completely eliminated.

It is a perspective view which shows the clearance gap adjustment apparatus for raising / lowering actuators concerning preferable embodiment which concerns on this invention. It is the perspective view seen from one direction which separated and showed two members which constitute the gap adjustment device concerning the embodiment. It is the perspective view seen from the other direction which separated and showed two members which constitute the crevice adjustment device concerning the embodiment. The (A) figure in the clearance gap adjustment apparatus which concerns on the embodiment is a side view, (B) figure is the side view which isolate | separated and showed two members. It is sectional drawing of only the principal part which expanded and showed the sawtooth-shaped uneven | corrugated | grooved part which the two members which comprise the clearance gap adjustment apparatus which concerns on the embodiment engage. It is sectional drawing of only the principal part which expanded and showed the sawtooth-shaped uneven | corrugated | grooved part in the state which two members in the clearance gap adjustment device engaged. It is an expanded sectional view which follows the DD line of Drawing 4 (A). It is the perspective view which notched and showed a part of raising / lowering actuator which concerns on preferable embodiment of this invention to which the clearance gap adjustment apparatus was applied. It is the perspective view which notched and showed a part in the expansion | extension state of the raising / lowering actuator. It is the expansion perspective view of only the principal part which showed the condition which attaches the clearance gap adjustment apparatus of this invention to the raising / lowering actuator. It is the perspective view which showed the upper surface side of the condition which attaches the clearance gap adjustment apparatus to the same raising / lowering actuator. It is the perspective view which separated and showed three columns, in order to demonstrate the condition which attached the clearance gap adjustment device to the raising / lowering actuator. It is explanatory drawing shown in the permeation | transmission state, in order to understand the positional relationship of the clearance adjustment apparatus in the expansion | extension state by attaching a clearance adjustment apparatus to the raising / lowering actuator. It is the perspective view which showed schematically the medical table equipped with the raising / lowering actuator. It is the side view which showed schematically the medical table equipped with the raising / lowering actuator.

  The present invention will be described based on the illustrated embodiment. 1 to 6, a preferred embodiment of the gap adjusting device 1 is composed of a fixed member 2 and a movable member 3 each having a rectangular plate shape. Used in a combined state. The fixed member 2 is integrally formed with an overhanging portion 4 projecting inward on the upper end side, and a hole or a notch portion 5 for sliding the movable member 3 with a rod-like member at a substantially central portion of the overhanging portion 4. Is provided. Further, on both side surfaces, a wall portion 6 for holding the movable member 3 and maintaining unity is integrally formed by projecting inward, and the wall portion 6 includes a plurality of incisions 7 at equal intervals. An inward convex portion 8 is formed at the tip of every other wall portion of the divided wall portions 6.

  As for the division of the wall portion 6 in this case, in the illustrated embodiment, four notches 7 are inserted to divide the wall portion 6 into five wall portions 6, and the upper and lower wall portions and the central wall portion are convex. The part 8 is formed. By dividing the wall portion 6 in this way, each of the divided wall portions can exhibit elasticity, and in particular, the wall portion 6 on which the convex portion 8 is formed is for attaching and detaching the movable member 3. In addition, a certain degree of elasticity is necessary to maintain the united state by holding the slidably. However, it is not necessary to form the convex portions 8 on all the divided wall portions 6.

  In addition, the inner surface of the fixing member 2 is formed with a thickness changed so that the upper end side is thin and the lower end side is gradually thickened. A plurality of grooves 10 for reducing friction are provided in the vertical direction on the back side.

  The movable member 3 has a size that fits inside the wall portion 6 of the fixed member 2, and is integrally formed with wall portions 11 projecting inward on both side surfaces, and the outer side of the base portion side of the wall portion 11. Is formed on the tapered surface 12 along the vertical direction. Further, the engaging portion on the inner side surface of the movable member 3 is formed in a different thickness so that the upper end side is thicker and the lower end side is gradually thinner, contrary to the inner side surface of the fixed member 2, and the entire inner side surface thereof is formed. Convex and concave portions 13 having a sawtooth cross section are formed uniformly and continuously, an overhanging portion 14 projecting inward is integrally formed on the lower end side, and a plurality of groove portions 15 for reducing friction are formed on the back side. It is provided in the vertical direction.

  In the gap adjusting device 1, as shown in FIG. 4A, the total thickness a when the fixed member 2 and the movable member 3 are combined is approximately 5.5 mm, and the fixed member 2 and the movable member 3 are combined. The thickness b of the main body portion is approximately 1.5 mm, and the inner side surfaces of both are inclined, so that the maximum thickness c of the inclined portion (the fixed member 2 is on the lower end side and the movable member 3 is on the upper end side) ) Is formed to be approximately 4 mm including the thickness b of the main body.

  As for the configuration of the engaging portion on the inner surface of the fixed member 2 and the movable member 3, as shown in FIG. 5, the inclination angle θ1 of the inner surface is formed to be approximately 3 °, and the minimum thickness d of the inclined portion is set. (The fixed member 2 is on the upper end side and the movable member 3 is on the lower end side) is formed to be approximately 2 mm including the thickness b of the main body, and the sawtooth-shaped uneven portion 9 formed on the fixed member 2 and the movable member 3. , 13, the height difference e between the peaks and valleys of the concavo-convex portion is about 0.1 mm, the inclination angle θ2 is about 69 °, and the length f of the inclined ridgeline is about 0.3 mm, Since the peaks of the concavo-convex portions are inclined in one direction as a whole, sliding movement in the inclined direction is facilitated.

  In this way, the inner surfaces of the fixed member 2 and the movable member 3 are formed in the same shape, that is, the serrated irregularities 9 and 13 that are entirely inclined from the smaller thickness of the inclined inner surface toward the larger one. Thus, in a state where both the concave and convex portions 9 and 13 are engaged and the fixed member 2 and the movable member 3 are united, as shown in FIG. It can only be moved in the direction of, and once moved, it cannot be returned in the reverse direction.

  Further, as shown in FIG. 7, when the fixed member 2 and the movable member 3 of the gap adjusting device 1 are combined, the convex portion 8 provided on the wall portion 6 of the fixed member 2 is the wall portion of the movable member 3. The united state is maintained by contacting the tapered surface 12 provided at 11, and the movable member 3 is slidable in one direction with respect to the fixed member 2.

  As a telescopic member to which the gap adjusting device 1 configured in this way can be applied, a typical lifting actuator 20 is shown in FIGS. The lift actuator 20 can be set by sliding it to an arbitrary height. For example, the lift actuator 20 is composed of three aluminum die-cast rectangular tubes (columns). The intermediate column 22 is slid on the base column 21. The upper column 23 is slidably fitted in the intermediate column 22 and stored.

  The gap adjusting device 1 adjusts the gap between the columns by attaching them in the vicinity of the four corners of the upper and lower ends of the three columns fitted and accommodated in the same diameter so as not to be loose. For example, in the basic column 21, as shown in FIGS. 10 and 11, the gap adjusting device 1 is attached to each side on both sides near the four corners inside the upper end. In this attachment, the gap adjusting device 1 is used with a minimum thickness. The gap adjusting device 1 is inserted between the base column 21 and the intermediate column 22, and the overhanging portion 4 is hooked on the upper end portion of the base column 21, so that the mounted state is obtained. When the gap adjustment is completed, the upper end portion of the gap adjusting device 1 is fixed by pressing it with an appropriate fixing means 24 such as a screw. Accordingly, since two pieces are attached to the foundation column 21 in the vicinity of the four corners, eight gap adjusting devices 1 are attached in total.

  Then, all the gap adjusting devices 1 mounted are inserted into a hole or notch 5 provided in the overhanging portion 4, for example, by inserting a rod-like jig such as a screwdriver, and the movable member 3 is pushed down little by little to adjust the gap adjusting device 1 By increasing the thickness, the gap adjusting device 1 inserted between the base column 21 and the intermediate column 22 fills the gap between the two as much as possible so that no rattling occurs.

  In the same manner as described above, between the intermediate column 22 and the upper column 23, the gap adjusting device 1 is attached to each side on both sides near the four corners inside the upper end of the intermediate column 22, and after the gap adjustment, the same It is fixed by the fixing means 24. In this way, the gap can be adjusted on the upper end side of each column, but there is a gap that causes rattling on the lower end side, so the gap adjusting device 1 is attached on the lower end side for adjusting the gap.

  When the gap adjusting device 1 is attached to the lower end side, it is necessary to prevent the sliding slide from being hindered. Therefore, the outer side of the lower end side of the intermediate column 22 and the upper column 23 is located on both sides near the four corners. It is attached to each side.

  In this attachment, the direction and direction of the gap adjusting device 1 are opposite to the attachment on the upper side. That is, the up-and-down actuator 20 is set upside down, and the overhanging portion 4 of the gap adjusting device 1 inserted between the base column 21 and the intermediate column 22 is directed toward the intermediate column 22 so that the intermediate column 22 and the upper column are aligned. 23, the protruding portions 4 of the gap adjusting device 1 to be inserted between the intermediate column 22 and the upper column 23 are inserted into the upper column 23 side, respectively. It is fixed to 23.

  Thus, as shown in FIG. 12, the gap adjusting device 1 is attached to the middle column 22 and the upper column 23 in the vicinity of the four corners outside the lower end of the column. The gap adjusting device 1 is attached to the intermediate column 22 inside the upper end portion and outside the lower end portion, and the upper column 23 is attached to the outside of the lower end portion, respectively. 20 is obtained.

  And as the raising / lowering actuator 20, as shown in FIG. 13, the gap adjusting device 1 attached to the inner side and the outer side of each column 21, 22, 23 has a difference between the upper and lower sides and the outer side. Although it is substantially the same, the gap adjusting device 1 does not collide when it is extended or contracted. For example, a plurality of limit switches are provided inside the column. As one of them, the upper column 23 is first raised by a drive mechanism (not shown) including a motor incorporated in the elevating actuator 20, and when the upper column 23 comes to a set ascending position, the raising of the upper column 23 is stopped. There are provided a limit switch for continuously raising the intermediate column 22 and a limit switch for stopping the raising of the intermediate column 22 when the intermediate column 22 reaches a set ascending position, and these switches are interlocked. Therefore, the ascending operation is continuously performed at a constant speed, and is softly stopped at the position when the main switch is turned off. Similarly, even when the vehicle is lowered, the descent operation is continuously performed at a constant speed in conjunction with the descent. In short, it is only necessary to equip a plurality of switches and control the rising and lowering operations. In addition, it is natural that the bottom plate 25 is attached to each column 21 and the top plate 26 is attached to the upper column 23 in order to attach the lift actuator 20 to a required device or bed.

  Each of the columns 21 to 23 is made of light and rigid aluminum as a material by die casting, and partly deforms at the time of mold release and cooling, or a dimensional error may occur due to a different degree of shrinkage. Although there are many cases, it is possible to adjust the gap very easily by applying the gap adjusting device 1 described above. Therefore, an aluminum column (rectangular cylinder) is used as the lifting actuator 20, and the lifting actuator 20 is If applied to a medical table, various medical practices can be performed with peace of mind.

An example medical table 30 equipped with the lifting actuator 20 is shown in FIGS.
The medical table is, for example, a bed for delivery, and basically includes an upper chassis 31 and a lower chassis 32. The upper chassis 31 has a backrest 33, a seat 34, and a pair of support legs. Part 35, auxiliary stand 36, etc. are attached, back support part 33 is attached so that reclining is possible, support leg part 35 is attached so that position change is possible, and handrails 37 etc. are provided on both sides of back support part 33. It has been. In addition, a plurality of casters 38 for movement are attached to the lower chassis 32. Note that conventional components can be applied to these components.

  Therefore, the lifting actuator 20 of the present invention is applied for connection or attachment of the upper chassis 31 and the lower chassis 32, and is disposed and installed at two locations, the front side and the rear side. A pedal-type switch 39 for operating the elevating actuator 20 is provided.

  By attaching the lift actuator 20 to the medical table in this way, the upper chassis 31 is lifted and lowered in a stable state, and there is no rattling, so there is no patient anxiety and the front and rear lift actuators 20 are individually controlled. By doing so, the upper chassis 31 can be in a horizontal or inclined state, and various inconveniences can be completely eliminated in performing medical practice.

  In the gap adjusting device according to the present invention, the fixed member and the movable member are combined so as to be slidable in one direction at the engaging portion on the inner surface where the serrated irregularities are formed. It can be widely used as a dynamic gap adjustment. In addition, the gap adjusting device is particularly suitable for adjusting the gap of a lifting actuator using a column (rectangular cylinder) that requires a sense of stability. The lifting actuator is a medical table on which various medical actions are performed. By applying to the above, since no rattling occurs, the patient is not worried, and various accidents or inconveniences in medical practice can be solved, which can be widely used in the field.

DESCRIPTION OF SYMBOLS 1 Gap adjustment apparatus 2 Fixed member 3 Movable member 4, 14 Overhang | projection part 5 Hole or notch part 6, 11 Wall part 7 Notch 8 Convex part 9, 13 Serrated uneven part 10, 15 Groove part 12 Tapered surface 20 Lifting actuator 21 Base column 22 Intermediate column 23 Upper column 24 Fixing means 25 Bottom plate 26 Top plate 30 Medical table 31 Upper chassis 32 Lower chassis 33 Backrest portion 34 Seat portion 35 Supporting leg portion 36 Auxiliary stand 37 Handrail 38 Caster

Claims (5)

A gap adjusting device used to eliminate rattling by attaching to a gap with rattling,
A fixed member and a movable member having a rectangular plate shape are combined in a face-to-face state through an engaging portion,
The surfaces to be mated are formed so that both sides are inclined at a predetermined angle,
The engaging portions formed on both inclined inner surfaces are serrated irregularities that can slide in one direction,
In addition to providing a fixed protruding portion that protrudes inward to the upper end portion of the fixing member, a wall portion having a convex portion at the tip end portion is provided to hold the movable member on both side surfaces so as to be slidable .
Forming wall portions having tapered surfaces on both sides of the movable member on the base side outside ;
A configuration in which the movable member is mounted on the inner side of the wall portion of the fixed member, the convex portion of the tip portion is in contact with the tapered surface to maintain the united state, and the movable member is slid to eliminate the play of the gap. A gap adjusting device characterized by that. The gap adjusting device according to claim 1, wherein a hole or a notch for pressing and sliding the movable member with a jig is provided in the protruding portion of the fixed member. The gap adjusting device according to claim 1, wherein wall portions provided on both side surfaces of the fixing member are divided into a plurality of portions. A lifting actuator that is used by being attached to a device or member that needs to be moved up and down so that a plurality of columns having different diameters can be sequentially accommodated and expanded and contracted.
A lifting actuator characterized in that there is no backlash between the columns that extend and contract by interposing the gap adjusting device according to claim 1 in the gap between the columns accommodated so as to be able to expand and contract . The lift actuator according to claim 4, wherein the column is made of aluminum die casting.

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