JP2012240719A - Lid supporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid opening and closing device having a simple structure and strength in which a lid can be easily attached and detached and the lid can be smoothly opened and closed by eliminating rattling in the width direction of the lid.SOLUTION: The lid opening and closing device includes a first shaft 4 and a second shaft 5 formed on opposing inner faces of an opening part 2 of a case body 1, and the lid 6 having a first bearing part and a second bearing part turnably fitted to the shafts. The first shaft 4 includes a shaft part 4a having cut faces 4c formed on the right and left thereof, and a flat surface contacting stepped part 4b. The second shaft 5 includes a columnar shaft part and a flat surface contacting stepped part. The first bearing part includes a receiving hole and a groove extending toward an end face of the lid 6 from the receiving hole with its end opened at the end face of the lid 6. The surface contacting stepped part 4b of the first shaft is extended in the taking out direction of the lid from the shaft part 4a, and the surface contacting part of the second shaft is extended in a direction opposite to the taking out direction of the lid from the shaft part.

Description

  The present invention relates to a support device for a lid that opens and closes an opening of a box or housing of an analyzer such as a spectrophotometer, and more particularly to a support device that removably supports a lid that rotates about a rotation axis.

The spectrophotometer is provided with a sample chamber in which a measurement sample is attached. The measurement sample is mounted on the measurement optical path passing through the sample chamber, and the transmittance and An optical measurement of reflectivity is performed.
Further, in the spectrophotometer, a measurement unit that can be attached to and detached from the sample chamber is prepared as an optional component so that optical measurement can be performed using a special optical system in addition to normal measurement. Specifically, for example, a measurement unit using an integrating sphere for scattering reflection measurement of the sample surface is prepared, and these measurement units can be attached by removing the lid of the sample chamber. It is. Therefore, in the sample chamber, a lid that rotates for opening and closing is detachably supported with respect to the sample chamber main body.

  The support device that removably supports the lid can be easily attached / detached with a simple mechanism, and can be smoothly rotated without any backlash in the axial direction, that is, the width direction of the lid when the lid is attached. It is requested.

FIG. 8 shows an example of a conventional detachable lid support device.
In this support device, a pair of mounting pieces 11, 11 are provided on the lid 10, and a bearing hole 12 or a shaft 13 ′ (see FIG. 8B) is provided on the mounting pieces 11, 11. Further, a shaft 13 or a bearing hole 12 ′ (see FIG. 8B) is provided on the inner surface 16 facing the opening 15 formed in the case body 14, and the shaft 13 (or 13 ′) has a bearing. The lid 10 is attached by fitting the hole 12 (or 12 ').
In the above configuration, when the lid 10 is attached or removed, the attachment piece 11 is bent so that the bearing hole 12 or 12 'is fitted into the shaft 13 or 13' or removed from the shaft.
This method has a drawback that the strength of the shaft support portion is weak because the mounting piece 11 that supports the lid is bent.

  As another method, for example, as shown in Patent Document 1, there is a method in which a shaft (convex portion) protrudes and retracts elastically with respect to a bearing hole (rotating hole). However, this method has a drawback that an elastic member for urging the shaft is required, and a mechanism for incorporating them is complicated and the cost is increased.

JP-A-5-254555

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a lid opening / closing device that can be easily opened and closed, can be smoothly opened and closed without rattling in the width direction of the lid, and has a simple structure and strength. It is.

  In order to achieve the above object, the present invention takes the following technical means. That is, the lid support device of the present invention includes a first shaft and a second shaft formed on opposite inner surfaces of the opening of the case body, and a first shaft that is rotatably fitted to the first shaft. And a lid having a second bearing portion that is rotatably fitted to the second shaft, and the first shaft has cut surfaces that are parallel to each other. The shaft portion and a flat surface stepped portion extending along the surface direction of the cut surface in a direction perpendicular to the axis of the shaft portion from the root portion of the shaft portion, and the second shaft is cylindrical And a flat surface stepped portion extending in a direction perpendicular to the axis of the shaft portion at the base portion of the shaft portion, and the first bearing portion is a shaft portion of the first shaft. And a groove that extends from the receiving hole toward the end face of the lid and has a tip that opens at the end face of the lid. The distance between the left and right cut surfaces of the shaft portion is formed with substantially the same dimension, and the surface contact step portion of the first shaft extends from the shaft portion of the first shaft in the direction of taking out the lid, The surface contact step portion of the second shaft is configured to extend from the shaft portion of the second shaft in a direction opposite to the direction of taking out the lid.

According to the present invention, during the opening / closing operation, the flat surfaces of the first and second shafts are not in contact with the left and right side surfaces of the lid, and there is no gap between them. As a result, there is no backlash in the left-right direction (width direction) of the lid, and the lid can be opened and closed smoothly. In addition, since the shaft and the bearing portion are not provided with any element that bends or elastically deforms, a lid support device having a simple structure and high strength can be obtained.
When the lid is lifted in an inclined posture with the second shaft as a fulcrum with the left and right cut surfaces of the first shaft aligned with the groove direction of the first bearing portion, the groove of the first bearing portion Is positioned on the side opposite to the pulling direction, so that the lid can be pulled out without the first shaft interfering. Further, since the surface stepped portion of the second shaft is formed in the direction opposite to the direction of taking out the cover, the side surface of the cover does not get in the way of contact with the surface stepped portion when the cover is inclined. Thereby, attachment / detachment of a lid | cover can be performed easily.
In addition, when the lid is attached, the surface stepped portion of the first shaft is provided on the side of the lid taking out from the shaft portion, so when the receiving hole of the first bearing portion is fitted into the shaft portion, There is an effect that the side surface is in contact with the flat surface of the interview step portion, and the lid can be rotated without being interfered by the contact step portion.

It is a perspective view of the support device of the lid concerning the present invention. It is an expansion perspective view which shows the principal part of the support apparatus of the lid | cover shown in FIG. It is an expansion perspective view which shows the 2nd axis | shaft in this invention. It is a perspective view which shows the principal part of the lid | cover in this invention. It is an expansion perspective view which shows the 1st bearing part of the lid | cover shown in FIG. It is an expansion perspective view which shows the 2nd bearing part of the lid | cover shown in FIG. It is sectional drawing which shows the attachment or detachment procedure of a cover. It is a perspective view which shows an example of the conventional support apparatus of a lid | cover.

Hereinafter, a lid support device according to the present invention will be described in detail based on an embodiment of a lid structure of a sample chamber in the spectrophotometer shown in FIGS.
As shown in FIG. 1, the case main body 1 of the spectrophotometer is provided with an opening 2 on its upper wall surface and a lid 6 (the lid is indicated by a virtual line) that opens and closes the opening 2. The inside of the opening 2 is a sample chamber.

As shown in FIG. 2, the first shaft 4 and the second shaft 5 are opposed to the inner surfaces 3, 3 facing each other of the opening 2 of the case body 1, and the axis (exactly described later). Are arranged so as to coincide with each other and are formed integrally with the case body 1.
The first shaft 4 includes a shaft portion 4a in which cut surfaces 4c and 4c that are parallel to each other are formed on the left and right circumferential surfaces of the cylindrical body, and a direction perpendicular to the axis of the shaft portion 4a from the root portion of the shaft portion 4a. It consists of a flat interview step 4b extending along the surface direction of the cut surface. In this embodiment, the surface contact step 4b is formed with the same width as the interval between the cut surfaces 4c and 4c, and the left and right side surfaces 4d and 4d of the surface contact step 4b are flush with the cut surfaces 4c and 4c of the shaft portion 4a. It is formed continuously so as to form Further, the interview step 4b is formed in the vertical upward direction, which is the direction in which the lid 6 is taken out from the shaft 4a.

As shown in FIG. 3, the second shaft 5 includes a cylindrical shaft portion 5 a and a flat surface contact step portion 5 b extending at a root portion of the shaft portion 5 a in a direction perpendicular to the axis of the shaft portion 5 a. It consists of. The surface contact step portion 5b is formed from the shaft portion 5a toward the vertical downward direction that is opposite to the direction in which the lid 6 is taken out.
The flat surfaces 4 e and 5 c of the surface contact step portions 4 b and 5 b of the first shaft 4 and the second shaft 5 form contact surfaces that are in surface contact with the left and right side surfaces 6 a and 6 a of the lid 6.

As shown in FIGS. 4 to 6, the lid 6 has, on its left and right side surfaces 6 a, 6 a, a first bearing portion 7 that is rotatably fitted to the first shaft 4, and the second shaft 5. Is provided with a second bearing portion 8 that is rotatably fitted.
The first bearing portion 7 has a receiving hole 7a that rotatably receives the shaft portion 4a of the first shaft 4, and extends from the receiving hole 7a toward the end surface 6b of the lid 6, and the tip thereof is a lid. And a groove 7b opened at the end face 6b. The width of the groove 7b is substantially the same as the distance between the left and right cut surfaces 4c and 4c of the shaft portion 4a so that the cut surfaces 4c and 4c can be fitted therein.
The second bearing portion 8 is formed by a perfect hole that rotatably receives the shaft portion 5a of the second shaft 5.

  The shaft portion 4a of the first shaft 4 and the shaft portion 5a of the second shaft 5 are smoothly fitted into the receiving hole 7a and the second bearing portion 8 of the first bearing portion 7 of the lid 6, respectively. Each dimension is set so as to rotate in the direction. Further, when the lid 6 is opened and closed, the flat surfaces 4e and 5c of the surface contact step portions 4b and 5b of the first shaft 4 and the second shaft 5 are in surface contact with the left and right side surfaces 6a and 6a of the lid 6. Thus, no gap is formed between the two.

Next, the operation of the procedure for attaching and detaching the lid will be described.
In FIG. 7A, the receiving hole 7a of the first bearing portion of the lid 6 is fitted to the shaft portion 4a of the first shaft, and the second bearing portion 8 is fitted to the shaft portion 5a of the second shaft. By joining, the lid 6 is attached to the opening 2 of the case body 1.
In this state, the lid 6 can be opened and closed by pivoting upward from the horizontal closed posture shown by the phantom lines in FIGS. 1 and 2 with the shaft portions 4a and 5a as fulcrums. During the opening / closing operation, the flat surfaces 4e and 5c of the surface contact step portions 4b and 5b of the first shaft 4 and the second shaft 5 are brought into surface contact with the left and right side surfaces 6a and 6a of the lid 6 so as to be in between. Since the gap is formed so as not to occur, the lid 6 does not rattle in the left-right direction.

When the lid 6 is removed, as shown in FIG. 7B, the lid 6 is erected vertically so that the directions of the left and right cut surfaces 4c, 4c of the shaft portion 4a and the groove 7b coincide.
Next, as shown in FIG. 7 (c), the lid 6 is lifted so as to be slightly inclined with the shaft portion 5a as a fulcrum so that the side on which the first bearing portion 7 is provided is higher. At this time, since the groove 7b of the first bearing portion is opened in the direction opposite to the pulling direction, that is, downward, the surface step 4b on the upper pulling side is not obstructed, and the groove 7b is inserted into the shaft portion 4a. It can be made to slide along the cut surfaces 4c and 4c. Thereby, as shown in FIG.7 (d), the 1st bearing part 7 can be extracted upwards from the axial part 4a. Further, since the stepped portion 5b of the second shaft 5 is formed from the shaft portion 5a toward the vertical downward direction opposite to the direction in which the lid 6 is taken out, the lid 7 is tilted when the lid 6 is tilted. The side surface of this will not interfere with the contact step 5b.

  Moreover, when attaching the lid | cover 6, it carries out reverse to the above-mentioned procedure. That is, the lid 6 is set up vertically and attached as shown in (b) through the procedure of FIGS. 7 (d) to 7 (c). When the lid is attached, the surface step 4b of the first shaft 4 is provided above the shaft portion 4a (on the side in which the lid is taken out), so that the receiving hole 7a of the first bearing portion 7 is connected to the shaft portion. When fitted into 4a (see FIG. 7B), the side surface 6a of the lid 6 is in contact with the flat surface 4e of the contact step 4b. Thereby, the lid | cover 6 can be rotated, without interfering with the interview step part 4b.

  As mentioned above, although the typical Example of this invention was described, this invention is not necessarily specified to said embodiment. For example, in the above embodiment, the first shaft 4 and the second shaft 5 are formed integrally with the case main body 1, but these shafts are formed as separate members and are attached via attachment means such as screws or adhesives. May be attached to the case body 1. In addition, the object of the present invention can be achieved and modified or changed as appropriate without departing from the scope of the claims.

  INDUSTRIAL APPLICABILITY The present invention can be used in a lid support device that opens and closes a sample chamber of an analytical instrument such as a spectrophotometer.

DESCRIPTION OF SYMBOLS 1 Case main body 2 Opening part 4 1st axis | shaft 4a 1st axis | shaft axis | shaft part 4b 1st axis | surface contact | abutting step part 4c Cut surface 5 2nd axis | shaft 5a 2nd axis axis | shaft part 5b 2nd axis | shaft Interfacing step portion 6 Lid 7 First bearing portion 7a First bearing portion receiving hole 7b First bearing portion groove 8 Second bearing portion

Claims (1)

A first shaft and a second shaft formed on opposite inner surfaces of the opening of the case body;
A first bearing portion that is rotatably fitted to the first shaft, and a lid that is provided with a second bearing portion that is rotatably fitted to the second shaft;
The first shaft extends along the surface direction of the cut surface in a direction orthogonal to the axis of the shaft portion from a root portion of the shaft portion in which cut surfaces that are parallel to each other are formed on the left and right. The second shaft includes a cylindrical shaft portion, and a flat interview step portion extending in a direction perpendicular to the axis of the shaft portion at a root portion of the shaft portion. Consists of
The first bearing portion includes a circular receiving hole that rotatably receives the shaft portion of the first shaft, and a groove that extends from the receiving hole toward the end surface of the lid and has a tip that opens at the end surface of the lid. And the width of the groove is formed with substantially the same dimension as the interval between the left and right cut surfaces of the shaft portion,
The surface contact step of the first shaft extends from the shaft portion of the first shaft in the direction of taking out the lid, and the surface contact step of the second shaft takes out the cover from the shaft portion of the second shaft. An opening / closing device for a lid, characterized by extending in a direction opposite to the direction.

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