JPH0229927Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Field of industrial application] This invention is used for X-ray inspection of the circulatory system, etc.
Place the subject on the top plate and move it in the longitudinal direction,
The present invention relates to an examination table that allows a patient to be moved to a predetermined position such as a fluoroscopy/imaging position.

[Conventional technology]

Generally, when diagnosing or treating diseases such as the circulatory system or urinary system, the patient is placed on the top of the examination table.
The top plate is moved and positioned to a predetermined photographing position. In this cardiovascular testing system,
When direct imaging is required with a fluoroscopy-only imaging device that cannot be equipped with a direct imaging system, the direct imaging device and the fluoroscopy-only imaging device are placed parallel to the examination table, and the switch from fluoroscopy to imaging can be made by moving the top plate. The test subject is sent to each predetermined location. Therefore, the sliding amount of the top plate must be larger than that of an examination table that can be equipped with a direct imaging system. Therefore, in order to obtain a high stroke, the guide rail 11 is lengthened as shown in FIG. 5 to increase the stroke in the longitudinal direction of the top plate 10, or as shown in FIG.
3 is made into two stages to achieve a high stroke.

[Problem that the invention attempts to solve]

In the above-mentioned means for obtaining a high stroke, if the guide rail is made long, the guide rail protrudes when the top plate is retracted, which may cause accidents when the examinee jams his or her fingers when pulling out the top plate, or the corners may become sharp. It is extremely dangerous for the operator to come into contact with the ivy part. In addition, even with a two-tiered rail, as shown by the two-dot chain line in FIG. 6, only the top plate retracts and the second rail protrudes, causing the same dangerous situation as described above.

This invention solves the problems in the above-mentioned conventional example when the patient is placed on the top of the examination table and the patient is moved to a predetermined position with a high stroke in the longitudinal direction. The purpose of this test is to provide an examination table with safety measures in place to prevent dangerous situations for the operator and the patient.

[Means for solving problems]

In order to solve the above problems, the examination table according to this invention has a fixed support stand, a lower table that is movable relative to the support stand, and a lower table that is movable relative to the lower table. In an examination table comprising an upper table, a permanent magnet for attracting and fixing the lower table is fixed on the upper surface of the support base, a coil is wound around the permanent magnet, and the upper table is attached to the lower table. A permanent magnet for attracting and fixing is fixed, a coil is wound around the permanent magnet, and when the lower table and the upper table are pulled out from the support base and moved, the upper table always moves in advance,
A coil energization circuit is provided to selectively apply electromagnetic force in a direction to eliminate the magnetic force of each of the permanent magnets so that the lower table always moves in advance when it is stored and moved to the support stand side. It consists of

[Effect]

The examination table according to this invention is constructed as described above, and the movement of the lower table with respect to the support table and the movement of the upper table with respect to the lower table are regulated by the magnetic force of permanent magnets fixed to the support table and the lower table. However, if the coil energization circuit energizes the coils wound around each permanent magnet at different timings, electromagnetic force acts on each coil in the direction of canceling the magnetic force of the permanent magnet, and it starts moving. At times, the regulation by the permanent magnet is released so that the upper table goes first when pulling out the upper and lower tables, and the lower table goes first when storing them.

〔Example〕

FIG. 1 is a front view schematically showing the configuration of an examination table that is an embodiment of this invention. The lower table 2 has bearings on both sides, so that the lower table 2 itself can move relative to the support base 1, and the lower table 2 can be moved relative to the upper table 2 in a U-shaped notch in the center. The table 3 supports shafts from the support base 1 and the upper table 3 so as to be relatively movable.

FIG. 2 is a plan view showing the relative movement between the lower table 2 and the upper table 3, and showing only the upper and lower tables.

The support stand 1 has a lower table 2 and an upper table 3.
microswitch 4, which detects the position of each
5 is installed. When the microswitches 4 and 5 are configured to be attached to the support base 1, the electrical wiring can be done on the fixed support base side, making the wiring easy. The origin position or the maximum stroke position before the upper and lower tables move relative to the support base 1 is detected by the micro switch 4,
It is determined by the ON/OFF status of 5. Further, an electromagnetic lock 6 is installed on the support base 1 so that the lower table 2 can be locked at any position, and an electromagnetic lock 7 is installed on the lower table 2 so that the upper table 3 can be locked at any position. These electromagnetic locks 6 and 7 are constructed by winding a coil around a permanent magnet, and when the coil is excited, the electromagnetic force acts to cancel the magnetic force of the permanent magnet. Therefore,
By activating the electromagnetic locks 6 and 7, the restraint of the magnetic force is canceled and the locked state of each table is released, which is the opposite of the normal operation.

The coils of the electromagnetic locks 6 and 7 are energized by the third
This is done by the coil energization circuit shown in the figure, and the energization state is determined by the ON and OFF states of micro switches 4 and 5.
It is configured to be determined by turning on the operating switch 8 according to the state. In Figure 3, when micro switch 5 is OFF, it is the ON contact; when it is ON, it is on the NC contact side, and when micro switch 4 is OFF, it is on the NC contact side.
When it is, it is the NC contact, and when it is ON, it is the NO contact. Switch 8 is placed on the common contact side of micro switches 4 and 5.
are connected in series, and a relay R ₁ is connected in series to the NC contact of the micro switch 5, and a relay R ₂ is connected in series to the NC contact of the micro switch 4.
The operating contact of relay _R1 is connected to the coil of electromagnetic lock 6,
The operating contacts of relay _R2 are each connected in series with the coil of electromagnetic lock 7.

FIG. 4 is a diagram illustrating the ON and OFF operating states of the micro switches 4 and 5 for each position of the upper and lower tables in the coil energizing circuit shown in FIG. 3. Figure A shows that the upper and lower tables are at their maximum stroke positions, and the micro switches 4 and 5 are both in the ON state. In the figure B, only the upper table 3 is at the maximum stroke position relative to the lower table 2, and the lower table 3 is at its maximum stroke.
is at the origin position, and micro switch 4 is OFF.
Indicates that it is in a state. Figure C shows that the upper and lower tables are at their original positions, and the microswitches 4 and 5 are both in the OFF state.

Next, the operation of the upper and lower tables of the examination table configured as described above from the maximum stroke state to the return to the original position will be described with reference to FIGS. 3 and 4. When the upper and lower tables are at their maximum stroke (FIG. 4A), microswitches 4 and 5 are in the ON state, with the contact of microswitch 4 being on the NO side and the contact of microswitch 5 being on the NC side. At this time, the electromagnetic locks 6 and 7 are not activated, and the lower table 2 is moved to the support base 1 by the magnetic force of the permanent magnet.
The upper table 3 is fixed to the lower table 2 by suction. When switch 8 is turned on in this state, relay _R1 is energized and the coil of electromagnetic lock 6 is energized, and upper table 3 remains locked while lower table 2 is unlocked and can move freely. can.

When the lower table 2 returns to its home position (Fig. 4 b), the micro switch 4 turns OFF, its contact moves to the NC side, relay R ₂ is energized, the coil of the electromagnetic lock 7 is energized, and the upper table 3 is turned off. The locked state of the table is released, and both the upper and lower tables can be moved. However, since the lower table 2 has returned to its original position, only the upper table 3 can move toward the original position. At this time, if the table is moved in the stroke direction, relay _R1 is energized and the lock on lower table 2 is released, so lower table 2 moves, micro switch 4 is turned on, and relay _R2 is turned off. and electromagnetic lock 7
The power to the upper table 3 is cut off and the upper table 3 is locked. As described above, this locked state is released when the lower table 2 comes to the original position.

When the upper table 3 is moved a little toward the origin with respect to the lower table 2 at the origin position (the fourth
Figure b), micro switch 5 turns OFF, and the relay
_R1 is turned OFF, power to the electromagnetic lock 6 is cut off, the lower table 2 is locked, and only the upper table 3 can be moved. When the upper table 3 returns to its original position, the upper table 3 is locked by turning off the switch 8.

When moving from the state shown in FIG. 4C to the state shown in FIG.

〔effect〕

Since the device according to this invention is configured and operates as described above, when the upper table on which the patient is placed is made into a two-tiered table, and the upper table on which the patient is placed has a long stroke in the longitudinal direction, when returning it to the origin position, The lower table returns to the home position first, and when the upper table is moved to the high stroke position, the upper table takes the lead, eliminating the need for the lower table to protrude and prevent the patient from being examined as before. This prevents fingers from getting stuck in the protruding guide rail or coming into contact with the surgeon at the protruding part.
Can be used safely. Furthermore, since there are no protruding parts, examination can be performed from around the subject, increasing examination efficiency.

[Brief explanation of the drawing]

Fig. 1 is a front view schematically showing the configuration of an examination table that is an embodiment of this invention, Fig. 2 is a diagram illustrating the movement state of the upper and lower tables, and Fig. 3 is a circuit showing the configuration of the coil energization circuit. 4A, 4B, and 4C are diagrams for explaining the operation, and FIGS. 5 and 6 are diagrams for explaining the conventional example. 1...Support stand, 2...Lower table, 3...Upper table, 4, 5...Micro switch, 6,
7...Electromagnetic lock, 8...Switch.

Claims (1)

[Scope of utility model registration request] In an examination table comprising a fixed support stand, a lower table movable relative to the support stand, and an upper table movable relative to the lower table, the support stand A permanent magnet that attracts and fixes the lower table is fixed on the upper surface, and a coil is wound around the permanent magnet, and a permanent magnet that attracts and fixes the upper table is fixed on the lower table, and the permanent magnet When the coil is wound and the lower table and the upper table are pulled out from the support base and moved, the upper table always moves first, and when the lower table is stored and moved to the support base side, the lower table is always moved. A medical examination table characterized in that a coil energization circuit is provided for selectively applying electromagnetic force in a direction that eliminates the magnetic force of each of the permanent magnets so that the table moves first.