JPS6347357Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a tripod dolly for moving a tripod.

(Prior art) A conventional tripod dolly is provided with a caster with a rolling wheel locking mechanism at the tip of each of the three arms, and when moving the tripod supported on the three arms, the When it is necessary to release the wheel locking mechanism and fix the tripod, the wheel locking mechanism is activated to stop the rotation of the wheels of the caster and prevent the dolly from moving.

However, the casters with rolling-wheel locking mechanisms used in conventional tripod dollies are much more expensive than those without rolling-wheel locking mechanisms, and when trying to fold the three arms, the rolling-wheel locking mechanism There is a problem that the operation pedals of the mechanism interfere with each other.

On the other hand, as shown in Japanese Utility Model Application Publication No. 50-106856, a frame frame having a freely rotatable wheel and rotatably attached to the main body of the device by a rotating shaft,
a floor installation part formed parallel to the rotation axis of the top frame and having the same length as the distance from the rotation axis to the outer peripheral surface of the front end of the car, and a notch hole is provided in the floor installation part, A claw portion that engages with this notch hole is provided on the device body, and a concave claw portion that engages with the outer peripheral surface of the vehicle is formed on the device body, and the rotation of the top frame allows the floor installation portion to be moved. There is a caster in which a cutout hole or the outer peripheral surface of the wheel is selectively engaged with a claw or a concave claw of the device body.

This caster can be used for washing machines, dryers, etc.
A portion that pivotally supports the frame frame, a portion that locks the frame frame in a ring or leg state, etc. are cut and raised.

(Problems to be solved by the invention) The casters described in the above publication can move and fix washing machines, etc. without using casters with wheel locking mechanisms, but the casters described in the above publication can move and fix washing machines, etc. is difficult to use. The arm of a tripod dolly is made of a long cylindrical member such as a pipe.
It is difficult to cut and form the above-mentioned pivot portion, locking portion, etc. on this arm, and when the illustrated portion of the device body is attached to the dolly arm as a mounting plate, there are many screws on the arm. This is because holes must be formed and the castor must be securely fixed to the armrest using a large number of screws.

This invention does not require complicated processing on the arms.
To enable a stand with casters to be easily attached to a arm using a single screw.

[Structure of the idea]

(Means for Solving the Problems) The present invention provides that each of the three arms 3, 4, 5 in a long cylindrical shape is supported by tripod holders 6, 7 provided on each of the arms 3, 4, 5. , 5 provided at the tip of the caster 9
In the tripod dolly, which is moved by means of ，
The stand mounting member 41 is attached to the arm by inserting the screw 44 into the inside through the end openings of the stand mounting member 41 through the arms 3, 4, and 5 and screwing it into the tongue piece 42. The upper part of the stand 8 is rotatably attached to a pivot part 46 integrally formed on the stand attachment member 41, and a clamping part integrally provided on the stand 8 is attached to the lower part of the stand attachment member 41. A convex portion 56 that fits into the piece 57 when the stand is folded is integrally molded, and a stopper 58 that engages with the upper part of the stand 8 when the stand is in contact with the ground is integrally molded with the stand mounting member 41. A caster 9 is attached to the side facing the stand 8, and by rotating the stand 8, either the stand 8 or the caster 9 is grounded.

(Function) In the present invention, the stand mounting member 41 is fitted to the outer periphery of the tip of the long cylindrical arms 3, 4, 5, and one screw 4
By screwing 4 into the tongue piece 42 inside the arm through the arm from below, the stand 8 with casters can be firmly fixed to the arm. When the stand 8 is in use, the stand is kept in contact with the ground by the stopper 58, and while the caster 9 is in use, the convex portion 56 and the clamping piece 57 are fitted to keep the stand in the folded state.

(Example) Hereinafter, the present invention will be described in detail with reference to an example shown in the drawings.

As shown in FIG. 1, the base ends of three elongated cylindrical arms 3, 4, 5 are supported by a central member 2 integrally formed with a grip part 1 to be gripped when carrying. A pair of tripod holders 6, 7 are provided on the book arms 3, 4, 5, respectively.

As shown in FIG. 2, a stand 8 is rotatably supported at the tip of each arm 3, 4, 5, and
A caster 9 is attached to the back surface of each stand 8, and by rotating the stand 8, either one of the stand 8 or the caster 9 is grounded.

As shown in FIG. 3, the central member 2 consists of an upper member 2a and a lower member 2b that are fixed by screws 11, and the central arm 4 has its fixing hole 12.
is fitted and fixed between the fixing protrusions 13 of the members 2a and 2b, and the other two arms 3 and 5 have their rotation holes 14 inserted between the rotation protrusions 15 of the members 2a and 2b. It is provided so that it can be fitted in and rotated in the horizontal direction around this convex portion 15. The arms 3, 5 are locked by a mechanism that automatically locks when closed parallel to the middle arm 4 and when opened 120°.

That is, as shown in FIG. 4 and FIG. 5 as well as FIG. are fitted into the small holes 19 of the arms 3 and 5 for positioning, and the locking pin 21 with the spring 20 fitted therein is fitted into the spring receiver 17 so as to be movable up and down.
The lower end convex portion 22 of the locking pin 21 is fitted into a long hole 23 formed in an arc shape in the lower member 2b, and the end surface of the stepped portion 24 formed between the convex portion 22 and the convex portion 22. The recessed step 25 on the upper edge of the elongated hole 23
and slide it. Furthermore, the above long hole 2
A round groove 26 deeper than the recessed step 25 is provided at both ends of 3.
When the locking pin 21 moves to one end or the other end of the elongated hole 23, the step 24 of the locking pin 21 falls from the recessed step 25 into the round groove 26 due to the elasticity of the spring 20. to lock the rotation of arm 3. To release this lock,
What is necessary is to push the lower end convex portion 22 of the locking pin 21 and push the step portion 24 up to the recessed step portion 25 . Furthermore, the fifth
As shown in the figure, the screw 11 is inserted through the rotating convex portion 15 of the lower member 2b and screwed into the female screw 27 embedded integrally in the rotating convex portion 15 of the upper member 2a. The convex portions 13 of the members 2a and 2b are similarly fixed with screws.

Further, as shown in FIG. 3, the pair of tripod holders 6, 7 are integrally molded with slide parts 31, 32 which are slidably fitted to the arms 3, 4, 5. One slide part 31 is further integrally formed with a protrusion 33, and this protrusion 33 is attached to the other slide part 32.
It is slidably fitted into the recess 34 of. Then, by screwing a screw 36 into a screw hole 35 provided on this recess 34 and pressing the protrusion 33 with the tip of this screw 36, one slide portion 31 is connected to the arm 3,
4 and 5, and at the same time, fix the other slide part 32 to this one slide part 31,
The lower end of the tripod 37 (shown in FIG. 2) is held between the tripod holders 6 and 7. By loosening the screw 36, the movement of the slide parts 31, 32 relative to the arms 3, 4, 5 can be adjusted and the tripod holders 6, 7 can be released from the clamp.

Furthermore, as shown in FIGS. 6 and 7 as well as this FIG. Insert the tongue pieces 42 into the ends of the arms 3, 4, and 5 through the openings at their ends, and insert the screws 44 inserted into the interior from the lower surfaces of the arms 3, 4, and 5 through the lower holes 43 of the member 41 into the tongue pieces 42.
The stand mounting member 41 is fixed to the arm by screwing into the screw hole 45 of the stand mounting member 41. Furthermore, a shaft attachment part 46 is integrally molded on this mounting member 41, and a pair of shaft attachment parts 47 integrally molded on the upper part of the stand 8 are fitted into a pair of grooves provided in this shaft attachment part 46, and both Matching pin holes 48, 49 (shown in Figure 3)
By inserting a pin 50 into the stand 8, the stand 8 is rotatably supported. The tip 5 of this stand 8
1, a grounding portion cover 52 is fitted thereto. Further, a screw hole 53 is provided in the middle portion of this stand 8, and a mounting screw 55 of the caster 9 is screwed into this screw hole 53 from the back side of the stand 8 (the side surface facing outside of the stand 8 when the stand is in contact with the ground). 54 is a wheel of the caster 9.

Furthermore, an inverted T is attached to the bottom surface of the stand mounting member 41.
A shaped convex portion 56 is integrally molded, a pair of clamping pieces 57 are provided protruding from the stand 8 to the convex portion 56, and the pair of clamping pieces 57 are elastically fitted into the left and right grooves of the convex portion 56. By doing so, the stand 8 is held in a folded state below the arms 3, 4, and 5 as shown in FIG. At this time, the rolling wheels 54 of the caster 9
is grounded, and this dolly is movable. In the state shown in FIG. 6, the lower surfaces of the left and right sides of the stand mounting member 41 and the upper surfaces of the left and right sides of the stand 8 engage as stopper surfaces, as shown in FIG.

Also, as shown in Figures 8 and 9, when fixing the dolly in place, the stand 8 is opened approximately 120 degrees from the bottom of the arms 3, 4, and 5, and the caster is grounded. The rolling wheels 54 of No. 9 are made to float above the ground surface. Note that in this stand grounded state, a stopper 58 provided at the front end of the stand attachment member 41 and a stopper 59 provided at the upper end of the stand 8 are engaged.

Note that even when the stand 8 is grounded and the wheels 54 of the caster 9 are grounded, the arms 3, 4,
The length of the stand 8, the mounting position of the caster 9, etc. are taken into consideration so that the height of the stand 5 from the ground surface does not change.

[Effect of idea]

According to the present invention, a socket-shaped stand mounting member is fitted onto the outer periphery of the tip of each long cylindrical arm, and a tongue piece integrally formed inside the stand mounting member is inserted into the interior through the opening at the end of the arm. The stand mounting member is fixed to the arm by screwing the screw inserted from the bottom of the stand mounting member through the arm into the tongue piece, and the stand with caster is attached to the shaft attachment part integrally molded on the stand mounting member. Since the upper part of the frame is rotatably attached to the shaft, the socket-shaped stand mounting member is fitted into the opening at the end of the arm, which is almost unprocessed, and the stand mounting member is fixed with a single screw. can be easily fixed, and a stand with casters can be easily attached via this member. In addition, a convex portion that fits with the clamping piece integrally provided on the stand when the stand is folded is integrally molded on the lower part of the stand mounting member, and a stopper that engages with the upper part of the stand when it is in the grounded state is integrally molded on the stand mounting member. Since it is integrally molded, it is possible to reliably maintain the stand folded state or stand grounded state. By rotating the stand, either the stand or the caster is brought into contact with the ground, eliminating the need for a conventional caster with a rolling wheel locking mechanism. The foot pedals of the rolling wheel locking mechanism do not interfere with each other when folding, and the three arms can be folded compactly.

[Brief explanation of the drawing]

The figures show an embodiment of the tripod dolly of the present invention, in which Fig. 1 is a partially cutaway plan view, Fig. 2 is a partially cutaway front view, and Fig. 3 is an exploded perspective view.
Figure 4 is a partially cutaway plan view of the center member, Figure 5 is a sectional view taken along the - line in Figure 4, Figure 6 is a sectional view of the stand attachment part when the caster is in contact with the ground, and Figure 7 is a cutaway of that part. FIG. 8 is a sectional view of the stand mounting portion when the stand is in contact with the ground, and FIG. 9 is a side view of that portion. 3, 4, 5... Arm bar, 6, 7... Tripod holder, 8
... Stand, 9 ... Caster, 41 ... Stand mounting member, 42 ... Tongue piece, 44 ... Screw, 46
... shaft attachment part, 56 ... convex part, 57 ... clamping piece, 5
8...Stotsupa.

Claims (1)

[Scope of utility model registration request] In a tripod dolly, the tripod is supported by tripod holders provided on three long cylindrical arms and is moved by casters provided at the tips of each of the arms,
A socket-shaped stand mounting member is fitted onto the outer periphery of the tip of each arm, and the tongue piece integrally formed inside the stand mounting member is inserted into the opening at the end of the arm, and the arm is attached from the bottom of the stand mounting member. The stand mounting member is fixed to the arm by screwing the screw inserted through the tongue piece into the tongue piece, and the upper part of the stand is rotatably mounted on the shaft fitting part integrally molded on the stand mounting member, The lower part of the stand mounting member is integrally molded with a convex part that fits into the clamping piece integrally provided on the stand and the stand when the stand is folded, and the stand mounting member is integrally molded with a stopper that engages with the upper part of the stand when it is in contact with the ground. A tripod dolly, characterized in that a caster is attached to a side surface of the stand facing outward when the stand is in contact with the ground, and either the stand or the caster is grounded by rotation of the stand.