JP6017358B2 - Drip suspension height adjustment device - Google Patents

Description

  The present invention relates to a height adjusting device for adjusting the height of an infusion bag of an apparatus for suspending an infusion bag, such as an infusion stand and an infusion pole.

  In the conventional drip stand, as shown in FIGS. 11 and 12, a cylindrical lower rod 1 is erected vertically at the center of a pedestal 5 that can be moved by a caster or the like. An upper rod 2 having an outer diameter smaller than the inner diameter of the rod 1 is inserted into and connected to the lower rod 1. A horizontal locking bar 6 is fixed to the upper end of the upper rod 2, and the drip bag is suspended on the locking bar 6. A fixing member 3 is fixed to the lower rod 1, and a screw hole that penetrates the lower rod 1 is provided in the fixing member 3, and a knob bolt 4 is screwed into the screw hole so that the knob bolt 4 The top rod 2 is fixed to the lower rod 1 by pressing the tip of the knob bolt 4 against the upper rod 2 and tightening the knob bolt 4 (Patent Document 1).

  This conventional drip stand height adjusting device, for example, grasps the upper rod 2 with the left hand, loosens the knob bolt 4 with the right hand, adjusts the position of the upper rod 2 relative to the lower rod 1, By adjusting the total connecting length of the lower rod 1 (the length as a support), and then screwing the knob bolt 4 with the right hand and fixing the upper rod 2 with the knob bolt 4, the infusion bag suspended from the locking rod 6 Adjust the height position.

JP 2006-230479 A

  However, in this conventional drip stand height adjusting device, the knob rod 4 is fastened by the gripping force of the user and the upper rod 2 is fixed. Therefore, depending on the degree of gripping force of the user, the upper rod 2 May be insufficiently fixed, and an accident may occur in which the upper rod 2 is inadvertently lowered.

  Further, when the knob bolt 4 is loosened and tightened, there is a problem that it is difficult to operate unless the lower rod 1 is fixed so as not to move with the reverse hand of the hand that rotates the knob bolt 4. For example, with the right hand When the knob bolt 4 is operated, it is necessary to support the upper rod 2 so as not to descend with the left hand and to support the lower rod 1 so as not to move in the lateral direction. For this reason, there is a difficulty that it is difficult to adjust the height of the drip stand.

  The present invention has been made in view of such a problem, and the height can be easily adjusted without fixing the lower rod so as not to move, and the upper rod may be inadvertently lowered. It is an object of the present invention to provide a height adjusting device for a drip suspension device that does not have any.

The height adjusting device of the drip suspension device according to the present invention is:
A cylindrical first rod; and a columnar or cylindrical second rod having an outer diameter smaller than the inner diameter of the first rod and inserted into the first rod, the first rod and the second rod In the apparatus for adjusting the height of the drip suspension device, the height of which is determined by the total length of the portion of the second rod exposed to the outside from the first rod,
A housing fixed to the first rod;
A first lever stored in the housing so as to rotate about the axis of the first and second rods;
A second lever fixed to the housing;
One end is locked before KIHA Ujingu, the other end is engaged with the first lever, and a coil spring said second rod is arranged so as fitted around the front KIHA Ujingu,
Have
The second rod is formed by enlarging the inner diameter of the coil spring by sandwiching the first and second portions of the first lever and the second lever that are exposed to the outside from the housing in a direction approaching each other. Loosen the tightening against
When the clamping of the first portion and the second portion of the first lever and the second lever is released, the inner diameter of the coil spring becomes small and the coil spring tightens the second rod.

The height adjusting device of another drip suspension device according to the present invention is:
A cylindrical first rod; and a columnar or cylindrical second rod having an outer diameter smaller than the inner diameter of the first rod and inserted into the first rod, the first rod and the second rod In the apparatus for adjusting the height of the drip suspension device, the height of which is determined by the total length of the portion of the second rod exposed to the outside from the first rod,
A first housing fixed to the first rod so that the second rod is inserted;
A second housing fixed to the first housing so that the second rod is inserted;
A first lever housed in the first housing and pivoting about an axis of the first and second rods;
A second lever housed in the second housing and pivoting about an axis of the first and second rods;
A first coil spring having one end locked to the first housing and the other end locked to the first lever, and arranged to fit the second rod into the first housing;
A second coil spring having one end locked to the second housing and the other end locked to the second lever, and arranged to fit the second rod into the second housing;
Have
The first lever and the second lever of the first lever and the second lever, respectively, the first portion and the second portion exposed to the outside from the first housing and the second housing are sandwiched and rotated in a direction approaching each other, thereby rotating the first lever. Loosening the tightening to the second rod by increasing the inner diameter of the coil spring and the second coil spring;
When the clamping of the first portion and the second portion of the first lever and the second lever is released, the inner diameters of the first coil spring and the second coil spring are reduced, and the first coil spring and the second coil spring are The second rod is tightened.

In this drip suspension height adjustment device,
A portion of the first lever in the first housing has a double cylindrical shape centering on the axial centers of the first and second rods, and the first housing is a double cylinder of the first lever. It has a cylindrical first wall that partitions the space,
The portion of the second lever in the second housing has a double cylindrical shape centering on the axis of the first and second rods, and the second housing is a double cylinder of the second lever. It can comprise so that it may have the cylindrical 2nd wall which partitions off.

Also,
A pair of cylindrical fixed walls that regulate the outer surface of the first rod and the inner surface of the first rod are formed in a portion of the first housing opposite to the second housing, and the first rod The first housing is positioned on the first rod by fitting the end portions of the first housing to the pair of fixed walls.

Furthermore,
A first protrusion and a second protrusion are formed on surfaces of the first portion of the first lever and the second portion of the second lever facing each other, and the first portion and the second portion are formed. The first protrusion and the second protrusion can be in contact with each other when the two are held in a direction approaching each other.

Furthermore,
A portion of the second rod that enters the first rod is provided with an elastic plate that is in contact with the first rod through a gap between the second rod and the first rod. Can be configured.

  According to the present invention, the operator holds the first and second portions of the first lever and the second lever with the thumb and forefinger and rotates them in a direction approaching each other, whereby the first coil spring and the second coil spring are rotated. The inner diameter of the first rod spring increases and the tightening force of the second rod by the first coil spring and the second coil spring becomes weak, or the first coil spring and the second coil spring are separated from the second rod. It can move in the direction of its axis. For this reason, the position of the second rod can be easily adjusted, the total length of the first rod and the portion of the second rod exposed from the first rod is changed, and the height of the drip suspension device is adjusted. Can do. Moreover, when the hand is released from the first part and the second part and the holding is released, the first coil spring and the second coil spring are deformed in a direction in which their inner diameters are reduced by the elastic force, and the second rod is tightened. . Thereby, a 2nd rod is fixed to a height adjustment apparatus, and the position of a 2nd rod is hold | maintained at the state.

  At this time, since the second rod is fastened by the first coil spring and the second coil spring and fixed at that position, the fixed state is maintained regardless of the gripping force of the operator, and the second rod falls carelessly. Nevertheless, the height of the infusion bag is reliably maintained. Moreover, since the height position of the second rod can be adjusted simply by picking the first portion and the second portion toward each other, the height of the drip bag can be easily adjusted.

  Further, the first lever and the second lever have a double cylindrical portion, and the first housing and the second housing have a first wall and a second wall that fit the double cylindrical portion. Thus, when the first part and the second part are rotated in the directions approaching each other against the elastic force of the first coil spring and the second coil spring, the first part and the second part are smoothly rotated. Can be made.

  Furthermore, the first housing can be easily positioned with respect to the first rod by providing the first housing with a fixed wall for fitting the end of the first rod.

  Furthermore, by providing protrusions that can contact each other on the mutually opposing surfaces of the first part and the second part, excessive stress is applied to the roots of the first part and the second part, It can prevent that 1 part and 2nd part break.

  Furthermore, by providing an elastic plate interposed in the gap between the first rod and the second rod on the outer surface of the second rod, the pressure of the air inside the first rod when the second rod descends Increases and becomes a resistance against the lowering of the second rod. Therefore, when the first coil spring and the second coil spring are loosened, the second rod can be gradually lowered even when the second rod is free.

It is a perspective view which shows the height adjustment apparatus which concerns on embodiment of this invention. It is a perspective view which shows a lower housing and a 1st lever. It is a perspective view which shows an upper housing and a 2nd lever. It is a figure which shows a lower housing. It is a figure which shows a 1st lever. It is a figure which shows an upper housing. It is a perspective view which shows the method of assembling a lower housing and an upper housing. It is a perspective view which shows the usage method of a height adjustment apparatus. It is a figure which shows a height adjustment apparatus. It is a figure which shows a coil spring. It is a perspective view which shows the conventional height adjustment apparatus. It is a perspective view which shows an infusion stand.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings. FIG. 1 is a perspective view showing a height adjusting device 10 according to an embodiment of the present invention. The height adjusting device 10 is installed on the lower rod 1 and the upper rod 2 of the drip stand instead of the conventional fixing member 3 shown in FIGS. 11 and 12. The lower rod 1 is erected perpendicularly to the pedestal 5, and an infusion bag is suspended from the upper rod 2 via a locking rod 6. A lower housing (first housing) 11 of the height adjusting device 10 is fixed to the lower rod 1 so as to pass through the lower rod 1, and an upper housing (through which the upper rod 2 is inserted) is inserted into the lower housing 11. A second housing 21 is fixed. Further, the first portion of the first lever 12 is exposed to the outside from the lower housing 11, and the second portion of the second lever 22 is exposed to the outside from the upper housing 21. Then, as described later, the upper rod 2 is released from being fixed to the lower rod 1 by rotating the first portion of the first lever 12 and the second portion of the second lever 22 toward each other. And can be moved up and down.

  Next, the lower housing 11 will be described with reference to FIGS. 2 is a perspective view of the lower housing 11 including the first lever 12, and FIGS. 4A to 4D are a plan view, a front view, a right side view, a bottom view, and a bottom view of the lower housing 11, respectively. (B) and (b) are a plan view and a bottom view of the first lever 12, respectively. The lower housing 11 is provided with a hole 17 through which the upper rod 2 is inserted at the center thereof. The lower housing 11 has a cylindrical shape whose outer wall is centered on the hole 17, and is located on the upper half of the lower housing 11 surrounded by the outer wall of the lower housing 11 at a position on the circumference centered on the hole 17. The circumferential walls 14a and 14b as the first walls are formed. Between these circumferential walls 14a and 14b, a gap 14c for locking one end of a first coil spring described later is formed. And the protrusion 15a and the recessed part 16a are formed in the upper surface of the circumferential wall 14a, and the protrusion 15b and the recessed parts 16b and 16c are formed in the upper surface of the circumferential wall 14b. The inner surfaces of the circumferential walls 14a and 14b are slightly larger in diameter than the holes 17 and have an arc shape, and the thickness of the circumferential walls 14a and 14b (the distance between the inner surface and the outer surface) is constant. A part of the outer surface of the cylindrical lower housing 11 is notched in the upper half, and serves as an opening window 19 for rotating a first lever 12 described later. On the other hand, a pair of arc-shaped fixed walls 10 are erected on the lower surface 31 of the lower housing 11 so as to surround the hole 17, and a recess having a constant width is provided between the lower surface 31 and the fixed wall 30. It has become. The gap between the lower surface 31 and the fixed wall 30 extends circumferentially, and the inner diameter, outer diameter, and width of the gap are dimensions corresponding to the inner diameter, outer diameter, and thickness of the lower rod 1, respectively. have. For this reason, the lower housing 11 can be positioned with respect to the lower rod 1 by fitting the upper end portion of the lower rod 1 into the circumferential gap between the fixed wall 30 and the lower surface 31. Then, by screwing a screw (not shown) into a screw hole 32 provided in the lower peripheral surface of the lower housing 11, the lower rod 1 positioned by the fixed wall 30 is tightened with the screw. 11 is fixed to the lower rod 1.

  In the first lever 12, a portion 13 in the lower housing 11 has a double cylindrical shape, and a first portion exposed from the lower housing 11 has a blade shape (blade 12a). The double cylindrical portion 13 is formed by concentrically extending an outer cylindrical portion 13a and an inner cylindrical portion 13b having a smaller diameter than the outer cylindrical portion 13a, and the outer cylindrical portion 13a and the inner cylindrical portion 13a. The part 13b is connected by a connecting part 13c. Then, the double cylindrical portion 13 of the first lever 12 is moved so that the circumferential walls 14a and 14b of the lower housing 11 enter the gap 18 between the inner cylindrical portion 13b and the outer cylindrical portion 13a of the first lever 12. It fits into the upper half of the lower housing 11. Then, the first lever 12 rotates smoothly around the center of the hole 17 because the outer cylinder portion 13 a and the inner cylinder portion 13 b rotate while being guided by the circumferential walls 14 a and 14 b of the lower housing 11. The first portion exposed from the lower housing 11 of the first lever 12 is a blade 12a, and a protrusion 42 is formed on a surface of the blade 12a facing a blade 22a described later, which is opposite to the facing surface. Concavities and convexities 41 are formed on the side surface to prevent finger sliding. A pair of walls 13e that open toward the center of the hole 17 is formed on the lower surface of the connecting portion 13c that connects the inner cylinder portion 13b and the outer cylinder portion 13a of the first lever 12, and a gap between the walls 13e is formed. A gap 13d for locking the other end of the coil spring 50 is formed.

  Next, the upper housing 21 will be described with reference to FIGS. 3, 5, and 6. 3A is a perspective view of the upper housing 21 as viewed from below, FIG. 3B is a perspective view of the second lever 22 as viewed from below, FIG. 6A is a bottom view of the upper housing 21, and FIG. 6B is a left side view of FIG. 6A, FIG. 6C is a front view of FIG. 6A, and FIG. 6D is a plan view of the upper housing 21. 3 and 6 are drawings when the upper housing 21 is placed upside down on a desk, FIG. 3 is a perspective view thereof, FIG. 6A is a plan view, and FIG. 6D is a bottom view. FIG. The structures of the upper housing 21 and the second lever 22 are basically the same as the structures of the lower housing 11 and the first lever 12. The upper housing 21 is also provided with a hole 27 through which the upper rod 2 is inserted at the center thereof. The outer wall of the upper housing 21 has a cylindrical shape centered on the hole 27, and the upper half of the upper housing 21 surrounded by the outer wall of the upper housing 21 (the upper half in FIGS. 3 and 6: actually In the lower half portion, circumferential walls 24 a and 24 b as second walls are formed at positions on the circumference around the hole 27. Between these circumferential walls 24a and 24b, a gap 24c for locking one end of a second coil spring described later is formed. On the other hand, the upper housing has a recess 25a and a through hole 26a formed on the upper surface of the circumferential wall 24a, and a recess 25b and through holes 126b and 26c formed on the upper surface of the circumferential wall 24b. Different from the housing 11. As shown in FIG. 7, when the upper housing 21 is stacked on the lower housing 11 with the surface on which the concave portions 25 a, 25 b and the through holes 26 a, 26 b, 26 c are formed facing down, This is because the protrusions 15 a and 15 b of the lower housing 11 are fitted into the recesses 25 a and 25 b of the upper housing 21 so that the positional relationship between the upper housing 21 and the lower housing 11 is defined. At this time, these recesses and through holes are formed so that the positions of the recesses 16a, 16b, and 16c of the lower housing 11 and the positions of the through holes 26a, 26b, and 26c of the upper housing 21 are aligned. Yes. Accordingly, as shown in FIG. 7, the screw 63 is inserted through the through holes 26a, 26b, 26c of the upper housing 21 to reach the recesses 16a, 16b, 16c of the lower housing 11, and the screw 63 is inserted into the recesses 16a, 16b. , 16c, the upper housing 21 and the lower housing 11 can be fixed to each other.

  Also in the upper housing 21, the inner surfaces of the circumferential walls 24 a and 24 b are slightly larger in diameter than the holes 27 and have an arc shape, and the thickness of the circumferential walls 24 a and 24 b (the distance between the inner surface and the outer surface) is constant. It is. A part of the outer surface of the cylindrical upper housing 21 is notched in the upper half (actually the lower half), and serves as an opening window 29 for turning a second lever 22 described later. On the other hand, holes 62 through which the screws 63 are inserted are formed on the lower surface 64 (actually the upper surface) of the upper housing 21 at three equal positions surrounding the holes 27.

  In the second lever 22, the portion 23 in the upper housing 21 has a double cylindrical shape, and the second portion exposed from the upper housing 21 has a blade shape (blade 22 a). The double cylindrical portion 23 is formed by concentrically extending an outer cylindrical portion 23a and an inner cylindrical portion 23b having a smaller diameter than the outer cylindrical portion 23a, and the outer cylindrical portion 23a and the inner cylindrical portion 23a. The part 23b is connected by a connecting part 23c. Then, the double cylindrical portion 23 of the second lever 22 is moved so that the circumferential walls 24 a and 24 b of the upper housing 21 enter the gap 28 between the inner cylinder portion 23 b and the outer cylinder portion 23 a of the second lever 22. The upper housing 21 is fitted into the upper half (actually the lower half). Then, the second lever 22 rotates smoothly around the center of the hole 27 because the outer cylinder portion 23a and the inner cylinder portion 23b are guided by the circumferential walls 24a and 24b of the upper housing 21 and rotate. The second portion exposed from the upper housing 21 of the second lever 22 is a blade 22a. A protrusion 44 is formed on the surface of the blade 22a that faces the blade 12a. Concave and convex portions 43 are formed on the surface to prevent the finger from sliding. On the lower surface of the connecting portion 23c that connects the inner cylinder portion 23b and the outer cylinder portion 23a of the second lever 22, as with the first lever 12, a pair of walls 23e that open toward the center of the hole 27 (see FIG. 27), and a gap 23d for locking the other end of the coil spring 51 is formed between the walls 23e.

  10A is a plan view of the coil springs 50 and 51, and FIG. 10B is a front view of the coil spring 50 (51). As shown in FIG. 10, both ends 52 and 53 of the coil springs 50 and 51 are bent perpendicular to the coil axis direction and outward in the radial direction of the coil.

  FIG. 7 is a perspective view showing a method for assembling the upper housing 21 and the lower housing 11. First, the coil spring 50 is disposed inside the lower housing 11 surrounded by the circumferential walls 14a and 14b, with the lower end 52 of the coil spring 50 locked in the gap 14c between the circumferential walls 14a and 14b. Then, the first lever 12 is housed in the lower housing 11 such that the upper end 53 of the coil spring 50 is fitted into the gap 13d between the pair of walls 13e formed on the lower surface thereof. That is, the circumferential walls 14a and 14b of the lower housing 11 are fitted into the gap 18 between the outer cylinder portion 13a and the inner cylinder portion 13b of the first lever 12, and the first lever 12 is fitted into the lower housing 11. Include. On the other hand, the coil spring 51 and the second lever 22 are similarly stored in the upper housing 21. In this case, the upper end 53 of the coil spring 51 is locked in the gap 24 c between the circumferential walls 24 a and 24 b of the upper housing 21, and the lower end 52 of the coil spring 51 is connected to the pair of walls of the second lever 22. It is locked in the gap 23d between 23e. Further, the circumferential walls 24 a and 24 b of the upper housing 21 are fitted in the gap 28 between the outer cylinder portion 23 a and the inner cylinder portion 23 b of the second lever 22.

  In this state, the upper housing 21 is overlaid on the lower housing 11. In this case, the blade portion 12a of the first lever 12 and the blade portion 22a of the second lever 22 are respectively inserted through the opening window 19 of the lower housing 11 and the opening window 29 of the upper housing 21 and exposed to the outside of the housing. . Further, the concave portions 25 a and 25 b of the upper housing 21 are fitted into the convex portions 15 a and 15 b of the lower housing 11. Then, the hole 62 provided in the lower surface 64 (actually the upper surface) of the upper housing 21 becomes the through holes 26a, 26b, and 26c in the upper housing 21, and is aligned with the recesses 16a, 16b, and 16c of the lower housing 11. Therefore, the screw 63 is inserted into the hole 62, the through hole 26a, and the like, and the tip of the screw 63 is screwed into the recess 16a of the lower housing 11. Thereby, the upper housing 21 and the lower housing 11 are connected and fixed to each other.

  As a result, as shown in FIGS. 8 and 9, the lower housing 11 and the upper housing 21 are integrally assembled, and the first lever 12 and the second lever 22 are grasped with two fingers and approach each other. By rotating in the direction, the diameters of the coil springs 50 and 51 can be changed.

  Next, the lower housing 11 is fixed to the lower rod 1 by fitting the upper end of the lower rod 1 to the fixed wall 30 of the lower housing 11, screwing the screw into the screw hole 32, and tightening this screw. . Then, as shown in FIG. 1, the upper rod 2 is inserted into the hole 27 of the upper housing 21, and further inserted into the lower rod 1 fixed to the lower housing 11. At this time, as shown in FIG. 8, the first lever 12 and the second lever 22 are held in the approaching direction. After the upper rod 2 is inserted into the upper housing 21, when the holding of the first lever 12 and the second lever 22 is loosened, the upper rod 2 is fixed to the upper housing 21 and the lower housing 11.

  As shown in FIG. 7, the coil spring 50 stored in the lower housing 11 and the coil spring 51 stored in the upper housing 21 are springs having the same shape and structure. In the case of the illustrated example, the coil springs 50 and 51 are of a type that is piled upward when the wire is wound spirally by rotating clockwise. At this time, when the first lever 12 is rotated toward the second lever 22 as shown in FIG. 8, the upper end 53 of the coil spring 50 locked to the first lever 12 as shown in FIG. Moves in the direction of expanding the coil spring 50, and the diameter of the coil spring 50 increases. On the other hand, when the second lever 22 is rotated toward the first lever 12, the lower end portion 52 of the coil spring 51 locked to the second lever 22 moves in the direction of expanding the coil spring 51, as shown in FIG. 7. However, the diameter of the coil spring 51 is enlarged. Therefore, as shown in FIG. 8, when the first lever 12 and the second lever 22 are rotated in the approaching direction, the diameters of the coil springs 50 and 51 are enlarged, and the upper rod 2 is tightened loosely by the coil springs 50 and 51. Or the upper rod 2 is opened.

  Next, the operation of the height adjusting apparatus of the present embodiment configured as described above will be described. As shown in FIG. 8, the first lever 12 and the second lever 22 are picked and rotated in directions approaching each other. In this state, as shown in FIG. 1, the upper end of the lower rod 1 is fitted to the fixed wall 30 on the lower surface of the lower housing 1, and the upper end of the lower rod 1 is connected to the lower housing 11 through the screw hole 32. Screw on to. Therefore, the lower rod 1 is externally fitted to the fixed wall 30 shown in FIG. 4D, and is positioned in a state where the inner surface of the lower rod 1 is in contact with the outer surface of the fixed wall 30. Therefore, the hole 17 and the hole 27 are smaller than the inner diameter of the lower rod 1, and the upper rod 2 inserted into the hole 27 and the hole 17 is inserted into the lower rod 1. In this state, the height of the drip stand is adjusted by adjusting the length of the portion where the upper rod 2 is exposed from the lower rod 1. Then, the fingers are separated from the first lever 12 and the second lever 22, thereby freeing the first lever 12 and the second lever 22. Then, the coil springs 50 and 51 return to their original shapes and structures due to their elastic force, the inner diameters of the coil springs 50 and 51 are reduced, and the inner surfaces of the coil springs 50 and 51 tighten the upper rod 2. Since the coil springs 50 and 51 are stored in the lower housing 11 and the upper housing 21, the upper rod 2 fastened to the coil springs 50 and 51 is fixed to the upper housing 21 and the lower housing 11.

  Then, when changing the height of the drip stand, that is, the height position of the drip bag, the operator holds the first lever 12 and the second lever 22 with fingers as shown in FIG. As shown, the first lever 12 and the second lever 22 are rotated in directions approaching each other. Then, the inner diameters of the coil spring 50 and the coil spring 51 are increased, the tightening force of the upper rod 2 by the coil spring 50 and the coil spring 51 is weakened, or the coil spring 50 and the coil spring 51 are separated from the upper rod 2, so 1 can move in the axial direction. For this reason, the position of the upper rod 2 can be easily adjusted, the total length of the lower rod 1 and the portion of the upper rod 2 exposed from the lower rod 1 is changed, and the height of the drip stand can be adjusted. . In this way, the height position of the upper rod 2 can be adjusted simply by picking the first portion 12a of the first lever 12 and the second portion 22a of the second lever 22 in a direction approaching each other. It is easy to adjust the height.

  As described above, as shown in FIG. 7, the first coil spring 50 and the second coil spring 51 rotate in a direction in which the first portion 12a of the first lever 12 and the second portion 22a of the second lever 22 approach each other. By doing so, the spring is elastically deformed so that its spring diameter is increased. As described above, the upper end portion 53 of the first coil spring 50 is locked in the gap 13d (see FIG. 5B) between the walls 13e of the first lever 12, and the lower end portion 52 of the second coil spring 51 is When the first lever 12 and the second lever 22 are rotated in the direction approaching each other by being locked in the gap 23d between the walls 23e of the two levers 22, the first coil spring 50 and the second coil spring 51 are This can be realized by elastically deforming so that the coil diameter increases. Therefore, the first coil spring 50 and the second coil spring 51 are wound in the same direction along the central axis. For this reason, the first coil spring 50 and the second coil spring 51 perform the same operation (coil diameter enlargement) by rotating the first lever 12 and the second lever 22 in a direction approaching each other, and the upper rod 2. Release the tightening force.

  When the fingers are released from the first portion 12a of the first lever 12 and the second portion 22a of the second lever 22 to release the pinching, the inner diameters of the coil spring 50 and the coil spring 51 are reduced by the elastic force. It deforms in the direction and returns to its original shape and structure, and the upper rod 2 is tightened. Thereby, the upper rod 2 is fixed to the upper housing 21 and the lower housing 11 of the drip stand, and the position of the upper rod 2 is maintained in that state. When the upper rod 2 is fastened and fixed by the first coil spring 50 and the second coil spring 51, the shaft is attached to the upper rod 2 via the locking rod 6 (see FIG. 12) or the like that hangs the drip bag. Even if a stress is about to act in the direction of rotation around the center, either one of the first coil spring 50 and the second coil spring 51 tightening the upper rod 2 has a frictional force with the peripheral surface of the upper rod 2. Due to this, the coil is deformed in the direction of decreasing the diameter, and this coil further tightens the upper rod 2, so that the upper rod 2 is subjected to a stress that prevents its rotation, and the rotation of the upper rod 2 and the drip bag is prevented. The That is, the first coil spring 50 and the second coil spring 51 are both coil springs that rotate in the same direction. For example, as shown in FIG. 7, the lower first coil spring 50 and the upper second coil spring 51 are wound in a cylindrical shape while rotating counterclockwise from below to above. The lower first coil spring 50 is fixed with its lower end 52 locked in the gap 14c, and the upper second coil spring 51 is fixed with its upper end 53 locked in the gap 24c. For this reason, if a clockwise rotational stress acts on the upper rod 2, the upper coil spring 51 that is in contact with and tightens the peripheral surface of the upper rod 2 has a lower end 52 at the second lever 22. At the same time, due to the frictional force, stress is applied in the clockwise direction, the coil diameter is reduced, and the second coil spring 51 tries to tighten the upper rod 2. For this reason, the upper rod 2 does not rotate even if rotational stress acts on the locking rod 6. In this case, the tightening force of the upper rod 2 by the lower first coil spring 50 is such that when a frictional force in the clockwise direction is applied to the first coil spring 50, the upper end portion 53 tends to rotate in the clockwise direction. The coil diameter of 50 tends to increase, and the tightening force of the first coil spring 50 against the upper rod 2 is relaxed.

  At this time, since the upper rod 2 is clamped by the coil spring 50 and the coil spring 51 and fixed at that position, the fixed state is maintained regardless of the gripping force of the operator, and the upper rod 2 is not carelessly dropped. And the drip bag height is reliably maintained.

  In addition, the first lever 12 and the second lever 22 have a double cylindrical portion, and the lower housing 11 and the upper housing 21 have circumferential walls 14a and 14b and a circumferential wall in which the double cylindrical portion is fitted. When the first lever 12 and the second lever 22 are rotated in the directions approaching each other against the elastic force of the coil spring 50 and the coil spring 51, the first lever 12 and the second lever 22 are provided. 2 lever 22 can be smoothly rotated.

  Furthermore, the lower housing 11 can be easily positioned with respect to the lower rod 1 by providing the lower housing 11 with the fixed wall 30 that fits the end of the lower rod 1.

  And in this embodiment, as shown in FIG. 8, the protrusion which can contact | abut on the mutually opposing surface of the 1st part 12a of the 1st lever 12 and the 2nd part 22a of the 2nd lever 22 mutually. 42 and 44 are provided, so that even if the operator holds the first portion 12a and the second portion 22a with an excessive force, an excessive stress is applied to the roots of the first portion 12a and the second portion 22a. The first portion 12a and the second portion 22a can be prevented from being broken. Moreover, since the unevenness | corrugation 43,45 is formed in the surface which a finger contacts in the 1st part 12a and the 2nd part 22a, a finger slips when pinching the 1st part 12a and the 2nd part 22a. There is nothing.

  The upper rod 2 is inserted into the lower rod 1 and moves up and down in the lower rod 1. Therefore, by providing this elastic plate on the outer peripheral surface of the lower rod 1 so that the elastic plate is interposed in the gap between the lower rod 1 and the upper rod 2, when the upper rod 2 is lowered, the lower rod The pressure of the air inside 1 increases, and a resistance force can be applied to the lowering of the upper rod 2. Thereby, when the coil spring 50 and the coil spring 51 are loosened, the upper rod 2 can be gradually lowered without the upper rod 2 dropping suddenly even when the upper rod 2 is free. In this manner, by providing a damper to prevent a sudden drop, the operator does not need to support the upper rod 2 when adjusting the height of the drip stand. And it is only necessary to pick the second portion 22a, and one-handed operation is possible. The configuration for preventing the sudden drop can also be configured as described in Patent Document 1.

  The present invention is not limited to the drip stand in which the lower rod 1 is erected on the base portion 5 that is moved by the caster, but the lower portion 1 that is supported by the bed or the wheelchair by inserting the lower rod 1 into the tube support portion of the bed. The height adjusting device of the present invention can also be installed on the drip pole provided with the rod 1 and the upper rod 2.

  The present invention makes it easy to adjust the height of the infusion bag, prevents the infusion height from inadvertently dropping, and reliably maintains the infusion height regardless of the gripping force of the operator. Therefore, it is extremely useful for infusion work in a hospital or a care facility.

1: Lower rod 2: Upper rod 11: Lower housing 12: First lever 13a, 23a: Outer cylinder part 13b, 23b: Inner cylinder part 14a, 14b, 24a, 24b: Circumferential wall 21: Upper housing 22: Second lever 50, 51: Coil spring

Claims (6)

A cylindrical first rod; and a columnar or cylindrical second rod having an outer diameter smaller than the inner diameter of the first rod and inserted into the first rod, the first rod and the second rod In the apparatus for adjusting the height of the drip suspension device, the height of which is determined by the total length of the portion of the second rod exposed to the outside from the first rod,
A housing fixed to the first rod;
A first lever stored in the housing so as to rotate about the axis of the first and second rods;
A second lever fixed to the housing;
One end is locked before KIHA Ujingu, the other end is engaged with the first lever, and a coil spring said second rod is arranged so as fitted around the front KIHA Ujingu,
Have
The second rod is formed by enlarging the inner diameter of the coil spring by sandwiching the first and second portions of the first lever and the second lever that are exposed to the outside from the housing in a direction approaching each other. Loosen the tightening against
The drip suspension characterized in that the inner diameter of the coil spring is reduced and the coil spring tightens the second rod when the holding of the first portion and the second portion of the first lever and the second lever is released. Device height adjustment device. A cylindrical first rod; and a columnar or cylindrical second rod having an outer diameter smaller than the inner diameter of the first rod and inserted into the first rod, the first rod and the second rod In the apparatus for adjusting the height of the drip suspension device, the height of which is determined by the total length of the portion of the second rod exposed to the outside from the first rod,
A first housing fixed to the first rod so that the second rod is inserted;
A second housing fixed to the first housing so that the second rod is inserted;
A first lever housed in the first housing and pivoting about an axis of the first and second rods;
A second lever housed in the second housing and pivoting about an axis of the first and second rods;
A first coil spring having one end locked to the first housing and the other end locked to the first lever, and arranged to fit the second rod into the first housing;
A second coil spring having one end locked to the second housing and the other end locked to the second lever, and arranged to fit the second rod into the second housing;
Have
The first lever and the second lever of the first lever and the second lever, respectively, the first portion and the second portion exposed to the outside from the first housing and the second housing are sandwiched and rotated in a direction approaching each other, thereby rotating the first lever. Loosening the tightening to the second rod by increasing the inner diameter of the coil spring and the second coil spring;
When the clamping of the first portion and the second portion of the first lever and the second lever is released, the inner diameters of the first coil spring and the second coil spring are reduced, and the first coil spring and the second coil spring are A drip suspension device height adjusting device, wherein the second rod is tightened. A portion of the first lever in the first housing has a double cylindrical shape centering on the axial centers of the first and second rods, and the first housing is a double cylinder of the first lever. It has a cylindrical first wall that partitions the space,
The portion of the second lever in the second housing has a double cylindrical shape centering on the axis of the first and second rods, and the second housing is a double cylinder of the second lever. The height adjusting device of the drip suspension device according to claim 2, further comprising a cylindrical second wall that partitions the space. A pair of cylindrical fixed walls that regulate the outer surface of the first rod and the inner surface of the first rod are formed in a portion of the first housing opposite to the second housing, and the first rod 4. The drip suspension height adjusting device according to claim 2, wherein an end of the drip suspension device is fitted to the pair of fixed walls and the first housing is positioned on the first rod. 5. . A first protrusion and a second protrusion are formed on surfaces of the first portion of the first lever and the second portion of the second lever facing each other, and the first portion and the second portion are formed. The height of the drip suspension device according to any one of claims 2 to 4, wherein the first protrusion and the second protrusion abut each other when the two are held in a direction approaching each other. Adjusting device. The portion of the second rod that enters the first rod is provided with an elastic plate that is in contact with the first rod through a gap between the second rod and the first rod. The height adjusting device for a drip suspension device according to any one of claims 2 to 5.

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