JPH11153527A - Article holding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a holding device which prevents an article such as a sample, a product or the like to be tested from being moved from a prescribed position and which holds a article by a proper force so as not to be damaged or broken. SOLUTION: An article receiver part 3 and a guide part 4 are installed on a pedestal 2 in positions which are separated by a distance suit able for receiving an article 1. A driving screw part 5a at a pressure screw 5 is screwed to a nut part at the guide part 4. The diameter in a part of the pressure screw 5 is reduced so as to form an adjusting part 5b having an adjusting screw 5c. An operation knob 6 is play-fitted to the adjusting part 5b. An adjusting nut 7 is screwed to the adjusting screw 5c. A pressure spring 9 is interposed between the adjusting nut 7 and the operation knob 6. By its rotating force, the side face of the operating knob 6 is pressed to a wall face in a step by the driving screw part 5a at the pressure screw 5 and by the adjusting part 5b. Then, the turning of the operation knob 6 is transmitted to the pressure screw 5 by a frictional force between the side face and the wall face.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an article holding device for holding a sample or a product for a test or inspection, or for holding a product so as not to be damaged during transportation. It is.

[0002]

2. Description of the Related Art When performing various tests on a product or a sample, it may be inconvenient if the product is displaced from a predetermined position such as a test stand. In such a case, the product is held. It is necessary to prevent deviation from a predetermined position. In addition, when the product is moved and vibration is transmitted to the product and the product moves, it may be inconvenient. In such a case, it is necessary to appropriately hold the product.

Therefore, an article holding device is used to hold a product or a sample at a predetermined position or a predetermined state. In this article holding device, for example, a support base is provided with a product receiving portion and a guide portion at appropriate intervals for receiving a product, and a nut portion is formed at an appropriate position of the guide portion, and the nut portion is formed. It has a structure in which pressing screws are screwed. That is, the product is positioned between the receiving portion and the guide portion, and the pressing screw is rotated to move forward to make the front end contact the product, and the product is clamped between the front end of the pressing screw and the product receiving portion. It is like that.

However, since the pressing screw is rotated manually, it is difficult to hold the product with an appropriate holding force. If the holding force is weak, the product may not be held and may come off. If the holding force is too strong, the product may be damaged or broken. For this reason, it is conceivable to use a torque limiter, but it is expensive to use this kind of article holding device, which is not preferable.

As a mechanism for preventing an overload on the drive system, for example, there is a sample stage drive of an X-ray analyzer described in Japanese Utility Model Laid-Open No. 60-98049. In the sample stage driving device described in this publication, a driven pulley is fitted to a screw rod screwed with the sample stage, and a driving pulley paired with the driven pulley is freely rotatably fitted to a rotary shaft. A pressing block is fitted to one end of the rotating shaft so as to be movable in the axial direction on the rotating shaft, a wave washer is interposed between the pressing block and the driving pulley, and the driving pulley is connected to the pressing block. The structure is such that an operation handle is fitted to the other end of the rotating shaft by pressing against the flange on the opposite side. That is, when the rotating shaft is rotated by operating the operation handle, the driving pulley rotates due to the frictional force between the driving pulley and the flange generated by being pressed by the wave washer, thereby rotating the driven pulley. For this reason, the screw rod on which the driven pulley is fitted rotates, and the sample stage screwed with this screw rod advances and retreats. When overloaded, the rotating shaft and the driving pulley idle against the frictional force.

Although this drive device prevents overload from being applied to the drive system when the sample stage is driven, this overload prevention mechanism is used in an article holding device to ensure that products and the like are securely held. It is also possible to provide a mechanism for holding and preventing breakage.

[0007]

However, when an article holding device is used by using the above-described overload prevention mechanism of the sample stage driving device, there are the following problems. Since the driving force is transmitted via the pulley, the screw rod and the rotating shaft are not on the same axis, which increases the number of parts and increases the size of the device. Also, the magnitude of the load that allows transmission will depend on the restoring force of the wave washer,
In order to adjust the magnitude of the load that allows transmission, it was necessary to replace the wave washers or increase or decrease the number.

Accordingly, an object of the present invention is to reduce the size of a load with a simple structure, easily adjust the size of a load allowing transmission, and to remove a held article,
An object of the present invention is to provide an article holding device that is not damaged.

[0009]

According to a first aspect of the present invention, there is provided an article holding apparatus provided on a pedestal, the article to be placed on the pedestal and held. , A guide portion provided on the pedestal at an appropriate distance from the article receiving portion, a nut portion being formed in part, a pressing screw screwed to the nut portion, and the pressing screw And an operation knob detachably engaged with the pressing screw, an article is positioned between the article receiving portion and the guide portion, and the tip of the pressing screw is brought into contact with the tip to make contact with the tip. The article is held between the article receiving portion and the operation knob and the pressing screw are engaged and disengaged via a friction clutch mechanism. When the operation knob is engaged, the pressing screw is rotated by the rotation of the operation knob. Pressing by rotation Di is characterized by not rotate.

When the operation knob is rotated, the pressing screw is rotated via the friction clutch mechanism. Therefore, the pressing screw advances and retreats with respect to the guide portion according to the rotation direction. When the article to be held is arranged between the article receiving section and the guide section, and the pressing screw is rotated to move forward, the article is held between the tip of the pressing screw and the article receiving section. When the pressing screw appropriately presses the article, the load increases and the friction clutch mechanism slips. Even if the operation knob is rotated, the pressing screw does not rotate and does not move forward. For this reason, goods are not overloaded,
In addition, it is not held inadvertently by being pinched by an appropriate force.

When the operation knob is rotated in a direction opposite to the direction in which the article is held, the pressing screw is rotated via the friction clutch mechanism, and the rotation causes the screw to retreat, thereby releasing the constraint on the article.

According to a second aspect of the present invention, there is provided an article holding device provided on a pedestal, for pressing an article to be held and held on the pedestal, at an appropriate distance from the article receiving section. A guide screw provided on the pedestal and partially formed with a nut portion, a pressing screw having a drive screw portion screwed to the nut portion, and having an adjusting portion smaller in diameter than the drive screw portion. An operation knob loosely fitted to the adjustment portion of the pressing screw, an adjustment member fitted to the adjustment portion of the pressing screw and movable in the axial direction of the adjustment portion and fixed at an appropriate position; A pressing spring interposed between the adjusting member and the restoring force of the pressing spring in a direction of pressing the side surface of the operation knob against the wall surface of the stepped portion between the driving screw portion and the adjusting portion. It is characterized by:

That is, the wall surface of the stepped portion between the drive screw portion and the adjusting portion and the side surface of the operation knob are pressed by a pressing spring to form a friction clutch mechanism, and a frictional force is generated between the wall surface and the side surface. Occurs. When the operation knob is turned, the pressing screw is turned by the frictional force, and moves forward and backward with respect to the guide portion. When the tip of the pressing screw abuts on the article and the article is clamped between the tip and the article receiving portion with an appropriate force, the advancement of the pressing screw is prevented, and when the reaction force is in a state resisting the frictional force, Slippage occurs between the wall surface and the side surface, and the pressing screw does not rotate even when the operation knob is rotated, so that the article is held by an appropriate force without being overloaded.

By selecting appropriate materials for the operation knob and the pressing screw, an appropriate frictional force is generated between the side surface of the operation knob and the wall surface.

The restoring force of the pressing spring is adjusted by moving the adjusting member with respect to the adjusting portion and changing the distance between the adjusting member and the operation knob.

The adjustment member can be easily moved with respect to the adjustment portion, and can be stopped at a desired position.
An article holding device according to a third aspect of the invention is characterized in that an adjusting screw portion is formed in a part of the adjusting portion, and an adjusting nut screwed to the adjusting screw portion is provided as an adjusting member.

That is, when the adjusting nut is rotated, the adjusting nut advances and retreats with respect to the adjusting screw portion, so that the distance between the adjusting nut and the operation knob is changed. Moreover, the adjusting nut can be stopped at a desired position.

The position of the adjusting nut with respect to the adjusting screw may be deviated due to the rotation of the adjusting nut due to vibration during transportation of the article. Therefore, an article holding device according to a fourth aspect of the invention is characterized in that a fixing screw is screwed into the adjusting nut, and the adjusting nut is fixed to the adjusting portion by tightening the fixing screw.

When the fixing screw is tightened and its tip is pressed against the adjusting screw, the adjusting nut does not rotate due to vibration, and the position of the adjusting nut with respect to the adjusting screw does not shift.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An article holding apparatus according to the present invention will be specifically described below based on a preferred embodiment shown in the drawings.

FIG. 1 shows an outline of the article holding apparatus. An article receiving section 3 for pressing the article 1 is provided at an end of a base 2 on which the article 1 is placed. The surface of the article receiving portion 3 that receives the article 1 is formed in a shape suitable for receiving the article 1, and is formed in a plane in this embodiment. A guide part 4 is provided on the other end side of the pedestal 2, and a nut part is formed at an appropriate position of the guide part 4. The driving screw 5a of the pressing screw 5 is screwed into the nut. In addition, this pressing screw 5
Is perpendicular to the surface of the article receiving portion 3 that receives the article 1, and the tip is formed by a part of an appropriate spherical surface.

At the base end of the driving screw portion 5a of the pressing screw 5, an adjusting portion 5b having a diameter smaller than the outer diameter of the driving screw portion 5a is provided.
Are continuous, and an adjustment screw
5c is formed. An operation knob 6 is loosely fitted to the adjusting portion 5b, and a side surface of the operation knob 6 and a driving screw portion 5a
A wall surface of a step formed at a connecting portion between the adjusting portion 5b and the adjusting portion 5b is brought into surface contact. An adjusting nut 7 as an adjusting member is screwed into the adjusting screw portion 5c. A fixing screw 8 is fixed to the adjusting nut 7 so that the axial direction of the fixing screw 8 is orthogonal to the axial direction of the pressing screw 5. In this state, the tip of the fixing screw 8 comes into contact with the adjusting screw 5c. A pressing spring 9 made of a compression coil spring is interposed between the operating knob 6 and the adjusting nut 7. The operating knob 6 receives the restoring force of the pressing spring 9, and the side surface of the operating knob 6 is It is designed to be pressed against the wall of the step.

The operation of the article holding apparatus according to the present invention constituted as described above will be described below.

The operation knob 6 is rotated while the article 1 to be held is placed at a position between the article receiving section 3 and the guide section 4 of the pedestal 2. Since the operating knob 6 is pressed against the wall surface of the step portion of the pressing screw 5 by the restoring force of the pressing spring 9, the pressing screw 5 is rotated by the frictional force generated between the operating knob 6 and the wall surface. Since the driving screw 5a of the pressing screw 5 is screwed with the nut of the guide 4, the pressing screw 5 advances and retreats with respect to the guide 4 according to the direction of rotation. When the operation knob 6 is turned in the forward direction, the pressing screw 5 advances in the direction of the article 1, and when the operation knob 6 is turned in the reverse direction, the pressing screw 5 retreats in the direction away from the article 1. Shall be.

When the operation knob 6 is turned in the forward direction, the pressing screw 5 is turned in the same direction, and is advanced by screwing with the nut of the guide portion 4. When advanced to an appropriate position, the tip of the pressing screw 5 comes into contact with the article 1, and the article 1 is sandwiched between the tip of the pressing screw 5 and the article receiving section 3. When the state is sandwiched by an appropriate force, the pushing screw 5 is prevented from advancing, so that the reaction force becomes larger than the frictional force between the side surface of the operation knob 6 and the wall surface of the step portion. Slip occurs between the two. For this reason,
Even if the operation knob 6 is rotated, the pressing screw 5 does not rotate,
Therefore, since the article 1 does not move forward, the article 1 is not pressed and the article 1 is not overloaded. For this reason, the article 1 is prevented from being damaged or damaged, and is held by an appropriate force so that the article 1 does not shift its position due to vibration during transportation and the like, and the held state is maintained. Is done.

When removing the article 1, the operation knob 6 is turned in the opposite direction. In this case, since the reaction force does not occur, the pressing screw 5 rotates in the same direction due to the frictional force between the side surface of the operation knob 6 and the wall surface of the stepped portion of the pressing screw 5, You will retreat. Therefore, the article 1 is released from the restraint and can be removed.

The frictional force can be adjusted by changing the magnitude of the restoring force of the pressing spring 9. The magnitude of the restoring force of the pressing spring 9 is adjusted by changing the distance between the operation knob 6 and the adjustment nut 7. That is, since the adjusting nut 7 is screwed with the adjusting screw portion 5c, by rotating the adjusting nut 7, the position of the adjusting nut 7 with respect to the adjusting screw portion 5c is changed. The distance from the knob 6 is changed. When the fixing screw 8 is tightened in a state where the adjusting nut 7 is located at an appropriate position, the adjusting screw portion of the adjusting nut 7 is adjusted.
The position with respect to 5c is fixed, and there is no accidental loosening due to vibration or the like.

As described above, by utilizing the frictional force between the side surface of the operation knob 6 and the wall surface of the stepped portion of the pressing screw 5, the pressing screw 5 of the rotating power input from the operation knob 6 is used.
Therefore, the material of the operation knob 6 and the pressing screw 5 is selected so that the frictional force becomes appropriate. For example, by using a synthetic resin for the operation knob 6 and a metal for the pressing screw 5, an appropriate frictional force is generated, so that it is easy to perform a desired intermittent power transmission.

[0029]

As described above, according to the article holding device of the present invention, the pressing screw for holding the article is rotated by the rotation of the operation knob, and the rotation force is transmitted between them. Since the operation is performed by the friction clutch mechanism, the transmission of the rotational power is cut off with the pressing screw appropriately pressing the article. Therefore, the article can be held with an appropriate force, and the article is prevented from being damaged or damaged, and the article is prevented from being moved carelessly.

According to the article holding device of the second aspect of the present invention, the restoring force of the pressing spring is adjusted by changing the position of the adjusting member with respect to the adjusting portion, and the friction between the operating knob and the pressing screw is adjusted. The power can be adjusted.

In the article holding device according to the third aspect of the present invention, the adjusting screw is formed in the adjusting portion, and the adjusting member is constituted by the adjusting nut screwed to the adjusting screw. The position of the adjusting nut can be changed only by turning the screw with respect to the screw portion, the frictional force can be easily adjusted, and the force for holding the article can be easily adjusted.

Further, according to the article holding device of the present invention, the position of the adjusting nut can be fixed by tightening the fixing screw.

[Brief description of the drawings]

FIG. 1 is a view schematically showing an article holding device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Article 2 Pedestal 3 Article receiving part 4 Guide part 5 Pressing screw 5a Drive screw part 5b Adjusting part 5c Adjusting screw part 6 Operating knob 7 Adjusting nut (adjusting member) 8 Fixing screw 9 Pressing spring

Claims (4)

[Claims] 1. An article receiving part provided on a pedestal and pressing an article to be placed and held on the pedestal, provided on the pedestal at an appropriate distance from the article receiving part, and a nut part And a pressing screw screwed into the nut portion, and an operation knob that is loosely fitted to the pressing screw and is detachable from the pressing screw, and the article receiving portion and the guide portion An article is positioned between the two, and the tip of the pressing screw is brought into contact with the tip to clamp the article between the tip and the article receiving portion, and the operation knob and the pressing screw are engaged and disengaged via a friction clutch mechanism, An article holding device wherein the pressing screw is rotated by the rotation of the operation knob when engaged, and the pressing screw is not rotated by the rotation of the operation knob when sliding. 2. An article receiving part provided on the pedestal and pressing an article to be placed and held on the pedestal, and provided on the pedestal at an appropriate distance from the article receiving part, and a nut part A pressing screw having a guide portion formed with a driving screw portion screwed to the nut portion and having an adjusting portion smaller in diameter than the driving screw portion, and is loosely fitted to the adjusting portion of the pressing screw. An operating knob, an adjusting member fitted into the adjusting portion of the pressing screw and movable in the axial direction of the adjusting portion and fixed at an appropriate position; and a pressing spring interposed between the operating knob and the adjusting member. The restoring force of the pressing spring is urged in a direction of pressing a side surface of the operation knob against a wall surface of a stepped portion of the driving screw portion and the adjusting portion. 3. The article holding device according to claim 2, wherein an adjusting screw portion is formed in a part of the adjusting portion, and an adjusting nut screwed to the adjusting screw portion is provided as an adjusting member. 4. A fixing screw is screwed into the adjusting nut,
The article holding device according to claim 3, wherein the adjustment nut is fixed to the adjustment portion by tightening the fixing screw.