JPH0247943Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a crank handle device used for raising and lowering the floor of a bed, examination table, or patient carrier.

(Prior art and its problems) A crank handle device for raising and lowering the floor of a bed etc.
If the screw shaft B is stuck out from the floor support frame all the time, it becomes a hindrance to traffic, so conventionally, for example, as shown in Fig. 6, the screw shaft b attached to the floor support frame a of the bed is bent in the middle. However, there was a problem in that it was difficult to store it in a sufficiently compact storage state.

The present invention aims to solve such problems.

(Means for Solving the Problems) The configuration of the present invention is shown in FIGS. 1 to 5 corresponding to embodiments.
To explain based on the drawings, the present invention provides a crank arm 4 in a crank handle device 3 configured at the end of a drive shaft 1 connected to a lifting mechanism for a floor such as a bed.
consists of a fixed arm part 4a on the side of the drive shaft 1, and a movable arm part 4b provided at the tip of the fixed arm part 4a so as to be bendable at least outwardly of the fixed arm part 4a, and the movable arm part 4b A grip 5 is provided at the tip of the movable arm portion 4b so that it is parallel to the drive shaft 1 in an unbent state, and the movable arm portion 4b is further bent toward the outside of the fixed arm portion 4a. The fixed arm portion 4a is configured to be covered with the grip 5, and the movable arm portion 4 is covered with the grip 5.
A bent portion 6 is provided so that b does not protrude outward.

(Function) In the above configuration, when the crank handle device of the present invention is not in use, when the movable arm portion 4b is bent toward the outside of the fixed arm portion 4a, the movable arm portion 4b is bent together with the grip 5. The fixed arm portion 4a
Since the movable arm portion 4b is provided with the bending portion 6, it can be stored in a very compact state.

(Example) Next, the present invention will be described in more detail with reference to an example.
First, the fixed arm portion 4a is attached to the drive shaft 1 via the attachment shaft 2, and is configured to be able to freely move forward and backward to transmit rotational force. If the mounting shaft 2 is movable along the drive shaft 1 and has a configuration that can transmit the rotational torque of the fixed arm 4a to the drive shaft 1, it can be connected to the drive shaft 1 as shown in FIG. 4a, for example. Any suitable configuration may be used, such as configuring the fitting portion of the mounting shaft 2 in an irregular shape, or configuring it to be engaged by a key 7 as shown in FIG. 4B. Further, as described above, the movable arm portion 4b may be provided at the tip of the fixed arm portion 4a so as to be bendable at least in the outward direction of the fixed arm portion 4a. A fulcrum 8 is provided, and at least the movable arm portion 4b
is configured so that it can be bent toward the outside of the fixed arm portion 4a. Further, since the grip 5 is a grip for rotating the crank handle device 3 by grasping it by hand, it is provided so as to be freely rotatable by a suitable rotation shaft 9.

In the above configuration, when the crank handle device 3 in the retracted state is brought into use, even if the grip 5 is first grasped by hand and the crank handle device 3 is rotated, the floor support frame 13, bedding, etc. The entire crank handle device 3 is pulled out to the outside to the extent that the crank arm 4 can be easily rotated without colliding with each other, and then the movable arm is bent at the bending fulcrum 8 and is placed over the fixed arm 4a. 4b and the grip 5 are separated from the fixed arm 4a and extended until the grip 5 becomes parallel to the mounting shaft 2, then by rotating the grip 5 by hand, it can function as a normal crank handle device. .

It goes without saying that the order of pulling out the crank handle device 3 and separating the movable arm 4b and the grip 5 from the fixed arm 4a may be reversed.

On the other hand, in order to change the crank handle device 3 from the used state to the retracted state, it is sufficient to perform the reverse procedure for bringing it into the used state. That is, by bending the movable arm portion 4b at the bending fulcrum 8 and placing the movable arm portion 4b and the grip 5 on the fixed arm portion 4a, if the entire crank handle device 3 is pushed in the direction of the drive shaft 1, it will be in the retracted state. can do. In this case as well, as in the case of putting it into use, it goes without saying that the order of placing the movable arm 4b and grip 5 over the fixed arm 4a and pushing the crank handle device 3 may be reversed. . In addition,
In FIG. 5, L1 indicates the storage length, and L2 indicates the crank length.

(Effect of the invention) As described above, the crank handle device of the invention is composed of a movable arm, a fixed arm, and a grip, and when not in use, the movable arm can be bent toward the outside of the fixed arm. As a result, the movable arm can be placed over the fixed arm along with the grip, so it can be stored in a very compact state, and there is an effect that it is possible to prevent feet from getting caught when walking. In particular, if the fixed arm is configured to move forward and backward with respect to the drive shaft connected to the floor lifting mechanism,
This has the advantage of being easier to use and store.

[Brief explanation of drawings]

Figures 1 to 5 correspond to embodiments of the present invention; Figure 1 is a sectional view of the entire crank handle device, Figure 2 is a schematic diagram of the crank handle device in use, and Figure 3 is a schematic diagram of the retracted state. , Fig. 4 is a detailed view of the fitting part between the drive shaft and the mounting shaft, and is a sectional view taken along the line A-A in Fig. 1, and Fig. 5 shows the outer surface of the fixed arm, the movable arm, and the grip. FIG. 6 is a side view showing an embodiment configured to be in close contact with each other when in a retracted state, and FIG. 6 is a side view showing a conventional example. Code 1... Drive shaft, 2... Mounting shaft, 3... Crank handle device, 4... Crank arm, 4a...
Fixed arm part, 4b... Movable arm part, 5... Grip,
6...Bending part, 7...Key, 8...Refraction fulcrum,
9...Rotation axis, 10...Outside surface of fixed arm, 11
...outer surface of the movable arm, 12...outer surface of the grip, 13...floor support frame.

Claims (1)

[Scope of utility model registration request] In a crank handle device configured at an end of a drive shaft connected to a lifting mechanism for a floor such as a bed, the crank arm includes a fixed arm on the drive shaft side, and at least a fixed arm at the tip of the fixed arm. a movable arm provided so as to be freely bendable in an outward direction, and a grip is provided at the tip of the movable arm so that the movable arm is parallel to the drive shaft in an unbent state; Further, the movable arm is bent outward of the fixed arm so as to cover the fixed arm together with the grip, and has a bent portion so as not to protrude outward in the covered state. A crank handle device for raising and lowering a floor part of a bed, etc.