Clip

Abstract

To provide a clip that enables a single component to perform attachment, detachment, and fixing of a sample flask, and enhances attachment / detachment operability and safety.SOLUTION: There is provided a clip 10 that detachably holds a sample flask 2 to a rotary joint 7 inserted into drive means 3 of a rotary evaporator 1. The clip comprises: an annular lock screw ring 11 arranged on an outer side; and an annular lock hook ring 12 arranged on an inner side. The lock screw ring 11 comprises, on a rear end side thereof, a male threaded portion 11b that screws into the drive means 3. The lock hook ring 12 comprises, on a front end surface thereof, an engaging protrusion portion 12d that engages with a lip protrusion portion 2b of a sample flask opening, and a pressing surface 12b that pushes out the lip protrusion 2b portion. The lock hook ring 12 is rotatable in a longitudinal direction with respect to the lock screw ring 11.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a clip, and more particularly to a clip for detachably connecting and holding a sample flask to a rotary joint that is inserted into the drive means of a laboratory device such as a rotary evaporator. [Background technology]

[0002] When attaching a sample flask to a rotary joint inserted into the drive means of an experimental device such as a rotary evaporator, the tapered surface of the joint part of the rotary joint and the tapered surface on the inner periphery of the opening of the sample flask are joined according to a common taper fitting standard, and fixed with a joint clip (see Patent Document 1 and Non-Patent Document 1).

[0003] In addition, the tapered grinding fit can become stuck, so in order to push out the sample flask and remove it, a flask removal screw and a part called a joint ring (extrusion ring) were interposed between the driving means and the joint clip (see Patent Document 1 and Non-Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6926757 [Non-patent literature]

[0005] [Non-Patent Document 1] Tokyo Rikakikai Co., Ltd., Genuine Parts (Standard / Optional) for Small Rotary Evaporators, [online], [Searched February 14, 2024], Internet<URL:https: / / eyela-chiller.jp / products / n_parts / n1300n1210parts.shtml> Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the cases of Patent Document 1 and Non-Patent Document 1, the joint clip had to be attached and detached every time a sample flask was attached or detached, and it was also necessary to keep the joint clip near the laboratory bench at all times to avoid the situation where the joint clip could not be found during operation.

[0007] In addition to the joint clip, other parts such as a flask removal screw and a joint ring (extrusion ring) were also required, resulting in a large number of parts.

[0008] Therefore, an object of the present invention is to provide a clip that allows for the attachment, detachment, and fixing of a sample flask with a single part, and improves attachment / detachment operability and safety. [Means for solving the problem]

[0009] In order to achieve the above-mentioned object, the clip of the present invention is a clip that detachably holds a sample flask to a rotary joint that is inserted into the driving means of an experimental device, and has an annular lock screw ring arranged on the outside and an annular lock hook ring arranged on the inside, the lock screw ring having a screwing means at its rear end that screws into the driving means, the lock hook ring having an engaging convex portion on its front end surface that engages with the lip convex portion of the sample flask opening and a pressing surface that pushes out the lip convex portion, and the lock hook ring is characterized in that it can be rotated in the forward and backward directions relative to the lock screw ring.

[0010] The lock hook ring is provided with a coil spring that can engage with a step between the joint portion and the small diameter portion of the rotary joint. [Effects of the Invention]

[0011] According to the clip of the present invention, the sample flask can be attached and detached by the rotatable lock hook ring while being fixed to the drive means by the threaded engagement means of the lock screw ring. Also, since it is equipped with a coil spring that can be engaged with the rotary joint, the clip itself will not come off even if the threaded engagement means comes off. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a front view showing a rotary evaporator using the clip of the present invention. [Figure 2] 1 is a perspective view showing a rotary evaporator using the clip of the present invention. [Figure 3] 1 is a partial cross-sectional view showing a rotary evaporator using a clip according to the present invention. [Figure 4] FIG. 10 is a cross-sectional view showing a state in which a sample flask is attached to a driving means by the clip of the present invention. [Figure 5] 1 is a perspective view of a clip showing an example of the present invention. [Figure 6] FIG. [Figure 7] This is also a side view. [Figure 8] This is also a cross-sectional view (normal state). [Figure 9] FIG. 10 is a cross-sectional view of the same (when the lock hook ring is rotated). [Figure 10] FIG. 1 is an exploded view showing the clip, drive means and sample flask of the present invention. [Figure 11] FIG. 1 is a perspective view showing the attachment state of the clip, driving means, and sample flask of the present invention. [Figure 12] FIG. 1 shows the initial stage of sample flask installation. [Figure 13] FIG. 1 shows the first stage in removing the sample flask. [Figure 14] FIG. 10 shows the second stage in removing the sample flask. DETAILED DESCRIPTION OF THE INVENTION

[0013] 1 to 3 show an example of a rotary evaporator using a clip 10 of the present invention, and the rotary evaporator 1 includes a sample flask 2 into which a sample solution is poured, a driving means 3 for rotating the sample flask 2, a heating device 4 for heating the sample flask 2, a cooler (condenser) 5 for cooling and condensing the solvent vapor evaporated from the sample solution and discharged from the sample flask 2, a recovery flask 6 for recovering the solvent condensed in the cooler 5, and a pressure reducing means (not shown) for reducing the pressure inside the sample flask 2, the cooler 5, and the recovery flask 6.

[0014] The sample flask 2 is heated under reduced pressure and rotated to evaporate the sample inside; an eggplant-shaped flask is used. The driving means 3 rotates the sample flask 2 using a motor, and the sample flask 2 is detachably connected to a rotary joint (vapor duct) 7 inserted into the driving means 3 by a clip 10 of the present invention, which will be described later. The driving means 3 can adjust the rotation speed, rotation direction (forward / reverse rotation), interval time, etc. using the operating device 3a. In addition, the height can be adjusted using the jack handle 3b, and the angle can be adjusted using the angle adjustment handle 3c.

[0015] The heating device 4 includes a heater unit 4b having an operation panel 4a on the front surface, and a water bath (constant temperature bath) 4c detachably provided on the upper part of the heater unit 4b.

[0016] The cooler 5 is composed of a vertical tube 5a at the top that circulates cooling water inside in a spiral pattern, and an adapter 5b at the bottom that connects to a collection flask 6 and a rotary joint 7. A capillary tube 8 for injecting a sample into the sample flask 2 is inserted from the side of the adapter 5b.

[0017] In the rotary evaporator 1, a sample flask 2 is placed in a water bath 4c, and while the water in the water bath 4c is heated by a heater unit 4b and the pressure is reduced by a pressure reducing means, the sample flask 2 is rotated by a driving means 3 to evaporate and concentrate the sample inside. By immersing the sample flask 2 in the water bath 4c and rotating it, the sample is agitated to prevent bumping, and a thin film is formed inside the sample flask 2, increasing the evaporation area, allowing the sample to be evaporated and concentrated efficiently. The evaporated solvent vapor is cooled and condensed in a cooler 5, and the condensate is collected in a collection flask 6.

[0018] As shown in Figure 4, the rotary joint 7 has a tapered joint section 7a at its tip end, which gradually reduces in diameter toward the tip. The rear end of the joint section 7a is provided with a large-diameter section 7c, sandwiching a cylindrical small-diameter section 7b. The inner circumferential surface of the inlet section 2a of the sample flask 2 is tapered to match the joint section 7a. The open end of the inlet section 2a is formed with a lip 2b that protrudes in the circumferential direction. Thus, the rotary joint 7 and the sample flask 2 are connected using a so-called common taper joint.

[0019] The rotary joint 7 is attached to the drive means 3 by a well-known method. Specifically, the rotary joint 7 is inserted from the rear end side into the rotary insertion hole of the drive means 3, while the lock housing 3d is pressed and the lock sleeve 3e is tightened, causing the ring-shaped spring 3g provided on the inner circumferential surface to contract and press against the stepped portions between the small diameter portion 7b and the large diameter portion 7c, thereby attaching the rotary joint to the drive means 3.

[0020] Furthermore, the clip 10 of the present invention detachably connects and holds the sample flask 2 to the rotary joint 7. As shown in Figures 5 to 9, the clip 10 of the present invention is configured by arranging two annular members, a lock screw ring 11 and a lock hook ring 12, inside and outside.

[0021] The lock screw ring 11 on the outer periphery has an outer diameter slightly smaller than that of the lock sleeve 3e and has a hole 11a in the center that can accommodate the lock hook ring 12. The rear end of the lock screw ring 11 (the drive means 3 side) is provided with a male thread 11b (the threading means of the present invention) that screws into a female thread 3f formed on the inner periphery of the lock sleeve 3e. The outer periphery of the front end (the sample flask 2 side) is provided with a number of grooves extending in the front-to-rear direction in the circumferential direction to facilitate operation when rotating (screw-fastening) the lock screw ring 11.

[0022] The lock hook ring 12 on the inner circumferential side has an outer diameter slightly smaller than the hole 11a, and has a hole 12a in the center through which the rotary joint 7 can be inserted.

[0023] The lock hook ring 12 is attached to the lock screw ring 11 so as to be rotatable in the front-to-rear direction (the axial direction of the lock hook ring 12) starting from one end. Specifically, holes through which a spring pin 14 can be inserted are formed in one end of each of the lock screw ring 11 and the lock hook ring 12, and the spring pin 14 is inserted between the lock screw ring 11 and the lock hook ring 12 with a pair of torsion springs 13 interposed therebetween, thereby attaching the lock screw ring 11 and the lock hook ring 12.

[0024] The lock hook ring 12 is normally biased toward the front end (toward the sample flask 2) relative to the lock screw ring 11 by the repulsive force of the torsion spring 13. The rear end face of the lock hook ring 12 gradually slopes forward from one end where the torsion spring 13 is provided to the other end (see Figure 8). When the lock hook ring 12 is rotated toward the rear end against the repulsive force of the torsion spring 13, the rear end face of the lock hook ring 12 becomes approximately flush with the rear end face of the lock screw ring 11 (see Figure 9).

[0025] The front end surface of the lock hook ring 12 has one end, where the torsion spring 13 is provided, forming a pressing surface 12b that pushes against the lip protrusion 2b at the open end of the sample flask 2, and the other end forming a hook portion 12c that protrudes forward. The tip of the hook portion 12c is inclined inward and has an engaging protrusion 12d that engages with the lip protrusion 2b. Furthermore, a coil spring 15 is suspended from the rear end surface of the other end of the lock hook ring 12.

[0026] Fig. 10 shows an exploded view of the clip 10, driving means 3 and sample flask 2, and Fig. 11 shows a perspective view of the attached state. The steps of attaching and detaching the sample flask 2 will be explained below with reference to the drawings.

[0027] 12, the clip 10 is inserted from the tip of the rotary joint 7 toward the drive means 3, and the lock screw ring 11 is tightened so that the male thread 11b is partially threaded into the female thread 3f of the lock sleeve 3e. Next, the sample flask 2 is inserted from the tip of the rotary joint 7 while the joint part 7a and the tapered inner surface of the inlet part 2a are fitted together.

[0028] The lip protrusion 2b of the sample flask 2 abuts against the hook portion 12c of the lock hook ring 12. When the sample flask 2 is further inserted, the lip protrusion 2b bounces up the hook portion 12c against the repulsive force of the torsion spring 13, causing the lock hook ring 12 to rotate toward the drive means 3. When the sample flask 2 is further inserted, the repulsive force of the torsion spring 13 causes the lock hook ring 12 to rotate toward the front end, and the engaging protrusion 12d engages the back side of the lip protrusion 2b (the bottom side of the flask). From this provisionally fixed state, the sample flask 2 is fixed to the rotary joint 7 by further turning the lock screw ring 11 (see Figure 4).

[0029] On the other hand, when removing the sample flask 2, the lock screw ring 11 is turned so that the male thread portion 11b and the female thread portion 3f are disengaged. When the lock screw ring 11 moves a certain distance toward the tip (toward the sample flask 2), the pressing surface 12b comes into contact with the lip protrusion 2b, and the tapered engagement can be released (the state shown in Figure 13). However, even if the engagement is released, the engaging protrusion 12d remains engaged with the lip protrusion 2b due to the repulsive force of the torsion spring 13, so the sample flask 2 will not fall off.

[0030] From this state, as shown in Figure 14, while holding the sample flask 2 in your hand, push up the hook portion 12c with your fingertips to rotate the lock hook ring 12, thereby allowing you to securely remove the sample flask 2.

[0031] Furthermore, even if the male screw portion 11b and the female screw portion 3f are completely disengaged, the coil spring 15 engages with the step between the joint portion 7a and the small diameter portion 7b, so that the clip 10 itself will not fall off.

[0032] In the above-described embodiment, the lock screw ring 11 and the lock hook ring 12 are made rotatable using a spring pin and a torsion spring, but the present invention is not limited to such a configuration as long as they are rotatable in the forward and backward directions. The clip of the present invention can also be used in laboratory equipment other than rotary evaporators. [Explanation of symbols]

[0033] DESCRIPTION OF SYMBOLS 1...rotary evaporator, 2...sample flask, 2a...inlet portion, 2b...lip protrusion, 3...driving means, 3a...operating device, 3b...jack handle, 3c...angle adjustment handle, 3d...lock housing, 3e...lock sleeve, 3f...female thread portion, 3g...ring-shaped spring, 4...heating device, 4a...operation panel, 4b...heater unit, 4c...water bath, 5...condenser, 5a...vertical tube, 5b...adapter, 6...recovery flask, 7...rotary joint, 7a...joint portion, 7b...small diameter portion, 7c...large diameter portion, 8...capillary tube, 10...clip, 11...lock screw ring, 11a...hole, 11b...male thread portion, 12...lock hook ring, 12a...hole, 12b...pressing surface, 12c...hook portion, 12d...engaging protrusion, 13...torsion spring, 14...spring pin, 15...coil spring

Claims

1. A clip for removably holding a sample flask to a rotary joint inserted into a drive means of an experimental device, comprising: The locking mechanism has an annular lock screw ring disposed on the outside and an annular lock hook ring disposed on the inside, The lock screw ring is a screwing means at the rear end side that is screwed onto the driving means; The locking hook ring is a front end surface provided with an engaging protrusion for engaging with the lip protrusion of the opening of the sample flask, and a pressing surface for pushing out the lip protrusion; The clip is characterized in that the lock hook ring is rotatable in the front-rear direction relative to the lock screw ring.

2. 2. The clip according to claim 1, wherein the engaging protrusion is provided at a position protruding forward from a front end surface of the locking hook ring.

3. 3. The clip according to claim 1, wherein the lock hook ring includes a coil spring that can engage with a step between the joint portion and the small diameter portion of the rotary joint.

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