JPH0529067Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a mixer for mixing fertilizers, concrete materials, etc.

[Prior Art] Conventionally, as a device of this kind, Japanese Utility Model Application Publication No. 130130/1983 discloses a mixer in which a rotating drum is mounted on a frame and a motor is connected to the rotating drum via a power transmission device such as a chain. is proposed.

In such a mixer, when fertilizer or the like is put into the rotary drum, the rotary drum is not in a fixed state, so there is a problem that the rotary drum rotates due to the weight.

For this reason, there is a well-known mixer in which a rod-shaped lock body is provided on the pedestal so that it can move forward and backward, and the tip of the lock body is attached to and detached from the rotating drum so that the rotating drum can be temporarily fixed.

[Problem to be solved by the invention] In the above-mentioned conventional technology, fertilizer etc. are introduced while the rotating drum is temporarily fixed by a locking body,
Next, the lock body is removed and the motor is driven. However, if the motor is accidentally driven while it is fixed by the lock body, the motor may seize up or excessive force may be applied to the rotating drum or mount. , there is a risk of deformation.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and provide a mixer in which the motor cannot be driven when the rotating drum is in a fixed state.

[Means for Solving the Problems] In the present invention, a motor is connected via a power transmission device to a rotary drum mounted on a pedestal, a lock body that can be freely engaged and detached from the rotary drum is provided on the pedestal, and the lock body An interlock switch for the motor that responds to the body is provided on the pedestal.

[Operation] When the rotating drum is fixed by the locking body, the interlock switch cuts off the power to the motor, thereby preventing the motor from malfunctioning.

[Example] Next, an example of the present invention will be described with reference to the accompanying drawings.

1 to 3 show a first embodiment, in which reference numeral 1 denotes a box-shaped pedestal, and the pedestal 1 has an open top and rear surface. Reference numeral 2 denotes a cylindrical rotating drum that is mounted on the upper flange 3 of the pedestal 1 through a bearing 4, and an opening/closing lid 6 is mounted on a hinge 7 in a window hole (not shown) formed at a suitable position in the body 5. It is located in the central part. Further, a fixing metal fitting 8 is attached to the tip side of the opening/closing lid 6. In addition, stirring blades (not shown) are fixed to the inner surface of the rotating drum 2, and a receiving portion 9 of a lock body, which will be described later, is formed on one side 2A of the rotating drum 2 by fixing a short pipe or the like. has been done. Reference numeral 10 denotes a motor fixed to the rear lower part of the pedestal 1 via a partition wall 11, and a power transmission device 12 is provided between the motor 10 and the rotating drum 2. This power transmission device 12 includes a drive pulley 12A fixed to the rotating shaft of a motor 10 incorporating a reduction gear (not shown), a driven pulley 12B fixed to the central shaft 2B of the rotating drum 2, and these drive pulleys 12A. , a belt 12C that suspends a driven pulley 12B. Reference numeral 13 denotes a rod-shaped lock body, and this lock body 13 is slidably provided on a guide tube 14 provided on the pedestal 1 opposite to the receiving portion 9, and has a notch portion 13A formed in the center lower surface. ,
Further, an operating section 13B is provided at the end.

14A is a hole formed in the center lower surface of the guide tube 14. Reference numeral 15 designates an interlock switch such as a limit switch having a detection portion 15A protruding from the hole 14A of the guide cylinder 14, which detects when the rotating drum 2 is in a fixed state by the lock body 13. The portion 15A is pressed by the locking body 13 to open. 16 is an operation switch connected to the motor 10.

Next, the operation of the above structure will be explained.

The lock body 13 is inserted into the receiving part 9 in advance to fix the rotary drum 2, and the opening/closing lid 6 is opened to introduce fertilizer. Thereafter, the opening/closing lid 6 is fixed with the fixing fitting 8, and the locking body 13 is pulled to enable the rotary drum 2 to rotate. and operation switch 1
6 is closed, the motor 10 is driven, the rotary drum 2 is rotated via the power transmission device 12, and the fertilizer in the rotary drum 2 can be mixed. At this time, the lock body 13
Therefore, even if the operation switch 16 is closed even though the rotating drum 2 is in a fixed state, the motor 10 will not be driven because the interlock switch 15 is closed.

As described above, in the mixer provided with the lock body 13 for fixing the rotary drum 2,
By providing an interlock switch 15 responding to the lock body 13, the motor 10 will not start unless the fixed state in which the lock body 13 is pulled is released, so that even if the operation switch 16 is operated by mistake, the motor 10 will not start, eliminating the risk of the motor 10 burning out or the base 1 being deformed.

FIG. 5 shows a second embodiment, in which the same parts as in the first embodiment are denoted by the same reference numerals, and detailed explanation thereof will be omitted.

A pair of left and right pins 21 are erected on the front flange 3 of the pedestal 1, and a detection portion 22A of the second interlock switch 22 protrudes.
A small hole 23 into which the pin 21 can be inserted is formed at the tip of the opening/closing lid 6, and the second interlock switch 22, interlock switch 15, and motor 10 are connected in series.
The second interlock switch 22 is provided so as to open when the detection section 22A is pressed against the opening/closing lid 6.

Therefore, the opening/closing lid 6 is closed and the lock body 1 is closed.
Only when the motor 3 is pulled out, both interlock switches 15 and 22 are closed and the motor 10 can be driven.

In this way, by newly providing the second interlock switch 22 that responds to the opening/closing lid 6, the motor 10 can be driven only when the opening/closing lid 6 is closed and the rotary drum 2 is rotatable, thereby increasing safety. etc. can be further improved.

It should be noted that the present invention is not limited to the above-mentioned embodiments. For example, as shown in FIG. Various modifications are possible, such as providing a receiving part 9 by recessing the side surface 2A as shown in FIG. 8, or providing a timer in the middle of the electric circuit so that it can be stopped automatically. Further, the power transmission device may use a chain.

[Effects of the invention] In the present invention, a motor is connected via a power transmission device to a rotary drum mounted on a pedestal, a lock body that can be freely engaged and detached from the rotary drum is provided on the pedestal, and the motor is responsive to the lock body. An interlock switch for the motor is provided on the pedestal, and the interlock switch allows the motor to be driven only when the rotating drum is rotatable, thereby preventing motor burnout and deformation of the pedestal. can do.

[Brief explanation of the drawing]

Figures 1 to 3 show the first embodiment, with Figure 1 being a longitudinal sectional view, Figure 2 being a partially cutaway perspective view of the front side, Figure 3 being a perspective view of the rear side, and Figure 4 being a perspective view of the rear side. The figure is an electric circuit diagram, FIG. 5 is a partially cutaway perspective view showing the second embodiment, FIG. 6 is the same electric circuit diagram, FIG. 7 is a plan view showing the third embodiment, and FIG. FIG. 4 is a sectional view showing a fourth embodiment. 1... Frame, 2... Rotating drum, 10... Motor, 12... Power transmission device, 13... Lock body,
15...Interlock switch.

Claims (1)

[Scope of utility model registration request] A motor is connected via a power transmission device to a rotating drum mounted on a pedestal, a lock body that can be freely engaged and disengaged from the rotating drum is provided on the pedestal, and an interlock switch for the motor that responds to the lock body is provided in the pedestal. A mixing machine characterized by being installed on a stand.