JP2016142319A - Column lock device and item supporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a column lock device of which holding and releasing can be easily carried out and its holding state is not released when vibration occurs, and an item supporting device having this column lock device.SOLUTION: This column lock device 80 is made in such a way that an outer shape of a column 30 is made to have an elliptical shape, a rectangular hole 32 through which the column 30 passes is made to have a rectangular form corresponding to an elliptical size of the column 30, and resin pipes 36 are arranged at four corners of the rectangular hole 32, and thus a user can easily perform a locking and a releasing of the column 30 only by twisting the column 30. In addition, the column lock device 80 of this invention shows that the resin pipes 36 are deformed under a locked state and the column 30 is pressed and held by a resilient force of the resin pipes 36. Thus, even if a continuous vibration or the like is applied to the column lock device 80, the resin pipes 36 absorb vibration and so no looseness occurs at the held state.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a column lock device that holds a column so that the column can be moved up and down along its axial direction, and an article support device including the column lock device.

  There are many cases where it is desired to change the direction of lighting equipment, speakers, and other electrical devices. However, when these electric devices are installed at high places, it is not easy to change their orientation. With regard to this problem, the inventors of the present application provide a frame for installing the electric device at the upper end of the column, and adjust the pitch angle adjusting rod for adjusting the pitch angle of the electric device inside the column and the yaw angle of the electric device. The invention related to the support device described in [Patent Document 1], which allows the pitch angle adjusting rod and the yaw angle adjusting rod to be operated on the lower end side of the support column through the yaw angle adjusting rod, was performed.

  Further, this [Patent Document 1] includes a guide cylinder that holds the column so that it can be moved up and down along its axial direction, and a lock device that is provided on the guide cylinder and restricts the movement of the column in the axial direction. An invention related to the supporting device is disclosed. With this locking device, when the electric device is used, the column can be raised and locked and held at a predetermined position, and the column can be lowered and accommodated when not in use.

Japanese Patent No. 5433613

  However, the locking device of the invention described in [Patent Document 1] may gradually loosen due to vibration or the like, and further improvement is desired.

  The present invention has been made in view of the above circumstances, and provides a column locking device that can easily hold and release the column and does not loosen the holding state even during vibration, and an article support device including the column locking device. With the goal.

The present invention
(1) A support column 30 having a predetermined length and having an elliptical cross-sectional outer shape, a guide tube 34 having a rectangular hole 32 having a rectangular cross section into which the support column 30 is inserted in a movable state, Resin pipes 36 arranged at the four corners,
When the support column 30 rotates and the peripheral surface of the support column 30 comes into contact with the long side of the square hole 32, the major axis direction of the support column 30 is in a substantially diagonal direction of the square hole 32, and the approximately diagonal direction The above-mentioned problem is solved by providing a column lock device 80 in which the resin pipe 36 positioned at the position presses the column 30 to lock the vertical movement of the column 30.
(2) The above (1), wherein the circumferential surface of the support column 30 is in contact with the long side of the square hole 32 at a position where the major axis direction of the support column 30 is slightly past the diagonal direction of the square hole 32. The above-mentioned problem is solved by providing the described column locking device 80.
(3) The flatness of the cross-sectional outer shape of the support column 30 is 0.07 ± 0.01,
The long side dimension of the square hole 32 is 0.5 to 1.5% larger than the long diameter dimension of the support column 30;
When the difference between the major axis dimension and the minor axis dimension of the column 30 is ΔL,
The strut locking device according to (1) or (2) above, wherein the short side dimension of the square hole 32 is smaller than the major axis dimension of the column 30 and larger than the minor axis dimension by (ΔL / 2) or more. The above problem is solved by providing 80.
(4) The fulcrum 30 is coupled to the frame 2 by a column 30 having a predetermined length, a frame 2 provided at the upper end of the column 30, and a fulcrum shaft 3 orthogonal to the axis of the column 30. An article holding frame 4 supported so as to be swingable in the vertical direction around the shaft 3,
The support column 30 includes a pitch angle adjusting rod 12 that is rotatably provided in the support column 30.
Between the upper end portion of the pitch angle adjusting rod 12 and the article holding frame 4, forward and reverse rotational movement within a predetermined rotation angle range of the pitch angle adjusting rod 12 is centered on the fulcrum shaft 3. A transmission mechanism 8 for converting the swinging motion of the article holding frame 4 is interposed,
The lower end portion of the pitch angle adjusting rod 12 serves as a pitching operation portion (handle 12a) for rotating the pitch angle adjusting rod 12 forward and backward to swing the article holding frame 4 about the fulcrum shaft 3. Protrudes from the lower end of the support column 30,
Further, the support column 30 includes a yaw angle adjustment rod 13 that can be independently rotated in the support column 30 separately from the pitch angle adjustment rod 12. The underframe 2 is fixed, and the lower end of the yaw angle adjusting rod 13 is the lower end of the support column 30 as a yawing operation part (handle 13a) for rotating the underframe 2 around the yaw angle adjusting rod 13. In the article support apparatus 100 that protrudes further,
The cross-sectional outer shape of the column 30 is elliptical, and the column lock device 80 according to any one of the above (1) to (3) is provided to hold the column 30 up and down along its axial direction. By providing the article support apparatus 100 characterized by the above, the above-described problems are solved.

  The column lock device and the article support device according to the present invention have an elliptical outer shape of the column, a rectangular hole through which the column is inserted has a rectangular shape corresponding to the elliptical dimension of the column, and resin pipes are provided at the four corners of the square hole. By disposing, the column can be easily locked and released. Further, since the resin pipe is deformed in the locked state and the support is pressed and held by the elastic force of the resin pipe at this time, the support of the support is not loosened.

It is a perspective view of the support | pillar lock apparatus which concerns on this invention. It is a figure which shows the locked state of the support | pillar lock apparatus which concerns on this invention. It is a figure which shows the cancellation | release state of the support | pillar lock apparatus which concerns on this invention. It is a figure which shows the article | item support apparatus which concerns on this invention. It is a perspective view which shows the support | pillar lock apparatus of the article | item support apparatus which concerns on this invention. It is a figure explaining the transmission mechanism of the article | item support apparatus which concerns on this invention.

  DESCRIPTION OF EMBODIMENTS Embodiments of a column lock device 80 according to the present invention and an article support device 100 including the same will be described with reference to the drawings. Here, FIG. 1 is a perspective view of a column locking device 80 according to the present invention. 2 is a top view showing a locked state of the column locking device 80 according to the present invention, and FIG. 3 is a top view showing a released state.

  As shown in FIGS. 1 to 3, the strut locking device 80 according to the present invention has a strut 30 having a predetermined length and an elliptical cross section, and a cross section in which the strut 30 is fitted in a movable state. A guide cylinder 34 having a rectangular hole 32 and a resin pipe 36 disposed at the four corners of the square hole 32 of the guide cylinder 34 are provided.

  The guide tube 34 constituting the column locking device 80 is preferably composed of an inner layer 34a and a surface layer 34b. The inner layer 34a in which the square holes 32 are formed is made of a synthetic resin that can be easily molded and processed, and the surface layer 34b It is preferable to use a metal such as aluminum having a certain strength. In particular, as the synthetic resin used for the inner layer 34a, it is preferable to use Duracon (registered trademark), which is a copolymer of polyacetal. The guide tube 34 is fixed to a special vehicle such as a fire-fighting vehicle or a construction vehicle, equipment, equipment, a building, or the like via the mounting member 40, for example.

  Further, as described above, the support column 30 has an elliptical cross-sectional shape. In addition, when using the support | pillar 30 for the article | item support apparatus 100 mentioned later, the support | pillar 30 is made into the pipe shape which has the through-hole 30a, and the pitch angle adjustment rod 12 and the yaw angle adjustment rod 13 are shown in this through-hole 30a as shown in FIG. And insert. In this case, the through hole 30a is preferably circular. Further, the flatness of the ellipse of the outer shape of the support column 30 is preferably not about so large but about 0.07 ± 0.01. Here, when the flatness is 0.07 ± 0.01 and the major axis dimension L1 of the support column 30 is 43.5 mm, the minor axis dimension L2 is 40.02 mm to 40.89 mm.

  The long side dimension L3 and the short side dimension L4 of the square hole 32 are also set to appropriate values according to the long diameter dimension L1 and the short diameter dimension L2 of the support column 30. In particular, the long side dimension L3 of the square hole 32 is preferably slightly larger than the major axis dimension L1, specifically, about 0.5 to 1.5%. Here, if the major axis dimension L1 of the column 30 is 43.5 mm, the major dimension L3 of the square hole 32 is 43.71 mm to 44.15 mm. The short side dimension L4 of the square hole 32 is set to a value smaller than the major axis dimension L1 of the column 30 and larger than the minor axis dimension L2. In particular, when the difference between the major axis dimension L1 and the minor axis dimension L2 of the column 30 is ΔL, the minor side dimension L4 is smaller than the major axis dimension L1 and larger than the minor axis dimension L2 by (ΔL / 2) or more. It is preferable. Here, when the major axis dimension L1 of the support column 30 is 43.5 mm and the minor axis dimension L2 is 40.5 mm, (ΔL / 2) = 1.5 mm, and the minor dimension L4 is 43.5 mm> L4 ≧ 42 mm. It becomes. Note that the most preferable dimension ratio of the support column 30 and the square hole 32 satisfying the above conditions is as follows. The flatness of the support column 30 is 0.07, the long side dimension L3 of the square hole 32 is L1 × 1.009, and the short side dimension L4. = L2 + (ΔL × 0.73). In this case, if the major axis dimension L1 of the support column 30 is 43.5 mm, the minor axis dimension L2 is 40.5 mm, the long side dimension L3 of the square hole 32 is 43.9 mm, The short side dimension L4 is 42.7 mm.

  The resin pipe 36 is a known synthetic resin pipe that has a certain degree of hardness and elastically deforms when pressed by the rotation of the column 30. The diameter of the resin pipe 36 is set such that the distance from the circumferential surface of the resin pipe 36 located diagonally to the circumferential surface is slightly smaller than the long diameter dimension L1 of the support column 30. With such a diameter, when the major axis direction of the support column 30 is substantially the diagonal direction of the square hole 32, the support column 30 presses and deforms the resin pipe 36 positioned diagonally, and at the same time, the deformed resin The pipe 36 presses and holds the support column 30. When the long diameter L1 of the support column 30 is 43.5 mm, the long side dimension L3 of the square hole 32 is 43.9 mm, and the short side dimension L4 is 42.7 mm, the diameter of the resin pipe 36 may be φ7.6 mm. preferable.

  Next, the operation of the column locking device 80 according to the present invention will be described. First, when the strut locking device 80 is in the locked state, the strut 30 has a long diameter direction (L1) of the strut 30 in a specific substantially diagonal direction of the square hole 32 as shown in FIG. 2 (a) or 2 (b). At the same time, the specific peripheral surface of the support column 30 comes into contact with the long side of the square hole 32. In this locked state, the resin pipe 36 located diagonally is elastically deformed to press and hold the support column 30 and prevent the support column 30 from moving up and down.

  Next, when releasing this locked state, a user such as a worker holds the support column 30 and twists it counterclockwise in FIG. 2 in this example. As a result, as shown in FIG. 3, the major axis direction (L1) of the support column 30 rotates to the short side direction side of the square hole 32, and the minor axis direction (L2) of the support column 30 moves to the long side direction side of the square hole 32. Rotate. As a result, the major axis direction and the minor axis direction of the support column 30 are substantially the same as the longer side direction and the shorter side direction of the square hole 32, and the support column 30 and the square hole 32 are not in contact with each other. As a result, the locked state is released.

  Next, the user moves the column 30 to the required height. Thereby, the support | pillar 30 slides in the square hole 32 of the guide cylinder 34, and moves to a predetermined height position. Next, the user twists the column 30. In this example, an example of twisting in the clockwise direction in FIG. 3 is shown, but the rotation direction of the support column 30 may be either clockwise or counterclockwise. However, when it is rotated clockwise to enter the locked state, the unlocking direction of the locked state is counterclockwise. On the other hand, when it is rotated counterclockwise to enter the locked state, the unlocking direction of the locked state is clockwise.

  By the rotation of the column 30, the long-diameter circumferential surface of the column 30 comes into contact with the resin pipe 36, and the resin pipe 36 is pressed and deformed. Thereby, the rotation resistance of the support | pillar 30 increases. When the support column 30 is further rotated and the major axis direction of the support column 30 is positioned in a specific substantially diagonal direction of the square hole 32, the peripheral surface of the support column 30 comes into contact with the long side of the square hole 32 to become a locked position and the rotation stops. At this time, the resin pipe 36 positioned in the diagonal direction is deformed by the pressing of the support column 30 and presses the support column 30 by the elastic force generated by the deformation. The support 30 is securely held by the pressure of the resin pipe 36, and even when continuous vibration or the like is applied to the support lock device 80, the resin pipe 36 absorbs vibration as an elastic body and loosens in a holding state. Will not occur.

  As shown in FIG. 2B, the column 30 is locked when the major axis direction of the column 30 slightly exceeds the diagonal direction of the square hole 32 (about several degrees to 10 degrees as an angle). It is particularly preferable that 30 and the square hole 32 abut. According to this configuration, the rotational resistance of the support column 30 takes a peak in the diagonal direction of the square hole 32, and then the support column 30 is rotated and held almost automatically by the elastic force of the resin pipe 36. Therefore, in this configuration, the support column 30 can be reliably positioned at the locked position, and the user can feel that the support column 30 is reliably locked by increasing or decreasing the rotation resistance of the support column 30. Further, if a click sound is generated by a collision when the support column 30 and the square hole 32 come into contact with each other, the user can confirm that the locked state is audible. Furthermore, in this configuration, in order to release the locked state, it is necessary to rotate the support column 30 with a force greater than the maximum rotational resistance generated at the apex of the resin pipe 36. Looseness can be almost certainly prevented.

  Next, the article support apparatus 100 provided with the support | pillar lock apparatus 80 which concerns on this invention is demonstrated. The article support device 100 according to the present invention shown in FIG. 4 has a column 30 having a predetermined length constituting the column lock device 80, and a metal plate is bent at the upper end of the column 30. A concave frame 2 is installed. An article holding frame 4 that is swingable in the vertical direction about a fulcrum shaft 3 orthogonal to the axis of the support column 30 is provided inside the underframe 2, and the electric equipment 5 is attached to the article holding frame 4. Is fixed. In addition, although the example which provided the lighting fixture (light projector) in the electric equipment 5 is shown here, what kind of electric equipments, such as a sound collection microphone, a video camera, and an image display apparatus, are installed as the electric equipment 5 besides the lighting fixture. Also good. Further, as described above, the support column 30 is a pipe having an elliptical cross-sectional outer shape and having a through-hole 30a inside. As shown in FIG. 5, the pitch angle adjusting rod 12 and the yaw angle adjusting rod 13 are individually provided inside. It is inserted so that it can rotate. The support column 30 is inserted into the square hole 32 of the guide tube 34 constituting the support column locking device 80 in a movable state. An attachment member 40 for attaching the article support device 100 is fixed to the guide tube 34.

  The pitch angle adjusting rod 12 is a metal hollow shaft (round pipe) disposed concentrically with the through hole 30 a of the support column 30, and its upper and lower ends project outward from the support column 30. The upper end portion of the pitch angle adjusting rod 12 passes through the frame 2 and is connected to the bottom portion of the article holding frame 4 via the transmission mechanism 8. The rotational motion is converted into a vertical swing motion of the article holding frame 4 about the fulcrum shaft 3. Further, a cylindrical handle 12 a having a knurled outer periphery is fixed to the lower end portion of the pitch angle adjusting rod 12. The handle 12 a constitutes a pitching operation unit for swinging the article holding frame 4 about the fulcrum shaft 3. Note that a cable (not shown) having one end connected to the electric device 5 is passed through the pitch angle adjusting rod 12, and power supply to the electric device 5 and communication of various signals are performed through the cable.

  Further, the yaw angle adjusting rod 13 is also a metal hollow shaft (round pipe) arranged concentrically with the through hole 30a of the support column 30, and the inner diameter thereof is larger than the outer diameter of the pitch angle adjusting rod 12, and inside thereof A pitch angle adjusting rod 12 is inserted. Also, the upper and lower ends of the yaw angle adjusting rod 13 protrude outward from the support column 30, and the frame 2 is fixed to the upper end of the yaw angle adjusting rod 13. Further, a ring-shaped handle 13 a having a knurled outer periphery is fixed to the lower end portion of the yaw angle adjusting rod 13. And this handle 13a comprises the yawing operation part for rotating the frame 2 centering on the yaw angle adjustment rod 13. FIG.

  Here, the structure of the suitable transmission mechanism 8 of the article | item support apparatus 100 is demonstrated using FIG. As shown in FIGS. 6A and 6B, the transmission mechanism 8 includes a turning arm 81 and a link 83 having universal joints 82 and 82 at both ends. The swing arm 81 is perpendicular to the pitch angle adjusting rod 12 and one end is fixed to the upper end of the pitch angle adjusting rod 12, and the other end of the swing arm 81 is connected to one end of the link 83 via the universal joint 82. Yes. The universal joint 82 is a ball joint having a ball receiver 82 a and a ball portion 82 b that is rotatably held by the ball receiver 82 a, and the ball joint (universal joint 82) is fixed to both ends of the link 83. Has been. The ball portion 82b held by one ball receiver 82a is attached to the tip of the swing arm 81 via the shaft portion 82c, and the ball portion 82b held by the other ball receiver 82a is attached to the article via the shaft portion 82c. It is attached to the bottom of the holding frame 4.

  When the pitch angle adjusting rod 12 is rotated in the forward and reverse directions within a predetermined rotation angle range, the transmission mechanism 8 configured as described above is turned into a swinging motion around the fulcrum shaft 3 with respect to the article holding frame 4. Convert and communicate. Therefore, due to the change in the pitch angle (elevation angle and depression angle) of the article holding frame 4, the direction of the electric device 5 fixed to the article holding frame 4 is upward as shown in FIG. 6C (in this example, the maximum elevation angle θ is 40 degrees) or downward (in this example, the maximum depression angle ω is about 55 degrees) as shown in FIG. 6 (d). Further, the underframe 2 can be rotated around the vertical axis (yaw angle adjusting rod 13), and the direction of the electric device 5 can be changed in the front-rear and left-right directions by changing the yaw angle (azimuth angle). it can.

  As shown in FIG. 6 (a), the fulcrum shaft 3 is provided at both ends of the frame 2 and supports the article holding frame 4 so as to be swingable in the vertical direction. Preferably, the holding frame 4 and the electric device 5 are provided at a position passing through the center of gravity of the combined body. In this configuration, the rotational moment does not act from the article holding frame 4 side to the pitch angle adjusting rod 12 side regardless of the posture of the electric equipment 5 shown in FIGS. 6C and 6D. 5 does not swing due to its own weight, and the electric device 5 can be maintained at the set pitch angle even if the hand is released from the handle 12a.

  The article support device 100 in which the electric device 5 as the projector is installed is fixed to the body of a rescue vehicle such as a fire truck via an attachment member 40, and guides the support column 30 during nighttime rescue activities. As shown above, the column 30 is raised to a predetermined position, and the support column 30 is twisted to be in a locked state as described above, and the handle 12a, 13a is rotated to irradiate the target place with light.

  As described above, in the column lock device 80 according to the present invention, the outer shape of the column 30 is elliptical, the square hole 32 through which the column 30 is inserted has a rectangular shape corresponding to the elliptical dimension of the column 30, and the square hole By disposing the resin pipes 36 at the four corners 32, the user can simply lock and release the column 30 only by twisting the column 30. Further, in the column lock device 80 according to the present invention, the resin pipe 36 is deformed in the locked state, and the column 30 is pressed and held by the elastic force of the resin pipe 36 at this time. Therefore, even when continuous vibration or the like is applied to the column locking device 80, the resin pipe 36 absorbs the vibration and the holding state does not become loose.

  Furthermore, in the configuration in which the lock position of the support column 30 is set so that the major axis direction of the support column 30 is slightly beyond the diagonal direction of the square hole 32, the support force 30 is locked because the elastic force of the resin pipe 36 rotates the support column 30 to the lock position. It can be reliably located at the position. Further, the user can confirm that the support column 30 is surely locked by increasing or decreasing the rotation resistance of the support column 30. Further, in this configuration, since the locked state is not released unless the support column 30 is rotated with a force greater than the maximum rotational resistance generated at the top of the resin pipe 36, the support column 30 is almost surely loosened due to vibration or accidental phenomenon. Can be prevented.

  It should be noted that the configuration, shape, operation mechanism, dimensions, and the like of each part of the column lock device 80 and the article support device 100 shown in this example are examples, and the present invention is modified and implemented without departing from the scope of the present invention. It is possible.

2 underframe
3 fulcrum shaft
4 Goods holding frame
8 Transmission mechanism
12 Pitch angle adjustment rod
13 Yaw angle adjustment rod
30 props
32 square holes
34 Guide tube
36 resin pipe
80 Prop lock device
100 article support device

Claims (4)

A column having a predetermined length and an elliptical cross-sectional outer shape,
A guide tube having a rectangular hole with a rectangular cross-section into which the support column is movable;
Resin pipes arranged at the four corners of the square hole,
When the support column rotates and the peripheral surface of the support column contacts the long side of the square hole, the major axis direction of the support column is in a substantially diagonal direction of the square hole, and the resin positioned in the approximately diagonal direction A column lock device, wherein a pipe presses the column to lock the vertical movement of the column. The strut locking device according to claim 1, wherein the circumferential surface of the strut abuts the long side of the square hole at a position where the major axis direction of the strut slightly exceeds the diagonal direction of the square hole. The flatness of the cross-sectional outer shape of the column is 0.07 ± 0.01,
The long side dimension of the square hole is 0.5 to 1.5% larger than the long diameter dimension of the column,
When the difference between the major axis dimension and the minor axis dimension of the support column is ΔL,
The strut locking device according to claim 1 or 2, wherein a short side dimension of the square hole is smaller than a major diameter dimension of the strut and larger than the short diameter dimension by (ΔL / 2) or more. A column having a predetermined length, a frame provided at the upper end of the column, and a fulcrum shaft orthogonal to the axis of the column is coupled to the frame and swings up and down around the fulcrum axis. An article holding frame supported in a possible manner,
The support column has a pitch angle adjusting rod rotatably provided in the support column.
Between the upper end portion of the pitch angle adjusting rod and the article holding frame, the article holding frame that rotates forward and reverse within a predetermined rotation angle range of the pitch angle adjusting rod about the fulcrum axis. A transmission mechanism that converts the rocking motion of
The lower end portion of the pitch angle adjusting rod protrudes from the lower end of the column as a pitching operation portion for rotating the pitch angle adjusting rod forward and backward to swing the article holding frame around the fulcrum axis,
Further, the support column has a yaw angle adjustment rod that can be rotated independently from the pitch angle adjustment rod in the support column, and the underframe is fixed to an upper end portion of the yaw angle adjustment rod. The lower end portion of the yaw angle adjustment rod protrudes from the lower end of the column as a yawing operation portion for rotating the underframe around the yaw angle adjustment rod.
The cross-sectional external shape of the said support | pillar is an elliptical shape, The support | pillar lock apparatus in any one of the Claims 1 thru | or 3 which hold | maintained the said support | pillar so that raising / lowering was possible along the axial direction was provided. Article support device.

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