JP7456323B2 - clamp device - Google Patents

Description

The present invention relates to a clamping device for removably fixing, for example, an infusion pump or a syringe pump to a support member having a variety of different diameters.

In the medical field, infusion pumps are used to administer medicinal fluids to patients using infusion tubes, and syringe pumps are used to administer medicinal fluids in syringes to patients. When using these various infusion devices, the infusion device is fixed to an infusion stand installed at the patient's bedside. In this case, the infusion device is generally removably fixed to a pole of the infusion stand via a device stand and a clamp device.

That is, when fixing the infusion device to the pole, the clamp device disclosed in Patent Document 1, for example, can be used. This clamping device has a gripping fixed part to which the device frame is attached, a gripping sliding part that moves relative to the gripping fixed part, and also has a screw shaft that is screwed into a female threaded part provided in the gripping sliding part. are doing. With the pole placed between the gripping fixed part and the gripping sliding part, by rotating the screw shaft in the tightening direction, the gripping sliding part approaches the gripping fixed part. The pole can be held between the gripping and sliding parts.

Patent No. 6273765

By the way, in the clamp device of Patent Document 1, the distance between the gripping fixed part and the gripping sliding part can be changed steplessly according to the amount of tightening of the screw shaft, so there is an advantage that it can correspond to poles of various diameters.

However, in the clamping device of Patent Document 1, if the amount of movement of the gripping sliding portion is large, such as when changing from a small diameter pole to a large diameter pole, the number of rotation operations of the screw shaft increases. For example, if the gripping and sliding portion only needs to be moved by 1 mm, one rotation is sufficient, but if the gripping and sliding portion is to be moved by 10mm, it is necessary to rotate the gripping and sliding portion 10 times. An increase in the number of rotations of the screw shaft means that the time required for fixation becomes longer, and this can be a problem especially when an emergency is required in a medical field.

Furthermore, in the medical field, there is a demand for easy operation, but as mentioned above, when the amount of movement of the gripping slide is large, the number of rotations of the screw shaft increases, so the operation is not easy. There were some aspects that were difficult to say.

The present invention has been made in view of the above, and an object thereof is to enable a medical device to be fixed to a bar simply and in a short time.

In order to achieve the above object, a first invention provides a clamp device for removably fixing a medical device to a bar extending in the vertical direction, including a mounting portion to which the medical device is attached, and a mounting portion. a first gripping member that is integrated with a fixed gripping portion that protrudes from the bar and contacts the bar from one side in the radial direction; and a second gripping member that includes a movable gripping portion that contacts the bar from the other side in the radial direction. a first female threaded portion provided on the fixed gripping portion and having a threaded groove; and a second female threaded portion provided on the movable gripping portion so as to be located on an extension of the axis of the first female threaded portion and having a threaded groove. a first male threaded portion extending at least from the first female threaded portion to the second female threaded portion and having a thread threadedly engaged with a thread groove of the first female threaded portion; and a thread of the second female threaded portion. The screw shaft is provided with a second male threaded portion having a thread that is screwed into the groove, and a rotation operation portion for rotating the screw shaft, and by rotating the screw shaft in one direction, the screw shaft can be rotated in one direction. The direction of the thread groove of the first female thread part and the thread of the first male thread part, the thread groove of the second female thread part, and the thread direction of the first male thread part are arranged so that the first female thread part and the second female thread part are brought closer to each other. It is characterized in that the direction of the threads of the two male threaded portions is set.

According to this configuration, when the screw shaft is rotated in one direction by the rotation operation section with the bar disposed between the fixed gripping part of the first gripping member and the movable gripping part of the second gripping member, the screw shaft is rotated in one direction by the rotation operation part. The first female threaded portion and the second female threaded portion approach each other. Since the first female threaded portion is provided on the fixed gripping portion and the second female threaded portion is provided on the movable gripping portion, rotating the screw shaft in one direction is an operation of bringing the movable gripping portion closer to the fixed gripping portion. . At this time, since the first male threaded part of the screw shaft is screwed into the first female threaded part, and the second male threaded part is screwed into the second female threaded part, the movable grip when the screw shaft is rotated once is The amount of movement of the first male threaded portion is the sum of the amount of movement due to the thread pitch of the first male threaded portion and the amount of movement due to the thread pitch of the second male threaded portion. In other words, the amount of movement of the movable grip when the screw shaft is rotated once is twice that of the conventional structure, so the amount of movement of the movable grip is increased while reducing the number of rotation operations of the screw shaft. This makes it possible to quickly fix the medical device to the bar in an emergency, and also simplifies the operation by requiring fewer rotations of the screw shaft.

Incidentally, by rotating the screw shaft in the opposite direction (other direction) to the fixed gripping portion, the movable gripping portion can be separated from the fixed gripping portion, and the medical device can be removed from the bar. Since the moving amount of the movable gripping portion is large even during this removal, the clamp device can be removed from the bar by only slightly rotating the screw shaft, making it possible to reduce the risk of falling during removal.

In the second invention, the thread groove of the first female threaded portion and the thread of the first male threaded portion of the screw shaft, and the thread groove of the second female threaded portion and the thread of the second male threaded portion of the screw shaft. , is characterized by a reverse screw relationship.

According to this configuration, a structure that doubles the amount of movement of the movable grip part when the screw shaft is rotated once compared to the conventional one is achieved by forming two screw threads in opposite directions on the screw shaft, and It can be obtained with a simple configuration of providing a first female threaded portion and a second female threaded portion each having a threaded groove.

In a third aspect of the present invention, the second female threaded portion is formed of a columnar member that is elongated in a direction perpendicular to the axis of the screw shaft, and the movable grip portion is formed with an accommodation hole in which the second female threaded portion is accommodated. and a biasing member that biases the second female threaded portion in a direction away from the fixed grip portion.

According to this configuration, when the screw shaft is rotated in one direction and the bar is held between the fixed gripping part and the movable gripping part, the biasing member biases the second female threaded part in the direction away from the fixed gripping part. Therefore, loosening of the screw shaft can be suppressed.

In a fourth aspect of the present invention, the biasing member is housed in a portion of the movable gripping portion facing the fixed gripping portion, and the biasing member is in contact with an outer surface of the second female screw portion. It is characterized in that it is supported by a support plate provided at a portion of the movable gripping portion that faces the fixed gripping portion.

According to this configuration, the support plate can be attached to the movable grip after the biasing member is accommodated in the movable grip while the second female screw portion is accommodated in the accommodation portion of the movable grip. Thereby, the biasing member can be disposed between the second female threaded portion and the support plate to bias the second female threaded portion in a direction away from the fixed grip portion.

The fifth invention is characterized in that the biasing member is a leaf spring made by bending a plate material.

According to this configuration, the biasing member with a high biasing force can be made compact, so that the storage space for accommodating the biasing member can be small.

A sixth invention is characterized in that the pair of biasing members are provided symmetrically across the screw shaft.

According to this configuration, since the biasing members are provided symmetrically, the biasing force can be applied in a well-balanced manner, and the screw shaft can be rotated smoothly.

In a seventh aspect of the present invention, the mounting portion of the first gripping member is provided with a support portion that supports the proximal end side of the movable gripping portion, and the supporting portion is provided on the distal end side of the first female threaded portion of the fixed gripping portion. Preferably, the movable gripping portion on the distal end side of the second female threaded portion has a fixed abutment surface that abuts the bar, and a movable abutment surface, respectively.

According to this configuration, the first female threaded portion is located closer to the proximal end of the fixed grip than the fixed abutment surface, and the second female threaded portion is located closer to the proximal end of the movable grip than the movable contact surface. Therefore, the screw shafts screwed into them are also located on the proximal end side of the fixed gripping part and the movable gripping part. As a result, the screw shaft does not get in the way when the bar is placed between the fixed gripping part and the movable gripping part, and workability during installation is further improved.

As explained above, according to the present invention, a common screw shaft is screwed into the female threaded portion of the fixed gripping portion and the female threaded portion of the movable gripping portion, so that medical equipment can be easily attached to the bar material. And it can be fixed in a short time.

1 is a diagram showing an infusion pump attached to an infusion stand using a clamp device according to embodiment 1 of the present invention. FIG. FIG. 2 is a perspective view showing the infusion pump with the door opened, to which the clamp device is attached. FIG. 3 is a perspective view showing a state in which the device pedestal is attached to the clamp device. FIG. 7 is a perspective view showing a state in which a device pedestal according to a modification is attached to a clamp device. FIG. FIG. 3 is a plan view of the clamp device. FIG. 3 is a front view of the clamp device viewed from the tip end side of the gripping portion. FIG. 3 is an exploded perspective view of the clamp device. 8 is a sectional view taken along line IX-IX in FIG. 7. FIG. 8 is a cross-sectional view taken along line XX in FIG. 7. FIG. 4 is a diagram corresponding to FIG. 3 according to Embodiment 2 of the present invention.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Note that the following description of preferred embodiments is essentially just an example, and is not intended to limit the present invention, its applications, or its uses.

(Embodiment 1)
FIG. 1 is a view of the infusion pump 100 removably fixed to the infusion stand 200 using the clamp device 1 according to Embodiment 1 of the present invention, as seen from the front side of the infusion pump 100. The infusion pump 100 is a medical device that has been conventionally used when performing infusion therapy in medical settings, and is configured to be able to administer a medicinal solution flowing through an infusion tube 101 to a patient at a predetermined flow rate.

A door 102 is provided at the front of the infusion pump 100. As shown in FIG. 2, by opening the door 102, the middle portion of the infusion tube 101 can be inserted into the infusion pump 100 and attached to the pump mechanism 103. After the middle part of the infusion tube 101 is attached to the pump mechanism 103, the door 102 is closed, so that the middle part of the infusion tube 101 is held by the infusion pump 100.

Although FIGS. 1 and 2 show a specific shape of the infusion pump 100, this is just an example, and the structure and shape of the infusion pump 100 are not particularly limited when implementing the present invention. In addition, in the description of this embodiment, a case will be described in which the infusion pump 100 is fixed to the stand 200 using the clamp device 1. For example, a syringe pump (not shown) included in medical equipment is fixed to the stand 200. It can also be used when Furthermore, the clamp device 1 can also be used when fixing various medical devices other than the infusion pump 100 and the syringe pump to the various stands 200. In other words, the clamp device 1 can be used when fixing medical equipment that has conventionally been fixed to various stands 200 at medical sites to various stands 200.

In this embodiment, the infusion pump 100 is fixed using a device pedestal 300. The device pedestal 300 may be a member that constitutes a part of the infusion pump 100, and in this embodiment, the device pedestal 300 and the infusion pump 100 are collectively referred to as medical equipment. The device mount 300 has a thick plate shape extending in the horizontal direction from a portion fixed to the clamp device 1 . The infusion pump 100 is placed on the top surface of this device pedestal 300. A screw 301 for fixing the infusion pump 100 is provided on the device pedestal 300 so as to protrude upward. By screwing this screw 301 into a screw hole (not shown) formed at the bottom of the infusion pump 100, the infusion pump 100 can be fixed to the device pedestal 300. The structure for fixing the infusion pump 100 to the device pedestal 300 is not limited to the structure described above.

The device pedestal 300 is provided with a first recess 302 for preventing interference with the infusion tube 101. The first recess 302 is for preventing the infusion tube 101 extending downward from the infusion pump 100 from coming into contact with the device pedestal 300. In this embodiment, the infusion pump 100 is fixed as shown in FIG. In this state, the infusion tube 101 is located on the right side of the infusion pump 100, so the first recess 302 is located on the right side in FIG.

Further, as shown in FIG. 3, the device pedestal 300 is also provided with a second recess 303. The first recess 302 and the second recess 303 can be provided point-symmetrically with respect to the screw 301 as the center of symmetry. That is, if the infusion pump 100 is fixed to the device pedestal 300 with the front and back reversed from the case shown in FIG. 1, the lower side of the infusion tube 102 will be located within the second recess 303 shown in FIG. Therefore, even if the infusion pump 100 is installed with the front and back reversed, interference with the infusion tube 102 can be prevented by the second recess 303.

Further, as in the modification shown in FIG. 4, the device pedestal 400 may have a shape without a recess. This device stand 400 is also provided with a screw 401. The shape of the device pedestal 400 can be a rectangular plate, but is not limited to this shape.

The stand 200 has a cylindrical pole (bar) 201 that extends in the vertical direction. Pole 201 may be hollow or solid. Although the outer diameter of the pole 201 varies depending on the type of infusion stand 200 and the manufacturer, the clamp device 1 is basically the same. For this reason, the clamp device 1 is configured to be compatible with poles 201 having various outer diameters.

(Configuration of clamp device 1)
The specific structure of the clamp device 1 will be described below. In the description of this embodiment, the left-right direction and depth direction of the clamp device 1 will be defined as shown in each of FIGS. 3 to 10. The left-right direction of the clamp device 1 is a direction in which a fixed gripping portion 12 and a movable gripping portion 32, which will be described later, move toward and away from each other. The depth direction of the clamp device 1 corresponds to the direction in which the pole 201 is moved in and out between the fixed gripping part 12 and the movable gripping part 32. The definitions of the front-rear direction and the depth direction are only for convenience of explanation, and do not limit the posture or direction during use, and any direction may be the left-right direction or the depth direction. The clamp device 1 may have a structure in which the left and right sides are reversed. Further, the depth direction may also be referred to as the front-back direction.

The clamp device 1 includes a fixed gripping member (first gripping member) 10 to which a medical device including a device stand 300 is attached, a movable gripping member (second gripping member) 30, a screw shaft 50, and a rotation operation section. 60. The fixed side gripping member 10 has a mounting part 11 to which a medical device is attached, and a fixed gripping part 12, and the mounting part 11 and the fixed gripping part 12 are integrated, for example, by integral molding. The attachment portion 11 and the fixed grip portion 12 may be constructed as separate members and may be integrated. The infusion pump 100 may be directly attached to the attachment portion 11, and the attachment structure is not particularly limited. Further, the fixed side gripping member 10 can be made of a highly rigid member such as a metal material or a hard resin. The movable gripping member 30 can also be made of a similar material.

The attachment portion 11 has a plate shape that extends in the left-right direction and also extends in the up-down direction. As shown in FIGS. 8, 10, etc., a plurality of fastening holes 11a are formed through the mounting portion 11 in the depth direction. A screw S1 (shown in FIG. 8) for attaching the device pedestal 300 to the mounting portion 11 is inserted into each fastening hole 11a from the front side toward the back side. Each screw S1 inserted into the fastening hole 11a is screwed into a screw hole 304 formed on the side surface of the device pedestal 300. The number and position of the screws S1 can be set arbitrarily.

As shown in FIG. 9, a through hole 11b penetrating in the depth direction (thickness direction of the mounting portion 11) is formed in the vertical intermediate portion of the mounting portion 11. As shown in FIG. Furthermore, as shown in FIGS. 8 and 10, the mounting portion 11 is also formed with a shaft hole 11c that penetrates in the vertical direction. A support shaft 33 is provided on the mounting portion 11 as a support portion that supports the proximal end side of the movable gripping portion 32 . This support shaft 33 is attached so as not to separate from the attachment portion 11 while being inserted into the shaft hole 11c.

The fixed grip part 12 is a part that protrudes from the left side of the attachment part 11 toward the front side and comes into contact with the pole 201 (shown by a phantom line in FIG. 6) from one side in the radial direction. A fixed-side accommodation hole 12a is formed in the base end portion of the fixed grip portion 12 so as to extend vertically. The fixed side accommodation hole 12a has a circular horizontal cross section. Further, a screw shaft insertion hole 12b is formed in the vertically intermediate portion of the base end portion of the fixed gripping portion 12 in the left-right direction. The screw shaft insertion hole 12b communicates with a vertically intermediate portion of the fixed side accommodation hole 12a. The fixed side accommodation hole 12a is opened in the left-right direction by the screw shaft insertion hole 12b.

A fixed abutment surface 12c that comes into contact with the outer peripheral surface of the pole 201 is formed on the right side surface of the fixed grip part 12 on the distal side of the fixed side accommodation hole 12a. The fixed abutment surface 12c extends in the depth direction of the fixed grip part 12 and also extends in the vertical direction, and is formed of a bent surface such that the middle part in the depth direction of the fixed abutment surface 12c is located furthest to the left. There is.

As shown in FIG. 9, an attached portion 31 that is attached to the attachment portion 11 is provided on the proximal end side of the movable gripping member 30. The attached portion 31 is formed so as to be insertable into the through hole 11b of the attachment portion 11. A shaft hole 31a penetrating in the vertical direction is formed in the mounted portion 31 so as to coincide with a shaft hole 11c (shown in FIG. 8) of the mounting portion 11. By inserting the support shaft 33 into the shaft holes 11c and 31a from above while aligning the shaft hole 31a of the mounted part 31 with the shaft hole 11c of the mounting part 11, the base end side of the movable gripping member 30 is mounted. It is rotatably connected to the portion 11 around a support shaft 33 .

A movable-side accommodation hole 32a is formed in the base end portion of the movable gripping portion 32 so as to extend vertically. The horizontal cross section of the movable side accommodation hole 32a is circular. Further, a screw shaft insertion hole 32b is formed in the vertically intermediate portion of the base end portion of the movable gripping portion 32 in the left-right direction. The screw shaft insertion hole 32b communicates with a vertically intermediate portion of the movable side accommodation hole 32a. The screw shaft insertion hole 32b opens the movable side accommodation hole 32a in the left-right direction.

A movable contact surface 32c that comes into contact with the outer peripheral surface of the pole 201 is formed on the left side surface of the distal end side of the movable gripping portion 32. The movable contact surface 32c extends in the depth direction of the movable grip portion 32 and also extends in the vertical direction, and is formed of a curved surface such that the intermediate portion in the depth direction of the movable contact surface 32c is located furthest to the right. There is.

As shown in FIG. 10, a plurality of screw holes 32d are formed on the left side surface of the movable grip portion 32. The plurality of screw holes 32d are arranged so as to surround the left end opening of the screw shaft insertion hole 32b.

The fixed grip portion 12 is provided with a fixed side male screw portion (first male screw portion) 20. As shown in FIG. 8, the fixed side male screw portion 20 is composed of a columnar member that is long in the vertical direction, which is a direction perpendicular to the axis of the screw shaft 50. The horizontal cross section of the fixed side male screw portion 20 is circular, and therefore the fixed side male screw portion 20 is cylindrical. The outer diameter of the fixed side male screw portion 20 is set slightly smaller than the inner diameter of the fixed side housing hole 12a of the fixed grip portion 12, and the fixed side male screw portion 20 can be housed in the fixed side housing hole 12a by inserting the fixed side male screw portion 20 into the fixed side housing hole 12a from one of the vertical directions of the fixed side housing hole 12a. With the fixed side male screw portion 20 housed in the fixed side housing hole 12a, the fixed side male screw portion 20 can be rotated around the axis of the fixed side male screw portion 20 relative to the fixed grip portion 12. As shown in FIG. 9, the outer diameter of the fixed male threaded portion 20 is set smaller than the inner diameter of the screw shaft insertion hole 12b, and a gap is formed between the outer peripheral surface of the fixed male threaded portion 20 and the inner peripheral surface of the screw shaft insertion hole 12b.

As shown in FIG. 8, a screw hole 20a penetrating in the left-right direction is formed in the vertically intermediate portion of the fixed-side male threaded portion 20. A threaded groove is formed on the inner peripheral surface of this threaded hole 20a. As shown in FIG. 9, the left end and right end of the screw hole 20a are positioned within the screw shaft insertion hole 12b and can be visually recognized from the outside through the opening of the screw shaft insertion hole 12b.

The movable grip portion 32 is provided with a movable male threaded portion (second male threaded portion) 40 . The movable male threaded portion 40, like the fixed male threaded portion 20, is configured of a cylindrical member that is elongated in the vertical direction. The outer diameter of the movable male threaded portion 40 is set to be slightly smaller than the inner diameter of the movable accommodation hole 32a of the movable grip portion 32, and the movable male threaded portion 40 is inserted into the movable side accommodation hole 32a from one side in the upper and lower directions. By inserting it into the accommodation hole 32a, it can be accommodated in the movable side accommodation hole 32a. The movable male threaded portion 40 is rotatable around the axis of the movable male threaded portion 40 with respect to the movable grip portion 32 in a state where the movable male threaded portion 40 is housed in the movable accommodation hole 32a. Further, the inner diameter of the movable side accommodation hole 32a is set to be larger than the outer diameter of the movable side male threaded portion 40, and there is a space between the inner circumferential surface of the movable side accommodation hole 32a and the outer circumferential surface of the movable side male threaded portion 40. There is a gap. This gap can be set to, for example, about 0.5 mm, but is not limited to this. By forming the above-mentioned gap, the movable-side male threaded portion 40 can be moved slightly in the left-right direction inside the movable-side accommodation hole 32a.

As shown in FIG. 9, the outer diameter of the movable male threaded portion 40 is set smaller than the inner diameter of the screw shaft insertion hole 32b, and the outer circumferential surface of the movable male threaded portion 40 and the inner circumferential surface of the screw shaft insertion hole 32b. A gap is formed between them.

As shown in FIG. 8, a screw hole 40a penetrating in the left-right direction is formed in the vertically intermediate portion of the movable male threaded portion 40. A threaded groove is formed on the inner peripheral surface of this threaded hole 40a. As shown in FIG. 9, the left end and right end of the screw hole 40a are positioned within the screw shaft insertion hole 42b and can be visually recognized from the outside through the opening of the screw shaft insertion hole 42b.

Further, the axis of the screw hole 40a of the movable male threaded portion 40 is located on an extension of the axis of the screw hole 20a of the fixed male threaded portion 20. The fixed male threaded portion 20 is rotatable around an axis extending in the vertical direction, and the movable male threaded portion 40 is also rotatable around an axis extending in the vertical direction. By rotating the parts 40 separately, it becomes possible to position the axis of the screw hole 20a of the fixed side male thread part 20 and the axis of the screw hole 40a of the movable side male thread part 40 on the same straight line.

The screw shaft 50 extends at least from the screw hole 20a of the fixed side male threaded portion 20 to the screw hole 40a of the movable side male threaded portion 40. The screw shaft 50 is formed with a first male threaded portion 50a having a thread that screws into the thread groove of the screw hole 20a of the fixed side male threaded portion 20, and a second male threaded portion 50b having a thread that screws into the thread groove of the screw hole 40a of the movable side male threaded portion 40.

The first male threaded portion 50a is formed in a predetermined region on the left side of the threaded shaft 50, and the second male threaded portion 50b is formed in a predetermined region on the right side of the threaded shaft 50. A region where no thread is formed is provided between the first male threaded portion 50a and the second male threaded portion 50b in the screw shaft 50, and a region where the first male threaded portion 50a is formed is separated from this region. and a region where the second male threaded portion 50b is formed.

The right end portion of the screw shaft 50 protrudes to the right from the screw hole 40a of the movable male screw portion 40. A rotation operation section 60 for rotating the screw shaft 50 is fixed to the right end portion of the screw shaft 50. The rotation operation section 60 is made of, for example, a resin material, and is preferably a knob or the like having a larger diameter than the screw shaft 50. The rotation operation part 60 may be screwed to the metal screw shaft 50, or the right end of the metal screw shaft 50 may be insert-molded into the rotation operation part 60 to be integrated. Note that the left end portion of the screw shaft 50 may be made to protrude to the left side from the screw hole 20a of the fixed side male threaded portion 20, and the rotation operation portion 60 may be provided at this left end portion. Furthermore, the rotation operation parts 60 may be provided at both ends of the screw shaft 50.

(Direction of each thread groove and thread)
In this embodiment, one threaded shaft 50 is screwed into two threaded holes, that is, the threaded hole 20a of the fixed male threaded portion 20 and the threaded hole 40a of the movable male threaded portion 40. When the screw shaft 50 is rotated in one direction, the fixed male threaded portion 20 and the movable male threaded portion 40 can be brought relatively closer to each other, and when the screw shaft 50 is rotated in the opposite direction (the other direction), the fixed male threaded portion 20 and the movable male threaded portion 40 can be brought closer to each other. The movable male threaded portion 40 can be relatively separated. The relative movement direction of the fixed male threaded portion 20 and the movable male threaded portion 40 is the direction of the thread groove of the fixed male threaded portion 20 and the thread of the first male threaded portion 50a, and the direction of the thread groove and the first male threaded portion 50a of the movable male threaded portion 40. It can be set depending on the direction of the thread of the male threaded portion 50b.

In this embodiment, by rotating the screw shaft 50 in one direction, the fixed male threaded portion 20 and the movable male threaded portion 40 are brought closer to each other, so that the thread groove of the fixed male threaded portion 20 and the first male threaded portion 50a are The direction of the thread and the direction of the thread groove of the movable side male threaded portion 40 and the threaded direction of the second male threaded portion 50b are set. Here, the direction of the screw refers to whether it is a right-handed screw that can be tightened by turning it clockwise from the perspective of the operator, or a left-handed screw that can be tightened by turning it counterclockwise. be.

For example, the thread groove of the fixed side male thread part 20 and the thread of the first male thread part 50a of the screw shaft 50 are set in a reverse thread relationship with the thread groove of the movable side male thread part 40 and the thread of the second male thread part 50b. . Specifically, when the thread groove of the fixed side male thread part 20 and the thread of the first male thread part 50a of the screw shaft 50 are right-handed threads, the thread groove of the movable side male thread part 40 and the thread of the second male thread part 50b is left-handed thread. Moreover, when the thread groove of the fixed side male thread part 20 and the thread of the first male thread part 50a of the screw shaft 50 are left-handed threads, the thread groove of the movable side male thread part 40 and the thread of the second male thread part 50b are right-handed threads. shall be. Thereby, the stationary male threaded portion 20 and the movable male threaded portion 40 can be brought relatively close to each other simply by rotating the screw shaft 50 in one direction. On the other hand, when the screw shaft 50 is rotated in the other direction, the fixed male threaded portion 20 and the movable male threaded portion 40 can be relatively separated.

(Configuration of biasing member)
In this embodiment, as shown in FIG. 10 and the like, a biasing member 70 is provided for biasing the movable male threaded portion 40 in a direction away from the fixed grip portion 12. In this embodiment, the biasing member 70 is a leaf spring formed by bending a plate made of spring steel or the like, and is formed into a chevron shape convex to the right. The shape of the biasing member 70 is not particularly limited, and may be a curved shape or a pointed shape. By using a leaf spring, the biasing member 70 with a high biasing force can be made compact, so that the storage space for accommodating the biasing member 70 can be small. The biasing member 70 may be, for example, an elastic material such as rubber or thermoplastic elastomer, a coil spring, a disc spring, a spring washer, etc. other than a leaf spring. Further, the biasing member 70 may be formed by combining a plurality of types of elastic materials and spring materials.

Although one biasing member 70 may be provided, in this embodiment, two biasing members 70 are provided as shown in FIG. Specifically, a pair of biasing members 70 are provided symmetrically across the screw shaft 50, one biasing member 70 is positioned above the screw shaft 50, and the other biasing member 70 is positioned above the screw shaft 50. It is positioned below 50. 10 shows the biasing member 70 located above the screw shaft 50, and FIG. 9 shows the biasing member 70 located below the screw shaft 50. Therefore, the pair of biasing members 70 are spaced apart from each other by at least the outer diameter of the screw shaft 50.

The above-described screw shaft insertion hole 32b passes through the left side of the movable gripping portion 32, that is, the portion facing the fixed gripping portion 12 in the left-right direction, and the biasing member 70 is inserted into the left side of the screw shaft insertion hole 32b. It is accommodated. Furthermore, a support plate 80 extending in the vertical direction is fixed to the left side of the movable gripping part 32. As shown in FIG. 10, the support plate 80 is fastened and fixed to the movable grip part 32 by screws 81 that are screwed into screw holes 32d formed on the left side surface of the movable grip part 32, respectively. As shown in FIGS. 9 and 10, the support plate 80 is inclined with respect to the axis of the screw shaft 50 in plan view, and is further away from the fixed grip 12 toward the distal end of the movable grip 32.

As shown in FIGS. 5, 7, etc., a notch 80a is formed in the vertically intermediate portion of the support plate 80. As shown in FIGS. The screw shaft 50 can be inserted into the notch 80a. As shown in FIG. 10, the biasing member 70 located above the screw shaft 50 is arranged so that its convex portion contacts the outer surface of the movable male threaded portion 40, and in this state, the biasing member 70 The side is supported by a portion of the support plate 80 above the notch 80a. Therefore, the biasing member 70 is interposed between the outer surface of the movable male threaded portion 40 and the support plate 80, and applies a biasing force that urges the movable male threaded portion 40 to the right side. Further, as shown in FIG. 9, the biasing member 70 located below the screw shaft 50 is also supported by the portion of the support plate 80 below the notch 80a while in contact with the outer surface of the movable male threaded portion 40. Therefore, a biasing force is applied to bias the movable male threaded portion 40 to the right. Since the pair of biasing members 70 are vertically symmetrically arranged with respect to the screw shaft 50, the biasing force on the movable male threaded portion 40 can be applied in a well-balanced manner.

(How to use clamp device 1)
Next, how to use the clamp device 1 will be explained. Before fixing to the pole 201, the rotation operation part 60 is turned to make the distance between the fixed grip part 12 and the movable grip part 32 larger than the outer diameter of the pole 201. In this state, the pole 201 is placed between the fixed grip part 12 and the movable grip part 32. Thereafter, the rotation operation part 60 is turned to narrow the distance between the fixed grip part 12 and the movable grip part 32. At this time, when the rotation operation part 60 is turned, the screw shaft 50 rotates, and the first male threaded part 50a and the second male threaded part 50b formed in the screw shaft 50 rotate in the same direction in synchronization.

As shown in FIG. 9, the first male threaded part 50a is screwed into the screw hole 20a of the fixed side male threaded part 20, and the second male threaded part 50b is screwed into the screw hole 40a of the movable side male threaded part 40. Therefore, when the screw shaft 50 is rotated in one direction, a force is applied in a direction in which the fixed male threaded portion 20 and the movable male threaded portion 40 approach each other relatively. Due to this force, the movable gripping member 30 rotates around the support shaft 33 and approaches the fixed male threaded portion 20 . The amount of movement of the movable gripping portion 31 when the screw shaft 50 is rotated once is the sum of the amount of movement due to the thread pitch of the first male threaded portion 50a and the amount of movement due to the thread pitch of the second male threaded portion 50b. . In other words, the amount of movement of the movable gripping part 32 when the screw shaft 50 is rotated once is twice as much as compared to the conventional structure, so the amount of movement of the movable gripping part 32 is reduced while reducing the number of rotation operations of the screw shaft 50. will increase. This makes it possible to quickly fix the infusion pump 100 to the pole 201 in an emergency, and the number of rotations of the screw shaft 50 is reduced, making the operation easier.

As the screw shaft 50 is tightened, the biasing force of the biasing member 70 increases, and the movable male threaded portion 40 is biased in a direction away from the fixed male threaded portion 20. This prevents the screw shaft 50 from loosening.

At the time of removal, the movable gripping part 32 can be separated from the fixed gripping part 12 by rotating the screw shaft 50 in the opposite direction to when it is fixed, and the infusion pump 100 can be removed from the pole 201. Since the moving amount of the movable gripping part 32 is large even during this removal, the clamping device 1 can be removed from the pole 201 by only slightly rotating the screw shaft 50, and the risk of falling during removal can be reduced.

(Embodiment 2)
11 shows a clamp device 1 according to a second embodiment of the present invention. The clamp device 1 of the second embodiment differs in that the rotation operation unit 60 is located on the fixed side and that the movable-side gripping member 30 slides left and right relative to the fixed-side gripping member 10. In the following, the same parts as those in the first embodiment are given the same reference numerals and their explanations are omitted, and the different parts will be explained in detail.

In the second embodiment, the movable gripping member 30 is arranged on the left side. The mounting portion 11 of the fixed-side gripping member 10 is provided with a slide rail 11d extending in the left-right direction. The base end portion of the movable side gripping member 30 is formed to engage with the slide rail 11d, and in the state of being engaged with the slide rail 11d, the base end portion of the movable side gripping member 30 moves in the left-right direction with respect to the mounting portion 11 of the fixed side gripping member 10. can only be moved.

The rotation operation unit 60 may be provided on either the left or right side, but in this embodiment 2 it is provided on the right side, which is the fixed side.

When the screw shaft 50 is rotated by turning the rotation operation section 60, the movable gripping member 30 moves in the left-right direction along the slide rail 11d. Thereby, similarly to the first embodiment, it can be attached to and detached from the pole 201.

The above-described embodiments are merely illustrative in all respects and should not be interpreted in a limiting manner. Furthermore, all modifications and changes that come within the scope of equivalents of the claims are intended to be within the scope of the present invention.

As explained above, the clamp device according to the present invention can be used, for example, when an infusion pump, a syringe pump, or the like is removably fixed to a bar.

1 Clamp device 10 Fixed side gripping member (first gripping member)
11 Mounting part 12 Fixed grip part 12c Fixed contact surface 20 Fixed side male threaded part (first male threaded part)
30 Movable side gripping member (second gripping member)
32a Movable side accommodation hole 32c Movable contact surface 33 Support shaft (support part)
40 Movable side male threaded part (second male threaded part)
50 Threaded shaft 50a First male threaded portion 50b Second male threaded portion 60 Rotation operation portion 70 Biasing member 80 Support plate 100 Infusion pump (medical equipment)
201 Pole (bar material)

Claims (6)

In a clamp device for removably fixing a medical device to a vertically extending bar,
a first gripping member in which a mounting portion to which the medical device is attached and a fixed gripping portion protruding from the mounting portion and abutting the bar from one side in a radial direction;
a second gripping member having a movable gripping portion that abuts the bar material from the other side in the radial direction;
a first female threaded portion provided on the fixed gripping portion and having a threaded groove;
a second female threaded portion provided on the movable grip portion so as to be located on an extension of the axis of the first female threaded portion, and having a thread groove;
A first male threaded part that extends at least from the first female threaded part to the second female threaded part and has a thread that is threaded into the thread groove of the first female threaded part, and which is threaded into the thread groove of the second female threaded part. a screw shaft provided with a second male threaded portion having a screw thread;
and a rotation operation unit for rotating the screw shaft,
The direction of the thread groove of the first female threaded part and the thread of the first male threaded part so that the first female threaded part and the second female threaded part approach each other by rotating the screw shaft in one direction. , the direction of the thread groove of the second female threaded portion and the thread of the second male threaded portion is set ,
The second female threaded portion is configured of a columnar member that is long in a direction perpendicular to the axis of the screw shaft,
The movable gripping portion is formed with an accommodation hole in which the second female threaded portion is accommodated,
A clamp device comprising: a biasing member that biases the second female threaded portion in a direction away from the fixed gripping portion . The clamping device according to claim 1,
The thread groove of the first female threaded portion and the thread of the first male threaded portion of the screw shaft are in a reverse thread relationship. A clamping device characterized by: The clamping device according to claim 1 ,
The biasing member is housed in a portion of the movable grip that faces the fixed grip,
The clamping device is characterized in that the biasing member is supported by a support plate provided at a portion of the movable gripping portion facing the fixed gripping portion while being in contact with an outer surface of the second female threaded portion. . The clamping device according to claim 3 ,
The clamp device is characterized in that the biasing member is a leaf spring formed by bending a plate material. The clamp device according to claim 4 ,
A clamp device characterized in that the pair of biasing members are provided symmetrically across the screw shaft. The clamping device according to any one of claims 1 to 5 ,
The mounting portion of the first gripping member is provided with a support portion that supports the base end side of the movable gripping portion,
The distal end side of the first female threaded portion in the fixed gripping portion and the distal end side of the second female threaded portion in the movable gripping portion are respectively a fixed abutment surface that comes into contact with the bar material and a movable abutment surface. A clamp device comprising:

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