JP2009270665A - Undercarriage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To release an engagement by allowing an engagement body making the engagement to move as a whole in a direction separating from a leg part if a large force is applied to engaging parts of a lifting part to the leg part. <P>SOLUTION: An undercarriage includes the lifting part 2 which adjustably supports a supported body P with respect to height by being combined to the leg part 1 to make it possible to move along the axial direction and to engage in each moving position. The lifting part 2 is provided with a main body 20 which is provided with a through part 200 of the leg part 1 and a mounting part 201 to the supported body P, an engagement body 21 which is provided with a turning combination part 213 to the main body 20 and an engagement pawl part 214 to the leg part 1 and a restraining body 22 which elastically restrains turning of the engagement body 21 which is in the direction releasing the engagement of the engagement pawl part 214 to the leg part 1. The leg device is configured so that the turning combination part 213 of the engagement body 21 is moved to separate from the leg part 1 when a force exceeding a predetermined magnitude is applied to the lifting part 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

 The present invention relates to an improvement in a leg device having a function of being attached to various supported bodies to be a leg of the supported body and supporting the supported body in a height-adjustable manner.

  Patent Document 1 discloses a leg device including a leg shaft and a lifting body including a lock body having a female screw-like portion that meshes with a male screw portion of the leg shaft. The supported body is supported by the leg shaft via the lifting body.

However, in this type of leg device, when a larger load or impact than expected is applied to the supported body side, the force generated therefrom is structurally concentrated on the internal thread-like portion, so that the lock body has a certain amount. It had to be rigid.
JP 2006-64133 A

  The main problem to be solved by the present invention is that in this type of leg device, a large force is applied to the engaging part of the lifting part (lifting body in Patent Document 1) with respect to the leg part (leg shaft in Patent Document 1). In this case, the engagement body (the lock body in Patent Document 1) that engages the engagement is moved as a whole in the direction away from the leg parts to be solved.

To achieve the above object, according to the present invention, a leg device is combined with a leg part and the leg part so that the leg part can be moved along the axial direction and can be engaged with each other at each moving position. Elevating parts that support the height adjustable,
The lifting parts include a body with a leg part passage and a mounting part to a supported body, a rotating combination part to this body and a hooking claw part to the leg part, and a leg part. And a restricting body that elastically restricts the rotation of the engaging body in the direction of unlatching the engaging claws of
It is assumed that when a force exceeding a predetermined size is applied to the lifting parts, the turning combination part of the engaging body is moved away from the leg parts.

  Since the restricting body restricts the rotation of the engaging body in the direction in which the engaging claw part is engaged with the leg part, this allows the lifting part to be positioned at an arbitrary height and the supported body with the leg part. Can be supported. The support height of the supported body is adjusted by rotating the hooking body in the direction to unlock the hooking claws on the leg parts while elastically deforming the regulating body, and then moving the lifted parts together to the desired position. When it is moved and the rotation operation is stopped at this desired position, the engaging claw is again engaged with the leg part at this desired position by the elastic return of the restricting body, so that it can be done with one touch. If the engaging body is provided with an operation section that enables the engaging body to be rotated in the direction in which the restricting body is elastically deformed, the rotating operation can be easily performed. When the force as described above is applied to the lifting parts, the rotation combination part of the engagement body is moved in a direction away from the leg parts, so that the engagement body as a whole is separated from the leg parts. It is possible to prevent the engagement claw portion from being damaged by releasing the engagement with the engagement claw portion.

  The pivoting combination part of the engagement body is configured to have an axial shape that is elastically held at the end part of the leg hole side of the axial hole formed in the main body. If at least one of the hole walls in the length direction is configured to be elastically deformable, when the force is applied as described above, it is combined with the shaft hole from the end on the leg part side by elastic deformation. The hook part can be pulled out to unlock the hook part of the hook part of the leg part and the lifting part, and the rotation combination part is pushed into the end part of the leg part side of the shaft hole and held again. Thus, it is possible to return to the initial state in which the hooking claws of the hooking body are hooked to the leg parts again.

  In addition, if the rotating combination part and the engaging claw part are provided in the engaging body with an interval in the vertical direction, when the force is applied as described above, the shaft hole is effectively provided on the leg part side. The engaging body can be moved so as to allow the turning combination portion to come out of the end portion of the arm.

  According to the leg device of the present invention, when a large force is applied to the engaging part of the lifting part with respect to the leg part, the engaging part is moved away from the leg part to release the engaging part. Therefore, there is no problem even if the rigidity of the engagement body is not excessively increased, and therefore, the leg device can be downsized with less trouble for both the supported bodies.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS.

  Here, FIG. 1 shows a state in which an example of a leg device L configured by applying the present invention is attached to a supported body P and the supported body P is supported by the leg device L. The main part is shown in cross section. 2 to 7 show such a leg device L, and FIG. 8 shows an engagement body 21 constituting the lifting part 2 of the leg device L.

  9 shows a state in which the lifting / lowering part 2 is positioned at a position approximately in the middle of the vertical direction of the leg part 1, and FIG. 10 shows a state in which the hooking claw portion 214 is unlocked from the state of FIG. FIG. 11 shows a state in which the engagement body 21 is rotated. FIG. 11 shows a state in which a force exceeding a predetermined size is applied to the lifting part 2 and the rotation combination part 213 of the engagement body 21 is moved away from the leg part 1. The cross section of the main body 20 of the lifting part 2 is shown.

 The leg device L according to this embodiment is attached to various supported bodies P to become legs of the supported body P, and supports the supported body P so that the height of the supported body P can be adjusted (level adjustment). (Adjuster function).

  Specifically, such a leg device L forms, for example, a leg of a projector such as a so-called liquid crystal projector, a projector, or a slide projector, or attached to a lower end of a leg such as a tripod. Can be used. When this leg device L is used in such a projector, it is used to adjust the tilt angle of this projector by being provided at the lower part on the front side where the projection lens of this projector is provided. The height projected at which the image projected from the projection lens is projected on a screen or the like is used.

  The leg device L includes a leg part 1 and an elevating part 2.

  The leg part 1 is configured to have a rod shape with a lower end portion as a grounding portion 10. The leg part 1 is configured so that the outer shape of the cross section from the upper end to the grounding part 10 is substantially rectangular. The grounding portion 10 is larger than the outer diameter from the upper end portion 11 of the leg part 1 to the grounding portion 10, and a circumferential step surface 10 a facing upward is formed on the top of the grounding portion 10. The lower surface of the grounding portion 10 is an arc-shaped surface, and a cushion material 10b is attached to the lower surface. The leg part 1 is configured such that the cushion member 10b is grounded to a support surface M such as a floor surface, the ground, a table surface, etc., and the supported body P is supported on the support surface M or the like.

  On the grounding portion 10 of the leg part 1, a rack portion 13 that continues in the vertical direction is formed on one of the narrow side surfaces 12, 12. Each tooth of the rack portion 13 causes the cutting edge 13a to run along the horizontal direction, and the upper side of the cutting edge 13a is a hooking surface 13b for the hooking claw portion 214 of the hooking body 21 of the lifting part 2 to be described later, and below the cutting edge 13a. The ratchet mechanism is configured as described later in cooperation with the engaging claw portion 214 as an inclined surface 13c inclined so as to gradually reduce the vertical dimension of the tooth as it goes toward the blade edge 13a. ing.

  The elevating part 2 is combined with the leg part 1 so as to be movable along the axial direction (that is, the vertical direction) and to be able to engage with the leg part 1 at each moving position. And the to-be-supported body P is supported through this raising / lowering part 2 so that height adjustment is possible.

  The elevating part 2 includes a main body 20, an engagement body 21, and a regulation body 22.

  The main body 20 includes a through part 200 for the leg part 1 and an attachment part 201 to the supported body P. In this embodiment, the main body 20 includes a top plate portion 202 and a bottom plate portion 203 having a rectangular plate shape, and one side and the other side over the length direction of the top plate portion 202 and the bottom plate portion 203. And a side plate portion 204 provided therebetween. The vertical dimension of the main body 20 between the top plate portion 202 and the bottom plate portion 203 is smaller than the length of the leg part 1 on the grounding portion 10, and the main body 20 pushes the bottom plate portion 203 against the circumferential step surface 10 a of the grounding portion 10. In the axial direction of the leg part 1, the lower limit is the position to be hit, and the upper limit is the position where an unillustrated butting part formed inside the main body 20 is brought into contact with the retaining part 14 formed on the upper end part 11 of the leg part 1. It is combined so that it can slide up and down along. The top plate portion 202 and the bottom plate portion 203 are respectively formed with through holes 200a that follow the outline shape of the cross section of the portion located on the grounding portion 10 of the leg part 1, and this through hole 200a is formed through the through hole 200a. The unit 200 functions. The through hole 200a is formed so as to be biased toward one side in the width direction of the top plate portion 202 and the bottom plate portion 203, and the main body 20 has a storage space 205 for the leg part 1 between the two through holes 200a and 200a. The storage space 206 has a storage space 206 for holding the engagement body 21 at the side of the storage space. (Fig. 9)

  A pair of longitudinally divided grooves 207a and 207a and a pair of longitudinally divided grooves 207a and 207a are disposed on the side plate portions 204 and 204 of the main body 20 and located on the sides of the storage space 205 of the leg part 1 respectively. An elastic piece 207 is formed by a laterally divided groove 207b extending between the lower ends of the grooves 207a and 207a, and a hooking projection 207c is formed on the lower end side of the elastic piece 207. In this embodiment, the fitting portion Pa applied by the elastic piece 207 at a position where the main body 20 is fully fitted into the fitting portion Pa for mounting the leg device L formed on the supported body P. The engaging protrusion 207c applied to the engaging recess Pb formed in the above is engaged, and the leg device L can be attached to the supported body P by one touch. That is, in this embodiment, the hooking projection 207 c functions as the mounting portion 201.

  In addition, shaft holes 208 each having a long oblong shape in the lateral direction are formed through the side plate portions at both side plate portions of the main body 20 and located at the sides of the storage space 206 of the engagement body 21. Has been. In this embodiment, the rotation combination portion 213 of the engagement body 21 to be described later is configured to have an axial shape, and the rotation combination portion 213 has an elongated hole shape formed in the main body 20. The engagement body 21 is rotatably combined with the main body 20 by elastically holding the shaft hole 208 formed at the end 208a on the leg part 1 side. Specifically, the shaft hole 208 includes a holding portion 208b along a virtual circular arc that is substantially equal to the outer diameter of the rotation combination portion 213 that forms the shaft shape of the engagement body 21 with the end portion 208a on the leg part 1 side. In addition, a groove-like portion 208d having a width slightly narrower than the outer diameter of the rotation combination portion 213 is formed between the end portion 208c opposite to the side where the holding portion 208b is formed and the holding portion 208b. A split groove 209 extending in the lateral direction so as to be substantially parallel to the shaft hole 208 is formed below the shaft hole 208, and a groove-like portion 208d of the shaft hole 208 and the split groove 209 are formed. Are communicated with each other by a longitudinal communication groove 211 that forms an elastic piece 210 having the leg part 1 side as a base. Thereby, in this embodiment, one of the hole walls in the length direction of the shaft hole 208 is configured to be elastically deformable.

  In the upper part of the shaft hole 208, the rotation combination part 213 of the engaging body 21 is located on the inner side of the edge of the side plate part 204 located on the other side in the width direction of the top plate part 202, and the shaft hole 208. A contact portion 212 is formed so as to face the inner surface of the regulating body 22 described later in the combined state held by the holding portion 208b.

  The engagement body 21 includes a rotation combination portion 213 for the main body 20 and an engagement claw portion 214 for the leg part 1. In this embodiment, the engaging body 21 has a base 215 having a width that can be accommodated in the storage space 206 and inserted between the side plate portions 204, 204 of the main body 20. The protruding portion 216 protruding upward from the end 215a, that is, the side facing the leg part 1, and the protruding portion 216 that is outside the protruding portion 216 and protrudes upward from the base portion 215. And a regulating body 22 configured as an elastic plate piece.

  The hooking claw 214 is formed at the inner end 215 a of the base 215. In the illustrated example, the hooking claw portion 214 is formed in a rib shape extending in the width direction of the base portion 215, and is provided with two strips with an interval corresponding to the pitch of the adjacent teeth of the rack portion 13. The engaging claw portion 214 has an upper portion as an inclined surface 214a that aligns with the inclined surface 13cb of the rack portion 13 and a lower portion as an engaging surface 214b that aligns with the tooth engaging surface 13b of the rack portion 13.

  At the upper end of the protruding portion 216 and on the side facing the side plate portion 204 of the main body 20, a rotation combination portion 213 having a short cylindrical shaft shape is formed so that the axis line is arranged horizontally. Yes. The engagement body 21 is rotated around the rotation combination portion 213 by inserting the two rotation combination portions 213 into the holding portions 208b of the corresponding shaft holes 208 of the main body 20 and holding them. It is combined with the main body 20 as possible.

  The leg parts 1 are combined in such a direction that the rack portion 13 faces the storage space 206 side of the engaging body 21 with respect to the main body 20 of the lifting body. The restricting body 22 of the engaging body 21 combined with the main body 20 as described above is positioned so as to abut against the abutting portion 212 of the main body 20, and the engaging claw 214 is the rack portion 13 of the leg part 1. It is positioned at the position where it meshes with. (FIG. 9) That is, in this embodiment, the engaging body 21 is provided with a restricting body 22 that elastically restricts the rotation of the engaging body 21 in the direction to unlock the engaging claw 214 from the leg part 1. And integrated.

  Further, in this embodiment, the outer end 215b side of the base 215 of the engaging body 21 extends from the storage space 206 to the outside of the main body 20, and the restricting body 22 applied to the extended portion is elastic. An operating portion 217 that enables the engaging body 21 to be rotated in a direction to be deformed is provided. In this embodiment, the operation portion 217 has a plate shape that is long in the lateral direction, and is integrally connected to the outer end 215b of the base portion 215 of the engagement body 21 at the middle of the side portion in the length direction. I am letting.

  Since the restricting body 22 restricts the rotation of the engaging body 21 in the direction in which the engaging claws 214 are unengaged with the leg parts 1, the lifting / lowering part 2 is positioned at an arbitrary height to be supported. The body P can be supported by the leg parts 1. The support height of the supported body P is adjusted by moving the engaging body 21 in the direction to release the engaging claw 214 from the leg part 1 while elastically deforming the restricting body 22 and then raising and lowering the supported body P together. When the part 2 is moved to a desired position and the rotation operation is stopped at the desired position, the engaging claw 214 is again engaged with the leg part 1 at the desired position by the elastic return of the restricting body 22. Can be done with a single touch. (FIG. 10) In this embodiment, the operation of the engaging portion 21 can be easily performed by the operation portion 217. Further, in this embodiment, the rack part 13 and the engaging claw part 214 of the leg part 1 have an inclined surface 13c formed on the lower side of the teeth of the rack part 13 in the engaged state above the engaging claw part 214. Therefore, even if the engaging body 21 is not rotated using the operating portion 217, the upward / downward movement of the lifting / lowering part 2, that is, the supported body P is restricted. 22 can be sequentially performed while causing elastic deformation, and the supported body P can be supported at the position where the movement is stopped. In other words, in this embodiment, the rack portion 13 and the engaging claw portion 214 constitute a ratchet mechanism that allows only the upward and downward movement of the elevating part 2 at a free stop.

  Further, in this embodiment, when a force exceeding a predetermined magnitude is applied to the lifting part 2, the turning combination part 213 of the engaging body 21 is moved in a direction away from the leg part 1. It has become. (FIG. 11) In this embodiment, typically, when a downward load or impact of a predetermined magnitude is applied to the elevating part 2 through the supported body P, it is relatively upward. Due to the moved leg parts 1, a force is applied to the engaging body 21 in the direction to extract the rotating assembly portion from the holding portion 208 b of the shaft hole 208 via the engaging claw portion 214, and thereby the rotation combining portion 213. However, the engagement between the rack part 13 and the engagement claw part 214 is also released from the leg part 1.

  Thereby, in the leg apparatus L concerning this embodiment, when the above force is applied, the engagement between the leg part 1 and the engagement claw part 214 of the engagement body 21 of the elevating part 2 is released. Thus, it is possible to prevent the hooking claw portion 214 from being damaged. As a result, the leg part 1 and the engaging body 21 can be configured by the plastic material without any trouble, and the leg device L can be downsized with little trouble.

  In this embodiment, the rotation combination portion 213 of the engaging body 21 is a shaft that is elastically held at the end of the shaft hole 208 formed in the main body 20 on the leg part 1 side of the shaft hole 208. More specifically, since at least one of the hole walls in the length direction of the shaft hole 208 is configured to be elastically deformable, the action of the force as described above can be achieved. When this is done, the rotation combination part 213 is pulled out from the end part 208a on the leg part 1 side of the shaft hole 208 by elastic deformation, and the engagement part 214 of the engagement part 21 of the leg part 1 and the lifting part 2 is engaged. After that, the rotation combination portion 213 held by the elastic piece 210 on the end portion 208c side is pushed into the end portion 208a on the leg part 1 side of the shaft hole 208 and then held again, thereby again. Leg par Engaging claw portions 214 of 1 to hooking body 21 can be made to return to the initial state to be engaged.

  In this embodiment, since the rotation combination portion 213 and the engaging claw portion 214 are provided in the engaging body 21 with a space in the vertical direction, when the force is applied as described above. Thus, the engaging body 21 can be moved so that the rotation combination portion 213 is effectively pulled out from the end of the shaft hole 208 on the leg part 1 side.

Main part fracture block diagram which showed the use condition of the leg apparatus L Left side view of leg device L Same side view Rear view Front view Plan view Bottom view Perspective view of the hook 21 Side view of main part of leg device L Side view of main part of leg device L Side view of main part of leg device L

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Leg part 2 Lifting part 20 Main body 21 Engagement body 22 Restriction body 200 Through part 201 Attachment part 213 Rotation combination part 214 Engagement nail | claw part P Supported body

Claims (5)

A leg part and a lifting part that supports the leg part so that it can be moved along its axial direction and can be engaged at each movement position so as to be adjustable in height.
The lifting parts include a body with a leg part passage and a mounting part to a supported body, a rotating combination part to this body and a hooking claw part to the leg part, and a leg part. And a restricting body that elastically restricts the rotation of the engaging body in the direction of unlatching the engaging claws of
A leg device characterized in that when a force exceeding a predetermined magnitude is applied to the lifting part, the turning combination part of the hook is moved away from the leg part.   The rotation combination portion of the hook is configured to have a shaft shape that is elastically held at the end of the shaft hole formed in the main body on the leg part side. The leg device according to claim 1.   The leg device according to claim 2, wherein at least one of the hole walls in the length direction of the shaft hole is configured to be elastically deformable.   The leg device according to any one of claims 1 to 3, wherein the rotation combination portion and the hooking claw portion are provided in the hooking body with an interval in the vertical direction.   The operation part which enables rotation operation of this engagement body of the direction which elastically deforms a control body is provided in the engagement body, The any one of Claims 1-4 characterized by the above-mentioned. Leg device.

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