JPH0651276B2 - Article attaching / detaching device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an article attaching / detaching device capable of quickly attaching and detaching various articles inserted in a tubular body by a simple operation.

2. Description of the Related Art In many cases, it is necessary to insert an article inside a tubular body, take out the article as required, and re-install it.
For example, a shield glass in a radiation thermometer that directly motivated the development of the present invention, a prism or a reflection installed in a lens barrel of an optical device such as a strainer or filter other than a reflection telescope installed in a fluid line system. This is a mirror.

An example of the article inserted inside the tube will be described with reference to a shield glass used in a radiation thermometer. A radiation thermometer is preferably used as a non-contact means for measuring the temperature of an object that is heated to an extremely high temperature or an object that is burning at a high temperature. This radiant thermometer utilizes the property that all objects above absolute zero radiate thermal energy proportional to the fourth power of the absolute temperature, and the radiant energy radiated from the surface of the object is thermopile. It is captured by a detection element such as a silicon photocell or a silicon photocell, converted into an electric signal and amplified, and the temperature is indicated on the instrument.

The temperature measuring method using the radiant energy has an advantage that the surface temperature of the object can be quickly measured with high accuracy without contacting the object. And when measuring the temperature in the furnace of various heat treatment furnaces and heating furnaces, in order to avoid the influence of the pressure from the furnace, atmospheric gas and other dust, the transparency and heat resistance of electromagnetic waves of the required wavelength An excellent shield glass (made of quartz, for example) is interposed between the detection element and the temperature sensing element.

Problems to be Solved by the Invention However, since one surface of the shield glass is directly exposed to a high temperature atmosphere in the furnace, it is contaminated with dust or the like over time, which lowers the transmittance of electromagnetic waves and reduces the measurement accuracy. As it damages, maintenance is required to clean it from time to time. However, the conventional shield glass mounting structure is generally complicated, bulky and expensive, and has a drawback that it requires a long time for attachment and detachment. For example, in a device of the type in which a radiation thermometer is installed in the middle of a pipe communicating with the inside of a furnace via a gate valve and a water cooling jacket, the shield glass is inserted in the pipe between the gate valve and the water cooling jacket. To be done. And when cleaning the shield glass, remove the gate valve,
Furthermore, it is necessary to remove the jacket in which the cooling water circulation pipe is arranged, which requires extremely complicated labor and time.

Further, there has been proposed a device which adopts a kind of Hall valve structure and is configured to incorporate a shield glass in the valve body. When cleaning the shield glass, the valve body is rotated 90 ° to shield the valve body between the temperature sensing element and the detection element, and the shield glass is cleaned through an opening provided in the tube body. , It is difficult to take out the shield glass from the outside,
Further, the drawback of having an expensive and bulky structure has not been solved.

OBJECT OF THE INVENTION The present invention has been proposed in order to preferably solve this problem in view of the above-mentioned various kinds of defects inherent in the cleaning of the shield glass incidentally used in the radiation thermometer according to the prior art. Therefore, it is an object of the present invention to provide an article attaching / detaching device having a low cost and a simple structure that can easily and quickly attach / detach the article when the article needs to be detachably inserted in the tubular body.

Means for Solving the Problems In order to preferably solve the above-mentioned object, an article attaching / detaching device according to the present invention is a tube body having an opening portion communicating with the inside of the tube body in a tube wall, An article freely inserted into the tubular body, a restriction portion formed on the inner peripheral surface of the tubular body so as to restrict one axial movement of the article inside the tubular body, and an axis provided inside the tubular body. An intermediate member that is movable in a direction, and that can press the article between the regulating portion and the intermediate member in the axial direction toward the regulating portion,
And a pressing unit that holds the article in a fixed position between the intermediate member and the restriction unit.

Embodiments Next, an article attaching / detaching device according to the present invention will be described below with reference to the accompanying drawings, with reference to a plurality of preferred embodiments. It should be noted that, as an embodiment, a description will be given of the device for attaching / detaching the shield glass, which is detachably inserted in the pipe body connecting the temperature measuring element and the detection element of the radiation thermometer, but is not limited thereto. Of course.

(First Embodiment) FIGS. 1 to 3 show the most preferred embodiment of the present invention, in which the left side of the tube shown by reference numeral 10 is a temperature measuring element such as a heat treatment furnace (not shown). The pipe 10 is connected through a sluice valve (not shown), and the right side of the pipe 10 is also connected to the detection element side of a radiation thermometer (not shown). This tube 10
Is preferably configured as a hollow cylindrical body made of metal, and a rectangular opening 12 having a predetermined size is circumferentially provided on the wall surface of the tube body 10 so as to communicate with the inside of the tube body 10. ing. As shown in FIG. 1, an arcuate step portion 10a is formed in the lower portion of the inner wall surface of the tube corresponding to the opening 12, and the upright surface 10 formed by the step portion 10a is formed.
b (a surface orthogonal to the axial line of the tubular body) serves as a restricting portion that can restrict one axial movement of the shield glass 14 described later.

A circular shield glass 14 is detachably inserted in the tubular body 10 through an opening 12. That is, as can be seen from FIGS. 1 and 2, the shield glass 14 made of quartz is set in the circular through hole of the annular member 16,
It is adapted to be clamped and held via a ring screw 18. An O-ring 20 is fitted between the shield glass 14 and the step provided in the through hole of the annular member 16.
Further, as shown in the drawing, the O-ring 2 is provided on both end surfaces of the annular member 16.
4 and 26 are fitted to improve the adhesion between the regulating portion 10b and the intermediate member 22 described later. That is, when the annular member 16 is loaded into the opening 12, the O-rings 2 are respectively provided on the end surface of the annular member 16 facing the regulating portion 10b and the end surface facing the intermediate member 22.
4, 26 are inserted.

A sleeve-shaped intermediate member 22 is disposed on the left side of the opening 10 of the tube body 10 as shown in the drawing. The intermediate member 22 has an outer flange 22a and an inner wall flange 10c defined on the inner wall surface of the tube. A compression spring 28, which is elastically interposed between and, always axially urges the compression spring 28 in a direction away from the restriction portion 10b. Then, as shown in FIG. 1, the right end portion of the intermediate member 22, when the annular member 16 provided with the shield glass 14 is interposed, is connected to the annular member 16 and O
The size is set so that it can be abutted via the ring 26.
Reference numeral 30 denotes an O-ring that seals the intermediate member 22 and the inner wall surface of the tubular body 10 so as to be slidable in the axial direction.

Next, reference numeral 32 indicates a pressing means, and this pressing means 32 is
The rotary shaft 34 which is supported at a right angle to the tubular body 10, the handle 36 attached to the outer end of the rotary shaft 34, and the rotary shaft 34.
It is basically composed of a deformable cam plate 38 (for example, an elliptical shape) attached to the inner end of the tube and facing the inside of the tube body 10. The cam plate 38 can be provided at the left end portion of the intermediate member 22, and as shown in FIG. 2, the end portion of the cam plate 38 on the ellipse major axis side is the intermediate portion according to the turning angle of the handle 36. The member 22 is brought into contact with the elliptical minor axis side end portion thereof. In this case,
When the long-axis side end of the cam plate 38 comes into contact with the intermediate member 22, the intermediate member 22 is resisted against the compression elastic force of the compression spring 28.
It will be appreciated that the intermediate member 22 moves leftward under the elastic force of the compression spring 28 when the short axis side end contacts the intermediate member 22. The rotating shaft 34 of the pressing means 32 faces the tube 10 through the sleeve 40, and an O ring is provided between the rotating shaft 34 and the inner wall surface of the sleeve 40 in order to seal the inside of the tube. 42 is inserted.

In FIGS. 1 and 3, reference numeral 44 indicates the opening 1.
2 shows a lid for hermetically covering 2 and the lid 44 is attached by bolts 46. Further, reference numeral 48 indicates a knob provided on the annular member 16.

Second Embodiment Next, FIGS. 4 and 5 show another embodiment of the apparatus according to the present invention, which is different from the above-described embodiment only in the structure of the pressing means 32. It's different. Therefore, only the different components will be described.
The reference numeral 2 designates a threaded rotary shaft 34 screwed into a sleeve 40 exposed in the tubular body 10, a circular handle 36 provided at an outer end portion of the rotary shaft 34, and the inside of the tubular body of the rotary shaft 34. Basically, it is composed of a conical surface 38 formed at the end facing the. Further, in the figure, a taper 22c is formed in the circumferential direction at the left end portion of the intermediate member 22 so as to be in close contact with the conical surface 38 and set to the possible angle. Then, when the rotating shaft 34 descends due to the rotation of the handle 36, the conical surface 38 is pressed against the taper 2c of the intermediate member 22 to exert a wedge effect, and the intermediate member 22 is compressed by the compression spring 28.
The inside of the tubular body 10 can be moved to the right in the axial direction against the elasticity of. When the rotary shaft 34 is raised by the rotation of the handle 36, the conical surface 38 is separated from the taper 22c of the intermediate member 22 to release the pressing force, and the intermediate member 22 is moved by the elastic force of the compression spring 28 to form a tubular body. The inside is moved to the left in the axial direction.

Incidentally, the conical surface 38 formed at the end of the rotary shaft 34 may be a curved surface such as a spherical surface instead of this, and even if it is simply a rod, the same action and effect can be obtained.

(Third Embodiment) FIGS. 6 and 7 show still another embodiment of the apparatus according to the present invention, which is also mainly a pressing means 32.
The configurations are different. However, as will be described later, since the forward and backward movements of the intermediate member 22 are forcibly imparted to the intermediate member 22 by the operation of the handle, between the tube body 10 and the intermediate member 22,
The compression spring as described above is not interposed.

In this embodiment, the eccentric cam plate 38 constituting the pressing means 32 faces the opening 22c formed in the intermediate member 22 and can rotate horizontally as the handle 36 rotates. That is, the opening 22c is set to a size slightly larger than the diameter of the cam plate 38, and when the cam plate 38 rotates in the opening 22c, the opening 22c exists in the positional relationship and the intermediate The member 22 can be moved back and forth in the axial direction inside the tubular body 10.

Operation of the Invention Next, the operation of the apparatus according to the embodiment of the present invention thus configured will be described. As shown in FIGS. 2 and 3, when the handle 36 is rotated in a direction orthogonal to the axis of the tubular body 10, the end of the cam plate 38 on the side of the elliptical minor axis is the left end of the intermediate member 22. The intermediate member 22 is axially moved in the tube body 10 by the elastic force of the compression spring 28 by ½ (= α) of the dimensional difference between the major axis portion and the minor axis portion of the ellipse. It is forcibly moved to the left in the direction. Therefore, a sufficient gap is provided between the right end portion of the intermediate member 22 and the restriction portion 10b formed in the tube body 10 to allow the annular member 16 including the shield glass 14 to be interposed.

In this state, the annular member 1 is inserted through the opening 12.
When 6 is inserted into the tubular body 10, the right end portion of the annular member 16 comes close to the regulation portion 10b, and the movement thereof to the right in the axial direction is regulated. Next, as shown in FIG. 1, when the handle 36 is rotated to a position parallel to the axis of the tubular body 10, the end portion of the cam plate 38 on the ellipse major axis portion side is the intermediate member 2.
The left end face of 2 is pressed (shown by the solid line in FIG. 2), and the intermediate member 22 is forcibly moved to the right in the axial direction by the dimensional difference α. As a result, the intermediate member 22 can reliably press and fix the annular member 16 provided with the shield glass 14 with the restriction portion 10b in a state where the compression spring 28 is compressed. In this case, the O-rings 24 and 26 described above are fitted and inserted on both the side where the annular member 16 contacts the regulating portion 10b and the side where the annular member 16 contacts the right end surface of the intermediate member 22. The inside is completely cut off from the outside world. Therefore, in this state, the temperature in the heat treatment furnace, which is a heat generation source (not shown), can be set by the detection element (not shown) via the shield glass 14.

As described above, the shield glass 14 is contaminated due to dust adhesion in the furnace during the temperature measurement as described above, and therefore it is necessary to regularly clean the shield glass 14 so as not to impair the measurement accuracy. At this time, if the handle 36 is rotated in the direction shown in FIG. 3 as described above, and the intermediate member 22 is moved to the left inside the tube body 10 by the dimensional difference α (see FIG. 2). (Shown by a line), the pressing force on the annular member 16 is released, and the annular member 16 can be easily taken out through the opening 12. Therefore, cleaning the shield glass 14
It can be easily achieved outside the tube 10.
It is needless to say that the lid 44 is previously removed from the opening 12 by loosening the bolt 46. The shield glass 14 that has been cleaned is the annular member 1
6 is again inserted into the tubular body through the opening 12,
It is securely fixed by performing the handle operation described above.

Also in the cases shown in the second and third embodiments, the handle 3
By rotating 6 the intermediate member 22 is moved back and forth inside the tubular body 10 to press and release the annular member 16 against the regulating portion 10b, and to attach and detach the shield glass 14 provided on the annular member 16. Can be easily done.

EFFECTS OF THE INVENTION As described above, according to the article attaching / detaching device of the present invention, the article to be inserted in the tubular body can be quickly attached / detached by a simple operation, even though it has an extremely simple structure. Therefore, various kinds of maintenance of the article are facilitated. Further, since the structure is simple, it has advantages that it is easy to manufacture, the cost is low, and the overall size is compact. In addition, in the present embodiment, the attachment / detachment device of the shield glass used incidentally to the radiation thermometer has been described, but the attachment / detachment mechanism of the strainer and the filter interposed in the pipeline system of various fluids and the mirror of the optical machine It can also be suitably used as a mechanism for attaching and detaching a prism, a reflecting mirror, or the like that is inserted in the body.

[Brief description of drawings]

The drawings show a preferred embodiment of the article attaching / detaching device according to the present invention, and FIG. 1 is a longitudinal sectional view showing a main part of a shield glass attaching / detaching device additionally used for a radiation thermometer. FIG. 2 shows a state in which the shield glass is fixed inside the tubular body, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG.
In the apparatus shown in the figure, a longitudinal sectional view of a main part showing a state in which a shield glass is taken out from a tubular body, FIG. 4 is a longitudinal sectional view showing another embodiment of the apparatus of the present invention, and FIG. 5 is shown in FIG. FIG. 6 is a longitudinal sectional view of an essential part of the apparatus shown, showing a state in which the pressure on the shield glass is released, FIG. 6 is a longitudinal sectional view showing still another embodiment of the apparatus of the present invention, and FIG. 7 is shown in FIG. It is a longitudinal cross-sectional view of the main part of the device shown, showing a state in which the pressure on the shield glass has been released. 10 ... Tube, 10b ... Restriction part 12 ... Opening part, 14 ... Shield glass 16 ... Annular member, 28 ... Compression spring 32 ... Pressing means, 36 ... Handle

Claims (7)

[Claims] 1. A tube body having an opening provided in a tube wall for communicating with the inside of the tube body, an article detachably inserted into the tube body through the opening, and an article of the article inside the tube body. One restricting portion formed on the inner peripheral surface of the tubular body so as to restrict axial movement, and arranged inside the tubular body so as to be movable in the axial direction, so that the article can be pressed between the restricting portion. An intermediate member, by pressing the intermediate member in the axial direction toward the regulating portion,
An article attaching / detaching device comprising: a pressing unit that holds the article in a fixed position between the intermediate member and the restriction unit. 2. The article is a shield glass used for a radiation thermometer, and the shield glass is attached to a circular through hole of an annular member via a ring screw. Article attachment / detachment device. 3. The intermediate member comprises a sleeve concentrically arranged inside the tubular body, and an elastic member for urging the intermediate member in a direction separating from the regulating portion is interposed in the intermediate member. The article attaching / detaching device according to claim 1 or 2, which is mounted. 4. The pressing means comprises a rotary shaft supported in a direction orthogonal to the tubular body, a handle provided at an outer end of the rotary shaft, and a cam plate provided at an inner end of the rotary shaft. Composed,
The article attaching / detaching device according to any one of claims 1 to 3, wherein the cam plate functions to press and release the intermediate member in the axial direction according to a rotation angle thereof. 5. The pressing means comprises a rotating shaft which is orthogonal to the tubular body and faces the inside, a handle provided at an outer end of the rotating shaft, and a conical surface provided at an inner end of the rotating shaft. In addition, the intermediate member has a taper at an end that can come into contact with the conical surface,
Claims 1 to 3 wherein the intermediate member can be pressed and released in the axial direction by moving in the axial direction of the rotating shaft while the conical surface is in contact with the taper of the intermediate member. 5. The article attaching / detaching device according to any one of 1. 6. The article attaching / detaching apparatus according to claim 1, wherein the intermediate member is a sleeve concentrically arranged inside the tubular body. 7. The pressing means comprises a rotating shaft supported in a direction orthogonal to the tubular body, a handle provided at an outer end of the rotating shaft, and a cam plate provided at an inner end of the rotating shaft. Composed,
This cam plate faces the opening provided in the intermediate member,
The article attaching / detaching device according to any one of claims 1, 2 and 6, wherein the intermediate member is forcibly pressed and released in the axial direction.