JP2003014191A - Elevation leg apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent application of an upward movement force to an elevation body in spite of rotation when a leg shaft is turned from the maximum elevation position of the elevation body. SOLUTION: This elevation leg apparatus is provided with the elevation body 1 supporting an object to be supported M from the lower side, the leg shaft 2 passed through the elevation body 1 for supporting it movably upward/ downward, a ground body 3 installed to the lower end of the leg shaft 2 and turning it by a twisting operation, and a stopper body 4 mounted to the upper end of the leg shaft 2 for preventing it from coming off from the elevation body 1. The elevation body 1 is provided with a lock body 11 having a hooking par 11 engaging with an external thread part 20 in the leg shaft 2. In the leg shaft 2, a part positioned on the lateral side of the hooking part 11a in the lock body 11 in the maximum elevation position of the elevation body 1, a screwless part 21 is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting body which is attached to a supporting object and supports the supporting object from below, and a bolt-shaped body which is inserted into the lifting body and supports the lifting body so as to be able to move up and down. The present invention relates to an improvement of an elevating leg which includes a leg shaft and supports such an object to be height-adjustable.

[0002]

2. Description of the Related Art An elevating body (mounting case, adjusting device main body) attached to a supporting object to support the supporting object from below, and an elevating body which is inserted into the elevating body to support the elevating body so that the object can be elevated. Equipped with bolt-shaped leg shafts (legs, screw shafts),
Disclosed is a leg device in which a lock body (lock lever, screw piece) having a female screw portion that engages with a male screw portion of the leg shaft is incorporated in the elevating body in a state in which it can be operated in a direction to release the engagement. ing. (Unexamined-Japanese-Patent No. 11-828 of publication of an open patent publication)
Adjustment leg for equipment according to No. 81, JP-A-10-103331
One-touch adjuster related to the issue)

In these legs, the male screw of the leg shaft is rotated by twisting and operating the grounding body (grounding portion, leg seat) attached to the lower end of the leg shaft. The elevating body having the lock body having a female screw portion that engages with the portion can be gradually moved up and down.

[0004]

However, in these conventional leg fittings, the stopper body (washer, stopper plate) attached to the upper end of the leg shaft is located at the position where the lifting body abuts from below. The lifting / lowering body is set to the maximum raised position.

Therefore, in these conventional legs,
When the twisting operation of the grounding body is continued so as to rotate the leg shaft in the direction of further moving the lifting body at the maximum lift position, the lifting body is further moved to the lifting body. Since the force in the direction to be applied is applied, the stopper body may be pressed from below by the elevating body, causing the stopper body to come off from the leg shaft. Further, even if such upward movement force is continuously applied to the lifting body, the stopper body restricts the upward movement of the lifting body, so that the male screw of the rotating leg shaft is rotated. There is a possibility that the portion may crush the female screw portion of the lock body and cause damage to the lock body.

Therefore, according to the present invention, the leg shaft for supporting the elevating body is further rotated from the state in which the elevating body in this type of leg is in the maximum raised position is rotated in a direction for moving the elevating body upward. Also, the main purpose is to prevent a force in the upward moving direction from being applied to the elevating body by this rotation.

[0007]

In order to achieve the above object, in the invention according to claim 1, the lifting leg has the following constitutions (1) to (6). (1) An elevating body that is attached to a supporting object and supports the supporting object from below; (2) a bolt-shaped leg shaft that is inserted into the elevating body and supports the elevating body so that the elevating body can move up and down; 3) A grounding body which is attached to the lower end of the leg shaft and rotates the leg shaft by a twisting operation,
(4) A stopper body attached to an upper end of the leg shaft to prevent the leg shaft from coming out of the elevator body is provided. (5) The elevator body is attached to the male screw portion of the leg shaft. A lock body having a hooking portion that engages from the side of the shaft, and the lock so that the lock body is moved in a direction in which the engagement portion of the lock body and the leg shaft are disengaged by an operation from outside the lifting body. And a lever body that is linked to the body, and (6) the engaging portion of the lock body at the maximum raised position of the elevator body in which the elevator body is abutted against the stopper body from below in the leg shaft. A non-screwed portion is formed in a portion located laterally of the.

According to this structure, first, by twisting and operating the grounding body, the leg shaft is moved up and down so as to change the engagement position between the engagement portion of the lock body and the male screw portion of the leg shaft. The object to be supported can be gradually moved up or down, and the distance between the grounding body and the lifting body can be changed by the forward or backward movement to gradually raise or lower the supporting object. it can. (Fine adjustment function)

Further, the elevating body can be lifted up to a position where the elevating body abuts against the stopper body from below by twisting the grounding body.

Further, by operating the lever body, the lock body can be rotated so as to disengage the engagement portion and the male screw portion of the leg shaft, and by this rotation, the leg shaft. The elevating body can be largely moved to an arbitrary position over the length direction of. (Significant adjustment function)

Further, when the elevating body has reached the maximum raised position by the twisting operation of the grounding body, the engagement of the lock body and the leg shaft can be released by the screwless portion. it can.

As a result, even if the twisting operation of the grounding body is continued so as to rotate the leg shaft in the direction to move the lifting body further upward at the maximum lifted position, the lifting body does not The force of the above-mentioned upward movement is not applied, and the stopper body may come off from the leg shaft, which may occur when such a force is further applied to the elevating body at the maximum rising position. Also, the engagement of the lock body is not damaged.

The invention according to claim 2 is characterized in that, in the lifting leg according to claim 1, the small diameter portion of the leg shaft is a non-threaded portion.

According to this structure, when the grounding body is twisted from the maximum lifted position of the lifting body in a direction to lower the lifting body, the lifting body receives the weight of the supporting object. The engaging portion of the lock body can be re-engaged with the male screw portion from the end of the male screw portion facing the lower end side of the leg shaft in the screwless portion, whereby the grounding in such a direction can be performed. The lifting body can be smoothly moved downward again by twisting the body.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Typical embodiments of the present invention will be described below with reference to FIGS. 1 to 31.

It should be noted that FIGS. 1 and 2 show the lifting leg in a state as viewed from the side, and FIG. 3 shows it in a state as viewed from above. Further, FIGS. 4 to 8 each show such a lifting leg as a cross-sectional state. In particular, FIG. 4 shows a state in which the lifting body 1 is lowered to the lowest position, and FIGS. 6 and 7 show states in FIG. FIG. 6 shows a state in which the lever body 12 has been operated to be rotated from FIG.
7 shows a state in which the load of the support target M is applied to FIG. 7, and FIG. 7 shows a state in which the load of the support target M is not applied to the lift 1.
Shown respectively. Further, in FIG. 8, the lifting body 1 is at the maximum raised position, and the screwless portion 21 of the leg shaft 2 is the lock body 11.
It shows a state of being positioned to the side of the engaging portion 11a. Further, FIG. 9 shows the respective members constituting the lifting leg in a separated manner. 10 to 15 show the upper case 108 constituting the case body 10 in the lifting leg, respectively, and FIGS.
Shows the lower case 101 constituting the case body 10, FIGS. 23 to 27 respectively show the lever body 12 incorporated in the case body 10, and FIG.
8 to 30 show lock bodies 11 incorporated in the case body 10, respectively. Further, FIG. 31 shows the pedestal.

The lifting leg according to this embodiment is attached to a supporting object M such as furniture or home electric appliances and supports the supporting object M from below, and the lifting body 1
It is equipped with a bolt-shaped leg shaft 2 which is inserted into the upper and lower parts to support the elevating body 1 so that the elevating body 1 can be moved up and down.

Typically, the supporting object M is a projector such as a so-called liquid crystal projector, a projector, a slide projector, or the like. When the lifting leg is used in such a projector, the projection is performed. It is provided in the lower part of the front side where the projection lens of the projector is provided and is used to adjust the tilt angle of the projector, which allows the image projected from the projection lens to be displayed on a screen or the like. Used to adjust position.

The elevating body 1 includes a case body 10, a lock body 11 assembled in the case body 10, and a lever body 12 capable of releasing the engagement of the lock body 11 with the leg shaft 2. ing.

By attaching the case body 10 to the lower portion of the supporting object M, the supporting object M is supported from below by the elevating body 1.

Further, the leg shaft 2 whose protrusion size from the upper part of the elevating body 1, that is, the upper part of the case body 10 is changed by elevating the elevating body 1 attached to the supporting object M in this way, Typically, it is to be housed in the accommodation space Ma of the leg shaft 2 formed in the supporting object M.

At the lower end of the leg shaft 2, a grounding body 3 is attached.
Is provided. Typically, the grounding body 3 is formed in a dial shape having a dome-shaped lower grounding surface and the like, and is configured so that the grounding body 3 can be easily gripped and twisted.

Further, the lock body 11 is composed of the leg shaft 2
On the other hand, in the case body 10, there is an engaging portion 11a that engages with the male screw portion 20 of the leg shaft 2 from the side portion of the leg shaft 2.

As a result, according to the lifting leg of this embodiment, by twisting and operating the grounding body 3, the engaging portion 11a of the lock body 11 and the male screw portion 20 of the leg shaft 2 are connected. The leg shaft 2 can be screwed forward or backward with respect to the lifting body 1 so as to change the engagement position, and the distance between the grounding body 3 and the lifting body 1 can be changed by this screwing forward or backward. The support target M can be gradually lifted or gradually lowered and lowered. (Fine adjustment function)

A stopper body 4 is provided at the upper end of the leg shaft 2 to prevent the leg shaft 2 from coming out of the lifting body 1. The elevating body 1 can be lifted up to a position where the elevating body 1 is abutted against the stopper body 4 from below by twisting the grounding body 3.

Further, a screwless portion 21 is formed on a portion of the leg shaft 2 which is located on the side of the engaging portion 11a of the lock body 11 at the maximum raised position of the elevating body 1.

As a result, according to the lifting leg according to the present embodiment, when the lifting body 1 reaches the maximum raised position by the twisting operation of the grounding body 3, the screwless portion 21 is used. The engagement between the engagement portion 11a of the lock body 11 and the leg shaft 2 can be released.

As a result, at the maximum raised position, the leg shaft 2 is moved in a direction to move the lifting body 1 further upward.
Even if the twisting operation of the grounding body 3 is continued so as to rotate, the elevating body 1 is not subjected to a force in a direction to move further upward, and such a force is exerted at the maximum rising position. Does not cause the stopper body 4 to be disengaged from the leg shaft 2 and the engagement portion 11a of the lock body 11 to be damaged, which may occur when the lock body 11 is further acted on.

Further, in this embodiment, the small diameter portion 22 of the leg shaft 2 serves as the screwless portion 21.

That is, in the leg shaft 2, the leg shaft 2 in the unthreaded portion 21 is larger than the diameter of the leg shaft 2 at the apex position of the screw thread of the male screw portion 20 formed in the leg shaft 2. Is configured to have a small diameter.

As a result, in this embodiment, when the grounding body 3 is twisted and operated in the direction in which the lifting body 1 is lowered from the maximum rising position of the lifting body 1, the supporting object M is moved. From the end of the male screw portion 20 facing the engaging portion 11a of the lock body 11 of the lifting body 1 receiving the load to the lower end side of the leg shaft 2 of the screwless portion 21, the male portion is again returned to the male portion. It is possible to start engaging with the screw portion 20, and thereby the grounding body 3 in such a direction
The elevating body 1 can be smoothly moved downward again by the twisting operation.

Further, in this embodiment, the lock body 11 engages the engagement portion 11a and the leg shaft 2 with each other by the rotating shaft 11b provided above the engagement portion 11a. The lever body 12 is assembled in the case body 10 in a state in which the lever body 12 can be rotated in the unlocking direction, and the lever body 12 is provided on the engagement portion 11 of the lock body 11.
Contact part 1 for back surface 11c opposite to the side where a is provided
2a, the contact portion 12a is rotatably assembled to the case body 10 so as to be movable upward, and the rear surface 11c of the lock body 11 above the rotation shaft 11b. Is formed with a raised portion 11d protruding in a direction to move away from the leg shaft 2, and the contact portion 12a of the lever body 12 is pressed against the raised portion 11d at a pivotal position of the lever body 12. The lock body 11 is rotated so that the engagement between the engagement portion 11a and the leg shaft 2 is released.

Thus, according to the lifting / lowering leg according to this embodiment, (1) First, the abutment portion 12a of the lever body 12 causes the back surface 11c side of the lock body 11 to engage the engagement portion of the lock body 11. 11a can be pressed so as to always engage with the male screw portion 20 of the leg shaft 2, and the lifting / lowering body 1 is stably positioned at each position in the longitudinal direction of the leg shaft 2 to support the object M to be supported. Can be supported by the lifting / lowering body 1, and the fine adjustment can be performed.

(2) By rotating the lever body 12 so as to move the contact portion 12a upward, the contact portion 12a presses the raised portion 11d of the lock body 11. , By this, the lock body 11
Can be rotated so as to disengage the engagement between the engaging portion 11a and the male screw portion 20 of the leg shaft 2, and by this rotation, the lifting / lowering body 1 is moved to an arbitrary position in the longitudinal direction of the leg shaft 2. Can be moved significantly. (Significant adjustment function)

(3) Further, after the elevating body 1 is largely moved in this way, the lever body 12 is again moved to the abutting portion 12.
By rotating a so as to move downward, the back surface 11c of the lock body 11 below the rotation shaft 11b is pressed again by the abutting portion 12a so that the engaging portion 11a of the lock body 11 is moved. It can be re-engaged with the male screw portion 20 of the leg shaft 2, and the elevating body 1 can be stably positioned again at the position where the elevating body 1 is largely moved in this way to raise and lower the supporting object M. It can be supported by the body 1.

Further, in this embodiment, both or one of the contact portion 12a of the lever body 12 and the raised portion 11d of the lock body 11 is supported by the lifting body 1 by the supporting object M. In the state where the load is applied, the contact portion 12a and the raised portion 11d are configured to be elastically deformed by being pressed.

That is, since the lock body 11 is provided with the engaging portion 11a on the male screw portion 20 of the leg shaft 2 below the rotating shaft 11b, the lifting body 1 is supported by the supporting object M. In the state of receiving the load of, the upward force (F1) is relatively applied to the leg shaft 2, and the upward force (F1) causes the lock body 1 to move.
In this state, a turning force (F2) is applied to 1 in a direction in which the engaging portion 11a is bitten by the male screw portion 20. Then, in this embodiment, both or either of the contact portion 12a of the lever body 12 and the raised portion 11d of the lock body 11 are applied to the lock body 11 in such a manner that the rotational force (F2) is applied. When the lever body 12 is rotated to move the contact portion 12a upward while the lever body 12 is being operated, the contact portion 1
It is configured to be elastically deformed by the contact between the 2a and the raised portion 11d.

As a result, in this embodiment, when the large adjustment is attempted, the lever body 12 is merely rotated to move the abutting portion 12a upward, and the lock is achieved. The engaging portion 11a of the body 11 and the leg shaft 2
The lever body 12 is not disengaged from the male screw part 20 of the
The situation in which the elevating body 1 drops rapidly at the same time as the operation of does not occur. That is, when performing the large adjustment, the lock body 11 is rotated by the rotation force (F
In order to prevent 2) from being acted, it is possible to make it necessary to rotate the lever body 12 while the operator supports the lower portion of the support target M with a hand or the like. When the turning force (F2) is not applied, the contact portion 12a and the raised portion 11d are pressed against each other by the upward movement of the contact portion 12a, so that both of the contact portion 12a and the raised portion 11d or There is no elastic deformation in either one, and the lock body is oriented in such a direction that the engagement portion 11a is disengaged from the male screw portion 20 of the leg shaft 2 by the contact portion 12a that is moved upward in this manner. It is possible to rotate 11 so that the large adjustment can be performed without any trouble.

The contact portion 12a of the lever body 12 when the turning force (F2) is applied to the lock body 11
Is moved upward, the contact portion 12a and the raised portion 1
It is necessary to prevent the lock body 11 from being rotated in a direction in which it disengages from the male screw portion 20 of the leg shaft 2 by being pressed against 1d when this turning force (F2) is applied. This can be ensured by being configured so that the contact portion 12a is pressed against the raised portion 11d to cause elastic deformation in a direction of moving away from the leg shaft 2.

Further, when such a turning force (F2) is applied, the abutting portion 12a is pressed against the raised portion 11d, so that the raised portion 11d is elastically deformed so as to approach the leg shaft 2. Can be ensured by configuring so as to generate.

When the turning force (F2) is applied, the contact portion 12a is pressed against the raised portion 11d, so that the contact portion 12a moves away from the leg shaft 2. This can be ensured by the elastic deformation of the above-mentioned structure and the elastic deformation of the raised portion 11d in the direction of approaching the leg shaft 2.

More specifically, FIG. 1 to FIG.
In the example shown in (1), the case body 10 that constitutes the elevating body 1 includes a lower case 101 having an open upper surface and an upper case 108 that closes the open upper surface of the lower case 101.

In the lower case 101 and the upper case 108, the engaging portions 110 formed on the ends of the elastic pieces 109 formed on both sides of the upper case 108 are respectively the engaged portions formed on the outer surfaces on both sides of the lower case 101. After the elastic piece 109 is elastically outwardly expanded due to the engaging portion 110 being abutted against the upper portion 102, the engaging portion 110 is repulsed at a position beyond the engaged portion 102. , The engaged portion 102
It can be assembled with one touch by engaging with.

Further, the case body 10 having the above structure
In the upper case 108 and the lower surface of the lower case 101 in FIG.
03 and 111 are formed, and both through holes 10 are formed.
The leg shaft 2 is inserted through the case body 10 through 3, 111. In this example, the grounding body 3 is attached to the lower end of the leg shaft 2 thus inserted, and the through hole 111 provided in the upper case 108 is provided at the upper end of the leg shaft 2. A washer 134 that serves as the stopper body 4 is fitted to prevent the leg shaft 2 from entering from below.

Further, the lock body 11 is rotatably incorporated in the lower case 101 and the upper case 108 assembled in this way, and the main body of the lever body 12 is incorporated.

In this example, the lock body 11
Is configured to have a lever shape with protrusions 117 protruding in different directions at upper and lower ends.

Further, the engaging portion 11a for the male screw portion 20 of the leg shaft 2 is formed at the lower end side protruding portion 117 of the lock body 11, and the upper end side protruding portion 117 of the lock body 11 is formed as described above. It is configured to function as the raised portion 11d.

In this example, the protrusion 117 on the lower end side of the lock body 11 is formed with a recess 118 for accommodating the leg shaft 2 from the side of the leg shaft 2 in the case body 10. A female screw portion 119 that engages with the male screw portion 20 of the leg shaft 2 is formed in the recess 118. That is, in this embodiment, the female screw portion 119 of the recess 118 functions as the engaging portion 11a.

As described above, the leg shaft 2 has no screw at the portion of the leg shaft 2 which is located on the side of the engaging portion 11a of the lock body 11 at the maximum raised position of the elevating body 1. Since the portion 21 is formed, in this example, the lifting / lowering body 1 is located at the maximum raised position.
Even if the twisting operation of the grounding body 3 is continued so as to rotate the leg shaft 2 in the direction of moving the
No force is exerted on the lifting body 1 in the direction of moving it further upward, and even if the twisting operation is continued at the maximum rising position, the upper case 1
The washer 134 is not pushed up by the edge of the through hole 111 of 08, and the female screw portion 119 of the engaging portion 11a of the lock body 11 is not damaged.

From the maximum raised position of the lifting body 1,
When the grounding body 3 is twisted and operated in the direction in which the elevating body 1 is lowered, the concave portion 118 is sequentially arranged from the lower side of the concave portion 118 in the engaging portion 11a of the lock body 11.
It is possible to start engaging the female screw part 119 formed on the male screw part 20 below the screwless part 21, and thereby the twisting operation of the grounding body 3 in such a direction causes the elevating body 1 again. Can be smoothly moved downward.

Further, in this example, the recess 118 is formed.
The lock body 11 is located above the case body 10 and above the raised portion 11d.
A rotation shaft 11b that is rotatably assembled is provided therein.

In this example, the rotating shaft 11b has the lower case 101 in the lock body 11.
Is formed as a columnar protrusion 120 protruding from both end portions facing the engagement side with the upper case 108.

In this example, a pair of support plates 112, 112 are formed inside the upper case 108 with an interval for accommodating the lock body 11 therebetween, and the lower case 101 is also provided. Similarly, a pair of support plates 104, 104, which are similarly arranged with an interval to accommodate the lock body 11 therebetween, are formed, and further, a pair of support plates 112 formed on the upper case 108,
Shaft recesses 113 for accommodating the rotating shafts 11b are formed at the lower ends of the support shafts 112, respectively.
The rotary shafts 1 are respectively formed in the shaft recesses 113 formed in the shaft 12.
The pair of support plates 112, 112 of the upper case 108 and the pair of support plates 1 of the lower case 101 whose ends are abutted by assembling the cases 101 and 108 with the housing 1b accommodated therein are assembled.
04 and 104, the rotating shaft 11b is provided in the case body 10 in a direction substantially orthogonal to the axial direction of the leg shaft 2.
The lock body 11 is assembled in a state where lines are arranged.

Also, in this example, the lever body 1
2 is (1) the leg shaft 2 in the case body 10.
And a rectangular frame portion 123 for accommodating the lock body 11 incorporated in the case body 10 as described above, (2)
The concave portion 1 of the lock body 11 in the rectangular frame portion 123
The side opposite to the side on which 18 is formed, that is, the raised portion 1
One end is integrally connected to a frame edge portion on the back surface 11c side of the lock body 11 on which 1d is formed, and the other end is projected to the outside of the case body 10 through the side opening 105 of the case body 10. The operation piece portion 124 is provided, and (3) the operation knob 125 attached to the protruding end of the operation piece portion 124.

Further, in this example, the rectangular frame portion 1
A rotation shaft 126 for rotatably assembling the lever body 12 in the case body 10 is provided on the side of the case body 23 opposite to the side where the operation piece portion 124 is provided with the leg shaft 2 interposed therebetween. .

In this example, the rotating shaft 126 has the lower case 10 in the rectangular frame 123.
1 is formed as a columnar protrusion 127 protruding from both end portions facing the engaging side of the upper case 108.

In this example, the shaft recesses 11 for accommodating the rotating shafts 126 are respectively provided in the lower portions of both side plates of the upper case 108 which are engaged with the lower case 101.
4 are formed, and the case body 10 is assembled in a state in which the rotating shaft 126 is housed in the shaft recess 114, and the ends of the case body 10 are abutted by the combination, and the side plate of the upper case 108 and the lower case. With the side plate 101, the lever body 12 is incorporated in the case body 10 in a state in which the pivot axis is arranged in a direction substantially orthogonal to the axial direction of the leg shaft 2.

Further, in this example, the rectangular frame portion 1
An elastic piece 128, which extends upward with its lower end integrally connected to the lower end of the inner surface of the rectangular frame 123, is provided at a portion of the lock body 11 facing the rear surface 11c side of the lock body 11. Then, in this example, the elastic piece 128
The surface of the lock body 11 facing the rear surface 11c serves as the contact portion 12a. More specifically, in this example, the back surface 11 of the lock body 11 is
On the c-side, a lower ridge 121 is formed below the rotary shaft 11b, and is oriented in a direction to release the engagement between the engagement portion 11a of the lock body 11 and the male screw portion 20 of the leg shaft 2. In a state where the lever body 12 is not rotated so that the lock body 11 is rotated, the elastic piece 12 is
8 of the contact portion 12a of the elastic piece 128 is pressed against the lower protruding portion 121 so that the protruding end of the elastic piece 128 is located below the protruding portion 11d. There is.

Further, in this example, the elastic piece 1
On the rear surface 11c side of 28, in the rectangular frame portion 123,
A split groove 129 is formed to allow the elastic piece 128 to move by elastic deformation in a direction away from the leg shaft 2.
In a state where the turning force (F2) is applied to the lock body 11, the operation knob 125 is gripped and the lever body 12 is moved around the rotation shaft 126.
Even if the abutting portion 12a of 28 is rotated upward so as to be pressed against the raised portion 11d, the protruding end side of the elastic piece 128 is separated from the leg shaft 2.
The elastic piece 128 is inserted into the split groove 129, and the elastic piece 128 is engaged with the male screw portion 20 of the leg shaft 2 and the engaging portion 11.
It is assumed that the lock body 11 is not rotated about the rotation shaft 11b in the direction to release the engagement with a. (Fig. 6)

On the other hand, when the turning force (F2) is not applied to the lock body 11, the operation knob 125 is gripped and the lever body 12 is elastically moved about the rotation shaft 126. Abutting portion 12a of the piece 128
When the elastic piece 128 is rotated upward so as to be pressed against the raised portion 11d, the rigidity of the elastic piece 128 is set so as not to cause elastic deformation. In this case, the protrusion of the elastic piece 128 is The lock body 11 is centered around the rotation shaft 11b in a direction in which the end side presses the raised portion 11d to release the engagement between the male screw portion 20 of the leg shaft 2 and the engagement portion 11a.
It is supposed to rotate. (Figure 7)

In this example, the case body 1
0 so that the lever body 12 is always positioned at a rotational position where the contact portion 12a of the lever body 12 is pressed against the back surface 11c of the lock body 11 below the raised portion 11d of the lock body 11. A biasing means 132 for biasing is provided.

Specifically, in this example, the biasing means 132 is provided in the lever body 12 at the connecting portion between the operation piece portion 124 and the rectangular frame portion 123. Holding hole 1 opened on the upper surface of
The holding projection 131 formed on the bottom of the hole 30 was inserted into the spring inside from one end side of the spring, and the holding projection 115 formed on the inner surface of the upper case 108 was inserted inside the spring from the other end side of the spring. In this state, the lever body 12
The compression coil spring 133 is interposed between the upper case 108 and the upper case 108.

As a result, in this example, the contact portion 12a of the lever body 12 (in this example, the elastic piece 1)
28, the surface facing the back surface 11c of the lock body 11)
Can always be pressed against the back surface 11c of the lock body 11, and the engaging portion 11a of the lock body 11 can be held by the contact portion 12a thus pressed.
However, in a situation in which the large adjustment for disengaging the male screw portion 20 of the leg shaft 2 from the engagement of the male screw portion 20 and the engaging portion 11a is not required, the male screw portion 20 should be always properly meshed. The lock body 11 can be positioned.

Further, for the large adjustment, the abutment portion 12a of the lever body 12 is raised by the raised portion 1 of the lock body 11.
When the turning operation is released after the turning operation is performed to the position pressed against 1d, the lever body 12 can be returned to the position before the turning operation by the bias of the biasing means 132. It is possible to press the back surface 11c of the lock body 11 by the abutting portion 12a so that the engaging portion 11a is properly engaged with the male screw portion 20 of the leg shaft 2 again at the position after the large adjustment. it can.

Further, in this example, the lock body 1
The ridge 11d formed in 1 has an inclined surface 122 that is inclined so as to gradually separate from the leg shaft 2 as it goes from the rotation shaft 11b side of the lock body 11 to the upper end side of the lock body 11. Is configured.

As a result, in this example, as the lever body 12 is rotated to move the abutting portion 12a upward for the large adjustment, the abutting portion 12a is rotated. (In this example, of the contact portions 12a, the contact portion 12 on the protruding end side of the elastic piece 128 is used.
The lock body 1 is obtained by abutting a) on the inclined surface 122.
1 gradually increases the engaging portion 11a and the male screw portion 2 of the leg shaft 2.
It can be rotated in a direction to release the engagement with 0, and the engagement can be released smoothly.

In this example, the upper case 108 has a cylindrical portion 116 formed on the upper surface thereof, the lower end of which is communicated with the through hole 111 and the upper and lower ends of which are open. The leg shaft 2 protruding from the hole 111 is made to pass through the inside of the tubular portion 116.

Further, in this example, the protruding end surface is located on the side of the lower case 101 opposite to the protruding side of the operation piece portion 124 of the lever body 12 at a position substantially flush with the upper surface of the upper case 108. A columnar portion 106 is formed so as to position it, and a hole 107 for fixing a screw opened at the protruding end face is formed in the columnar portion 106. The elevating body 1 is finally fixed to the support target M by screwing the shaft portion of the screw into the fixing hole 107 from the formed screw insertion hole (not shown). is there.

[0069]

According to the lifting / lowering leg according to the present invention, the leg shaft for supporting the lifting / lowering body so as to be able to move up and down is rotated in a direction for moving the lifting / lowering body upward from the state in which the lifting / lowering body is at the maximum lifted position. However, even if the rotation is performed, a force in a direction of moving upward does not act on the lifting body due to this rotation.

[Brief description of drawings]

FIG. 1 is a side view of the lifting leg (maximum lifting position of the lifting body 1).

FIG. 2 is a side view of the lifting leg as viewed from the left side in FIG.

FIG. 3 is a plan view of the lifting leg.

FIG. 4 is a sectional view of the same main part.

FIG. 5 is a sectional view of the main part of the same.

FIG. 6 is a sectional view of the same main part.

FIG. 7 is a sectional view of the main part of the same.

FIG. 8 is a sectional view of the main part (maximum lifted position of the lifting body 1).

FIG. 9 is a perspective view of the same.

FIG. 10 is a plan view of the upper case 108.

FIG. 11 is a bottom view of the same.

FIG. 12 is a side view of the same.

13 is a cross-sectional view taken along the line AA in FIG.

14 is a side view of the upper case 108 seen from the left side in FIG.

15 is a sectional view taken along line BB in FIG.

FIG. 16 is a plan view of a lower case 101.

FIG. 17 is a bottom view of the same.

FIG. 18 is a side view of the same.

FIG. 19 is a sectional view taken along the line CC in FIG.

20 is a sectional view taken along line DD in FIG.

FIG. 21 is a lower case 10 seen from the left side in FIG.
Side view of 1

22 is a sectional view taken along line EE in FIG.

FIG. 23 is a plan view of the lever body 12.

FIG. 24 is a bottom view of the same.

FIG. 25 is a side view of the same.

26 is a sectional view taken along line FF in FIG.

27 is a side view of the lever body 12 viewed from the left side in FIG. 25.

FIG. 28 is a side view of the lock body 11.

FIG. 29 is a plan view of the lock body 11.

30 is a side view of the lock body 11 viewed from the right side in FIG. 28.

FIG. 31 is a side view of the leg shaft 2.

[Explanation of symbols]

1 Lifting body 11 Rock body 11a engagement part 12 lever body 2 legs 20 Male screw part 21 Screwless part 3 grounding body 4 stopper body M support target

Claims (2)

[Claims] 1. An elevating body that is attached to a supporting object and supports the supporting object from below, a bolt-shaped leg shaft that is inserted into the elevating body and supports the elevating body so that the elevating body can move up and down, and the leg. The grounding body is attached to the lower end of the shaft and rotates the leg shaft by a twisting operation, and the stopper body is attached to the upper end of the leg shaft to prevent the leg shaft from coming out of the elevating body. The lifting body includes a lock body having a male thread portion of the leg shaft and a locking portion that engages from the lateral side of the leg shaft, and an engaging portion of the lock body and the leg shaft by an operation from the outside of the lifting body. And a lever body linked to the lock body so as to move the lock body in a direction to release the engagement, and the lifting body is abutted against the stopper body in the leg shaft from below. The portion to be positioned to the side of the engaging portion of the lock member at the maximum raised position of the lift, the lift Ashigu, characterized in that no threaded portion is formed. 2. The lifting leg according to claim 1, wherein the small diameter portion of the leg shaft is an unthreaded portion.