WO2022025199A1

WO2022025199A1 - Clamp device

Info

Publication number: WO2022025199A1
Application number: PCT/JP2021/028139
Authority: WO
Inventors: 伸治伏喜
Original assignee: 株式会社ジェイ・エム・エス
Priority date: 2020-07-29
Filing date: 2021-07-29
Publication date: 2022-02-03
Also published as: JP7456323B2; JP2022025438A

Abstract

A stationary gripping part 12 and a movable gripping part 32 are provided respectively with a first internal threaded portion and a second internal threaded portion. A threaded shaft 50 is provided with a first external threaded portion 50a that screws into the first internal threaded portion, and a second external threaded portion 50b that screws into the second internal threaded portion. The thread directions are set such that the stationary gripping part 12 and the movable gripping part 32 approach each other when the threaded shaft 50 is rotated.

Description

Clamping device

The present invention relates to a clamp device for detachably fixing, for example, an infusion pump, a syringe pump, or the like to support members having various different diameters.

In the medical field, an infusion pump for administering a drug solution to a patient using an infusion tube, a syringe pump for administering the drug solution in a syringe to a patient, and the like are used. When these various infusion devices are used, the infusion device is fixed to the infusion stand installed on the bedside of the patient. At this time, the infusion device is held by the infusion stand via the device mount and the clamp device. Generally, it is detachably fixed to the pole.

That is, when fixing the infusion device to the pole, for example, the clamp device disclosed in Patent Document 1 can be used. This clamp device has a grip fixing portion to which a device mount is attached and a grip sliding portion that moves with respect to the grip fixing portion, and also has a screw shaft that is screwed into a female screw portion provided in the grip sliding portion. is doing. With the pole placed between the grip fixing portion and the grip sliding portion, the grip sliding portion approaches the grip fixing portion by rotating the screw shaft in the tightening direction, whereby the grip fixing portion and the grip fixing portion The pole can be sandwiched between the grip and sliding parts.

Japanese Patent No. 6273765

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

However, in the clamp device of Patent Document 1, if the amount of movement of the gripping sliding portion is large, for example, when replacing a pole with a small diameter with a pole having a large diameter, the number of rotation operations of the screw shaft increases. For example, when the gripping sliding portion needs to be moved by 1 mm, the operation of one rotation is sufficient, but when the gripping sliding portion is to be moved by 10 mm, it is necessary to rotate the gripping sliding portion by 10 rotations. The increase in the number of rotation operations of the screw shaft means that the time required for fixing is prolonged, which can be a problem especially when an emergency is required in the medical field.

In addition, there is a demand for easy operation itself in the medical field, but as mentioned above, when the amount of movement of the gripping sliding part is large, the number of rotation operations of the screw shaft increases, so the operation is easy. It was hard to say that there was one.

The present invention has been made in view of this point, and an object thereof is to make it possible to easily and quickly fix a medical device to a bar material.

In order to achieve the above object, the present disclosure is a clamping device for detachably fixing a medical device to a bar extending in the vertical direction, in which a mounting portion to which the medical device is mounted and a mounting portion protruding from the mounting portion. A first gripping member in which a fixed gripping portion that abuts on the rod material from one radial direction is integrated, and a second gripping member having a movable gripping portion that abuts on the rod material from the other side in the radial direction. , A first female threaded portion provided in the fixed grip portion and having a thread groove, and a second female threaded portion provided in the movable grip portion so as to be located on an extension of the axis of the first female threaded portion and having a threaded groove. In the first male threaded portion having a thread extending from at least the first female threaded portion to reach the second female threaded portion and screwing into the threaded groove of the first female threaded portion, and in the threaded groove of the second female threaded portion. The first screw shaft is provided with a screw shaft provided with a second male screw portion having a screw thread to be screwed, and a rotation operation portion for rotating the screw shaft, and the screw shaft is rotated in one direction. The direction of the thread groove of the first female threaded portion and the thread of the first male threaded portion, the threaded groove of the second female threaded portion, and the second male thread so that the female threaded portion and the second female threaded portion are brought close to each other. The direction of the thread of the part is set.

According to this configuration, when the screw shaft is rotated in one direction by the rotation operation portion in a state where the bar member is arranged between the fixed grip portion of the first grip member and the movable grip portion of the second grip member, the first The 1-female threaded portion and the 2nd female-threaded portion are close to each other. Since the first female screw portion is provided in the fixed grip portion and the second female screw portion is provided in the movable grip portion, the rotation operation of the screw shaft in one direction is an operation of bringing the movable grip portion closer to the fixed grip portion. .. At this time, since the first male threaded portion of the screw shaft is screwed into the first female threaded portion and the second male threaded portion is screwed into the second female threaded portion, the movable grip when the screw shaft is rotated once. The amount of movement of the portion is the sum of the amount of movement of the first male screw portion due to the screw pitch and the amount of movement of the second male screw portion due to the screw pitch. That is, since the amount of movement of the movable grip portion when the screw shaft is rotated once is doubled as compared with the conventional structure, the amount of movement of the movable grip portion 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 the number of rotation operations of the screw shaft is small, which simplifies the operation.

The movable grip portion can be separated from the fixed grip portion by rotating the screw shaft in the opposite direction (other direction) from the fixed grip portion, and the medical device can be removed from the bar material. Since the amount of movement of the movable grip portion is large even during this removal, the clamp device can be removed from the bar material by simply rotating the screw shaft a little, and the risk of falling during removal can be reduced.

Further, the thread of the first female threaded portion and the first male threaded portion of the threaded shaft, and the threaded groove of the second female threaded portion and the thread of the second male threaded portion of the threaded shaft are reverse threads. It may be a relationship.

According to this configuration, a structure that doubles the amount of movement of the movable grip portion when the screw shaft is rotated once is formed at two threads in the opposite direction on the screw shaft, and the screw shaft is in the opposite direction. It can be obtained by a simple configuration in which a first female threaded portion and a second female threaded portion having a thread groove are provided.

Further, the second female screw portion is composed of a columnar member long in a direction orthogonal to the axis of the screw shaft, and the movable grip portion is formed with a storage hole for accommodating the second female screw portion. 2 An urging member may be provided to urge the female screw 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 sandwiched between the fixed grip portion and the movable grip portion, the urging member urges the second female screw portion in the direction away from the fixed grip portion. Therefore, loosening of the screw shaft can be suppressed.

Further, the urging member is housed in a portion of the movable grip portion facing the fixed grip portion, and the urging member is in contact with the outer surface of the second female screw portion in the movable grip portion. It may be supported by a support plate provided on a portion facing the fixed grip portion.

According to this configuration, the support plate can be attached to the movable grip portion after the urging member is accommodated in the movable grip portion in a state where the second female screw portion is accommodated in the accommodating portion of the movable grip portion. Thereby, the urging member can be arranged between the second female thread portion and the support plate, and the second female thread portion can be urged in the direction away from the fixed grip portion.

Further, the urging member may be a leaf spring formed by bending a plate material.

According to this configuration, the urging member having a high urging force can be made smaller, so that the accommodating space for accommodating the urging member can be small.

Further, the pair of the urging members may be provided symmetrically with the screw shaft interposed therebetween.

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

Further, the mounting portion of the first gripping member is provided with a support portion for supporting the base end side of the movable grip portion, and the tip side of the fixed grip portion with respect to the first female screw portion and the movable grip portion. The tip side of the portion with respect to the second female thread portion may have a fixed contact surface that abuts on the rod material and a movable contact surface, respectively.

According to this configuration, the first female thread portion is located on the proximal end side of the fixed grip portion with respect to the fixed contact surface, and the second female thread portion is located on the proximal end side of the movable grip portion with respect to the movable contact surface. Since it is located at, the screw shaft screwed to them is also located on the base end side of the fixed grip portion and the movable grip portion. As a result, the screw shaft does not get in the way when the bar material is arranged between the fixed grip portion and the movable grip portion, and the workability at the time of mounting is further improved.

As described above, since the common screw shaft is screwed into the female screw portion of the fixed grip portion and the female screw portion of the movable grip portion, the medical device can be easily and quickly fixed to the bar material. ..

FIG. 1 is a diagram showing a state in which an infusion pump is attached to an infusion stand by using the clamp device according to the first embodiment of the present invention. FIG. 2 is a perspective view showing a state in which the door of the infusion pump to which the clamp device is attached is opened. FIG. 3 is a perspective view showing a state in which the device mount is attached to the clamp device. FIG. 4 is a perspective view showing a state in which the device mount according to the modified example is attached to the clamp device. FIG. 5 is a perspective view of the clamp device. FIG. 6 is a plan view of the clamp device. FIG. 7 is a front view of the clamp device as viewed from the tip end side of the grip portion. FIG. 8 is an exploded perspective view of the clamp device. FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. FIG. 10 is a cross-sectional view taken along the line X-X in FIG. FIG. 11 is a diagram corresponding to FIG. 3 according to the second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is essentially merely an example and is not intended to limit the present invention, its application or its use.

(Embodiment 1)
FIG. 1 is a view from the front side of the infusion pump 100 in a state where the infusion pump 100 is detachably fixed to the infusion stand 200 by using the clamp device 1 according to the first embodiment of the present invention. The infusion pump 100 is a medical device conventionally used when performing infusion treatment in a medical field, and is configured to be able to administer a drug solution circulating in an infusion tube 101 to a patient at a predetermined flow rate.

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

Although FIGS. 1 and 2 show a specific shape of the infusion pump 100, this is an example, and the structure and shape of the infusion pump 100 are not particularly limited in carrying out the present invention. Further, in the description of this embodiment, a case where the infusion pump 100 is fixed to the stand 200 by using the clamping device 1 will be described. For example, a syringe pump (not shown) included in a medical device is fixed to the stand 200. It can also be used when doing so. Further, the clamp device 1 can also be used when various medical devices other than the infusion pump 100 and the syringe pump are fixed to the various stands 200. That is, the clamp device 1 can be used when a medical device conventionally fixed to various stands 200 in a medical field is fixed to various stands 200.

In this embodiment, the device stand 300 is used to fix the infusion pump 100. The device stand 300 may be a member constituting a part of the infusion pump 100, and in the present embodiment, the device stand 300 and the infusion pump 100 are collectively referred to as a medical device. The device stand 300 has a thick plate shape extending in the horizontal direction from the portion fixed to the clamp device 1. The infusion pump 100 is mounted on the upper surface of the device stand 300. The device frame 300 is provided with a screw 301 for fixing the infusion pump 100 so as to project upward. By screwing the 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 stand 300. The structure for fixing the infusion pump 100 to the device mount 300 is not limited to the above-mentioned structure.

The device stand 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 stand 300, and 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 that the first recess 302 is located on the right side of FIG.

Further, as shown in FIG. 3, the apparatus pedestal 300 is also provided with a second recess 303. The first recess 302 and the second recess 303 can be provided so as to be point-symmetric with the screw 301 as the center of symmetry. That is, when the infusion pump 100 is fixed to the device stand 300 in the opposite direction to that shown in FIG. 1, the lower side of the infusion tube 102 is located in the second recess 303 shown in FIG. Therefore, even if the infusion pump 100 is installed upside down, the second recess 303 can prevent interference with the infusion tube 102.

Further, as in the modified example shown in FIG. 4, the device mount 400 may have a shape without a recess. The device mount 400 is also provided with screws 401. The shape of the device stand 400 can be a quadrangular plate shape, but the shape is not limited to this shape.

The stand 200 has a cylindrical pole (bar) 201 extending in the vertical direction. The pole 201 may be hollow or solid. The outer diameter of the pole 201 varies depending on the type of the infusion stand 200, the manufacturing company, and the like, but basically the clamp device 1 is standardized. Therefore, the clamp device 1 is configured to be compatible with poles 201 having various outer diameters.

(Structure of Clamp Device 1)
Hereinafter, the specific structure of the clamp device 1 will be described. In the description of this embodiment, the left-right direction and the depth direction of the clamp device 1 are defined as shown in each of FIGS. 3 to 10. The left-right direction of the clamp device 1 is a direction in which the fixed grip portion 12 and the movable grip portion 32, which will be described later, are brought into contact with each other. The depth direction of the clamp device 1 corresponds to the direction in which the pole 201 is taken in and out between the fixed grip portion 12 and the movable grip portion 32. The definitions of the front-back direction and the depth direction are for convenience of explanation only, and do not limit the posture and direction at the time of 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 inverted. Further, the depth direction may be referred to as a front-back direction.

The clamp device 1 includes a fixed-side gripping member (first gripping member) 10 to which a medical device including a device mount 300 is attached, a movable-side gripping member (second gripping member) 30, a screw shaft 50, and a rotation operation unit. It is equipped with 60. The fixed side grip member 10 has a mounting portion 11 to which a medical device is mounted and a fixed grip portion 12, and the mounting portion 11 and the fixed grip portion 12 are integrated by, for example, integral molding. The mounting portion 11 and the fixed grip portion 12 may be configured as separate members and integrated. The infusion pump 100 may be directly attached to the attachment portion 11, and the attachment structure thereof 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 side grip member 30 can also be made of the same material.

The mounting portion 11 has a plate shape that extends in the horizontal direction as well as in the vertical direction. As shown in FIGS. 8 and 10, 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 mount 300 to the attachment portion 11 is inserted into each fastening hole 11a from the front side to the back side. Each screw S1 inserted through the fastening hole 11a is screwed into the screw hole 304 formed on the side surface of the device mount 300. The number and position of the screws S1 can be arbitrarily set.

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. Further, as shown in FIGS. 8 and 10, the mounting portion 11 is also formed with a shaft hole 11c penetrating in the vertical direction. The mounting portion 11 is provided with a support shaft 33 as a support portion for supporting the base end side of the movable grip portion 32. The support shaft 33 is mounted so as not to be separated from the mounting portion 11 in a state of being inserted into the shaft hole 11c.

The fixed grip portion 12 is a portion that protrudes from the left side of the mounting portion 11 toward the front side and abuts on the pole 201 (shown by a virtual line in FIG. 6) from one of the radial directions. A fixed side accommodating hole 12a is formed through the base end portion of the fixed grip portion 12 in the vertical direction. The horizontal cross section of the fixed side accommodating hole 12a is circular. Further, a screw shaft insertion hole 12b is formed through the base end portion of the fixed grip portion 12 in the vertical direction. The screw shaft insertion hole 12b communicates with the vertical intermediate portion of the fixed side accommodating hole 12a. The screw shaft insertion hole 12b opens the fixed side accommodating hole 12a in the left-right direction.

A fixed contact surface 12c that abuts on the outer peripheral surface of the pole 201 is formed on the right side surface of the fixed grip portion 12 on the tip side of the fixed side accommodating hole 12a. The fixed contact surface 12c extends in the depth direction of the fixed grip portion 12 and also extends in the vertical direction, and is composed of a curved surface so that the intermediate portion in the depth direction of the fixed contact surface 12c is located on the leftmost side. There is.

As shown in FIG. 9, a mounted portion 31 to be mounted to the mounting portion 11 is provided on the base end side of the movable side gripping member 30. The attached portion 31 is formed so as to be insertable into the through hole 11b of the attachment portion 11. The mounted portion 31 is formed so that the shaft hole 31a penetrating in the vertical direction coincides with the 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 in a state where the shaft hole 31a of the mounted portion 31 and the shaft hole 11c of the mounting portion 11 are aligned with each other, the base end side of the movable side grip member 30 is mounted. It is rotatably connected to the portion 11 around the support shaft 33.

A movable side accommodating hole 32a is formed through the base end portion of the movable grip portion 32 in the vertical direction. The horizontal cross section of the movable side accommodating hole 32a is circular. Further, a screw shaft insertion hole 32b is formed through the base end portion of the movable grip portion 32 in the vertical direction. The screw shaft insertion hole 32b communicates with the vertical intermediate portion of the movable side accommodating hole 32a. The screw shaft insertion hole 32b opens the movable side accommodating hole 32a in the left-right direction.

A movable contact surface 32c that abuts on the outer peripheral surface of the pole 201 is formed on the left side surface of the movable grip portion 32 on the tip end side. 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 composed of a curved surface so that the intermediate portion in the depth direction of the movable contact surface 32c is located to the rightmost position. 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 orthogonal to the axis of the screw shaft 50. The horizontal cross section of the fixed-side male threaded portion 20 is circular, and therefore the fixed-side male threaded portion 20 is cylindrical. The outer diameter of the fixed-side male screw portion 20 is set to be slightly smaller than the inner diameter of the fixed-side accommodating hole 12a of the fixed grip portion 12, and the fixed-side male screw portion 20 is set on the fixed side from one of the vertical directions of the fixed-side accommodating hole 12a. By inserting it into the accommodating hole 12a, it can be accommodated in the accommodating hole 12a on the fixed side. With the fixed-side male threaded portion 20 housed in the fixed-side accommodating hole 12a, the fixed-side male-threaded portion 20 can rotate about the axis of the fixed-side male-threaded portion 20 with respect to the fixed gripping portion 12. As shown in FIG. 9, the outer diameter of the fixed-side male screw portion 20 is set to be smaller than the inner diameter of the screw shaft insertion hole 12b, and the outer peripheral surface of the fixed-side male screw portion 20 and the inner peripheral surface of the screw shaft insertion hole 12b. A gap is formed between the two.

As shown in FIG. 8, a screw hole 20a penetrating in the left-right direction is formed in the vertical intermediate portion of the fixed-side male screw portion 20. A screw groove is formed on the inner peripheral surface of the screw hole 20a. As shown in FIG. 9, the left end portion and the right end portion of the screw hole 20a are positioned in 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 side male screw portion (second male screw portion) 40. Like the fixed-side male-screw portion 20, the movable-side male-screw portion 40 is composed of a columnar member that is long in the vertical direction. The outer diameter of the movable side male screw portion 40 is set to be slightly smaller than the inner diameter of the movable side accommodating hole 32a of the movable grip portion 32, and the movable side male screw portion 40 is set to the movable side from one of the vertical directions of the movable side accommodating hole 32a. By inserting it into the accommodating hole 32a, it can be accommodated in the movable side accommodating hole 32a. With the movable side male screw portion 40 accommodated in the movable side accommodating hole 32a, the movable side male screw portion 40 can be rotated around the axis of the movable side male screw portion 40 with respect to the movable grip portion 32. Further, the inner diameter of the movable side accommodating hole 32a is set to be larger than the outer diameter of the movable side male screw portion 40, and is between the inner peripheral surface of the movable side accommodating hole 32a and the outer peripheral surface of the movable side male screw portion 40. Has a gap. This gap can be set to, for example, about 0.5 mm, but is not limited to this. By forming the above gap, the movable side male screw portion 40 can be slightly moved in the left-right direction inside the movable side accommodating hole 32a.

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

As shown in FIG. 8, a screw hole 40a penetrating in the left-right direction is formed in the vertical intermediate portion of the movable side male screw portion 40. A screw groove is formed on the inner peripheral surface of the screw hole 40a. As shown in FIG. 9, the left end portion and the right end portion of the screw hole 40a are positioned in 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 side male screw portion 40 is located on an extension of the axis of the screw hole 20a of the fixed side male screw portion 20. Since the fixed-side male screw portion 20 is rotatable around the axis extending in the vertical direction and the movable-side male screw portion 40 is also rotatable around the axis extending in the vertical direction, the fixed-side male screw portion 20 and the movable-side male screw portion 20 are rotatable. By rotating the portion 40 separately, the axis of the screw hole 20a of the fixed-side male screw portion 20 and the axis of the screw hole 40a of the movable-side male screw portion 40 can be positioned on the same straight line.

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

The first male screw portion 50a is formed in a predetermined region on the left side of the screw shaft 50, and the second male screw portion 50b is formed in a predetermined region on the right side of the screw shaft 50. A region in which a thread is not formed is provided between the first male screw portion 50a and the second male screw portion 50b in the screw shaft 50, and a region in which the first male screw portion 50a is formed is provided across this region. And the region where the second male threaded portion 50b is formed.

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

(Direction of each thread groove and thread)
In this embodiment, one screw shaft 50 is screwed into two screw holes, that is, the screw hole 20a of the fixed side male screw portion 20 and the screw hole 40a of the movable side male screw portion 40. When the screw shaft 50 is rotated in one direction, the fixed-side male screw portion 20 and the movable-side male screw portion 40 can be relatively close to each other, and when rotated in the opposite direction (other direction), the fixed-side male screw portion 20 and the fixed-side male screw portion 20 can be brought close to each other. The movable side male screw portion 40 can be relatively separated from the male screw portion 40. The relative moving directions of the fixed-side male threaded portion 20 and the movable-side male threaded portion 40 are the direction of the thread groove of the fixed-side male threaded portion 20 and the thread of the first male threaded portion 50a, and the thread groove and the first of the movable-side male threaded portion 40. 2 It can be set according to the direction of the thread of the male thread portion 50b.

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

For example, the thread of the fixed side male threaded portion 20 and the thread of the first male threaded portion 50a of the threaded shaft 50 and the threaded groove of the movable side male threaded portion 40 and the thread of the second male threaded portion 50b are in a reverse thread relationship. .. Specifically, when the thread groove of the fixed side male threaded portion 20 and the thread of the first male threaded portion 50a of the threaded shaft 50 are right-handed threads, the threaded groove of the movable side male threaded portion 40 and the thread of the second male threaded portion 50b. Is a left-handed screw. When the thread groove of the fixed side male threaded portion 20 and the thread of the first male threaded portion 50a of the threaded shaft 50 are left-handed, the threaded groove of the movable side male threaded portion 40 and the thread of the second male threaded portion 50b are right-handed. And. As a result, the fixed side male screw portion 20 and the movable side male screw portion 40 can be 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 side male screw portion 20 and the movable side male screw portion 40 can be relatively separated from each other.

(Structure of urging member)
In the present embodiment, as shown in FIG. 10 and the like, an urging member 70 for urging the movable side male screw portion 40 in a direction away from the fixed grip portion 12 is provided. In this embodiment, the urging member 70 is a leaf spring formed by bending a plate material made of spring steel or the like, and is formed into a chevron shape so as to be convex to the right side. The shape of the urging member 70 is not particularly limited, and may be a curved shape or a sharp shape. By using a leaf spring, the urging member 70 having a high urging force can be made smaller, so that the accommodating space for accommodating the urging member 70 can be reduced. The urging member 70 may be an elastic material such as rubber or a thermoplastic elastomer, a coil spring, a disc spring, a spring washer, or the like, in addition to the leaf spring. Further, a plurality of types of elastic materials and spring materials may be combined to form the urging member 70.

One urging member 70 may be provided, but in this embodiment, two are provided as shown in FIG. Specifically, a pair of urging members 70 are provided symmetrically with the screw shaft 50 interposed therebetween, one urging member 70 is positioned above the screw shaft 50, and the other urging member 70 is a screw shaft. It is positioned below 50. FIG. 10 shows the urging member 70 located above the screw shaft 50, and FIG. 9 shows the urging member 70 located below the screw shaft 50. Therefore, the pair of urging members 70 are arranged at a distance of at least the outer diameter of the screw shaft 50 or more.

The screw shaft insertion hole 32b described above penetrates in the left-right direction on the left side of the movable grip portion 32, that is, the portion facing the fixed grip portion 12, and the urging member 70 is located on the left side portion of the screw shaft insertion hole 32b. It is contained. Further, a support plate 80 extending in the vertical direction is fixed to the left side of the movable grip portion 32. As shown in FIG. 10, the support plate 80 is fastened and fixed to the movable grip portion 32 by screws 81 screwed into the screw holes 32d formed on the left side surface of the movable grip portion 32. As shown in FIGS. 9 and 10, the support plate 80 is inclined with respect to the axis of the screw shaft 50 in a plan view, and is separated from the fixed grip portion 12 toward the tip end side of the movable grip portion 32.

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

(How to use the clamp device 1)
Next, how to use the clamp device 1 will be described. Before fixing to the pole 201, the rotation operation unit 60 is rotated to make the distance between the fixed grip portion 12 and the movable grip portion 32 larger than the outer diameter of the pole 201. In this state, the pole 201 is inserted between the fixed grip portion 12 and the movable grip portion 32. After that, the rotation operation unit 60 is rotated to narrow the distance between the fixed grip portion 12 and the movable grip portion 32. At this time, when the rotation operation unit 60 is turned, the screw shaft 50 rotates, and the first male screw portion 50a and the second male screw portion 50b formed on the screw shaft 50 rotate in the same direction in synchronization with each other.

As shown in FIG. 9, the screw hole 20a of the fixed side male threaded portion 20 is screwed into the first male threaded portion 50a, and the screw hole 40a of the movable side male threaded portion 40 is screwed into the second male threaded portion 50b. Therefore, when the screw shaft 50 is rotated in the above one direction, a force acts in a direction in which the fixed side male screw portion 20 and the movable side male screw portion 40 are relatively close to each other. Due to this force, the movable side gripping member 30 rotates around the support shaft 33 and approaches the fixed side male screw portion 20. The amount of movement of the movable grip portion 32 when the screw shaft 50 is rotated once is the sum of the amount of movement of the first male screw portion 50a due to the screw pitch and the amount of movement of the second male screw portion 50b due to the screw pitch. .. That is, since the amount of movement of the movable grip portion 32 when the screw shaft 50 is rotated once is doubled as compared with the conventional structure, the amount of movement of the movable grip portion 32 while reducing the number of rotation operations of the screw shaft 50. Will increase. As a result, the infusion pump 100 can be quickly fixed to the pole 201 in an emergency, and the number of rotation operations of the screw shaft 50 can be reduced, which simplifies the operation.

As the screw shaft 50 is tightened, the urging force of the urging member 70 increases, and the movable side male screw portion 40 is urged in the direction away from the fixed side male screw portion 20. As a result, loosening of the screw shaft 50 is suppressed.

When removing, the movable grip portion 32 can be separated from the fixed grip portion 12 by rotating the screw shaft 50 in the direction opposite to that at the time of fixing, and the infusion pump 100 can be removed from the pole 201. Since the amount of movement of the movable grip portion 32 is large even during this removal, the clamp device 1 can be removed from the pole 201 simply by rotating the screw shaft 50 a little, and the risk of falling during removal can be reduced.

(Embodiment 2)
FIG. 11 shows the clamp device 1 according to the second embodiment of the present invention. The clamp device 1 of the second embodiment is different in that the rotation operation unit 60 is located on the fixed side and the movable side grip member 30 slides in the left-right direction with respect to the fixed side grip member 10. .. Hereinafter, the same parts as those in the first embodiment are designated by the same reference numerals, the description thereof will be omitted, and the different parts will be described in detail.

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

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

When the screw shaft 50 is rotated by turning the rotation operation unit 60, the movable side grip member 30 moves in the left-right direction along the slide rail 11d. As a result, it can be attached to and detached from the pole 201 as in the first embodiment.

The above embodiment is merely an example in every respect and should not be construed in a limited way. Further, all modifications and modifications belonging to the equivalent scope of the claims are within the scope of the present invention.

As described 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 detachably fixed to a bar material.

1 Clamp device 10 Fixed side grip member (first grip member)
11 Mounting part 12 Fixed gripping part 12c Fixed contact surface 20 Fixed side male threaded part (first male threaded part)
30 Movable side grip member (second grip member)
32a Movable side accommodating hole 32c Movable contact surface 33 Support shaft (support part)
40 Movable side male thread part (second male thread part)
50 Thread shaft 50a 1st male thread 50b 2nd male thread 60 Rotational operation 70 Basis member 80 Support plate 100 Infusion pump (medical equipment)
201 pole (rod material)

Claims

In a clamp device for detachably fixing medical equipment to a bar extending in the vertical direction.
A first grip member in which a mounting portion to which the medical device is mounted and a fixed grip portion that protrudes from the mounting portion and abuts on the rod material from one side in the radial direction are integrated.
A second gripping member having a movable gripping portion that abuts on the bar from the other in the radial direction,
A first female threaded portion provided in the fixed grip portion and having a threaded groove,
A second female threaded portion provided in the movable grip portion so as to be located on an extension of the axis of the first female threaded portion and having a threaded groove, and a second female threaded portion.
A first male threaded portion having a thread extending from at least the first female threaded portion to reach the second female threaded portion and screwed into the threaded groove of the first female threaded portion, and a threaded groove of the second female threaded portion. A screw shaft provided with a second male thread having a thread to be threaded,
A rotation operation unit for rotating the screw shaft is provided.
The direction of the thread groove of the first female thread portion and the thread of the first male thread portion so that the first female thread portion and the second female thread portion are brought close to each other by rotating the screw shaft in one direction. , The clamp device, characterized in that the direction of the thread groove of the second female thread portion and the thread of the second male thread portion is set.
In the clamping device according to claim 1,
The thread of the first female threaded portion and the first male threaded portion of the threaded shaft and the threaded groove of the second female threaded portion and the thread of the second male threaded portion of the threaded shaft are in a reverse thread relationship. A clamping device characterized by being present.
In the clamping device according to claim 1,
The second female thread portion is composed of a columnar member long in a direction orthogonal to the axis of the screw axis.
The movable grip portion is formed with a storage hole for accommodating the second female screw portion.
A clamp device provided with an urging member that urges the second female screw portion in a direction away from the fixed grip portion.
In the clamping device according to claim 3,
The urging member is housed in a portion of the movable grip portion facing the fixed grip portion.
The clamp device is characterized in that the urging member is supported by a support plate provided in a portion of the movable grip portion facing the fixed grip portion in a state of being in contact with the outer surface of the second female screw portion. ..
In the clamping device according to claim 4,
The clamping device is characterized in that the urging member is a leaf spring formed by bending a plate material.
In the clamping device according to claim 5,
A clamp device characterized in that a pair of the urging members are provided symmetrically with the screw shaft interposed therebetween.
In the clamping device according to any one of claims 1 to 6.
The attachment portion of the first grip member is provided with a support portion that supports the proximal end side of the movable grip portion.
The tip side of the fixed grip portion with respect to the first female screw portion and the tip side of the movable grip portion with respect to the second female screw portion are a fixed contact surface that abuts on the rod material and a movable contact surface, respectively. A clamp device characterized by having and.