Stretcher with neutralizing mechanism

Abstract

To provide a stretcher equipped with a neutralizing mechanism suppressing discomfort of instantaneous discharge caused by electrostatic charge of a stretcher.SOLUTION: A stretcher with a neutralizing mechanism includes: a metal frame whose legs are fitted with casters; side rails rotatably fitted to side lines of the metal frame; and pins which are provided for the side rail, and stop / cancel stop of rotation of the side rails by engaging / disengaging engaging recesses provided for the metal frame. In the stretcher, static elimination members are laid in the engaging recess. With the stretcher electrostatically charged, an operator pays attention to pins touched with fingertips, and arranges the static elimination members in the engaging recesses contacting the pins. Thus, the operator comes to touch the neutralizing member unconsciously and neutralizes the stretcher.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a stretcher equipped with a static elimination mechanism. [Background technology]

[0002] A stretcher is an instrument used to transport injured or sick patients, and is primarily used in hospitals and other facilities to transport patients in a supine position.

[0003] Stretcher legs are fitted with casters, and medical personnel transporting patients place them on the stretcher and push it to move. During this process, static electricity is generated as the casters slide against the floor, charging the stretcher. When medical personnel touch the metal frame of the stretcher to move the patient onto a hospital bed or operating table, the static electricity generated during the stretcher's movement discharges, causing pain and discomfort to the medical personnel.

[0004] Static electricity often builds up on stretchers, so to eliminate the static electricity, for example, Patent Document 1 uses conductive casters or a ground that comes into contact with the floor surface. Also, a discharge element that slowly discharges the electricity is provided. [Prior art documents] [Patent documents]

[0005] [Patent Document 2] Registered Utility Model No. 3007443 Summary of the Invention [Problem to be solved by the invention]

[0006] However, it is difficult to use conductive casters for all stretchers due to cost, and the grounding wires that come into contact with the floor surface can get caught on protrusions on the floor when the stretcher is moved, which is extremely dangerous. Also, there are cases where the natural discharge by the discharge element does not occur in time.

[0007] The present invention has been made in consideration of the above-mentioned problems, and provides a stretcher equipped with a static elimination mechanism that suppresses the discomfort caused by instantaneous discharge due to static electricity buildup on the stretcher. [Means for solving the problem]

[0008] In order to solve the above problems, in one aspect of the present disclosure, a stretcher is configured that includes a metal frame with casters attached to the legs, side rails that are rotatably attached to the sides of the metal frame, and pins that are provided on the side rails and that stop / release the rotation of the side rails by engaging / disengaging with engagement recesses provided on the metal frame, and that have an electrostatic discharging mechanism in which an electrostatic discharging member is placed in the engagement recesses.

[0009] According to this aspect, when the worker who has moved the stretcher touches the pin in an attempt to disengage the side rail, the static electricity in the metal frame is naturally discharged, thereby reducing the discomfort experienced by the worker due to discharge caused by the static electricity in the stretcher.

[0010] In one embodiment, the side rail is provided with an opening penetrating the side rail in the thickness direction, and the pin is arranged with its knob protruding into the opening.

[0011] In one embodiment, the static electricity eliminating member is laid on the bottom surface of the engagement recess, and an insulating member is attached to the side surface of the engagement recess. [Effects of the Invention]

[0012] According to the above configuration, a stretcher equipped with a static elimination mechanism that suppresses the discomfort caused by instantaneous discharge due to static electricity in the stretcher can be provided. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is an overall perspective view of a stretcher according to an embodiment of the present invention; [Figure 2] FIG. 2 is an enlarged perspective view of part A in FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] 10A and 10B are explanatory diagrams illustrating a rotation process of the side rails of the stretcher. [Figure 5] 10 is a flow chart illustrating an example of using a stretcher. [Figure 6] Test data is shown. [Figure 7] Test data is shown. [Figure 8] A modified example is shown. DETAILED DESCRIPTION OF THE INVENTION

[0014] (Stretcher 1) DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present disclosure will now be described with reference to the accompanying drawings. Fig. 1 is an overall perspective view of a stretcher 1 according to an embodiment.

[0015] The stretcher 1 is an instrument for transporting patients such as injured or sick people, and is used in hospitals and other facilities to transport patients in a supine position.

[0016] As shown in FIG. 1, the stretcher 1 includes a metal frame 4, side rails 5, a mat 6, casters 3, and a lifting handle 2.

[0017] The metal frame 4 is primarily composed of a rectangular lower frame 4a, an upper frame 4b, and a support link 4c that is attached to the lower frame 4a and supports the upper frame. When the lifting handle 2 is turned, the support link 4c expands and contracts, raising and lowering the upper frame 4b to adjust the height. A base and mat 6 for the patient to lie on are laid on the top surface of the rectangular upper frame 4b.

[0018] The casters 3 are configured to be able to rotate 360 ​​degrees on a vertical axis and have brakes (not shown). The casters 3 are attached to the bottom surface of the lower frame 4a, allowing the stretcher 1 to move, stop, and rotate in a small radius.

[0019] The side rails 5 are long boards made of resin and rotatably attached to both sides of the upper frame 4b. The side rails 5 are equipped with stoppers that fix the side rails 5 in an upright position. When transporting a patient, the side rails 5 are fixed in an upright position to prevent the patient from falling during transport. After transport, when the patient is to be moved to a medical bed, the side rails 5 are released from their locking position and rotated to lower them. By rotating the lifting handle 2 to match the height of the medical bed to be moved and placing it next to the bed, the medical bed and the mat 6 are continuous at the same height, making it easy to move the patient to the medical bed.

[0020] Two openings 5a and 5g are formed through the side rail 5 in the thickness direction to form a gripping portion that does not protrude outward. A worker can grip the side rail 5 by placing their hands on the edge of the side rail 5 and inserting their fingertips into the openings 5a and 5g to grasp the edge.

[0021] (Side rail 5) The stretcher 1 is equipped with a static elimination mechanism for eliminating static electricity generated during transport. The static elimination mechanism of the stretcher 1 is provided in the side rails 5, so the configuration of the side rails 5 will be described in detail first.

[0022] Figure 2 is an enlarged perspective view of Figure A in Figure 1. Figure 2(A) shows the side rail 5 in a raised position. Figure 2(B) shows the side rail 5 in a lowered position. Figure 3 is an end view taken along line III-III in Figure 2. In Figure 3, a spring 70, which will be described later, is shown as an actual object rather than in cross section.

[0023] As shown in FIG. 2, the side rail 5 has a rotation function mainly implemented by the shaft body 10, the rotor 11, and the connecting member 12, and a stopper function implemented by the pin 30 and the pin receiver 20.

[0024] The shaft 10 is a cylindrical metal body that serves as a rotating shaft for the side rail 5 and is fixed to the long side of the upper frame 4b with fasteners 8 at a distance from the side rail 5. A cylindrical rotor 11 is inserted into the shaft 10 and rotatably supported by the shaft 10. A generally U-shaped connecting member 12, formed by bending a flat plate, is inserted into the rotor 11 at its arc portion and fixed to the rotor 11, and clamps the side rail 5 at its straight portion and is fixed by a fixing member, connecting the rotor 11 and the side rail 5. The rotors 11 are provided at multiple locations in the extension direction of the shaft 10, and are each connected to the side rail 5 by a connecting member 12. As a result, the side rail 5 is integrated with the rotor 11 and is rotatable in the vertical direction around the center line AX of the shaft 10.

[0025] The opening 5a of the side rail 5 is located near an inner end face 5d, which is the end face closest to the shaft body 10. By providing the opening 5a, a rectangular pillar-shaped mounting portion 5c is formed as part of a frame formed around the periphery of the opening 5a. The mounting portion 5c is a mounting portion for the pin 30, and one of its side surfaces forms the inner end face 5d. An insertion hole 5b is formed in the mounting portion 5c, penetrating from the inner end face 5d to the inner peripheral wall 5e of the opening 5a. The pin 30 is inserted into the insertion hole 5b and is slidably supported in the insertion hole 5b.

[0026] A pin receiver 20 is arranged between the mounting portion 5c and the shaft body 10 and is fixed to the shaft body 10. The pin receiver 20 is made of a metal member and has a roughly rectangular parallelepiped outer shape. The pin receiver 20 has holes formed through a pair of opposing side surfaces, and the holes are inserted into the shaft body 10 and the pin receiver 20 is fastened to the shaft body 10 by a fixing member, thereby being fixed to the shaft body 10.

[0027] As shown in Fig. 3, a metal knob 31 provided on the head of the pin 30 protrudes toward the opening 5a, and the tip of the pin 30 protrudes toward the inner end face 5d. The pin 30 is held in the insertion hole 5b while passing through the mounting portion 5c. The pin 30 is biased toward the inner end face 5d in the insertion hole 5b by a spring 70, which is an elastic member, and is supported so as to be able to protrude and retract into the inner end face 5d. A cover 71, which covers at least a portion of the opening of the inner peripheral wall 5e of the insertion hole 5b, is fixed to the mounting portion 5c to prevent the pin 30 from falling out of the insertion hole 5b.

[0028] An engagement recess 23 into which the pin 30 engages is formed on the upper surface of the pin receiver 20. When the side rail 5 is rotated around the shaft 10 and placed upright, the tip of the pin 30 protruding from the inner end surface 5d enters and engages with the engagement recess 23, preventing the side rail 5 from rotating.

[0029] An electrostatic discharge member 50 is placed in the engagement recess 23 with which the pin 30 engages. When the tip surface 33 of the pin 30 enters and engages with the engagement recess 23, the tip surface 33 of the pin 30, biased by the spring 70, comes into contact with the electrostatic discharge member 50 provided on the bottom surface of the engagement recess 23.

[0030] The electrostatic neutralizing member 50 is primarily made of rubber or plastic (electrostatic neutralizing resin), but it may also be a composite material made by mixing a material with high electrical resistance with a material with low electrical resistance, such as metal, and its constituent materials are not critical. A commonly available general-purpose product will suffice. The electrostatic neutralizing member 50 discharges stored electricity relatively slowly. While discharge from a metal member is very short and instantaneous, discharge from the electrostatic neutralizing member 50 is approximately one second or less, which is longer than that of a metal member. The engagement mechanism of the pin 30 and the electrostatic neutralizing member 50 implement the neutralization mechanism of the stretcher 1.

[0031] (Pin Move) The manner in which the side rail 5 equipped with a stopper function moves will be described with reference to FIG. 4. FIG. 4 is a vertical cross-sectional view taken along line III-III in FIG. 2, and is an explanatory diagram illustrating the movement of the side rail 5 including the pin 30. For ease of explanation, the spring 70 is shown in FIG. 4 as an actual object rather than a cross-section. FIG. 4 corresponds to FIG. 3.

[0032] As an example, a process will be described in which the side rail 5 is set upright and prevented from rotating by the pin 30, and then rotated and moved vertically downward.

[0033] First, as shown in Figure 4(A), in the initial state where the side rail 5 is upright, the tip of the pin 30 supported in the insertion hole 5b of the side rail 5 protrudes from the inner end surface 5d and fits into and engages with the engagement recess 23 of the pin receiver 20. The pin 30 acts as a stopper, preventing the side rail 5 from rotating. At this time, the pin 30 is biased by the spring 70 toward the inner end surface 5d of the side rail 5, in other words, toward the center line AX (see the black arrow DR1 in Figure 4), and the tip surface 33 of the pin 30 abuts against the static electricity removing member 50 provided on the bottom surface of the engagement recess 23.

[0034] To rotate the side rail 5 in a vertical state, as shown in Figure 4(B), the worker grasps the knob 31 of the pin 30, lifts the pin 30 upward against the biasing force of the spring 70 (see white arrow DR2 in Figure 4), and pulls it out of the engagement recess 23 (see Figure 4(C)).

[0035] When the pin 30 is pulled out of the engagement recess 23, the engagement between the pin 30 and the engagement recess 23 is released. The side rail 5 is no longer held stationary by the pin 30 and is now rotatable, so the worker rotates the side rail 5 downward about the center line AX. When the side rail 5 is rotated to a vertically downward position, it comes to a stop under its own weight.

[0036] Conversely, when side rail 5 is rotated up from a vertically lowered position to stand upright, the outer surface of pin receiver 20 has a smoothly curved surface with no corners removed, so that by simply rotating side rail 5, tip surface 33 of pin 30 slides smoothly along the outer surface of pin receiver 20 from the bottom to the top. When side rail 5 is set upright, pin 30 is biased by spring 70 and slides in the direction of center line AX, fitting into engagement recess 23. In this way, when raising side rail 5 to stand it upright, the worker does not need to touch pin 30; simply by rotating side rail 5 upright, side rail 5 can be fixed in the upright position.

[0037] (Static electricity removing member 50) As described above, the static electricity removing member 50 is placed in the engagement recess 23 of the pin receiver 20. The pin receiver 20 is fixed to the shaft body 10, which is fixed to the upper frame 4b with a metal fastener 8 (see FIG. 1). For this reason, the pin receiver 20 can also be said to be part of the metal frame 4. The pin 30 and pin knob 31 are also made of metal materials to ensure sufficient rigidity as engagement members.

[0038] When a worker touches the metal part of the stretcher while it is electrically charged, the charge stored in the stretcher is transferred from the point of contact to the worker. When the worker touches the metal part of the stretcher with their fingertips, the charge stored in the stretcher is instantly discharged, causing pain in the worker's fingertips.

[0039] In contrast, in the stretcher 1, an electrostatic discharging member 50 is installed in the engagement recess 23 of the pin receiver 20 connected to the metal frame 4, and the pin 30 engaged in the engagement recess 23 abuts against the electrostatic discharging member 50. When a worker touches the pin 30 to rotate the side rail 5, the pin 30 is in contact with the electrostatic discharging member 50, so the charge on the metal frame 4 is slowly transferred via the electrostatic discharging member 50, preventing instantaneous discharge. This prevents pain in the fingertips due to static discharge and reduces the discomfort caused by touching a charged stretcher.

[0040] (Action and effect) The effect of the static elimination mechanism of the stretcher 1 will be explained in detail. The stretcher 1 is designed to suppress instantaneous discharge to the human body when static electricity is generated and the charge is high. This will be explained in detail with reference to Figure 5.

[0041] FIG. 5 shows an example of how the stretcher 1 is used, illustrating the flow of steps for operating the stretcher 1 when using the stretcher 1 to move a patient to a medical bed.

[0042] First, in step S101, the operator rotates the lifting handle 2 to raise or lower the height of the upper frame 4b, thereby adjusting the height of the base and the mat 6.

[0043] Next, the process proceeds to step S102, where the operator places the patient on the mat 6 laid on the upper frame 4b whose height has been adjusted.

[0044] Next, the process proceeds to step S103, where the worker sets the side rail 5 upright. As mentioned above, the worker does not need to touch the pin 30; simply by rotating the side rail 5 to the vertical position, the pin 30 automatically engages with the engagement recess 23, and the side rail 5 is fixed in the vertical position.

[0045] Next, the process proceeds to step S104, where the worker transports the patient on the stretcher 1. The worker pushes the stretcher 1 with the patient on it down the aisle to transport the patient. At this time, the casters of the stretcher 1 slide against the floor surface, generating static electricity, which charges the stretcher 1. The charge is stored mainly in the metal frame 4.

[0046] Next, the process proceeds to step S105, where the worker places the stretcher 1 next to the medical bed. When the worker arrives at the destination treatment room, hospital room, operating room, etc., the worker places the stretcher 1 next to the medical bed in order to move the patient to the medical bed.

[0047] Next, the process proceeds to step S106, where the worker lowers the side rail 5. To move the patient from the stretcher 1 to the medical bed, the worker pulls up the pin 30 to disengage it, and then rotates and lowers the side rail 5.

[0048] Next, the process proceeds to step S107, where the worker moves the patient from the stretcher 1 to a medical bed.

[0049] Because the stretcher 1 is a device for moving patients, it must always be moved along the floor. When the stretcher 1 is moved, static electricity is generated by the sliding of the casters 3 against the floor surface. This generated charge is stored in the metal frame 4, which then becomes electrically charged. When the stretcher 1 is used to transport a patient, the side rails 5 are in an upright position. Therefore, after arriving at the destination, the side rails 5 must be lowered to move the patient from the stretcher 1 to the medical bed. At this time, the worker touches the pins 30 to release the lock of the side rails 5. When moving the stretcher 1 without a patient on it, the side rails 5 do not need to be raised, and the worker does not need to touch the pins 30. When loading a patient onto the stretcher 1, the stretcher 1 is moved from its storage location, the patient is then loaded, and the side rails 5 are raised. However, the side rails 5 are fixed in a vertical position simply by rotating them, so the worker again does not need to touch the pins 30.

[0050] In other words, the situation in which the worker touches pin 30 is immediately after the stretcher 1 has been started with a patient on board, and there is a high probability that the metal frame 4 is charged. The side rails 5 are made of non-metallic materials, and in a situation in which there is a high probability that the metal frame 4 is charged, the first metal part of the stretcher 1 that the worker touches is pin 30. Furthermore, in order for the worker to release the engagement of pin 30, the worker must pull tab 31 up from the engagement recess 23, and the worker first grasps tab 31 with their fingertips. The worker will touch pin 30 with their fingertips, which are prone to pain from instantaneous discharge.

[0051] For this reason, in this embodiment, the electrostatic discharge member 50 is provided in the engagement recess with which the pin 30 abuts, so that even if the worker touches the pin 30 with his / her fingertip, the charge is transferred to the worker via the electrostatic discharge member 50. This prevents instantaneous discharge and prevents the worker from feeling pain due to the discharge of the charge stored in the metal frame 4.

[0052] The static electricity eliminating member 50 can be installed later in the engagement recess 23, and can be easily replaced when the static electricity eliminating effect weakens. Installation is easy because the static electricity eliminating member 50 is installed in the engagement recess 23 simply by inserting an appropriately sized static electricity eliminating member 50 into the downwardly recessed engagement recess 23. There is no need to worry about the member peeling off or falling off.

[0053] For example, if an electrostatic discharger is attached to another part of the metal frame, the worker must touch the electrostatic discharger every time before touching the metal part of the stretcher to avoid instantaneous discharge of static electricity. In a high-risk situation such as transporting a patient on a stretcher, it is difficult to remember to do this every time.

[0054] In this invention, we focused on the pins 30, which are connected to the metal frame 4 and are the first to be touched in situations where there is a high probability that they are charged. Since the pins 30 engage the side rails 5, they must be made of a highly rigid material, and due to strength issues, the pins themselves cannot be made of a static-removing material. By installing the static-removing member 50 in the engagement recess 23 with which the pins 30 abut, we have created a configuration that prevents problems caused by static electricity, i.e., pain to the worker due to instantaneous discharge. When using the stretcher 1, the worker will come into contact with the static-removing member 50 via the pins 30 as part of a natural movement, and the static-removing effect can be achieved without the worker even thinking about removing static electricity.

[0055] Additionally, in the stretcher 1, the pin 30 is disposed with its knob 31 protruding from the opening 5a. The opening 5a is formed to provide a grip for the side rail 5, and when a worker grasps the side rail 5, they place their palm on the end face (outer end face 5h) of the side rail 5 other than the inner end face 5d and insert their fingertips into the opening 5a to grasp the side rail 5. The knob 31 of the pin 30 protrudes from the mounting portion 5c formed opposite the grip. Therefore, when a worker places their palm on the outer end face 5h and their fingers into the opening 5a to grasp and rotate the erected side rail 5, their fingertips come into contact with the knob 31. The worker then grips the grip, pinches the knob 31 with their fingertips, and can perform a pulling action. When a worker attempts to release the side rail 5 from its upright position, their fingertips naturally touch the knob 31, allowing the worker to neutralize the static electricity on the metal frame 4 without even being aware of the static elimination. This configuration is also applicable to situations where the pin 30 protrudes from the opening 5a, which serves as a gripping portion as described above, and the worker must reach into the opening to grasp the pin 30, inserting their fingertips into the opening to pinch the pin 30. For example, if the side rail 5 is fence-shaped, the openings would be between the posts of the fence. In this embodiment, the pin 30 is biased by the spring 70, but this configuration can also be applied to situations where the pin is slid or rotated to engage / disengage.

[0056] (Test data) Figure 6 shows data obtained from an actual test. In the test, the metal frame 4 was charged, and the voltage applied to the metal frame 4 was measured, and the voltage values ​​before and after the worker (subject) touched the pin 30 were shown. In addition, whether or not there was a discharge sound when touching the pin 30 and whether or not the subject felt pain were also investigated. As a comparative test, a case was also conducted in which the static electricity eliminating member 50 was not placed in the engagement recess 23.

[0057] As shown in Figure 6, when the test subject touched the pin 30 with the metal frame 4 charged to 2.1 kV, the charged voltage dropped from 2.1 kV to 0.1 kV, confirming that the charge had been discharged. No discharge noise was generated during the discharge, and the test subject felt no pain.

[0058] In contrast, when the static eliminating member 50 was not placed in the engagement recess 23, the metal frame 4 was charged to 2.1 kV, and when the subject touched the pin 30, the voltage dropped from 2.1 kV to 0.3 kV, confirming that a discharge had occurred. However, the moment the subject touched the pin 30, a discharge sound was heard and the subject felt pain in their fingertips.

[0059] By placing the electrostatic neutralizing member 50 in the engagement recess 23 where the pin 30 abuts, it was possible to neutralize the charge on the metal frame 4 without generating any problems during discharge, such as discharge noise or pain. If the electrostatic neutralizing member 50 had not been provided in the engagement recess 23, an instantaneous discharge would have occurred the moment the subject touched the pin 30, causing pain along with the discharge noise. It was confirmed that simply placing the electrostatic neutralizing member 50 in the engagement recess 23 was sufficient to achieve a neutralizing effect and also suppressed problems during neutralization.

[0060] 7 shows data representing the results of another test, showing the static elimination time and the pain relief effect on the subject when the same experiment as in FIG. 6 was performed by changing the type of static elimination member used in the static elimination member 50.

[0061] As shown in Fig. 7, the static eliminators A, B, and C used as the electrostatic eliminator 50 each have a different electrical resistance. The smaller the electrical resistance, the easier it is for electricity to pass through the material. The smaller the electrical resistance of each static eliminator material, the shorter the static elimination time but the more pain there is. The larger the electrical resistance, the longer the static elimination time but the less pain there is during static elimination.

[0062] Based on these results, workers can select the static eliminator to be used for the electrostatic eliminator 50. For example, in the case of stretchers mounted on emergency vehicles, it is important to move patients quickly and provide treatment as quickly as possible, so workers act very quickly. Static eliminator A, which has a very short contact time with the pins 30 and a fast static elimination time, can be selected. In hospitals and facilities, static eliminator C can be selected to improve the working environment for medical workers so that they do not feel pain due to static electricity. Either static eliminator can achieve a static elimination effect by being placed in a recess, and a static eliminator material that achieves the desired effect can be selected depending on the environment and cost.

[0063] (Variation) Next, a modified example will be described. Fig. 8 shows the modified example. Fig. 8 corresponds to Fig. 3. Components having the same configuration are given the same reference numerals, and duplicated explanations will be omitted.

[0064] The modified stretcher 1' has the same configuration as the stretcher 1, except that an electrostatic discharge member 50' is installed only on the bottom surface of the engagement recess 23 of the pin receiver 20, and an insulating member 60 is attached to the side surface of the engagement recess. The electrostatic discharge member 50' is the same component as the electrostatic discharge member 50, and the only difference is that it is installed only on the bottom surface of the engagement recess 23. The insulating member 60 is made of an insulator that does not have free electrons and does not conduct electricity. This prevents the pin 30 from abutting or approaching the side surface of the engagement recess 23, which would cause static electricity to be discharged.

[0065] The side surfaces of the engagement recess 23 may rub against the pin 30 when the pin 30 moves in and out of the engagement recess 23, and the electrostatic neutralizing member 50 arranged on the side surfaces of the engagement recess 23 is more susceptible to deterioration due to sliding than the electrostatic neutralizing member 50 arranged on the bottom surface. Deterioration of the electrostatic neutralizing member 50 leads to a decrease in the neutralizing effect. In general, the insulating member 60 is less expensive than the electrostatic neutralizing member 50, and by arranging the insulating member 60 on the side surfaces of the engagement recess 23, it is possible to prevent a decrease in the neutralizing effect and reduce running costs. Although the preferred embodiments of the present invention have been described above, modifications can be made based on the knowledge of those skilled in the art, and such modifications are within the scope of the present invention. [Explanation of symbols]

[0066] 1: Stretcher 3: Caster 4: Metal frame 5: Side rail 5a: opening 20: Pin holder 23: Engagement recess 30: Pin 50: Electrostatic discharge material 50: Antistatic material 60: Insulating material

Claims

1. A metal frame with casters attached to the legs, a side rail rotatably attached to a side edge of the metal frame; a pin provided on the side rail, which engages / disengages with an engaging recess provided on the metal frame to stop / release rotation of the side rail; Equipped with An electrostatic discharge member is placed in the engagement recess. A stretcher equipped with a static elimination mechanism.

2. The side rails are provided with openings that penetrate in the thickness direction, The pin is disposed with a knob protruding into the opening.

2. The stretcher according to claim 1.

3. The static electricity removing member is laid on a bottom surface of the engagement recess, An insulating member is attached to the side surface of the engagement recess.

3. A stretcher according to claim 1 or claim 2.

Images