JP2015013579A - Travel propriety switching unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a travel propriety switching unit capable of preventing wobble.SOLUTION: The travel propriety switching unit comprises: a bolt lever 1 vertically attached to a member to be attached A; a member 2 with screw hole for screwing to the bolt lever 1; a pad 4 for grounding attached to a lower end 3 of the bolt lever 1; and a caster 7 having a caster body 5 fitted to the bolt lever 1 rotatably around a wheel center Lof the bolt lever 1 and a travel wheel 6. By screwing advance and retreat of the bolt lever 1 and the member 2 with screw hole, a vertical movable area H of the caster 7 can be changed, for allowing switching of a state between a travel possible state in which the travel wheel 6 of the caster 7 receives load F during grounding, and a non-travel state in which the pad 4 receives the load F during grounding.

Description

  The present invention relates to a travel enable / disable switching device.

  In the past, the present applicant has proposed a device for moving the floor contact portion up and down as a travelability switching device that is attached to the attachment member and is capable of switching between the travelable state and the non-travelable state of the traveling wheel of the caster. (For example, refer to Patent Document 1).

  However, since there is a gap between the attachment body attached to the attachment member and the rotary operation body, there is a drawback that rattling occurs. In addition, since the number of parts is large and the structure is complicated, it takes time to manufacture and assemble. Further, since the reaction force from the ground surface is transmitted to the upper mounting body one after another by transmitting small parts, there is a disadvantage that it is easy to cause rattling and disadvantageous in strength.

Utility Model Registration No. 3129344

  The problem to be solved is that it causes rattling. In addition, it takes time to manufacture and assemble. In addition, strength and rigidity are insufficient.

  Accordingly, the travel propriety switching device according to the present invention is attached to a bolt rod that is vertically attached to the member to be attached, a member with a screw hole that is screwed to the bolt rod, and a lower end of the bolt rod. A grounding pad, and a caster having a caster body and a traveling wheel that are externally fitted to the bolt rod so as to be rotatable around the axis of the bolt rod, and the screw rod of the bolt rod and the member with the screw hole is advanced and retracted. By changing the upper and lower movable range of the caster, it is possible to switch between a traveling state in which the traveling wheel of the caster receives a load at the time of grounding and a non-traveling state in which the pad receives a load at the time of grounding. It is composed.

The screw hole-attached member is fixed to the attachment member or formed with a part of the attachment member, and the travelable state is achieved by screwing and retracting the bolt rod to the screw hole attachment member. And switchable to the non-running state.
Further, the screw holed member is disposed at an intermediate position between the upper attachment member and the lower caster, and can be switched between the runnable state and the non-running state by screwing back and forth of the screwholed member. It is what.

Further, the caster has two traveling wheels, the two traveling wheels are provided apart from each other in the direction of the rotation axis, and the pad is disposed at an intermediate position between the two traveling wheels when viewed from the front in a traveling state. Is provided.
Further, at least the grounding portion of the pad is made of an elastic body.
Further, an elastic body is provided at the lower end of the bolt rod with the pad attached thereto.

  According to the travel enable / disable switching device of the present invention, rattling can be prevented. Further, the travelable state and the non-travel state can be switched with a small force. Moreover, manufacture and assembly can be easily performed. Moreover, it is excellent in strength and rigidity.

It is a front view which shows the 1st Embodiment of this invention. FIG. FIG. It is a semi-cylindrical cross section side view which shows the driving | running | working possible state of 2nd Embodiment. FIG. It is a semi-cylindrical cross section side view which shows the driving | running | working possible state of 3rd Embodiment. FIG. FIG. It is a semi-cylindrical cross section side view which shows the driving | running | working possible state of 4th Embodiment. FIG. FIG.

Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
1 to 3 show a first embodiment of the present invention. This travel propriety switching device is attached to the lower part of furniture, office equipment, or the like, and switches between a travelable state and a non-running state.

Bolts 1 attached vertically to a member to be attached A located below furniture, office equipment, and other equipment, a member 2 with a screw hole screwed into the bolts 1, and a bolt 1 the metallic grounding pad 4 which is attached to the lower end 3, a caster 7 with the caster body 5 and the traveling wheels 6 fitted on the axis L ₁ around the rotatably bolt rod 1 of the bolt lever 1 . The member 2 with a screw hole consists of a nut member. The caster 7 has two traveling wheels 6. Two running wheels 6 is provided apart from the rotation axis L ₂ direction, the pad 4 is disposed on the rotation axis L ₂ direction intermediate position of the two running wheels 6. That is, the pad 4 is disposed at an intermediate position between the two traveling wheels 6 when viewed from the front in the traveling state. A cylindrical frictional resistance reducing member 9 with an outer rod 8 for reducing the frictional resistance is provided at the fitting portion between the bolt rod 1 and the caster body 5. The caster 7 can be rotated with a light force by the cylindrical frictional resistance reducing member 9.

  The movable range H of the caster 7 is changed by screwing the bolt rod 1 and the screw holed member 2 back and forth so that the traveling wheel 6 of the caster 7 receives the load F at the time of grounding (see FIG. 2). The pad 4 is configured to be switchable to a non-running state (see FIG. 3) in which the pad 4 receives a load F at the time of grounding.

  Specifically, the screw hole member 2 is fixed to the attachment member A (by welding or the like). Switching between the travelable state and the non-running state is possible by screwing the bolt rod 1 back and forth to the threaded member 2. When the vertical movable range H is small, the vehicle is ready to run. When the up-and-down movable range H is large, the caster 7 can escape upward and enter a non-traveling state. Reference numeral 20 denotes a lock nut.

  4 and 5 show a second embodiment. A member 2 with a screw hole is disposed at an intermediate position between the upper attachment member A and the lower caster 7. The screw holed member 2 can be switched between a running state and a non-running state by screwing back and forth (with respect to the bolt rod 1). The bolt rod 1 has a bulging portion 21 for hanging a work tool at an intermediate position near the upper side, and the bolt rod 1 is attached to a nut body 22 fixed to the upper surface of the attachment member A by welding or the like. The bolt rod 1 is screwed and fixed to the attachment member A (so as not to move up and down). Reference numeral 23 denotes a lock nut, which fixes the position of the screw hole member 2 in the vertical direction (to prevent loosening).

  6 to 8 show a third embodiment. FIG. 6 shows a travelable state. FIG. 7 shows a non-traveling state where a small load is applied from above. FIG. 8 shows a non-running state where a large load is applied from above. An elastic body 11 is provided at the lower end 3 of the bolt rod 1 to which the pad 4 is attached. Demonstrates seismic isolation effect with elastic body 11 to reduce shaking such as earthquake. An annular plate 12 made of metal or plastic is fixed to the lower surface of the elastic body 11 integrally with the elastic body 11.

  The threaded member 2 is formed with a part of the attachment member A (not consisting of a nut member). Specifically, the attachment member A has a screw hole 13. Other configurations are the same as those of the first embodiment. 7 and 8, the traveling wheel 6 is not grounded due to friction or the like, but the traveling wheel 6 is usually lightly grounded.

  9 to 11 show a fourth embodiment. A through-hole is formed in a part of the attachment member A by pressing or the like, and at the same time, a short cylindrical standing wall 15 is formed, and a screw 14 is formed on the inner peripheral surface of the standing wall 15. An elastic body 11 is provided at the lower end 3 of the bolt rod 1 to which the pad 4 is attached, and an annular plate 12 is integrally fixed to each of the upper and lower surfaces of the elastic body 11. Other configurations are the same as those of the second embodiment. 10 and 11 show the case where the traveling wheel 6 is not grounded due to friction or the like, the traveling wheel 6 is usually lightly grounded.

In addition, this invention is a case where design change is possible, for example, is a case where the member 2 with a screw hole of 1st Embodiment is formed with a part of to-be-attached member A, Comprising: A short cylindrical standing wall 15 may be formed at the same time as a through hole is formed in a part by pressing or the like, and a screw 14 may be formed on the inner peripheral surface of the standing wall 15 (see FIGS. 9 to 11). ). Further, the nut body 22 of the second embodiment may be omitted and a screw hole may be provided in a part of the attachment member A. Further, the cylindrical frictional resistance reducing member 9 of the first embodiment may be omitted. Conversely, in the second embodiment, a cylindrical frictional resistance reducing member 9 may be provided. Further, the male screw portion of the bolt rod 1 is not intended across the axis L ₁ direction entire length, it may be obtained by forming only a part. Further, at least the grounding portion of the pad 4 may be made of an elastic body such as a spring or rubber.

Te is at 1-3, since the traveling state at the attachment member A and the ground state vertical spacing dimension H _a with (floor) is small (see FIG. 2), stability during travel There is also an advantage that it is excellent. Moreover, Te is at the FIGS. 4 and 5, since a travelable state in a state vertical spacing dimension H _a between the securing member A and the ground (floor) is large (see FIG. 4), an uneven Suitable for use on the ground (floor surface) (attachment member A does not interfere with uneven ground surface (floor surface))

As described above, the present invention attaches to the bolt rod 1 that is vertically attached to the attachment member A, the screw holed member 2 that is screwed to the bolt rod 1, and the lower end 3 of the bolt rod 1. A grounding pad 4, and a caster 7 having a caster body 5 and a traveling wheel 6 that are externally fitted to the bolt 1 so as to be rotatable about an axis L _{1 of} the bolt 1. The vertical movement range H of the caster 7 is changed by screwing back and forth of the member 2 with the screw hole so that the traveling wheel 6 of the caster 7 receives the load F at the time of grounding and the pad 4 is loaded at the time of grounding. Since it is configured to be switchable to the non-running state receiving F, rattling can be prevented. In addition, since the number of parts is small and the structure is simple, manufacturing and assembly can be easily performed. In addition, the reaction force from the ground surface is directly applied to the bolt 1 so that the strength is excellent.

Further, the screw holed member 2 is fixed to the attached member A or formed with a part of the attached member A, and the bolt rod 1 is advanced to and retracted from the screw holed member 2 by the traveling state. Since it can be switched to the non-running state, the number of parts is small and it is possible to prevent rattling from accumulating errors. Moreover, it is excellent in strength.
Further, a member 2 with a screw hole is disposed at an intermediate position between the upper member A to be attached and the lower caster 7 and can be switched between a travelable state and a non-running state by screwing back and forth of the screw holed member 2. Therefore, the number of parts is small and it is possible to prevent rattling from occurring due to the accumulated error. Moreover, it is excellent in strength.

Further, the caster 7 has two traveling wheels 6, and the two traveling wheels 6 are provided apart from each other in the direction of the rotation axis L < _b > 2, and are located at an intermediate position between the two traveling wheels 6 when viewed from the front in the traveling state. since the pad 4 is arranged, the axis L ₁ of the bolt lever 1, the distance of the rotation axis L ₂ of the running wheels 6 (Fig. 2, 4, 6, and, R shown in FIG. 9) It can be shortened and is excellent in strength.
In addition, since at least the grounding portion of the pad 4 is made of an elastic body, it exhibits a seismic isolation effect that reduces shaking such as an earthquake.
In addition, since the elastic body 11 is provided at the lower end 3 of the bolt rod 1 to which the pad 4 is attached, the seismic isolation effect that reduces shaking such as an earthquake is exhibited.

DESCRIPTION OF SYMBOLS 1 Bolt rod 2 Member with screw hole 3 Lower end 4 (For grounding) Pad 5 Caster body 6 Traveling wheel 7 Caster 8 Outer rod 9 Cylindrical friction resistance reducing member A Attachment member F Load H Vertical movable range L ₁ axis L ₂ rotation axis

Therefore, the running permission switching device according to the present invention includes: a screw hole with members which are secured to the securing member, the vertical shape of the bolt rod that is screwed into the screw hole member with, under end of the bolt rod and attached to a ground pad, and a caster having a fitted on caster body and traveling wheels rotatably the bolt lever about the axis of the bolt rod, with the threaded hole of the bolt rod The movable range of the caster is changed by screwing back and forth to the member so that the traveling wheel of the caster can receive a load during the grounding and the non-running state in which the pad receives the load during the grounding. Further, it is configured to be switchable , and the traveling wheel is grounded by its own weight in the non-traveling state .

Further, the attachment member has a screw hole, a vertical bolt rod screwed into the screw hole, a grounding pad attached to the lower end of the bolt rod, and around the axis of the bolt rod. A caster body having a caster body and a traveling wheel that are rotatably fitted on the bolt rod, and the vertical movable range of the caster is changed by screwing back and forth of the bolt rod to the screw hole. It is possible to switch between a runnable state in which the traveling wheels of the casters receive a load and a non-running state in which the pad receives a load at the time of ground contact, and the travel in the non-running state. The wheel is grounded with its own weight .
In addition, a bolt 杆 vertically attached to the member to be attached , a grounding pad attached to the lower end of the bolt と, and an outer fit to the bolt に so as to be rotatable about the axis of the bolt 上 記. A caster having a caster body and a traveling wheel, and a screw holed member screwed to the bolt rod and disposed at an intermediate position between the upper attached member and the lower caster ,
The upper and lower movable range of the caster is changed by screwing back and forth of the member with the screw hole, so that the traveling wheel in which the traveling wheel of the caster receives a load at the time of grounding and the pad receives the load at the time of grounding. In the non-traveling state, the traveling wheel is grounded by its own weight .

Further, the caster has two traveling wheels, the two traveling wheels are provided apart from each other in the direction of the rotation axis, and the pad is disposed at an intermediate position between the two traveling wheels when viewed from the front in a traveling state. Is provided.
Further, at least the grounding portion of the pad is made of an elastic body.
In addition, an elastic body that is elastically compressed by receiving a load acting on the pad is provided at the lower end of the bolt rod with the pad attached thereto .

The threaded member 2 is formed with a part of the attachment member A (not consisting of a nut member). Specifically, the attachment member A has a screw hole 13. Other configurations are the same as those of the first embodiment. Incidentally, At a 7 and 8, the traveling wheels 6 have been shown the case where not grounded by friction, traveling wheels 6 is grounded lightly.

DESCRIPTION OF SYMBOLS 1 Bolt rod 2 Member with screw hole 3 Lower end 4 (For grounding) Pad 5 Caster body 6 Traveling wheel 7 Caster 8 Outer rod 9 Cylindrical friction resistance decreasing member
11 Elastic body A Attachment member F Load H Vertical movement range L ₁ axis L ₂ rotation axis

Claims (6)

A bolt rod (1) that is vertically attached to the member to be attached (A), a screw holed member (2) that is screwed into the bolt rod (1), and a lower end of the bolt rod (1) ( and 3) the attached to a ground pad (4), the bolt axis of rod (1) (L ₁₎ caster body (5 fitted on the rotatably the bolt lever (1) around) and A caster (7) having traveling wheels (6),
The vertical movement range (H) of the caster (7) is changed by screwing back and forth of the bolt rod (1) and the threaded hole member (2), and the traveling wheel (6) of the caster (7) is brought into contact with the ground. The travel enable / disable switching device is configured to be switchable between a travelable state in which the pad (4) receives the load (F) and a non-running state in which the pad (4) receives the load (F) at the time of grounding.   The member with screw hole (2) is fixed to the member to be attached (A) or formed with a part of the member to be attached (A), and the member with screw hole of the bolt rod (1). The travel propriety switching device according to claim 1, wherein the travel enable / disable switching device can be switched between the travelable state and the non-running state by screwing back and forth to (2).   The screw holed member (2) is disposed at an intermediate position between the upper member to be attached (A) and the lower caster (7), and the traveling is performed by screwing the member with screw hole (2) forward and backward. The travel enable / disable switching device according to claim 1, wherein the travel enable / disable switching device is switchable between a possible state and the non-running state. The caster (7) has two traveling wheels (6), and the two traveling wheels (6) are provided apart from each other in the direction of the rotation axis (L ₂ ). The travel enable / disable switching device according to claim 1, 2 or 3, wherein the pad (4) is disposed at an intermediate position between the two travel wheels (6).   The travel propriety switching device according to claim 1, 2, 3, or 4, wherein at least a grounding portion of the pad (4) is made of an elastic body.   The travel propriety switching device according to claim 1, 2, 3, or 4, wherein an elastic body (11) is provided at a lower end (3) of the bolt rod (1) to which the pad (4) is attached.

Images