JPH0349623Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a rotation operating device for a rotary pot used for cooking rice, etc.

[Conventional technology]

Conventionally, as a general rotation operation device for a rotary hook as described above, the hook body is supported by a pair of left and right legs so as to be rotatable in the front and rear directions on left and right axes, and the hook body is fixed. Generally, a worm wheel is fitted and fixed to one of the shafts, a worm that engages with the worm wheel is provided on the handle shaft, and the handle shaft is pivotally supported by a support member fixed to one of the legs. This rotary operation device transmits rotational force to one shaft via the worm and worm wheel when the operator has finished heating the contents inside the pot body by turning the handle shaft. It is used to take out the contents from the pot by tilting it forward, and then to return the pot to the horizontal position by turning the handle shaft in the opposite direction. However, if an external force such as a collision with a person or equipment causes an involuntary rotational force to act on the handle shaft, the hook body may fall forward, which is dangerous.

As a countermeasure against this problem, conventionally, as shown in Japanese Utility Model Application Publication No. 51-12638, a gear is fitted and fixed to the handle shaft, and a stopper shaft whose tapered tip removably engages with the gear is attached to the handle shaft. A spring is provided between the cylindrical portion and the stopper shaft to bias the stopper shaft toward the gear, and a knob with a circular plane is provided at the upper end of the stopper shaft. There is a device in which a V-shaped convex portion provided on the knob is removably engaged with a V-shaped concave portion provided on the upper end surface of the cylindrical portion.

This rotary operating device engages the protrusion provided on the knob with the recess provided on the upper end surface of the cylindrical portion of the bracket when the hook body is in a horizontal state, holds the stopper shaft in a lowered state, and rotates the stopper shaft. By engaging the tapered tip between the teeth of a gear fitted and fixed to the handle shaft, the handle shaft is prevented from involuntarily rotating due to external force and the hook body is prevented from falling forward. There is. Then, by holding the knob and pulling up the stopper shaft against the spring, the operator removes the tip of the stopper shaft from between the teeth of the gear and the convex part of the knob from the recess of the cylindrical part provided in the bracket. , the tip of the stopper shaft and the convex portion are held in a disengaged state by rotating the knob together with the stopper shaft and supporting the convex portion on a portion of the upper end surface of the cylindrical portion where there is no concave portion; By operating the handle shaft, the hook body is tilted forward or returned to the horizontal position from the forward tilted state, and then the knob is rotated to make the convex part and the concave part face each other, and by releasing the hand, the spring is activated. The stopper shaft is lowered so that, as described above, the engagement protrusion and the engagement groove and the stopper shaft and gear are engaged with each other.

[The problem that the idea attempts to solve]

However, in the conventional rotary hook rotation operation device described above, if the spring force of the spring that biases the stopper shaft downward is strengthened, a large amount of force is applied when holding the knob to pull up the stopper shaft and rotate it around the shaft. This requires a great deal of effort from the operator, and if the operator's hands are wet, the handle may slip off the handle, making the operation difficult.
Therefore, if the spring force of the spring is weakened, the groove between the teeth of the gear is wide on the outer circumferential side and the tip of the stopper shaft is tapered, so the gear has a large number of teeth and the tip of the stopper shaft is deep between the teeth. Since the stopper shaft is not fitted, there is a problem that if a large external force is applied to the stopper shaft, the tip of the stopper shaft may come off from the gear and the hook body may fall.

This invention is an attempt to solve the above-mentioned problem, and even if the spring force of the spring urging the stopper shaft downward is strong, the stopper shaft can be easily rotated with a small force. Another object of the present invention is to provide a rotation operating device for a rotary hook that can reliably restrain the handle shaft and is highly safe.

[Means to solve the problem]

This idea consists of a pair of legs 1 and 2 on the left and right sides, and a hook body 5.
is rotatably supported in the front and back direction by left and right shafts 3 and 4, and a worm wheel 6 is fitted and fixed to one of the shafts 4 fixed to the hook body, and a worm that fights with the worm wheel 6 is mounted. 7 is provided on a horizontal handle shaft 8, and the handle shaft 8 is rotatably supported on a support member 9 fixed to one leg 2. In this device, a collar is fitted and fixed to the handle shaft 8. 11 Form engagement recesses 11a in the form of rectangular grooves at several locations in the circumferential direction on the outer circumferential surface, and fit a vertical stopper shaft 13 perpendicular to the handle shaft 8 into the cam cylinder 12 fixed to the support member 9. An engagement protrusion 13a that removably engages with one of the engagement recesses 11a is provided at the lower end of the shaft 13, and a coil spring 15 biases the stopper shaft 13 toward the collar 11.
is provided between the stopper shaft 13 and the cam cylinder 12,
Also, along the circumferential direction of the upper end surface of the cam cylinder 12, it intersects at an acute angle with the horizontal side of the upper end surface, the vertical side that intersects the upper end surface at right angles, and forms an inclined surface that moves the stopper shaft 13 in the opposite direction to the collar. Forming a right triangular cam groove 12a formed by the hypotenuse,
A pin 14 protruding from the outer periphery of the stopper shaft 13 is slidably engaged with the cam groove 12a, and a
A stopper handle 16 having a lever portion protruding from the outer periphery of a stopper shaft 13 is fixed.

[Effect]

The rotary pot rotation operation device according to this invention is the fourth
As illustrated in FIG. 5, a pin 14 protruding from the outer periphery of the stopper shaft 13 engages with the lower end of the cam groove 12a formed in the upper end surface of the cam cylinder 12 fixed to the leg 2 side, and the stopper In order to tilt the hook body 5 forward from its horizontal state in which the engagement protrusion 13a provided at the lower end of the shaft 13 is engaged with the engagement recess 11a of the collar 11 fixed to the handle shaft 8, the stopper shaft 13 is The operator manually pulls the stopper handle 16 fixed to the upper end of the stopper shaft 13.
By rotating and raising the pin 14, the pin 14 can be removed from the cam groove 12a of the cam barrel 12, and the engagement protrusion 13a can be removed from the engagement recess 11a of the collar 11. Even if the spring force of the biasing coil spring 15 is increased, it can be easily done with a small force. That is, since the cam groove 12a has a right triangular shape, even if the cam cylinder 12 has a small diameter and a short length in the circumferential direction, compared to an isosceles triangular shape such as a V groove. Since the slope of the stopper handle 12a can be made longer to make the slope gentler, the stopper handle 16 has a lever part protruding from the outer periphery of the stopper shaft 13, and if the tip of this lever part is pulled by hand, the principle of leverage is achieved. Stopper shaft 13 with smaller force
Even if the spring force of the coil spring 15 is increased, the stopper shaft 13 can be raised and the engagement protrusion 13a can be easily removed from the engagement recess 11a.

Further, as described above, by increasing the spring force of the coil spring 15, the stopper shaft 13 can be moved to the collar 1.
1 side, and in the horizontal state of the hook body 5 shown in FIGS. 4 and 5, the engagement recess 11 of the collar 11
a has a rectangular groove shape, and the engagement protrusion 13a provided at the lower end of the stopper shaft 13 engages with one of these grooves, and because the engagement protrusion 13a does not need to be tapered, a large external force is not applied. Even if the handle shaft 8 is acted upon, there is no fear that the engagement protrusion 13a and the engagement recess 11a will disengage, and the handle shaft 8 can be reliably restrained, which rotates and tilts the hook body 5 forward. This can definitely be prevented.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings.

In Figures 1 to 3, 1 and 2 are a pair of left and right legs, and the hook body 5 is supported by horizontal left and right shafts 3 and 4 placed at the upper ends of the legs 1 and 2. It is pivotally supported by legs 1 and 2 so as to be rotatable in the front-back direction. Second
As shown in Fig. 3, one shaft 4 is attached to the hook body 5
A worm wheel 6 is fixed to one side of the shaft 4, and a worm wheel 6 is fitted and fixed to the shaft 4. A worm wheel 7 that engages with the worm wheel 6 is provided on the handle shaft 8.
is rotatably supported by a support member 9 fixed to the
An operating handle 10 is fitted and fixed to the front end of the handle shaft 8.

As shown in FIGS. 3 to 5, the lock mechanism has a collar 11 fitted and fixed to the handle shaft 8.
On the outer peripheral surface of the collar 11, rectangular groove-shaped engagement recesses 11a extending in the axial direction are formed at four equal intervals in the circumferential direction. A cam barrel 12 is fixed to the support member 9, and the cam barrel 12 is arranged perpendicularly on the collar 11 with almost no clearance therebetween so that its axis is orthogonal to the horizontal handle shaft 8. A stopper shaft 13 is fitted so that it can reciprocate and rotate. A coil spring 15 is interposed between the annular spring retainer 20 fitted and fixed to the inner circumferential surface of the cam cylinder 12 and the large diameter portion of the stopper shaft 13, and this spring 15 causes the stopper shaft 13 to move toward the collar 11 side, that is, downwardly. is energized by An engagement protrusion 13a that removably engages with one of the engagement recesses 11a of the collar 11 is formed at the lower end of the stopper shaft 13, and a pin 14 is inserted from the upper outer peripheral surface of the stopper shaft 13 at right angles to the axial direction thereof. is installed protrudingly. Further, along the circumferential direction of the upper end surface of the cam cylinder 12, a horizontal side of the upper end surface, a vertical side that intersects at a right angle with this upper end surface, and an inclined surface that intersects at an acute angle and moves the stopper shaft 13 in the opposite direction of the collar. A cam groove 12a is provided in the shape of a right triangle formed by a hypotenuse, and a pin 14 is slidably supported in this cam groove 12a. A stopper handle 16 having a lever portion protruding from the outer peripheral surface of the stopper shaft 13 is fixed to an upper end portion of the stopper shaft 13 that protrudes from the cam cylinder 12. In addition, in FIG. 2, 17 is a gear case housing the worm wheel 6 and worm 7, in FIGS. 1 and 2, 18 is a lid that covers the hook main body 5 in an openable and closable manner, and in FIG. 3, 19 is a handle shaft. 8 is a bearing that pivotally supports the support member 9.

Next, the operation of the embodiment configured as above will be explained. When the hook body 5 is horizontal, as shown in FIGS. 4 and 5, the pin 14 of the stopper shaft 13
is located at the lower end of the cam groove 12a provided in the cam barrel 12 and in contact with the vertical side, the engagement protrusion 13a provided at the lower end of the stopper shaft 13 protrudes downward from the lower end surface of the cam barrel 12, The engagement protrusion 13a is connected to the engagement recess 1 of the collar 11 fixed to the handle shaft 8.
1a and the stopper shaft 13 is biased downward by the coil spring 15, the handle shaft 8 and the operating handle 1 fixed thereto are
0 rotation is restricted.

In this state, even if an external force is applied to the operating handle 10, the handle shaft 8 will not rotate, and the worm 7 provided on the handle shaft 8 and the worm wheel 6 fixed to the shaft 4 of the hook body 5 will not rotate. Since they are engaged and the hook body 5 does not tilt unless the handle shaft 8 rotates, it will not tilt due to external force. In this state, the operator grasps the stopper handle 16 and pulls it toward the user to remove the stopper shaft 13.
When the pin 14 is rotated, the pin 14 slides in the upward direction on the inclined side of the cam groove 12a and is supported by the upper end surface of the cam cylinder 12. Therefore, the stopper shaft 13 rotates and rises against the coil spring 15, and the engagement protrusion 1
3a is pulled out from the engagement recess 11a of the collar 11, and the handle shaft 8 is in a state where it can freely rotate. In this state, by turning the operating handle 10, rotational force is transmitted to the shaft 4 via the handle shaft 8, the worm 7, and the worm wheel 6.
The hook body 5 can be rotated forward about the pivot point 4. Therefore, operations such as opening the lid 18, tilting the pot body 5 forward, taking out the heated contents from the pot body 5, and returning the pot body 5 to its upright position after removal are the same as in the conventional case. I can do it.

Further, when the stopper shaft 13 is in the raised state, when the operator manually pushes the stopper handle 16 to the rear and rotates the stopper shaft 13 in the opposite direction, the pin 14 slides on the inclined surface of the cam groove 12a in the downward direction. and move to the bottom position opposite to that vertical side. In this case, if the engagement protrusion 13a of the stopper shaft 13 is not aligned with the engagement recess 11a of the collar 11, the engagement protrusion 13a will be supported on the outer peripheral surface of the collar 11, but when the operation handle 10 is operated, By rotating the shaft 8, any one of the engagement recesses 11a of the collar 11 becomes the engagement protrusion 13a.
When the stopper shaft 13 is biased by the coil spring 15, the engagement protrusion 13a engages with the engagement recess 11a. Note that when the stopper shaft 13 is rotated in the opposite direction, the engagement protrusion 13a
If they coincide with the engagement recess 11a, they will immediately engage.

[Effects of the invention] As explained above, in this invention, the hook main body 5 is rotatably supported in the front and rear direction by the left and right shafts 3 and 4 on the left and right pair of legs 1 and 2, A worm wheel 6 is fitted and fixed to one shaft 4 fixed to the hook body,
In a rotation operation device for a rotary hook, a worm 7 that engages with the worm wheel 6 is provided on a horizontal handle shaft 8, and the handle shaft 8 is rotatably supported on a support member 9 fixed to one leg 2. Rectangular groove-shaped engagement recesses 11a are formed at several locations in the circumferential direction on the outer circumferential surface of the collar 11 that is fitted and fixed to the collar 8,
A stopper shaft 13 perpendicular to the handle shaft 8 is fitted into the cam cylinder 12 fixed to the support member 9, and the engagement recess 1 is inserted into the lower end of the stopper shaft 13.
An engagement protrusion 13a that removably engages with one of the elements 1a.
A coil spring 15 for biasing the stopper shaft 13 toward the collar 11 is provided between the stopper shaft 13 and the cam cylinder 12, and a coil spring 15 is provided between the stopper shaft 13 and the cam cylinder 12, and a coil spring 15 is provided between the stopper shaft 13 and the cam cylinder 12, and A right triangular cam groove 12a is formed by a horizontal side, a vertical side that intersects at a right angle with the upper end surface, and an oblique side that intersects at an acute angle and becomes an inclined surface for moving the stopper shaft 13 in the opposite collar direction. A pin 14 protruding from the outer periphery of the stopper shaft 13 is slidably engaged with the cam groove 12a, and the cam cylinder 1 of the stopper shaft 13 is inserted into the cam groove 12a.
A stopper handle 1 having a lever portion protruding from the outer periphery of a stopper shaft 13 at an upper end portion protruding above 2;
Since 6 is fixed, the following effect can be obtained.

That is, the rotary hook rotation operating device according to this invention has a stopper at the lower end of a cam groove 12a formed on the upper end surface of a cam cylinder 12 fixed to the leg 2 side, as illustrated in FIGS. 4 and 5. The hook body 5 is engaged with a pin 14 protruding from the outer periphery of the shaft 13, and an engagement protrusion 13a provided at the lower end of the stopper shaft 13 is engaged with an engagement recess 11a of a collar 11 fixed to the handle shaft 8. To tilt the pin forward from the horizontal position, the operator manually pulls the stopper handle 16 fixed to the upper end of the stopper shaft 13, rotates the stopper shaft 13, and raises the pin 14. The engaging protrusion 13a is inserted into the engaging recess 11 of the collar 11 from the cam groove 12a of the cam cylinder 12.
The coil springs 1 that bias the stopper shaft 13 toward the collar 11 side, that is, downwardly, are removed from a.
Even if the spring force in step 5 is made stronger, it can be easily done with a small force. That is, since the cam groove 12a has a right triangular shape, even if the cam cylinder 12 has a small diameter and a short length in the circumferential direction, the cam groove 12a The inclination of the stopper handle 16 can be made gentler by lengthening the inclined side of the stopper shaft 13. Therefore, if the stopper handle 16 has a lever part that protrudes from the outer periphery of the stopper shaft 13, and the tip of this lever part is pulled by hand, it will be moved by the lever principle. It is possible to rotate the stopper shaft 13 with a small force, so even if the spring force of the coil spring 15 is increased, the stopper shaft 13 can be rotated with a small force.
The engaging protrusion 13a can be easily removed from the engaging recess 11a by raising the engaging protrusion 13a, thereby reducing the labor of the operator. Furthermore, as described above, by increasing the spring force of the coil spring 15, the stopper shaft 13 is strongly urged toward the collar 11,
In the horizontal state of the hook body 5 shown in FIGS. 4 and 5,
The engagement recess 11a of the collar 11 has a rectangular groove shape,
An engaging protrusion 13a provided at the lower end of the stopper shaft 13 engages with one of these, and since the engaging protrusion 13a does not need to be tapered, it can be used even when a large external force is applied to the handle shaft 8, etc. , engagement protrusion 13a
There is no fear that the handle shaft 8 will be disengaged from the engagement recess 11a, the handle shaft 8 can be reliably restrained, and the hook main body 5 can be reliably prevented from tilting forward due to rotation of the handle shaft 8.
Highly safe.

[Brief explanation of drawings]

The drawings show one embodiment of this invention, with Fig. 1 being a schematic front view, Fig. 2 being a schematic side view, Fig. 3 being a perspective view of the main part, and Fig. 4 being a half-cut front view of the locking mechanism.
FIG. 5 is a side view of the same. 1, 2...Legs, 3, 4...Shaft, 5...Kettle body,
6... Worm wheel, 7... Worm, 8...
... Handle shaft, 9 ... Support member, 10 ... Operation handle, 11 ... Collar, 11a ... Engagement recess,
12...Cam tube, 12a...Cam groove, 12a, 1
3...stopper shaft, 13a...engaging protrusion, 14
...Pin, 15...Coil spring, 16...Stopper handle.

Claims (1)

[Scope of utility model registration request] A hook body 5 is supported on a pair of left and right legs 1 and 2 so as to be rotatable in the front and back direction with left and right shafts 3 and 4, and a worm wheel 6 is attached to one shaft 4 fixed to the hook body. Rotating operation of a rotary hook in which a worm 7 that is fitted and fixed and meshes with the worm wheel 6 is provided on a horizontal handle shaft 8, and this handle shaft 8 is rotatably supported on a support member 9 fixed to one leg 2. In the device, rectangular groove-shaped engagement recesses 11 are provided at several locations in the circumferential direction on the outer peripheral surface of the collar 11 that is fitted and fixed to the handle shaft 8.
a cam cylinder 1 fixed to the support member 9;
A vertical stopper shaft 13 extending perpendicularly to the handle shaft 8 is fitted into the handle shaft 8, and a cylindrical engagement protrusion 13a is provided at the lower end of the stopper shaft 13 to removably engage with one of the engagement recesses 11a. The stopper shaft 1
3 toward the collar 11 side is provided between the stopper shaft 13 and the cam cylinder 12, and extends along the circumferential direction of the upper end surface of the cam cylinder 12 between the horizontal side of the upper end surface and the upper end surface of the cam cylinder 12. A right triangular cam groove 12a is formed by a vertical side that intersects at right angles with the end surface and an oblique side that intersects at an acute angle and becomes an inclined surface for moving the stopper shaft 13 in the opposite direction of the collar. A stopper handle 16 having a lever portion protruding from the outer circumference of the stopper shaft 13 is fixed to the upper end surface of the stopper shaft 13 protruding above the cam cylinder 12 by slidably engaging the pin 14 protruding from the outer circumference of the stopper shaft 13. A rotation operation device for a rotary pot, which is characterized by: